Start insert performance improvements

add support for input and scalar defintiions (for graphql-tools schema)

.gitignore

@@ -7,3 +7,12 @@ tmp.sh
 test/
 .idea/
 packages/
+todo.txt
+test.txt
+log.txt
+*.old
+tools/build-version
+tools/build-date
+tools/info-plist
+tools/bindata
+*.hdr

.gitmodules

@@ -1,63 +1,3 @@
-[submodule "cmd/micro/vendor/github.com/blang/semver"]
-	path = cmd/micro/vendor/github.com/blang/semver
-	url = https://github.com/blang/semver
-[submodule "cmd/micro/vendor/github.com/dustin/go-humanize"]
-	path = cmd/micro/vendor/github.com/dustin/go-humanize
-	url = https://github.com/dustin/go-humanize
-[submodule "cmd/micro/vendor/github.com/go-errors/errors"]
-	path = cmd/micro/vendor/github.com/go-errors/errors
-	url = https://github.com/go-errors/errors
-[submodule "cmd/micro/vendor/github.com/mattn/go-isatty"]
-	path = cmd/micro/vendor/github.com/mattn/go-isatty
-	url = https://github.com/mattn/go-isatty
-[submodule "cmd/micro/vendor/github.com/mattn/go-runewidth"]
-	path = cmd/micro/vendor/github.com/mattn/go-runewidth
-	url = https://github.com/mattn/go-runewidth
-[submodule "cmd/micro/vendor/github.com/mitchellh/go-homedir"]
-	path = cmd/micro/vendor/github.com/mitchellh/go-homedir
-	url = https://github.com/mitchellh/go-homedir
-[submodule "cmd/micro/vendor/github.com/sergi/go-diff"]
-	path = cmd/micro/vendor/github.com/sergi/go-diff
-	url = https://github.com/sergi/go-diff
-[submodule "cmd/micro/vendor/github.com/yuin/gopher-lua"]
-	path = cmd/micro/vendor/github.com/yuin/gopher-lua
-	url = https://github.com/yuin/gopher-lua
-[submodule "cmd/micro/vendor/golang.org/x/net"]
-	path = cmd/micro/vendor/golang.org/x/net
-	url = https://go.googlesource.com/net
-[submodule "cmd/micro/vendor/github.com/zyedidia/clipboard"]
-	path = cmd/micro/vendor/github.com/zyedidia/clipboard
-	url = https://github.com/zyedidia/clipboard
-[submodule "cmd/micro/vendor/github.com/zyedidia/glob"]
-	path = cmd/micro/vendor/github.com/zyedidia/glob
-	url = https://github.com/zyedidia/glob
-[submodule "cmd/micro/vendor/github.com/zyedidia/tcell"]
-	path = cmd/micro/vendor/github.com/zyedidia/tcell
-	url = https://github.com/zyedidia/tcell
-[submodule "cmd/micro/vendor/github.com/gdamore/encoding"]
-	path = cmd/micro/vendor/github.com/gdamore/encoding
-	url = https://github.com/gdamore/encoding
-[submodule "cmd/micro/vendor/golang.org/x/text"]
-	path = cmd/micro/vendor/golang.org/x/text
-	url = https://go.googlesource.com/text
-[submodule "cmd/micro/vendor/github.com/lucasb-eyer/go-colorful"]
-	path = cmd/micro/vendor/github.com/lucasb-eyer/go-colorful
-	url = https://github.com/lucasb-eyer/go-colorful
-[submodule "cmd/micro/vendor/layeh.com/gopher-luar"]
-	path = cmd/micro/vendor/layeh.com/gopher-luar
-	url = https://github.com/layeh/gopher-luar
-[submodule "cmd/micro/vendor/gopkg.in/yaml.v2"]
-	path = cmd/micro/vendor/gopkg.in/yaml.v2
-	url = https://gopkg.in/yaml.v2
-[submodule "cmd/micro/vendor/github.com/zyedidia/poller"]
-	path = cmd/micro/vendor/github.com/zyedidia/poller
-	url = https://github.com/zyedidia/poller
-[submodule "cmd/micro/vendor/github.com/flynn/json5"]
-	path = cmd/micro/vendor/github.com/flynn/json5
-	url = https://github.com/flynn/json5
-[submodule "cmd/micro/vendor/github.com/zyedidia/terminal"]
-	path = cmd/micro/vendor/github.com/zyedidia/terminal
-	url = https://github.com/zyedidia/terminal
-[submodule "cmd/micro/vendor/github.com/zyedidia/pty"]
-	path = cmd/micro/vendor/github.com/zyedidia/pty
-	url = https://github.com/zyedidia/pty
+[submodule "tools/go-bindata"]
+	path = tools/go-bindata
+	url = https://github.com/zyedidia/go-bindata

.travis.yml

@@ -1,2 +1,9 @@
 language: go
-script: make test
+go:
+    - "1.11.x"
+os:
+    - linux
+    - osx
+script:
+    - env GO111MODULE=on make build
+    - env GO111MODULE=on make test

LICENSE-THIRD-PARTY

@@ -1,4 +1,4 @@
-Third party libraries
+Third party libraries directly used by micro and their licenses
 ================
 
 github.com/golang/go/LICENSE
@@ -58,7 +58,6 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
-
 github.com/gdamore/encoding/LICENSE
 ================
 
@@ -395,7 +394,9 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
 
-github.com/zyedidia/clipboard/LICENSE
+github.com/atotto/clipboard/LICENSE
+================
+github.com/zyedidia/clipboard/LICENSE (fork)
 ================
 
 Copyright (c) 2013 Ato Araki. All rights reserved.
@@ -427,7 +428,9 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
-github.com/zyedidia/tcell/LICENSE
+github.com/gdamore/tcell/LICENSE
+================
+github.com/zyedidia/tcell/LICENSE (fork)
 ================
 
 
@@ -634,70 +637,6 @@ github.com/zyedidia/tcell/LICENSE
    limitations under the License.
 
 
-golang.org/x/net/LICENSE
-================
-
-Copyright (c) 2009 The Go Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-golang.org/x/sys/LICENSE
-================
-
-Copyright (c) 2009 The Go Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
 golang.org/x/text/LICENSE
 ================
 
@@ -1109,6 +1048,8 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
 
 github.com/flynn/json5/LICENSE
 ================
+github.com/zyedidia/json5/LICENSE (fork)
+================
 
 Decoder code based on package encoding/json from the Go language.
 
@@ -1167,6 +1108,8 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 github.com/james4k/terminal/LICENSE
 ================
+github.com/zyedidia/terminal/LICENSE (fork)
+================
 
 Copyright (C) 2013 James Gray
 
@@ -1190,6 +1133,8 @@ SOFTWARE.
 
 github.com/kr/pty/License
 ================
+github.com/zyedidia/pty/License (fork)
+================
 
 Copyright (c) 2011 Keith Rarick
 
@@ -1214,3 +1159,148 @@ OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+github.com/npat-efault/poller/LICENSE.txt
+================
+github.com/zyedidia/poller/LICENSE.txt (fork)
+================
+
+Copyright (c) 2014, Nick Patavalis (npat@efault.net)
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+github.com/zyedidia/glob
+================
+
+Glob is licensed under the MIT "Expat" License:
+
+Copyright (c) 2016: Zachary Yedidia.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+github.com/dustin/go-humanize/LICENSE
+================
+
+Copyright (c) 2005-2008  Dustin Sallings <dustin@spy.net>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+<http://www.opensource.org/licenses/mit-license.php>
+
+gopkg.in/yaml.v2/LICENSE
+================
+
+Copyright 2011-2016 Canonical Ltd.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+github.com/kballard/go-shellquote/LICENSE
+===============
+
+Copyright (C) 2014 Kevin Ballard
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+github.com/stretchr/testify
+=================
+
+MIT License
+
+Copyright (c) 2012-2018 Mat Ryer and Tyler Bunnell
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -1,49 +1,51 @@
 .PHONY: runtime
 
-VERSION := $(shell GOOS=$(shell go env GOHOSTOS) GOARCH=$(shell go env GOHOSTARCH) \
+VERSION = $(shell GOOS=$(shell go env GOHOSTOS) GOARCH=$(shell go env GOHOSTARCH) \
 	go run tools/build-version.go)
-HASH := $(shell git rev-parse --short HEAD)
-DATE := $(shell GOOS=$(shell go env GOHOSTOS) GOARCH=$(shell go env GOHOSTARCH) \
+HASH = $(shell git rev-parse --short HEAD)
+DATE = $(shell GOOS=$(shell go env GOHOSTOS) GOARCH=$(shell go env GOHOSTARCH) \
 	go run tools/build-date.go)
-ADDITIONAL_GO_LINKER_FLAGS := $(shell GOOS=$(shell go env GOHOSTOS) \
-	GOARCH=$(shell go env GOHOSTARCH) \
-	go run tools/info-plist.go "$(VERSION)")
+ADDITIONAL_GO_LINKER_FLAGS = $(shell GOOS=$(shell go env GOHOSTOS) \
+	GOARCH=$(shell go env GOHOSTARCH))
 GOBIN ?= $(shell go env GOPATH)/bin
+GOVARS = -X github.com/zyedidia/micro/internal/util.Version=$(VERSION) -X github.com/zyedidia/micro/internal/util.CommitHash=$(HASH) -X 'github.com/zyedidia/micro/internal/util.CompileDate=$(DATE)' -X github.com/zyedidia/micro/internal/util.Debug=OFF
 
 # Builds micro after checking dependencies but without updating the runtime
-build: update
-	go build -ldflags "-s -w -X main.Version=$(VERSION) -X main.CommitHash=$(HASH) -X 'main.CompileDate=$(DATE)' $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
+build:
+	go build -ldflags "-s -w $(GOVARS) $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
+
+build-dbg:
+	go build -ldflags "-s -w $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
 
 # Builds micro after building the runtime and checking dependencies
 build-all: runtime build
 
 # Builds micro without checking for dependencies
 build-quick:
-	go build -ldflags "-s -w -X main.Version=$(VERSION) -X main.CommitHash=$(HASH) -X 'main.CompileDate=$(DATE)' $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
+	go build -ldflags "-s -w $(GOVARS) $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
 
 # Same as 'build' but installs to $GOBIN afterward
-install: update
-	go install -ldflags "-s -w -X main.Version=$(VERSION) -X main.CommitHash=$(HASH) -X 'main.CompileDate=$(DATE)' $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
+install:
+	go install -ldflags "-s -w $(GOVARS) $(ADDITIONAL_GO_LINKER_FLAGS)" ./cmd/micro
 
 # Same as 'build-all' but installs to $GOBIN afterward
 install-all: runtime install
 
 # Same as 'build-quick' but installs to $GOBIN afterward
 install-quick:
-	go install -ldflags "-s -w -X main.Version=$(VERSION) -X main.CommitHash=$(HASH) -X 'main.CompileDate=$(DATE)' $(ADDITIONAL_GO_LINKER_FLAGS)"  ./cmd/micro
-
-update:
-	git pull
-	git submodule update --init
+	go install -ldflags "-s -w $(GOVARS) $(ADDITIONAL_GO_LINKER_FLAGS)"  ./cmd/micro
 
 # Builds the runtime
 runtime:
-	go get -u github.com/jteeuwen/go-bindata/...
-	$(GOBIN)/go-bindata -nometadata -o runtime.go runtime/...
-	mv runtime.go cmd/micro
+	git submodule update --init
+	go run runtime/syntax/make_headers.go runtime/syntax
+	go build -o tools/bindata ./tools/go-bindata
+	tools/bindata -pkg config -nomemcopy -nometadata -o runtime.go runtime/...
+	mv runtime.go internal/config
+	gofmt -w internal/config/runtime.go
 
 test:
-	go test ./cmd/micro
+	go test ./internal/...
 
 clean:
 	rm -f micro

README.md

@@ -17,7 +17,7 @@ Here is a picture of micro editing its source code.
 ![Screenshot](./assets/micro-solarized.png)
 
 To see more screenshots of micro, showcasing all of the default colorschemes, see [here](http://zbyedidia.webfactional.com/micro/screenshots.html).
-
+ 
 You can also check out the website for Micro at https://micro-editor.github.io.
 
 # Table of Contents
@@ -29,7 +29,7 @@ You can also check out the website for Micro at https://micro-editor.github.io.
   - [MacOS terminal](#macos-terminal)
   - [Linux clipboard support](#linux-clipboard-support)
   - [Colors and syntax highlighting](#colors-and-syntax-highlighting)
-  - [Plan9, Cygwin](#plan9-cygwin)
+  - [Plan9, Cygwin, Mingw](#plan9-cygwin-mingw)
 - [Usage](#usage)
 - [Documentation and Help](#documentation-and-help)
 - [Contributing](#contributing)
@@ -50,25 +50,20 @@ You can also check out the website for Micro at https://micro-editor.github.io.
 * Extremely good mouse support
     * This means mouse dragging to create a selection, double click to select by word, and triple click to select by line
 * Cross platform (It should work on all the platforms Go runs on)
-    * Note that while Windows is supported, there are still some bugs that need to be worked out
+    * Note that while Windows is supported Mingw/Cygwin is not (see below)
 * Plugin system (plugins are written in Lua)
-    * Micro has a built-in plugin manager to automatically install, remove, and update all your plugins
 * Persistent undo
 * Automatic linting and error notifications
-* Syntax highlighting (for over [90 languages](runtime/syntax)!)
+* Syntax highlighting (for over [120 languages](runtime/syntax)!)
 * Colorscheme support
     * By default, micro comes with 16, 256, and true color themes.
-* True color support (set the `MICRO_TRUECOLOR` env variable to 1 to enable it)
-* Snippets
-    * The snippet plugin can be installed with `> plugin install snippets`
+* True color support (set the `MICRO_TRUECOLOR` environment variable to 1 to enable it)
 * Copy and paste with the system clipboard
 * Small and simple
 * Easily configurable
 * Macros
 * Common editor things such as undo/redo, line numbers, Unicode support, softwrap...
 
-Although not yet implemented, I hope to add more features such as autocompletion ([#174](https://github.com/zyedidia/micro/issues/174)) or a tree view ([#249](https://github.com/zyedidia/micro/issues/249)) in the future.
-
 # Installation
 
 To install micro, you can download a [prebuilt binary](https://github.com/zyedidia/micro/releases), or you can build it from source.
@@ -106,52 +101,51 @@ You can install micro using Homebrew on Mac:
 brew install micro
 ```
 
-On Windows, you can install micro through [Chocolatey](https://chocolatey.org/) or [Scoop](https://github.com/lukesampson/scoop):
-
-```
-choco install micro
-```
-
-or
-
-```
-scoop install micro
-```
-
-On Linux, you can install micro through [snap](https://snapcraft.io/docs/core/install)
+On Debian Linux, you can install micro through [snap](https://snapcraft.io/docs/core/install)
 
 ```
 snap install micro --classic
 ```
 
-On OpenBSD, micro is available in the ports tree. It is also available as a binary package.
+Homebrew and snap are the two "officially" maintained package manager distributions of micro.
 
-```
-pkg_add -v micro
-```
+Micro is also available through other package managers on Linux such as AUR, Nix, and package managers
+for other operating systems:
+
+* Windows: [Chocolatey](https://chocolatey.org) and [Scoop](https://github.com/lukesampson/scoop)
+    * `choco install micro`
+    * `scoop install micro`
+* OpenBSD: Available in the ports tree and also available as a binary package
+    * `pkd_add -v micro`
 
 ### Building from source
 
 If your operating system does not have a binary release, but does run Go, you can build from source.
 
-Make sure that you have Go version 1.5 or greater (Go 1.4 will work if your version supports CGO) and that your `GOPATH` env variable is set (I recommend setting it to `~/go` if you don't have one).
+Make sure that you have Go version 1.11 or greater and Go modules are enabled.
 
 ```
-go get -d github.com/zyedidia/micro/cmd/micro
-cd $GOPATH/src/github.com/zyedidia/micro
-make install
+git clone https://github.com/zyedidia/micro
+cd micro
+make build
+sudo mv micro /usr/local/bin # optional
 ```
 
-The binary will then be installed to `$GOPATH/bin` (or your `$GOBIN`).
+The binary will be placed in the current directory and can be moved to
+anywhere you like (for example `/usr/local/bin`).
 
-Please make sure that when you are working with micro's code, you are working on your `GOPATH`.
+The command `make install` will install the binary to `$GOPATH/bin` or `$GOBIN`.
 
-You can install directly with `go get` (`go get -u github.com/zyedidia/micro/cmd/micro`) but this isn't recommended because it doesn't build micro with version information which is useful for the plugin manager.
+You can install directly with `go get` (`go get github.com/zyedidia/micro/cmd/micro`) but this isn't
+recommended because it doesn't build micro with version information, and doesn't disable debug mode.
 
 ### MacOS terminal
 
 If you are using MacOS, you should consider using [iTerm2](http://iterm2.com/) instead of the default Mac terminal. The iTerm2 terminal has much better mouse support as well as better handling of key events. For best keybinding behavior, choose `xterm defaults` under `Preferences->Profiles->Keys->Load Preset`. The newest versions also support true color.
 
+If you still insist on using the default Mac terminal, be sure to set `Use Option key as Meta key` under
+`Preferences->Profiles->Keyboard` to use <kbd>option</kbd> as <kbd>alt</kbd>.
+
 ### Linux clipboard support
 
 On Linux, clipboard support requires the 'xclip' or 'xsel' commands to be installed.
@@ -167,20 +161,23 @@ If you don't have xclip or xsel, micro will use an internal clipboard for copy a
 ### Colors and syntax highlighting
 
 If you open micro and it doesn't seem like syntax highlighting is working, this is probably because
-you are using a terminal which does not support 256 color. Try changing the colorscheme to `simple`
+you are using a terminal which does not support 256 colors. Try changing the colorscheme to `simple`
 by pressing CtrlE in micro and typing `set colorscheme simple`.
 
 If you are using the default Ubuntu terminal, to enable 256 make sure your `TERM` variable is set
 to `xterm-256color`.
 
-Many of the Windows terminals don't support more than 16 colors, which means
+Many older Windows terminals don't support more than 16 colors, which means
 that micro's default colorscheme won't look very good. You can either set
 the colorscheme to `simple`, or download a better terminal emulator, like
-mintty.
+mintty. However, if you are on a recent version of Windows 10, the default
+`cmd.exe` should do fine.
 
-### Plan9, Cygwin
+### Plan9, Cygwin, Mingw
 
-Please note that micro uses the amazing [tcell library](https://github.com/gdamore/tcell), but this
+These platforms are unfortunately not supported.
+
+Micro uses the amazing [tcell library](https://github.com/gdamore/tcell), but this
 means that micro is restricted to the platforms tcell supports. As a result, micro does not support
 Plan9, and Cygwin (although this may change in the future). Micro also doesn't support NaCl (but NaCl is deprecated anyways).
 

assets/packaging/micro.1

@@ -7,16 +7,13 @@
 .\" See \usr\share\doc\micro\LICENSE for more information.
 .TH micro 1 "2017-03-28"
 .SH NAME
-micro \- An intuitive and modern terminal text editor
-.
+micro \- A modern and intuitive terminal-based text editor
 .SH SYNOPSIS
 .B micro
-.RB []
-[
-.I "filename \&..."
-]
+.RB [OPTIONS]
+[FILE]\&...
+
 .SH DESCRIPTION
-( Copied from the README file. )
 
 Micro is a terminal-based text editor that aims to be easy to use and intuitive, while also taking advantage of the full capabilities
 of modern terminals. It comes as one single, batteries-included, static binary with no dependencies.
@@ -25,19 +22,39 @@ As the name indicates, micro aims to be somewhat of a successor to the nano edit
 enjoyable to use full time, whether you work in the terminal because you prefer it (like me), or because you need to (over ssh).
 
 .SH OPTIONS
-.B \-v --version
-Displays the current version of micro and the git commit hash. 
-.TP
-.SH ENVIRONMENT
-Micro's behaviour can be changed by setting environment variables, of which 
-there is currently only one:
-.I MICRO_TRUE_COLOR
+.PP
+\-config-dir dir
+.RS 4
+Specify a custom location for the configuration directory
+.RE
+.PP
+\-startpos LINE,COL
+.RS 4
+Specify a line and column to start the cursor at when opening a buffer
+.RE
+.PP
+\-options
+.RS 4
+Show all option help
+.RE
+.PP
+\-version
+.RS 4
+Show the version number and information
+.RE
 
-When MICRO_TRUE_COLOR is set to 1, micro will attempt to treat your terminal as
-a true-color terminal and will be able to make full use of the true-color colorschemes
-that are included with micro. If MICRO_TRUE_COLOR is not set or is set to 0, then
-micro will only make use of 256 color features and will internally map true-color
-colorschemes to the nearest colors available. For more information see micro's documentation.
+.SH CONFIGURATION
+
+Micro uses
+\fI$XDG_CONFIG_HOME/micro\fR
+for configuration by default. If it is not set, micro uses ~/.config/micro.
+Two main configuration files are settings.json, containing the user's
+settings, and bindings.json, containing the user's custom keybindings.
+
+.SH ENVIRONMENT
+Micro's behaviour can be changed by setting environment variables, of which there is currently only one:
+\fIMICRO_TRUECOLOR\fR.
+When MICRO_TRUECOLOR is set to 1, micro will attempt to treat your terminal as a true-color terminal and will be able to make full use of the true-color colorschemes that are included with micro. If MICRO_TRUECOLOR is not set or is set to 0, then micro will only make use of 256 color features and will internally map true-color colorschemes to the nearest colors available. For more information see micro's documentation.
 
 .SH NOTICE
 This manpage is intended only to serve as a quick guide to the invocation of 

cmd/micro/actions_other.go

@@ -1,9 +0,0 @@
-// +build plan9 nacl windows
-
-package main
-
-func (v *View) Suspend(usePlugin bool) bool {
-	messenger.Error("Suspend is only supported on Posix")
-
-	return false
-}

cmd/micro/autocomplete.go

@@ -1,249 +0,0 @@
-package main
-
-import (
-	"io/ioutil"
-	"os"
-	"strings"
-)
-
-var pluginCompletions []func(string) []string
-
-// This file is meant (for now) for autocompletion in command mode, not
-// while coding. This helps micro autocomplete commands and then filenames
-// for example with `vsplit filename`.
-
-// FileComplete autocompletes filenames
-func FileComplete(input string) (string, []string) {
-	var sep string = string(os.PathSeparator)
-	dirs := strings.Split(input, sep)
-
-	var files []os.FileInfo
-	var err error
-	if len(dirs) > 1 {
-		directories := strings.Join(dirs[:len(dirs)-1], sep) + sep
-
-		directories = ReplaceHome(directories)
-		files, err = ioutil.ReadDir(directories)
-	} else {
-		files, err = ioutil.ReadDir(".")
-	}
-
-	var suggestions []string
-	if err != nil {
-		return "", suggestions
-	}
-	for _, f := range files {
-		name := f.Name()
-		if f.IsDir() {
-			name += sep
-		}
-		if strings.HasPrefix(name, dirs[len(dirs)-1]) {
-			suggestions = append(suggestions, name)
-		}
-	}
-
-	var chosen string
-	if len(suggestions) == 1 {
-		if len(dirs) > 1 {
-			chosen = strings.Join(dirs[:len(dirs)-1], sep) + sep + suggestions[0]
-		} else {
-			chosen = suggestions[0]
-		}
-	} else {
-		if len(dirs) > 1 {
-			chosen = strings.Join(dirs[:len(dirs)-1], sep) + sep
-		}
-	}
-
-	return chosen, suggestions
-}
-
-// CommandComplete autocompletes commands
-func CommandComplete(input string) (string, []string) {
-	var suggestions []string
-	for cmd := range commands {
-		if strings.HasPrefix(cmd, input) {
-			suggestions = append(suggestions, cmd)
-		}
-	}
-
-	var chosen string
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return chosen, suggestions
-}
-
-// HelpComplete autocompletes help topics
-func HelpComplete(input string) (string, []string) {
-	var suggestions []string
-
-	for _, file := range ListRuntimeFiles(RTHelp) {
-		topic := file.Name()
-		if strings.HasPrefix(topic, input) {
-			suggestions = append(suggestions, topic)
-		}
-	}
-
-	var chosen string
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return chosen, suggestions
-}
-
-// ColorschemeComplete tab-completes names of colorschemes.
-func ColorschemeComplete(input string) (string, []string) {
-	var suggestions []string
-	files := ListRuntimeFiles(RTColorscheme)
-
-	for _, f := range files {
-		if strings.HasPrefix(f.Name(), input) {
-			suggestions = append(suggestions, f.Name())
-		}
-	}
-
-	var chosen string
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-
-	return chosen, suggestions
-}
-
-func contains(s []string, e string) bool {
-	for _, a := range s {
-		if a == e {
-			return true
-		}
-	}
-	return false
-}
-
-// OptionComplete autocompletes options
-func OptionComplete(input string) (string, []string) {
-	var suggestions []string
-	localSettings := DefaultLocalSettings()
-	for option := range globalSettings {
-		if strings.HasPrefix(option, input) {
-			suggestions = append(suggestions, option)
-		}
-	}
-	for option := range localSettings {
-		if strings.HasPrefix(option, input) && !contains(suggestions, option) {
-			suggestions = append(suggestions, option)
-		}
-	}
-
-	var chosen string
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return chosen, suggestions
-}
-
-// OptionValueComplete completes values for various options
-func OptionValueComplete(inputOpt, input string) (string, []string) {
-	inputOpt = strings.TrimSpace(inputOpt)
-	var suggestions []string
-	localSettings := DefaultLocalSettings()
-	var optionVal interface{}
-	for k, option := range globalSettings {
-		if k == inputOpt {
-			optionVal = option
-		}
-	}
-	for k, option := range localSettings {
-		if k == inputOpt {
-			optionVal = option
-		}
-	}
-
-	switch optionVal.(type) {
-	case bool:
-		if strings.HasPrefix("on", input) {
-			suggestions = append(suggestions, "on")
-		} else if strings.HasPrefix("true", input) {
-			suggestions = append(suggestions, "true")
-		}
-		if strings.HasPrefix("off", input) {
-			suggestions = append(suggestions, "off")
-		} else if strings.HasPrefix("false", input) {
-			suggestions = append(suggestions, "false")
-		}
-	case string:
-		switch inputOpt {
-		case "colorscheme":
-			_, suggestions = ColorschemeComplete(input)
-		case "fileformat":
-			if strings.HasPrefix("unix", input) {
-				suggestions = append(suggestions, "unix")
-			}
-			if strings.HasPrefix("dos", input) {
-				suggestions = append(suggestions, "dos")
-			}
-		case "sucmd":
-			if strings.HasPrefix("sudo", input) {
-				suggestions = append(suggestions, "sudo")
-			}
-			if strings.HasPrefix("doas", input) {
-				suggestions = append(suggestions, "doas")
-			}
-		}
-	}
-
-	var chosen string
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return chosen, suggestions
-}
-
-// MakeCompletion registers a function from a plugin for autocomplete commands
-func MakeCompletion(function string) Completion {
-	pluginCompletions = append(pluginCompletions, LuaFunctionComplete(function))
-	return Completion(-len(pluginCompletions))
-}
-
-// PluginComplete autocompletes from plugin function
-func PluginComplete(complete Completion, input string) (chosen string, suggestions []string) {
-	idx := int(-complete) - 1
-
-	if len(pluginCompletions) <= idx {
-		return "", nil
-	}
-	suggestions = pluginCompletions[idx](input)
-
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return
-}
-
-// PluginCmdComplete completes with possible choices for the `> plugin` command
-func PluginCmdComplete(input string) (chosen string, suggestions []string) {
-	for _, cmd := range []string{"install", "remove", "search", "update", "list"} {
-		if strings.HasPrefix(cmd, input) {
-			suggestions = append(suggestions, cmd)
-		}
-	}
-
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return chosen, suggestions
-}
-
-// PluginnameComplete completes with the names of loaded plugins
-func PluginNameComplete(input string) (chosen string, suggestions []string) {
-	for _, pp := range GetAllPluginPackages() {
-		if strings.HasPrefix(pp.Name, input) {
-			suggestions = append(suggestions, pp.Name)
-		}
-	}
-
-	if len(suggestions) == 1 {
-		chosen = suggestions[0]
-	}
-	return chosen, suggestions
-}

cmd/micro/bindings.go

@@ -1,607 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"io/ioutil"
-	"os"
-	"strings"
-	"unicode"
-
-	"github.com/flynn/json5"
-	"github.com/zyedidia/tcell"
-)
-
-var bindingsStr map[string]string
-var bindings map[Key][]func(*View, bool) bool
-var mouseBindings map[Key][]func(*View, bool, *tcell.EventMouse) bool
-var helpBinding string
-var kmenuBinding string
-
-var mouseBindingActions = map[string]func(*View, bool, *tcell.EventMouse) bool{
-	"MousePress":       (*View).MousePress,
-	"MouseMultiCursor": (*View).MouseMultiCursor,
-}
-
-var bindingActions = map[string]func(*View, bool) bool{
-	"CursorUp":              (*View).CursorUp,
-	"CursorDown":            (*View).CursorDown,
-	"CursorPageUp":          (*View).CursorPageUp,
-	"CursorPageDown":        (*View).CursorPageDown,
-	"CursorLeft":            (*View).CursorLeft,
-	"CursorRight":           (*View).CursorRight,
-	"CursorStart":           (*View).CursorStart,
-	"CursorEnd":             (*View).CursorEnd,
-	"SelectToStart":         (*View).SelectToStart,
-	"SelectToEnd":           (*View).SelectToEnd,
-	"SelectUp":              (*View).SelectUp,
-	"SelectDown":            (*View).SelectDown,
-	"SelectLeft":            (*View).SelectLeft,
-	"SelectRight":           (*View).SelectRight,
-	"WordRight":             (*View).WordRight,
-	"WordLeft":              (*View).WordLeft,
-	"SelectWordRight":       (*View).SelectWordRight,
-	"SelectWordLeft":        (*View).SelectWordLeft,
-	"DeleteWordRight":       (*View).DeleteWordRight,
-	"DeleteWordLeft":        (*View).DeleteWordLeft,
-	"SelectLine":            (*View).SelectLine,
-	"SelectToStartOfLine":   (*View).SelectToStartOfLine,
-	"SelectToEndOfLine":     (*View).SelectToEndOfLine,
-	"ParagraphPrevious":     (*View).ParagraphPrevious,
-	"ParagraphNext":         (*View).ParagraphNext,
-	"InsertNewline":         (*View).InsertNewline,
-	"InsertSpace":           (*View).InsertSpace,
-	"Backspace":             (*View).Backspace,
-	"Delete":                (*View).Delete,
-	"InsertTab":             (*View).InsertTab,
-	"Save":                  (*View).Save,
-	"SaveAll":               (*View).SaveAll,
-	"SaveAs":                (*View).SaveAs,
-	"Find":                  (*View).Find,
-	"FindNext":              (*View).FindNext,
-	"FindPrevious":          (*View).FindPrevious,
-	"Center":                (*View).Center,
-	"Undo":                  (*View).Undo,
-	"Redo":                  (*View).Redo,
-	"Copy":                  (*View).Copy,
-	"Cut":                   (*View).Cut,
-	"CutLine":               (*View).CutLine,
-	"DuplicateLine":         (*View).DuplicateLine,
-	"DeleteLine":            (*View).DeleteLine,
-	"MoveLinesUp":           (*View).MoveLinesUp,
-	"MoveLinesDown":         (*View).MoveLinesDown,
-	"IndentSelection":       (*View).IndentSelection,
-	"OutdentSelection":      (*View).OutdentSelection,
-	"OutdentLine":           (*View).OutdentLine,
-	"Paste":                 (*View).Paste,
-	"PastePrimary":          (*View).PastePrimary,
-	"SelectAll":             (*View).SelectAll,
-	"OpenFile":              (*View).OpenFile,
-	"Start":                 (*View).Start,
-	"End":                   (*View).End,
-	"PageUp":                (*View).PageUp,
-	"PageDown":              (*View).PageDown,
-	"HalfPageUp":            (*View).HalfPageUp,
-	"HalfPageDown":          (*View).HalfPageDown,
-	"StartOfLine":           (*View).StartOfLine,
-	"EndOfLine":             (*View).EndOfLine,
-	"ToggleHelp":            (*View).ToggleHelp,
-	"ToggleKeyMenu":         (*View).ToggleKeyMenu,
-	"ToggleRuler":           (*View).ToggleRuler,
-	"JumpLine":              (*View).JumpLine,
-	"ClearStatus":           (*View).ClearStatus,
-	"ShellMode":             (*View).ShellMode,
-	"CommandMode":           (*View).CommandMode,
-	"ToggleOverwriteMode":   (*View).ToggleOverwriteMode,
-	"Escape":                (*View).Escape,
-	"Quit":                  (*View).Quit,
-	"QuitAll":               (*View).QuitAll,
-	"AddTab":                (*View).AddTab,
-	"PreviousTab":           (*View).PreviousTab,
-	"NextTab":               (*View).NextTab,
-	"NextSplit":             (*View).NextSplit,
-	"PreviousSplit":         (*View).PreviousSplit,
-	"Unsplit":               (*View).Unsplit,
-	"VSplit":                (*View).VSplitBinding,
-	"HSplit":                (*View).HSplitBinding,
-	"ToggleMacro":           (*View).ToggleMacro,
-	"PlayMacro":             (*View).PlayMacro,
-	"Suspend":               (*View).Suspend,
-	"ScrollUp":              (*View).ScrollUpAction,
-	"ScrollDown":            (*View).ScrollDownAction,
-	"SpawnMultiCursor":      (*View).SpawnMultiCursor,
-	"RemoveMultiCursor":     (*View).RemoveMultiCursor,
-	"RemoveAllMultiCursors": (*View).RemoveAllMultiCursors,
-	"SkipMultiCursor":       (*View).SkipMultiCursor,
-	"JumpToMatchingBrace":   (*View).JumpToMatchingBrace,
-
-	// This was changed to InsertNewline but I don't want to break backwards compatibility
-	"InsertEnter": (*View).InsertNewline,
-}
-
-var bindingMouse = map[string]tcell.ButtonMask{
-	"MouseLeft":       tcell.Button1,
-	"MouseMiddle":     tcell.Button2,
-	"MouseRight":      tcell.Button3,
-	"MouseWheelUp":    tcell.WheelUp,
-	"MouseWheelDown":  tcell.WheelDown,
-	"MouseWheelLeft":  tcell.WheelLeft,
-	"MouseWheelRight": tcell.WheelRight,
-}
-
-var bindingKeys = map[string]tcell.Key{
-	"Up":             tcell.KeyUp,
-	"Down":           tcell.KeyDown,
-	"Right":          tcell.KeyRight,
-	"Left":           tcell.KeyLeft,
-	"UpLeft":         tcell.KeyUpLeft,
-	"UpRight":        tcell.KeyUpRight,
-	"DownLeft":       tcell.KeyDownLeft,
-	"DownRight":      tcell.KeyDownRight,
-	"Center":         tcell.KeyCenter,
-	"PageUp":         tcell.KeyPgUp,
-	"PageDown":       tcell.KeyPgDn,
-	"Home":           tcell.KeyHome,
-	"End":            tcell.KeyEnd,
-	"Insert":         tcell.KeyInsert,
-	"Delete":         tcell.KeyDelete,
-	"Help":           tcell.KeyHelp,
-	"Exit":           tcell.KeyExit,
-	"Clear":          tcell.KeyClear,
-	"Cancel":         tcell.KeyCancel,
-	"Print":          tcell.KeyPrint,
-	"Pause":          tcell.KeyPause,
-	"Backtab":        tcell.KeyBacktab,
-	"F1":             tcell.KeyF1,
-	"F2":             tcell.KeyF2,
-	"F3":             tcell.KeyF3,
-	"F4":             tcell.KeyF4,
-	"F5":             tcell.KeyF5,
-	"F6":             tcell.KeyF6,
-	"F7":             tcell.KeyF7,
-	"F8":             tcell.KeyF8,
-	"F9":             tcell.KeyF9,
-	"F10":            tcell.KeyF10,
-	"F11":            tcell.KeyF11,
-	"F12":            tcell.KeyF12,
-	"F13":            tcell.KeyF13,
-	"F14":            tcell.KeyF14,
-	"F15":            tcell.KeyF15,
-	"F16":            tcell.KeyF16,
-	"F17":            tcell.KeyF17,
-	"F18":            tcell.KeyF18,
-	"F19":            tcell.KeyF19,
-	"F20":            tcell.KeyF20,
-	"F21":            tcell.KeyF21,
-	"F22":            tcell.KeyF22,
-	"F23":            tcell.KeyF23,
-	"F24":            tcell.KeyF24,
-	"F25":            tcell.KeyF25,
-	"F26":            tcell.KeyF26,
-	"F27":            tcell.KeyF27,
-	"F28":            tcell.KeyF28,
-	"F29":            tcell.KeyF29,
-	"F30":            tcell.KeyF30,
-	"F31":            tcell.KeyF31,
-	"F32":            tcell.KeyF32,
-	"F33":            tcell.KeyF33,
-	"F34":            tcell.KeyF34,
-	"F35":            tcell.KeyF35,
-	"F36":            tcell.KeyF36,
-	"F37":            tcell.KeyF37,
-	"F38":            tcell.KeyF38,
-	"F39":            tcell.KeyF39,
-	"F40":            tcell.KeyF40,
-	"F41":            tcell.KeyF41,
-	"F42":            tcell.KeyF42,
-	"F43":            tcell.KeyF43,
-	"F44":            tcell.KeyF44,
-	"F45":            tcell.KeyF45,
-	"F46":            tcell.KeyF46,
-	"F47":            tcell.KeyF47,
-	"F48":            tcell.KeyF48,
-	"F49":            tcell.KeyF49,
-	"F50":            tcell.KeyF50,
-	"F51":            tcell.KeyF51,
-	"F52":            tcell.KeyF52,
-	"F53":            tcell.KeyF53,
-	"F54":            tcell.KeyF54,
-	"F55":            tcell.KeyF55,
-	"F56":            tcell.KeyF56,
-	"F57":            tcell.KeyF57,
-	"F58":            tcell.KeyF58,
-	"F59":            tcell.KeyF59,
-	"F60":            tcell.KeyF60,
-	"F61":            tcell.KeyF61,
-	"F62":            tcell.KeyF62,
-	"F63":            tcell.KeyF63,
-	"F64":            tcell.KeyF64,
-	"CtrlSpace":      tcell.KeyCtrlSpace,
-	"CtrlA":          tcell.KeyCtrlA,
-	"CtrlB":          tcell.KeyCtrlB,
-	"CtrlC":          tcell.KeyCtrlC,
-	"CtrlD":          tcell.KeyCtrlD,
-	"CtrlE":          tcell.KeyCtrlE,
-	"CtrlF":          tcell.KeyCtrlF,
-	"CtrlG":          tcell.KeyCtrlG,
-	"CtrlH":          tcell.KeyCtrlH,
-	"CtrlI":          tcell.KeyCtrlI,
-	"CtrlJ":          tcell.KeyCtrlJ,
-	"CtrlK":          tcell.KeyCtrlK,
-	"CtrlL":          tcell.KeyCtrlL,
-	"CtrlM":          tcell.KeyCtrlM,
-	"CtrlN":          tcell.KeyCtrlN,
-	"CtrlO":          tcell.KeyCtrlO,
-	"CtrlP":          tcell.KeyCtrlP,
-	"CtrlQ":          tcell.KeyCtrlQ,
-	"CtrlR":          tcell.KeyCtrlR,
-	"CtrlS":          tcell.KeyCtrlS,
-	"CtrlT":          tcell.KeyCtrlT,
-	"CtrlU":          tcell.KeyCtrlU,
-	"CtrlV":          tcell.KeyCtrlV,
-	"CtrlW":          tcell.KeyCtrlW,
-	"CtrlX":          tcell.KeyCtrlX,
-	"CtrlY":          tcell.KeyCtrlY,
-	"CtrlZ":          tcell.KeyCtrlZ,
-	"CtrlLeftSq":     tcell.KeyCtrlLeftSq,
-	"CtrlBackslash":  tcell.KeyCtrlBackslash,
-	"CtrlRightSq":    tcell.KeyCtrlRightSq,
-	"CtrlCarat":      tcell.KeyCtrlCarat,
-	"CtrlUnderscore": tcell.KeyCtrlUnderscore,
-	"CtrlPageUp":     tcell.KeyCtrlPgUp,
-	"CtrlPageDown":   tcell.KeyCtrlPgDn,
-	"Tab":            tcell.KeyTab,
-	"Esc":            tcell.KeyEsc,
-	"Escape":         tcell.KeyEscape,
-	"Enter":          tcell.KeyEnter,
-	"Backspace":      tcell.KeyBackspace2,
-
-	// I renamed these keys to PageUp and PageDown but I don't want to break someone's keybindings
-	"PgUp":   tcell.KeyPgUp,
-	"PgDown": tcell.KeyPgDn,
-}
-
-// The Key struct holds the data for a keypress (keycode + modifiers)
-type Key struct {
-	keyCode   tcell.Key
-	modifiers tcell.ModMask
-	buttons   tcell.ButtonMask
-	r         rune
-	escape    string
-}
-
-// InitBindings initializes the keybindings for micro
-func InitBindings() {
-	bindings = make(map[Key][]func(*View, bool) bool)
-	bindingsStr = make(map[string]string)
-	mouseBindings = make(map[Key][]func(*View, bool, *tcell.EventMouse) bool)
-
-	var parsed map[string]string
-	defaults := DefaultBindings()
-
-	filename := configDir + "/bindings.json"
-	if _, e := os.Stat(filename); e == nil {
-		input, err := ioutil.ReadFile(filename)
-		if err != nil {
-			TermMessage("Error reading bindings.json file: " + err.Error())
-			return
-		}
-
-		err = json5.Unmarshal(input, &parsed)
-		if err != nil {
-			TermMessage("Error reading bindings.json:", err.Error())
-		}
-	}
-
-	parseBindings(defaults)
-	parseBindings(parsed)
-}
-
-func parseBindings(userBindings map[string]string) {
-	for k, v := range userBindings {
-		BindKey(k, v)
-	}
-}
-
-// findKey will find binding Key 'b' using string 'k'
-func findKey(k string) (b Key, ok bool) {
-	modifiers := tcell.ModNone
-
-	// First, we'll strip off all the modifiers in the name and add them to the
-	// ModMask
-modSearch:
-	for {
-		switch {
-		case strings.HasPrefix(k, "-"):
-			// We optionally support dashes between modifiers
-			k = k[1:]
-		case strings.HasPrefix(k, "Ctrl") && k != "CtrlH":
-			// CtrlH technically does not have a 'Ctrl' modifier because it is really backspace
-			k = k[4:]
-			modifiers |= tcell.ModCtrl
-		case strings.HasPrefix(k, "Alt"):
-			k = k[3:]
-			modifiers |= tcell.ModAlt
-		case strings.HasPrefix(k, "Shift"):
-			k = k[5:]
-			modifiers |= tcell.ModShift
-		case strings.HasPrefix(k, "\x1b"):
-			return Key{
-				keyCode:   -1,
-				modifiers: modifiers,
-				buttons:   -1,
-				r:         0,
-				escape:    k,
-			}, true
-		default:
-			break modSearch
-		}
-	}
-
-	// Control is handled specially, since some character codes in bindingKeys
-	// are different when Control is depressed. We should check for Control keys
-	// first.
-	if modifiers&tcell.ModCtrl != 0 {
-		// see if the key is in bindingKeys with the Ctrl prefix.
-		k = string(unicode.ToUpper(rune(k[0]))) + k[1:]
-		if code, ok := bindingKeys["Ctrl"+k]; ok {
-			// It is, we're done.
-			return Key{
-				keyCode:   code,
-				modifiers: modifiers,
-				buttons:   -1,
-				r:         0,
-			}, true
-		}
-	}
-
-	// See if we can find the key in bindingKeys
-	if code, ok := bindingKeys[k]; ok {
-		return Key{
-			keyCode:   code,
-			modifiers: modifiers,
-			buttons:   -1,
-			r:         0,
-		}, true
-	}
-
-	// See if we can find the key in bindingMouse
-	if code, ok := bindingMouse[k]; ok {
-		return Key{
-			modifiers: modifiers,
-			buttons:   code,
-			r:         0,
-		}, true
-	}
-
-	// If we were given one character, then we've got a rune.
-	if len(k) == 1 {
-		return Key{
-			keyCode:   tcell.KeyRune,
-			modifiers: modifiers,
-			buttons:   -1,
-			r:         rune(k[0]),
-		}, true
-	}
-
-	// We don't know what happened.
-	return Key{buttons: -1}, false
-}
-
-// findAction will find 'action' using string 'v'
-func findAction(v string) (action func(*View, bool) bool) {
-	action, ok := bindingActions[v]
-	if !ok {
-		// If the user seems to be binding a function that doesn't exist
-		// We hope that it's a lua function that exists and bind it to that
-		action = LuaFunctionBinding(v)
-	}
-	return action
-}
-
-func findMouseAction(v string) func(*View, bool, *tcell.EventMouse) bool {
-	action, ok := mouseBindingActions[v]
-	if !ok {
-		// If the user seems to be binding a function that doesn't exist
-		// We hope that it's a lua function that exists and bind it to that
-		action = LuaFunctionMouseBinding(v)
-	}
-	return action
-}
-
-// TryBindKey tries to bind a key by writing to configDir/bindings.json
-// This function is unused for now
-func TryBindKey(k, v string) {
-	filename := configDir + "/bindings.json"
-	if _, e := os.Stat(filename); e == nil {
-		input, err := ioutil.ReadFile(filename)
-		if err != nil {
-			TermMessage("Error reading bindings.json file: " + err.Error())
-			return
-		}
-
-		conflict := -1
-		lines := strings.Split(string(input), "\n")
-		for i, l := range lines {
-			parts := strings.Split(l, ":")
-			if len(parts) >= 2 {
-				if strings.Contains(parts[0], k) {
-					conflict = i
-					TermMessage("Warning: Keybinding conflict:", k, " has been overwritten")
-				}
-			}
-		}
-
-		binding := fmt.Sprintf("    \"%s\": \"%s\",", k, v)
-		if conflict == -1 {
-			lines = append([]string{lines[0], binding}, lines[conflict:]...)
-		} else {
-			lines = append(append(lines[:conflict], binding), lines[conflict+1:]...)
-		}
-		txt := strings.Join(lines, "\n")
-		err = ioutil.WriteFile(filename, []byte(txt), 0644)
-		if err != nil {
-			TermMessage("Error")
-		}
-	}
-}
-
-// BindKey takes a key and an action and binds the two together
-func BindKey(k, v string) {
-	key, ok := findKey(k)
-	if !ok {
-		TermMessage("Unknown keybinding: " + k)
-		return
-	}
-	if v == "ToggleHelp" {
-		helpBinding = k
-	}
-	if v == "ToggleKeyMenu" {
-		kmenuBinding = k
-	}
-	if helpBinding == k && v != "ToggleHelp" {
-		helpBinding = ""
-	}
-	if kmenuBinding == k && v != "ToggleKeyMenu" {
-		kmenuBinding = ""
-	}
-
-	actionNames := strings.Split(v, ",")
-	if actionNames[0] == "UnbindKey" {
-		delete(bindings, key)
-		delete(mouseBindings, key)
-		delete(bindingsStr, k)
-		if len(actionNames) == 1 {
-			return
-		}
-		actionNames = append(actionNames[:0], actionNames[1:]...)
-	}
-	actions := make([]func(*View, bool) bool, 0, len(actionNames))
-	mouseActions := make([]func(*View, bool, *tcell.EventMouse) bool, 0, len(actionNames))
-	for _, actionName := range actionNames {
-		if strings.HasPrefix(actionName, "Mouse") {
-			mouseActions = append(mouseActions, findMouseAction(actionName))
-		} else if strings.HasPrefix(actionName, "command:") {
-			cmd := strings.SplitN(actionName, ":", 2)[1]
-			actions = append(actions, CommandAction(cmd))
-		} else if strings.HasPrefix(actionName, "command-edit:") {
-			cmd := strings.SplitN(actionName, ":", 2)[1]
-			actions = append(actions, CommandEditAction(cmd))
-		} else {
-			actions = append(actions, findAction(actionName))
-		}
-	}
-
-	if len(actions) > 0 {
-		// Can't have a binding be both mouse and normal
-		delete(mouseBindings, key)
-		bindings[key] = actions
-		bindingsStr[k] = v
-	} else if len(mouseActions) > 0 {
-		// Can't have a binding be both mouse and normal
-		delete(bindings, key)
-		mouseBindings[key] = mouseActions
-	}
-}
-
-// DefaultBindings returns a map containing micro's default keybindings
-func DefaultBindings() map[string]string {
-	return map[string]string{
-		"Up":             "CursorUp",
-		"Down":           "CursorDown",
-		"Right":          "CursorRight",
-		"Left":           "CursorLeft",
-		"ShiftUp":        "SelectUp",
-		"ShiftDown":      "SelectDown",
-		"ShiftLeft":      "SelectLeft",
-		"ShiftRight":     "SelectRight",
-		"AltLeft":        "WordLeft",
-		"AltRight":       "WordRight",
-		"AltUp":          "MoveLinesUp",
-		"AltDown":        "MoveLinesDown",
-		"AltShiftRight":  "SelectWordRight",
-		"AltShiftLeft":   "SelectWordLeft",
-		"CtrlLeft":       "StartOfLine",
-		"CtrlRight":      "EndOfLine",
-		"CtrlShiftLeft":  "SelectToStartOfLine",
-		"ShiftHome":      "SelectToStartOfLine",
-		"CtrlShiftRight": "SelectToEndOfLine",
-		"ShiftEnd":       "SelectToEndOfLine",
-		"CtrlUp":         "CursorStart",
-		"CtrlDown":       "CursorEnd",
-		"CtrlShiftUp":    "SelectToStart",
-		"CtrlShiftDown":  "SelectToEnd",
-		"Alt-{":          "ParagraphPrevious",
-		"Alt-}":          "ParagraphNext",
-		"Enter":          "InsertNewline",
-		"CtrlH":          "Backspace",
-		"Backspace":      "Backspace",
-		"Alt-CtrlH":      "DeleteWordLeft",
-		"Alt-Backspace":  "DeleteWordLeft",
-		"Tab":            "IndentSelection,InsertTab",
-		"Backtab":        "OutdentSelection,OutdentLine",
-		"CtrlO":          "OpenFile",
-		"CtrlS":          "Save",
-		"CtrlF":          "Find",
-		"CtrlN":          "FindNext",
-		"CtrlP":          "FindPrevious",
-		"CtrlZ":          "Undo",
-		"CtrlY":          "Redo",
-		"CtrlC":          "Copy",
-		"CtrlX":          "Cut",
-		"CtrlK":          "CutLine",
-		"CtrlD":          "DuplicateLine",
-		"CtrlV":          "Paste",
-		"CtrlA":          "SelectAll",
-		"CtrlT":          "AddTab",
-		"Alt,":           "PreviousTab",
-		"Alt.":           "NextTab",
-		"Home":           "StartOfLine",
-		"End":            "EndOfLine",
-		"CtrlHome":       "CursorStart",
-		"CtrlEnd":        "CursorEnd",
-		"PageUp":         "CursorPageUp",
-		"PageDown":       "CursorPageDown",
-		"CtrlPageUp":     "PreviousTab",
-		"CtrlPageDown":   "NextTab",
-		"CtrlG":          "ToggleHelp",
-		"Alt-g":          "ToggleKeyMenu",
-		"CtrlR":          "ToggleRuler",
-		"CtrlL":          "JumpLine",
-		"Delete":         "Delete",
-		"CtrlB":          "ShellMode",
-		"CtrlQ":          "Quit",
-		"CtrlE":          "CommandMode",
-		"CtrlW":          "NextSplit",
-		"CtrlU":          "ToggleMacro",
-		"CtrlJ":          "PlayMacro",
-		"Insert":         "ToggleOverwriteMode",
-
-		// Emacs-style keybindings
-		"Alt-f": "WordRight",
-		"Alt-b": "WordLeft",
-		"Alt-a": "StartOfLine",
-		"Alt-e": "EndOfLine",
-		// "Alt-p": "CursorUp",
-		// "Alt-n": "CursorDown",
-
-		// Integration with file managers
-		"F2":  "Save",
-		"F3":  "Find",
-		"F4":  "Quit",
-		"F7":  "Find",
-		"F10": "Quit",
-		"Esc": "Escape",
-
-		// Mouse bindings
-		"MouseWheelUp":   "ScrollUp",
-		"MouseWheelDown": "ScrollDown",
-		"MouseLeft":      "MousePress",
-		"MouseMiddle":    "PastePrimary",
-		"Ctrl-MouseLeft": "MouseMultiCursor",
-
-		"Alt-n": "SpawnMultiCursor",
-		"Alt-p": "RemoveMultiCursor",
-		"Alt-c": "RemoveAllMultiCursors",
-		"Alt-x": "SkipMultiCursor",
-	}
-}

cmd/micro/buffer.go

@@ -1,709 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"crypto/md5"
-	"encoding/gob"
-	"errors"
-	"io"
-	"io/ioutil"
-	"os"
-	"os/exec"
-	"os/signal"
-	"path/filepath"
-	"regexp"
-	"strconv"
-	"strings"
-	"time"
-	"unicode/utf8"
-
-	"github.com/zyedidia/micro/cmd/micro/highlight"
-)
-
-var (
-	// 0 - no line type detected
-	// 1 - lf detected
-	// 2 - crlf detected
-	fileformat = 0
-)
-
-// Buffer stores the text for files that are loaded into the text editor
-// It uses a rope to efficiently store the string and contains some
-// simple functions for saving and wrapper functions for modifying the rope
-type Buffer struct {
-	// The eventhandler for undo/redo
-	*EventHandler
-	// This stores all the text in the buffer as an array of lines
-	*LineArray
-
-	Cursor    Cursor
-	cursors   []*Cursor // for multiple cursors
-	curCursor int       // the current cursor
-
-	// Path to the file on disk
-	Path string
-	// Absolute path to the file on disk
-	AbsPath string
-	// Name of the buffer on the status line
-	name string
-
-	// Whether or not the buffer has been modified since it was opened
-	IsModified bool
-
-	// Stores the last modification time of the file the buffer is pointing to
-	ModTime time.Time
-
-	// NumLines is the number of lines in the buffer
-	NumLines int
-
-	syntaxDef   *highlight.Def
-	highlighter *highlight.Highlighter
-
-	// Hash of the original buffer -- empty if fastdirty is on
-	origHash [16]byte
-
-	// Buffer local settings
-	Settings map[string]interface{}
-}
-
-// The SerializedBuffer holds the types that get serialized when a buffer is saved
-// These are used for the savecursor and saveundo options
-type SerializedBuffer struct {
-	EventHandler *EventHandler
-	Cursor       Cursor
-	ModTime      time.Time
-}
-
-// NewBufferFromString creates a new buffer containing the given
-// string
-func NewBufferFromString(text, path string) *Buffer {
-	return NewBuffer(strings.NewReader(text), int64(len(text)), path)
-}
-
-// NewBuffer creates a new buffer from a given reader with a given path
-func NewBuffer(reader io.Reader, size int64, path string) *Buffer {
-	if path != "" {
-		for _, tab := range tabs {
-			for _, view := range tab.views {
-				if view.Buf.Path == path {
-					return view.Buf
-				}
-			}
-		}
-	}
-
-	b := new(Buffer)
-	b.LineArray = NewLineArray(size, reader)
-
-	b.Settings = DefaultLocalSettings()
-	for k, v := range globalSettings {
-		if _, ok := b.Settings[k]; ok {
-			b.Settings[k] = v
-		}
-	}
-
-	if fileformat == 1 {
-		b.Settings["fileformat"] = "unix"
-	} else if fileformat == 2 {
-		b.Settings["fileformat"] = "dos"
-	}
-
-	absPath, _ := filepath.Abs(path)
-
-	b.Path = path
-	b.AbsPath = absPath
-
-	// The last time this file was modified
-	b.ModTime, _ = GetModTime(b.Path)
-
-	b.EventHandler = NewEventHandler(b)
-
-	b.Update()
-	b.UpdateRules()
-
-	if _, err := os.Stat(configDir + "/buffers/"); os.IsNotExist(err) {
-		os.Mkdir(configDir+"/buffers/", os.ModePerm)
-	}
-
-	// Put the cursor at the first spot
-	cursorStartX := 0
-	cursorStartY := 0
-	// If -startpos LINE,COL was passed, use start position LINE,COL
-	if len(*flagStartPos) > 0 {
-		positions := strings.Split(*flagStartPos, ",")
-		if len(positions) == 2 {
-			lineNum, errPos1 := strconv.Atoi(positions[0])
-			colNum, errPos2 := strconv.Atoi(positions[1])
-			if errPos1 == nil && errPos2 == nil {
-				cursorStartX = colNum
-				cursorStartY = lineNum - 1
-				// Check to avoid line overflow
-				if cursorStartY > b.NumLines {
-					cursorStartY = b.NumLines - 1
-				} else if cursorStartY < 0 {
-					cursorStartY = 0
-				}
-				// Check to avoid column overflow
-				if cursorStartX > len(b.Line(cursorStartY)) {
-					cursorStartX = len(b.Line(cursorStartY))
-				} else if cursorStartX < 0 {
-					cursorStartX = 0
-				}
-			}
-		}
-	}
-	b.Cursor = Cursor{
-		Loc: Loc{
-			X: cursorStartX,
-			Y: cursorStartY,
-		},
-		buf: b,
-	}
-
-	InitLocalSettings(b)
-
-	if len(*flagStartPos) == 0 && (b.Settings["savecursor"].(bool) || b.Settings["saveundo"].(bool)) {
-		// If either savecursor or saveundo is turned on, we need to load the serialized information
-		// from ~/.config/micro/buffers
-		file, err := os.Open(configDir + "/buffers/" + EscapePath(b.AbsPath))
-		if err == nil {
-			var buffer SerializedBuffer
-			decoder := gob.NewDecoder(file)
-			gob.Register(TextEvent{})
-			err = decoder.Decode(&buffer)
-			if err != nil {
-				TermMessage(err.Error(), "\n", "You may want to remove the files in ~/.config/micro/buffers (these files store the information for the 'saveundo' and 'savecursor' options) if this problem persists.")
-			}
-			if b.Settings["savecursor"].(bool) {
-				b.Cursor = buffer.Cursor
-				b.Cursor.buf = b
-				b.Cursor.Relocate()
-			}
-
-			if b.Settings["saveundo"].(bool) {
-				// We should only use last time's eventhandler if the file wasn't modified by someone else in the meantime
-				if b.ModTime == buffer.ModTime {
-					b.EventHandler = buffer.EventHandler
-					b.EventHandler.buf = b
-				}
-			}
-		}
-		file.Close()
-	}
-
-	if !b.Settings["fastdirty"].(bool) {
-		if size > 50000 {
-			// If the file is larger than a megabyte fastdirty needs to be on
-			b.Settings["fastdirty"] = true
-		} else {
-			b.origHash = md5.Sum([]byte(b.String()))
-		}
-	}
-
-	b.cursors = []*Cursor{&b.Cursor}
-
-	return b
-}
-
-// GetName returns the name that should be displayed in the statusline
-// for this buffer
-func (b *Buffer) GetName() string {
-	if b.name == "" {
-		if b.Path == "" {
-			return "No name"
-		}
-		return b.Path
-	}
-	return b.name
-}
-
-// UpdateRules updates the syntax rules and filetype for this buffer
-// This is called when the colorscheme changes
-func (b *Buffer) UpdateRules() {
-	rehighlight := false
-	var files []*highlight.File
-	for _, f := range ListRuntimeFiles(RTSyntax) {
-		data, err := f.Data()
-		if err != nil {
-			TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
-		} else {
-			file, err := highlight.ParseFile(data)
-			if err != nil {
-				TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
-				continue
-			}
-			ftdetect, err := highlight.ParseFtDetect(file)
-			if err != nil {
-				TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
-				continue
-			}
-
-			ft := b.Settings["filetype"].(string)
-			if (ft == "Unknown" || ft == "") && !rehighlight {
-				if highlight.MatchFiletype(ftdetect, b.Path, b.lines[0].data) {
-					header := new(highlight.Header)
-					header.FileType = file.FileType
-					header.FtDetect = ftdetect
-					b.syntaxDef, err = highlight.ParseDef(file, header)
-					if err != nil {
-						TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
-						continue
-					}
-					rehighlight = true
-				}
-			} else {
-				if file.FileType == ft && !rehighlight {
-					header := new(highlight.Header)
-					header.FileType = file.FileType
-					header.FtDetect = ftdetect
-					b.syntaxDef, err = highlight.ParseDef(file, header)
-					if err != nil {
-						TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
-						continue
-					}
-					rehighlight = true
-				}
-			}
-			files = append(files, file)
-		}
-	}
-
-	if b.syntaxDef != nil {
-		highlight.ResolveIncludes(b.syntaxDef, files)
-	}
-
-	if b.highlighter == nil || rehighlight {
-		if b.syntaxDef != nil {
-			b.Settings["filetype"] = b.syntaxDef.FileType
-			b.highlighter = highlight.NewHighlighter(b.syntaxDef)
-			if b.Settings["syntax"].(bool) {
-				b.highlighter.HighlightStates(b)
-			}
-		}
-	}
-}
-
-// FileType returns the buffer's filetype
-func (b *Buffer) FileType() string {
-	return b.Settings["filetype"].(string)
-}
-
-// IndentString returns a string representing one level of indentation
-func (b *Buffer) IndentString() string {
-	if b.Settings["tabstospaces"].(bool) {
-		return Spaces(int(b.Settings["tabsize"].(float64)))
-	}
-	return "\t"
-}
-
-// CheckModTime makes sure that the file this buffer points to hasn't been updated
-// by an external program since it was last read
-// If it has, we ask the user if they would like to reload the file
-func (b *Buffer) CheckModTime() {
-	modTime, ok := GetModTime(b.Path)
-	if ok {
-		if modTime != b.ModTime {
-			choice, canceled := messenger.YesNoPrompt("The file has changed since it was last read. Reload file? (y,n)")
-			messenger.Reset()
-			messenger.Clear()
-			if !choice || canceled {
-				// Don't load new changes -- do nothing
-				b.ModTime, _ = GetModTime(b.Path)
-			} else {
-				// Load new changes
-				b.ReOpen()
-			}
-		}
-	}
-}
-
-// ReOpen reloads the current buffer from disk
-func (b *Buffer) ReOpen() {
-	data, err := ioutil.ReadFile(b.Path)
-	txt := string(data)
-
-	if err != nil {
-		messenger.Error(err.Error())
-		return
-	}
-	b.EventHandler.ApplyDiff(txt)
-
-	b.ModTime, _ = GetModTime(b.Path)
-	b.IsModified = false
-	b.Update()
-	b.Cursor.Relocate()
-}
-
-// Update fetches the string from the rope and updates the `text` and `lines` in the buffer
-func (b *Buffer) Update() {
-	b.NumLines = len(b.lines)
-}
-
-// MergeCursors merges any cursors that are at the same position
-// into one cursor
-func (b *Buffer) MergeCursors() {
-	var cursors []*Cursor
-	for i := 0; i < len(b.cursors); i++ {
-		c1 := b.cursors[i]
-		if c1 != nil {
-			for j := 0; j < len(b.cursors); j++ {
-				c2 := b.cursors[j]
-				if c2 != nil && i != j && c1.Loc == c2.Loc {
-					b.cursors[j] = nil
-				}
-			}
-			cursors = append(cursors, c1)
-		}
-	}
-
-	b.cursors = cursors
-
-	for i := range b.cursors {
-		b.cursors[i].Num = i
-	}
-
-	if b.curCursor >= len(b.cursors) {
-		b.curCursor = len(b.cursors) - 1
-	}
-}
-
-// UpdateCursors updates all the cursors indicies
-func (b *Buffer) UpdateCursors() {
-	for i, c := range b.cursors {
-		c.Num = i
-	}
-}
-
-// Save saves the buffer to its default path
-func (b *Buffer) Save() error {
-	return b.SaveAs(b.Path)
-}
-
-// SaveWithSudo saves the buffer to the default path with sudo
-func (b *Buffer) SaveWithSudo() error {
-	return b.SaveAsWithSudo(b.Path)
-}
-
-// Serialize serializes the buffer to configDir/buffers
-func (b *Buffer) Serialize() error {
-	if b.Settings["savecursor"].(bool) || b.Settings["saveundo"].(bool) {
-		file, err := os.Create(configDir + "/buffers/" + EscapePath(b.AbsPath))
-		if err == nil {
-			enc := gob.NewEncoder(file)
-			gob.Register(TextEvent{})
-			err = enc.Encode(SerializedBuffer{
-				b.EventHandler,
-				b.Cursor,
-				b.ModTime,
-			})
-		}
-		err = file.Close()
-		return err
-	}
-	return nil
-}
-
-// SaveAs saves the buffer to a specified path (filename), creating the file if it does not exist
-func (b *Buffer) SaveAs(filename string) error {
-	b.UpdateRules()
-	if b.Settings["rmtrailingws"].(bool) {
-		r, _ := regexp.Compile(`[ \t]+$`)
-		for lineNum, line := range b.Lines(0, b.NumLines) {
-			indices := r.FindStringIndex(line)
-			if indices == nil {
-				continue
-			}
-			startLoc := Loc{indices[0], lineNum}
-			b.deleteToEnd(startLoc)
-		}
-		b.Cursor.Relocate()
-	}
-	if b.Settings["eofnewline"].(bool) {
-		end := b.End()
-		if b.RuneAt(Loc{end.X - 1, end.Y}) != '\n' {
-			b.Insert(end, "\n")
-		}
-	}
-
-	defer func() {
-		b.ModTime, _ = GetModTime(filename)
-	}()
-
-	// Removes any tilde and replaces with the absolute path to home
-	var absFilename string = ReplaceHome(filename)
-
-	// Get the leading path to the file | "." is returned if there's no leading path provided
-	if dirname := filepath.Dir(absFilename); dirname != "." {
-		// Check if the parent dirs don't exist
-		if _, statErr := os.Stat(dirname); os.IsNotExist(statErr) {
-			// Prompt to make sure they want to create the dirs that are missing
-			if yes, canceled := messenger.YesNoPrompt("Parent folders \"" + dirname + "\" do not exist. Create them? (y,n)"); yes && !canceled {
-				// Create all leading dir(s) since they don't exist
-				if mkdirallErr := os.MkdirAll(dirname, os.ModePerm); mkdirallErr != nil {
-					// If there was an error creating the dirs
-					return mkdirallErr
-				}
-			} else {
-				// If they canceled the creation of leading dirs
-				return errors.New("Save aborted")
-			}
-		}
-	}
-
-	f, err := os.OpenFile(absFilename, os.O_WRONLY|os.O_CREATE, 0644)
-	if err != nil {
-		return err
-	}
-	if err := f.Truncate(0); err != nil {
-		return err
-	}
-	useCrlf := b.Settings["fileformat"] == "dos"
-	for i, l := range b.lines {
-		if _, err := f.Write(l.data); err != nil {
-			return err
-		}
-		if i != len(b.lines)-1 {
-			if useCrlf {
-				if _, err := f.Write([]byte{'\r', '\n'}); err != nil {
-					return err
-				}
-			} else {
-				if _, err := f.Write([]byte{'\n'}); err != nil {
-					return err
-				}
-			}
-		}
-	}
-
-	b.Path = filename
-	b.IsModified = false
-	return b.Serialize()
-}
-
-// SaveAsWithSudo is the same as SaveAs except it uses a neat trick
-// with tee to use sudo so the user doesn't have to reopen micro with sudo
-func (b *Buffer) SaveAsWithSudo(filename string) error {
-	b.UpdateRules()
-	b.Path = filename
-
-	// Shut down the screen because we're going to interact directly with the shell
-	screen.Fini()
-	screen = nil
-
-	// Set up everything for the command
-	cmd := exec.Command(globalSettings["sucmd"].(string), "tee", filename)
-	cmd.Stdin = bytes.NewBufferString(b.SaveString(b.Settings["fileformat"] == "dos"))
-
-	// This is a trap for Ctrl-C so that it doesn't kill micro
-	// Instead we trap Ctrl-C to kill the program we're running
-	c := make(chan os.Signal, 1)
-	signal.Notify(c, os.Interrupt)
-	go func() {
-		for range c {
-			cmd.Process.Kill()
-		}
-	}()
-
-	// Start the command
-	cmd.Start()
-	err := cmd.Wait()
-
-	// Start the screen back up
-	InitScreen()
-	if err == nil {
-		b.IsModified = false
-		b.ModTime, _ = GetModTime(filename)
-		b.Serialize()
-	}
-	return err
-}
-
-// Modified returns if this buffer has been modified since
-// being opened
-func (b *Buffer) Modified() bool {
-	if b.Settings["fastdirty"].(bool) {
-		return b.IsModified
-	}
-	return b.origHash != md5.Sum([]byte(b.String()))
-}
-
-func (b *Buffer) insert(pos Loc, value []byte) {
-	b.IsModified = true
-	b.LineArray.insert(pos, value)
-	b.Update()
-}
-func (b *Buffer) remove(start, end Loc) string {
-	b.IsModified = true
-	sub := b.LineArray.remove(start, end)
-	b.Update()
-	return sub
-}
-func (b *Buffer) deleteToEnd(start Loc) {
-	b.IsModified = true
-	b.LineArray.DeleteToEnd(start)
-	b.Update()
-}
-
-// Start returns the location of the first character in the buffer
-func (b *Buffer) Start() Loc {
-	return Loc{0, 0}
-}
-
-// End returns the location of the last character in the buffer
-func (b *Buffer) End() Loc {
-	return Loc{utf8.RuneCount(b.lines[b.NumLines-1].data), b.NumLines - 1}
-}
-
-// RuneAt returns the rune at a given location in the buffer
-func (b *Buffer) RuneAt(loc Loc) rune {
-	line := []rune(b.Line(loc.Y))
-	if len(line) > 0 {
-		return line[loc.X]
-	}
-	return '\n'
-}
-
-// Line returns a single line
-func (b *Buffer) Line(n int) string {
-	if n >= len(b.lines) {
-		return ""
-	}
-	return string(b.lines[n].data)
-}
-
-// LinesNum returns the number of lines in the buffer
-func (b *Buffer) LinesNum() int {
-	return len(b.lines)
-}
-
-// Lines returns an array of strings containing the lines from start to end
-func (b *Buffer) Lines(start, end int) []string {
-	lines := b.lines[start:end]
-	var slice []string
-	for _, line := range lines {
-		slice = append(slice, string(line.data))
-	}
-	return slice
-}
-
-// Len gives the length of the buffer
-func (b *Buffer) Len() int {
-	return Count(b.String())
-}
-
-// MoveLinesUp moves the range of lines up one row
-func (b *Buffer) MoveLinesUp(start int, end int) {
-	// 0 < start < end <= len(b.lines)
-	if start < 1 || start >= end || end > len(b.lines) {
-		return // what to do? FIXME
-	}
-	if end == len(b.lines) {
-		b.Insert(
-			Loc{
-				utf8.RuneCount(b.lines[end-1].data),
-				end - 1,
-			},
-			"\n"+b.Line(start-1),
-		)
-	} else {
-		b.Insert(
-			Loc{0, end},
-			b.Line(start-1)+"\n",
-		)
-	}
-	b.Remove(
-		Loc{0, start - 1},
-		Loc{0, start},
-	)
-}
-
-// MoveLinesDown moves the range of lines down one row
-func (b *Buffer) MoveLinesDown(start int, end int) {
-	// 0 <= start < end < len(b.lines)
-	// if end == len(b.lines), we can't do anything here because the
-	// last line is unaccessible, FIXME
-	if start < 0 || start >= end || end >= len(b.lines)-1 {
-		return // what to do? FIXME
-	}
-	b.Insert(
-		Loc{0, start},
-		b.Line(end)+"\n",
-	)
-	end++
-	b.Remove(
-		Loc{0, end},
-		Loc{0, end + 1},
-	)
-}
-
-// ClearMatches clears all of the syntax highlighting for this buffer
-func (b *Buffer) ClearMatches() {
-	for i := range b.lines {
-		b.SetMatch(i, nil)
-		b.SetState(i, nil)
-	}
-}
-
-func (b *Buffer) clearCursors() {
-	for i := 1; i < len(b.cursors); i++ {
-		b.cursors[i] = nil
-	}
-	b.cursors = b.cursors[:1]
-	b.UpdateCursors()
-	b.Cursor.ResetSelection()
-}
-
-var bracePairs = [][2]rune{
-	[2]rune{'(', ')'},
-	[2]rune{'{', '}'},
-	[2]rune{'[', ']'},
-}
-
-// FindMatchingBrace returns the location in the buffer of the matching bracket
-// It is given a brace type containing the open and closing character, (for example
-// '{' and '}') as well as the location to match from
-func (b *Buffer) FindMatchingBrace(braceType [2]rune, start Loc) Loc {
-	curLine := []rune(string(b.lines[start.Y].data))
-	startChar := curLine[start.X]
-	var i int
-	if startChar == braceType[0] {
-		for y := start.Y; y < b.NumLines; y++ {
-			l := []rune(string(b.lines[y].data))
-			xInit := 0
-			if y == start.Y {
-				xInit = start.X
-			}
-			for x := xInit; x < len(l); x++ {
-				r := l[x]
-				if r == braceType[0] {
-					i++
-				} else if r == braceType[1] {
-					i--
-					if i == 0 {
-						return Loc{x, y}
-					}
-				}
-			}
-		}
-	} else if startChar == braceType[1] {
-		for y := start.Y; y >= 0; y-- {
-			l := []rune(string(b.lines[y].data))
-			xInit := len(l) - 1
-			if y == start.Y {
-				xInit = start.X
-			}
-			for x := xInit; x >= 0; x-- {
-				r := l[x]
-				if r == braceType[0] {
-					i--
-					if i == 0 {
-						return Loc{x, y}
-					}
-				} else if r == braceType[1] {
-					i++
-				}
-			}
-		}
-	}
-	return start
-}

cmd/micro/cellview.go

@@ -1,229 +0,0 @@
-package main
-
-import (
-	"github.com/mattn/go-runewidth"
-	"github.com/zyedidia/tcell"
-)
-
-func min(a, b int) int {
-	if a <= b {
-		return a
-	}
-	return b
-}
-
-func visualToCharPos(visualIndex int, lineN int, str string, buf *Buffer, tabsize int) (int, int, *tcell.Style) {
-	charPos := 0
-	var lineIdx int
-	var lastWidth int
-	var style *tcell.Style
-	var width int
-	var rw int
-	for i, c := range str {
-		// width := StringWidth(str[:i], tabsize)
-
-		if group, ok := buf.Match(lineN)[charPos]; ok {
-			s := GetColor(group.String())
-			style = &s
-		}
-
-		if width >= visualIndex {
-			return charPos, visualIndex - lastWidth, style
-		}
-
-		if i != 0 {
-			charPos++
-			lineIdx += rw
-		}
-		lastWidth = width
-		rw = 0
-		if c == '\t' {
-			rw = tabsize - (lineIdx % tabsize)
-			width += rw
-		} else {
-			rw = runewidth.RuneWidth(c)
-			width += rw
-		}
-	}
-
-	return -1, -1, style
-}
-
-type Char struct {
-	visualLoc Loc
-	realLoc   Loc
-	char      rune
-	// The actual character that is drawn
-	// This is only different from char if it's for example hidden character
-	drawChar rune
-	style    tcell.Style
-	width    int
-}
-
-type CellView struct {
-	lines [][]*Char
-}
-
-func (c *CellView) Draw(buf *Buffer, top, height, left, width int) {
-	if width <= 0 {
-		return
-	}
-
-	matchingBrace := Loc{-1, -1}
-	// bracePairs is defined in buffer.go
-	if buf.Settings["matchbrace"].(bool) {
-		for _, bp := range bracePairs {
-			r := buf.Cursor.RuneUnder(buf.Cursor.X)
-			if r == bp[0] || r == bp[1] {
-				matchingBrace = buf.FindMatchingBrace(bp, buf.Cursor.Loc)
-			}
-		}
-	}
-
-	tabsize := int(buf.Settings["tabsize"].(float64))
-	softwrap := buf.Settings["softwrap"].(bool)
-	indentrunes := []rune(buf.Settings["indentchar"].(string))
-	// if empty indentchar settings, use space
-	if indentrunes == nil || len(indentrunes) == 0 {
-		indentrunes = []rune(" ")
-	}
-	indentchar := indentrunes[0]
-
-	start := buf.Cursor.Y
-	if buf.Settings["syntax"].(bool) && buf.syntaxDef != nil {
-		if start > 0 && buf.lines[start-1].rehighlight {
-			buf.highlighter.ReHighlightLine(buf, start-1)
-			buf.lines[start-1].rehighlight = false
-		}
-
-		buf.highlighter.ReHighlightStates(buf, start)
-
-		buf.highlighter.HighlightMatches(buf, top, top+height)
-	}
-
-	c.lines = make([][]*Char, 0)
-
-	viewLine := 0
-	lineN := top
-
-	curStyle := defStyle
-	for viewLine < height {
-		if lineN >= len(buf.lines) {
-			break
-		}
-
-		lineStr := buf.Line(lineN)
-		line := []rune(lineStr)
-
-		colN, startOffset, startStyle := visualToCharPos(left, lineN, lineStr, buf, tabsize)
-		if colN < 0 {
-			colN = len(line)
-		}
-		viewCol := -startOffset
-		if startStyle != nil {
-			curStyle = *startStyle
-		}
-
-		// We'll either draw the length of the line, or the width of the screen
-		// whichever is smaller
-		lineLength := min(StringWidth(lineStr, tabsize), width)
-		c.lines = append(c.lines, make([]*Char, lineLength))
-
-		wrap := false
-		// We only need to wrap if the length of the line is greater than the width of the terminal screen
-		if softwrap && StringWidth(lineStr, tabsize) > width {
-			wrap = true
-			// We're going to draw the entire line now
-			lineLength = StringWidth(lineStr, tabsize)
-		}
-
-		for viewCol < lineLength {
-			if colN >= len(line) {
-				break
-			}
-			if group, ok := buf.Match(lineN)[colN]; ok {
-				curStyle = GetColor(group.String())
-			}
-
-			char := line[colN]
-
-			if viewCol >= 0 {
-				st := curStyle
-				if colN == matchingBrace.X && lineN == matchingBrace.Y && !buf.Cursor.HasSelection() {
-					st = curStyle.Reverse(true)
-				}
-				if viewCol < len(c.lines[viewLine]) {
-					c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, char, st, 1}
-				}
-			}
-			if char == '\t' {
-				charWidth := tabsize - (viewCol+left)%tabsize
-				if viewCol >= 0 {
-					c.lines[viewLine][viewCol].drawChar = indentchar
-					c.lines[viewLine][viewCol].width = charWidth
-
-					indentStyle := curStyle
-					ch := buf.Settings["indentchar"].(string)
-					if group, ok := colorscheme["indent-char"]; ok && !IsStrWhitespace(ch) && ch != "" {
-						indentStyle = group
-					}
-
-					c.lines[viewLine][viewCol].style = indentStyle
-				}
-
-				for i := 1; i < charWidth; i++ {
-					viewCol++
-					if viewCol >= 0 && viewCol < lineLength && viewCol < len(c.lines[viewLine]) {
-						c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, ' ', curStyle, 1}
-					}
-				}
-				viewCol++
-			} else if runewidth.RuneWidth(char) > 1 {
-				charWidth := runewidth.RuneWidth(char)
-				if viewCol >= 0 {
-					c.lines[viewLine][viewCol].width = charWidth
-				}
-				for i := 1; i < charWidth; i++ {
-					viewCol++
-					if viewCol >= 0 && viewCol < lineLength && viewCol < len(c.lines[viewLine]) {
-						c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, ' ', curStyle, 1}
-					}
-				}
-				viewCol++
-			} else {
-				viewCol++
-			}
-			colN++
-
-			if wrap && viewCol >= width {
-				viewLine++
-
-				// If we go too far soft wrapping we have to cut off
-				if viewLine >= height {
-					break
-				}
-
-				nextLine := line[colN:]
-				lineLength := min(StringWidth(string(nextLine), tabsize), width)
-				c.lines = append(c.lines, make([]*Char, lineLength))
-
-				viewCol = 0
-			}
-
-		}
-		if group, ok := buf.Match(lineN)[len(line)]; ok {
-			curStyle = GetColor(group.String())
-		}
-
-		// newline
-		viewLine++
-		lineN++
-	}
-
-	for i := top; i < top+height; i++ {
-		if i >= buf.NumLines {
-			break
-		}
-		buf.SetMatch(i, nil)
-	}
-}

cmd/micro/clean.go

@@ -0,0 +1,143 @@
+package main
+
+import (
+	"bufio"
+	"encoding/gob"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+)
+
+func shouldContinue() bool {
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Print("Continue [Y/n]: ")
+	text, err := reader.ReadString('\n')
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+
+	if len(text) <= 1 {
+		// default continue
+		return true
+	}
+
+	return strings.ToLower(text)[0] == 'y'
+}
+
+// CleanConfig performs cleanup in the user's configuration directory
+func CleanConfig() {
+	fmt.Println("Cleaning your configuration directory at", config.ConfigDir)
+	fmt.Printf("Please consider backing up %s before continuing\n", config.ConfigDir)
+
+	if !shouldContinue() {
+		fmt.Println("Stopping early")
+		return
+	}
+
+	// detect unused options
+	var unusedOptions []string
+	defaultSettings := config.DefaultAllSettings()
+	for k := range config.GlobalSettings {
+		if _, ok := defaultSettings[k]; !ok {
+			valid := false
+			for _, p := range config.Plugins {
+				if strings.HasPrefix(k, p.Name+".") || k == p.Name {
+					valid = true
+				}
+			}
+			if !valid {
+				unusedOptions = append(unusedOptions, k)
+			}
+		}
+	}
+
+	if len(unusedOptions) > 0 {
+		fmt.Println("The following options are unused:")
+
+		sort.Strings(unusedOptions)
+
+		for _, s := range unusedOptions {
+			fmt.Printf("%s (value: %v)\n", s, config.GlobalSettings[s])
+		}
+
+		fmt.Printf("These options will be removed from %s\n", filepath.Join(config.ConfigDir, "settings.json"))
+
+		if shouldContinue() {
+			for _, s := range unusedOptions {
+				delete(config.GlobalSettings, s)
+			}
+
+			err := config.OverwriteSettings(filepath.Join(config.ConfigDir, "settings.json"))
+			if err != nil {
+				fmt.Println("Error writing settings.json file: " + err.Error())
+			}
+
+			fmt.Println("Removed unused options")
+			fmt.Print("\n\n")
+		}
+	}
+
+	// detect incorrectly formatted buffer/ files
+	files, err := ioutil.ReadDir(filepath.Join(config.ConfigDir, "buffers"))
+	if err == nil {
+		var badFiles []string
+		var buffer buffer.SerializedBuffer
+		for _, f := range files {
+			fname := filepath.Join(config.ConfigDir, "buffers", f.Name())
+			file, e := os.Open(fname)
+
+			if e == nil {
+				defer file.Close()
+
+				decoder := gob.NewDecoder(file)
+				err = decoder.Decode(&buffer)
+
+				if err != nil && f.Name() != "history" {
+					badFiles = append(badFiles, fname)
+				}
+			}
+		}
+
+		if len(badFiles) > 0 {
+			fmt.Printf("Detected %d files with an invalid format in %s\n", len(badFiles), filepath.Join(config.ConfigDir, "buffers"))
+			fmt.Println("These files store cursor and undo history.")
+			fmt.Printf("Removing badly formatted files in %s\n", filepath.Join(config.ConfigDir, "buffers"))
+
+			if shouldContinue() {
+				for _, f := range badFiles {
+					err := os.Remove(f)
+					if err != nil {
+						fmt.Println(err)
+						continue
+					}
+				}
+
+				fmt.Println("Removed badly formatted files")
+				fmt.Print("\n\n")
+			}
+		}
+	}
+
+	// detect plugins/ directory
+	plugins := filepath.Join(config.ConfigDir, "plugins")
+	if stat, err := os.Stat(plugins); err == nil && stat.IsDir() {
+		fmt.Printf("Found directory %s\n", plugins)
+		fmt.Printf("Plugins should now be stored in %s\n", filepath.Join(config.ConfigDir, "plug"))
+		fmt.Printf("Removing %s\n", plugins)
+
+		if shouldContinue() {
+			os.RemoveAll(plugins)
+		}
+
+		fmt.Print("\n\n")
+	}
+
+	fmt.Println("Done cleaning")
+}

cmd/micro/command.go

@@ -1,738 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"regexp"
-	"runtime"
-	"strconv"
-	"strings"
-
-	humanize "github.com/dustin/go-humanize"
-	"github.com/zyedidia/micro/cmd/micro/shellwords"
-)
-
-// A Command contains a action (a function to call) as well as information about how to autocomplete the command
-type Command struct {
-	action      func([]string)
-	completions []Completion
-}
-
-// A StrCommand is similar to a command but keeps the name of the action
-type StrCommand struct {
-	action      string
-	completions []Completion
-}
-
-var commands map[string]Command
-
-var commandActions map[string]func([]string)
-
-func init() {
-	commandActions = map[string]func([]string){
-		"Set":        Set,
-		"SetLocal":   SetLocal,
-		"Show":       Show,
-		"ShowKey":    ShowKey,
-		"Run":        Run,
-		"Bind":       Bind,
-		"Quit":       Quit,
-		"Save":       Save,
-		"Replace":    Replace,
-		"ReplaceAll": ReplaceAll,
-		"VSplit":     VSplit,
-		"HSplit":     HSplit,
-		"Tab":        NewTab,
-		"Help":       Help,
-		"Eval":       Eval,
-		"ToggleLog":  ToggleLog,
-		"Plugin":     PluginCmd,
-		"Reload":     Reload,
-		"Cd":         Cd,
-		"Pwd":        Pwd,
-		"Open":       Open,
-		"TabSwitch":  TabSwitch,
-		"Term":       Term,
-		"MemUsage":   MemUsage,
-		"Retab":      Retab,
-		"Raw":        Raw,
-	}
-}
-
-// InitCommands initializes the default commands
-func InitCommands() {
-	commands = make(map[string]Command)
-
-	defaults := DefaultCommands()
-	parseCommands(defaults)
-}
-
-func parseCommands(userCommands map[string]StrCommand) {
-	for k, v := range userCommands {
-		MakeCommand(k, v.action, v.completions...)
-	}
-}
-
-// MakeCommand is a function to easily create new commands
-// This can be called by plugins in Lua so that plugins can define their own commands
-func MakeCommand(name, function string, completions ...Completion) {
-	action := commandActions[function]
-	if _, ok := commandActions[function]; !ok {
-		// If the user seems to be binding a function that doesn't exist
-		// We hope that it's a lua function that exists and bind it to that
-		action = LuaFunctionCommand(function)
-	}
-
-	commands[name] = Command{action, completions}
-}
-
-// DefaultCommands returns a map containing micro's default commands
-func DefaultCommands() map[string]StrCommand {
-	return map[string]StrCommand{
-		"set":        {"Set", []Completion{OptionCompletion, OptionValueCompletion}},
-		"setlocal":   {"SetLocal", []Completion{OptionCompletion, OptionValueCompletion}},
-		"show":       {"Show", []Completion{OptionCompletion, NoCompletion}},
-		"showkey":    {"ShowKey", []Completion{NoCompletion}},
-		"bind":       {"Bind", []Completion{NoCompletion}},
-		"run":        {"Run", []Completion{NoCompletion}},
-		"quit":       {"Quit", []Completion{NoCompletion}},
-		"save":       {"Save", []Completion{NoCompletion}},
-		"replace":    {"Replace", []Completion{NoCompletion}},
-		"replaceall": {"ReplaceAll", []Completion{NoCompletion}},
-		"vsplit":     {"VSplit", []Completion{FileCompletion, NoCompletion}},
-		"hsplit":     {"HSplit", []Completion{FileCompletion, NoCompletion}},
-		"tab":        {"Tab", []Completion{FileCompletion, NoCompletion}},
-		"help":       {"Help", []Completion{HelpCompletion, NoCompletion}},
-		"eval":       {"Eval", []Completion{NoCompletion}},
-		"log":        {"ToggleLog", []Completion{NoCompletion}},
-		"plugin":     {"Plugin", []Completion{PluginCmdCompletion, PluginNameCompletion}},
-		"reload":     {"Reload", []Completion{NoCompletion}},
-		"cd":         {"Cd", []Completion{FileCompletion}},
-		"pwd":        {"Pwd", []Completion{NoCompletion}},
-		"open":       {"Open", []Completion{FileCompletion}},
-		"tabswitch":  {"TabSwitch", []Completion{NoCompletion}},
-		"term":       {"Term", []Completion{NoCompletion}},
-		"memusage":   {"MemUsage", []Completion{NoCompletion}},
-		"retab":      {"Retab", []Completion{NoCompletion}},
-		"raw":        {"Raw", []Completion{NoCompletion}},
-	}
-}
-
-// CommandEditAction returns a bindable function that opens a prompt with
-// the given string and executes the command when the user presses
-// enter
-func CommandEditAction(prompt string) func(*View, bool) bool {
-	return func(v *View, usePlugin bool) bool {
-		input, canceled := messenger.Prompt("> ", prompt, "Command", CommandCompletion)
-		if !canceled {
-			HandleCommand(input)
-		}
-		return false
-	}
-}
-
-// CommandAction returns a bindable function which executes the
-// given command
-func CommandAction(cmd string) func(*View, bool) bool {
-	return func(v *View, usePlugin bool) bool {
-		HandleCommand(cmd)
-		return false
-	}
-}
-
-// PluginCmd installs, removes, updates, lists, or searches for given plugins
-func PluginCmd(args []string) {
-	if len(args) >= 1 {
-		switch args[0] {
-		case "install":
-			installedVersions := GetInstalledVersions(false)
-			for _, plugin := range args[1:] {
-				pp := GetAllPluginPackages().Get(plugin)
-				if pp == nil {
-					messenger.Error("Unknown plugin \"" + plugin + "\"")
-				} else if err := pp.IsInstallable(); err != nil {
-					messenger.Error("Error installing ", plugin, ": ", err)
-				} else {
-					for _, installed := range installedVersions {
-						if pp.Name == installed.pack.Name {
-							if pp.Versions[0].Version.Compare(installed.Version) == 1 {
-								messenger.Error(pp.Name, " is already installed but out-of-date: use 'plugin update ", pp.Name, "' to update")
-							} else {
-								messenger.Error(pp.Name, " is already installed")
-							}
-						}
-					}
-					pp.Install()
-				}
-			}
-		case "remove":
-			removed := ""
-			for _, plugin := range args[1:] {
-				// check if the plugin exists.
-				if _, ok := loadedPlugins[plugin]; ok {
-					UninstallPlugin(plugin)
-					removed += plugin + " "
-					continue
-				}
-			}
-			if !IsSpaces(removed) {
-				messenger.Message("Removed ", removed)
-			} else {
-				messenger.Error("The requested plugins do not exist")
-			}
-		case "update":
-			UpdatePlugins(args[1:])
-		case "list":
-			plugins := GetInstalledVersions(false)
-			messenger.AddLog("----------------")
-			messenger.AddLog("The following plugins are currently installed:\n")
-			for _, p := range plugins {
-				messenger.AddLog(fmt.Sprintf("%s (%s)", p.pack.Name, p.Version))
-			}
-			messenger.AddLog("----------------")
-			if len(plugins) > 0 {
-				if CurView().Type != vtLog {
-					ToggleLog([]string{})
-				}
-			}
-		case "search":
-			plugins := SearchPlugin(args[1:])
-			messenger.Message(len(plugins), " plugins found")
-			for _, p := range plugins {
-				messenger.AddLog("----------------")
-				messenger.AddLog(p.String())
-			}
-			messenger.AddLog("----------------")
-			if len(plugins) > 0 {
-				if CurView().Type != vtLog {
-					ToggleLog([]string{})
-				}
-			}
-		case "available":
-			packages := GetAllPluginPackages()
-			messenger.AddLog("Available Plugins:")
-			for _, pkg := range packages {
-				messenger.AddLog(pkg.Name)
-			}
-			if CurView().Type != vtLog {
-				ToggleLog([]string{})
-			}
-		}
-	} else {
-		messenger.Error("Not enough arguments")
-	}
-}
-
-// Retab changes all spaces to tabs or all tabs to spaces
-// depending on the user's settings
-func Retab(args []string) {
-	CurView().Retab(true)
-}
-
-// Raw opens a new raw view which displays the escape sequences micro
-// is receiving in real-time
-func Raw(args []string) {
-	buf := NewBufferFromString("", "Raw events")
-
-	view := NewView(buf)
-	view.Buf.Insert(view.Cursor.Loc, "Warning: Showing raw event escape codes\n")
-	view.Buf.Insert(view.Cursor.Loc, "Use CtrlQ to exit\n")
-	view.Type = vtRaw
-	tab := NewTabFromView(view)
-	tab.SetNum(len(tabs))
-	tabs = append(tabs, tab)
-	curTab = len(tabs) - 1
-	if len(tabs) == 2 {
-		for _, t := range tabs {
-			for _, v := range t.views {
-				v.ToggleTabbar()
-			}
-		}
-	}
-}
-
-// TabSwitch switches to a given tab either by name or by number
-func TabSwitch(args []string) {
-	if len(args) > 0 {
-		num, err := strconv.Atoi(args[0])
-		if err != nil {
-			// Check for tab with this name
-
-			found := false
-			for _, t := range tabs {
-				v := t.views[t.CurView]
-				if v.Buf.GetName() == args[0] {
-					curTab = v.TabNum
-					found = true
-				}
-			}
-			if !found {
-				messenger.Error("Could not find tab: ", err)
-			}
-		} else {
-			num--
-			if num >= 0 && num < len(tabs) {
-				curTab = num
-			} else {
-				messenger.Error("Invalid tab index")
-			}
-		}
-	}
-}
-
-// Cd changes the current working directory
-func Cd(args []string) {
-	if len(args) > 0 {
-		path := ReplaceHome(args[0])
-		err := os.Chdir(path)
-		if err != nil {
-			messenger.Error("Error with cd: ", err)
-			return
-		}
-		wd, _ := os.Getwd()
-		for _, tab := range tabs {
-			for _, view := range tab.views {
-				if len(view.Buf.name) == 0 {
-					continue
-				}
-
-				view.Buf.Path, _ = MakeRelative(view.Buf.AbsPath, wd)
-				if p, _ := filepath.Abs(view.Buf.Path); !strings.Contains(p, wd) {
-					view.Buf.Path = view.Buf.AbsPath
-				}
-			}
-		}
-	}
-}
-
-// MemUsage prints micro's memory usage
-// Alloc shows how many bytes are currently in use
-// Sys shows how many bytes have been requested from the operating system
-// NumGC shows how many times the GC has been run
-// Note that Go commonly reserves more memory from the OS than is currently in-use/required
-// Additionally, even if Go returns memory to the OS, the OS does not always claim it because
-// there may be plenty of memory to spare
-func MemUsage(args []string) {
-	var mem runtime.MemStats
-	runtime.ReadMemStats(&mem)
-
-	messenger.Message(fmt.Sprintf("Alloc: %v, Sys: %v, NumGC: %v", humanize.Bytes(mem.Alloc), humanize.Bytes(mem.Sys), mem.NumGC))
-}
-
-// Pwd prints the current working directory
-func Pwd(args []string) {
-	wd, err := os.Getwd()
-	if err != nil {
-		messenger.Message(err.Error())
-	} else {
-		messenger.Message(wd)
-	}
-}
-
-// Open opens a new buffer with a given filename
-func Open(args []string) {
-	if len(args) > 0 {
-		filename := args[0]
-		// the filename might or might not be quoted, so unquote first then join the strings.
-		args, err := shellwords.Split(filename)
-		if err != nil {
-			messenger.Error("Error parsing args ", err)
-			return
-		}
-		filename = strings.Join(args, " ")
-
-		CurView().Open(filename)
-	} else {
-		messenger.Error("No filename")
-	}
-}
-
-// ToggleLog toggles the log view
-func ToggleLog(args []string) {
-	buffer := messenger.getBuffer()
-	if CurView().Type != vtLog {
-		CurView().HSplit(buffer)
-		CurView().Type = vtLog
-		RedrawAll()
-		buffer.Cursor.Loc = buffer.Start()
-		CurView().Relocate()
-		buffer.Cursor.Loc = buffer.End()
-		CurView().Relocate()
-	} else {
-		CurView().Quit(true)
-	}
-}
-
-// Reload reloads all files (syntax files, colorschemes...)
-func Reload(args []string) {
-	LoadAll()
-}
-
-// Help tries to open the given help page in a horizontal split
-func Help(args []string) {
-	if len(args) < 1 {
-		// Open the default help if the user just typed "> help"
-		CurView().openHelp("help")
-	} else {
-		helpPage := args[0]
-		if FindRuntimeFile(RTHelp, helpPage) != nil {
-			CurView().openHelp(helpPage)
-		} else {
-			messenger.Error("Sorry, no help for ", helpPage)
-		}
-	}
-}
-
-// VSplit opens a vertical split with file given in the first argument
-// If no file is given, it opens an empty buffer in a new split
-func VSplit(args []string) {
-	if len(args) == 0 {
-		CurView().VSplit(NewBufferFromString("", ""))
-	} else {
-		filename := args[0]
-		filename = ReplaceHome(filename)
-		file, err := os.Open(filename)
-		fileInfo, _ := os.Stat(filename)
-
-		if err == nil && fileInfo.IsDir() {
-			messenger.Error(filename, " is a directory")
-			return
-		}
-
-		defer file.Close()
-
-		var buf *Buffer
-		if err != nil {
-			// File does not exist -- create an empty buffer with that name
-			buf = NewBufferFromString("", filename)
-		} else {
-			buf = NewBuffer(file, FSize(file), filename)
-		}
-		CurView().VSplit(buf)
-	}
-}
-
-// HSplit opens a horizontal split with file given in the first argument
-// If no file is given, it opens an empty buffer in a new split
-func HSplit(args []string) {
-	if len(args) == 0 {
-		CurView().HSplit(NewBufferFromString("", ""))
-	} else {
-		filename := args[0]
-		filename = ReplaceHome(filename)
-		file, err := os.Open(filename)
-		fileInfo, _ := os.Stat(filename)
-
-		if err == nil && fileInfo.IsDir() {
-			messenger.Error(filename, " is a directory")
-			return
-		}
-
-		defer file.Close()
-
-		var buf *Buffer
-		if err != nil {
-			// File does not exist -- create an empty buffer with that name
-			buf = NewBufferFromString("", filename)
-		} else {
-			buf = NewBuffer(file, FSize(file), filename)
-		}
-		CurView().HSplit(buf)
-	}
-}
-
-// Eval evaluates a lua expression
-func Eval(args []string) {
-	if len(args) >= 1 {
-		err := L.DoString(args[0])
-		if err != nil {
-			messenger.Error(err)
-		}
-	} else {
-		messenger.Error("Not enough arguments")
-	}
-}
-
-// NewTab opens the given file in a new tab
-func NewTab(args []string) {
-	if len(args) == 0 {
-		CurView().AddTab(true)
-	} else {
-		filename := args[0]
-		filename = ReplaceHome(filename)
-		file, err := os.Open(filename)
-		fileInfo, _ := os.Stat(filename)
-
-		if err == nil && fileInfo.IsDir() {
-			messenger.Error(filename, " is a directory")
-			return
-		}
-
-		defer file.Close()
-
-		var buf *Buffer
-		if err != nil {
-			buf = NewBufferFromString("", filename)
-		} else {
-			buf = NewBuffer(file, FSize(file), filename)
-		}
-
-		tab := NewTabFromView(NewView(buf))
-		tab.SetNum(len(tabs))
-		tabs = append(tabs, tab)
-		curTab = len(tabs) - 1
-		if len(tabs) == 2 {
-			for _, t := range tabs {
-				for _, v := range t.views {
-					v.ToggleTabbar()
-				}
-			}
-		}
-	}
-}
-
-// Set sets an option
-func Set(args []string) {
-	if len(args) < 2 {
-		messenger.Error("Not enough arguments")
-		return
-	}
-
-	option := args[0]
-	value := args[1]
-
-	SetOptionAndSettings(option, value)
-}
-
-// SetLocal sets an option local to the buffer
-func SetLocal(args []string) {
-	if len(args) < 2 {
-		messenger.Error("Not enough arguments")
-		return
-	}
-
-	option := args[0]
-	value := args[1]
-
-	err := SetLocalOption(option, value, CurView())
-	if err != nil {
-		messenger.Error(err.Error())
-	}
-}
-
-// Show shows the value of the given option
-func Show(args []string) {
-	if len(args) < 1 {
-		messenger.Error("Please provide an option to show")
-		return
-	}
-
-	option := GetOption(args[0])
-
-	if option == nil {
-		messenger.Error(args[0], " is not a valid option")
-		return
-	}
-
-	messenger.Message(option)
-}
-
-// ShowKey displays the action that a key is bound to
-func ShowKey(args []string) {
-	if len(args) < 1 {
-		messenger.Error("Please provide a key to show")
-		return
-	}
-
-	if action, ok := bindingsStr[args[0]]; ok {
-		messenger.Message(action)
-	} else {
-		messenger.Message(args[0], " has no binding")
-	}
-}
-
-// Bind creates a new keybinding
-func Bind(args []string) {
-	if len(args) < 2 {
-		messenger.Error("Not enough arguments")
-		return
-	}
-	BindKey(args[0], args[1])
-}
-
-// Run runs a shell command in the background
-func Run(args []string) {
-	// Run a shell command in the background (openTerm is false)
-	HandleShellCommand(shellwords.Join(args...), false, true)
-}
-
-// Quit closes the main view
-func Quit(args []string) {
-	// Close the main view
-	CurView().Quit(true)
-}
-
-// Save saves the buffer in the main view
-func Save(args []string) {
-	if len(args) == 0 {
-		// Save the main view
-		CurView().Save(true)
-	} else {
-		CurView().Buf.SaveAs(args[0])
-	}
-}
-
-// Replace runs search and replace
-func Replace(args []string) {
-	if len(args) < 2 || len(args) > 4 {
-		// We need to find both a search and replace expression
-		messenger.Error("Invalid replace statement: " + strings.Join(args, " "))
-		return
-	}
-
-	all := false
-	noRegex := false
-
-	if len(args) > 2 {
-		for _, arg := range args[2:] {
-			switch arg {
-			case "-a":
-				all = true
-			case "-l":
-				noRegex = true
-			default:
-				messenger.Error("Invalid flag: " + arg)
-				return
-			}
-		}
-	}
-
-	search := string(args[0])
-
-	if noRegex {
-		search = regexp.QuoteMeta(search)
-	}
-
-	replace := string(args[1])
-
-	regex, err := regexp.Compile("(?m)" + search)
-	if err != nil {
-		// There was an error with the user's regex
-		messenger.Error(err.Error())
-		return
-	}
-
-	view := CurView()
-
-	found := 0
-	replaceAll := func() {
-		var deltas []Delta
-		deltaXOffset := Count(replace) - Count(search)
-		for i := 0; i < view.Buf.LinesNum(); i++ {
-			matches := regex.FindAllIndex(view.Buf.lines[i].data, -1)
-			str := string(view.Buf.lines[i].data)
-
-			if matches != nil {
-				xOffset := 0
-				for _, m := range matches {
-					from := Loc{runePos(m[0], str) + xOffset, i}
-					to := Loc{runePos(m[1], str) + xOffset, i}
-
-					xOffset += deltaXOffset
-
-					deltas = append(deltas, Delta{replace, from, to})
-					found++
-				}
-			}
-		}
-		view.Buf.MultipleReplace(deltas)
-	}
-
-	if all {
-		replaceAll()
-	} else {
-		for {
-			// The 'check' flag was used
-			Search(search, view, true)
-			if !view.Cursor.HasSelection() {
-				break
-			}
-			view.Relocate()
-			RedrawAll()
-			choice, canceled := messenger.LetterPrompt("Perform replacement? (y,n,a)", 'y', 'n', 'a')
-			if canceled {
-				if view.Cursor.HasSelection() {
-					view.Cursor.Loc = view.Cursor.CurSelection[0]
-					view.Cursor.ResetSelection()
-				}
-				messenger.Reset()
-				break
-			} else if choice == 'a' {
-				if view.Cursor.HasSelection() {
-					view.Cursor.Loc = view.Cursor.CurSelection[0]
-					view.Cursor.ResetSelection()
-				}
-				messenger.Reset()
-				replaceAll()
-				break
-			} else if choice == 'y' {
-				view.Cursor.DeleteSelection()
-				view.Buf.Insert(view.Cursor.Loc, replace)
-				view.Cursor.ResetSelection()
-				messenger.Reset()
-				found++
-			}
-			if view.Cursor.HasSelection() {
-				searchStart = view.Cursor.CurSelection[1]
-			} else {
-				searchStart = view.Cursor.Loc
-			}
-		}
-	}
-	view.Cursor.Relocate()
-
-	if found > 1 {
-		messenger.Message("Replaced ", found, " occurrences of ", search)
-	} else if found == 1 {
-		messenger.Message("Replaced ", found, " occurrence of ", search)
-	} else {
-		messenger.Message("Nothing matched ", search)
-	}
-}
-
-// ReplaceAll replaces search term all at once
-func ReplaceAll(args []string) {
-	// aliased to Replace command
-	Replace(append(args, "-a"))
-}
-
-// Term opens a terminal in the current view
-func Term(args []string) {
-	var err error
-	if len(args) == 0 {
-		err = CurView().StartTerminal([]string{os.Getenv("SHELL"), "-i"}, true, false, "")
-	} else {
-		err = CurView().StartTerminal(args, true, false, "")
-	}
-	if err != nil {
-		messenger.Error(err)
-	}
-}
-
-// HandleCommand handles input from the user
-func HandleCommand(input string) {
-	args, err := shellwords.Split(input)
-	if err != nil {
-		messenger.Error("Error parsing args ", err)
-		return
-	}
-
-	inputCmd := args[0]
-
-	if _, ok := commands[inputCmd]; !ok {
-		messenger.Error("Unknown command ", inputCmd)
-	} else {
-		commands[inputCmd].action(args[1:])
-	}
-}

cmd/micro/debug.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	"github.com/zyedidia/micro/internal/util"
+)
+
+// NullWriter simply sends writes into the void
+type NullWriter struct{}
+
+// Write is empty
+func (NullWriter) Write(data []byte) (n int, err error) {
+	return 0, nil
+}
+
+// InitLog sets up the debug log system for micro if it has been enabled by compile-time variables
+func InitLog() {
+	if util.Debug == "ON" {
+		f, err := os.OpenFile("log.txt", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
+		if err != nil {
+			log.Fatalf("error opening file: %v", err)
+		}
+
+		log.SetOutput(f)
+		log.Println("Micro started")
+	} else {
+		log.SetOutput(NullWriter{})
+	}
+}

cmd/micro/highlighter.go

@@ -1,28 +0,0 @@
-package main
-
-import "github.com/zyedidia/micro/cmd/micro/highlight"
-
-var syntaxFiles []*highlight.File
-
-func LoadSyntaxFiles() {
-	InitColorscheme()
-	for _, f := range ListRuntimeFiles(RTSyntax) {
-		data, err := f.Data()
-		if err != nil {
-			TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
-		} else {
-			LoadSyntaxFile(data, f.Name())
-		}
-	}
-}
-
-func LoadSyntaxFile(text []byte, filename string) {
-	f, err := highlight.ParseFile(text)
-
-	if err != nil {
-		TermMessage("Syntax file error: " + filename + ": " + err.Error())
-		return
-	}
-
-	syntaxFiles = append(syntaxFiles, f)
-}

cmd/micro/initlua.go

@@ -0,0 +1,149 @@
+package main
+
+import (
+	"log"
+
+	lua "github.com/yuin/gopher-lua"
+	luar "layeh.com/gopher-luar"
+
+	"github.com/zyedidia/micro/internal/action"
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/display"
+	ulua "github.com/zyedidia/micro/internal/lua"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/shell"
+	"github.com/zyedidia/micro/internal/util"
+)
+
+func init() {
+	ulua.L = lua.NewState()
+	ulua.L.SetGlobal("import", luar.New(ulua.L, LuaImport))
+}
+
+// LuaImport is meant to be called from lua by a plugin and will import the given micro package
+func LuaImport(pkg string) *lua.LTable {
+	switch pkg {
+	case "micro":
+		return luaImportMicro()
+	case "micro/shell":
+		return luaImportMicroShell()
+	case "micro/buffer":
+		return luaImportMicroBuffer()
+	case "micro/config":
+		return luaImportMicroConfig()
+	case "micro/util":
+		return luaImportMicroUtil()
+	default:
+		return ulua.Import(pkg)
+	}
+}
+
+func luaImportMicro() *lua.LTable {
+	pkg := ulua.L.NewTable()
+
+	ulua.L.SetField(pkg, "TermMessage", luar.New(ulua.L, screen.TermMessage))
+	ulua.L.SetField(pkg, "TermError", luar.New(ulua.L, screen.TermError))
+	ulua.L.SetField(pkg, "InfoBar", luar.New(ulua.L, action.GetInfoBar))
+	ulua.L.SetField(pkg, "Log", luar.New(ulua.L, log.Println))
+	ulua.L.SetField(pkg, "SetStatusInfoFn", luar.New(ulua.L, display.SetStatusInfoFnLua))
+	ulua.L.SetField(pkg, "CurPane", luar.New(ulua.L, func() action.Pane {
+		return action.MainTab().CurPane()
+	}))
+	ulua.L.SetField(pkg, "CurTab", luar.New(ulua.L, func() *action.Tab {
+		return action.MainTab()
+	}))
+
+	return pkg
+}
+
+func luaImportMicroConfig() *lua.LTable {
+	pkg := ulua.L.NewTable()
+
+	ulua.L.SetField(pkg, "MakeCommand", luar.New(ulua.L, action.MakeCommand))
+	ulua.L.SetField(pkg, "FileComplete", luar.New(ulua.L, buffer.FileComplete))
+	ulua.L.SetField(pkg, "HelpComplete", luar.New(ulua.L, action.HelpComplete))
+	ulua.L.SetField(pkg, "OptionComplete", luar.New(ulua.L, action.OptionComplete))
+	ulua.L.SetField(pkg, "OptionValueComplete", luar.New(ulua.L, action.OptionValueComplete))
+	ulua.L.SetField(pkg, "NoComplete", luar.New(ulua.L, nil))
+	ulua.L.SetField(pkg, "TryBindKey", luar.New(ulua.L, action.TryBindKey))
+	ulua.L.SetField(pkg, "Reload", luar.New(ulua.L, action.ReloadConfig))
+	ulua.L.SetField(pkg, "AddRuntimeFileFromMemory", luar.New(ulua.L, config.PluginAddRuntimeFileFromMemory))
+	ulua.L.SetField(pkg, "AddRuntimeFilesFromDirectory", luar.New(ulua.L, config.PluginAddRuntimeFilesFromDirectory))
+	ulua.L.SetField(pkg, "AddRuntimeFile", luar.New(ulua.L, config.PluginAddRuntimeFile))
+	ulua.L.SetField(pkg, "ListRuntimeFiles", luar.New(ulua.L, config.PluginListRuntimeFiles))
+	ulua.L.SetField(pkg, "ReadRuntimeFile", luar.New(ulua.L, config.PluginReadRuntimeFile))
+	ulua.L.SetField(pkg, "NewRTFiletype", luar.New(ulua.L, config.NewRTFiletype))
+	ulua.L.SetField(pkg, "RTColorscheme", luar.New(ulua.L, config.RTColorscheme))
+	ulua.L.SetField(pkg, "RTSyntax", luar.New(ulua.L, config.RTSyntax))
+	ulua.L.SetField(pkg, "RTHelp", luar.New(ulua.L, config.RTHelp))
+	ulua.L.SetField(pkg, "RTPlugin", luar.New(ulua.L, config.RTPlugin))
+	ulua.L.SetField(pkg, "RegisterCommonOption", luar.New(ulua.L, config.RegisterCommonOptionPlug))
+	ulua.L.SetField(pkg, "RegisterGlobalOption", luar.New(ulua.L, config.RegisterGlobalOptionPlug))
+	ulua.L.SetField(pkg, "GetGlobalOption", luar.New(ulua.L, config.GetGlobalOption))
+	ulua.L.SetField(pkg, "SetGlobalOption", luar.New(ulua.L, action.SetGlobalOption))
+	ulua.L.SetField(pkg, "SetGlobalOptionNative", luar.New(ulua.L, action.SetGlobalOptionNative))
+
+	return pkg
+}
+
+func luaImportMicroShell() *lua.LTable {
+	pkg := ulua.L.NewTable()
+
+	ulua.L.SetField(pkg, "ExecCommand", luar.New(ulua.L, shell.ExecCommand))
+	ulua.L.SetField(pkg, "RunCommand", luar.New(ulua.L, shell.RunCommand))
+	ulua.L.SetField(pkg, "RunBackgroundShell", luar.New(ulua.L, shell.RunBackgroundShell))
+	ulua.L.SetField(pkg, "RunInteractiveShell", luar.New(ulua.L, shell.RunInteractiveShell))
+	ulua.L.SetField(pkg, "JobStart", luar.New(ulua.L, shell.JobStart))
+	ulua.L.SetField(pkg, "JobSpawn", luar.New(ulua.L, shell.JobSpawn))
+	ulua.L.SetField(pkg, "JobStop", luar.New(ulua.L, shell.JobStop))
+	ulua.L.SetField(pkg, "JobSend", luar.New(ulua.L, shell.JobSend))
+	ulua.L.SetField(pkg, "RunTermEmulator", luar.New(ulua.L, action.RunTermEmulator))
+	ulua.L.SetField(pkg, "TermEmuSupported", luar.New(ulua.L, action.TermEmuSupported))
+
+	return pkg
+}
+
+func luaImportMicroBuffer() *lua.LTable {
+	pkg := ulua.L.NewTable()
+
+	ulua.L.SetField(pkg, "NewMessage", luar.New(ulua.L, buffer.NewMessage))
+	ulua.L.SetField(pkg, "NewMessageAtLine", luar.New(ulua.L, buffer.NewMessageAtLine))
+	ulua.L.SetField(pkg, "MTInfo", luar.New(ulua.L, buffer.MTInfo))
+	ulua.L.SetField(pkg, "MTWarning", luar.New(ulua.L, buffer.MTWarning))
+	ulua.L.SetField(pkg, "MTError", luar.New(ulua.L, buffer.MTError))
+	ulua.L.SetField(pkg, "Loc", luar.New(ulua.L, func(x, y int) buffer.Loc {
+		return buffer.Loc{x, y}
+	}))
+	ulua.L.SetField(pkg, "BTDefault", luar.New(ulua.L, buffer.BTDefault.Kind))
+	ulua.L.SetField(pkg, "BTHelp", luar.New(ulua.L, buffer.BTHelp.Kind))
+	ulua.L.SetField(pkg, "BTLog", luar.New(ulua.L, buffer.BTLog.Kind))
+	ulua.L.SetField(pkg, "BTScratch", luar.New(ulua.L, buffer.BTScratch.Kind))
+	ulua.L.SetField(pkg, "BTRaw", luar.New(ulua.L, buffer.BTRaw.Kind))
+	ulua.L.SetField(pkg, "BTInfo", luar.New(ulua.L, buffer.BTInfo.Kind))
+	ulua.L.SetField(pkg, "NewBuffer", luar.New(ulua.L, func(text, path string) *buffer.Buffer {
+		return buffer.NewBufferFromString(text, path, buffer.BTDefault)
+	}))
+	ulua.L.SetField(pkg, "NewBufferFromFile", luar.New(ulua.L, func(path string) (*buffer.Buffer, error) {
+		return buffer.NewBufferFromFile(path, buffer.BTDefault)
+	}))
+	ulua.L.SetField(pkg, "ByteOffset", luar.New(ulua.L, buffer.ByteOffset))
+	ulua.L.SetField(pkg, "Log", luar.New(ulua.L, buffer.WriteLog))
+	ulua.L.SetField(pkg, "LogBuf", luar.New(ulua.L, buffer.GetLogBuf))
+
+	return pkg
+}
+
+func luaImportMicroUtil() *lua.LTable {
+	pkg := ulua.L.NewTable()
+
+	ulua.L.SetField(pkg, "RuneAt", luar.New(ulua.L, util.LuaRuneAt))
+	ulua.L.SetField(pkg, "GetLeadingWhitespace", luar.New(ulua.L, util.LuaGetLeadingWhitespace))
+	ulua.L.SetField(pkg, "IsWordChar", luar.New(ulua.L, util.LuaIsWordChar))
+	ulua.L.SetField(pkg, "String", luar.New(ulua.L, util.String))
+	ulua.L.SetField(pkg, "RuneStr", luar.New(ulua.L, func(r rune) string {
+		return string(r)
+	}))
+
+	return pkg
+}

cmd/micro/keymenu.go

@@ -1,20 +0,0 @@
-package main
-
-// DisplayKeyMenu displays the nano-style key menu at the bottom of the screen
-func DisplayKeyMenu() {
-	w, h := screen.Size()
-
-	bot := h - 3
-
-	display := []string{"^Q Quit, ^S Save, ^O Open, ^G Help, ^E Command Bar, ^K Cut Line", "^F Find, ^Z Undo, ^Y Redo, ^A Select All, ^D Duplicate Line, ^T New Tab"}
-
-	for y := 0; y < len(display); y++ {
-		for x := 0; x < w; x++ {
-			if x < len(display[y]) {
-				screen.SetContent(x, bot+y, rune(display[y][x]), nil, defStyle)
-			} else {
-				screen.SetContent(x, bot+y, ' ', nil, defStyle)
-			}
-		}
-	}
-}

cmd/micro/lineArray.go

@@ -1,268 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"io"
-	"unicode/utf8"
-
-	"github.com/zyedidia/micro/cmd/micro/highlight"
-)
-
-func runeToByteIndex(n int, txt []byte) int {
-	if n == 0 {
-		return 0
-	}
-
-	count := 0
-	i := 0
-	for len(txt) > 0 {
-		_, size := utf8.DecodeRune(txt)
-
-		txt = txt[size:]
-		count += size
-		i++
-
-		if i == n {
-			break
-		}
-	}
-	return count
-}
-
-// A Line contains the data in bytes as well as a highlight state, match
-// and a flag for whether the highlighting needs to be updated
-type Line struct {
-	data []byte
-
-	state       highlight.State
-	match       highlight.LineMatch
-	rehighlight bool
-}
-
-// A LineArray simply stores and array of lines and makes it easy to insert
-// and delete in it
-type LineArray struct {
-	lines []Line
-}
-
-// Append efficiently appends lines together
-// It allocates an additional 10000 lines if the original estimate
-// is incorrect
-func Append(slice []Line, data ...Line) []Line {
-	l := len(slice)
-	if l+len(data) > cap(slice) { // reallocate
-		newSlice := make([]Line, (l+len(data))+10000)
-		// The copy function is predeclared and works for any slice type.
-		copy(newSlice, slice)
-		slice = newSlice
-	}
-	slice = slice[0 : l+len(data)]
-	for i, c := range data {
-		slice[l+i] = c
-	}
-	return slice
-}
-
-// NewLineArray returns a new line array from an array of bytes
-func NewLineArray(size int64, reader io.Reader) *LineArray {
-	la := new(LineArray)
-
-	la.lines = make([]Line, 0, 1000)
-
-	br := bufio.NewReader(reader)
-	var loaded int
-
-	n := 0
-	for {
-		data, err := br.ReadBytes('\n')
-		if len(data) > 1 && data[len(data)-2] == '\r' {
-			data = append(data[:len(data)-2], '\n')
-			if fileformat == 0 {
-				fileformat = 2
-			}
-		} else if len(data) > 0 {
-			if fileformat == 0 {
-				fileformat = 1
-			}
-		}
-
-		if n >= 1000 && loaded >= 0 {
-			totalLinesNum := int(float64(size) * (float64(n) / float64(loaded)))
-			newSlice := make([]Line, len(la.lines), totalLinesNum+10000)
-			// The copy function is predeclared and works for any slice type.
-			copy(newSlice, la.lines)
-			la.lines = newSlice
-			loaded = -1
-		}
-
-		if loaded >= 0 {
-			loaded += len(data)
-		}
-
-		if err != nil {
-			if err == io.EOF {
-				la.lines = Append(la.lines, Line{data[:], nil, nil, false})
-				// la.lines = Append(la.lines, Line{data[:len(data)]})
-			}
-			// Last line was read
-			break
-		} else {
-			// la.lines = Append(la.lines, Line{data[:len(data)-1]})
-			la.lines = Append(la.lines, Line{data[:len(data)-1], nil, nil, false})
-		}
-		n++
-	}
-
-	return la
-}
-
-// Returns the String representation of the LineArray
-func (la *LineArray) String() string {
-	str := ""
-	for i, l := range la.lines {
-		str += string(l.data)
-		if i != len(la.lines)-1 {
-			str += "\n"
-		}
-	}
-	return str
-}
-
-// SaveString returns the string that should be written to disk when
-// the line array is saved
-// It is the same as string but uses crlf or lf line endings depending
-func (la *LineArray) SaveString(useCrlf bool) string {
-	str := ""
-	for i, l := range la.lines {
-		str += string(l.data)
-		if i != len(la.lines)-1 {
-			if useCrlf {
-				str += "\r"
-			}
-			str += "\n"
-		}
-	}
-	return str
-}
-
-// NewlineBelow adds a newline below the given line number
-func (la *LineArray) NewlineBelow(y int) {
-	la.lines = append(la.lines, Line{[]byte(" "), nil, nil, false})
-	copy(la.lines[y+2:], la.lines[y+1:])
-	la.lines[y+1] = Line{[]byte(""), la.lines[y].state, nil, false}
-}
-
-// inserts a byte array at a given location
-func (la *LineArray) insert(pos Loc, value []byte) {
-	x, y := runeToByteIndex(pos.X, la.lines[pos.Y].data), pos.Y
-	// x, y := pos.x, pos.y
-	for i := 0; i < len(value); i++ {
-		if value[i] == '\n' {
-			la.Split(Loc{x, y})
-			x = 0
-			y++
-			continue
-		}
-		la.insertByte(Loc{x, y}, value[i])
-		x++
-	}
-}
-
-// inserts a byte at a given location
-func (la *LineArray) insertByte(pos Loc, value byte) {
-	la.lines[pos.Y].data = append(la.lines[pos.Y].data, 0)
-	copy(la.lines[pos.Y].data[pos.X+1:], la.lines[pos.Y].data[pos.X:])
-	la.lines[pos.Y].data[pos.X] = value
-}
-
-// JoinLines joins the two lines a and b
-func (la *LineArray) JoinLines(a, b int) {
-	la.insert(Loc{len(la.lines[a].data), a}, la.lines[b].data)
-	la.DeleteLine(b)
-}
-
-// Split splits a line at a given position
-func (la *LineArray) Split(pos Loc) {
-	la.NewlineBelow(pos.Y)
-	la.insert(Loc{0, pos.Y + 1}, la.lines[pos.Y].data[pos.X:])
-	la.lines[pos.Y+1].state = la.lines[pos.Y].state
-	la.lines[pos.Y].state = nil
-	la.lines[pos.Y].match = nil
-	la.lines[pos.Y+1].match = nil
-	la.lines[pos.Y].rehighlight = true
-	la.DeleteToEnd(Loc{pos.X, pos.Y})
-}
-
-// removes from start to end
-func (la *LineArray) remove(start, end Loc) string {
-	sub := la.Substr(start, end)
-	startX := runeToByteIndex(start.X, la.lines[start.Y].data)
-	endX := runeToByteIndex(end.X, la.lines[end.Y].data)
-	if start.Y == end.Y {
-		la.lines[start.Y].data = append(la.lines[start.Y].data[:startX], la.lines[start.Y].data[endX:]...)
-	} else {
-		for i := start.Y + 1; i <= end.Y-1; i++ {
-			la.DeleteLine(start.Y + 1)
-		}
-		la.DeleteToEnd(Loc{startX, start.Y})
-		la.DeleteFromStart(Loc{endX - 1, start.Y + 1})
-		la.JoinLines(start.Y, start.Y+1)
-	}
-	return sub
-}
-
-// DeleteToEnd deletes from the end of a line to the position
-func (la *LineArray) DeleteToEnd(pos Loc) {
-	la.lines[pos.Y].data = la.lines[pos.Y].data[:pos.X]
-}
-
-// DeleteFromStart deletes from the start of a line to the position
-func (la *LineArray) DeleteFromStart(pos Loc) {
-	la.lines[pos.Y].data = la.lines[pos.Y].data[pos.X+1:]
-}
-
-// DeleteLine deletes the line number
-func (la *LineArray) DeleteLine(y int) {
-	la.lines = la.lines[:y+copy(la.lines[y:], la.lines[y+1:])]
-}
-
-// DeleteByte deletes the byte at a position
-func (la *LineArray) DeleteByte(pos Loc) {
-	la.lines[pos.Y].data = la.lines[pos.Y].data[:pos.X+copy(la.lines[pos.Y].data[pos.X:], la.lines[pos.Y].data[pos.X+1:])]
-}
-
-// Substr returns the string representation between two locations
-func (la *LineArray) Substr(start, end Loc) string {
-	startX := runeToByteIndex(start.X, la.lines[start.Y].data)
-	endX := runeToByteIndex(end.X, la.lines[end.Y].data)
-	if start.Y == end.Y {
-		return string(la.lines[start.Y].data[startX:endX])
-	}
-	var str string
-	str += string(la.lines[start.Y].data[startX:]) + "\n"
-	for i := start.Y + 1; i <= end.Y-1; i++ {
-		str += string(la.lines[i].data) + "\n"
-	}
-	str += string(la.lines[end.Y].data[:endX])
-	return str
-}
-
-// State gets the highlight state for the given line number
-func (la *LineArray) State(lineN int) highlight.State {
-	return la.lines[lineN].state
-}
-
-// SetState sets the highlight state at the given line number
-func (la *LineArray) SetState(lineN int, s highlight.State) {
-	la.lines[lineN].state = s
-}
-
-// SetMatch sets the match at the given line number
-func (la *LineArray) SetMatch(lineN int, m highlight.LineMatch) {
-	la.lines[lineN].match = m
-}
-
-// Match retrieves the match for the given line number
-func (la *LineArray) Match(lineN int) highlight.LineMatch {
-	return la.lines[lineN].match
-}

cmd/micro/messenger.go

@@ -1,664 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"bytes"
-	"encoding/gob"
-	"fmt"
-	"os"
-	"strconv"
-
-	"github.com/mattn/go-runewidth"
-	"github.com/zyedidia/clipboard"
-	"github.com/zyedidia/micro/cmd/micro/shellwords"
-	"github.com/zyedidia/tcell"
-)
-
-// TermMessage sends a message to the user in the terminal. This usually occurs before
-// micro has been fully initialized -- ie if there is an error in the syntax highlighting
-// regular expressions
-// The function must be called when the screen is not initialized
-// This will write the message, and wait for the user
-// to press and key to continue
-func TermMessage(msg ...interface{}) {
-	screenWasNil := screen == nil
-	if !screenWasNil {
-		screen.Fini()
-		screen = nil
-	}
-
-	fmt.Println(msg...)
-	fmt.Print("\nPress enter to continue")
-
-	reader := bufio.NewReader(os.Stdin)
-	reader.ReadString('\n')
-
-	if !screenWasNil {
-		InitScreen()
-	}
-}
-
-// TermError sends an error to the user in the terminal. Like TermMessage except formatted
-// as an error
-func TermError(filename string, lineNum int, err string) {
-	TermMessage(filename + ", " + strconv.Itoa(lineNum) + ": " + err)
-}
-
-// Messenger is an object that makes it easy to send messages to the user
-// and get input from the user
-type Messenger struct {
-	log *Buffer
-	// Are we currently prompting the user?
-	hasPrompt bool
-	// Is there a message to print
-	hasMessage bool
-
-	// Message to print
-	message string
-	// The user's response to a prompt
-	response string
-	// style to use when drawing the message
-	style tcell.Style
-
-	// We have to keep track of the cursor for prompting
-	cursorx int
-
-	// This map stores the history for all the different kinds of uses Prompt has
-	// It's a map of history type -> history array
-	history    map[string][]string
-	historyNum int
-
-	// Is the current message a message from the gutter
-	gutterMessage bool
-}
-
-// AddLog sends a message to the log view
-func (m *Messenger) AddLog(msg ...interface{}) {
-	logMessage := fmt.Sprint(msg...)
-	buffer := m.getBuffer()
-	buffer.insert(buffer.End(), []byte(logMessage+"\n"))
-	buffer.Cursor.Loc = buffer.End()
-	buffer.Cursor.Relocate()
-}
-
-func (m *Messenger) getBuffer() *Buffer {
-	if m.log == nil {
-		m.log = NewBufferFromString("", "")
-		m.log.name = "Log"
-	}
-	return m.log
-}
-
-// Message sends a message to the user
-func (m *Messenger) Message(msg ...interface{}) {
-	displayMessage := fmt.Sprint(msg...)
-	// only display a new message if there isn't an active prompt
-	// this is to prevent overwriting an existing prompt to the user
-	if m.hasPrompt == false {
-		// if there is no active prompt then style and display the message as normal
-		m.message = displayMessage
-
-		m.style = defStyle
-
-		if _, ok := colorscheme["message"]; ok {
-			m.style = colorscheme["message"]
-		}
-
-		m.hasMessage = true
-	}
-	// add the message to the log regardless of active prompts
-	m.AddLog(displayMessage)
-}
-
-// Error sends an error message to the user
-func (m *Messenger) Error(msg ...interface{}) {
-	buf := new(bytes.Buffer)
-	fmt.Fprint(buf, msg...)
-
-	// only display a new message if there isn't an active prompt
-	// this is to prevent overwriting an existing prompt to the user
-	if m.hasPrompt == false {
-		// if there is no active prompt then style and display the message as normal
-		m.message = buf.String()
-		m.style = defStyle.
-			Foreground(tcell.ColorBlack).
-			Background(tcell.ColorMaroon)
-
-		if _, ok := colorscheme["error-message"]; ok {
-			m.style = colorscheme["error-message"]
-		}
-		m.hasMessage = true
-	}
-	// add the message to the log regardless of active prompts
-	m.AddLog(buf.String())
-}
-
-func (m *Messenger) PromptText(msg ...interface{}) {
-	displayMessage := fmt.Sprint(msg...)
-	// if there is no active prompt then style and display the message as normal
-	m.message = displayMessage
-
-	m.style = defStyle
-
-	if _, ok := colorscheme["message"]; ok {
-		m.style = colorscheme["message"]
-	}
-
-	m.hasMessage = true
-	// add the message to the log regardless of active prompts
-	m.AddLog(displayMessage)
-}
-
-// YesNoPrompt asks the user a yes or no question (waits for y or n) and returns the result
-func (m *Messenger) YesNoPrompt(prompt string) (bool, bool) {
-	m.hasPrompt = true
-	m.PromptText(prompt)
-
-	_, h := screen.Size()
-	for {
-		m.Clear()
-		m.Display()
-		screen.ShowCursor(Count(m.message), h-1)
-		screen.Show()
-		event := <-events
-
-		switch e := event.(type) {
-		case *tcell.EventKey:
-			switch e.Key() {
-			case tcell.KeyRune:
-				if e.Rune() == 'y' || e.Rune() == 'Y' {
-					m.AddLog("\t--> y")
-					m.hasPrompt = false
-					return true, false
-				} else if e.Rune() == 'n' || e.Rune() == 'N' {
-					m.AddLog("\t--> n")
-					m.hasPrompt = false
-					return false, false
-				}
-			case tcell.KeyCtrlC, tcell.KeyCtrlQ, tcell.KeyEscape:
-				m.AddLog("\t--> (cancel)")
-				m.Clear()
-				m.Reset()
-				m.hasPrompt = false
-				return false, true
-			}
-		}
-	}
-}
-
-// LetterPrompt gives the user a prompt and waits for a one letter response
-func (m *Messenger) LetterPrompt(prompt string, responses ...rune) (rune, bool) {
-	m.hasPrompt = true
-	m.PromptText(prompt)
-
-	_, h := screen.Size()
-	for {
-		m.Clear()
-		m.Display()
-		screen.ShowCursor(Count(m.message), h-1)
-		screen.Show()
-		event := <-events
-
-		switch e := event.(type) {
-		case *tcell.EventKey:
-			switch e.Key() {
-			case tcell.KeyRune:
-				for _, r := range responses {
-					if e.Rune() == r {
-						m.AddLog("\t--> " + string(r))
-						m.Clear()
-						m.Reset()
-						m.hasPrompt = false
-						return r, false
-					}
-				}
-			case tcell.KeyCtrlC, tcell.KeyCtrlQ, tcell.KeyEscape:
-				m.AddLog("\t--> (cancel)")
-				m.Clear()
-				m.Reset()
-				m.hasPrompt = false
-				return ' ', true
-			}
-		}
-	}
-}
-
-// Completion represents a type of completion
-type Completion int
-
-const (
-	NoCompletion Completion = iota
-	FileCompletion
-	CommandCompletion
-	HelpCompletion
-	OptionCompletion
-	PluginCmdCompletion
-	PluginNameCompletion
-	OptionValueCompletion
-)
-
-// Prompt sends the user a message and waits for a response to be typed in
-// This function blocks the main loop while waiting for input
-func (m *Messenger) Prompt(prompt, placeholder, historyType string, completionTypes ...Completion) (string, bool) {
-	m.hasPrompt = true
-	m.PromptText(prompt)
-	if _, ok := m.history[historyType]; !ok {
-		m.history[historyType] = []string{""}
-	} else {
-		m.history[historyType] = append(m.history[historyType], "")
-	}
-	m.historyNum = len(m.history[historyType]) - 1
-
-	response, canceled := placeholder, true
-	m.response = response
-	m.cursorx = Count(placeholder)
-
-	RedrawAll()
-	for m.hasPrompt {
-		var suggestions []string
-		m.Clear()
-
-		event := <-events
-
-		switch e := event.(type) {
-		case *tcell.EventKey:
-			switch e.Key() {
-			case tcell.KeyCtrlQ, tcell.KeyCtrlC, tcell.KeyEscape:
-				// Cancel
-				m.AddLog("\t--> (cancel)")
-				m.hasPrompt = false
-			case tcell.KeyEnter:
-				// User is done entering their response
-				m.AddLog("\t--> " + m.response)
-				m.hasPrompt = false
-				response, canceled = m.response, false
-				m.history[historyType][len(m.history[historyType])-1] = response
-			case tcell.KeyTab:
-				args, err := shellwords.Split(m.response)
-				if err != nil {
-					break
-				}
-				currentArg := ""
-				currentArgNum := 0
-				if len(args) > 0 {
-					currentArgNum = len(args) - 1
-					currentArg = args[currentArgNum]
-				}
-				var completionType Completion
-
-				if completionTypes[0] == CommandCompletion && currentArgNum > 0 {
-					if command, ok := commands[args[0]]; ok {
-						completionTypes = append([]Completion{CommandCompletion}, command.completions...)
-					}
-				}
-
-				if currentArgNum >= len(completionTypes) {
-					completionType = completionTypes[len(completionTypes)-1]
-				} else {
-					completionType = completionTypes[currentArgNum]
-				}
-
-				var chosen string
-				if completionType == FileCompletion {
-					chosen, suggestions = FileComplete(currentArg)
-				} else if completionType == CommandCompletion {
-					chosen, suggestions = CommandComplete(currentArg)
-				} else if completionType == HelpCompletion {
-					chosen, suggestions = HelpComplete(currentArg)
-				} else if completionType == OptionCompletion {
-					chosen, suggestions = OptionComplete(currentArg)
-				} else if completionType == OptionValueCompletion {
-					if currentArgNum-1 > 0 {
-						chosen, suggestions = OptionValueComplete(args[currentArgNum-1], currentArg)
-					}
-				} else if completionType == PluginCmdCompletion {
-					chosen, suggestions = PluginCmdComplete(currentArg)
-				} else if completionType == PluginNameCompletion {
-					chosen, suggestions = PluginNameComplete(currentArg)
-				} else if completionType < NoCompletion {
-					chosen, suggestions = PluginComplete(completionType, currentArg)
-				}
-
-				if len(suggestions) > 1 {
-					chosen = chosen + CommonSubstring(suggestions...)
-				}
-
-				if len(suggestions) != 0 && chosen != "" {
-					m.response = shellwords.Join(append(args[:len(args)-1], chosen)...)
-					m.cursorx = Count(m.response)
-				}
-			}
-		}
-
-		m.HandleEvent(event, m.history[historyType])
-
-		m.Clear()
-		for _, v := range tabs[curTab].views {
-			v.Display()
-		}
-		DisplayTabs()
-		m.Display()
-		if len(suggestions) > 1 {
-			m.DisplaySuggestions(suggestions)
-		}
-		screen.Show()
-	}
-
-	m.Clear()
-	m.Reset()
-	return response, canceled
-}
-
-// UpHistory fetches the previous item in the history
-func (m *Messenger) UpHistory(history []string) {
-	if m.historyNum > 0 {
-		m.historyNum--
-		m.response = history[m.historyNum]
-		m.cursorx = Count(m.response)
-	}
-}
-
-// DownHistory fetches the next item in the history
-func (m *Messenger) DownHistory(history []string) {
-	if m.historyNum < len(history)-1 {
-		m.historyNum++
-		m.response = history[m.historyNum]
-		m.cursorx = Count(m.response)
-	}
-}
-
-// CursorLeft moves the cursor one character left
-func (m *Messenger) CursorLeft() {
-	if m.cursorx > 0 {
-		m.cursorx--
-	}
-}
-
-// CursorRight moves the cursor one character right
-func (m *Messenger) CursorRight() {
-	if m.cursorx < Count(m.response) {
-		m.cursorx++
-	}
-}
-
-// Start moves the cursor to the start of the line
-func (m *Messenger) Start() {
-	m.cursorx = 0
-}
-
-// End moves the cursor to the end of the line
-func (m *Messenger) End() {
-	m.cursorx = Count(m.response)
-}
-
-// Backspace deletes one character
-func (m *Messenger) Backspace() {
-	if m.cursorx > 0 {
-		m.response = string([]rune(m.response)[:m.cursorx-1]) + string([]rune(m.response)[m.cursorx:])
-		m.cursorx--
-	}
-}
-
-// Paste pastes the clipboard
-func (m *Messenger) Paste() {
-	clip, _ := clipboard.ReadAll("clipboard")
-	m.response = Insert(m.response, m.cursorx, clip)
-	m.cursorx += Count(clip)
-}
-
-// WordLeft moves the cursor one word to the left
-func (m *Messenger) WordLeft() {
-	response := []rune(m.response)
-	m.CursorLeft()
-	if m.cursorx <= 0 {
-		return
-	}
-	for IsWhitespace(response[m.cursorx]) {
-		if m.cursorx <= 0 {
-			return
-		}
-		m.CursorLeft()
-	}
-	m.CursorLeft()
-	for IsWordChar(string(response[m.cursorx])) {
-		if m.cursorx <= 0 {
-			return
-		}
-		m.CursorLeft()
-	}
-	m.CursorRight()
-}
-
-// WordRight moves the cursor one word to the right
-func (m *Messenger) WordRight() {
-	response := []rune(m.response)
-	if m.cursorx >= len(response) {
-		return
-	}
-	for IsWhitespace(response[m.cursorx]) {
-		m.CursorRight()
-		if m.cursorx >= len(response) {
-			m.CursorRight()
-			return
-		}
-	}
-	m.CursorRight()
-	if m.cursorx >= len(response) {
-		return
-	}
-	for IsWordChar(string(response[m.cursorx])) {
-		m.CursorRight()
-		if m.cursorx >= len(response) {
-			return
-		}
-	}
-}
-
-// DeleteWordLeft deletes one word to the left
-func (m *Messenger) DeleteWordLeft() {
-	m.WordLeft()
-	m.response = string([]rune(m.response)[:m.cursorx])
-}
-
-// HandleEvent handles an event for the prompter
-func (m *Messenger) HandleEvent(event tcell.Event, history []string) {
-	switch e := event.(type) {
-	case *tcell.EventKey:
-		switch e.Key() {
-		case tcell.KeyCtrlA:
-			m.Start()
-		case tcell.KeyCtrlE:
-			m.End()
-		case tcell.KeyUp:
-			m.UpHistory(history)
-		case tcell.KeyDown:
-			m.DownHistory(history)
-		case tcell.KeyLeft:
-			if e.Modifiers() == tcell.ModCtrl {
-				m.Start()
-			} else if e.Modifiers() == tcell.ModAlt || e.Modifiers() == tcell.ModMeta {
-				m.WordLeft()
-			} else {
-				m.CursorLeft()
-			}
-		case tcell.KeyRight:
-			if e.Modifiers() == tcell.ModCtrl {
-				m.End()
-			} else if e.Modifiers() == tcell.ModAlt || e.Modifiers() == tcell.ModMeta {
-				m.WordRight()
-			} else {
-				m.CursorRight()
-			}
-		case tcell.KeyBackspace2, tcell.KeyBackspace:
-			if e.Modifiers() == tcell.ModCtrl || e.Modifiers() == tcell.ModAlt || e.Modifiers() == tcell.ModMeta {
-				m.DeleteWordLeft()
-			} else {
-				m.Backspace()
-			}
-		case tcell.KeyCtrlW:
-			m.DeleteWordLeft()
-		case tcell.KeyCtrlV:
-			m.Paste()
-		case tcell.KeyCtrlF:
-			m.WordRight()
-		case tcell.KeyCtrlB:
-			m.WordLeft()
-		case tcell.KeyRune:
-			m.response = Insert(m.response, m.cursorx, string(e.Rune()))
-			m.cursorx++
-		}
-		history[m.historyNum] = m.response
-
-	case *tcell.EventPaste:
-		clip := e.Text()
-		m.response = Insert(m.response, m.cursorx, clip)
-		m.cursorx += Count(clip)
-	case *tcell.EventMouse:
-		x, y := e.Position()
-		x -= Count(m.message)
-		button := e.Buttons()
-		_, screenH := screen.Size()
-
-		if y == screenH-1 {
-			switch button {
-			case tcell.Button1:
-				m.cursorx = x
-				if m.cursorx < 0 {
-					m.cursorx = 0
-				} else if m.cursorx > Count(m.response) {
-					m.cursorx = Count(m.response)
-				}
-			}
-		}
-	}
-}
-
-// Reset resets the messenger's cursor, message and response
-func (m *Messenger) Reset() {
-	m.cursorx = 0
-	m.message = ""
-	m.response = ""
-}
-
-// Clear clears the line at the bottom of the editor
-func (m *Messenger) Clear() {
-	w, h := screen.Size()
-	for x := 0; x < w; x++ {
-		screen.SetContent(x, h-1, ' ', nil, defStyle)
-	}
-}
-
-func (m *Messenger) DisplaySuggestions(suggestions []string) {
-	w, screenH := screen.Size()
-
-	y := screenH - 2
-
-	statusLineStyle := defStyle.Reverse(true)
-	if style, ok := colorscheme["statusline"]; ok {
-		statusLineStyle = style
-	}
-
-	for x := 0; x < w; x++ {
-		screen.SetContent(x, y, ' ', nil, statusLineStyle)
-	}
-
-	x := 0
-	for _, suggestion := range suggestions {
-		for _, c := range suggestion {
-			screen.SetContent(x, y, c, nil, statusLineStyle)
-			x++
-		}
-		screen.SetContent(x, y, ' ', nil, statusLineStyle)
-		x++
-	}
-}
-
-// Display displays messages or prompts
-func (m *Messenger) Display() {
-	_, h := screen.Size()
-	if m.hasMessage {
-		if m.hasPrompt || globalSettings["infobar"].(bool) {
-			runes := []rune(m.message + m.response)
-			posx := 0
-			for x := 0; x < len(runes); x++ {
-				screen.SetContent(posx, h-1, runes[x], nil, m.style)
-				posx += runewidth.RuneWidth(runes[x])
-			}
-		}
-	}
-
-	if m.hasPrompt {
-		screen.ShowCursor(Count(m.message)+m.cursorx, h-1)
-		screen.Show()
-	}
-}
-
-// LoadHistory attempts to load user history from configDir/buffers/history
-// into the history map
-// The savehistory option must be on
-func (m *Messenger) LoadHistory() {
-	if GetGlobalOption("savehistory").(bool) {
-		file, err := os.Open(configDir + "/buffers/history")
-		var decodedMap map[string][]string
-		if err == nil {
-			decoder := gob.NewDecoder(file)
-			err = decoder.Decode(&decodedMap)
-			file.Close()
-
-			if err != nil {
-				m.Error("Error loading history:", err)
-				return
-			}
-		}
-
-		if decodedMap != nil {
-			m.history = decodedMap
-		} else {
-			m.history = make(map[string][]string)
-		}
-	} else {
-		m.history = make(map[string][]string)
-	}
-}
-
-// SaveHistory saves the user's command history to configDir/buffers/history
-// only if the savehistory option is on
-func (m *Messenger) SaveHistory() {
-	if GetGlobalOption("savehistory").(bool) {
-		// Don't save history past 100
-		for k, v := range m.history {
-			if len(v) > 100 {
-				m.history[k] = v[len(m.history[k])-100:]
-			}
-		}
-
-		file, err := os.Create(configDir + "/buffers/history")
-		if err == nil {
-			encoder := gob.NewEncoder(file)
-
-			err = encoder.Encode(m.history)
-			if err != nil {
-				m.Error("Error saving history:", err)
-				return
-			}
-			file.Close()
-		}
-	}
-}
-
-// A GutterMessage is a message displayed on the side of the editor
-type GutterMessage struct {
-	lineNum int
-	msg     string
-	kind    int
-}
-
-// These are the different types of messages
-const (
-	// GutterInfo represents a simple info message
-	GutterInfo = iota
-	// GutterWarning represents a compiler warning
-	GutterWarning
-	// GutterError represents a compiler error
-	GutterError
-)

cmd/micro/micro.go

@@ -5,68 +5,130 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path/filepath"
 	"runtime"
+	"sort"
 	"time"
 
 	"github.com/go-errors/errors"
-	"github.com/mattn/go-isatty"
-	"github.com/mitchellh/go-homedir"
-	"github.com/yuin/gopher-lua"
-	"github.com/zyedidia/clipboard"
+	isatty "github.com/mattn/go-isatty"
+	"github.com/zyedidia/micro/internal/action"
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/shell"
+	"github.com/zyedidia/micro/internal/util"
 	"github.com/zyedidia/tcell"
-	"github.com/zyedidia/tcell/encoding"
-	"layeh.com/gopher-luar"
-)
-
-const (
-	doubleClickThreshold = 400 // How many milliseconds to wait before a second click is not a double click
-	undoThreshold        = 500 // If two events are less than n milliseconds apart, undo both of them
-	autosaveTime         = 8   // Number of seconds to wait before autosaving
 )
 
 var (
-	// The main screen
-	screen tcell.Screen
-
-	// Object to send messages and prompts to the user
-	messenger *Messenger
-
-	// The default highlighting style
-	// This simply defines the default foreground and background colors
-	defStyle tcell.Style
-
-	// Where the user's configuration is
-	// This should be $XDG_CONFIG_HOME/micro
-	// If $XDG_CONFIG_HOME is not set, it is ~/.config/micro
-	configDir string
-
-	// Version is the version number or commit hash
-	// These variables should be set by the linker when compiling
-	Version = "0.0.0-unknown"
-	// CommitHash is the commit this version was built on
-	CommitHash = "Unknown"
-	// CompileDate is the date this binary was compiled on
-	CompileDate = "Unknown"
-
-	// The list of views
-	tabs []*Tab
-	// This is the currently open tab
-	// It's just an index to the tab in the tabs array
-	curTab int
-
-	// Channel of jobs running in the background
-	jobs chan JobFunction
 	// Event channel
-	events     chan tcell.Event
-	autosave   chan bool
-	updateterm chan bool
-	closeterm  chan int
+	events   chan tcell.Event
+	autosave chan bool
+
+	// Command line flags
+	flagVersion   = flag.Bool("version", false, "Show the version number and information")
+	flagConfigDir = flag.String("config-dir", "", "Specify a custom location for the configuration directory")
+	flagOptions   = flag.Bool("options", false, "Show all option help")
+	flagDebug     = flag.Bool("debug", false, "Enable debug mode (prints debug info to ./log.txt)")
+	flagPlugin    = flag.String("plugin", "", "Plugin command")
+	flagClean     = flag.Bool("clean", false, "Clean configuration directory")
+	optionFlags   map[string]*string
 )
 
+func InitFlags() {
+	flag.Usage = func() {
+		fmt.Println("Usage: micro [OPTIONS] [FILE]...")
+		fmt.Println("-clean")
+		fmt.Println("    \tCleans the configuration directory")
+		fmt.Println("-config-dir dir")
+		fmt.Println("    \tSpecify a custom location for the configuration directory")
+		fmt.Println("[FILE]:LINE:COL")
+		fmt.Println("    \tSpecify a line and column to start the cursor at when opening a buffer")
+		fmt.Println("-options")
+		fmt.Println("    \tShow all option help")
+		fmt.Println("-debug")
+		fmt.Println("    \tEnable debug mode (enables logging to ./log.txt)")
+		fmt.Println("-version")
+		fmt.Println("    \tShow the version number and information")
+
+		fmt.Print("\nMicro's plugin's can be managed at the command line with the following commands.\n")
+		fmt.Println("-plugin install [PLUGIN]...")
+		fmt.Println("    \tInstall plugin(s)")
+		fmt.Println("-plugin remove [PLUGIN]...")
+		fmt.Println("    \tRemove plugin(s)")
+		fmt.Println("-plugin update [PLUGIN]...")
+		fmt.Println("    \tUpdate plugin(s) (if no argument is given, updates all plugins)")
+		fmt.Println("-plugin search [PLUGIN]...")
+		fmt.Println("    \tSearch for a plugin")
+		fmt.Println("-plugin list")
+		fmt.Println("    \tList installed plugins")
+		fmt.Println("-plugin available")
+		fmt.Println("    \tList available plugins")
+
+		fmt.Print("\nMicro's options can also be set via command line arguments for quick\nadjustments. For real configuration, please use the settings.json\nfile (see 'help options').\n\n")
+		fmt.Println("-option value")
+		fmt.Println("    \tSet `option` to `value` for this session")
+		fmt.Println("    \tFor example: `micro -syntax off file.c`")
+		fmt.Println("\nUse `micro -options` to see the full list of configuration options")
+	}
+
+	optionFlags = make(map[string]*string)
+
+	for k, v := range config.DefaultAllSettings() {
+		optionFlags[k] = flag.String(k, "", fmt.Sprintf("The %s option. Default value: '%v'.", k, v))
+	}
+
+	flag.Parse()
+
+	if *flagVersion {
+		// If -version was passed
+		fmt.Println("Version:", util.Version)
+		fmt.Println("Commit hash:", util.CommitHash)
+		fmt.Println("Compiled on", util.CompileDate)
+		os.Exit(0)
+	}
+
+	if *flagOptions {
+		// If -options was passed
+		var keys []string
+		m := config.DefaultAllSettings()
+		for k := range m {
+			keys = append(keys, k)
+		}
+		sort.Strings(keys)
+		for _, k := range keys {
+			v := m[k]
+			fmt.Printf("-%s value\n", k)
+			fmt.Printf("    \tDefault value: '%v'\n", v)
+		}
+		os.Exit(0)
+	}
+
+	if util.Debug == "OFF" && *flagDebug {
+		util.Debug = "ON"
+	}
+}
+
+// DoPluginFlags parses and executes any flags that require LoadAllPlugins (-plugin and -clean)
+func DoPluginFlags() {
+	if *flagClean || *flagPlugin != "" {
+		config.LoadAllPlugins()
+
+		if *flagPlugin != "" {
+			args := flag.Args()
+
+			config.PluginCommand(os.Stdout, *flagPlugin, args)
+		} else if *flagClean {
+			CleanConfig()
+		}
+
+		os.Exit(0)
+	}
+}
+
 // LoadInput determines which files should be loaded into buffers
 // based on the input stored in flag.Args()
-func LoadInput() []*Buffer {
+func LoadInput() []*buffer.Buffer {
 	// There are a number of ways micro should start given its input
 
 	// 1. If it is given a files in flag.Args(), it should open those
@@ -82,36 +144,19 @@ func LoadInput() []*Buffer {
 	var input []byte
 	var err error
 	args := flag.Args()
-	buffers := make([]*Buffer, 0, len(args))
+	buffers := make([]*buffer.Buffer, 0, len(args))
 
 	if len(args) > 0 {
 		// Option 1
 		// We go through each file and load it
 		for i := 0; i < len(args); i++ {
-			filename = args[i]
-
-			// Check that the file exists
-			var input *os.File
-			if _, e := os.Stat(filename); e == nil {
-				// If it exists we load it into a buffer
-				input, err = os.Open(filename)
-				stat, _ := input.Stat()
-				defer input.Close()
-				if err != nil {
-					TermMessage(err)
-					continue
-				}
-				if stat.IsDir() {
-					TermMessage("Cannot read", filename, "because it is a directory")
-					continue
-				}
+			buf, err := buffer.NewBufferFromFile(args[i], buffer.BTDefault)
+			if err != nil {
+				screen.TermMessage(err)
+				continue
 			}
 			// If the file didn't exist, input will be empty, and we'll open an empty buffer
-			if input != nil {
-				buffers = append(buffers, NewBuffer(input, FSize(input), filename))
-			} else {
-				buffers = append(buffers, NewBufferFromString("", filename))
-			}
+			buffers = append(buffers, buf)
 		}
 	} else if !isatty.IsTerminal(os.Stdin.Fd()) {
 		// Option 2
@@ -119,446 +164,168 @@ func LoadInput() []*Buffer {
 		// and we should read from stdin
 		input, err = ioutil.ReadAll(os.Stdin)
 		if err != nil {
-			TermMessage("Error reading from stdin: ", err)
+			screen.TermMessage("Error reading from stdin: ", err)
 			input = []byte{}
 		}
-		buffers = append(buffers, NewBufferFromString(string(input), filename))
+		buffers = append(buffers, buffer.NewBufferFromString(string(input), filename, buffer.BTDefault))
 	} else {
 		// Option 3, just open an empty buffer
-		buffers = append(buffers, NewBufferFromString(string(input), filename))
+		buffers = append(buffers, buffer.NewBufferFromString(string(input), filename, buffer.BTDefault))
 	}
 
 	return buffers
 }
 
-// InitConfigDir finds the configuration directory for micro according to the XDG spec.
-// If no directory is found, it creates one.
-func InitConfigDir() {
-	xdgHome := os.Getenv("XDG_CONFIG_HOME")
-	if xdgHome == "" {
-		// The user has not set $XDG_CONFIG_HOME so we should act like it was set to ~/.config
-		home, err := homedir.Dir()
-		if err != nil {
-			TermMessage("Error finding your home directory\nCan't load config files")
-			return
-		}
-		xdgHome = home + "/.config"
-	}
-	configDir = xdgHome + "/micro"
-
-	if len(*flagConfigDir) > 0 {
-		if _, err := os.Stat(*flagConfigDir); os.IsNotExist(err) {
-			TermMessage("Error: " + *flagConfigDir + " does not exist. Defaulting to " + configDir + ".")
-		} else {
-			configDir = *flagConfigDir
-			return
-		}
-	}
-
-	if _, err := os.Stat(xdgHome); os.IsNotExist(err) {
-		// If the xdgHome doesn't exist we should create it
-		err = os.Mkdir(xdgHome, os.ModePerm)
-		if err != nil {
-			TermMessage("Error creating XDG_CONFIG_HOME directory: " + err.Error())
-		}
-	}
-
-	if _, err := os.Stat(configDir); os.IsNotExist(err) {
-		// If the micro specific config directory doesn't exist we should create that too
-		err = os.Mkdir(configDir, os.ModePerm)
-		if err != nil {
-			TermMessage("Error creating configuration directory: " + err.Error())
-		}
-	}
-}
-
-// InitScreen creates and initializes the tcell screen
-func InitScreen() {
-	// Should we enable true color?
-	truecolor := os.Getenv("MICRO_TRUECOLOR") == "1"
-
-	// In order to enable true color, we have to set the TERM to `xterm-truecolor` when
-	// initializing tcell, but after that, we can set the TERM back to whatever it was
-	oldTerm := os.Getenv("TERM")
-	if truecolor {
-		os.Setenv("TERM", "xterm-truecolor")
-	}
-
-	// Initilize tcell
-	var err error
-	screen, err = tcell.NewScreen()
-	if err != nil {
-		fmt.Println(err)
-		if err == tcell.ErrTermNotFound {
-			fmt.Println("Micro does not recognize your terminal:", oldTerm)
-			fmt.Println("Please go to https://github.com/zyedidia/mkinfo to read about how to fix this problem (it should be easy to fix).")
-		}
-		os.Exit(1)
-	}
-	if err = screen.Init(); err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
-
-	// Now we can put the TERM back to what it was before
-	if truecolor {
-		os.Setenv("TERM", oldTerm)
-	}
-
-	if GetGlobalOption("mouse").(bool) {
-		screen.EnableMouse()
-	}
-
-	// screen.SetStyle(defStyle)
-}
-
-// RedrawAll redraws everything -- all the views and the messenger
-func RedrawAll() {
-	messenger.Clear()
-
-	w, h := screen.Size()
-	for x := 0; x < w; x++ {
-		for y := 0; y < h; y++ {
-			screen.SetContent(x, y, ' ', nil, defStyle)
-		}
-	}
-
-	for _, v := range tabs[curTab].views {
-		v.Display()
-	}
-	DisplayTabs()
-	messenger.Display()
-	if globalSettings["keymenu"].(bool) {
-		DisplayKeyMenu()
-	}
-	screen.Show()
-}
-
-func LoadAll() {
-	// Find the user's configuration directory (probably $XDG_CONFIG_HOME/micro)
-	InitConfigDir()
-
-	// Build a list of available Extensions (Syntax, Colorscheme etc.)
-	InitRuntimeFiles()
-
-	// Load the user's settings
-	InitGlobalSettings()
-
-	InitCommands()
-	InitBindings()
-
-	InitColorscheme()
-
-	for _, tab := range tabs {
-		for _, v := range tab.views {
-			v.Buf.UpdateRules()
-		}
-	}
-}
-
-// Command line flags
-var flagVersion = flag.Bool("version", false, "Show the version number and information")
-var flagStartPos = flag.String("startpos", "", "LINE,COL to start the cursor at when opening a buffer.")
-var flagConfigDir = flag.String("config-dir", "", "Specify a custom location for the configuration directory")
-var flagOptions = flag.Bool("options", false, "Show all option help")
-
 func main() {
-	flag.Usage = func() {
-		fmt.Println("Usage: micro [OPTIONS] [FILE]...")
-		fmt.Println("-config-dir dir")
-		fmt.Println("    \tSpecify a custom location for the configuration directory")
-		fmt.Println("-startpos LINE,COL")
-		fmt.Println("    \tSpecify a line and column to start the cursor at when opening a buffer")
-		fmt.Println("-options")
-		fmt.Println("    \tShow all option help")
-		fmt.Println("-version")
-		fmt.Println("    \tShow the version number and information")
+	defer os.Exit(0)
 
-		fmt.Print("\nMicro's options can also be set via command line arguments for quick\nadjustments. For real configuration, please use the settings.json\nfile (see 'help options').\n\n")
-		fmt.Println("-option value")
-		fmt.Println("    \tSet `option` to `value` for this session")
-		fmt.Println("    \tFor example: `micro -syntax off file.c`")
-		fmt.Println("\nUse `micro -options` to see the full list of configuration options")
+	// runtime.SetCPUProfileRate(400)
+	// f, _ := os.Create("micro.prof")
+	// pprof.StartCPUProfile(f)
+	// defer pprof.StopCPUProfile()
+
+	var err error
+
+	InitFlags()
+
+	InitLog()
+
+	err = config.InitConfigDir(*flagConfigDir)
+	if err != nil {
+		screen.TermMessage(err)
 	}
 
-	optionFlags := make(map[string]*string)
-
-	for k, v := range DefaultGlobalSettings() {
-		optionFlags[k] = flag.String(k, "", fmt.Sprintf("The %s option. Default value: '%v'", k, v))
+	config.InitRuntimeFiles()
+	err = config.ReadSettings()
+	if err != nil {
+		screen.TermMessage(err)
 	}
+	config.InitGlobalSettings()
 
-	flag.Parse()
-
-	if *flagVersion {
-		// If -version was passed
-		fmt.Println("Version:", Version)
-		fmt.Println("Commit hash:", CommitHash)
-		fmt.Println("Compiled on", CompileDate)
-		os.Exit(0)
-	}
-
-	if *flagOptions {
-		// If -options was passed
-		for k, v := range DefaultGlobalSettings() {
-			fmt.Printf("-%s value\n", k)
-			fmt.Printf("    \tThe %s option. Default value: '%v'\n", k, v)
+	// flag options
+	for k, v := range optionFlags {
+		if *v != "" {
+			nativeValue, err := config.GetNativeValue(k, config.DefaultAllSettings()[k], *v)
+			if err != nil {
+				screen.TermMessage(err)
+				continue
+			}
+			config.GlobalSettings[k] = nativeValue
 		}
-		os.Exit(0)
 	}
 
-	// Start the Lua VM for running plugins
-	L = lua.NewState()
-	defer L.Close()
+	DoPluginFlags()
 
-	// Some encoding stuff in case the user isn't using UTF-8
-	encoding.Register()
-	tcell.SetEncodingFallback(tcell.EncodingFallbackASCII)
+	screen.Init()
 
-	// Find the user's configuration directory (probably $XDG_CONFIG_HOME/micro)
-	InitConfigDir()
-
-	// Build a list of available Extensions (Syntax, Colorscheme etc.)
-	InitRuntimeFiles()
-
-	// Load the user's settings
-	InitGlobalSettings()
-
-	InitCommands()
-	InitBindings()
-
-	// Start the screen
-	InitScreen()
-
-	// This is just so if we have an error, we can exit cleanly and not completely
+	// If we have an error, we can exit cleanly and not completely
 	// mess up the terminal being worked in
 	// In other words we need to shut down tcell before the program crashes
 	defer func() {
 		if err := recover(); err != nil {
-			screen.Fini()
+			screen.Screen.Fini()
 			fmt.Println("Micro encountered an error:", err)
+			// backup all open buffers
+			for _, b := range buffer.OpenBuffers {
+				b.Backup(false)
+			}
 			// Print the stack trace too
 			fmt.Print(errors.Wrap(err, 2).ErrorStack())
 			os.Exit(1)
 		}
 	}()
 
-	// Create a new messenger
-	// This is used for sending the user messages in the bottom of the editor
-	messenger = new(Messenger)
-	messenger.LoadHistory()
-
-	// Now we load the input
-	buffers := LoadInput()
-	if len(buffers) == 0 {
-		screen.Fini()
-		os.Exit(1)
+	err = config.LoadAllPlugins()
+	if err != nil {
+		screen.TermMessage(err)
 	}
 
-	for _, buf := range buffers {
-		// For each buffer we create a new tab and place the view in that tab
-		tab := NewTabFromView(NewView(buf))
-		tab.SetNum(len(tabs))
-		tabs = append(tabs, tab)
-		for _, t := range tabs {
-			for _, v := range t.views {
-				v.Center(false)
-			}
+	action.InitBindings()
+	action.InitCommands()
 
-			t.Resize()
-		}
+	err = config.InitColorscheme()
+	if err != nil {
+		screen.TermMessage(err)
 	}
 
-	for k, v := range optionFlags {
-		if *v != "" {
-			SetOption(k, *v)
-		}
+	b := LoadInput()
+
+	if len(b) == 0 {
+		// No buffers to open
+		screen.Screen.Fini()
+		runtime.Goexit()
 	}
 
-	// Load all the plugin stuff
-	// We give plugins access to a bunch of variables here which could be useful to them
-	L.SetGlobal("OS", luar.New(L, runtime.GOOS))
-	L.SetGlobal("tabs", luar.New(L, tabs))
-	L.SetGlobal("curTab", luar.New(L, curTab))
-	L.SetGlobal("messenger", luar.New(L, messenger))
-	L.SetGlobal("GetOption", luar.New(L, GetOption))
-	L.SetGlobal("AddOption", luar.New(L, AddOption))
-	L.SetGlobal("SetOption", luar.New(L, SetOption))
-	L.SetGlobal("SetLocalOption", luar.New(L, SetLocalOption))
-	L.SetGlobal("BindKey", luar.New(L, BindKey))
-	L.SetGlobal("MakeCommand", luar.New(L, MakeCommand))
-	L.SetGlobal("CurView", luar.New(L, CurView))
-	L.SetGlobal("IsWordChar", luar.New(L, IsWordChar))
-	L.SetGlobal("HandleCommand", luar.New(L, HandleCommand))
-	L.SetGlobal("HandleShellCommand", luar.New(L, HandleShellCommand))
-	L.SetGlobal("ExecCommand", luar.New(L, ExecCommand))
-	L.SetGlobal("RunShellCommand", luar.New(L, RunShellCommand))
-	L.SetGlobal("RunBackgroundShell", luar.New(L, RunBackgroundShell))
-	L.SetGlobal("RunInteractiveShell", luar.New(L, RunInteractiveShell))
-	L.SetGlobal("TermEmuSupported", luar.New(L, TermEmuSupported))
-	L.SetGlobal("RunTermEmulator", luar.New(L, RunTermEmulator))
-	L.SetGlobal("GetLeadingWhitespace", luar.New(L, GetLeadingWhitespace))
-	L.SetGlobal("MakeCompletion", luar.New(L, MakeCompletion))
-	L.SetGlobal("NewBuffer", luar.New(L, NewBufferFromString))
-	L.SetGlobal("RuneStr", luar.New(L, func(r rune) string {
-		return string(r)
-	}))
-	L.SetGlobal("Loc", luar.New(L, func(x, y int) Loc {
-		return Loc{x, y}
-	}))
-	L.SetGlobal("WorkingDirectory", luar.New(L, os.Getwd))
-	L.SetGlobal("JoinPaths", luar.New(L, filepath.Join))
-	L.SetGlobal("DirectoryName", luar.New(L, filepath.Dir))
-	L.SetGlobal("configDir", luar.New(L, configDir))
-	L.SetGlobal("Reload", luar.New(L, LoadAll))
-	L.SetGlobal("ByteOffset", luar.New(L, ByteOffset))
-	L.SetGlobal("ToCharPos", luar.New(L, ToCharPos))
+	action.InitTabs(b)
+	action.InitGlobals()
 
-	// Used for asynchronous jobs
-	L.SetGlobal("JobStart", luar.New(L, JobStart))
-	L.SetGlobal("JobSpawn", luar.New(L, JobSpawn))
-	L.SetGlobal("JobSend", luar.New(L, JobSend))
-	L.SetGlobal("JobStop", luar.New(L, JobStop))
-
-	// Extension Files
-	L.SetGlobal("ReadRuntimeFile", luar.New(L, PluginReadRuntimeFile))
-	L.SetGlobal("ListRuntimeFiles", luar.New(L, PluginListRuntimeFiles))
-	L.SetGlobal("AddRuntimeFile", luar.New(L, PluginAddRuntimeFile))
-	L.SetGlobal("AddRuntimeFilesFromDirectory", luar.New(L, PluginAddRuntimeFilesFromDirectory))
-	L.SetGlobal("AddRuntimeFileFromMemory", luar.New(L, PluginAddRuntimeFileFromMemory))
-
-	// Access to Go stdlib
-	L.SetGlobal("import", luar.New(L, Import))
-
-	jobs = make(chan JobFunction, 100)
-	events = make(chan tcell.Event, 100)
-	autosave = make(chan bool)
-	updateterm = make(chan bool)
-	closeterm = make(chan int)
-
-	LoadPlugins()
-
-	for _, t := range tabs {
-		for _, v := range t.views {
-			GlobalPluginCall("onViewOpen", v)
-			GlobalPluginCall("onBufferOpen", v.Buf)
-		}
+	err = config.RunPluginFn("init")
+	if err != nil {
+		screen.TermMessage(err)
 	}
 
-	InitColorscheme()
-	messenger.style = defStyle
+	events = make(chan tcell.Event)
 
 	// Here is the event loop which runs in a separate thread
 	go func() {
 		for {
-			if screen != nil {
-				events <- screen.PollEvent()
+			screen.Lock()
+			e := screen.Screen.PollEvent()
+			screen.Unlock()
+			if e != nil {
+				events <- e
 			}
 		}
 	}()
 
-	go func() {
-		for {
-			time.Sleep(autosaveTime * time.Second)
-			if globalSettings["autosave"].(bool) {
-				autosave <- true
-			}
-		}
-	}()
+	// clear the drawchan so we don't redraw excessively
+	// if someone requested a redraw before we started displaying
+	for len(screen.DrawChan) > 0 {
+		<-screen.DrawChan
+	}
+
+	var event tcell.Event
+
+	// wait for initial resize event
+	select {
+	case event = <-events:
+		action.Tabs.HandleEvent(event)
+	case <-time.After(10 * time.Millisecond):
+		// time out after 10ms
+	}
 
 	for {
 		// Display everything
-		RedrawAll()
+		screen.Screen.Fill(' ', config.DefStyle)
+		screen.Screen.HideCursor()
+		action.Tabs.Display()
+		for _, ep := range action.MainTab().Panes {
+			ep.Display()
+		}
+		action.MainTab().Display()
+		action.InfoBar.Display()
+		screen.Screen.Show()
 
-		var event tcell.Event
+		event = nil
 
 		// Check for new events
 		select {
-		case f := <-jobs:
+		case f := <-shell.Jobs:
 			// If a new job has finished while running in the background we should execute the callback
-			f.function(f.output, f.args...)
-			continue
-		case <-autosave:
-			if CurView().Buf.Path != "" {
-				CurView().Save(true)
+			f.Function(f.Output, f.Args)
+		case <-config.Autosave:
+			for _, b := range buffer.OpenBuffers {
+				b.Save()
 			}
-		case <-updateterm:
-			continue
-		case vnum := <-closeterm:
-			tabs[curTab].views[vnum].CloseTerminal()
+		case <-shell.CloseTerms:
 		case event = <-events:
+		case <-screen.DrawChan:
 		}
 
-		for event != nil {
-			didAction := false
-
-			switch e := event.(type) {
-			case *tcell.EventResize:
-				for _, t := range tabs {
-					t.Resize()
-				}
-			case *tcell.EventMouse:
-				if !searching {
-					if e.Buttons() == tcell.Button1 {
-						// If the user left clicked we check a couple things
-						_, h := screen.Size()
-						x, y := e.Position()
-						if y == h-1 && messenger.message != "" && globalSettings["infobar"].(bool) {
-							// If the user clicked in the bottom bar, and there is a message down there
-							// we copy it to the clipboard.
-							// Often error messages are displayed down there so it can be useful to easily
-							// copy the message
-							clipboard.WriteAll(messenger.message, "primary")
-							break
-						}
-
-						if CurView().mouseReleased {
-							// We loop through each view in the current tab and make sure the current view
-							// is the one being clicked in
-							for _, v := range tabs[curTab].views {
-								if x >= v.x && x < v.x+v.Width && y >= v.y && y < v.y+v.Height {
-									tabs[curTab].CurView = v.Num
-								}
-							}
-						}
-					} else if e.Buttons() == tcell.WheelUp || e.Buttons() == tcell.WheelDown {
-						var view *View
-						x, y := e.Position()
-						for _, v := range tabs[curTab].views {
-							if x >= v.x && x < v.x+v.Width && y >= v.y && y < v.y+v.Height {
-								view = tabs[curTab].views[v.Num]
-							}
-						}
-						if view != nil {
-							view.HandleEvent(e)
-							didAction = true
-						}
-					}
-				}
-			}
-
-			if !didAction {
-				// This function checks the mouse event for the possibility of changing the current tab
-				// If the tab was changed it returns true
-				if TabbarHandleMouseEvent(event) {
-					break
-				}
-
-				if searching {
-					// Since searching is done in real time, we need to redraw every time
-					// there is a new event in the search bar so we need a special function
-					// to run instead of the standard HandleEvent.
-					HandleSearchEvent(event, CurView())
-				} else {
-					// Send it to the view
-					CurView().HandleEvent(event)
-				}
-			}
-
-			select {
-			case event = <-events:
-			default:
-				event = nil
-			}
+		if action.InfoBar.HasPrompt {
+			action.InfoBar.HandleEvent(event)
+		} else {
+			action.Tabs.HandleEvent(event)
 		}
 	}
 }

cmd/micro/plugin.go

@@ -1,184 +0,0 @@
-package main
-
-import (
-	"errors"
-	"io/ioutil"
-	"os"
-	"strings"
-
-	"github.com/yuin/gopher-lua"
-	"github.com/zyedidia/tcell"
-	"layeh.com/gopher-luar"
-)
-
-var loadedPlugins map[string]string
-
-// Call calls the lua function 'function'
-// If it does not exist nothing happens, if there is an error,
-// the error is returned
-func Call(function string, args ...interface{}) (lua.LValue, error) {
-	var luaFunc lua.LValue
-	if strings.Contains(function, ".") {
-		plugin := L.GetGlobal(strings.Split(function, ".")[0])
-		if plugin.String() == "nil" {
-			return nil, errors.New("function does not exist: " + function)
-		}
-		luaFunc = L.GetField(plugin, strings.Split(function, ".")[1])
-	} else {
-		luaFunc = L.GetGlobal(function)
-	}
-
-	if luaFunc.String() == "nil" {
-		return nil, errors.New("function does not exist: " + function)
-	}
-	var luaArgs []lua.LValue
-	for _, v := range args {
-		luaArgs = append(luaArgs, luar.New(L, v))
-	}
-	err := L.CallByParam(lua.P{
-		Fn:      luaFunc,
-		NRet:    1,
-		Protect: true,
-	}, luaArgs...)
-	ret := L.Get(-1) // returned value
-	if ret.String() != "nil" {
-		L.Pop(1) // remove received value
-	}
-	return ret, err
-}
-
-// LuaFunctionBinding is a function generator which takes the name of a lua function
-// and creates a function that will call that lua function
-// Specifically it creates a function that can be called as a binding because this is used
-// to bind keys to lua functions
-func LuaFunctionBinding(function string) func(*View, bool) bool {
-	return func(v *View, _ bool) bool {
-		_, err := Call(function, nil)
-		if err != nil {
-			TermMessage(err)
-		}
-		return false
-	}
-}
-
-// LuaFunctionMouseBinding is a function generator which takes the name of a lua function
-// and creates a function that will call that lua function
-// Specifically it creates a function that can be called as a mouse binding because this is used
-// to bind mouse actions to lua functions
-func LuaFunctionMouseBinding(function string) func(*View, bool, *tcell.EventMouse) bool {
-	return func(v *View, _ bool, e *tcell.EventMouse) bool {
-		_, err := Call(function, e)
-		if err != nil {
-			TermMessage(err)
-		}
-		return false
-	}
-}
-
-func unpack(old []string) []interface{} {
-	new := make([]interface{}, len(old))
-	for i, v := range old {
-		new[i] = v
-	}
-	return new
-}
-
-// LuaFunctionCommand is the same as LuaFunctionBinding except it returns a normal function
-// so that a command can be bound to a lua function
-func LuaFunctionCommand(function string) func([]string) {
-	return func(args []string) {
-		_, err := Call(function, unpack(args)...)
-		if err != nil {
-			TermMessage(err)
-		}
-	}
-}
-
-// LuaFunctionComplete returns a function which can be used for autocomplete in plugins
-func LuaFunctionComplete(function string) func(string) []string {
-	return func(input string) (result []string) {
-
-		res, err := Call(function, input)
-		if err != nil {
-			TermMessage(err)
-		}
-		if tbl, ok := res.(*lua.LTable); !ok {
-			TermMessage(function, "should return a table of strings")
-		} else {
-			for i := 1; i <= tbl.Len(); i++ {
-				val := tbl.RawGetInt(i)
-				if v, ok := val.(lua.LString); !ok {
-					TermMessage(function, "should return a table of strings")
-				} else {
-					result = append(result, string(v))
-				}
-			}
-		}
-		return result
-	}
-}
-
-// LuaFunctionJob returns a function that will call the given lua function
-// structured as a job call i.e. the job output and arguments are provided
-// to the lua function
-func LuaFunctionJob(function string) func(string, ...string) {
-	return func(output string, args ...string) {
-		_, err := Call(function, unpack(append([]string{output}, args...))...)
-		if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
-			TermMessage(err)
-		}
-	}
-}
-
-// luaPluginName convert a human-friendly plugin name into a valid lua variable name.
-func luaPluginName(name string) string {
-	return strings.Replace(name, "-", "_", -1)
-}
-
-// LoadPlugins loads the pre-installed plugins and the plugins located in ~/.config/micro/plugins
-func LoadPlugins() {
-	loadedPlugins = make(map[string]string)
-
-	for _, plugin := range ListRuntimeFiles(RTPlugin) {
-		pluginName := plugin.Name()
-		if _, ok := loadedPlugins[pluginName]; ok {
-			continue
-		}
-
-		data, err := plugin.Data()
-		if err != nil {
-			TermMessage("Error loading plugin: " + pluginName)
-			continue
-		}
-
-		pluginLuaName := luaPluginName(pluginName)
-
-		if err := LoadFile(pluginLuaName, pluginLuaName, string(data)); err != nil {
-			TermMessage(err)
-			continue
-		}
-
-		loadedPlugins[pluginName] = pluginLuaName
-
-	}
-
-	if _, err := os.Stat(configDir + "/init.lua"); err == nil {
-		data, _ := ioutil.ReadFile(configDir + "/init.lua")
-		if err := LoadFile("init", configDir+"init.lua", string(data)); err != nil {
-			TermMessage(err)
-		}
-		loadedPlugins["init"] = "init"
-	}
-}
-
-// GlobalCall makes a call to a function in every plugin that is currently
-// loaded
-func GlobalPluginCall(function string, args ...interface{}) {
-	for pl := range loadedPlugins {
-		_, err := Call(pl+"."+function, args...)
-		if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
-			TermMessage(err)
-			continue
-		}
-	}
-}

cmd/micro/rtfiles.go

@@ -1,207 +0,0 @@
-package main
-
-import (
-	"io/ioutil"
-	"os"
-	"path"
-	"path/filepath"
-)
-
-const (
-	RTColorscheme = "colorscheme"
-	RTSyntax      = "syntax"
-	RTHelp        = "help"
-	RTPlugin      = "plugin"
-)
-
-// RuntimeFile allows the program to read runtime data like colorschemes or syntax files
-type RuntimeFile interface {
-	// Name returns a name of the file without paths or extensions
-	Name() string
-	// Data returns the content of the file.
-	Data() ([]byte, error)
-}
-
-// allFiles contains all available files, mapped by filetype
-var allFiles map[string][]RuntimeFile
-
-// some file on filesystem
-type realFile string
-
-// some asset file
-type assetFile string
-
-// some file on filesystem but with a different name
-type namedFile struct {
-	realFile
-	name string
-}
-
-// a file with the data stored in memory
-type memoryFile struct {
-	name string
-	data []byte
-}
-
-func (mf memoryFile) Name() string {
-	return mf.name
-}
-func (mf memoryFile) Data() ([]byte, error) {
-	return mf.data, nil
-}
-
-func (rf realFile) Name() string {
-	fn := filepath.Base(string(rf))
-	return fn[:len(fn)-len(filepath.Ext(fn))]
-}
-
-func (rf realFile) Data() ([]byte, error) {
-	return ioutil.ReadFile(string(rf))
-}
-
-func (af assetFile) Name() string {
-	fn := path.Base(string(af))
-	return fn[:len(fn)-len(path.Ext(fn))]
-}
-
-func (af assetFile) Data() ([]byte, error) {
-	return Asset(string(af))
-}
-
-func (nf namedFile) Name() string {
-	return nf.name
-}
-
-// AddRuntimeFile registers a file for the given filetype
-func AddRuntimeFile(fileType string, file RuntimeFile) {
-	if allFiles == nil {
-		allFiles = make(map[string][]RuntimeFile)
-	}
-	allFiles[fileType] = append(allFiles[fileType], file)
-}
-
-// AddRuntimeFilesFromDirectory registers each file from the given directory for
-// the filetype which matches the file-pattern
-func AddRuntimeFilesFromDirectory(fileType, directory, pattern string) {
-	files, _ := ioutil.ReadDir(directory)
-	for _, f := range files {
-		if ok, _ := filepath.Match(pattern, f.Name()); !f.IsDir() && ok {
-			fullPath := filepath.Join(directory, f.Name())
-			AddRuntimeFile(fileType, realFile(fullPath))
-		}
-	}
-}
-
-// AddRuntimeFilesFromAssets registers each file from the given asset-directory for
-// the filetype which matches the file-pattern
-func AddRuntimeFilesFromAssets(fileType, directory, pattern string) {
-	files, err := AssetDir(directory)
-	if err != nil {
-		return
-	}
-	for _, f := range files {
-		if ok, _ := path.Match(pattern, f); ok {
-			AddRuntimeFile(fileType, assetFile(path.Join(directory, f)))
-		}
-	}
-}
-
-// FindRuntimeFile finds a runtime file of the given filetype and name
-// will return nil if no file was found
-func FindRuntimeFile(fileType, name string) RuntimeFile {
-	for _, f := range ListRuntimeFiles(fileType) {
-		if f.Name() == name {
-			return f
-		}
-	}
-	return nil
-}
-
-// ListRuntimeFiles lists all known runtime files for the given filetype
-func ListRuntimeFiles(fileType string) []RuntimeFile {
-	if files, ok := allFiles[fileType]; ok {
-		return files
-	}
-	return []RuntimeFile{}
-}
-
-// InitRuntimeFiles initializes all assets file and the config directory
-func InitRuntimeFiles() {
-	add := func(fileType, dir, pattern string) {
-		AddRuntimeFilesFromDirectory(fileType, filepath.Join(configDir, dir), pattern)
-		AddRuntimeFilesFromAssets(fileType, path.Join("runtime", dir), pattern)
-	}
-
-	add(RTColorscheme, "colorschemes", "*.micro")
-	add(RTSyntax, "syntax", "*.yaml")
-	add(RTHelp, "help", "*.md")
-
-	// Search configDir for plugin-scripts
-	files, _ := ioutil.ReadDir(filepath.Join(configDir, "plugins"))
-	for _, f := range files {
-		realpath, _ := filepath.EvalSymlinks(filepath.Join(configDir, "plugins", f.Name()))
-		realpathStat, _ := os.Stat(realpath)
-		if realpathStat.IsDir() {
-			scriptPath := filepath.Join(configDir, "plugins", f.Name(), f.Name()+".lua")
-			if _, err := os.Stat(scriptPath); err == nil {
-				AddRuntimeFile(RTPlugin, realFile(scriptPath))
-			}
-		}
-	}
-
-	if files, err := AssetDir("runtime/plugins"); err == nil {
-		for _, f := range files {
-			scriptPath := path.Join("runtime/plugins", f, f+".lua")
-			if _, err := AssetInfo(scriptPath); err == nil {
-				AddRuntimeFile(RTPlugin, assetFile(scriptPath))
-			}
-		}
-	}
-}
-
-// PluginReadRuntimeFile allows plugin scripts to read the content of a runtime file
-func PluginReadRuntimeFile(fileType, name string) string {
-	if file := FindRuntimeFile(fileType, name); file != nil {
-		if data, err := file.Data(); err == nil {
-			return string(data)
-		}
-	}
-	return ""
-}
-
-// PluginListRuntimeFiles allows plugins to lists all runtime files of the given type
-func PluginListRuntimeFiles(fileType string) []string {
-	files := ListRuntimeFiles(fileType)
-	result := make([]string, len(files))
-	for i, f := range files {
-		result[i] = f.Name()
-	}
-	return result
-}
-
-// PluginAddRuntimeFile adds a file to the runtime files for a plugin
-func PluginAddRuntimeFile(plugin, filetype, filePath string) {
-	fullpath := filepath.Join(configDir, "plugins", plugin, filePath)
-	if _, err := os.Stat(fullpath); err == nil {
-		AddRuntimeFile(filetype, realFile(fullpath))
-	} else {
-		fullpath = path.Join("runtime", "plugins", plugin, filePath)
-		AddRuntimeFile(filetype, assetFile(fullpath))
-	}
-}
-
-// PluginAddRuntimeFilesFromDirectory adds files from a directory to the runtime files for a plugin
-func PluginAddRuntimeFilesFromDirectory(plugin, filetype, directory, pattern string) {
-	fullpath := filepath.Join(configDir, "plugins", plugin, directory)
-	if _, err := os.Stat(fullpath); err == nil {
-		AddRuntimeFilesFromDirectory(filetype, fullpath, pattern)
-	} else {
-		fullpath = path.Join("runtime", "plugins", plugin, directory)
-		AddRuntimeFilesFromAssets(filetype, fullpath, pattern)
-	}
-}
-
-// PluginAddRuntimeFileFromMemory adds a file to the runtime files for a plugin from a given string
-func PluginAddRuntimeFileFromMemory(plugin, filetype, filename, data string) {
-	AddRuntimeFile(filetype, memoryFile{filename, []byte(data)})
-}

cmd/micro/scrollbar.go

@@ -1,20 +0,0 @@
-package main
-
-// ScrollBar represents an optional scrollbar that can be used
-type ScrollBar struct {
-	view *View
-}
-
-// Display shows the scrollbar
-func (sb *ScrollBar) Display() {
-	style := defStyle.Reverse(true)
-	screen.SetContent(sb.view.x+sb.view.Width-1, sb.view.y+sb.pos(), ' ', nil, style)
-}
-
-func (sb *ScrollBar) pos() int {
-	numlines := sb.view.Buf.NumLines
-	h := sb.view.Height
-	filepercent := float32(sb.view.Topline) / float32(numlines)
-
-	return int(filepercent * float32(h))
-}

cmd/micro/search.go

@@ -1,190 +0,0 @@
-package main
-
-import (
-	"regexp"
-	"strings"
-
-	"github.com/zyedidia/tcell"
-)
-
-var (
-	// What was the last search
-	lastSearch string
-
-	// Where should we start the search down from (or up from)
-	searchStart Loc
-
-	// Is there currently a search in progress
-	searching bool
-
-	// Stores the history for searching
-	searchHistory []string
-)
-
-// BeginSearch starts a search
-func BeginSearch(searchStr string) {
-	searchHistory = append(searchHistory, "")
-	messenger.historyNum = len(searchHistory) - 1
-	searching = true
-	messenger.response = searchStr
-	messenger.cursorx = Count(searchStr)
-	messenger.Message("Find: ")
-	messenger.hasPrompt = true
-}
-
-// EndSearch stops the current search
-func EndSearch() {
-	searchHistory[len(searchHistory)-1] = messenger.response
-	searching = false
-	messenger.hasPrompt = false
-	messenger.Clear()
-	messenger.Reset()
-	if lastSearch != "" {
-		messenger.Message("^P Previous ^N Next")
-	}
-}
-
-// ExitSearch exits the search mode, reset active search phrase, and clear status bar
-func ExitSearch(v *View) {
-	lastSearch = ""
-	searching = false
-	messenger.hasPrompt = false
-	messenger.Clear()
-	messenger.Reset()
-	v.Cursor.ResetSelection()
-}
-
-// HandleSearchEvent takes an event and a view and will do a real time match from the messenger's output
-// to the current buffer. It searches down the buffer.
-func HandleSearchEvent(event tcell.Event, v *View) {
-	switch e := event.(type) {
-	case *tcell.EventKey:
-		switch e.Key() {
-		case tcell.KeyEscape:
-			// Exit the search mode
-			ExitSearch(v)
-			return
-		case tcell.KeyEnter:
-			// If the user has pressed Enter, they want this to be the lastSearch
-			lastSearch = messenger.response
-			EndSearch()
-			return
-		case tcell.KeyCtrlQ, tcell.KeyCtrlC:
-			// Done
-			EndSearch()
-			return
-		}
-	}
-
-	messenger.HandleEvent(event, searchHistory)
-
-	if messenger.cursorx < 0 {
-		// Done
-		EndSearch()
-		return
-	}
-
-	if messenger.response == "" {
-		v.Cursor.ResetSelection()
-		// We don't end the search though
-		return
-	}
-
-	Search(messenger.response, v, true)
-
-	v.Relocate()
-
-	return
-}
-
-func searchDown(r *regexp.Regexp, v *View, start, end Loc) bool {
-	for i := start.Y; i <= end.Y; i++ {
-		var l []byte
-		var charPos int
-		if i == start.Y {
-			runes := []rune(string(v.Buf.lines[i].data))
-			l = []byte(string(runes[start.X:]))
-			charPos = start.X
-
-			if strings.Contains(r.String(), "^") && start.X != 0 {
-				continue
-			}
-		} else {
-			l = v.Buf.lines[i].data
-		}
-
-		match := r.FindIndex(l)
-
-		if match != nil {
-			v.Cursor.SetSelectionStart(Loc{charPos + runePos(match[0], string(l)), i})
-			v.Cursor.SetSelectionEnd(Loc{charPos + runePos(match[1], string(l)), i})
-			v.Cursor.OrigSelection[0] = v.Cursor.CurSelection[0]
-			v.Cursor.OrigSelection[1] = v.Cursor.CurSelection[1]
-			v.Cursor.Loc = v.Cursor.CurSelection[1]
-
-			return true
-		}
-	}
-	return false
-}
-
-func searchUp(r *regexp.Regexp, v *View, start, end Loc) bool {
-	for i := start.Y; i >= end.Y; i-- {
-		var l []byte
-		if i == start.Y {
-			runes := []rune(string(v.Buf.lines[i].data))
-			l = []byte(string(runes[:start.X]))
-
-			if strings.Contains(r.String(), "$") && start.X != Count(string(l)) {
-				continue
-			}
-		} else {
-			l = v.Buf.lines[i].data
-		}
-
-		match := r.FindIndex(l)
-
-		if match != nil {
-			v.Cursor.SetSelectionStart(Loc{runePos(match[0], string(l)), i})
-			v.Cursor.SetSelectionEnd(Loc{runePos(match[1], string(l)), i})
-			v.Cursor.OrigSelection[0] = v.Cursor.CurSelection[0]
-			v.Cursor.OrigSelection[1] = v.Cursor.CurSelection[1]
-			v.Cursor.Loc = v.Cursor.CurSelection[1]
-
-			return true
-		}
-	}
-	return false
-}
-
-// Search searches in the view for the given regex. The down bool
-// specifies whether it should search down from the searchStart position
-// or up from there
-func Search(searchStr string, v *View, down bool) {
-	if searchStr == "" {
-		return
-	}
-	r, err := regexp.Compile(searchStr)
-	if v.Buf.Settings["ignorecase"].(bool) {
-		r, err = regexp.Compile("(?i)" + searchStr)
-	}
-	if err != nil {
-		return
-	}
-
-	var found bool
-	if down {
-		found = searchDown(r, v, searchStart, v.Buf.End())
-		if !found {
-			found = searchDown(r, v, v.Buf.Start(), searchStart)
-		}
-	} else {
-		found = searchUp(r, v, searchStart, v.Buf.Start())
-		if !found {
-			found = searchUp(r, v, v.Buf.End(), searchStart)
-		}
-	}
-	if !found {
-		v.Cursor.ResetSelection()
-	}
-}

cmd/micro/settings.go

@@ -1,517 +0,0 @@
-package main
-
-import (
-	"crypto/md5"
-	"encoding/json"
-	"errors"
-	"io/ioutil"
-	"os"
-	"reflect"
-	"strconv"
-	"strings"
-
-	"github.com/flynn/json5"
-	"github.com/zyedidia/glob"
-)
-
-type optionValidator func(string, interface{}) error
-
-// The options that the user can set
-var globalSettings map[string]interface{}
-
-var invalidSettings bool
-
-// Options with validators
-var optionValidators = map[string]optionValidator{
-	"tabsize":      validatePositiveValue,
-	"scrollmargin": validateNonNegativeValue,
-	"scrollspeed":  validateNonNegativeValue,
-	"colorscheme":  validateColorscheme,
-	"colorcolumn":  validateNonNegativeValue,
-	"fileformat":   validateLineEnding,
-}
-
-// InitGlobalSettings initializes the options map and sets all options to their default values
-func InitGlobalSettings() {
-	invalidSettings = false
-	defaults := DefaultGlobalSettings()
-	var parsed map[string]interface{}
-
-	filename := configDir + "/settings.json"
-	writeSettings := false
-	if _, e := os.Stat(filename); e == nil {
-		input, err := ioutil.ReadFile(filename)
-		if !strings.HasPrefix(string(input), "null") {
-			if err != nil {
-				TermMessage("Error reading settings.json file: " + err.Error())
-				invalidSettings = true
-				return
-			}
-
-			err = json5.Unmarshal(input, &parsed)
-			if err != nil {
-				TermMessage("Error reading settings.json:", err.Error())
-				invalidSettings = true
-			}
-		} else {
-			writeSettings = true
-		}
-	}
-
-	globalSettings = make(map[string]interface{})
-	for k, v := range defaults {
-		globalSettings[k] = v
-	}
-	for k, v := range parsed {
-		if !strings.HasPrefix(reflect.TypeOf(v).String(), "map") {
-			globalSettings[k] = v
-		}
-	}
-
-	if _, err := os.Stat(filename); os.IsNotExist(err) || writeSettings {
-		err := WriteSettings(filename)
-		if err != nil {
-			TermMessage("Error writing settings.json file: " + err.Error())
-		}
-	}
-}
-
-// InitLocalSettings scans the json in settings.json and sets the options locally based
-// on whether the buffer matches the glob
-func InitLocalSettings(buf *Buffer) {
-	invalidSettings = false
-	var parsed map[string]interface{}
-
-	filename := configDir + "/settings.json"
-	if _, e := os.Stat(filename); e == nil {
-		input, err := ioutil.ReadFile(filename)
-		if err != nil {
-			TermMessage("Error reading settings.json file: " + err.Error())
-			invalidSettings = true
-			return
-		}
-
-		err = json5.Unmarshal(input, &parsed)
-		if err != nil {
-			TermMessage("Error reading settings.json:", err.Error())
-			invalidSettings = true
-		}
-	}
-
-	for k, v := range parsed {
-		if strings.HasPrefix(reflect.TypeOf(v).String(), "map") {
-			if strings.HasPrefix(k, "ft:") {
-				if buf.Settings["filetype"].(string) == k[3:] {
-					for k1, v1 := range v.(map[string]interface{}) {
-						buf.Settings[k1] = v1
-					}
-				}
-			} else {
-				g, err := glob.Compile(k)
-				if err != nil {
-					TermMessage("Error with glob setting ", k, ": ", err)
-					continue
-				}
-
-				if g.MatchString(buf.Path) {
-					for k1, v1 := range v.(map[string]interface{}) {
-						buf.Settings[k1] = v1
-					}
-				}
-			}
-		}
-	}
-}
-
-// WriteSettings writes the settings to the specified filename as JSON
-func WriteSettings(filename string) error {
-	if invalidSettings {
-		// Do not write the settings if there was an error when reading them
-		return nil
-	}
-
-	var err error
-	if _, e := os.Stat(configDir); e == nil {
-		parsed := make(map[string]interface{})
-
-		filename := configDir + "/settings.json"
-		for k, v := range globalSettings {
-			parsed[k] = v
-		}
-		if _, e := os.Stat(filename); e == nil {
-			input, err := ioutil.ReadFile(filename)
-			if string(input) != "null" {
-				if err != nil {
-					return err
-				}
-
-				err = json5.Unmarshal(input, &parsed)
-				if err != nil {
-					TermMessage("Error reading settings.json:", err.Error())
-					invalidSettings = true
-				}
-
-				for k, v := range parsed {
-					if !strings.HasPrefix(reflect.TypeOf(v).String(), "map") {
-						if _, ok := globalSettings[k]; ok {
-							parsed[k] = globalSettings[k]
-						}
-					}
-				}
-			}
-		}
-
-		txt, _ := json.MarshalIndent(parsed, "", "    ")
-		err = ioutil.WriteFile(filename, append(txt, '\n'), 0644)
-	}
-	return err
-}
-
-// AddOption creates a new option. This is meant to be called by plugins to add options.
-func AddOption(name string, value interface{}) {
-	globalSettings[name] = value
-	err := WriteSettings(configDir + "/settings.json")
-	if err != nil {
-		TermMessage("Error writing settings.json file: " + err.Error())
-	}
-}
-
-// GetGlobalOption returns the global value of the given option
-func GetGlobalOption(name string) interface{} {
-	return globalSettings[name]
-}
-
-// GetLocalOption returns the local value of the given option
-func GetLocalOption(name string, buf *Buffer) interface{} {
-	return buf.Settings[name]
-}
-
-// GetOption returns the value of the given option
-// If there is a local version of the option, it returns that
-// otherwise it will return the global version
-func GetOption(name string) interface{} {
-	if GetLocalOption(name, CurView().Buf) != nil {
-		return GetLocalOption(name, CurView().Buf)
-	}
-	return GetGlobalOption(name)
-}
-
-// DefaultGlobalSettings returns the default global settings for micro
-// Note that colorscheme is a global only option
-func DefaultGlobalSettings() map[string]interface{} {
-	return map[string]interface{}{
-		"autoindent":     true,
-		"autosave":       false,
-		"basename":       false,
-		"colorcolumn":    float64(0),
-		"colorscheme":    "default",
-		"cursorline":     true,
-		"eofnewline":     false,
-		"fastdirty":      true,
-		"fileformat":     "unix",
-		"ignorecase":     false,
-		"indentchar":     " ",
-		"infobar":        true,
-		"keepautoindent": false,
-		"keymenu":        false,
-		"matchbrace":     false,
-		"mouse":          true,
-		"pluginchannels": []string{"https://raw.githubusercontent.com/micro-editor/plugin-channel/master/channel.json"},
-		"pluginrepos":    []string{},
-		"rmtrailingws":   false,
-		"ruler":          true,
-		"savecursor":     false,
-		"savehistory":    true,
-		"saveundo":       false,
-		"scrollbar":      false,
-		"scrollmargin":   float64(3),
-		"scrollspeed":    float64(2),
-		"softwrap":       false,
-		"splitbottom":    true,
-		"splitright":     true,
-		"statusline":     true,
-		"sucmd":          "sudo",
-		"syntax":         true,
-		"tabmovement":    false,
-		"tabsize":        float64(4),
-		"tabstospaces":   false,
-		"termtitle":      false,
-		"useprimary":     true,
-	}
-}
-
-// DefaultLocalSettings returns the default local settings
-// Note that filetype is a local only option
-func DefaultLocalSettings() map[string]interface{} {
-	return map[string]interface{}{
-		"autoindent":     true,
-		"autosave":       false,
-		"basename":       false,
-		"colorcolumn":    float64(0),
-		"cursorline":     true,
-		"eofnewline":     false,
-		"fastdirty":      true,
-		"fileformat":     "unix",
-		"filetype":       "Unknown",
-		"ignorecase":     false,
-		"indentchar":     " ",
-		"keepautoindent": false,
-		"matchbrace":     false,
-		"rmtrailingws":   false,
-		"ruler":          true,
-		"savecursor":     false,
-		"saveundo":       false,
-		"scrollbar":      false,
-		"scrollmargin":   float64(3),
-		"scrollspeed":    float64(2),
-		"softwrap":       false,
-		"splitbottom":    true,
-		"splitright":     true,
-		"statusline":     true,
-		"syntax":         true,
-		"tabmovement":    false,
-		"tabsize":        float64(4),
-		"tabstospaces":   false,
-		"useprimary":     true,
-	}
-}
-
-// SetOption attempts to set the given option to the value
-// By default it will set the option as global, but if the option
-// is local only it will set the local version
-// Use setlocal to force an option to be set locally
-func SetOption(option, value string) error {
-	if _, ok := globalSettings[option]; !ok {
-		if _, ok := CurView().Buf.Settings[option]; !ok {
-			return errors.New("Invalid option")
-		}
-		SetLocalOption(option, value, CurView())
-		return nil
-	}
-
-	var nativeValue interface{}
-
-	kind := reflect.TypeOf(globalSettings[option]).Kind()
-	if kind == reflect.Bool {
-		b, err := ParseBool(value)
-		if err != nil {
-			return errors.New("Invalid value")
-		}
-		nativeValue = b
-	} else if kind == reflect.String {
-		nativeValue = value
-	} else if kind == reflect.Float64 {
-		i, err := strconv.Atoi(value)
-		if err != nil {
-			return errors.New("Invalid value")
-		}
-		nativeValue = float64(i)
-	} else {
-		return errors.New("Option has unsupported value type")
-	}
-
-	if err := optionIsValid(option, nativeValue); err != nil {
-		return err
-	}
-
-	globalSettings[option] = nativeValue
-
-	if option == "colorscheme" {
-		// LoadSyntaxFiles()
-		InitColorscheme()
-		for _, tab := range tabs {
-			for _, view := range tab.views {
-				view.Buf.UpdateRules()
-			}
-		}
-	}
-
-	if option == "infobar" || option == "keymenu" {
-		for _, tab := range tabs {
-			tab.Resize()
-		}
-	}
-
-	if option == "mouse" {
-		if !nativeValue.(bool) {
-			screen.DisableMouse()
-		} else {
-			screen.EnableMouse()
-		}
-	}
-
-	if len(tabs) != 0 {
-		if _, ok := CurView().Buf.Settings[option]; ok {
-			for _, tab := range tabs {
-				for _, view := range tab.views {
-					SetLocalOption(option, value, view)
-				}
-			}
-		}
-	}
-
-	return nil
-}
-
-// SetLocalOption sets the local version of this option
-func SetLocalOption(option, value string, view *View) error {
-	buf := view.Buf
-	if _, ok := buf.Settings[option]; !ok {
-		return errors.New("Invalid option")
-	}
-
-	var nativeValue interface{}
-
-	kind := reflect.TypeOf(buf.Settings[option]).Kind()
-	if kind == reflect.Bool {
-		b, err := ParseBool(value)
-		if err != nil {
-			return errors.New("Invalid value")
-		}
-		nativeValue = b
-	} else if kind == reflect.String {
-		nativeValue = value
-	} else if kind == reflect.Float64 {
-		i, err := strconv.Atoi(value)
-		if err != nil {
-			return errors.New("Invalid value")
-		}
-		nativeValue = float64(i)
-	} else {
-		return errors.New("Option has unsupported value type")
-	}
-
-	if err := optionIsValid(option, nativeValue); err != nil {
-		return err
-	}
-
-	if option == "fastdirty" {
-		// If it is being turned off, we have to hash every open buffer
-		var empty [16]byte
-		for _, tab := range tabs {
-			for _, v := range tab.views {
-				if !nativeValue.(bool) {
-					if v.Buf.origHash == empty {
-						data, err := ioutil.ReadFile(v.Buf.AbsPath)
-						if err != nil {
-							data = []byte{}
-						}
-						v.Buf.origHash = md5.Sum(data)
-					}
-				} else {
-					v.Buf.IsModified = v.Buf.Modified()
-				}
-			}
-		}
-	}
-
-	buf.Settings[option] = nativeValue
-
-	if option == "statusline" {
-		view.ToggleStatusLine()
-	}
-
-	if option == "filetype" {
-		// LoadSyntaxFiles()
-		InitColorscheme()
-		buf.UpdateRules()
-	}
-
-	if option == "fileformat" {
-		buf.IsModified = true
-	}
-
-	if option == "syntax" {
-		if !nativeValue.(bool) {
-			buf.ClearMatches()
-		} else {
-			buf.highlighter.HighlightStates(buf)
-		}
-	}
-
-	return nil
-}
-
-// SetOptionAndSettings sets the given option and saves the option setting to the settings config file
-func SetOptionAndSettings(option, value string) {
-	filename := configDir + "/settings.json"
-
-	err := SetOption(option, value)
-
-	if err != nil {
-		messenger.Error(err.Error())
-		return
-	}
-
-	err = WriteSettings(filename)
-	if err != nil {
-		messenger.Error("Error writing to settings.json: " + err.Error())
-		return
-	}
-}
-
-func optionIsValid(option string, value interface{}) error {
-	if validator, ok := optionValidators[option]; ok {
-		return validator(option, value)
-	}
-
-	return nil
-}
-
-// Option validators
-
-func validatePositiveValue(option string, value interface{}) error {
-	tabsize, ok := value.(float64)
-
-	if !ok {
-		return errors.New("Expected numeric type for " + option)
-	}
-
-	if tabsize < 1 {
-		return errors.New(option + " must be greater than 0")
-	}
-
-	return nil
-}
-
-func validateNonNegativeValue(option string, value interface{}) error {
-	nativeValue, ok := value.(float64)
-
-	if !ok {
-		return errors.New("Expected numeric type for " + option)
-	}
-
-	if nativeValue < 0 {
-		return errors.New(option + " must be non-negative")
-	}
-
-	return nil
-}
-
-func validateColorscheme(option string, value interface{}) error {
-	colorscheme, ok := value.(string)
-
-	if !ok {
-		return errors.New("Expected string type for colorscheme")
-	}
-
-	if !ColorschemeExists(colorscheme) {
-		return errors.New(colorscheme + " is not a valid colorscheme")
-	}
-
-	return nil
-}
-
-func validateLineEnding(option string, value interface{}) error {
-	endingType, ok := value.(string)
-
-	if !ok {
-		return errors.New("Expected string type for file format")
-	}
-
-	if endingType != "unix" && endingType != "dos" {
-		return errors.New("File format must be either 'unix' or 'dos'")
-	}
-
-	return nil
-}

cmd/micro/shell_supported.go

@@ -1,18 +0,0 @@
-// +build linux darwin dragonfly openbsd_amd64 freebsd
-
-package main
-
-import (
-	"github.com/zyedidia/micro/cmd/micro/shellwords"
-)
-
-const TermEmuSupported = true
-
-func RunTermEmulator(input string, wait bool, getOutput bool, callback string) error {
-	args, err := shellwords.Split(input)
-	if err != nil {
-		return err
-	}
-	err = CurView().StartTerminal(args, wait, getOutput, callback)
-	return err
-}

cmd/micro/shell_unsupported.go

@@ -1,11 +0,0 @@
-// +build !linux,!darwin,!freebsd,!dragonfly,!openbsd_amd64
-
-package main
-
-import "errors"
-
-const TermEmuSupported = false
-
-func RunTermEmulator(input string, wait bool, getOutput bool) error {
-	return errors.New("Unsupported operating system")
-}

cmd/micro/shellwords/LICENSE

@@ -1,21 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2017 Yasuhiro Matsumoto
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

cmd/micro/shellwords/README.md

@@ -1,49 +0,0 @@
-This is a modified version of `go-shellwords` for the micro editor.
-
-# go-shellwords
-
-[![Coverage Status](https://coveralls.io/repos/mattn/go-shellwords/badge.png?branch=master)](https://coveralls.io/r/mattn/go-shellwords?branch=master)
-[![Build Status](https://travis-ci.org/mattn/go-shellwords.svg?branch=master)](https://travis-ci.org/mattn/go-shellwords)
-
-Parse line as shell words.
-
-## Usage
-
-```go
-args, err := shellwords.Parse("./foo --bar=baz")
-// args should be ["./foo", "--bar=baz"]
-```
-
-```go
-os.Setenv("FOO", "bar")
-p := shellwords.NewParser()
-p.ParseEnv = true
-args, err := p.Parse("./foo $FOO")
-// args should be ["./foo", "bar"]
-```
-
-```go
-p := shellwords.NewParser()
-p.ParseBacktick = true
-args, err := p.Parse("./foo `echo $SHELL`")
-// args should be ["./foo", "/bin/bash"]
-```
-
-```go
-shellwords.ParseBacktick = true
-p := shellwords.NewParser()
-args, err := p.Parse("./foo `echo $SHELL`")
-// args should be ["./foo", "/bin/bash"]
-```
-
-# Thanks
-
-This is based on cpan module [Parse::CommandLine](https://metacpan.org/pod/Parse::CommandLine).
-
-# License
-
-under the MIT License: http://mattn.mit-license.org/2017
-
-# Author
-
-Yasuhiro Matsumoto (a.k.a mattn)

cmd/micro/shellwords/shellwords.go

@@ -1,180 +0,0 @@
-package shellwords
-
-import (
-	"bytes"
-	"errors"
-	"os"
-	"regexp"
-)
-
-var envRe = regexp.MustCompile(`\$({[a-zA-Z0-9_]+}|[a-zA-Z0-9_]+)`)
-
-func isSpace(r rune) bool {
-	switch r {
-	case ' ', '\t', '\r', '\n':
-		return true
-	}
-	return false
-}
-
-func replaceEnv(s string) string {
-	return envRe.ReplaceAllStringFunc(s, func(s string) string {
-		s = s[1:]
-		if s[0] == '{' {
-			s = s[1 : len(s)-1]
-		}
-		return os.Getenv(s)
-	})
-}
-
-type Parser struct {
-	Position int
-}
-
-func NewParser() *Parser {
-	return &Parser{0}
-}
-
-func (p *Parser) Parse(line string) ([]string, error) {
-	args := []string{}
-	buf := ""
-	var escaped, doubleQuoted, singleQuoted, backQuote, dollarQuote bool
-	backtick := ""
-
-	pos := -1
-	got := false
-
-loop:
-	for i, r := range line {
-		if escaped {
-			buf += string(r)
-			escaped = false
-			continue
-		}
-
-		if r == '\\' {
-			if singleQuoted {
-				buf += string(r)
-			} else {
-				escaped = true
-			}
-			continue
-		}
-
-		if isSpace(r) {
-			if singleQuoted || doubleQuoted || backQuote || dollarQuote {
-				buf += string(r)
-				backtick += string(r)
-			} else if got {
-				buf = replaceEnv(buf)
-				args = append(args, buf)
-				buf = ""
-				got = false
-			}
-			continue
-		}
-
-		switch r {
-		case '`':
-			if !singleQuoted && !doubleQuoted && !dollarQuote {
-				if backQuote {
-					out, err := shellRun(backtick)
-					if err != nil {
-						return nil, err
-					}
-					buf = out
-				}
-				backtick = ""
-				backQuote = !backQuote
-				continue
-				backtick = ""
-				backQuote = !backQuote
-			}
-		case ')':
-			if !singleQuoted && !doubleQuoted && !backQuote {
-				if dollarQuote {
-					out, err := shellRun(backtick)
-					if err != nil {
-						return nil, err
-					}
-					buf = out
-				}
-				backtick = ""
-				dollarQuote = !dollarQuote
-				continue
-				backtick = ""
-				dollarQuote = !dollarQuote
-			}
-		case '(':
-			if !singleQuoted && !doubleQuoted && !backQuote {
-				if !dollarQuote && len(buf) > 0 && buf == "$" {
-					dollarQuote = true
-					buf += "("
-					continue
-				} else {
-					return nil, errors.New("invalid command line string")
-				}
-			}
-		case '"':
-			if !singleQuoted && !dollarQuote {
-				doubleQuoted = !doubleQuoted
-				continue
-			}
-		case '\'':
-			if !doubleQuoted && !dollarQuote {
-				singleQuoted = !singleQuoted
-				continue
-			}
-		case ';', '&', '|', '<', '>':
-			if !(escaped || singleQuoted || doubleQuoted || backQuote) {
-				pos = i
-				break loop
-			}
-		}
-
-		got = true
-		buf += string(r)
-		if backQuote || dollarQuote {
-			backtick += string(r)
-		}
-	}
-
-	buf = replaceEnv(buf)
-	args = append(args, buf)
-
-	if escaped || singleQuoted || doubleQuoted || backQuote || dollarQuote {
-		return nil, errors.New("invalid command line string")
-	}
-
-	p.Position = pos
-
-	return args, nil
-}
-
-func Split(line string) ([]string, error) {
-	return NewParser().Parse(line)
-}
-
-func Join(args ...string) string {
-	var buf bytes.Buffer
-	for i, w := range args {
-		if i != 0 {
-			buf.WriteByte(' ')
-		}
-		if w == "" {
-			buf.WriteString("''")
-			continue
-		}
-
-		for _, b := range w {
-			switch b {
-			case ' ', '\t', '\r', '\n':
-				buf.WriteByte('\\')
-				buf.WriteString(string(b))
-			default:
-				buf.WriteString(string(b))
-			}
-		}
-	}
-	return buf.String()
-}

cmd/micro/shellwords/shellwords_test.go

@@ -1,229 +0,0 @@
-package shellwords
-
-import (
-	"os"
-	"reflect"
-	"testing"
-)
-
-var testcases = []struct {
-	line     string
-	expected []string
-}{
-	{`var --bar=baz`, []string{`var`, `--bar=baz`}},
-	{`var --bar="baz"`, []string{`var`, `--bar=baz`}},
-	{`var "--bar=baz"`, []string{`var`, `--bar=baz`}},
-	{`var "--bar='baz'"`, []string{`var`, `--bar='baz'`}},
-	{"var --bar=`baz`", []string{`var`, "--bar=`baz`"}},
-	{`var "--bar=\"baz'"`, []string{`var`, `--bar="baz'`}},
-	{`var "--bar=\'baz\'"`, []string{`var`, `--bar='baz'`}},
-	{`var --bar='\'`, []string{`var`, `--bar=\`}},
-	{`var "--bar baz"`, []string{`var`, `--bar baz`}},
-	{`var --"bar baz"`, []string{`var`, `--bar baz`}},
-	{`var  --"bar baz"`, []string{`var`, `--bar baz`}},
-}
-
-func TestSimple(t *testing.T) {
-	for _, testcase := range testcases {
-		args, err := Parse(testcase.line)
-		if err != nil {
-			t.Fatal(err)
-		}
-		if !reflect.DeepEqual(args, testcase.expected) {
-			t.Fatalf("Expected %#v, but %#v:", testcase.expected, args)
-		}
-	}
-}
-
-func TestError(t *testing.T) {
-	_, err := Parse("foo '")
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-	_, err = Parse(`foo "`)
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-
-	_, err = Parse("foo `")
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-}
-
-func TestLastSpace(t *testing.T) {
-	args, err := Parse("foo bar\\  ")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(args) != 2 {
-		t.Fatal("Should have two elements")
-	}
-	if args[0] != "foo" {
-		t.Fatal("1st element should be `foo`")
-	}
-	if args[1] != "bar " {
-		t.Fatal("1st element should be `bar `")
-	}
-}
-
-func TestBacktick(t *testing.T) {
-	goversion, err := shellRun("go version")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	parser := NewParser()
-	parser.ParseBacktick = true
-	args, err := parser.Parse("echo `go version`")
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected := []string{"echo", goversion}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-
-	args, err = parser.Parse(`echo $(echo foo)`)
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected = []string{"echo", "foo"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-
-	parser.ParseBacktick = false
-	args, err = parser.Parse(`echo $(echo "foo")`)
-	expected = []string{"echo", `$(echo "foo")`}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-	args, err = parser.Parse("echo $(`echo1)")
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected = []string{"echo", "$(`echo1)"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-}
-
-func TestBacktickError(t *testing.T) {
-	parser := NewParser()
-	parser.ParseBacktick = true
-	_, err := parser.Parse("echo `go Version`")
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-	expected := "exit status 2:go: unknown subcommand \"Version\"\nRun 'go help' for usage.\n"
-	if expected != err.Error() {
-		t.Fatalf("Expected %q, but %q", expected, err.Error())
-	}
-	_, err = parser.Parse(`echo $(echo1)`)
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-	_, err = parser.Parse(`echo $(echo1`)
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-	_, err = parser.Parse(`echo $ (echo1`)
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-	_, err = parser.Parse(`echo (echo1`)
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-	_, err = parser.Parse(`echo )echo1`)
-	if err == nil {
-		t.Fatal("Should be an error")
-	}
-}
-
-func TestEnv(t *testing.T) {
-	os.Setenv("FOO", "bar")
-
-	parser := NewParser()
-	parser.ParseEnv = true
-	args, err := parser.Parse("echo $FOO")
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected := []string{"echo", "bar"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-}
-
-func TestNoEnv(t *testing.T) {
-	parser := NewParser()
-	parser.ParseEnv = true
-	args, err := parser.Parse("echo $BAR")
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected := []string{"echo", ""}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-}
-
-func TestDupEnv(t *testing.T) {
-	os.Setenv("FOO", "bar")
-	os.Setenv("FOO_BAR", "baz")
-
-	parser := NewParser()
-	parser.ParseEnv = true
-	args, err := parser.Parse("echo $$FOO$")
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected := []string{"echo", "$bar$"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-
-	args, err = parser.Parse("echo $${FOO_BAR}$")
-	if err != nil {
-		t.Fatal(err)
-	}
-	expected = []string{"echo", "$baz$"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-}
-
-func TestHaveMore(t *testing.T) {
-	parser := NewParser()
-	parser.ParseEnv = true
-
-	line := "echo foo; seq 1 10"
-	args, err := parser.Parse(line)
-	if err != nil {
-		t.Fatalf(err.Error())
-	}
-	expected := []string{"echo", "foo"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-
-	if parser.Position == 0 {
-		t.Fatalf("Commands should be remaining")
-	}
-
-	line = string([]rune(line)[parser.Position+1:])
-	args, err = parser.Parse(line)
-	if err != nil {
-		t.Fatalf(err.Error())
-	}
-	expected = []string{"seq", "1", "10"}
-	if !reflect.DeepEqual(args, expected) {
-		t.Fatalf("Expected %#v, but %#v:", expected, args)
-	}
-
-	if parser.Position > 0 {
-		t.Fatalf("Commands should not be remaining")
-	}
-}

cmd/micro/shellwords/util_posix.go

@@ -1,22 +0,0 @@
-// +build !windows
-
-package shellwords
-
-import (
-	"errors"
-	"os"
-	"os/exec"
-	"strings"
-)
-
-func shellRun(line string) (string, error) {
-	shell := os.Getenv("SHELL")
-	b, err := exec.Command(shell, "-c", line).Output()
-	if err != nil {
-		if eerr, ok := err.(*exec.ExitError); ok {
-			b = eerr.Stderr
-		}
-		return "", errors.New(err.Error() + ":" + string(b))
-	}
-	return strings.TrimSpace(string(b)), nil
-}

cmd/micro/shellwords/util_windows.go

@@ -1,20 +0,0 @@
-package shellwords
-
-import (
-	"errors"
-	"os"
-	"os/exec"
-	"strings"
-)
-
-func shellRun(line string) (string, error) {
-	shell := os.Getenv("COMSPEC")
-	b, err := exec.Command(shell, "/c", line).Output()
-	if err != nil {
-		if eerr, ok := err.(*exec.ExitError); ok {
-			b = eerr.Stderr
-		}
-		return "", errors.New(err.Error() + ":" + string(b))
-	}
-	return strings.TrimSpace(string(b)), nil
-}

cmd/micro/split_tree.go

@@ -1,317 +0,0 @@
-package main
-
-// SplitType specifies whether a split is horizontal or vertical
-type SplitType bool
-
-const (
-	// VerticalSplit type
-	VerticalSplit = false
-	// HorizontalSplit type
-	HorizontalSplit = true
-)
-
-// A Node on the split tree
-type Node interface {
-	VSplit(buf *Buffer, splitIndex int)
-	HSplit(buf *Buffer, splitIndex int)
-	String() string
-}
-
-// A LeafNode is an actual split so it contains a view
-type LeafNode struct {
-	view *View
-
-	parent *SplitTree
-}
-
-// NewLeafNode returns a new leaf node containing the given view
-func NewLeafNode(v *View, parent *SplitTree) *LeafNode {
-	n := new(LeafNode)
-	n.view = v
-	n.view.splitNode = n
-	n.parent = parent
-	return n
-}
-
-// A SplitTree is a Node itself and it contains other nodes
-type SplitTree struct {
-	kind SplitType
-
-	parent   *SplitTree
-	children []Node
-
-	x int
-	y int
-
-	width      int
-	height     int
-	lockWidth  bool
-	lockHeight bool
-
-	tabNum int
-}
-
-// VSplit creates a vertical split
-func (l *LeafNode) VSplit(buf *Buffer, splitIndex int) {
-	if splitIndex < 0 {
-		splitIndex = 0
-	}
-
-	tab := tabs[l.parent.tabNum]
-	if l.parent.kind == VerticalSplit {
-		if splitIndex > len(l.parent.children) {
-			splitIndex = len(l.parent.children)
-		}
-
-		newView := NewView(buf)
-		newView.TabNum = l.parent.tabNum
-
-		l.parent.children = append(l.parent.children, nil)
-		copy(l.parent.children[splitIndex+1:], l.parent.children[splitIndex:])
-		l.parent.children[splitIndex] = NewLeafNode(newView, l.parent)
-
-		tab.views = append(tab.views, nil)
-		copy(tab.views[splitIndex+1:], tab.views[splitIndex:])
-		tab.views[splitIndex] = newView
-
-		tab.CurView = splitIndex
-	} else {
-		if splitIndex > 1 {
-			splitIndex = 1
-		}
-
-		s := new(SplitTree)
-		s.kind = VerticalSplit
-		s.parent = l.parent
-		s.tabNum = l.parent.tabNum
-		newView := NewView(buf)
-		newView.TabNum = l.parent.tabNum
-		if splitIndex == 1 {
-			s.children = []Node{l, NewLeafNode(newView, s)}
-		} else {
-			s.children = []Node{NewLeafNode(newView, s), l}
-		}
-		l.parent.children[search(l.parent.children, l)] = s
-		l.parent = s
-
-		tab.views = append(tab.views, nil)
-		copy(tab.views[splitIndex+1:], tab.views[splitIndex:])
-		tab.views[splitIndex] = newView
-
-		tab.CurView = splitIndex
-	}
-
-	tab.Resize()
-}
-
-// HSplit creates a horizontal split
-func (l *LeafNode) HSplit(buf *Buffer, splitIndex int) {
-	if splitIndex < 0 {
-		splitIndex = 0
-	}
-
-	tab := tabs[l.parent.tabNum]
-	if l.parent.kind == HorizontalSplit {
-		if splitIndex > len(l.parent.children) {
-			splitIndex = len(l.parent.children)
-		}
-
-		newView := NewView(buf)
-		newView.TabNum = l.parent.tabNum
-
-		l.parent.children = append(l.parent.children, nil)
-		copy(l.parent.children[splitIndex+1:], l.parent.children[splitIndex:])
-		l.parent.children[splitIndex] = NewLeafNode(newView, l.parent)
-
-		tab.views = append(tab.views, nil)
-		copy(tab.views[splitIndex+1:], tab.views[splitIndex:])
-		tab.views[splitIndex] = newView
-
-		tab.CurView = splitIndex
-	} else {
-		if splitIndex > 1 {
-			splitIndex = 1
-		}
-
-		s := new(SplitTree)
-		s.kind = HorizontalSplit
-		s.tabNum = l.parent.tabNum
-		s.parent = l.parent
-		newView := NewView(buf)
-		newView.TabNum = l.parent.tabNum
-		newView.Num = len(tab.views)
-		if splitIndex == 1 {
-			s.children = []Node{l, NewLeafNode(newView, s)}
-		} else {
-			s.children = []Node{NewLeafNode(newView, s), l}
-		}
-		l.parent.children[search(l.parent.children, l)] = s
-		l.parent = s
-
-		tab.views = append(tab.views, nil)
-		copy(tab.views[splitIndex+1:], tab.views[splitIndex:])
-		tab.views[splitIndex] = newView
-
-		tab.CurView = splitIndex
-	}
-
-	tab.Resize()
-}
-
-// Delete deletes a split
-func (l *LeafNode) Delete() {
-	i := search(l.parent.children, l)
-
-	copy(l.parent.children[i:], l.parent.children[i+1:])
-	l.parent.children[len(l.parent.children)-1] = nil
-	l.parent.children = l.parent.children[:len(l.parent.children)-1]
-
-	tab := tabs[l.parent.tabNum]
-	j := findView(tab.views, l.view)
-	copy(tab.views[j:], tab.views[j+1:])
-	tab.views[len(tab.views)-1] = nil // or the zero value of T
-	tab.views = tab.views[:len(tab.views)-1]
-
-	for i, v := range tab.views {
-		v.Num = i
-	}
-	if tab.CurView > 0 {
-		tab.CurView--
-	}
-}
-
-// Cleanup rearranges all the parents after a split has been deleted
-func (s *SplitTree) Cleanup() {
-	for i, node := range s.children {
-		if n, ok := node.(*SplitTree); ok {
-			if len(n.children) == 1 {
-				if child, ok := n.children[0].(*LeafNode); ok {
-					s.children[i] = child
-					child.parent = s
-					continue
-				}
-			}
-			n.Cleanup()
-		}
-	}
-}
-
-// ResizeSplits resizes all the splits correctly
-func (s *SplitTree) ResizeSplits() {
-	lockedWidth := 0
-	lockedHeight := 0
-	lockedChildren := 0
-	for _, node := range s.children {
-		if n, ok := node.(*LeafNode); ok {
-			if s.kind == VerticalSplit {
-				if n.view.LockWidth {
-					lockedWidth += n.view.Width
-					lockedChildren++
-				}
-			} else {
-				if n.view.LockHeight {
-					lockedHeight += n.view.Height
-					lockedChildren++
-				}
-			}
-		} else if n, ok := node.(*SplitTree); ok {
-			if s.kind == VerticalSplit {
-				if n.lockWidth {
-					lockedWidth += n.width
-					lockedChildren++
-				}
-			} else {
-				if n.lockHeight {
-					lockedHeight += n.height
-					lockedChildren++
-				}
-			}
-		}
-	}
-	x, y := 0, 0
-	for _, node := range s.children {
-		if n, ok := node.(*LeafNode); ok {
-			if s.kind == VerticalSplit {
-				if !n.view.LockWidth {
-					n.view.Width = (s.width - lockedWidth) / (len(s.children) - lockedChildren)
-				}
-				n.view.Height = s.height
-
-				n.view.x = s.x + x
-				n.view.y = s.y
-				x += n.view.Width
-			} else {
-				if !n.view.LockHeight {
-					n.view.Height = (s.height - lockedHeight) / (len(s.children) - lockedChildren)
-				}
-				n.view.Width = s.width
-
-				n.view.y = s.y + y
-				n.view.x = s.x
-				y += n.view.Height
-			}
-			if n.view.Buf.Settings["statusline"].(bool) {
-				n.view.Height--
-			}
-
-			n.view.ToggleTabbar()
-		} else if n, ok := node.(*SplitTree); ok {
-			if s.kind == VerticalSplit {
-				if !n.lockWidth {
-					n.width = (s.width - lockedWidth) / (len(s.children) - lockedChildren)
-				}
-				n.height = s.height
-
-				n.x = s.x + x
-				n.y = s.y
-				x += n.width
-			} else {
-				if !n.lockHeight {
-					n.height = (s.height - lockedHeight) / (len(s.children) - lockedChildren)
-				}
-				n.width = s.width
-
-				n.y = s.y + y
-				n.x = s.x
-				y += n.height
-			}
-			n.ResizeSplits()
-		}
-	}
-}
-
-func (l *LeafNode) String() string {
-	return l.view.Buf.GetName()
-}
-
-func search(haystack []Node, needle Node) int {
-	for i, x := range haystack {
-		if x == needle {
-			return i
-		}
-	}
-	return 0
-}
-
-func findView(haystack []*View, needle *View) int {
-	for i, x := range haystack {
-		if x == needle {
-			return i
-		}
-	}
-	return 0
-}
-
-// VSplit is here just to make SplitTree fit the Node interface
-func (s *SplitTree) VSplit(buf *Buffer, splitIndex int) {}
-
-// HSplit is here just to make SplitTree fit the Node interface
-func (s *SplitTree) HSplit(buf *Buffer, splitIndex int) {}
-
-func (s *SplitTree) String() string {
-	str := "["
-	for _, child := range s.children {
-		str += child.String() + ", "
-	}
-	return str + "]"
-}

cmd/micro/statusline.go

@@ -1,96 +0,0 @@
-package main
-
-import (
-	"path"
-	"strconv"
-)
-
-// Statusline represents the information line at the bottom
-// of each view
-// It gives information such as filename, whether the file has been
-// modified, filetype, cursor location
-type Statusline struct {
-	view *View
-}
-
-// Display draws the statusline to the screen
-func (sline *Statusline) Display() {
-	if messenger.hasPrompt && !GetGlobalOption("infobar").(bool) {
-		return
-	}
-
-	// We'll draw the line at the lowest line in the view
-	y := sline.view.Height + sline.view.y
-
-	file := sline.view.Buf.GetName()
-	if sline.view.Buf.Settings["basename"].(bool) {
-		file = path.Base(file)
-	}
-
-	// If the buffer is dirty (has been modified) write a little '+'
-	if sline.view.Buf.Modified() {
-		file += " +"
-	}
-
-	// Add one to cursor.x and cursor.y because (0,0) is the top left,
-	// but users will be used to (1,1) (first line,first column)
-	// We use GetVisualX() here because otherwise we get the column number in runes
-	// so a '\t' is only 1, when it should be tabSize
-	columnNum := strconv.Itoa(sline.view.Cursor.GetVisualX() + 1)
-	lineNum := strconv.Itoa(sline.view.Cursor.Y + 1)
-
-	file += " (" + lineNum + "," + columnNum + ")"
-
-	// Add the filetype
-	file += " " + sline.view.Buf.FileType()
-
-	file += " " + sline.view.Buf.Settings["fileformat"].(string)
-
-	rightText := ""
-	if len(kmenuBinding) > 0 {
-		if globalSettings["keymenu"].(bool) {
-			rightText += kmenuBinding + ": hide bindings"
-		} else {
-			rightText += kmenuBinding + ": show bindings"
-		}
-	}
-	if len(helpBinding) > 0 {
-		if len(kmenuBinding) > 0 {
-			rightText += ", "
-		}
-		if sline.view.Type == vtHelp {
-			rightText += helpBinding + ": close help"
-		} else {
-			rightText += helpBinding + ": open help"
-		}
-	}
-	rightText += " "
-
-	statusLineStyle := defStyle.Reverse(true)
-	if style, ok := colorscheme["statusline"]; ok {
-		statusLineStyle = style
-	}
-
-	// Maybe there is a unicode filename?
-	fileRunes := []rune(file)
-
-	if sline.view.Type == vtTerm {
-		fileRunes = []rune(sline.view.term.title)
-		rightText = ""
-	}
-
-	viewX := sline.view.x
-	if viewX != 0 {
-		screen.SetContent(viewX, y, ' ', nil, statusLineStyle)
-		viewX++
-	}
-	for x := 0; x < sline.view.Width; x++ {
-		if x < len(fileRunes) {
-			screen.SetContent(viewX+x, y, fileRunes[x], nil, statusLineStyle)
-		} else if x >= sline.view.Width-len(rightText) && x < len(rightText)+sline.view.Width-len(rightText) {
-			screen.SetContent(viewX+x, y, []rune(rightText)[x-sline.view.Width+len(rightText)], nil, statusLineStyle)
-		} else {
-			screen.SetContent(viewX+x, y, ' ', nil, statusLineStyle)
-		}
-	}
-}

cmd/micro/tab.go

@@ -1,279 +0,0 @@
-package main
-
-import (
-	"sort"
-
-	"github.com/zyedidia/tcell"
-)
-
-var tabBarOffset int
-
-// A Tab holds an array of views and a splitTree to determine how the
-// views should be arranged
-type Tab struct {
-	// This contains all the views in this tab
-	// There is generally only one view per tab, but you can have
-	// multiple views with splits
-	views []*View
-	// This is the current view for this tab
-	CurView int
-
-	tree *SplitTree
-}
-
-// NewTabFromView creates a new tab and puts the given view in the tab
-func NewTabFromView(v *View) *Tab {
-	t := new(Tab)
-	t.views = append(t.views, v)
-	t.views[0].Num = 0
-
-	t.tree = new(SplitTree)
-	t.tree.kind = VerticalSplit
-	t.tree.children = []Node{NewLeafNode(t.views[0], t.tree)}
-
-	w, h := screen.Size()
-	t.tree.width = w
-	t.tree.height = h
-
-	if globalSettings["infobar"].(bool) {
-		t.tree.height--
-	}
-	if globalSettings["keymenu"].(bool) {
-		t.tree.height -= 2
-	}
-
-	t.Resize()
-
-	return t
-}
-
-// SetNum sets all this tab's views to have the correct tab number
-func (t *Tab) SetNum(num int) {
-	t.tree.tabNum = num
-	for _, v := range t.views {
-		v.TabNum = num
-	}
-}
-
-// Cleanup cleans up the tree (for example if views have closed)
-func (t *Tab) Cleanup() {
-	t.tree.Cleanup()
-}
-
-// Resize handles a resize event from the terminal and resizes
-// all child views correctly
-func (t *Tab) Resize() {
-	w, h := screen.Size()
-	t.tree.width = w
-	t.tree.height = h
-
-	if globalSettings["infobar"].(bool) {
-		t.tree.height--
-	}
-	if globalSettings["keymenu"].(bool) {
-		t.tree.height -= 2
-	}
-
-	t.tree.ResizeSplits()
-
-	for i, v := range t.views {
-		v.Num = i
-		if v.Type == vtTerm {
-			v.term.Resize(v.Width, v.Height)
-		}
-	}
-}
-
-// CurView returns the current view
-func CurView() *View {
-	curTab := tabs[curTab]
-	return curTab.views[curTab.CurView]
-}
-
-// TabbarString returns the string that should be displayed in the tabbar
-// It also returns a map containing which indicies correspond to which tab number
-// This is useful when we know that the mouse click has occurred at an x location
-// but need to know which tab that corresponds to to accurately change the tab
-func TabbarString() (string, map[int]int) {
-	str := ""
-	indicies := make(map[int]int)
-	for i, t := range tabs {
-		if i == curTab {
-			str += "["
-		} else {
-			str += " "
-		}
-		buf := t.views[t.CurView].Buf
-		str += buf.GetName()
-		if buf.Modified() {
-			str += " +"
-		}
-		if i == curTab {
-			str += "]"
-		} else {
-			str += " "
-		}
-		indicies[Count(str)-1] = i + 1
-		str += " "
-	}
-	return str, indicies
-}
-
-// TabbarHandleMouseEvent checks the given mouse event if it is clicking on the tabbar
-// If it is it changes the current tab accordingly
-// This function returns true if the tab is changed
-func TabbarHandleMouseEvent(event tcell.Event) bool {
-	// There is no tabbar displayed if there are less than 2 tabs
-	if len(tabs) <= 1 {
-		return false
-	}
-
-	switch e := event.(type) {
-	case *tcell.EventMouse:
-		button := e.Buttons()
-		// Must be a left click
-		if button == tcell.Button1 {
-			x, y := e.Position()
-			if y != 0 {
-				return false
-			}
-			str, indicies := TabbarString()
-			if x+tabBarOffset >= len(str) {
-				return false
-			}
-			var tabnum int
-			var keys []int
-			for k := range indicies {
-				keys = append(keys, k)
-			}
-			sort.Ints(keys)
-			for _, k := range keys {
-				if x+tabBarOffset <= k {
-					tabnum = indicies[k] - 1
-					break
-				}
-			}
-			curTab = tabnum
-			return true
-		}
-	}
-
-	return false
-}
-
-// DisplayTabs displays the tabbar at the top of the editor if there are multiple tabs
-func DisplayTabs() {
-	if len(tabs) <= 1 {
-		return
-	}
-
-	str, indicies := TabbarString()
-
-	tabBarStyle := defStyle.Reverse(true)
-	if style, ok := colorscheme["tabbar"]; ok {
-		tabBarStyle = style
-	}
-
-	// Maybe there is a unicode filename?
-	fileRunes := []rune(str)
-	w, _ := screen.Size()
-	tooWide := (w < len(fileRunes))
-
-	// if the entire tab-bar is longer than the screen is wide,
-	// then it should be truncated appropriately to keep the
-	// active tab visible on the UI.
-	if tooWide == true {
-		// first we have to work out where the selected tab is
-		// out of the total length of the tab bar. this is done
-		// by extracting the hit-areas from the indicies map
-		// that was constructed by `TabbarString()`
-		var keys []int
-		for offset := range indicies {
-			keys = append(keys, offset)
-		}
-		// sort them to be in ascending order so that values will
-		// correctly reflect the displayed ordering of the tabs
-		sort.Ints(keys)
-		// record the offset of each tab and the previous tab so
-		// we can find the position of the tab's hit-box.
-		previousTabOffset := 0
-		currentTabOffset := 0
-		for _, k := range keys {
-			tabIndex := indicies[k] - 1
-			if tabIndex == curTab {
-				currentTabOffset = k
-				break
-			}
-			// this is +2 because there are two padding spaces that aren't accounted
-			// for in the display. please note that this is for cosmetic purposes only.
-			previousTabOffset = k + 2
-		}
-		// get the width of the hitbox of the active tab, from there calculate the offsets
-		// to the left and right of it to approximately center it on the tab bar display.
-		centeringOffset := (w - (currentTabOffset - previousTabOffset))
-		leftBuffer := previousTabOffset - (centeringOffset / 2)
-		rightBuffer := currentTabOffset + (centeringOffset / 2)
-
-		// check to make sure we haven't overshot the bounds of the string,
-		// if we have, then take that remainder and put it on the left side
-		overshotRight := rightBuffer - len(fileRunes)
-		if overshotRight > 0 {
-			leftBuffer = leftBuffer + overshotRight
-		}
-
-		overshotLeft := leftBuffer - 0
-		if overshotLeft < 0 {
-			leftBuffer = 0
-			rightBuffer = leftBuffer + (w - 1)
-		} else {
-			rightBuffer = leftBuffer + (w - 2)
-		}
-
-		if rightBuffer > len(fileRunes)-1 {
-			rightBuffer = len(fileRunes) - 1
-		}
-
-		// construct a new buffer of text to put the
-		// newly formatted tab bar text into.
-		var displayText []rune
-
-		// if the left-side of the tab bar isn't at the start
-		// of the constructed tab bar text, then show that are
-		// more tabs to the left by displaying a "+"
-		if leftBuffer != 0 {
-			displayText = append(displayText, '+')
-		}
-		// copy the runes in from the original tab bar text string
-		// into the new display buffer
-		for x := leftBuffer; x < rightBuffer; x++ {
-			displayText = append(displayText, fileRunes[x])
-		}
-		// if there is more text to the right of the right-most
-		// column in the tab bar text, then indicate there are more
-		// tabs to the right by displaying a "+"
-		if rightBuffer < len(fileRunes)-1 {
-			displayText = append(displayText, '+')
-		}
-
-		// now store the offset from zero of the left-most text
-		// that is being displayed. This is to ensure that when
-		// clicking on the tab bar, the correct tab gets selected.
-		tabBarOffset = leftBuffer
-
-		// use the constructed buffer as the display buffer to print
-		// onscreen.
-		fileRunes = displayText
-	} else {
-		tabBarOffset = 0
-	}
-
-	// iterate over the width of the terminal display and for each column,
-	// write a character into the tab display area with the appropriate style.
-	for x := 0; x < w; x++ {
-		if x < len(fileRunes) {
-			screen.SetContent(x, 0, fileRunes[x], nil, tabBarStyle)
-		} else {
-			screen.SetContent(x, 0, ' ', nil, tabBarStyle)
-		}
-	}
-}

cmd/micro/terminal.go

@@ -1,228 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"os/exec"
-	"strconv"
-	"strings"
-
-	"github.com/zyedidia/clipboard"
-	"github.com/zyedidia/tcell"
-	"github.com/zyedidia/terminal"
-)
-
-const (
-	VTIdle    = iota // Waiting for a new command
-	VTRunning        // Currently running a command
-	VTDone           // Finished running a command
-)
-
-// A Terminal holds information for the terminal emulator
-type Terminal struct {
-	state     terminal.State
-	view      *View
-	vtOld     ViewType
-	term      *terminal.VT
-	title     string
-	status    int
-	selection [2]Loc
-	wait      bool
-	getOutput bool
-	output    *bytes.Buffer
-	callback  string
-}
-
-// HasSelection returns whether this terminal has a valid selection
-func (t *Terminal) HasSelection() bool {
-	return t.selection[0] != t.selection[1]
-}
-
-// GetSelection returns the selected text
-func (t *Terminal) GetSelection(width int) string {
-	start := t.selection[0]
-	end := t.selection[1]
-	if start.GreaterThan(end) {
-		start, end = end, start
-	}
-	var ret string
-	var l Loc
-	for y := start.Y; y <= end.Y; y++ {
-		for x := 0; x < width; x++ {
-			l.X, l.Y = x, y
-			if l.GreaterEqual(start) && l.LessThan(end) {
-				c, _, _ := t.state.Cell(x, y)
-				ret += string(c)
-			}
-		}
-	}
-	return ret
-}
-
-// Start begins a new command in this terminal with a given view
-func (t *Terminal) Start(execCmd []string, view *View, getOutput bool) error {
-	if len(execCmd) <= 0 {
-		return nil
-	}
-
-	cmd := exec.Command(execCmd[0], execCmd[1:]...)
-	t.output = nil
-	if getOutput {
-		t.output = bytes.NewBuffer([]byte{})
-	}
-	term, _, err := terminal.Start(&t.state, cmd, t.output)
-	if err != nil {
-		return err
-	}
-	t.term = term
-	t.view = view
-	t.getOutput = getOutput
-	t.vtOld = view.Type
-	t.status = VTRunning
-	t.title = execCmd[0] + ":" + strconv.Itoa(cmd.Process.Pid)
-
-	go func() {
-		for {
-			err := term.Parse()
-			if err != nil {
-				fmt.Fprintln(os.Stderr, "[Press enter to close]")
-				break
-			}
-			updateterm <- true
-		}
-		closeterm <- view.Num
-	}()
-
-	return nil
-}
-
-// Resize informs the terminal of a resize event
-func (t *Terminal) Resize(width, height int) {
-	t.term.Resize(width, height)
-}
-
-// HandleEvent handles a tcell event by forwarding it to the terminal emulator
-// If the event is a mouse event and the program running in the emulator
-// does not have mouse support, the emulator will support selections and
-// copy-paste
-func (t *Terminal) HandleEvent(event tcell.Event) {
-	if e, ok := event.(*tcell.EventKey); ok {
-		if t.status == VTDone {
-			switch e.Key() {
-			case tcell.KeyEscape, tcell.KeyCtrlQ, tcell.KeyEnter:
-				t.Close()
-				t.view.Type = vtDefault
-			default:
-			}
-		}
-		if e.Key() == tcell.KeyCtrlC && t.HasSelection() {
-			clipboard.WriteAll(t.GetSelection(t.view.Width), "clipboard")
-			messenger.Message("Copied selection to clipboard")
-		} else if t.status != VTDone {
-			t.WriteString(event.EscSeq())
-		}
-	} else if e, ok := event.(*tcell.EventMouse); !ok || t.state.Mode(terminal.ModeMouseMask) {
-		t.WriteString(event.EscSeq())
-	} else {
-		x, y := e.Position()
-		x -= t.view.x
-		y += t.view.y
-
-		if e.Buttons() == tcell.Button1 {
-			if !t.view.mouseReleased {
-				// drag
-				t.selection[1].X = x
-				t.selection[1].Y = y
-			} else {
-				t.selection[0].X = x
-				t.selection[0].Y = y
-				t.selection[1].X = x
-				t.selection[1].Y = y
-			}
-
-			t.view.mouseReleased = false
-		} else if e.Buttons() == tcell.ButtonNone {
-			if !t.view.mouseReleased {
-				t.selection[1].X = x
-				t.selection[1].Y = y
-			}
-			t.view.mouseReleased = true
-		}
-	}
-}
-
-// Stop stops execution of the terminal and sets the status
-// to VTDone
-func (t *Terminal) Stop() {
-	t.term.File().Close()
-	t.term.Close()
-	if t.wait {
-		t.status = VTDone
-	} else {
-		t.Close()
-		t.view.Type = t.vtOld
-	}
-}
-
-// Close sets the status to VTIdle indicating that the terminal
-// is ready for a new command to execute
-func (t *Terminal) Close() {
-	t.status = VTIdle
-	// call the lua function that the user has given as a callback
-	if t.getOutput {
-		_, err := Call(t.callback, t.output.String())
-		if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
-			TermMessage(err)
-		}
-	}
-}
-
-// WriteString writes a given string to this terminal's pty
-func (t *Terminal) WriteString(str string) {
-	t.term.File().WriteString(str)
-}
-
-// Display displays this terminal in a view
-func (t *Terminal) Display() {
-	divider := 0
-	if t.view.x != 0 {
-		divider = 1
-		dividerStyle := defStyle
-		if style, ok := colorscheme["divider"]; ok {
-			dividerStyle = style
-		}
-		for i := 0; i < t.view.Height; i++ {
-			screen.SetContent(t.view.x, t.view.y+i, '|', nil, dividerStyle.Reverse(true))
-		}
-	}
-	t.state.Lock()
-	defer t.state.Unlock()
-
-	var l Loc
-	for y := 0; y < t.view.Height; y++ {
-		for x := 0; x < t.view.Width; x++ {
-			l.X, l.Y = x, y
-			c, f, b := t.state.Cell(x, y)
-
-			fg, bg := int(f), int(b)
-			if f == terminal.DefaultFG {
-				fg = int(tcell.ColorDefault)
-			}
-			if b == terminal.DefaultBG {
-				bg = int(tcell.ColorDefault)
-			}
-			st := tcell.StyleDefault.Foreground(GetColor256(int(fg))).Background(GetColor256(int(bg)))
-
-			if l.LessThan(t.selection[1]) && l.GreaterEqual(t.selection[0]) || l.LessThan(t.selection[0]) && l.GreaterEqual(t.selection[1]) {
-				st = st.Reverse(true)
-			}
-
-			screen.SetContent(t.view.x+x+divider, t.view.y+y, c, nil, st)
-		}
-	}
-	if t.state.CursorVisible() && tabs[curTab].CurView == t.view.Num {
-		curx, cury := t.state.Cursor()
-		screen.ShowCursor(curx+t.view.x+divider, cury+t.view.y)
-	}
-}

cmd/micro/util.go

@@ -1,291 +0,0 @@
-package main
-
-import (
-	"os"
-	"path/filepath"
-	"reflect"
-	"runtime"
-	"strconv"
-	"strings"
-	"time"
-	"unicode/utf8"
-
-	"github.com/mattn/go-runewidth"
-	homedir "github.com/mitchellh/go-homedir"
-)
-
-// Util.go is a collection of utility functions that are used throughout
-// the program
-
-// Count returns the length of a string in runes
-// This is exactly equivalent to utf8.RuneCountInString(), just less characters
-func Count(s string) int {
-	return utf8.RuneCountInString(s)
-}
-
-// NumOccurrences counts the number of occurrences of a byte in a string
-func NumOccurrences(s string, c byte) int {
-	var n int
-	for i := 0; i < len(s); i++ {
-		if s[i] == c {
-			n++
-		}
-	}
-	return n
-}
-
-// Spaces returns a string with n spaces
-func Spaces(n int) string {
-	return strings.Repeat(" ", n)
-}
-
-// Min takes the min of two ints
-func Min(a, b int) int {
-	if a > b {
-		return b
-	}
-	return a
-}
-
-// Max takes the max of two ints
-func Max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
-
-// FSize gets the size of a file
-func FSize(f *os.File) int64 {
-	fi, _ := f.Stat()
-	// get the size
-	return fi.Size()
-}
-
-// IsWordChar returns whether or not the string is a 'word character'
-// If it is a unicode character, then it does not match
-// Word characters are defined as [A-Za-z0-9_]
-func IsWordChar(str string) bool {
-	if len(str) > 1 {
-		// Unicode
-		return true
-	}
-	c := str[0]
-	return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c == '_')
-}
-
-// IsWhitespace returns true if the given rune is a space, tab, or newline
-func IsWhitespace(c rune) bool {
-	return c == ' ' || c == '\t' || c == '\n'
-}
-
-// IsStrWhitespace returns true if the given string is all whitespace
-func IsStrWhitespace(str string) bool {
-	for _, c := range str {
-		if !IsWhitespace(c) {
-			return false
-		}
-	}
-	return true
-}
-
-// Contains returns whether or not a string array contains a given string
-func Contains(list []string, a string) bool {
-	for _, b := range list {
-		if b == a {
-			return true
-		}
-	}
-	return false
-}
-
-// Insert makes a simple insert into a string at the given position
-func Insert(str string, pos int, value string) string {
-	return string([]rune(str)[:pos]) + value + string([]rune(str)[pos:])
-}
-
-// MakeRelative will attempt to make a relative path between path and base
-func MakeRelative(path, base string) (string, error) {
-	if len(path) > 0 {
-		rel, err := filepath.Rel(base, path)
-		if err != nil {
-			return path, err
-		}
-		return rel, nil
-	}
-	return path, nil
-}
-
-// GetLeadingWhitespace returns the leading whitespace of the given string
-func GetLeadingWhitespace(str string) string {
-	ws := ""
-	for _, c := range str {
-		if c == ' ' || c == '\t' {
-			ws += string(c)
-		} else {
-			break
-		}
-	}
-	return ws
-}
-
-// IsSpaces checks if a given string is only spaces
-func IsSpaces(str string) bool {
-	for _, c := range str {
-		if c != ' ' {
-			return false
-		}
-	}
-
-	return true
-}
-
-// IsSpacesOrTabs checks if a given string contains only spaces and tabs
-func IsSpacesOrTabs(str string) bool {
-	for _, c := range str {
-		if c != ' ' && c != '\t' {
-			return false
-		}
-	}
-
-	return true
-}
-
-// ParseBool is almost exactly like strconv.ParseBool, except it also accepts 'on' and 'off'
-// as 'true' and 'false' respectively
-func ParseBool(str string) (bool, error) {
-	if str == "on" {
-		return true, nil
-	}
-	if str == "off" {
-		return false, nil
-	}
-	return strconv.ParseBool(str)
-}
-
-// EscapePath replaces every path separator in a given path with a %
-func EscapePath(path string) string {
-	path = filepath.ToSlash(path)
-	return strings.Replace(path, "/", "%", -1)
-}
-
-// GetModTime returns the last modification time for a given file
-// It also returns a boolean if there was a problem accessing the file
-func GetModTime(path string) (time.Time, bool) {
-	info, err := os.Stat(path)
-	if err != nil {
-		return time.Now(), false
-	}
-	return info.ModTime(), true
-}
-
-// StringWidth returns the width of a string where tabs count as `tabsize` width
-func StringWidth(str string, tabsize int) int {
-	sw := runewidth.StringWidth(str)
-	lineIdx := 0
-	for _, ch := range str {
-		switch ch {
-		case '\t':
-			ts := tabsize - (lineIdx % tabsize)
-			sw += ts
-			lineIdx += ts
-		case '\n':
-			lineIdx = 0
-		default:
-			lineIdx++
-		}
-	}
-	return sw
-}
-
-// WidthOfLargeRunes searches all the runes in a string and counts up all the widths of runes
-// that have a width larger than 1 (this also counts tabs as `tabsize` width)
-func WidthOfLargeRunes(str string, tabsize int) int {
-	count := 0
-	lineIdx := 0
-	for _, ch := range str {
-		var w int
-		if ch == '\t' {
-			w = tabsize - (lineIdx % tabsize)
-		} else {
-			w = runewidth.RuneWidth(ch)
-		}
-		if w > 1 {
-			count += (w - 1)
-		}
-		if ch == '\n' {
-			lineIdx = 0
-		} else {
-			lineIdx += w
-		}
-	}
-	return count
-}
-
-// RunePos returns the rune index of a given byte index
-// This could cause problems if the byte index is between code points
-func runePos(p int, str string) int {
-	return utf8.RuneCountInString(str[:p])
-}
-
-func lcs(a, b string) string {
-	arunes := []rune(a)
-	brunes := []rune(b)
-
-	lcs := ""
-	for i, r := range arunes {
-		if i >= len(brunes) {
-			break
-		}
-		if r == brunes[i] {
-			lcs += string(r)
-		} else {
-			break
-		}
-	}
-	return lcs
-}
-
-// CommonSubstring gets a common substring among the inputs
-func CommonSubstring(arr ...string) string {
-	commonStr := arr[0]
-
-	for _, str := range arr[1:] {
-		commonStr = lcs(commonStr, str)
-	}
-
-	return commonStr
-}
-
-// Abs is a simple absolute value function for ints
-func Abs(n int) int {
-	if n < 0 {
-		return -n
-	}
-	return n
-}
-
-// FuncName returns the full name of a given function object
-func FuncName(i interface{}) string {
-	return runtime.FuncForPC(reflect.ValueOf(i).Pointer()).Name()
-}
-
-// ShortFuncName returns the name only of a given function object
-func ShortFuncName(i interface{}) string {
-	return strings.TrimPrefix(runtime.FuncForPC(reflect.ValueOf(i).Pointer()).Name(), "main.(*View).")
-}
-
-// ReplaceHome takes a path as input and replaces ~ at the start of the path with the user's
-// home directory. Does nothing if the path does not start with '~'.
-func ReplaceHome(path string) string {
-	if !strings.HasPrefix(path, "~") {
-		return path
-	}
-
-	home, err := homedir.Dir()
-	if err != nil {
-		messenger.Error("Could not find home directory: ", err)
-		return path
-	}
-	return strings.Replace(path, "~", home, 1)
-}

cmd/micro/util_test.go

@@ -1,105 +0,0 @@
-package main
-
-import (
-	"testing"
-)
-
-func TestNumOccurences(t *testing.T) {
-	var tests = []struct {
-		inputStr  string
-		inputChar byte
-		want      int
-	}{
-		{"aaaa", 'a', 4},
-		{"\trfd\ta", '\t', 2},
-		{"∆ƒ\tø ® \t\t", '\t', 3},
-	}
-	for _, test := range tests {
-		if got := NumOccurrences(test.inputStr, test.inputChar); got != test.want {
-			t.Errorf("NumOccurences(%s, %c) = %d", test.inputStr, test.inputChar, got)
-		}
-	}
-}
-
-func TestSpaces(t *testing.T) {
-	var tests = []struct {
-		input int
-		want  string
-	}{
-		{4, "    "},
-		{0, ""},
-	}
-	for _, test := range tests {
-		if got := Spaces(test.input); got != test.want {
-			t.Errorf("Spaces(%d) = \"%s\"", test.input, got)
-		}
-	}
-}
-
-func TestIsWordChar(t *testing.T) {
-	if IsWordChar("t") == false {
-		t.Errorf("IsWordChar(t) = false")
-	}
-	if IsWordChar("T") == false {
-		t.Errorf("IsWordChar(T) = false")
-	}
-	if IsWordChar("5") == false {
-		t.Errorf("IsWordChar(5) = false")
-	}
-	if IsWordChar("_") == false {
-		t.Errorf("IsWordChar(_) = false")
-	}
-	if IsWordChar("ß") == false {
-		t.Errorf("IsWordChar(ß) = false")
-	}
-	if IsWordChar("~") == true {
-		t.Errorf("IsWordChar(~) = true")
-	}
-	if IsWordChar(" ") == true {
-		t.Errorf("IsWordChar( ) = true")
-	}
-	if IsWordChar(")") == true {
-		t.Errorf("IsWordChar()) = true")
-	}
-	if IsWordChar("\n") == true {
-		t.Errorf("IsWordChar(\n)) = true")
-	}
-}
-
-func TestStringWidth(t *testing.T) {
-	tabsize := 4
-	if w := StringWidth("1\t2", tabsize); w != 5 {
-		t.Error("StringWidth 1 Failed. Got", w)
-	}
-	if w := StringWidth("\t", tabsize); w != 4 {
-		t.Error("StringWidth 2 Failed. Got", w)
-	}
-	if w := StringWidth("1\t", tabsize); w != 4 {
-		t.Error("StringWidth 3 Failed. Got", w)
-	}
-	if w := StringWidth("\t\t", tabsize); w != 8 {
-		t.Error("StringWidth 4 Failed. Got", w)
-	}
-	if w := StringWidth("12\t2\t", tabsize); w != 8 {
-		t.Error("StringWidth 5 Failed. Got", w)
-	}
-}
-
-func TestWidthOfLargeRunes(t *testing.T) {
-	tabsize := 4
-	if w := WidthOfLargeRunes("1\t2", tabsize); w != 2 {
-		t.Error("WidthOfLargeRunes 1 Failed. Got", w)
-	}
-	if w := WidthOfLargeRunes("\t", tabsize); w != 3 {
-		t.Error("WidthOfLargeRunes 2 Failed. Got", w)
-	}
-	if w := WidthOfLargeRunes("1\t", tabsize); w != 2 {
-		t.Error("WidthOfLargeRunes 3 Failed. Got", w)
-	}
-	if w := WidthOfLargeRunes("\t\t", tabsize); w != 6 {
-		t.Error("WidthOfLargeRunes 4 Failed. Got", w)
-	}
-	if w := WidthOfLargeRunes("12\t2\t", tabsize); w != 3 {
-		t.Error("WidthOfLargeRunes 5 Failed. Got", w)
-	}
-}

go.mod

@@ -0,0 +1,26 @@
+module github.com/zyedidia/micro
+
+require (
+	github.com/blang/semver v3.5.1+incompatible
+	github.com/dustin/go-humanize v1.0.0
+	github.com/go-errors/errors v1.0.1
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
+	github.com/mattn/go-isatty v0.0.11
+	github.com/mattn/go-runewidth v0.0.7
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/sergi/go-diff v1.1.0
+	github.com/stretchr/testify v1.4.0
+	github.com/yuin/gopher-lua v0.0.0-20191220021717-ab39c6098bdb
+	github.com/zyedidia/clipboard v0.0.0-20190823154308-241f98e9b197
+	github.com/zyedidia/glob v0.0.0-20170209203856-dd4023a66dc3
+	github.com/zyedidia/highlight v0.0.0-20170330143449-201131ce5cf5
+	github.com/zyedidia/json5 v0.0.0-20200102012142-2da050b1a98d
+	github.com/zyedidia/pty v2.0.0+incompatible // indirect
+	github.com/zyedidia/tcell v1.4.2
+	github.com/zyedidia/terminal v0.0.0-20180726154117-533c623e2415
+	golang.org/x/text v0.3.2
+	gopkg.in/yaml.v2 v2.2.7
+	layeh.com/gopher-luar v1.0.7
+)
+
+go 1.11

go.sum

@@ -0,0 +1,73 @@
+github.com/blang/semver v3.5.1+incompatible h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=
+github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
+github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
+github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
+github.com/go-errors/errors v1.0.1 h1:LUHzmkK3GUKUrL/1gfBUxAHzcev3apQlezX/+O7ma6w=
+github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
+github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 h1:Z9n2FFNUXsshfwJMBgNA0RU6/i7WVaAegv3PtuIHPMs=
+github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
+github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-isatty v0.0.11 h1:FxPOTFNqGkuDUGi3H/qkUbQO4ZiBa2brKq5r0l8TGeM=
+github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
+github.com/mattn/go-runewidth v0.0.7 h1:Ei8KR0497xHyKJPAv59M1dkC+rOZCMBJ+t3fZ+twI54=
+github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
+github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/yuin/gopher-lua v0.0.0-20190206043414-8bfc7677f583/go.mod h1:gqRgreBUhTSL0GeU64rtZ3Uq3wtjOa/TB2YfrtkCbVQ=
+github.com/yuin/gopher-lua v0.0.0-20191220021717-ab39c6098bdb h1:ZkM6LRnq40pR1Ox0hTHlnpkcOTuFIDQpZ1IN8rKKhX0=
+github.com/yuin/gopher-lua v0.0.0-20191220021717-ab39c6098bdb/go.mod h1:gqRgreBUhTSL0GeU64rtZ3Uq3wtjOa/TB2YfrtkCbVQ=
+github.com/zyedidia/clipboard v0.0.0-20190823154308-241f98e9b197 h1:gYTNnAW6azuB3BbA6QYWO/H4F2ABSOjjw3Z03tlXd2c=
+github.com/zyedidia/clipboard v0.0.0-20190823154308-241f98e9b197/go.mod h1:WDk3p8GiZV9+xFWlSo8qreeoLhW6Ik692rqXk+cNeRY=
+github.com/zyedidia/glob v0.0.0-20170209203856-dd4023a66dc3 h1:oMHjjTLfGXVuyOQBYj5/td9WC0mw4g1xDBPovIqmHew=
+github.com/zyedidia/glob v0.0.0-20170209203856-dd4023a66dc3/go.mod h1:YKbIYP//Eln8eDgAJGI3IDvR3s4Tv9Z9TGIOumiyQ5c=
+github.com/zyedidia/highlight v0.0.0-20170330143449-201131ce5cf5 h1:Zs6mpwXvlqpF9zHl5XaN0p5V4J9XvP+WBuiuXyIgqvc=
+github.com/zyedidia/highlight v0.0.0-20170330143449-201131ce5cf5/go.mod h1:c1r+Ob9tUTPB0FKWO1+x+Hsc/zNa45WdGq7Y38Ybip0=
+github.com/zyedidia/json5 v0.0.0-20200102012142-2da050b1a98d h1:zmDMkh22zXOB7gz8jFaI4GpI7llsPgzm38/jG0UgxjE=
+github.com/zyedidia/json5 v0.0.0-20200102012142-2da050b1a98d/go.mod h1:NDJSTTYWivnza6zkRapeX2/LwhKPEMQ7bJxqgDVT78I=
+github.com/zyedidia/poller v1.0.1 h1:Tt9S3AxAjXwWGNiC2TUdRJkQDZSzCBNVQ4xXiQ7440s=
+github.com/zyedidia/poller v1.0.1/go.mod h1:vZXJOHGDcuK08GXhF6IAY0ZFd2WcgOR5DOTp84Uk5eE=
+github.com/zyedidia/pty v2.0.0+incompatible h1:Ou5vXL6tvjst+RV8sUFISbuKDnUJPhnpygApMFGweqw=
+github.com/zyedidia/pty v2.0.0+incompatible/go.mod h1:4y9l9yJZNxRa7GB/fB+mmDmGkG3CqmzLf4vUxGGotEA=
+github.com/zyedidia/tcell v1.4.2 h1:JWMDs6O1saINPIR5M3kNqlWJwkfnBZeZDZszEJi3BW8=
+github.com/zyedidia/tcell v1.4.2/go.mod h1:HhlbMSCcGX15rFDB+Q1Lk3pKEOocsCUAQC3zhZ9sadA=
+github.com/zyedidia/terminal v0.0.0-20180726154117-533c623e2415 h1:752dTQ5OatJ9M5ULK2+9lor+nzyZz+LYDo3WGngg3Rc=
+github.com/zyedidia/terminal v0.0.0-20180726154117-533c623e2415/go.mod h1:8leT8G0Cm8NoJHdrrKHyR9MirWoF4YW7pZh06B6H+1E=
+golang.org/x/sys v0.0.0-20190204203706-41f3e6584952/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+layeh.com/gopher-luar v1.0.7 h1:53iv6CCkRs5wyofZ+qVXcyAYQOIG52s6pt4xkqZdq7k=
+layeh.com/gopher-luar v1.0.7/go.mod h1:TPnIVCZ2RJBndm7ohXyaqfhzjlZ+OA2SZR/YwL8tECk=

internal/action/actions_other.go

@@ -0,0 +1,8 @@
+// +build plan9 nacl windows
+
+package action
+
+func (*BufPane) Suspend() bool {
+	InfoBar.Error("Suspend is only supported on BSD/Linux")
+	return false
+}

internal/action/actions_posix.go

@@ -1,37 +1,27 @@
 // +build linux darwin dragonfly solaris openbsd netbsd freebsd
 
-package main
+package action
 
-import "syscall"
+import (
+	"syscall"
+
+	"github.com/zyedidia/micro/internal/screen"
+)
 
 // Suspend sends micro to the background. This is the same as pressing CtrlZ in most unix programs.
 // This only works on linux and has no default binding.
 // This code was adapted from the suspend code in nsf/godit
-func (v *View) Suspend(usePlugin bool) bool {
-	if usePlugin && !PreActionCall("Suspend", v) {
-		return false
-	}
-
-	screenWasNil := screen == nil
-
-	if !screenWasNil {
-		screen.Fini()
-		screen = nil
-	}
+func (*BufPane) Suspend() bool {
+	screenb := screen.TempFini()
 
 	// suspend the process
 	pid := syscall.Getpid()
 	err := syscall.Kill(pid, syscall.SIGSTOP)
 	if err != nil {
-		TermMessage(err)
+		screen.TermMessage(err)
 	}
 
-	if !screenWasNil {
-		InitScreen()
-	}
+	screen.TempStart(screenb)
 
-	if usePlugin {
-		return PostActionCall("Suspend", v)
-	}
-	return true
+	return false
 }

internal/action/bindings.go

@@ -0,0 +1,388 @@
+package action
+
+import (
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"os"
+	"strings"
+	"unicode"
+
+	"github.com/zyedidia/json5"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/tcell"
+)
+
+func InitBindings() {
+	config.Bindings = DefaultBindings()
+
+	var parsed map[string]string
+	defaults := DefaultBindings()
+
+	filename := config.ConfigDir + "/bindings.json"
+	if _, e := os.Stat(filename); e == nil {
+		input, err := ioutil.ReadFile(filename)
+		if err != nil {
+			screen.TermMessage("Error reading bindings.json file: " + err.Error())
+			return
+		}
+
+		err = json5.Unmarshal(input, &parsed)
+		if err != nil {
+			screen.TermMessage("Error reading bindings.json:", err.Error())
+		}
+	}
+
+	for k, v := range defaults {
+		BindKey(k, v)
+	}
+	for k, v := range parsed {
+		BindKey(k, v)
+	}
+}
+
+func BindKey(k, v string) {
+	event, ok := findEvent(k)
+	if !ok {
+		screen.TermMessage(k, "is not a bindable event")
+	}
+
+	switch e := event.(type) {
+	case KeyEvent:
+		BufMapKey(e, v)
+	case MouseEvent:
+		BufMapMouse(e, v)
+	case RawEvent:
+		BufMapKey(e, v)
+	}
+
+	config.Bindings[k] = v
+}
+
+// findEvent will find binding Key 'b' using string 'k'
+func findEvent(k string) (b Event, ok bool) {
+	modifiers := tcell.ModNone
+
+	// First, we'll strip off all the modifiers in the name and add them to the
+	// ModMask
+modSearch:
+	for {
+		switch {
+		case strings.HasPrefix(k, "-"):
+			// We optionally support dashes between modifiers
+			k = k[1:]
+		case strings.HasPrefix(k, "Ctrl") && k != "CtrlH":
+			// CtrlH technically does not have a 'Ctrl' modifier because it is really backspace
+			k = k[4:]
+			modifiers |= tcell.ModCtrl
+		case strings.HasPrefix(k, "Alt"):
+			k = k[3:]
+			modifiers |= tcell.ModAlt
+		case strings.HasPrefix(k, "Shift"):
+			k = k[5:]
+			modifiers |= tcell.ModShift
+		case strings.HasPrefix(k, "\x1b"):
+			screen.Screen.RegisterRawSeq(k)
+			return RawEvent{
+				esc: k,
+			}, true
+		default:
+			break modSearch
+		}
+	}
+
+	if len(k) == 0 {
+		return KeyEvent{}, false
+	}
+
+	// Control is handled in a special way, since the terminal sends explicitly
+	// marked escape sequences for control keys
+	// We should check for Control keys first
+	if modifiers&tcell.ModCtrl != 0 {
+		// see if the key is in bindingKeys with the Ctrl prefix.
+		k = string(unicode.ToUpper(rune(k[0]))) + k[1:]
+		if code, ok := keyEvents["Ctrl"+k]; ok {
+			var r tcell.Key
+			// Special case for escape, for some reason tcell doesn't send it with the esc character
+			if code < 256 && code != 27 {
+				r = code
+			}
+			// It is, we're done.
+			return KeyEvent{
+				code: code,
+				mod:  modifiers,
+				r:    rune(r),
+			}, true
+		}
+	}
+
+	// See if we can find the key in bindingKeys
+	if code, ok := keyEvents[k]; ok {
+		var r tcell.Key
+		// Special case for escape, for some reason tcell doesn't send it with the esc character
+		if code < 256 && code != 27 {
+			r = code
+		}
+		return KeyEvent{
+			code: code,
+			mod:  modifiers,
+			r:    rune(r),
+		}, true
+	}
+
+	// See if we can find the key in bindingMouse
+	if code, ok := mouseEvents[k]; ok {
+		return MouseEvent{
+			btn: code,
+			mod: modifiers,
+		}, true
+	}
+
+	// If we were given one character, then we've got a rune.
+	if len(k) == 1 {
+		return KeyEvent{
+			code: tcell.KeyRune,
+			mod:  modifiers,
+			r:    rune(k[0]),
+		}, true
+	}
+
+	// We don't know what happened.
+	return KeyEvent{}, false
+}
+
+// TryBindKey tries to bind a key by writing to config.ConfigDir/bindings.json
+// Returns true if the keybinding already existed and a possible error
+func TryBindKey(k, v string, overwrite bool) (bool, error) {
+	var e error
+	var parsed map[string]string
+
+	filename := config.ConfigDir + "/bindings.json"
+	if _, e = os.Stat(filename); e == nil {
+		input, err := ioutil.ReadFile(filename)
+		if err != nil {
+			return false, errors.New("Error reading bindings.json file: " + err.Error())
+		}
+
+		err = json5.Unmarshal(input, &parsed)
+		if err != nil {
+			return false, errors.New("Error reading bindings.json: " + err.Error())
+		}
+
+		key, ok := findEvent(k)
+		if !ok {
+			return false, errors.New("Invalid event " + k)
+		}
+
+		found := false
+		for ev := range parsed {
+			if e, ok := findEvent(ev); ok {
+				if e == key {
+					if overwrite {
+						parsed[ev] = v
+					}
+					found = true
+					break
+				}
+			}
+		}
+
+		if found && !overwrite {
+			return true, nil
+		} else if !found {
+			parsed[k] = v
+		}
+
+		BindKey(k, v)
+
+		txt, _ := json.MarshalIndent(parsed, "", "    ")
+		return true, ioutil.WriteFile(filename, append(txt, '\n'), 0644)
+	}
+	return false, e
+}
+
+// UnbindKey removes the binding for a key from the bindings.json file
+func UnbindKey(k string) error {
+	var e error
+	var parsed map[string]string
+
+	filename := config.ConfigDir + "/bindings.json"
+	if _, e = os.Stat(filename); e == nil {
+		input, err := ioutil.ReadFile(filename)
+		if err != nil {
+			return errors.New("Error reading bindings.json file: " + err.Error())
+		}
+
+		err = json5.Unmarshal(input, &parsed)
+		if err != nil {
+			return errors.New("Error reading bindings.json: " + err.Error())
+		}
+
+		key, ok := findEvent(k)
+		if !ok {
+			return errors.New("Invalid event " + k)
+		}
+
+		for ev := range parsed {
+			if e, ok := findEvent(ev); ok {
+				if e == key {
+					delete(parsed, ev)
+					break
+				}
+			}
+		}
+
+		defaults := DefaultBindings()
+		if a, ok := defaults[k]; ok {
+			BindKey(k, a)
+		} else if _, ok := config.Bindings[k]; ok {
+			delete(config.Bindings, k)
+		}
+
+		txt, _ := json.MarshalIndent(parsed, "", "    ")
+		return ioutil.WriteFile(filename, append(txt, '\n'), 0644)
+	}
+	return e
+}
+
+var mouseEvents = map[string]tcell.ButtonMask{
+	"MouseLeft":       tcell.Button1,
+	"MouseMiddle":     tcell.Button2,
+	"MouseRight":      tcell.Button3,
+	"MouseWheelUp":    tcell.WheelUp,
+	"MouseWheelDown":  tcell.WheelDown,
+	"MouseWheelLeft":  tcell.WheelLeft,
+	"MouseWheelRight": tcell.WheelRight,
+}
+
+var keyEvents = map[string]tcell.Key{
+	"Up":             tcell.KeyUp,
+	"Down":           tcell.KeyDown,
+	"Right":          tcell.KeyRight,
+	"Left":           tcell.KeyLeft,
+	"UpLeft":         tcell.KeyUpLeft,
+	"UpRight":        tcell.KeyUpRight,
+	"DownLeft":       tcell.KeyDownLeft,
+	"DownRight":      tcell.KeyDownRight,
+	"Center":         tcell.KeyCenter,
+	"PageUp":         tcell.KeyPgUp,
+	"PageDown":       tcell.KeyPgDn,
+	"Home":           tcell.KeyHome,
+	"End":            tcell.KeyEnd,
+	"Insert":         tcell.KeyInsert,
+	"Delete":         tcell.KeyDelete,
+	"Help":           tcell.KeyHelp,
+	"Exit":           tcell.KeyExit,
+	"Clear":          tcell.KeyClear,
+	"Cancel":         tcell.KeyCancel,
+	"Print":          tcell.KeyPrint,
+	"Pause":          tcell.KeyPause,
+	"Backtab":        tcell.KeyBacktab,
+	"F1":             tcell.KeyF1,
+	"F2":             tcell.KeyF2,
+	"F3":             tcell.KeyF3,
+	"F4":             tcell.KeyF4,
+	"F5":             tcell.KeyF5,
+	"F6":             tcell.KeyF6,
+	"F7":             tcell.KeyF7,
+	"F8":             tcell.KeyF8,
+	"F9":             tcell.KeyF9,
+	"F10":            tcell.KeyF10,
+	"F11":            tcell.KeyF11,
+	"F12":            tcell.KeyF12,
+	"F13":            tcell.KeyF13,
+	"F14":            tcell.KeyF14,
+	"F15":            tcell.KeyF15,
+	"F16":            tcell.KeyF16,
+	"F17":            tcell.KeyF17,
+	"F18":            tcell.KeyF18,
+	"F19":            tcell.KeyF19,
+	"F20":            tcell.KeyF20,
+	"F21":            tcell.KeyF21,
+	"F22":            tcell.KeyF22,
+	"F23":            tcell.KeyF23,
+	"F24":            tcell.KeyF24,
+	"F25":            tcell.KeyF25,
+	"F26":            tcell.KeyF26,
+	"F27":            tcell.KeyF27,
+	"F28":            tcell.KeyF28,
+	"F29":            tcell.KeyF29,
+	"F30":            tcell.KeyF30,
+	"F31":            tcell.KeyF31,
+	"F32":            tcell.KeyF32,
+	"F33":            tcell.KeyF33,
+	"F34":            tcell.KeyF34,
+	"F35":            tcell.KeyF35,
+	"F36":            tcell.KeyF36,
+	"F37":            tcell.KeyF37,
+	"F38":            tcell.KeyF38,
+	"F39":            tcell.KeyF39,
+	"F40":            tcell.KeyF40,
+	"F41":            tcell.KeyF41,
+	"F42":            tcell.KeyF42,
+	"F43":            tcell.KeyF43,
+	"F44":            tcell.KeyF44,
+	"F45":            tcell.KeyF45,
+	"F46":            tcell.KeyF46,
+	"F47":            tcell.KeyF47,
+	"F48":            tcell.KeyF48,
+	"F49":            tcell.KeyF49,
+	"F50":            tcell.KeyF50,
+	"F51":            tcell.KeyF51,
+	"F52":            tcell.KeyF52,
+	"F53":            tcell.KeyF53,
+	"F54":            tcell.KeyF54,
+	"F55":            tcell.KeyF55,
+	"F56":            tcell.KeyF56,
+	"F57":            tcell.KeyF57,
+	"F58":            tcell.KeyF58,
+	"F59":            tcell.KeyF59,
+	"F60":            tcell.KeyF60,
+	"F61":            tcell.KeyF61,
+	"F62":            tcell.KeyF62,
+	"F63":            tcell.KeyF63,
+	"F64":            tcell.KeyF64,
+	"CtrlSpace":      tcell.KeyCtrlSpace,
+	"CtrlA":          tcell.KeyCtrlA,
+	"CtrlB":          tcell.KeyCtrlB,
+	"CtrlC":          tcell.KeyCtrlC,
+	"CtrlD":          tcell.KeyCtrlD,
+	"CtrlE":          tcell.KeyCtrlE,
+	"CtrlF":          tcell.KeyCtrlF,
+	"CtrlG":          tcell.KeyCtrlG,
+	"CtrlH":          tcell.KeyCtrlH,
+	"CtrlI":          tcell.KeyCtrlI,
+	"CtrlJ":          tcell.KeyCtrlJ,
+	"CtrlK":          tcell.KeyCtrlK,
+	"CtrlL":          tcell.KeyCtrlL,
+	"CtrlM":          tcell.KeyCtrlM,
+	"CtrlN":          tcell.KeyCtrlN,
+	"CtrlO":          tcell.KeyCtrlO,
+	"CtrlP":          tcell.KeyCtrlP,
+	"CtrlQ":          tcell.KeyCtrlQ,
+	"CtrlR":          tcell.KeyCtrlR,
+	"CtrlS":          tcell.KeyCtrlS,
+	"CtrlT":          tcell.KeyCtrlT,
+	"CtrlU":          tcell.KeyCtrlU,
+	"CtrlV":          tcell.KeyCtrlV,
+	"CtrlW":          tcell.KeyCtrlW,
+	"CtrlX":          tcell.KeyCtrlX,
+	"CtrlY":          tcell.KeyCtrlY,
+	"CtrlZ":          tcell.KeyCtrlZ,
+	"CtrlLeftSq":     tcell.KeyCtrlLeftSq,
+	"CtrlBackslash":  tcell.KeyCtrlBackslash,
+	"CtrlRightSq":    tcell.KeyCtrlRightSq,
+	"CtrlCarat":      tcell.KeyCtrlCarat,
+	"CtrlUnderscore": tcell.KeyCtrlUnderscore,
+	"Tab":            tcell.KeyTab,
+	"Esc":            tcell.KeyEsc,
+	"Escape":         tcell.KeyEscape,
+	"Enter":          tcell.KeyEnter,
+	"Backspace":      tcell.KeyBackspace2,
+	"OldBackspace":   tcell.KeyBackspace,
+
+	// I renamed these keys to PageUp and PageDown but I don't want to break someone's keybindings
+	"PgUp":   tcell.KeyPgUp,
+	"PgDown": tcell.KeyPgDn,
+}

internal/action/bufpane.go

@@ -0,0 +1,671 @@
+package action
+
+import (
+	"strings"
+	"time"
+
+	luar "layeh.com/gopher-luar"
+
+	lua "github.com/yuin/gopher-lua"
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/display"
+	ulua "github.com/zyedidia/micro/internal/lua"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/tcell"
+)
+
+type BufKeyAction func(*BufPane) bool
+type BufMouseAction func(*BufPane, *tcell.EventMouse) bool
+
+var BufKeyBindings map[Event]BufKeyAction
+var BufKeyStrings map[Event]string
+var BufMouseBindings map[MouseEvent]BufMouseAction
+
+func init() {
+	BufKeyBindings = make(map[Event]BufKeyAction)
+	BufKeyStrings = make(map[Event]string)
+	BufMouseBindings = make(map[MouseEvent]BufMouseAction)
+}
+
+func LuaAction(fn string) func(*BufPane) bool {
+	luaFn := strings.Split(fn, ".")
+	if len(luaFn) <= 1 {
+		return nil
+	}
+	plName, plFn := luaFn[0], luaFn[1]
+	pl := config.FindPlugin(plName)
+	if pl == nil {
+		return nil
+	}
+	return func(h *BufPane) bool {
+		val, err := pl.Call(plFn, luar.New(ulua.L, h))
+		if err != nil {
+			screen.TermMessage(err)
+		}
+		if v, ok := val.(lua.LBool); !ok {
+			return false
+		} else {
+			return bool(v)
+		}
+	}
+}
+
+// BufMapKey maps a key event to an action
+func BufMapKey(k Event, action string) {
+	BufKeyStrings[k] = action
+	var actionfns []func(*BufPane) bool
+	var names []string
+	var types []byte
+	for i := 0; ; i++ {
+		if action == "" {
+			break
+		}
+
+		// TODO: fix problem when complex bindings have these
+		// characters (escape them?)
+		idx := strings.IndexAny(action, "&|,")
+		a := action
+		if idx >= 0 {
+			a = action[:idx]
+			types = append(types, action[idx])
+			action = action[idx+1:]
+		} else {
+			types = append(types, ' ')
+			action = ""
+		}
+
+		var afn func(*BufPane) bool
+		if strings.HasPrefix(a, "command:") {
+			a = strings.SplitN(a, ":", 2)[1]
+			afn = CommandAction(a)
+			names = append(names, "")
+		} else if strings.HasPrefix(a, "command-edit:") {
+			a = strings.SplitN(a, ":", 2)[1]
+			afn = CommandEditAction(a)
+			names = append(names, "")
+		} else if strings.HasPrefix(a, "lua:") {
+			a = strings.SplitN(a, ":", 2)[1]
+			afn = LuaAction(a)
+			if afn == nil {
+				screen.TermMessage("Lua Error:", a, "does not exist")
+				continue
+			}
+			split := strings.SplitN(a, ".", 2)
+			if len(split) > 1 {
+				a = strings.Title(split[0]) + strings.Title(split[1])
+			} else {
+				a = strings.Title(a)
+			}
+
+			names = append(names, a)
+		} else if f, ok := BufKeyActions[a]; ok {
+			afn = f
+			names = append(names, a)
+		} else {
+			screen.TermMessage("Error:", a, "does not exist")
+			continue
+		}
+		actionfns = append(actionfns, afn)
+	}
+	BufKeyBindings[k] = func(h *BufPane) bool {
+		cursors := h.Buf.GetCursors()
+		success := true
+		for i, a := range actionfns {
+			for j, c := range cursors {
+				h.Buf.SetCurCursor(c.Num)
+				h.Cursor = c
+				if i == 0 || (success && types[i-1] == '&') || (!success && types[i-1] == '|') || (types[i-1] == ',') {
+					success = h.execAction(a, names[i], j)
+				} else {
+					break
+				}
+			}
+		}
+		return true
+	}
+}
+
+// BufMapMouse maps a mouse event to an action
+func BufMapMouse(k MouseEvent, action string) {
+	if f, ok := BufMouseActions[action]; ok {
+		BufMouseBindings[k] = f
+	} else {
+		delete(BufMouseBindings, k)
+		BufMapKey(k, action)
+	}
+}
+
+// The BufPane connects the buffer and the window
+// It provides a cursor (or multiple) and defines a set of actions
+// that can be taken on the buffer
+// The ActionHandler can access the window for necessary info about
+// visual positions for mouse clicks and scrolling
+type BufPane struct {
+	display.BWindow
+
+	Buf *buffer.Buffer
+
+	Cursor *buffer.Cursor // the active cursor
+
+	// Since tcell doesn't differentiate between a mouse release event
+	// and a mouse move event with no keys pressed, we need to keep
+	// track of whether or not the mouse was pressed (or not released) last event to determine
+	// mouse release events
+	mouseReleased bool
+
+	// We need to keep track of insert key press toggle
+	isOverwriteMode bool
+	// This stores when the last click was
+	// This is useful for detecting double and triple clicks
+	lastClickTime time.Time
+	lastLoc       buffer.Loc
+
+	// lastCutTime stores when the last ctrl+k was issued.
+	// It is used for clearing the clipboard to replace it with fresh cut lines.
+	lastCutTime time.Time
+
+	// freshClip returns true if the clipboard has never been pasted.
+	freshClip bool
+
+	// Was the last mouse event actually a double click?
+	// Useful for detecting triple clicks -- if a double click is detected
+	// but the last mouse event was actually a double click, it's a triple click
+	doubleClick bool
+	// Same here, just to keep track for mouse move events
+	tripleClick bool
+
+	// Last search stores the last successful search for FindNext and FindPrev
+	lastSearch string
+	// Should the current multiple cursor selection search based on word or
+	// based on selection (false for selection, true for word)
+	multiWord bool
+
+	splitID uint64
+	tab     *Tab
+
+	// remember original location of a search in case the search is canceled
+	searchOrig buffer.Loc
+}
+
+func NewBufPane(buf *buffer.Buffer, win display.BWindow, tab *Tab) *BufPane {
+	h := new(BufPane)
+	h.Buf = buf
+	h.BWindow = win
+	h.tab = tab
+
+	h.Cursor = h.Buf.GetActiveCursor()
+	h.mouseReleased = true
+
+	config.RunPluginFn("onBufPaneOpen", luar.New(ulua.L, h))
+
+	return h
+}
+
+func NewBufPaneFromBuf(buf *buffer.Buffer, tab *Tab) *BufPane {
+	w := display.NewBufWindow(0, 0, 0, 0, buf)
+	return NewBufPane(buf, w, tab)
+}
+
+func (h *BufPane) SetTab(t *Tab) {
+	h.tab = t
+}
+
+func (h *BufPane) Tab() *Tab {
+	return h.tab
+}
+
+func (h *BufPane) ResizePane(size int) {
+	n := h.tab.GetNode(h.splitID)
+	n.ResizeSplit(size)
+	h.tab.Resize()
+}
+
+// PluginCB calls all plugin callbacks with a certain name and
+// displays an error if there is one and returns the aggregrate
+// boolean response
+func (h *BufPane) PluginCB(cb string) bool {
+	b, err := config.RunPluginFnBool(cb, luar.New(ulua.L, h))
+	if err != nil {
+		screen.TermMessage(err)
+	}
+	return b
+}
+
+// PluginCBRune is the same as PluginCB but also passes a rune to
+// the plugins
+func (h *BufPane) PluginCBRune(cb string, r rune) bool {
+	b, err := config.RunPluginFnBool(cb, luar.New(ulua.L, h), luar.New(ulua.L, string(r)))
+	if err != nil {
+		screen.TermMessage(err)
+	}
+	return b
+}
+
+func (h *BufPane) OpenBuffer(b *buffer.Buffer) {
+	h.Buf.Close()
+	h.Buf = b
+	h.BWindow.SetBuffer(b)
+	h.Cursor = b.GetActiveCursor()
+	h.Resize(h.GetView().Width, h.GetView().Height)
+	h.Relocate()
+	// Set mouseReleased to true because we assume the mouse is not being pressed when
+	// the editor is opened
+	h.mouseReleased = true
+	// Set isOverwriteMode to false, because we assume we are in the default mode when editor
+	// is opened
+	h.isOverwriteMode = false
+	h.lastClickTime = time.Time{}
+}
+
+func (h *BufPane) ID() uint64 {
+	return h.splitID
+}
+
+func (h *BufPane) SetID(i uint64) {
+	h.splitID = i
+}
+
+func (h *BufPane) Name() string {
+	return h.Buf.GetName()
+}
+
+// HandleEvent executes the tcell event properly
+func (h *BufPane) HandleEvent(event tcell.Event) {
+	if h.Buf.ExternallyModified() {
+		InfoBar.YNPrompt("The file on disk has changed. Reload file? (y,n)", func(yes, canceled bool) {
+			if !yes || canceled {
+				h.Buf.UpdateModTime()
+			} else {
+				h.Buf.ReOpen()
+			}
+		})
+
+	}
+
+	switch e := event.(type) {
+	case *tcell.EventRaw:
+		re := RawEvent{
+			esc: e.EscSeq(),
+		}
+		h.DoKeyEvent(re)
+	case *tcell.EventPaste:
+		h.paste(e.Text())
+		h.Relocate()
+	case *tcell.EventKey:
+		ke := KeyEvent{
+			code: e.Key(),
+			mod:  e.Modifiers(),
+			r:    e.Rune(),
+		}
+
+		done := h.DoKeyEvent(ke)
+		if !done && e.Key() == tcell.KeyRune {
+			h.DoRuneInsert(e.Rune())
+		}
+	case *tcell.EventMouse:
+		cancel := false
+		switch e.Buttons() {
+		case tcell.Button1:
+			_, my := e.Position()
+			if h.Buf.Settings["statusline"].(bool) && my >= h.GetView().Y+h.GetView().Height-1 {
+				cancel = true
+			}
+		case tcell.ButtonNone:
+			// Mouse event with no click
+			if !h.mouseReleased {
+				// Mouse was just released
+
+				// mx, my := e.Position()
+				// mouseLoc := h.LocFromVisual(buffer.Loc{X: mx, Y: my})
+
+				// we could finish the selection based on the release location as described
+				// below but when the mouse click is within the scroll margin this will
+				// cause a scroll and selection even for a simple mouse click which is
+				// not good
+				// for terminals that don't support mouse motion events, selection via
+				// the mouse won't work but this is ok
+
+				// Relocating here isn't really necessary because the cursor will
+				// be in the right place from the last mouse event
+				// However, if we are running in a terminal that doesn't support mouse motion
+				// events, this still allows the user to make selections, except only after they
+				// release the mouse
+
+				// if !h.doubleClick && !h.tripleClick {
+				// 	h.Cursor.Loc = mouseLoc
+				// 	h.Cursor.SetSelectionEnd(h.Cursor.Loc)
+				// 	h.Cursor.CopySelection("primary")
+				// }
+				h.mouseReleased = true
+			}
+		}
+
+		if !cancel {
+			me := MouseEvent{
+				btn: e.Buttons(),
+				mod: e.Modifiers(),
+			}
+			h.DoMouseEvent(me, e)
+		}
+	}
+	h.Buf.MergeCursors()
+
+	if h.IsActive() {
+		// Display any gutter messages for this line
+		c := h.Buf.GetActiveCursor()
+		none := true
+		for _, m := range h.Buf.Messages {
+			if c.Y == m.Start.Y || c.Y == m.End.Y {
+				InfoBar.GutterMessage(m.Msg)
+				none = false
+				break
+			}
+		}
+		if none && InfoBar.HasGutter {
+			InfoBar.ClearGutter()
+		}
+	}
+}
+
+// DoKeyEvent executes a key event by finding the action it is bound
+// to and executing it (possibly multiple times for multiple cursors)
+func (h *BufPane) DoKeyEvent(e Event) bool {
+	if action, ok := BufKeyBindings[e]; ok {
+		return action(h)
+	}
+	return false
+}
+
+func (h *BufPane) execAction(action func(*BufPane) bool, name string, cursor int) bool {
+	if name != "Autocomplete" && name != "CycleAutocompleteBack" {
+		h.Buf.HasSuggestions = false
+	}
+
+	_, isMulti := MultiActions[name]
+	if (!isMulti && cursor == 0) || isMulti {
+		if h.PluginCB("pre" + name) {
+			success := action(h)
+			success = success && h.PluginCB("on"+name)
+
+			if isMulti {
+				if recording_macro {
+					if name != "ToggleMacro" && name != "PlayMacro" {
+						curmacro = append(curmacro, action)
+					}
+				}
+			}
+
+			return success
+		}
+	}
+
+	return false
+}
+
+func (h *BufPane) completeAction(action string) {
+	h.PluginCB("on" + action)
+}
+
+func (h *BufPane) HasKeyEvent(e Event) bool {
+	_, ok := BufKeyBindings[e]
+	return ok
+}
+
+// DoMouseEvent executes a mouse event by finding the action it is bound
+// to and executing it
+func (h *BufPane) DoMouseEvent(e MouseEvent, te *tcell.EventMouse) bool {
+	if action, ok := BufMouseBindings[e]; ok {
+		if action(h, te) {
+			h.Relocate()
+		}
+		return true
+	} else if h.HasKeyEvent(e) {
+		return h.DoKeyEvent(e)
+	}
+	return false
+}
+
+// DoRuneInsert inserts a given rune into the current buffer
+// (possibly multiple times for multiple cursors)
+func (h *BufPane) DoRuneInsert(r rune) {
+	cursors := h.Buf.GetCursors()
+	for _, c := range cursors {
+		// Insert a character
+		h.Buf.SetCurCursor(c.Num)
+		h.Cursor = c
+		if !h.PluginCBRune("preRune", r) {
+			continue
+		}
+		if c.HasSelection() {
+			c.DeleteSelection()
+			c.ResetSelection()
+		}
+
+		if h.isOverwriteMode {
+			next := c.Loc
+			next.X++
+			h.Buf.Replace(c.Loc, next, string(r))
+		} else {
+			h.Buf.Insert(c.Loc, string(r))
+		}
+		if recording_macro {
+			curmacro = append(curmacro, r)
+		}
+		h.PluginCBRune("onRune", r)
+	}
+}
+
+func (h *BufPane) VSplitIndex(buf *buffer.Buffer, right bool) *BufPane {
+	e := NewBufPaneFromBuf(buf, h.tab)
+	e.splitID = MainTab().GetNode(h.splitID).VSplit(right)
+	MainTab().Panes = append(MainTab().Panes, e)
+	MainTab().Resize()
+	MainTab().SetActive(len(MainTab().Panes) - 1)
+	return e
+}
+func (h *BufPane) HSplitIndex(buf *buffer.Buffer, bottom bool) *BufPane {
+	e := NewBufPaneFromBuf(buf, h.tab)
+	e.splitID = MainTab().GetNode(h.splitID).HSplit(bottom)
+	MainTab().Panes = append(MainTab().Panes, e)
+	MainTab().Resize()
+	MainTab().SetActive(len(MainTab().Panes) - 1)
+	return e
+}
+
+func (h *BufPane) VSplitBuf(buf *buffer.Buffer) *BufPane {
+	return h.VSplitIndex(buf, h.Buf.Settings["splitright"].(bool))
+}
+func (h *BufPane) HSplitBuf(buf *buffer.Buffer) *BufPane {
+	return h.HSplitIndex(buf, h.Buf.Settings["splitbottom"].(bool))
+}
+func (h *BufPane) Close() {
+	h.Buf.Close()
+}
+
+func (h *BufPane) SetActive(b bool) {
+	h.BWindow.SetActive(b)
+	if b {
+		// Display any gutter messages for this line
+		c := h.Buf.GetActiveCursor()
+		none := true
+		for _, m := range h.Buf.Messages {
+			if c.Y == m.Start.Y || c.Y == m.End.Y {
+				InfoBar.GutterMessage(m.Msg)
+				none = false
+				break
+			}
+		}
+		if none && InfoBar.HasGutter {
+			InfoBar.ClearGutter()
+		}
+	}
+
+}
+
+// BufKeyActions contains the list of all possible key actions the bufhandler could execute
+var BufKeyActions = map[string]BufKeyAction{
+	"CursorUp":               (*BufPane).CursorUp,
+	"CursorDown":             (*BufPane).CursorDown,
+	"CursorPageUp":           (*BufPane).CursorPageUp,
+	"CursorPageDown":         (*BufPane).CursorPageDown,
+	"CursorLeft":             (*BufPane).CursorLeft,
+	"CursorRight":            (*BufPane).CursorRight,
+	"CursorStart":            (*BufPane).CursorStart,
+	"CursorEnd":              (*BufPane).CursorEnd,
+	"SelectToStart":          (*BufPane).SelectToStart,
+	"SelectToEnd":            (*BufPane).SelectToEnd,
+	"SelectUp":               (*BufPane).SelectUp,
+	"SelectDown":             (*BufPane).SelectDown,
+	"SelectLeft":             (*BufPane).SelectLeft,
+	"SelectRight":            (*BufPane).SelectRight,
+	"WordRight":              (*BufPane).WordRight,
+	"WordLeft":               (*BufPane).WordLeft,
+	"SelectWordRight":        (*BufPane).SelectWordRight,
+	"SelectWordLeft":         (*BufPane).SelectWordLeft,
+	"DeleteWordRight":        (*BufPane).DeleteWordRight,
+	"DeleteWordLeft":         (*BufPane).DeleteWordLeft,
+	"SelectLine":             (*BufPane).SelectLine,
+	"SelectToStartOfLine":    (*BufPane).SelectToStartOfLine,
+	"SelectToStartOfText":    (*BufPane).SelectToStartOfText,
+	"SelectToEndOfLine":      (*BufPane).SelectToEndOfLine,
+	"ParagraphPrevious":      (*BufPane).ParagraphPrevious,
+	"ParagraphNext":          (*BufPane).ParagraphNext,
+	"InsertNewline":          (*BufPane).InsertNewline,
+	"Backspace":              (*BufPane).Backspace,
+	"Delete":                 (*BufPane).Delete,
+	"InsertTab":              (*BufPane).InsertTab,
+	"Save":                   (*BufPane).Save,
+	"SaveAll":                (*BufPane).SaveAll,
+	"SaveAs":                 (*BufPane).SaveAs,
+	"Find":                   (*BufPane).Find,
+	"FindNext":               (*BufPane).FindNext,
+	"FindPrevious":           (*BufPane).FindPrevious,
+	"Center":                 (*BufPane).Center,
+	"Undo":                   (*BufPane).Undo,
+	"Redo":                   (*BufPane).Redo,
+	"Copy":                   (*BufPane).Copy,
+	"Cut":                    (*BufPane).Cut,
+	"CutLine":                (*BufPane).CutLine,
+	"DuplicateLine":          (*BufPane).DuplicateLine,
+	"DeleteLine":             (*BufPane).DeleteLine,
+	"MoveLinesUp":            (*BufPane).MoveLinesUp,
+	"MoveLinesDown":          (*BufPane).MoveLinesDown,
+	"IndentSelection":        (*BufPane).IndentSelection,
+	"OutdentSelection":       (*BufPane).OutdentSelection,
+	"Autocomplete":           (*BufPane).Autocomplete,
+	"CycleAutocompleteBack":  (*BufPane).CycleAutocompleteBack,
+	"OutdentLine":            (*BufPane).OutdentLine,
+	"Paste":                  (*BufPane).Paste,
+	"PastePrimary":           (*BufPane).PastePrimary,
+	"SelectAll":              (*BufPane).SelectAll,
+	"OpenFile":               (*BufPane).OpenFile,
+	"Start":                  (*BufPane).Start,
+	"End":                    (*BufPane).End,
+	"PageUp":                 (*BufPane).PageUp,
+	"PageDown":               (*BufPane).PageDown,
+	"SelectPageUp":           (*BufPane).SelectPageUp,
+	"SelectPageDown":         (*BufPane).SelectPageDown,
+	"HalfPageUp":             (*BufPane).HalfPageUp,
+	"HalfPageDown":           (*BufPane).HalfPageDown,
+	"StartOfText":            (*BufPane).StartOfText,
+	"StartOfLine":            (*BufPane).StartOfLine,
+	"EndOfLine":              (*BufPane).EndOfLine,
+	"ToggleHelp":             (*BufPane).ToggleHelp,
+	"ToggleKeyMenu":          (*BufPane).ToggleKeyMenu,
+	"ToggleRuler":            (*BufPane).ToggleRuler,
+	"ClearStatus":            (*BufPane).ClearStatus,
+	"ShellMode":              (*BufPane).ShellMode,
+	"CommandMode":            (*BufPane).CommandMode,
+	"ToggleOverwriteMode":    (*BufPane).ToggleOverwriteMode,
+	"Escape":                 (*BufPane).Escape,
+	"Quit":                   (*BufPane).Quit,
+	"QuitAll":                (*BufPane).QuitAll,
+	"AddTab":                 (*BufPane).AddTab,
+	"PreviousTab":            (*BufPane).PreviousTab,
+	"NextTab":                (*BufPane).NextTab,
+	"NextSplit":              (*BufPane).NextSplit,
+	"PreviousSplit":          (*BufPane).PreviousSplit,
+	"Unsplit":                (*BufPane).Unsplit,
+	"VSplit":                 (*BufPane).VSplitAction,
+	"HSplit":                 (*BufPane).HSplitAction,
+	"ToggleMacro":            (*BufPane).ToggleMacro,
+	"PlayMacro":              (*BufPane).PlayMacro,
+	"Suspend":                (*BufPane).Suspend,
+	"ScrollUp":               (*BufPane).ScrollUpAction,
+	"ScrollDown":             (*BufPane).ScrollDownAction,
+	"SpawnMultiCursor":       (*BufPane).SpawnMultiCursor,
+	"SpawnMultiCursorUp":     (*BufPane).SpawnMultiCursorUp,
+	"SpawnMultiCursorDown":   (*BufPane).SpawnMultiCursorDown,
+	"SpawnMultiCursorSelect": (*BufPane).SpawnMultiCursorSelect,
+	"RemoveMultiCursor":      (*BufPane).RemoveMultiCursor,
+	"RemoveAllMultiCursors":  (*BufPane).RemoveAllMultiCursors,
+	"SkipMultiCursor":        (*BufPane).SkipMultiCursor,
+	"JumpToMatchingBrace":    (*BufPane).JumpToMatchingBrace,
+	"None":                   (*BufPane).None,
+
+	// This was changed to InsertNewline but I don't want to break backwards compatibility
+	"InsertEnter": (*BufPane).InsertNewline,
+}
+
+// BufMouseActions contains the list of all possible mouse actions the bufhandler could execute
+var BufMouseActions = map[string]BufMouseAction{
+	"MousePress":       (*BufPane).MousePress,
+	"MouseMultiCursor": (*BufPane).MouseMultiCursor,
+}
+
+// MultiActions is a list of actions that should be executed multiple
+// times if there are multiple cursors (one per cursor)
+// Generally actions that modify global editor state like quitting or
+// saving should not be included in this list
+var MultiActions = map[string]bool{
+	"CursorUp":            true,
+	"CursorDown":          true,
+	"CursorPageUp":        true,
+	"CursorPageDown":      true,
+	"CursorLeft":          true,
+	"CursorRight":         true,
+	"CursorStart":         true,
+	"CursorEnd":           true,
+	"SelectToStart":       true,
+	"SelectToEnd":         true,
+	"SelectUp":            true,
+	"SelectDown":          true,
+	"SelectLeft":          true,
+	"SelectRight":         true,
+	"WordRight":           true,
+	"WordLeft":            true,
+	"SelectWordRight":     true,
+	"SelectWordLeft":      true,
+	"DeleteWordRight":     true,
+	"DeleteWordLeft":      true,
+	"SelectLine":          true,
+	"SelectToStartOfLine": true,
+	"SelectToStartOfText": true,
+	"SelectToEndOfLine":   true,
+	"ParagraphPrevious":   true,
+	"ParagraphNext":       true,
+	"InsertNewline":       true,
+	"Backspace":           true,
+	"Delete":              true,
+	"InsertTab":           true,
+	"FindNext":            true,
+	"FindPrevious":        true,
+	"Cut":                 true,
+	"CutLine":             true,
+	"DuplicateLine":       true,
+	"DeleteLine":          true,
+	"MoveLinesUp":         true,
+	"MoveLinesDown":       true,
+	"IndentSelection":     true,
+	"OutdentSelection":    true,
+	"OutdentLine":         true,
+	"Paste":               true,
+	"PastePrimary":        true,
+	"SelectPageUp":        true,
+	"SelectPageDown":      true,
+	"StartOfLine":         true,
+	"StartOfText":         true,
+	"EndOfLine":           true,
+	"JumpToMatchingBrace": true,
+}

internal/action/command.go

@@ -0,0 +1,884 @@
+package action
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	shellquote "github.com/kballard/go-shellquote"
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/shell"
+	"github.com/zyedidia/micro/internal/util"
+)
+
+// A Command contains information about how to execute a command
+// It has the action for that command as well as a completer function
+type Command struct {
+	action    func(*BufPane, []string)
+	completer buffer.Completer
+}
+
+var commands map[string]Command
+
+func InitCommands() {
+	commands = map[string]Command{
+		"set":        {(*BufPane).SetCmd, OptionValueComplete},
+		"reset":      {(*BufPane).ResetCmd, OptionValueComplete},
+		"setlocal":   {(*BufPane).SetLocalCmd, OptionValueComplete},
+		"show":       {(*BufPane).ShowCmd, OptionComplete},
+		"showkey":    {(*BufPane).ShowKeyCmd, nil},
+		"run":        {(*BufPane).RunCmd, nil},
+		"bind":       {(*BufPane).BindCmd, nil},
+		"unbind":     {(*BufPane).UnbindCmd, nil},
+		"quit":       {(*BufPane).QuitCmd, nil},
+		"goto":       {(*BufPane).GotoCmd, nil},
+		"save":       {(*BufPane).SaveCmd, nil},
+		"replace":    {(*BufPane).ReplaceCmd, nil},
+		"replaceall": {(*BufPane).ReplaceAllCmd, nil},
+		"vsplit":     {(*BufPane).VSplitCmd, buffer.FileComplete},
+		"hsplit":     {(*BufPane).HSplitCmd, buffer.FileComplete},
+		"tab":        {(*BufPane).NewTabCmd, buffer.FileComplete},
+		"help":       {(*BufPane).HelpCmd, HelpComplete},
+		"eval":       {(*BufPane).EvalCmd, nil},
+		"log":        {(*BufPane).ToggleLogCmd, nil},
+		"plugin":     {(*BufPane).PluginCmd, PluginComplete},
+		"reload":     {(*BufPane).ReloadCmd, nil},
+		"reopen":     {(*BufPane).ReopenCmd, nil},
+		"cd":         {(*BufPane).CdCmd, buffer.FileComplete},
+		"pwd":        {(*BufPane).PwdCmd, nil},
+		"open":       {(*BufPane).OpenCmd, buffer.FileComplete},
+		"tabswitch":  {(*BufPane).TabSwitchCmd, nil},
+		"term":       {(*BufPane).TermCmd, nil},
+		"memusage":   {(*BufPane).MemUsageCmd, nil},
+		"retab":      {(*BufPane).RetabCmd, nil},
+		"raw":        {(*BufPane).RawCmd, nil},
+		"textfilter": {(*BufPane).TextFilterCmd, nil},
+	}
+}
+
+// MakeCommand is a function to easily create new commands
+// This can be called by plugins in Lua so that plugins can define their own commands
+func MakeCommand(name string, action func(bp *BufPane, args []string), completer buffer.Completer) {
+	if action != nil {
+		commands[name] = Command{action, completer}
+	}
+}
+
+// CommandEditAction returns a bindable function that opens a prompt with
+// the given string and executes the command when the user presses
+// enter
+func CommandEditAction(prompt string) BufKeyAction {
+	return func(h *BufPane) bool {
+		InfoBar.Prompt("> ", prompt, "Command", nil, func(resp string, canceled bool) {
+			if !canceled {
+				MainTab().CurPane().HandleCommand(resp)
+			}
+		})
+		return false
+	}
+}
+
+// CommandAction returns a bindable function which executes the
+// given command
+func CommandAction(cmd string) BufKeyAction {
+	return func(h *BufPane) bool {
+		MainTab().CurPane().HandleCommand(cmd)
+		return false
+	}
+}
+
+var PluginCmds = []string{"install", "remove", "update", "available", "list", "search"}
+
+// PluginCmd installs, removes, updates, lists, or searches for given plugins
+func (h *BufPane) PluginCmd(args []string) {
+	if len(args) < 1 {
+		InfoBar.Error("Not enough arguments")
+		return
+	}
+
+	if h.Buf.Type != buffer.BTLog {
+		OpenLogBuf(h)
+	}
+
+	config.PluginCommand(buffer.LogBuf, args[0], args[1:])
+}
+
+// RetabCmd changes all spaces to tabs or all tabs to spaces
+// depending on the user's settings
+func (h *BufPane) RetabCmd(args []string) {
+	h.Buf.Retab()
+}
+
+// RawCmd opens a new raw view which displays the escape sequences micro
+// is receiving in real-time
+func (h *BufPane) RawCmd(args []string) {
+	width, height := screen.Screen.Size()
+	iOffset := config.GetInfoBarOffset()
+	tp := NewTabFromPane(0, 0, width, height-iOffset, NewRawPane(nil))
+	Tabs.AddTab(tp)
+	Tabs.SetActive(len(Tabs.List) - 1)
+}
+
+// TextFilterCmd filters the selection through the command.
+// Selection goes to the command input.
+// On successful run command output replaces the current selection.
+func (h *BufPane) TextFilterCmd(args []string) {
+	if len(args) == 0 {
+		InfoBar.Error("usage: textfilter arguments")
+		return
+	}
+	sel := h.Cursor.GetSelection()
+	if len(sel) == 0 {
+		h.Cursor.SelectWord()
+		sel = h.Cursor.GetSelection()
+	}
+	var bout, berr bytes.Buffer
+	cmd := exec.Command(args[0], args[1:]...)
+	cmd.Stdin = strings.NewReader(string(sel))
+	cmd.Stderr = &berr
+	cmd.Stdout = &bout
+	err := cmd.Run()
+	if err != nil {
+		InfoBar.Error(err.Error() + " " + berr.String())
+		return
+	}
+	h.Cursor.DeleteSelection()
+	h.Buf.Insert(h.Cursor.Loc, bout.String())
+}
+
+// TabSwitchCmd switches to a given tab either by name or by number
+func (h *BufPane) TabSwitchCmd(args []string) {
+	if len(args) > 0 {
+		num, err := strconv.Atoi(args[0])
+		if err != nil {
+			// Check for tab with this name
+
+			found := false
+			for i, t := range Tabs.List {
+				if t.Panes[t.active].Name() == args[0] {
+					Tabs.SetActive(i)
+					found = true
+				}
+			}
+			if !found {
+				InfoBar.Error("Could not find tab: ", err)
+			}
+		} else {
+			num--
+			if num >= 0 && num < len(Tabs.List) {
+				Tabs.SetActive(num)
+			} else {
+				InfoBar.Error("Invalid tab index")
+			}
+		}
+	}
+}
+
+// CdCmd changes the current working directory
+func (h *BufPane) CdCmd(args []string) {
+	if len(args) > 0 {
+		path, err := util.ReplaceHome(args[0])
+		if err != nil {
+			InfoBar.Error(err)
+			return
+		}
+		err = os.Chdir(path)
+		if err != nil {
+			InfoBar.Error(err)
+			return
+		}
+		wd, _ := os.Getwd()
+		for _, b := range buffer.OpenBuffers {
+			if len(b.Path) > 0 {
+				b.Path, _ = util.MakeRelative(b.AbsPath, wd)
+				if p, _ := filepath.Abs(b.Path); !strings.Contains(p, wd) {
+					b.Path = b.AbsPath
+				}
+			}
+		}
+	}
+}
+
+// MemUsageCmd prints micro's memory usage
+// Alloc shows how many bytes are currently in use
+// Sys shows how many bytes have been requested from the operating system
+// NumGC shows how many times the GC has been run
+// Note that Go commonly reserves more memory from the OS than is currently in-use/required
+// Additionally, even if Go returns memory to the OS, the OS does not always claim it because
+// there may be plenty of memory to spare
+func (h *BufPane) MemUsageCmd(args []string) {
+	InfoBar.Message(util.GetMemStats())
+}
+
+// PwdCmd prints the current working directory
+func (h *BufPane) PwdCmd(args []string) {
+	wd, err := os.Getwd()
+	if err != nil {
+		InfoBar.Message(err.Error())
+	} else {
+		InfoBar.Message(wd)
+	}
+}
+
+// OpenCmd opens a new buffer with a given filename
+func (h *BufPane) OpenCmd(args []string) {
+	if len(args) > 0 {
+		filename := args[0]
+		// the filename might or might not be quoted, so unquote first then join the strings.
+		args, err := shellquote.Split(filename)
+		if err != nil {
+			InfoBar.Error("Error parsing args ", err)
+			return
+		}
+		if len(args) == 0 {
+			return
+		}
+		filename = strings.Join(args, " ")
+
+		open := func() {
+			b, err := buffer.NewBufferFromFile(filename, buffer.BTDefault)
+			if err != nil {
+				InfoBar.Error(err)
+				return
+			}
+			h.OpenBuffer(b)
+		}
+		if h.Buf.Modified() {
+			InfoBar.YNPrompt("Save changes to "+h.Buf.GetName()+" before closing? (y,n,esc)", func(yes, canceled bool) {
+				if !canceled && !yes {
+					open()
+				} else if !canceled && yes {
+					h.Save()
+					open()
+				}
+			})
+		} else {
+			open()
+		}
+	} else {
+		InfoBar.Error("No filename")
+	}
+}
+
+// ToggleLogCmd toggles the log view
+func (h *BufPane) ToggleLogCmd(args []string) {
+	if h.Buf.Type != buffer.BTLog {
+		OpenLogBuf(h)
+	} else {
+		h.Quit()
+	}
+}
+
+// ReloadCmd reloads all files (syntax files, colorschemes...)
+func (h *BufPane) ReloadCmd(args []string) {
+	ReloadConfig()
+}
+
+func ReloadConfig() {
+	config.InitRuntimeFiles()
+	err := config.ReadSettings()
+	if err != nil {
+		screen.TermMessage(err)
+	}
+	config.InitGlobalSettings()
+	InitBindings()
+	InitCommands()
+
+	err = config.InitColorscheme()
+	if err != nil {
+		screen.TermMessage(err)
+	}
+
+	for _, b := range buffer.OpenBuffers {
+		b.UpdateRules()
+	}
+}
+
+// ReopenCmd reopens the buffer (reload from disk)
+func (h *BufPane) ReopenCmd(args []string) {
+	if h.Buf.Modified() {
+		InfoBar.YNPrompt("Save file before reopen?", func(yes, canceled bool) {
+			if !canceled && yes {
+				h.Save()
+				h.Buf.ReOpen()
+			} else if !canceled {
+				h.Buf.ReOpen()
+			}
+		})
+	} else {
+		h.Buf.ReOpen()
+	}
+}
+
+func (h *BufPane) openHelp(page string) error {
+	if data, err := config.FindRuntimeFile(config.RTHelp, page).Data(); err != nil {
+		return errors.New(fmt.Sprint("Unable to load help text", page, "\n", err))
+	} else {
+		helpBuffer := buffer.NewBufferFromString(string(data), page+".md", buffer.BTHelp)
+		helpBuffer.SetName("Help " + page)
+
+		if h.Buf.Type == buffer.BTHelp {
+			h.OpenBuffer(helpBuffer)
+		} else {
+			h.HSplitBuf(helpBuffer)
+		}
+	}
+	return nil
+}
+
+// HelpCmd tries to open the given help page in a horizontal split
+func (h *BufPane) HelpCmd(args []string) {
+	if len(args) < 1 {
+		// Open the default help if the user just typed "> help"
+		h.openHelp("help")
+	} else {
+		if config.FindRuntimeFile(config.RTHelp, args[0]) != nil {
+			err := h.openHelp(args[0])
+			if err != nil {
+				InfoBar.Error(err)
+			}
+		} else {
+			InfoBar.Error("Sorry, no help for ", args[0])
+		}
+	}
+}
+
+// VSplitCmd opens a vertical split with file given in the first argument
+// If no file is given, it opens an empty buffer in a new split
+func (h *BufPane) VSplitCmd(args []string) {
+	if len(args) == 0 {
+		// Open an empty vertical split
+		h.VSplitAction()
+		return
+	}
+
+	buf, err := buffer.NewBufferFromFile(args[0], buffer.BTDefault)
+	if err != nil {
+		InfoBar.Error(err)
+		return
+	}
+
+	h.VSplitBuf(buf)
+}
+
+// HSplitCmd opens a horizontal split with file given in the first argument
+// If no file is given, it opens an empty buffer in a new split
+func (h *BufPane) HSplitCmd(args []string) {
+	if len(args) == 0 {
+		// Open an empty horizontal split
+		h.HSplitAction()
+		return
+	}
+
+	buf, err := buffer.NewBufferFromFile(args[0], buffer.BTDefault)
+	if err != nil {
+		InfoBar.Error(err)
+		return
+	}
+
+	h.HSplitBuf(buf)
+}
+
+// EvalCmd evaluates a lua expression
+func (h *BufPane) EvalCmd(args []string) {
+	InfoBar.Error("Eval unsupported")
+}
+
+// NewTabCmd opens the given file in a new tab
+func (h *BufPane) NewTabCmd(args []string) {
+	width, height := screen.Screen.Size()
+	iOffset := config.GetInfoBarOffset()
+	if len(args) > 0 {
+		for _, a := range args {
+			b, err := buffer.NewBufferFromFile(a, buffer.BTDefault)
+			if err != nil {
+				InfoBar.Error(err)
+				return
+			}
+			tp := NewTabFromBuffer(0, 0, width, height-1-iOffset, b)
+			Tabs.AddTab(tp)
+			Tabs.SetActive(len(Tabs.List) - 1)
+		}
+	} else {
+		b := buffer.NewBufferFromString("", "", buffer.BTDefault)
+		tp := NewTabFromBuffer(0, 0, width, height-iOffset, b)
+		Tabs.AddTab(tp)
+		Tabs.SetActive(len(Tabs.List) - 1)
+	}
+}
+
+func SetGlobalOptionNative(option string, nativeValue interface{}) error {
+	local := false
+	for _, s := range config.LocalSettings {
+		if s == option {
+			local = true
+			break
+		}
+	}
+
+	if !local {
+		config.GlobalSettings[option] = nativeValue
+
+		if option == "colorscheme" {
+			// LoadSyntaxFiles()
+			config.InitColorscheme()
+			for _, b := range buffer.OpenBuffers {
+				b.UpdateRules()
+			}
+		} else if option == "infobar" || option == "keymenu" {
+			Tabs.Resize()
+		} else if option == "mouse" {
+			if !nativeValue.(bool) {
+				screen.Screen.DisableMouse()
+			} else {
+				screen.Screen.EnableMouse()
+			}
+		} else if option == "autosave" {
+			if nativeValue.(float64) > 0 {
+				config.SetAutoTime(int(nativeValue.(float64)))
+				config.StartAutoSave()
+			} else {
+				config.SetAutoTime(0)
+			}
+		} else if option == "paste" {
+			screen.Screen.SetPaste(nativeValue.(bool))
+		} else {
+			for _, pl := range config.Plugins {
+				if option == pl.Name {
+					if nativeValue.(bool) && !pl.Loaded {
+						pl.Load()
+						_, err := pl.Call("init")
+						if err != nil && err != config.ErrNoSuchFunction {
+							screen.TermMessage(err)
+						}
+					} else if !nativeValue.(bool) && pl.Loaded {
+						_, err := pl.Call("deinit")
+						if err != nil && err != config.ErrNoSuchFunction {
+							screen.TermMessage(err)
+						}
+					}
+				}
+			}
+		}
+	}
+
+	for _, b := range buffer.OpenBuffers {
+		b.SetOptionNative(option, nativeValue)
+	}
+
+	return config.WriteSettings(config.ConfigDir + "/settings.json")
+}
+
+func SetGlobalOption(option, value string) error {
+	if _, ok := config.GlobalSettings[option]; !ok {
+		return config.ErrInvalidOption
+	}
+
+	nativeValue, err := config.GetNativeValue(option, config.GlobalSettings[option], value)
+	if err != nil {
+		return err
+	}
+
+	return SetGlobalOptionNative(option, nativeValue)
+}
+
+// ResetCmd resets a setting to its default value
+func (h *BufPane) ResetCmd(args []string) {
+	if len(args) < 1 {
+		InfoBar.Error("Not enough arguments")
+		return
+	}
+
+	option := args[0]
+
+	defaultGlobals := config.DefaultGlobalSettings()
+	defaultLocals := config.DefaultCommonSettings()
+
+	if _, ok := defaultGlobals[option]; ok {
+		SetGlobalOptionNative(option, defaultGlobals[option])
+		return
+	}
+	if _, ok := defaultLocals[option]; ok {
+		h.Buf.SetOptionNative(option, defaultLocals[option])
+		return
+	}
+	InfoBar.Error(config.ErrInvalidOption)
+}
+
+// SetCmd sets an option
+func (h *BufPane) SetCmd(args []string) {
+	if len(args) < 2 {
+		InfoBar.Error("Not enough arguments")
+		return
+	}
+
+	option := args[0]
+	value := args[1]
+
+	err := SetGlobalOption(option, value)
+	if err == config.ErrInvalidOption {
+		err := h.Buf.SetOption(option, value)
+		if err != nil {
+			InfoBar.Error(err)
+		}
+	} else if err != nil {
+		InfoBar.Error(err)
+	}
+}
+
+// SetLocalCmd sets an option local to the buffer
+func (h *BufPane) SetLocalCmd(args []string) {
+	if len(args) < 2 {
+		InfoBar.Error("Not enough arguments")
+		return
+	}
+
+	option := args[0]
+	value := args[1]
+
+	err := h.Buf.SetOption(option, value)
+	if err != nil {
+		InfoBar.Error(err)
+	}
+}
+
+// ShowCmd shows the value of the given option
+func (h *BufPane) ShowCmd(args []string) {
+	if len(args) < 1 {
+		InfoBar.Error("Please provide an option to show")
+		return
+	}
+
+	var option interface{}
+	if opt, ok := h.Buf.Settings[args[0]]; ok {
+		option = opt
+	} else if opt, ok := config.GlobalSettings[args[0]]; ok {
+		option = opt
+	}
+
+	if option == nil {
+		InfoBar.Error(args[0], " is not a valid option")
+		return
+	}
+
+	InfoBar.Message(option)
+}
+
+// ShowKeyCmd displays the action that a key is bound to
+func (h *BufPane) ShowKeyCmd(args []string) {
+	if len(args) < 1 {
+		InfoBar.Error("Please provide a key to show")
+		return
+	}
+
+	if action, ok := config.Bindings[args[0]]; ok {
+		InfoBar.Message(action)
+	} else {
+		InfoBar.Message(args[0], " has no binding")
+	}
+}
+
+// BindCmd creates a new keybinding
+func (h *BufPane) BindCmd(args []string) {
+	if len(args) < 2 {
+		InfoBar.Error("Not enough arguments")
+		return
+	}
+
+	_, err := TryBindKey(args[0], args[1], true)
+	if err != nil {
+		InfoBar.Error(err)
+	}
+}
+
+// UnbindCmd binds a key to its default action
+func (h *BufPane) UnbindCmd(args []string) {
+	if len(args) < 1 {
+		InfoBar.Error("Not enough arguments")
+		return
+	}
+
+	err := UnbindKey(args[0])
+	if err != nil {
+		InfoBar.Error(err)
+	}
+}
+
+// RunCmd runs a shell command in the background
+func (h *BufPane) RunCmd(args []string) {
+	runf, err := shell.RunBackgroundShell(shellquote.Join(args...))
+	if err != nil {
+		InfoBar.Error(err)
+	} else {
+		go func() {
+			InfoBar.Message(runf())
+			screen.Redraw()
+		}()
+	}
+}
+
+// QuitCmd closes the main view
+func (h *BufPane) QuitCmd(args []string) {
+	h.Quit()
+}
+
+// GotoCmd is a command that will send the cursor to a certain
+// position in the buffer
+// For example: `goto line`, or `goto line:col`
+func (h *BufPane) GotoCmd(args []string) {
+	if len(args) <= 0 {
+		InfoBar.Error("Not enough arguments")
+	} else {
+		h.RemoveAllMultiCursors()
+		if strings.Contains(args[0], ":") {
+			parts := strings.SplitN(args[0], ":", 2)
+			line, err := strconv.Atoi(parts[0])
+			if err != nil {
+				InfoBar.Error(err)
+				return
+			}
+			col, err := strconv.Atoi(parts[1])
+			if err != nil {
+				InfoBar.Error(err)
+				return
+			}
+			line = util.Clamp(line-1, 0, h.Buf.LinesNum()-1)
+			col = util.Clamp(col-1, 0, utf8.RuneCount(h.Buf.LineBytes(line)))
+			h.Cursor.GotoLoc(buffer.Loc{col, line})
+		} else {
+			line, err := strconv.Atoi(args[0])
+			if err != nil {
+				InfoBar.Error(err)
+				return
+			}
+			line = util.Clamp(line-1, 0, h.Buf.LinesNum()-1)
+			h.Cursor.GotoLoc(buffer.Loc{0, line})
+		}
+		h.Relocate()
+	}
+}
+
+// SaveCmd saves the buffer optionally with an argument file name
+func (h *BufPane) SaveCmd(args []string) {
+	if len(args) == 0 {
+		h.Save()
+	} else {
+		h.Buf.SaveAs(args[0])
+	}
+}
+
+// ReplaceCmd runs search and replace
+func (h *BufPane) ReplaceCmd(args []string) {
+	if len(args) < 2 || len(args) > 4 {
+		// We need to find both a search and replace expression
+		InfoBar.Error("Invalid replace statement: " + strings.Join(args, " "))
+		return
+	}
+
+	all := false
+	noRegex := false
+
+	foundSearch := false
+	foundReplace := false
+	var search string
+	var replaceStr string
+	for _, arg := range args {
+		switch arg {
+		case "-a":
+			all = true
+		case "-l":
+			noRegex = true
+		default:
+			if !foundSearch {
+				foundSearch = true
+				search = arg
+			} else if !foundReplace {
+				foundReplace = true
+				replaceStr = arg
+			} else {
+				InfoBar.Error("Invalid flag: " + arg)
+				return
+			}
+		}
+	}
+
+	if noRegex {
+		search = regexp.QuoteMeta(search)
+	}
+
+	replace := []byte(replaceStr)
+
+	var regex *regexp.Regexp
+	var err error
+	if h.Buf.Settings["ignorecase"].(bool) {
+		regex, err = regexp.Compile("(?im)" + search)
+	} else {
+		regex, err = regexp.Compile("(?m)" + search)
+	}
+	if err != nil {
+		// There was an error with the user's regex
+		InfoBar.Error(err)
+		return
+	}
+
+	nreplaced := 0
+	start := h.Buf.Start()
+	// end := h.Buf.End()
+	// if h.Cursor.HasSelection() {
+	// 	start = h.Cursor.CurSelection[0]
+	// 	end = h.Cursor.CurSelection[1]
+	// }
+	if all {
+		nreplaced = h.Buf.ReplaceRegex(start, h.Buf.End(), regex, replace)
+	} else {
+		inRange := func(l buffer.Loc) bool {
+			return l.GreaterEqual(start) && l.LessEqual(h.Buf.End())
+		}
+
+		searchLoc := start
+		searching := true
+		var doReplacement func()
+		doReplacement = func() {
+			locs, found, err := h.Buf.FindNext(search, start, h.Buf.End(), searchLoc, true, !noRegex)
+			if err != nil {
+				InfoBar.Error(err)
+				return
+			}
+			if !found || !inRange(locs[0]) || !inRange(locs[1]) {
+				h.Cursor.ResetSelection()
+				h.Buf.RelocateCursors()
+				return
+			}
+
+			h.Cursor.SetSelectionStart(locs[0])
+			h.Cursor.SetSelectionEnd(locs[1])
+
+			InfoBar.YNPrompt("Perform replacement (y,n,esc)", func(yes, canceled bool) {
+				if !canceled && yes {
+					h.Buf.Replace(locs[0], locs[1], replaceStr)
+
+					searchLoc = locs[0]
+					searchLoc.X += utf8.RuneCount(replace)
+					h.Cursor.Loc = searchLoc
+					nreplaced++
+				} else if !canceled && !yes {
+					searchLoc = locs[0]
+					searchLoc.X += utf8.RuneCount(replace)
+				} else if canceled {
+					h.Cursor.ResetSelection()
+					h.Buf.RelocateCursors()
+					return
+				}
+				if searching {
+					doReplacement()
+				}
+			})
+		}
+		doReplacement()
+	}
+
+	h.Buf.RelocateCursors()
+
+	if nreplaced > 1 {
+		InfoBar.Message("Replaced ", nreplaced, " occurrences of ", search)
+	} else if nreplaced == 1 {
+		InfoBar.Message("Replaced ", nreplaced, " occurrence of ", search)
+	} else {
+		InfoBar.Message("Nothing matched ", search)
+	}
+}
+
+// ReplaceAllCmd replaces search term all at once
+func (h *BufPane) ReplaceAllCmd(args []string) {
+	// aliased to Replace command
+	h.ReplaceCmd(append(args, "-a"))
+}
+
+// TermCmd opens a terminal in the current view
+func (h *BufPane) TermCmd(args []string) {
+	ps := h.tab.Panes
+
+	if len(args) == 0 {
+		sh := os.Getenv("SHELL")
+		if sh == "" {
+			InfoBar.Error("Shell environment not found")
+			return
+		}
+		args = []string{sh}
+	}
+
+	term := func(i int, newtab bool) {
+		t := new(shell.Terminal)
+		t.Start(args, false, true, nil, nil)
+
+		id := h.ID()
+		if newtab {
+			h.AddTab()
+			i = 0
+			id = MainTab().Panes[0].ID()
+		} else {
+			MainTab().Panes[i].Close()
+		}
+
+		v := h.GetView()
+		MainTab().Panes[i] = NewTermPane(v.X, v.Y, v.Width, v.Height, t, id, MainTab())
+		MainTab().SetActive(i)
+	}
+
+	// If there is only one open file we make a new tab instead of overwriting it
+	newtab := len(MainTab().Panes) == 1 && len(Tabs.List) == 1
+
+	if newtab {
+		term(0, true)
+		return
+	}
+
+	for i, p := range ps {
+		if p.ID() == h.ID() {
+			if h.Buf.Modified() {
+				InfoBar.YNPrompt("Save changes to "+h.Buf.GetName()+" before closing? (y,n,esc)", func(yes, canceled bool) {
+					if !canceled && !yes {
+						term(i, false)
+					} else if !canceled && yes {
+						h.Save()
+						term(i, false)
+					}
+				})
+			} else {
+				term(i, false)
+			}
+		}
+	}
+}
+
+// HandleCommand handles input from the user
+func (h *BufPane) HandleCommand(input string) {
+	args, err := shellquote.Split(input)
+	if err != nil {
+		InfoBar.Error("Error parsing args ", err)
+		return
+	}
+
+	if len(args) == 0 {
+		return
+	}
+
+	inputCmd := args[0]
+
+	if _, ok := commands[inputCmd]; !ok {
+		InfoBar.Error("Unknown command ", inputCmd)
+	} else {
+		WriteLog("> " + input + "\n")
+		commands[inputCmd].action(h, args[1:])
+		WriteLog("\n")
+	}
+}

internal/action/defaults_darwin.go

@@ -0,0 +1,107 @@
+package action
+
+// DefaultBindings returns a map containing micro's default keybindings
+func DefaultBindings() map[string]string {
+	return map[string]string{
+		"Up":             "CursorUp",
+		"Down":           "CursorDown",
+		"Right":          "CursorRight",
+		"Left":           "CursorLeft",
+		"ShiftUp":        "SelectUp",
+		"ShiftDown":      "SelectDown",
+		"ShiftLeft":      "SelectLeft",
+		"ShiftRight":     "SelectRight",
+		"AltLeft":        "WordLeft",
+		"AltRight":       "WordRight",
+		"AltUp":          "MoveLinesUp",
+		"AltDown":        "MoveLinesDown",
+		"AltShiftRight":  "SelectWordRight",
+		"AltShiftLeft":   "SelectWordLeft",
+		"CtrlLeft":       "StartOfText",
+		"CtrlRight":      "EndOfLine",
+		"CtrlShiftLeft":  "SelectToStartOfText",
+		"ShiftHome":      "SelectToStartOfText",
+		"CtrlShiftRight": "SelectToEndOfLine",
+		"ShiftEnd":       "SelectToEndOfLine",
+		"CtrlUp":         "CursorStart",
+		"CtrlDown":       "CursorEnd",
+		"CtrlShiftUp":    "SelectToStart",
+		"CtrlShiftDown":  "SelectToEnd",
+		"Alt-{":          "ParagraphPrevious",
+		"Alt-}":          "ParagraphNext",
+		"Enter":          "InsertNewline",
+		"CtrlH":          "Backspace",
+		"Backspace":      "Backspace",
+		"Alt-CtrlH":      "DeleteWordLeft",
+		"Alt-Backspace":  "DeleteWordLeft",
+		"Tab":            "Autocomplete|IndentSelection|InsertTab",
+		"Backtab":        "CycleAutocompleteBack|OutdentSelection|OutdentLine",
+		"CtrlO":          "OpenFile",
+		"CtrlS":          "Save",
+		"CtrlF":          "Find",
+		"CtrlN":          "FindNext",
+		"CtrlP":          "FindPrevious",
+		"CtrlZ":          "Undo",
+		"CtrlY":          "Redo",
+		"CtrlC":          "Copy",
+		"CtrlX":          "Cut",
+		"CtrlK":          "CutLine",
+		"CtrlD":          "DuplicateLine",
+		"CtrlV":          "Paste",
+		"CtrlA":          "SelectAll",
+		"CtrlT":          "AddTab",
+		"Alt,":           "PreviousTab",
+		"Alt.":           "NextTab",
+		"Home":           "StartOfText",
+		"End":            "EndOfLine",
+		"CtrlHome":       "CursorStart",
+		"CtrlEnd":        "CursorEnd",
+		"PageUp":         "CursorPageUp",
+		"PageDown":       "CursorPageDown",
+		"CtrlPageUp":     "PreviousTab",
+		"CtrlPageDown":   "NextTab",
+		"CtrlG":          "ToggleHelp",
+		"Alt-g":          "ToggleKeyMenu",
+		"CtrlR":          "ToggleRuler",
+		"CtrlL":          "command-edit:goto ",
+		"Delete":         "Delete",
+		"CtrlB":          "ShellMode",
+		"CtrlQ":          "Quit",
+		"CtrlE":          "CommandMode",
+		"CtrlW":          "NextSplit",
+		"CtrlU":          "ToggleMacro",
+		"CtrlJ":          "PlayMacro",
+		"Insert":         "ToggleOverwriteMode",
+
+		// Emacs-style keybindings
+		"Alt-f": "WordRight",
+		"Alt-b": "WordLeft",
+		"Alt-a": "StartOfText",
+		"Alt-e": "EndOfLine",
+		// "Alt-p": "CursorUp",
+		// "Alt-n": "CursorDown",
+
+		// Integration with file managers
+		"F2":  "Save",
+		"F3":  "Find",
+		"F4":  "Quit",
+		"F7":  "Find",
+		"F10": "Quit",
+		"Esc": "Escape",
+
+		// Mouse bindings
+		"MouseWheelUp":   "ScrollUp",
+		"MouseWheelDown": "ScrollDown",
+		"MouseLeft":      "MousePress",
+		"MouseMiddle":    "PastePrimary",
+		"Ctrl-MouseLeft": "MouseMultiCursor",
+
+		"Alt-n":        "SpawnMultiCursor",
+		"AltShiftUp":   "SpawnMultiCursorUp",
+		"AltShiftDown": "SpawnMultiCursorDown",
+		"Alt-m":        "SpawnMultiCursorSelect",
+		"Alt-p":        "RemoveMultiCursor",
+		"Alt-c":        "RemoveAllMultiCursors",
+		"Alt-x":        "SkipMultiCursor",
+	}
+}

internal/action/defaults_other.go

@@ -0,0 +1,109 @@
+// +build !darwin
+
+package action
+
+// DefaultBindings returns a map containing micro's default keybindings
+func DefaultBindings() map[string]string {
+	return map[string]string{
+		"Up":             "CursorUp",
+		"Down":           "CursorDown",
+		"Right":          "CursorRight",
+		"Left":           "CursorLeft",
+		"ShiftUp":        "SelectUp",
+		"ShiftDown":      "SelectDown",
+		"ShiftLeft":      "SelectLeft",
+		"ShiftRight":     "SelectRight",
+		"CtrlLeft":       "WordLeft",
+		"CtrlRight":      "WordRight",
+		"AltUp":          "MoveLinesUp",
+		"AltDown":        "MoveLinesDown",
+		"CtrlShiftRight": "SelectWordRight",
+		"CtrlShiftLeft":  "SelectWordLeft",
+		"AltLeft":        "StartOfText",
+		"AltRight":       "EndOfLine",
+		"AltShiftLeft":   "SelectToStartOfText",
+		"ShiftHome":      "SelectToStartOfText",
+		"AltShiftRight":  "SelectToEndOfLine",
+		"ShiftEnd":       "SelectToEndOfLine",
+		"CtrlUp":         "CursorStart",
+		"CtrlDown":       "CursorEnd",
+		"CtrlShiftUp":    "SelectToStart",
+		"CtrlShiftDown":  "SelectToEnd",
+		"Alt-{":          "ParagraphPrevious",
+		"Alt-}":          "ParagraphNext",
+		"Enter":          "InsertNewline",
+		"CtrlH":          "Backspace",
+		"Backspace":      "Backspace",
+		"Alt-CtrlH":      "DeleteWordLeft",
+		"Alt-Backspace":  "DeleteWordLeft",
+		"Tab":            "Autocomplete|IndentSelection|InsertTab",
+		"Backtab":        "CycleAutocompleteBack|OutdentSelection|OutdentLine",
+		"CtrlO":          "OpenFile",
+		"CtrlS":          "Save",
+		"CtrlF":          "Find",
+		"CtrlN":          "FindNext",
+		"CtrlP":          "FindPrevious",
+		"CtrlZ":          "Undo",
+		"CtrlY":          "Redo",
+		"CtrlC":          "Copy",
+		"CtrlX":          "Cut",
+		"CtrlK":          "CutLine",
+		"CtrlD":          "DuplicateLine",
+		"CtrlV":          "Paste",
+		"CtrlA":          "SelectAll",
+		"CtrlT":          "AddTab",
+		"Alt,":           "PreviousTab",
+		"Alt.":           "NextTab",
+		"Home":           "StartOfText",
+		"End":            "EndOfLine",
+		"CtrlHome":       "CursorStart",
+		"CtrlEnd":        "CursorEnd",
+		"PageUp":         "CursorPageUp",
+		"PageDown":       "CursorPageDown",
+		"CtrlPageUp":     "PreviousTab",
+		"CtrlPageDown":   "NextTab",
+		"CtrlG":          "ToggleHelp",
+		"Alt-g":          "ToggleKeyMenu",
+		"CtrlR":          "ToggleRuler",
+		"CtrlL":          "command-edit:goto ",
+		"Delete":         "Delete",
+		"CtrlB":          "ShellMode",
+		"CtrlQ":          "Quit",
+		"CtrlE":          "CommandMode",
+		"CtrlW":          "NextSplit",
+		"CtrlU":          "ToggleMacro",
+		"CtrlJ":          "PlayMacro",
+		"Insert":         "ToggleOverwriteMode",
+
+		// Emacs-style keybindings
+		"Alt-f": "WordRight",
+		"Alt-b": "WordLeft",
+		"Alt-a": "StartOfText",
+		"Alt-e": "EndOfLine",
+		// "Alt-p": "CursorUp",
+		// "Alt-n": "CursorDown",
+
+		// Integration with file managers
+		"F2":  "Save",
+		"F3":  "Find",
+		"F4":  "Quit",
+		"F7":  "Find",
+		"F10": "Quit",
+		"Esc": "Escape",
+
+		// Mouse bindings
+		"MouseWheelUp":   "ScrollUp",
+		"MouseWheelDown": "ScrollDown",
+		"MouseLeft":      "MousePress",
+		"MouseMiddle":    "PastePrimary",
+		"Ctrl-MouseLeft": "MouseMultiCursor",
+
+		"Alt-n":        "SpawnMultiCursor",
+		"Alt-m":        "SpawnMultiCursorSelect",
+		"AltShiftUp":   "SpawnMultiCursorUp",
+		"AltShiftDown": "SpawnMultiCursorDown",
+		"Alt-p":        "RemoveMultiCursor",
+		"Alt-c":        "RemoveAllMultiCursors",
+		"Alt-x":        "SkipMultiCursor",
+	}
+}

internal/action/events.go

@@ -0,0 +1,42 @@
+package action
+
+import (
+	"github.com/zyedidia/tcell"
+)
+
+type Event interface{}
+
+// RawEvent is simply an escape code
+// We allow users to directly bind escape codes
+// to get around some of a limitations of terminals
+type RawEvent struct {
+	esc string
+}
+
+// KeyEvent is a key event containing a key code,
+// some possible modifiers (alt, ctrl, etc...) and
+// a rune if it was simply a character press
+// Note: to be compatible with tcell events,
+// for ctrl keys r=code
+type KeyEvent struct {
+	code tcell.Key
+	mod  tcell.ModMask
+	r    rune
+}
+
+// MouseEvent is a mouse event with a mouse button and
+// any possible key modifiers
+type MouseEvent struct {
+	btn tcell.ButtonMask
+	mod tcell.ModMask
+}
+
+type KeyAction func(Handler) bool
+type MouseAction func(Handler, tcell.EventMouse) bool
+
+// A Handler will take a tcell event and execute it
+// appropriately
+type Handler interface {
+	HandleEvent(tcell.Event)
+	HandleCommand(string)
+}

internal/action/globals.go

@@ -0,0 +1,42 @@
+package action
+
+import "github.com/zyedidia/micro/internal/buffer"
+
+var InfoBar *InfoPane
+var LogBufPane *BufPane
+
+func InitGlobals() {
+	InfoBar = NewInfoBar()
+	buffer.LogBuf = buffer.NewBufferFromString("", "Log", buffer.BTLog)
+}
+
+func GetInfoBar() *InfoPane {
+	return InfoBar
+}
+
+func WriteLog(s string) {
+	buffer.WriteLog(s)
+	if LogBufPane != nil {
+		LogBufPane.CursorEnd()
+		v := LogBufPane.GetView()
+		endY := buffer.LogBuf.End().Y
+
+		if endY > v.StartLine+v.Height {
+			v.StartLine = buffer.LogBuf.End().Y - v.Height + 2
+			LogBufPane.SetView(v)
+		}
+	}
+}
+
+func OpenLogBuf(h *BufPane) {
+	LogBufPane = h.HSplitBuf(buffer.LogBuf)
+	LogBufPane.CursorEnd()
+
+	v := LogBufPane.GetView()
+	endY := buffer.LogBuf.End().Y
+
+	if endY > v.StartLine+v.Height {
+		v.StartLine = buffer.LogBuf.End().Y - v.Height + 2
+		LogBufPane.SetView(v)
+	}
+}

internal/action/infocomplete.go

@@ -0,0 +1,280 @@
+package action
+
+import (
+	"bytes"
+	"sort"
+	"strings"
+
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/util"
+)
+
+// This file is meant (for now) for autocompletion in command mode, not
+// while coding. This helps micro autocomplete commands and then filenames
+// for example with `vsplit filename`.
+
+// CommandComplete autocompletes commands
+func CommandComplete(b *buffer.Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	input, argstart := buffer.GetArg(b)
+
+	var suggestions []string
+	for cmd := range commands {
+		if strings.HasPrefix(cmd, input) {
+			suggestions = append(suggestions, cmd)
+		}
+	}
+
+	sort.Strings(suggestions)
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+
+	return completions, suggestions
+}
+
+// HelpComplete autocompletes help topics
+func HelpComplete(b *buffer.Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	input, argstart := buffer.GetArg(b)
+
+	var suggestions []string
+
+	for _, file := range config.ListRuntimeFiles(config.RTHelp) {
+		topic := file.Name()
+		if strings.HasPrefix(topic, input) {
+			suggestions = append(suggestions, topic)
+		}
+	}
+
+	sort.Strings(suggestions)
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+	return completions, suggestions
+}
+
+// colorschemeComplete tab-completes names of colorschemes.
+// This is just a heper value for OptionValueComplete
+func colorschemeComplete(input string) (string, []string) {
+	var suggestions []string
+	files := config.ListRuntimeFiles(config.RTColorscheme)
+
+	for _, f := range files {
+		if strings.HasPrefix(f.Name(), input) {
+			suggestions = append(suggestions, f.Name())
+		}
+	}
+
+	var chosen string
+	if len(suggestions) == 1 {
+		chosen = suggestions[0]
+	}
+
+	return chosen, suggestions
+}
+
+func contains(s []string, e string) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}
+
+// OptionComplete autocompletes options
+func OptionComplete(b *buffer.Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	input, argstart := buffer.GetArg(b)
+
+	var suggestions []string
+	for option := range config.GlobalSettings {
+		if strings.HasPrefix(option, input) {
+			suggestions = append(suggestions, option)
+		}
+	}
+	// for option := range localSettings {
+	// 	if strings.HasPrefix(option, input) && !contains(suggestions, option) {
+	// 		suggestions = append(suggestions, option)
+	// 	}
+	// }
+
+	sort.Strings(suggestions)
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+	return completions, suggestions
+}
+
+// OptionValueComplete completes values for various options
+func OptionValueComplete(b *buffer.Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	l := b.LineBytes(c.Y)
+	l = util.SliceStart(l, c.X)
+	input, argstart := buffer.GetArg(b)
+
+	completeValue := false
+	args := bytes.Split(l, []byte{' '})
+	if len(args) >= 2 {
+		// localSettings := config.DefaultLocalSettings()
+		for option := range config.GlobalSettings {
+			if option == string(args[len(args)-2]) {
+				completeValue = true
+				break
+			}
+		}
+		// for option := range localSettings {
+		// 	if option == string(args[len(args)-2]) {
+		// 		completeValue = true
+		// 		break
+		// 	}
+		// }
+	}
+	if !completeValue {
+		return OptionComplete(b)
+	}
+
+	inputOpt := string(args[len(args)-2])
+
+	inputOpt = strings.TrimSpace(inputOpt)
+	var suggestions []string
+	// localSettings := config.DefaultLocalSettings()
+	var optionVal interface{}
+	for k, option := range config.GlobalSettings {
+		if k == inputOpt {
+			optionVal = option
+		}
+	}
+	// for k, option := range localSettings {
+	// 	if k == inputOpt {
+	// 		optionVal = option
+	// 	}
+	// }
+
+	switch optionVal.(type) {
+	case bool:
+		if strings.HasPrefix("on", input) {
+			suggestions = append(suggestions, "on")
+		} else if strings.HasPrefix("true", input) {
+			suggestions = append(suggestions, "true")
+		}
+		if strings.HasPrefix("off", input) {
+			suggestions = append(suggestions, "off")
+		} else if strings.HasPrefix("false", input) {
+			suggestions = append(suggestions, "false")
+		}
+	case string:
+		switch inputOpt {
+		case "colorscheme":
+			_, suggestions = colorschemeComplete(input)
+		case "fileformat":
+			if strings.HasPrefix("unix", input) {
+				suggestions = append(suggestions, "unix")
+			}
+			if strings.HasPrefix("dos", input) {
+				suggestions = append(suggestions, "dos")
+			}
+		case "sucmd":
+			if strings.HasPrefix("sudo", input) {
+				suggestions = append(suggestions, "sudo")
+			}
+			if strings.HasPrefix("doas", input) {
+				suggestions = append(suggestions, "doas")
+			}
+		}
+	}
+	sort.Strings(suggestions)
+
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+	return completions, suggestions
+}
+
+// PluginCmdComplete autocompletes the plugin command
+func PluginCmdComplete(b *buffer.Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	input, argstart := buffer.GetArg(b)
+
+	var suggestions []string
+	for _, cmd := range PluginCmds {
+		if strings.HasPrefix(cmd, input) {
+			suggestions = append(suggestions, cmd)
+		}
+	}
+
+	sort.Strings(suggestions)
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+	return completions, suggestions
+}
+
+// PluginComplete completes values for the plugin command
+func PluginComplete(b *buffer.Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	l := b.LineBytes(c.Y)
+	l = util.SliceStart(l, c.X)
+	input, argstart := buffer.GetArg(b)
+
+	completeValue := false
+	args := bytes.Split(l, []byte{' '})
+	if len(args) >= 2 {
+		for _, cmd := range PluginCmds {
+			if cmd == string(args[len(args)-2]) {
+				completeValue = true
+				break
+			}
+		}
+	}
+	if !completeValue {
+		return PluginCmdComplete(b)
+	}
+
+	var suggestions []string
+	for _, pl := range config.Plugins {
+		if strings.HasPrefix(pl.Name, input) {
+			suggestions = append(suggestions, pl.Name)
+		}
+	}
+	sort.Strings(suggestions)
+
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+	return completions, suggestions
+}
+
+// PluginNameComplete completes with the names of loaded plugins
+// func PluginNameComplete(b *buffer.Buffer) ([]string, []string) {
+// 	c := b.GetActiveCursor()
+// 	input, argstart := buffer.GetArg(b)
+//
+// 	var suggestions []string
+// 	for _, pp := range config.GetAllPluginPackages(nil) {
+// 		if strings.HasPrefix(pp.Name, input) {
+// 			suggestions = append(suggestions, pp.Name)
+// 		}
+// 	}
+//
+// 	sort.Strings(suggestions)
+// 	completions := make([]string, len(suggestions))
+// 	for i := range suggestions {
+// 		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+// 	}
+// 	return completions, suggestions
+// }
+
+// // MakeCompletion registers a function from a plugin for autocomplete commands
+// func MakeCompletion(function string) Completion {
+// 	pluginCompletions = append(pluginCompletions, LuaFunctionComplete(function))
+// 	return Completion(-len(pluginCompletions))
+// }

internal/action/infopane.go

@@ -0,0 +1,219 @@
+package action
+
+import (
+	"bytes"
+	"strings"
+
+	"github.com/zyedidia/micro/internal/display"
+	"github.com/zyedidia/micro/internal/info"
+	"github.com/zyedidia/micro/internal/util"
+	"github.com/zyedidia/tcell"
+)
+
+type InfoKeyAction func(*InfoPane)
+
+type InfoPane struct {
+	*BufPane
+	*info.InfoBuf
+}
+
+func NewInfoPane(ib *info.InfoBuf, w display.BWindow, tab *Tab) *InfoPane {
+	ip := new(InfoPane)
+	ip.InfoBuf = ib
+	ip.BufPane = NewBufPane(ib.Buffer, w, tab)
+
+	return ip
+}
+
+func NewInfoBar() *InfoPane {
+	ib := info.NewBuffer()
+	w := display.NewInfoWindow(ib)
+	return NewInfoPane(ib, w, nil)
+}
+
+func (h *InfoPane) Close() {
+	h.InfoBuf.Close()
+	h.BufPane.Close()
+}
+
+func (h *InfoPane) HandleEvent(event tcell.Event) {
+	switch e := event.(type) {
+	case *tcell.EventKey:
+		ke := KeyEvent{
+			code: e.Key(),
+			mod:  e.Modifiers(),
+			r:    e.Rune(),
+		}
+
+		done := h.DoKeyEvent(ke)
+		hasYN := h.HasYN
+		if e.Key() == tcell.KeyRune && hasYN {
+			if e.Rune() == 'y' && hasYN {
+				h.YNResp = true
+				h.DonePrompt(false)
+			} else if e.Rune() == 'n' && hasYN {
+				h.YNResp = false
+				h.DonePrompt(false)
+			}
+		}
+		if e.Key() == tcell.KeyRune && !done && !hasYN {
+			h.DoRuneInsert(e.Rune())
+			done = true
+		}
+		if done && h.HasPrompt && !hasYN {
+			resp := string(h.LineBytes(0))
+			hist := h.History[h.PromptType]
+			hist[h.HistoryNum] = resp
+			if h.EventCallback != nil {
+				h.EventCallback(resp)
+			}
+		}
+	case *tcell.EventMouse:
+		h.BufPane.HandleEvent(event)
+	}
+}
+
+// DoKeyEvent executes a key event for the command bar, doing any overridden actions
+func (h *InfoPane) DoKeyEvent(e KeyEvent) bool {
+	done := false
+	if action, ok := BufKeyBindings[e]; ok {
+		estr := BufKeyStrings[e]
+		for _, s := range InfoNones {
+			if s == estr {
+				return false
+			}
+		}
+		for s, a := range InfoOverrides {
+			// TODO this is a hack and really we should have support
+			// for having binding overrides for different buffers
+			if strings.HasPrefix(estr, s) {
+				done = true
+				a(h)
+				break
+			}
+		}
+		if !done {
+			done = action(h.BufPane)
+		}
+	}
+	return done
+}
+
+// InfoNones is a list of actions that should have no effect when executed
+// by an infohandler
+var InfoNones = []string{
+	"Save",
+	"SaveAll",
+	"SaveAs",
+	"Find",
+	"FindNext",
+	"FindPrevious",
+	"Center",
+	"DuplicateLine",
+	"MoveLinesUp",
+	"MoveLinesDown",
+	"OpenFile",
+	"Start",
+	"End",
+	"PageUp",
+	"PageDown",
+	"SelectPageUp",
+	"SelectPageDown",
+	"HalfPageUp",
+	"HalfPageDown",
+	"ToggleHelp",
+	"ToggleKeyMenu",
+	"ToggleRuler",
+	"JumpLine",
+	"ClearStatus",
+	"ShellMode",
+	"CommandMode",
+	"AddTab",
+	"PreviousTab",
+	"NextTab",
+	"NextSplit",
+	"PreviousSplit",
+	"Unsplit",
+	"VSplit",
+	"HSplit",
+	"ToggleMacro",
+	"PlayMacro",
+	"Suspend",
+	"ScrollUp",
+	"ScrollDown",
+	"SpawnMultiCursor",
+	"SpawnMultiCursorSelect",
+	"RemoveMultiCursor",
+	"RemoveAllMultiCursors",
+	"SkipMultiCursor",
+}
+
+// InfoOverrides is the list of actions which have been overridden
+// by the infohandler
+var InfoOverrides = map[string]InfoKeyAction{
+	"CursorUp":      (*InfoPane).CursorUp,
+	"CursorDown":    (*InfoPane).CursorDown,
+	"InsertNewline": (*InfoPane).InsertNewline,
+	"Autocomplete":  (*InfoPane).Autocomplete,
+	"Escape":        (*InfoPane).Escape,
+	"Quit":          (*InfoPane).Quit,
+	"QuitAll":       (*InfoPane).QuitAll,
+}
+
+// CursorUp cycles history up
+func (h *InfoPane) CursorUp() {
+	h.UpHistory(h.History[h.PromptType])
+}
+
+// CursorDown cycles history down
+func (h *InfoPane) CursorDown() {
+	h.DownHistory(h.History[h.PromptType])
+}
+
+// Autocomplete begins autocompletion
+func (h *InfoPane) Autocomplete() {
+	b := h.Buf
+	if b.HasSuggestions {
+		b.CycleAutocomplete(true)
+		return
+	}
+
+	c := b.GetActiveCursor()
+	l := b.LineBytes(0)
+	l = util.SliceStart(l, c.X)
+
+	args := bytes.Split(l, []byte{' '})
+	cmd := string(args[0])
+
+	if len(args) == 1 {
+		b.Autocomplete(CommandComplete)
+	} else {
+		if action, ok := commands[cmd]; ok {
+			if action.completer != nil {
+				b.Autocomplete(action.completer)
+			}
+		}
+	}
+}
+
+// InsertNewline completes the prompt
+func (h *InfoPane) InsertNewline() {
+	if !h.HasYN {
+		h.DonePrompt(false)
+	}
+}
+
+// Quit cancels the prompt
+func (h *InfoPane) Quit() {
+	h.DonePrompt(true)
+}
+
+// QuitAll cancels the prompt
+func (h *InfoPane) QuitAll() {
+	h.DonePrompt(true)
+}
+
+// Escape cancels the prompt
+func (h *InfoPane) Escape() {
+	h.DonePrompt(true)
+}

internal/action/pane.go

@@ -0,0 +1,16 @@
+package action
+
+import (
+	"github.com/zyedidia/micro/internal/display"
+)
+
+type Pane interface {
+	Handler
+	display.Window
+	ID() uint64
+	SetID(i uint64)
+	Name() string
+	Close()
+	SetTab(t *Tab)
+	Tab() *Tab
+}

internal/action/rawpane.go

@@ -0,0 +1,40 @@
+package action
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/display"
+	"github.com/zyedidia/tcell"
+)
+
+type RawPane struct {
+	*BufPane
+}
+
+func NewRawPaneFromWin(b *buffer.Buffer, win display.BWindow, tab *Tab) *RawPane {
+	rh := new(RawPane)
+	rh.BufPane = NewBufPane(b, win, tab)
+
+	return rh
+}
+
+func NewRawPane(tab *Tab) *RawPane {
+	b := buffer.NewBufferFromString("", "", buffer.BTRaw)
+	w := display.NewBufWindow(0, 0, 0, 0, b)
+	return NewRawPaneFromWin(b, w, tab)
+}
+
+func (h *RawPane) HandleEvent(event tcell.Event) {
+	switch e := event.(type) {
+	case *tcell.EventKey:
+		if e.Key() == tcell.KeyCtrlQ {
+			h.Quit()
+		}
+	}
+
+	h.Buf.Insert(h.Cursor.Loc, reflect.TypeOf(event).String()[7:])
+	h.Buf.Insert(h.Cursor.Loc, fmt.Sprintf(": %q\n", event.EscSeq()))
+	h.Relocate()
+}

internal/action/tab.go

@@ -0,0 +1,293 @@
+package action
+
+import (
+	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/display"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/views"
+	"github.com/zyedidia/tcell"
+)
+
+// The TabList is a list of tabs and a window to display the tab bar
+// at the top of the screen
+type TabList struct {
+	*display.TabWindow
+	List []*Tab
+}
+
+// NewTabList creates a TabList from a list of buffers by creating a Tab
+// for each buffer
+func NewTabList(bufs []*buffer.Buffer) *TabList {
+	w, h := screen.Screen.Size()
+	iOffset := config.GetInfoBarOffset()
+	tl := new(TabList)
+	tl.List = make([]*Tab, len(bufs))
+	if len(bufs) > 1 {
+		for i, b := range bufs {
+			tl.List[i] = NewTabFromBuffer(0, 1, w, h-1-iOffset, b)
+		}
+	} else {
+		tl.List[0] = NewTabFromBuffer(0, 0, w, h-iOffset, bufs[0])
+	}
+	tl.TabWindow = display.NewTabWindow(w, 0)
+	tl.Names = make([]string, len(bufs))
+
+	return tl
+}
+
+// UpdateNames makes sure that the list of names the tab window has access to is
+// correct
+func (t *TabList) UpdateNames() {
+	t.Names = t.Names[:0]
+	for _, p := range t.List {
+		t.Names = append(t.Names, p.Panes[p.active].Name())
+	}
+}
+
+// AddTab adds a new tab to this TabList
+func (t *TabList) AddTab(p *Tab) {
+	t.List = append(t.List, p)
+	t.Resize()
+	t.UpdateNames()
+}
+
+// RemoveTab removes a tab with the given id from the TabList
+func (t *TabList) RemoveTab(id uint64) {
+	for i, p := range t.List {
+		if len(p.Panes) == 0 {
+			continue
+		}
+		if p.Panes[0].ID() == id {
+			copy(t.List[i:], t.List[i+1:])
+			t.List[len(t.List)-1] = nil
+			t.List = t.List[:len(t.List)-1]
+			if t.Active() >= len(t.List) {
+				t.SetActive(len(t.List) - 1)
+			}
+			t.Resize()
+			t.UpdateNames()
+			return
+		}
+	}
+}
+
+// Resize resizes all elements within the tab list
+// One thing to note is that when there is only 1 tab
+// the tab bar should not be drawn so resizing must take
+// that into account
+func (t *TabList) Resize() {
+	w, h := screen.Screen.Size()
+	iOffset := config.GetInfoBarOffset()
+	InfoBar.Resize(w, h-1)
+	if len(t.List) > 1 {
+		for _, p := range t.List {
+			p.Y = 1
+			p.Node.Resize(w, h-1-iOffset)
+			p.Resize()
+		}
+	} else if len(t.List) == 1 {
+		t.List[0].Y = 0
+		t.List[0].Node.Resize(w, h-iOffset)
+		t.List[0].Resize()
+	}
+	t.TabWindow.Resize(w, h)
+}
+
+// HandleEvent checks for a resize event or a mouse event on the tab bar
+// otherwise it will forward the event to the currently active tab
+func (t *TabList) HandleEvent(event tcell.Event) {
+	switch e := event.(type) {
+	case *tcell.EventResize:
+		t.Resize()
+	case *tcell.EventMouse:
+		mx, my := e.Position()
+		switch e.Buttons() {
+		case tcell.Button1:
+			if len(t.List) > 1 {
+				ind := t.LocFromVisual(buffer.Loc{mx, my})
+				if ind != -1 {
+					t.SetActive(ind)
+					return
+				}
+				if my == 0 {
+					return
+				}
+			}
+		case tcell.WheelUp:
+			if my == t.Y {
+				t.Scroll(4)
+				return
+			}
+		case tcell.WheelDown:
+			if my == t.Y {
+				t.Scroll(-4)
+				return
+			}
+		}
+	}
+	t.List[t.Active()].HandleEvent(event)
+}
+
+// Display updates the names and then displays the tab bar
+func (t *TabList) Display() {
+	t.UpdateNames()
+	if len(t.List) > 1 {
+		t.TabWindow.Display()
+	}
+}
+
+// Tabs is the global tab list
+var Tabs *TabList
+
+func InitTabs(bufs []*buffer.Buffer) {
+	Tabs = NewTabList(bufs)
+}
+
+func MainTab() *Tab {
+	return Tabs.List[Tabs.Active()]
+}
+
+// A Tab represents a single tab
+// It consists of a list of edit panes (the open buffers),
+// a split tree (stored as just the root node), and a uiwindow
+// to display the UI elements like the borders between splits
+type Tab struct {
+	*views.Node
+	*display.UIWindow
+	Panes  []Pane
+	active int
+
+	resizing *views.Node // node currently being resized
+}
+
+// NewTabFromBuffer creates a new tab from the given buffer
+func NewTabFromBuffer(x, y, width, height int, b *buffer.Buffer) *Tab {
+	t := new(Tab)
+	t.Node = views.NewRoot(x, y, width, height)
+	t.UIWindow = display.NewUIWindow(t.Node)
+
+	e := NewBufPaneFromBuf(b, t)
+	e.SetID(t.ID())
+
+	t.Panes = append(t.Panes, e)
+	return t
+}
+
+func NewTabFromPane(x, y, width, height int, pane Pane) *Tab {
+	t := new(Tab)
+	t.Node = views.NewRoot(x, y, width, height)
+	t.UIWindow = display.NewUIWindow(t.Node)
+	pane.SetTab(t)
+	pane.SetID(t.ID())
+
+	t.Panes = append(t.Panes, pane)
+	return t
+}
+
+// HandleEvent takes a tcell event and usually dispatches it to the current
+// active pane. However if the event is a resize or a mouse event where the user
+// is interacting with the UI (resizing splits) then the event is consumed here
+// If the event is a mouse event in a pane, that pane will become active and get
+// the event
+func (t *Tab) HandleEvent(event tcell.Event) {
+	switch e := event.(type) {
+	case *tcell.EventMouse:
+		mx, my := e.Position()
+		switch e.Buttons() {
+		case tcell.Button1:
+			if t.resizing != nil {
+				var size int
+				if t.resizing.Kind == views.STVert {
+					size = mx - t.resizing.X
+				} else {
+					size = my - t.resizing.Y + 1
+				}
+				t.resizing.ResizeSplit(size)
+				t.Resize()
+				return
+			}
+
+			resizeID := t.GetMouseSplitID(buffer.Loc{mx, my})
+			if resizeID != 0 {
+				t.resizing = t.GetNode(uint64(resizeID))
+				return
+			}
+
+			for i, p := range t.Panes {
+				v := p.GetView()
+				inpane := mx >= v.X && mx < v.X+v.Width && my >= v.Y && my < v.Y+v.Height
+				if inpane {
+					t.SetActive(i)
+					break
+				}
+			}
+		case tcell.ButtonNone:
+			t.resizing = nil
+		default:
+			for _, p := range t.Panes {
+				v := p.GetView()
+				inpane := mx >= v.X && mx < v.X+v.Width && my >= v.Y && my < v.Y+v.Height
+				if inpane {
+					p.HandleEvent(event)
+					return
+				}
+			}
+		}
+
+	}
+	t.Panes[t.active].HandleEvent(event)
+}
+
+// SetActive changes the currently active pane to the specified index
+func (t *Tab) SetActive(i int) {
+	t.active = i
+	for j, p := range t.Panes {
+		if j == i {
+			p.SetActive(true)
+		} else {
+			p.SetActive(false)
+		}
+	}
+}
+
+// GetPane returns the pane with the given split index
+func (t *Tab) GetPane(splitid uint64) int {
+	for i, p := range t.Panes {
+		if p.ID() == splitid {
+			return i
+		}
+	}
+	return 0
+}
+
+// Remove pane removes the pane with the given index
+func (t *Tab) RemovePane(i int) {
+	copy(t.Panes[i:], t.Panes[i+1:])
+	t.Panes[len(t.Panes)-1] = nil
+	t.Panes = t.Panes[:len(t.Panes)-1]
+}
+
+// Resize resizes all panes according to their corresponding split nodes
+func (t *Tab) Resize() {
+	for _, p := range t.Panes {
+		n := t.GetNode(p.ID())
+		pv := p.GetView()
+		offset := 0
+		if n.X != 0 {
+			offset = 1
+		}
+		pv.X, pv.Y = n.X+offset, n.Y
+		p.SetView(pv)
+		p.Resize(n.W-offset, n.H)
+	}
+}
+
+// CurPane returns the currently active pane
+func (t *Tab) CurPane() *BufPane {
+	p, ok := t.Panes[t.active].(*BufPane)
+	if !ok {
+		return nil
+	}
+	return p
+}

internal/action/terminal_supported.go

@@ -0,0 +1,37 @@
+// +build linux darwin dragonfly openbsd_amd64 freebsd
+
+package action
+
+import (
+	shellquote "github.com/kballard/go-shellquote"
+	"github.com/zyedidia/micro/internal/shell"
+)
+
+// TermEmuSupported is a constant that marks if the terminal emulator is supported
+const TermEmuSupported = true
+
+// RunTermEmulator starts a terminal emulator from a bufpane with the given input (command)
+// if wait is true it will wait for the user to exit by pressing enter once the executable has terminated
+// if getOutput is true it will redirect the stdout of the process to a pipe which will be passed to the
+// callback which is a function that takes a string and a list of optional user arguments
+func RunTermEmulator(h *BufPane, input string, wait bool, getOutput bool, callback func(out string, userargs []interface{}), userargs []interface{}) error {
+	args, err := shellquote.Split(input)
+	if err != nil {
+		return err
+	}
+	if len(args) == 0 {
+		return nil
+	}
+
+	t := new(shell.Terminal)
+	t.Start(args, getOutput, wait, callback, userargs)
+
+	h.AddTab()
+	id := MainTab().Panes[0].ID()
+
+	v := h.GetView()
+	MainTab().Panes[0] = NewTermPane(v.X, v.Y, v.Width, v.Height, t, id, MainTab())
+	MainTab().SetActive(0)
+
+	return nil
+}

internal/action/terminal_unsupported.go

@@ -0,0 +1,13 @@
+// +build !linux,!darwin,!freebsd,!dragonfly,!openbsd_amd64
+
+package action
+
+import "errors"
+
+// TermEmuSupported is a constant that marks if the terminal emulator is supported
+const TermEmuSupported = false
+
+// RunTermEmulator returns an error for unsupported systems (non-unix systems
+func RunTermEmulator(input string, wait bool, getOutput bool, callback func(out string, userargs []interface{}), userargs []interface{}) error {
+	return errors.New("Unsupported operating system")
+}

internal/action/termpane.go

@@ -0,0 +1,134 @@
+package action
+
+import (
+	"runtime"
+
+	"github.com/zyedidia/clipboard"
+	"github.com/zyedidia/micro/internal/display"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/shell"
+	"github.com/zyedidia/tcell"
+	"github.com/zyedidia/terminal"
+)
+
+type TermPane struct {
+	*shell.Terminal
+	display.Window
+
+	mouseReleased bool
+	id            uint64
+	tab           *Tab
+}
+
+func NewTermPane(x, y, w, h int, t *shell.Terminal, id uint64, tab *Tab) *TermPane {
+	th := new(TermPane)
+	th.Terminal = t
+	th.id = id
+	th.mouseReleased = true
+	th.Window = display.NewTermWindow(x, y, w, h, t)
+	th.tab = tab
+	return th
+}
+
+func (t *TermPane) ID() uint64 {
+	return t.id
+}
+
+func (t *TermPane) SetID(i uint64) {
+	t.id = i
+}
+
+func (t *TermPane) SetTab(tab *Tab) {
+	t.tab = tab
+}
+
+func (t *TermPane) Tab() *Tab {
+	return t.tab
+}
+
+func (t *TermPane) Close() {}
+
+func (t *TermPane) Quit() {
+	t.Close()
+	if len(MainTab().Panes) > 1 {
+		t.Unsplit()
+	} else if len(Tabs.List) > 1 {
+		Tabs.RemoveTab(t.id)
+	} else {
+		screen.Screen.Fini()
+		InfoBar.Close()
+		runtime.Goexit()
+	}
+}
+
+func (t *TermPane) Unsplit() {
+	n := MainTab().GetNode(t.id)
+	n.Unsplit()
+
+	MainTab().RemovePane(MainTab().GetPane(t.id))
+	MainTab().Resize()
+	MainTab().SetActive(len(MainTab().Panes) - 1)
+}
+
+// HandleEvent handles a tcell event by forwarding it to the terminal emulator
+// If the event is a mouse event and the program running in the emulator
+// does not have mouse support, the emulator will support selections and
+// copy-paste
+func (t *TermPane) HandleEvent(event tcell.Event) {
+	if e, ok := event.(*tcell.EventKey); ok {
+		if t.Status == shell.TTDone {
+			switch e.Key() {
+			case tcell.KeyEscape, tcell.KeyCtrlQ, tcell.KeyEnter:
+				t.Close()
+				t.Quit()
+			default:
+			}
+		}
+		if e.Key() == tcell.KeyCtrlC && t.HasSelection() {
+			clipboard.WriteAll(t.GetSelection(t.GetView().Width), "clipboard")
+			InfoBar.Message("Copied selection to clipboard")
+		} else if t.Status != shell.TTDone {
+			t.WriteString(event.EscSeq())
+		}
+	} else if _, ok := event.(*tcell.EventPaste); ok {
+		if t.Status != shell.TTDone {
+			t.WriteString(event.EscSeq())
+		}
+	} else if e, ok := event.(*tcell.EventMouse); e != nil && (!ok || t.State.Mode(terminal.ModeMouseMask)) {
+		// t.WriteString(event.EscSeq())
+	} else if e != nil {
+		x, y := e.Position()
+		v := t.GetView()
+		x -= v.X
+		y -= v.Y
+
+		if e.Buttons() == tcell.Button1 {
+			if !t.mouseReleased {
+				// drag
+				t.Selection[1].X = x
+				t.Selection[1].Y = y
+			} else {
+				t.Selection[0].X = x
+				t.Selection[0].Y = y
+				t.Selection[1].X = x
+				t.Selection[1].Y = y
+			}
+
+			t.mouseReleased = false
+		} else if e.Buttons() == tcell.ButtonNone {
+			if !t.mouseReleased {
+				t.Selection[1].X = x
+				t.Selection[1].Y = y
+			}
+			t.mouseReleased = true
+		}
+	}
+
+	if t.Status == shell.TTClose {
+		t.Quit()
+	}
+}
+
+func (t *TermPane) HandleCommand(input string) {
+	InfoBar.Error("Commands are unsupported in term for now")
+}

internal/buffer/autocomplete.go

@@ -0,0 +1,206 @@
+package buffer
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"sort"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/zyedidia/micro/internal/util"
+)
+
+// A Completer is a function that takes a buffer and returns info
+// describing what autocompletions should be inserted at the current
+// cursor location
+// It returns a list of string suggestions which will be inserted at
+// the current cursor location if selected as well as a list of
+// suggestion names which can be displayed in an autocomplete box or
+// other UI element
+type Completer func(*Buffer) ([]string, []string)
+
+func (b *Buffer) GetSuggestions() {
+
+}
+
+// Autocomplete starts the autocomplete process
+func (b *Buffer) Autocomplete(c Completer) bool {
+	b.Completions, b.Suggestions = c(b)
+	if len(b.Completions) != len(b.Suggestions) || len(b.Completions) == 0 {
+		return false
+	}
+	b.CurSuggestion = -1
+	b.CycleAutocomplete(true)
+	return true
+}
+
+// CycleAutocomplete moves to the next suggestion
+func (b *Buffer) CycleAutocomplete(forward bool) {
+	prevSuggestion := b.CurSuggestion
+
+	if forward {
+		b.CurSuggestion++
+	} else {
+		b.CurSuggestion--
+	}
+	if b.CurSuggestion >= len(b.Suggestions) {
+		b.CurSuggestion = 0
+	} else if b.CurSuggestion < 0 {
+		b.CurSuggestion = len(b.Suggestions) - 1
+	}
+
+	c := b.GetActiveCursor()
+	start := c.Loc
+	end := c.Loc
+	if prevSuggestion < len(b.Suggestions) && prevSuggestion >= 0 {
+		start = end.Move(-utf8.RuneCountInString(b.Completions[prevSuggestion]), b)
+	} else {
+		// end = start.Move(1, b)
+	}
+
+	b.Replace(start, end, b.Completions[b.CurSuggestion])
+	if len(b.Suggestions) > 1 {
+		b.HasSuggestions = true
+	}
+}
+
+// GetWord gets the most recent word separated by any separator
+// (whitespace, punctuation, any non alphanumeric character)
+func GetWord(b *Buffer) ([]byte, int) {
+	c := b.GetActiveCursor()
+	l := b.LineBytes(c.Y)
+	l = util.SliceStart(l, c.X)
+
+	if c.X == 0 || util.IsWhitespace(b.RuneAt(c.Loc)) {
+		return []byte{}, -1
+	}
+
+	if util.IsNonAlphaNumeric(b.RuneAt(c.Loc)) {
+		return []byte{}, c.X
+	}
+
+	args := bytes.FieldsFunc(l, util.IsNonAlphaNumeric)
+	input := args[len(args)-1]
+	return input, c.X - utf8.RuneCount(input)
+}
+
+// GetArg gets the most recent word (separated by ' ' only)
+func GetArg(b *Buffer) (string, int) {
+	c := b.GetActiveCursor()
+	l := b.LineBytes(c.Y)
+	l = util.SliceStart(l, c.X)
+
+	args := bytes.Split(l, []byte{' '})
+	input := string(args[len(args)-1])
+	argstart := 0
+	for i, a := range args {
+		if i == len(args)-1 {
+			break
+		}
+		argstart += utf8.RuneCount(a) + 1
+	}
+
+	return input, argstart
+}
+
+// FileComplete autocompletes filenames
+func FileComplete(b *Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	input, argstart := GetArg(b)
+
+	sep := string(os.PathSeparator)
+	dirs := strings.Split(input, sep)
+
+	var files []os.FileInfo
+	var err error
+	if len(dirs) > 1 {
+		directories := strings.Join(dirs[:len(dirs)-1], sep) + sep
+
+		directories, _ = util.ReplaceHome(directories)
+		files, err = ioutil.ReadDir(directories)
+	} else {
+		files, err = ioutil.ReadDir(".")
+	}
+
+	if err != nil {
+		return nil, nil
+	}
+
+	var suggestions []string
+	for _, f := range files {
+		name := f.Name()
+		if f.IsDir() {
+			name += sep
+		}
+		if strings.HasPrefix(name, dirs[len(dirs)-1]) {
+			suggestions = append(suggestions, name)
+		}
+	}
+
+	sort.Strings(suggestions)
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		var complete string
+		if len(dirs) > 1 {
+			complete = strings.Join(dirs[:len(dirs)-1], sep) + sep + suggestions[i]
+		} else {
+			complete = suggestions[i]
+		}
+		completions[i] = util.SliceEndStr(complete, c.X-argstart)
+	}
+
+	return completions, suggestions
+}
+
+// BufferComplete autocompletes based on previous words in the buffer
+func BufferComplete(b *Buffer) ([]string, []string) {
+	c := b.GetActiveCursor()
+	input, argstart := GetWord(b)
+
+	if argstart == -1 {
+		return []string{}, []string{}
+	}
+
+	inputLen := utf8.RuneCount(input)
+
+	suggestionsSet := make(map[string]struct{})
+
+	var suggestions []string
+	for i := c.Y; i >= 0; i-- {
+		l := b.LineBytes(i)
+		words := bytes.FieldsFunc(l, util.IsNonAlphaNumeric)
+		for _, w := range words {
+			if bytes.HasPrefix(w, input) && utf8.RuneCount(w) > inputLen {
+				strw := string(w)
+				if _, ok := suggestionsSet[strw]; !ok {
+					suggestionsSet[strw] = struct{}{}
+					suggestions = append(suggestions, strw)
+				}
+			}
+		}
+	}
+	for i := c.Y + 1; i < b.LinesNum(); i++ {
+		l := b.LineBytes(i)
+		words := bytes.FieldsFunc(l, util.IsNonAlphaNumeric)
+		for _, w := range words {
+			if bytes.HasPrefix(w, input) && utf8.RuneCount(w) > inputLen {
+				strw := string(w)
+				if _, ok := suggestionsSet[strw]; !ok {
+					suggestionsSet[strw] = struct{}{}
+					suggestions = append(suggestions, strw)
+				}
+			}
+		}
+	}
+	if len(suggestions) > 1 {
+		suggestions = append(suggestions, string(input))
+	}
+
+	completions := make([]string, len(suggestions))
+	for i := range suggestions {
+		completions[i] = util.SliceEndStr(suggestions[i], c.X-argstart)
+	}
+
+	return completions, suggestions
+}

internal/buffer/backup.go

@@ -0,0 +1,115 @@
+package buffer
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"time"
+
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/util"
+	"golang.org/x/text/encoding"
+)
+
+const backupMsg = `A backup was detected for this file. This likely means that micro
+crashed while editing this file, or another instance of micro is currently
+editing this file.
+
+The backup was created on %s, and the file is
+
+%s
+
+* 'recover' will apply the backup as unsaved changes to the current buffer.
+  When the buffer is closed, the backup will be removed.
+* 'ignore' will ignore the backup, discarding its changes. The backup file
+  will be removed.
+
+Options: [r]ecover, [i]gnore: `
+
+// Backup saves the current buffer to ConfigDir/backups
+func (b *Buffer) Backup(checkTime bool) error {
+	if !b.Settings["backup"].(bool) || b.Path == "" || b.Type != BTDefault {
+		return nil
+	}
+
+	if checkTime {
+		sub := time.Now().Sub(b.lastbackup)
+		if sub < time.Duration(backupTime)*time.Millisecond {
+			return nil
+		}
+	}
+
+	b.lastbackup = time.Now()
+
+	backupdir := config.ConfigDir + "/backups/"
+	if _, err := os.Stat(backupdir); os.IsNotExist(err) {
+		os.Mkdir(backupdir, os.ModePerm)
+	}
+
+	name := backupdir + util.EscapePath(b.AbsPath)
+
+	err := overwriteFile(name, encoding.Nop, func(file io.Writer) (e error) {
+		if len(b.lines) == 0 {
+			return
+		}
+
+		// end of line
+		eol := []byte{'\n'}
+
+		// write lines
+		if _, e = file.Write(b.lines[0].data); e != nil {
+			return
+		}
+
+		for _, l := range b.lines[1:] {
+			if _, e = file.Write(eol); e != nil {
+				return
+			}
+			if _, e = file.Write(l.data); e != nil {
+				return
+			}
+		}
+		return
+	}, false)
+
+	return err
+}
+
+// RemoveBackup removes any backup file associated with this buffer
+func (b *Buffer) RemoveBackup() {
+	if !b.Settings["backup"].(bool) || b.Path == "" || b.Type != BTDefault {
+		return
+	}
+	f := config.ConfigDir + "/backups/" + util.EscapePath(b.AbsPath)
+	os.Remove(f)
+}
+
+// ApplyBackup applies the corresponding backup file to this buffer (if one exists)
+// Returns true if a backup was applied
+func (b *Buffer) ApplyBackup(fsize int64) bool {
+	if b.Settings["backup"].(bool) && len(b.Path) > 0 && b.Type == BTDefault {
+		backupfile := config.ConfigDir + "/backups/" + util.EscapePath(b.AbsPath)
+		if info, err := os.Stat(backupfile); err == nil {
+			backup, err := os.Open(backupfile)
+			if err == nil {
+				defer backup.Close()
+				t := info.ModTime()
+				msg := fmt.Sprintf(backupMsg, t.Format("Mon Jan _2 at 15:04, 2006"), util.EscapePath(b.AbsPath))
+				choice := screen.TermPrompt(msg, []string{"r", "i", "recover", "ignore"}, true)
+
+				if choice%2 == 0 {
+					// recover
+					b.LineArray = NewLineArray(uint64(fsize), FFAuto, backup)
+					b.isModified = true
+					return true
+				} else if choice%2 == 1 {
+					// delete
+					os.Remove(backupfile)
+				}
+			}
+		}
+	}
+
+	return false
+}

internal/buffer/buffer.go

@@ -0,0 +1,943 @@
+package buffer
+
+import (
+	"bytes"
+	"crypto/md5"
+	"errors"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+	"unicode/utf8"
+
+	luar "layeh.com/gopher-luar"
+
+	"github.com/zyedidia/micro/internal/config"
+	ulua "github.com/zyedidia/micro/internal/lua"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/util"
+	"github.com/zyedidia/micro/pkg/highlight"
+	"golang.org/x/text/encoding/htmlindex"
+	"golang.org/x/text/encoding/unicode"
+	"golang.org/x/text/transform"
+)
+
+const backupTime = 8000
+
+var (
+	// OpenBuffers is a list of the currently open buffers
+	OpenBuffers []*Buffer
+	// LogBuf is a reference to the log buffer which can be opened with the
+	// `> log` command
+	LogBuf *Buffer
+)
+
+// The BufType defines what kind of buffer this is
+type BufType struct {
+	Kind     int
+	Readonly bool // The buffer cannot be edited
+	Scratch  bool // The buffer cannot be saved
+	Syntax   bool // Syntax highlighting is enabled
+}
+
+var (
+	// BTDefault is a default buffer
+	BTDefault = BufType{0, false, false, true}
+	// BTHelp is a help buffer
+	BTHelp = BufType{1, true, true, true}
+	// BTLog is a log buffer
+	BTLog = BufType{2, true, true, false}
+	// BTScratch is a buffer that cannot be saved (for scratch work)
+	BTScratch = BufType{3, false, true, false}
+	// BTRaw is is a buffer that shows raw terminal events
+	BTRaw = BufType{4, false, true, false}
+	// BTInfo is a buffer for inputting information
+	BTInfo = BufType{5, false, true, false}
+
+	// ErrFileTooLarge is returned when the file is too large to hash
+	// (fastdirty is automatically enabled)
+	ErrFileTooLarge = errors.New("File is too large to hash")
+)
+
+// SharedBuffer is a struct containing info that is shared among buffers
+// that have the same file open
+type SharedBuffer struct {
+	*LineArray
+	// Stores the last modification time of the file the buffer is pointing to
+	ModTime time.Time
+	// Type of the buffer (e.g. help, raw, scratch etc..)
+	Type BufType
+
+	isModified bool
+	// Whether or not suggestions can be autocompleted must be shared because
+	// it changes based on how the buffer has changed
+	HasSuggestions bool
+
+	// Modifications is the list of modified regions for syntax highlighting
+	Modifications []Loc
+}
+
+func (b *SharedBuffer) insert(pos Loc, value []byte) {
+	b.isModified = true
+	b.HasSuggestions = false
+	b.LineArray.insert(pos, value)
+
+	// b.Modifications is cleared every screen redraw so it's
+	// ok to append duplicates
+	b.Modifications = append(b.Modifications, Loc{pos.Y, pos.Y + bytes.Count(value, []byte{'\n'})})
+}
+func (b *SharedBuffer) remove(start, end Loc) []byte {
+	b.isModified = true
+	b.HasSuggestions = false
+	b.Modifications = append(b.Modifications, Loc{start.Y, start.Y})
+	return b.LineArray.remove(start, end)
+}
+
+// Buffer stores the main information about a currently open file including
+// the actual text (in a LineArray), the undo/redo stack (in an EventHandler)
+// all the cursors, the syntax highlighting info, the settings for the buffer
+// and some misc info about modification time and path location.
+// The syntax highlighting info must be stored with the buffer because the syntax
+// highlighter attaches information to each line of the buffer for optimization
+// purposes so it doesn't have to rehighlight everything on every update.
+type Buffer struct {
+	*EventHandler
+	*SharedBuffer
+
+	cursors     []*Cursor
+	curCursor   int
+	StartCursor Loc
+
+	// Path to the file on disk
+	Path string
+	// Absolute path to the file on disk
+	AbsPath string
+	// Name of the buffer on the status line
+	name string
+
+	// SyntaxDef represents the syntax highlighting definition being used
+	// This stores the highlighting rules and filetype detection info
+	SyntaxDef *highlight.Def
+	// The Highlighter struct actually performs the highlighting
+	Highlighter   *highlight.Highlighter
+	HighlightLock sync.Mutex
+
+	// Hash of the original buffer -- empty if fastdirty is on
+	origHash [md5.Size]byte
+
+	// Settings customized by the user
+	Settings map[string]interface{}
+
+	Suggestions   []string
+	Completions   []string
+	CurSuggestion int
+
+	Messages []*Message
+
+	// counts the number of edits
+	// resets every backupTime edits
+	lastbackup time.Time
+}
+
+// NewBufferFromFile opens a new buffer using the given path
+// It will also automatically handle `~`, and line/column with filename:l:c
+// It will return an empty buffer if the path does not exist
+// and an error if the file is a directory
+func NewBufferFromFile(path string, btype BufType) (*Buffer, error) {
+	var err error
+	filename, cursorPos := util.GetPathAndCursorPosition(path)
+	filename, err = util.ReplaceHome(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	file, err := os.Open(filename)
+	fileInfo, _ := os.Stat(filename)
+
+	if err == nil && fileInfo.IsDir() {
+		return nil, errors.New("Error: " + filename + " is a directory and cannot be opened")
+	}
+
+	defer file.Close()
+
+	cursorLoc, cursorerr := ParseCursorLocation(cursorPos)
+	if cursorerr != nil {
+		cursorLoc = Loc{-1, -1}
+	}
+
+	var buf *Buffer
+	if err != nil {
+		// File does not exist -- create an empty buffer with that name
+		buf = NewBufferFromString("", filename, btype)
+	} else {
+		buf = NewBuffer(file, util.FSize(file), filename, cursorLoc, btype)
+	}
+
+	return buf, nil
+}
+
+// NewBufferFromString creates a new buffer containing the given string
+func NewBufferFromString(text, path string, btype BufType) *Buffer {
+	return NewBuffer(strings.NewReader(text), int64(len(text)), path, Loc{-1, -1}, btype)
+}
+
+// NewBuffer creates a new buffer from a given reader with a given path
+// Ensure that ReadSettings and InitGlobalSettings have been called before creating
+// a new buffer
+// Places the cursor at startcursor. If startcursor is -1, -1 places the
+// cursor at an autodetected location (based on savecursor or :LINE:COL)
+func NewBuffer(r io.Reader, size int64, path string, startcursor Loc, btype BufType) *Buffer {
+	absPath, _ := filepath.Abs(path)
+
+	b := new(Buffer)
+
+	b.Settings = config.DefaultCommonSettings()
+	for k, v := range config.GlobalSettings {
+		if _, ok := b.Settings[k]; ok {
+			b.Settings[k] = v
+		}
+	}
+	config.InitLocalSettings(b.Settings, path)
+
+	enc, err := htmlindex.Get(b.Settings["encoding"].(string))
+	if err != nil {
+		enc = unicode.UTF8
+		b.Settings["encoding"] = "utf-8"
+	}
+
+	reader := transform.NewReader(r, enc.NewDecoder())
+
+	found := false
+	if len(path) > 0 {
+		for _, buf := range OpenBuffers {
+			if buf.AbsPath == absPath && buf.Type != BTInfo {
+				found = true
+				b.SharedBuffer = buf.SharedBuffer
+				b.EventHandler = buf.EventHandler
+			}
+		}
+	}
+
+	b.Path = path
+	b.AbsPath = absPath
+
+	if !found {
+		b.SharedBuffer = new(SharedBuffer)
+		b.Type = btype
+
+		hasBackup := b.ApplyBackup(size)
+
+		if !hasBackup {
+			b.LineArray = NewLineArray(uint64(size), FFAuto, reader)
+		}
+		b.EventHandler = NewEventHandler(b.SharedBuffer, b.cursors)
+	}
+
+	if b.Settings["readonly"].(bool) && b.Type == BTDefault {
+		b.Type.Readonly = true
+	}
+
+	// The last time this file was modified
+	b.UpdateModTime()
+
+	switch b.Endings {
+	case FFUnix:
+		b.Settings["fileformat"] = "unix"
+	case FFDos:
+		b.Settings["fileformat"] = "dos"
+	}
+
+	b.UpdateRules()
+	config.InitLocalSettings(b.Settings, b.Path)
+
+	if _, err := os.Stat(config.ConfigDir + "/buffers/"); os.IsNotExist(err) {
+		os.Mkdir(config.ConfigDir+"/buffers/", os.ModePerm)
+	}
+
+	if startcursor.X != -1 && startcursor.Y != -1 {
+		b.StartCursor = startcursor
+	} else {
+		if b.Settings["savecursor"].(bool) || b.Settings["saveundo"].(bool) {
+			err := b.Unserialize()
+			if err != nil {
+				screen.TermMessage(err)
+			}
+		}
+	}
+
+	b.AddCursor(NewCursor(b, b.StartCursor))
+	b.GetActiveCursor().Relocate()
+
+	if !b.Settings["fastdirty"].(bool) {
+		if size > LargeFileThreshold {
+			// If the file is larger than LargeFileThreshold fastdirty needs to be on
+			b.Settings["fastdirty"] = true
+		} else {
+			calcHash(b, &b.origHash)
+		}
+	}
+
+	err = config.RunPluginFn("onBufferOpen", luar.New(ulua.L, b))
+	if err != nil {
+		screen.TermMessage(err)
+	}
+
+	b.Modifications = make([]Loc, 0, 10)
+
+	OpenBuffers = append(OpenBuffers, b)
+
+	return b
+}
+
+// Close removes this buffer from the list of open buffers
+func (b *Buffer) Close() {
+	for i, buf := range OpenBuffers {
+		if b == buf {
+			b.Fini()
+			copy(OpenBuffers[i:], OpenBuffers[i+1:])
+			OpenBuffers[len(OpenBuffers)-1] = nil
+			OpenBuffers = OpenBuffers[:len(OpenBuffers)-1]
+			return
+		}
+	}
+}
+
+// Fini should be called when a buffer is closed and performs
+// some cleanup
+func (b *Buffer) Fini() {
+	if !b.Modified() {
+		b.Serialize()
+	}
+	b.RemoveBackup()
+}
+
+// GetName returns the name that should be displayed in the statusline
+// for this buffer
+func (b *Buffer) GetName() string {
+	if b.name == "" {
+		if b.Path == "" {
+			return "No name"
+		}
+		return b.Path
+	}
+	return b.name
+}
+
+//SetName changes the name for this buffer
+func (b *Buffer) SetName(s string) {
+	b.name = s
+}
+
+// Insert inserts the given string of text at the start location
+func (b *Buffer) Insert(start Loc, text string) {
+	if !b.Type.Readonly {
+		b.EventHandler.cursors = b.cursors
+		b.EventHandler.active = b.curCursor
+		b.EventHandler.Insert(start, text)
+
+		go b.Backup(true)
+	}
+}
+
+// Remove removes the characters between the start and end locations
+func (b *Buffer) Remove(start, end Loc) {
+	if !b.Type.Readonly {
+		b.EventHandler.cursors = b.cursors
+		b.EventHandler.active = b.curCursor
+		b.EventHandler.Remove(start, end)
+
+		go b.Backup(true)
+	}
+}
+
+// ClearModifications clears the list of modified lines in this buffer
+// The list of modified lines is used for syntax highlighting so that
+// we can selectively highlight only the necessary lines
+// This function should be called every time this buffer is drawn to
+// the screen
+func (b *Buffer) ClearModifications() {
+	// clear slice without resetting the cap
+	b.Modifications = b.Modifications[:0]
+}
+
+// FileType returns the buffer's filetype
+func (b *Buffer) FileType() string {
+	return b.Settings["filetype"].(string)
+}
+
+// ExternallyModified returns whether the file being edited has
+// been modified by some external process
+func (b *Buffer) ExternallyModified() bool {
+	modTime, err := util.GetModTime(b.Path)
+	if err == nil {
+		return modTime != b.ModTime
+	}
+	return false
+}
+
+// UpdateModTime updates the modtime of this file
+func (b *Buffer) UpdateModTime() (err error) {
+	b.ModTime, err = util.GetModTime(b.Path)
+	return
+}
+
+// ReOpen reloads the current buffer from disk
+func (b *Buffer) ReOpen() error {
+	file, err := os.Open(b.Path)
+	if err != nil {
+		return err
+	}
+
+	enc, err := htmlindex.Get(b.Settings["encoding"].(string))
+	if err != nil {
+		return err
+	}
+
+	reader := transform.NewReader(file, enc.NewDecoder())
+	data, err := ioutil.ReadAll(reader)
+	txt := string(data)
+
+	if err != nil {
+		return err
+	}
+	b.EventHandler.ApplyDiff(txt)
+
+	err = b.UpdateModTime()
+	b.isModified = false
+	b.RelocateCursors()
+	return err
+}
+
+// RelocateCursors relocates all cursors (makes sure they are in the buffer)
+func (b *Buffer) RelocateCursors() {
+	for _, c := range b.cursors {
+		c.Relocate()
+	}
+}
+
+// RuneAt returns the rune at a given location in the buffer
+func (b *Buffer) RuneAt(loc Loc) rune {
+	line := b.LineBytes(loc.Y)
+	if len(line) > 0 {
+		i := 0
+		for len(line) > 0 {
+			r, size := utf8.DecodeRune(line)
+			line = line[size:]
+			i++
+
+			if i == loc.X {
+				return r
+			}
+		}
+	}
+	return '\n'
+}
+
+// Modified returns if this buffer has been modified since
+// being opened
+func (b *Buffer) Modified() bool {
+	if b.Type.Scratch {
+		return false
+	}
+
+	if b.Settings["fastdirty"].(bool) {
+		return b.isModified
+	}
+
+	var buff [md5.Size]byte
+
+	calcHash(b, &buff)
+	return buff != b.origHash
+}
+
+// calcHash calculates md5 hash of all lines in the buffer
+func calcHash(b *Buffer, out *[md5.Size]byte) error {
+	h := md5.New()
+
+	size := 0
+	if len(b.lines) > 0 {
+		n, e := h.Write(b.lines[0].data)
+		if e != nil {
+			return e
+		}
+		size += n
+
+		for _, l := range b.lines[1:] {
+			n, e = h.Write([]byte{'\n'})
+			if e != nil {
+				return e
+			}
+			size += n
+			n, e = h.Write(l.data)
+			if e != nil {
+				return e
+			}
+			size += n
+		}
+	}
+
+	if size > LargeFileThreshold {
+		return ErrFileTooLarge
+	}
+
+	h.Sum((*out)[:0])
+	return nil
+}
+
+// UpdateRules updates the syntax rules and filetype for this buffer
+// This is called when the colorscheme changes
+func (b *Buffer) UpdateRules() {
+	if !b.Type.Syntax {
+		return
+	}
+	ft := b.Settings["filetype"].(string)
+	if ft == "off" {
+		return
+	}
+	syntaxFile := ""
+	var header *highlight.Header
+	for _, f := range config.ListRuntimeFiles(config.RTSyntaxHeader) {
+		data, err := f.Data()
+		if err != nil {
+			screen.TermMessage("Error loading syntax header file " + f.Name() + ": " + err.Error())
+			continue
+		}
+
+		header, err = highlight.MakeHeader(data)
+		if err != nil {
+			screen.TermMessage("Error reading syntax header file", f.Name(), err)
+			continue
+		}
+
+		if ft == "unknown" || ft == "" {
+			if highlight.MatchFiletype(header.FtDetect, b.Path, b.lines[0].data) {
+				syntaxFile = f.Name()
+				break
+			}
+		} else if header.FileType == ft {
+			syntaxFile = f.Name()
+			break
+		}
+	}
+
+	if syntaxFile == "" {
+		// search for the syntax file in the user's custom syntax files
+		for _, f := range config.ListRealRuntimeFiles(config.RTSyntax) {
+			log.Println("real runtime file", f.Name())
+			data, err := f.Data()
+			if err != nil {
+				screen.TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
+				continue
+			}
+
+			header, err = highlight.MakeHeaderYaml(data)
+			file, err := highlight.ParseFile(data)
+			if err != nil {
+				screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+				continue
+			}
+
+			if ((ft == "unknown" || ft == "") && highlight.MatchFiletype(header.FtDetect, b.Path, b.lines[0].data)) || header.FileType == ft {
+				syndef, err := highlight.ParseDef(file, header)
+				if err != nil {
+					screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+					continue
+				}
+				b.SyntaxDef = syndef
+				break
+			}
+		}
+	} else {
+		for _, f := range config.ListRuntimeFiles(config.RTSyntax) {
+			if f.Name() == syntaxFile {
+				data, err := f.Data()
+				if err != nil {
+					screen.TermMessage("Error loading syntax file " + f.Name() + ": " + err.Error())
+					continue
+				}
+
+				file, err := highlight.ParseFile(data)
+				if err != nil {
+					screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+					continue
+				}
+
+				syndef, err := highlight.ParseDef(file, header)
+				if err != nil {
+					screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+					continue
+				}
+				b.SyntaxDef = syndef
+				break
+			}
+		}
+	}
+
+	if b.SyntaxDef != nil && highlight.HasIncludes(b.SyntaxDef) {
+		includes := highlight.GetIncludes(b.SyntaxDef)
+
+		var files []*highlight.File
+		for _, f := range config.ListRuntimeFiles(config.RTSyntax) {
+			data, err := f.Data()
+			if err != nil {
+				screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+				continue
+			}
+			header, err := highlight.MakeHeaderYaml(data)
+			if err != nil {
+				screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+				continue
+			}
+
+			for _, i := range includes {
+				if header.FileType == i {
+					file, err := highlight.ParseFile(data)
+					if err != nil {
+						screen.TermMessage("Error parsing syntax file " + f.Name() + ": " + err.Error())
+						continue
+					}
+					files = append(files, file)
+					break
+				}
+			}
+			if len(files) >= len(includes) {
+				break
+			}
+		}
+
+		highlight.ResolveIncludes(b.SyntaxDef, files)
+	}
+
+	if b.Highlighter == nil || syntaxFile != "" {
+		if b.SyntaxDef != nil {
+			b.Settings["filetype"] = b.SyntaxDef.FileType
+		}
+	} else {
+		b.SyntaxDef = &highlight.EmptyDef
+	}
+
+	if b.SyntaxDef != nil {
+		b.Highlighter = highlight.NewHighlighter(b.SyntaxDef)
+		if b.Settings["syntax"].(bool) {
+			go func() {
+				b.Highlighter.HighlightStates(b)
+				b.Highlighter.HighlightMatches(b, 0, b.End().Y)
+				screen.DrawChan <- true
+			}()
+		}
+	}
+}
+
+// ClearMatches clears all of the syntax highlighting for the buffer
+func (b *Buffer) ClearMatches() {
+	for i := range b.lines {
+		b.SetMatch(i, nil)
+		b.SetState(i, nil)
+	}
+}
+
+// IndentString returns this buffer's indent method (a tabstop or n spaces
+// depending on the settings)
+func (b *Buffer) IndentString(tabsize int) string {
+	if b.Settings["tabstospaces"].(bool) {
+		return util.Spaces(tabsize)
+	}
+	return "\t"
+}
+
+// SetCursors resets this buffer's cursors to a new list
+func (b *Buffer) SetCursors(c []*Cursor) {
+	b.cursors = c
+	b.EventHandler.cursors = b.cursors
+	b.EventHandler.active = b.curCursor
+}
+
+// AddCursor adds a new cursor to the list
+func (b *Buffer) AddCursor(c *Cursor) {
+	b.cursors = append(b.cursors, c)
+	b.EventHandler.cursors = b.cursors
+	b.EventHandler.active = b.curCursor
+	b.UpdateCursors()
+}
+
+// SetCurCursor sets the current cursor
+func (b *Buffer) SetCurCursor(n int) {
+	b.curCursor = n
+}
+
+// GetActiveCursor returns the main cursor in this buffer
+func (b *Buffer) GetActiveCursor() *Cursor {
+	return b.cursors[b.curCursor]
+}
+
+// GetCursor returns the nth cursor
+func (b *Buffer) GetCursor(n int) *Cursor {
+	return b.cursors[n]
+}
+
+// GetCursors returns the list of cursors in this buffer
+func (b *Buffer) GetCursors() []*Cursor {
+	return b.cursors
+}
+
+// NumCursors returns the number of cursors
+func (b *Buffer) NumCursors() int {
+	return len(b.cursors)
+}
+
+// MergeCursors merges any cursors that are at the same position
+// into one cursor
+func (b *Buffer) MergeCursors() {
+	var cursors []*Cursor
+	for i := 0; i < len(b.cursors); i++ {
+		c1 := b.cursors[i]
+		if c1 != nil {
+			for j := 0; j < len(b.cursors); j++ {
+				c2 := b.cursors[j]
+				if c2 != nil && i != j && c1.Loc == c2.Loc {
+					b.cursors[j] = nil
+				}
+			}
+			cursors = append(cursors, c1)
+		}
+	}
+
+	b.cursors = cursors
+
+	for i := range b.cursors {
+		b.cursors[i].Num = i
+	}
+
+	if b.curCursor >= len(b.cursors) {
+		b.curCursor = len(b.cursors) - 1
+	}
+	b.EventHandler.cursors = b.cursors
+	b.EventHandler.active = b.curCursor
+}
+
+// UpdateCursors updates all the cursors indicies
+func (b *Buffer) UpdateCursors() {
+	b.EventHandler.cursors = b.cursors
+	b.EventHandler.active = b.curCursor
+	for i, c := range b.cursors {
+		c.Num = i
+	}
+}
+
+func (b *Buffer) RemoveCursor(i int) {
+	copy(b.cursors[i:], b.cursors[i+1:])
+	b.cursors[len(b.cursors)-1] = nil
+	b.cursors = b.cursors[:len(b.cursors)-1]
+	b.curCursor = util.Clamp(b.curCursor, 0, len(b.cursors)-1)
+	b.UpdateCursors()
+}
+
+// ClearCursors removes all extra cursors
+func (b *Buffer) ClearCursors() {
+	for i := 1; i < len(b.cursors); i++ {
+		b.cursors[i] = nil
+	}
+	b.cursors = b.cursors[:1]
+	b.UpdateCursors()
+	b.curCursor = 0
+	b.GetActiveCursor().ResetSelection()
+}
+
+// MoveLinesUp moves the range of lines up one row
+func (b *Buffer) MoveLinesUp(start int, end int) {
+	if start < 1 || start >= end || end > len(b.lines) {
+		return
+	}
+	l := string(b.LineBytes(start - 1))
+	if end == len(b.lines) {
+		b.Insert(
+			Loc{
+				utf8.RuneCount(b.lines[end-1].data),
+				end - 1,
+			},
+			"\n"+l,
+		)
+	} else {
+		b.Insert(
+			Loc{0, end},
+			l+"\n",
+		)
+	}
+	b.Remove(
+		Loc{0, start - 1},
+		Loc{0, start},
+	)
+}
+
+// MoveLinesDown moves the range of lines down one row
+func (b *Buffer) MoveLinesDown(start int, end int) {
+	if start < 0 || start >= end || end >= len(b.lines)-1 {
+		return
+	}
+	l := string(b.LineBytes(end))
+	b.Insert(
+		Loc{0, start},
+		l+"\n",
+	)
+	end++
+	b.Remove(
+		Loc{0, end},
+		Loc{0, end + 1},
+	)
+}
+
+var BracePairs = [][2]rune{
+	{'(', ')'},
+	{'{', '}'},
+	{'[', ']'},
+}
+
+// FindMatchingBrace returns the location in the buffer of the matching bracket
+// It is given a brace type containing the open and closing character, (for example
+// '{' and '}') as well as the location to match from
+// TODO: maybe can be more efficient with utf8 package
+// returns the location of the matching brace
+// if the boolean returned is true then the original matching brace is one character left
+// of the starting location
+func (b *Buffer) FindMatchingBrace(braceType [2]rune, start Loc) (Loc, bool) {
+	curLine := []rune(string(b.LineBytes(start.Y)))
+	startChar := ' '
+	if start.X >= 0 && start.X < len(curLine) {
+		startChar = curLine[start.X]
+	}
+	leftChar := ' '
+	if start.X-1 >= 0 && start.X-1 < len(curLine) {
+		leftChar = curLine[start.X-1]
+	}
+	var i int
+	if startChar == braceType[0] || leftChar == braceType[0] {
+		for y := start.Y; y < b.LinesNum(); y++ {
+			l := []rune(string(b.LineBytes(y)))
+			xInit := 0
+			if y == start.Y {
+				if startChar == braceType[0] {
+					xInit = start.X
+				} else {
+					xInit = start.X - 1
+				}
+			}
+			for x := xInit; x < len(l); x++ {
+				r := l[x]
+				if r == braceType[0] {
+					i++
+				} else if r == braceType[1] {
+					i--
+					if i == 0 {
+						if startChar == braceType[0] {
+							return Loc{x, y}, false
+						}
+						return Loc{x, y}, true
+					}
+				}
+			}
+		}
+	} else if startChar == braceType[1] || leftChar == braceType[1] {
+		for y := start.Y; y >= 0; y-- {
+			l := []rune(string(b.lines[y].data))
+			xInit := len(l) - 1
+			if y == start.Y {
+				if leftChar == braceType[1] {
+					xInit = start.X - 1
+				} else {
+					xInit = start.X
+				}
+			}
+			for x := xInit; x >= 0; x-- {
+				r := l[x]
+				if r == braceType[0] {
+					i--
+					if i == 0 {
+						if leftChar == braceType[1] {
+							return Loc{x, y}, true
+						}
+						return Loc{x, y}, false
+					}
+				} else if r == braceType[1] {
+					i++
+				}
+			}
+		}
+	}
+	return start, true
+}
+
+// Retab changes all tabs to spaces or vice versa
+func (b *Buffer) Retab() {
+	toSpaces := b.Settings["tabstospaces"].(bool)
+	tabsize := util.IntOpt(b.Settings["tabsize"])
+	dirty := false
+
+	for i := 0; i < b.LinesNum(); i++ {
+		l := b.LineBytes(i)
+
+		ws := util.GetLeadingWhitespace(l)
+		if len(ws) != 0 {
+			if toSpaces {
+				ws = bytes.Replace(ws, []byte{'\t'}, bytes.Repeat([]byte{' '}, tabsize), -1)
+			} else {
+				ws = bytes.Replace(ws, bytes.Repeat([]byte{' '}, tabsize), []byte{'\t'}, -1)
+			}
+		}
+
+		l = bytes.TrimLeft(l, " \t")
+		b.lines[i].data = append(ws, l...)
+		dirty = true
+	}
+
+	b.isModified = dirty
+}
+
+// ParseCursorLocation turns a cursor location like 10:5 (LINE:COL)
+// into a loc
+func ParseCursorLocation(cursorPositions []string) (Loc, error) {
+	startpos := Loc{0, 0}
+	var err error
+
+	// if no positions are available exit early
+	if cursorPositions == nil {
+		return startpos, errors.New("No cursor positions were provided.")
+	}
+
+	startpos.Y, err = strconv.Atoi(cursorPositions[0])
+	startpos.Y--
+	if err == nil {
+		if len(cursorPositions) > 1 {
+			startpos.X, err = strconv.Atoi(cursorPositions[1])
+			if startpos.X > 0 {
+				startpos.X--
+			}
+		}
+	}
+
+	return startpos, err
+}
+
+// Line returns the string representation of the given line number
+func (b *Buffer) Line(i int) string {
+	return string(b.LineBytes(i))
+}
+
+func (b *Buffer) Write(bytes []byte) (n int, err error) {
+	b.EventHandler.InsertBytes(b.End(), bytes)
+	return len(bytes), nil
+}
+
+// WriteLog writes a string to the log buffer
+func WriteLog(s string) {
+	LogBuf.EventHandler.Insert(LogBuf.End(), s)
+}
+
+// GetLogBuf returns the log buffer
+func GetLogBuf() *Buffer {
+	return LogBuf
+}

internal/buffer/cursor.go

@@ -1,15 +1,23 @@
-package main
+package buffer
 
 import (
+	"unicode/utf8"
+
 	"github.com/zyedidia/clipboard"
+	"github.com/zyedidia/micro/internal/util"
 )
 
-// The Cursor struct stores the location of the cursor in the view
-// The complicated part about the cursor is storing its location.
-// The cursor must be displayed at an x, y location, but since the buffer
-// uses a rope to store text, to insert text we must have an index. It
-// is also simpler to use character indicies for other tasks such as
-// selection.
+// InBounds returns whether the given location is a valid character position in the given buffer
+func InBounds(pos Loc, buf *Buffer) bool {
+	if pos.Y < 0 || pos.Y >= len(buf.lines) || pos.X < 0 || pos.X > utf8.RuneCount(buf.LineBytes(pos.Y)) {
+		return false
+	}
+
+	return true
+}
+
+// The Cursor struct stores the location of the cursor in the buffer
+// as well as the selection
 type Cursor struct {
 	buf *Buffer
 	Loc
@@ -28,6 +36,23 @@ type Cursor struct {
 	Num int
 }
 
+func NewCursor(b *Buffer, l Loc) *Cursor {
+	c := &Cursor{
+		buf: b,
+		Loc: l,
+	}
+	c.StoreVisualX()
+	return c
+}
+
+func (c *Cursor) SetBuf(b *Buffer) {
+	c.buf = b
+}
+
+func (c *Cursor) Buf() *Buffer {
+	return c.buf
+}
+
 // Goto puts the cursor at the given cursor's location and gives
 // the current cursor its selection too
 func (c *Cursor) Goto(b Cursor) {
@@ -39,6 +64,54 @@ func (c *Cursor) Goto(b Cursor) {
 // the current cursor its selection too
 func (c *Cursor) GotoLoc(l Loc) {
 	c.X, c.Y = l.X, l.Y
+	c.StoreVisualX()
+}
+
+// GetVisualX returns the x value of the cursor in visual spaces
+func (c *Cursor) GetVisualX() int {
+	if c.X <= 0 {
+		c.X = 0
+		return 0
+	}
+
+	bytes := c.buf.LineBytes(c.Y)
+	tabsize := int(c.buf.Settings["tabsize"].(float64))
+	if c.X > utf8.RuneCount(bytes) {
+		c.X = utf8.RuneCount(bytes) - 1
+	}
+
+	return util.StringWidth(bytes, c.X, tabsize)
+}
+
+// GetCharPosInLine gets the char position of a visual x y
+// coordinate (this is necessary because tabs are 1 char but
+// 4 visual spaces)
+func (c *Cursor) GetCharPosInLine(b []byte, visualPos int) int {
+	tabsize := int(c.buf.Settings["tabsize"].(float64))
+	return util.GetCharPosInLine(b, visualPos, tabsize)
+}
+
+// Start moves the cursor to the start of the line it is on
+func (c *Cursor) Start() {
+	c.X = 0
+	c.LastVisualX = c.GetVisualX()
+}
+
+// StartOfText moves the cursor to the first non-whitespace rune of
+// the line it is on
+func (c *Cursor) StartOfText() {
+	c.Start()
+	for util.IsWhitespace(c.RuneUnder(c.X)) {
+		if c.X == utf8.RuneCount(c.buf.LineBytes(c.Y)) {
+			break
+		}
+		c.Right()
+	}
+}
+
+// End moves the cursor to the end of the line it is on
+func (c *Cursor) End() {
+	c.X = utf8.RuneCount(c.buf.LineBytes(c.Y))
 	c.LastVisualX = c.GetVisualX()
 }
 
@@ -47,7 +120,7 @@ func (c *Cursor) GotoLoc(l Loc) {
 func (c *Cursor) CopySelection(target string) {
 	if c.HasSelection() {
 		if target != "primary" || c.buf.Settings["useprimary"].(bool) {
-			clipboard.WriteAll(c.GetSelection(), target)
+			clipboard.WriteAll(string(c.GetSelection()), target)
 		}
 	}
 }
@@ -86,15 +159,30 @@ func (c *Cursor) DeleteSelection() {
 	}
 }
 
+// Deselect closes the cursor's current selection
+// Start indicates whether the cursor should be placed
+// at the start or end of the selection
+func (c *Cursor) Deselect(start bool) {
+	if c.HasSelection() {
+		if start {
+			c.Loc = c.CurSelection[0]
+		} else {
+			c.Loc = c.CurSelection[1].Move(-1, c.buf)
+		}
+		c.ResetSelection()
+		c.StoreVisualX()
+	}
+}
+
 // GetSelection returns the cursor's selection
-func (c *Cursor) GetSelection() string {
+func (c *Cursor) GetSelection() []byte {
 	if InBounds(c.CurSelection[0], c.buf) && InBounds(c.CurSelection[1], c.buf) {
 		if c.CurSelection[0].GreaterThan(c.CurSelection[1]) {
 			return c.buf.Substr(c.CurSelection[1], c.CurSelection[0])
 		}
 		return c.buf.Substr(c.CurSelection[0], c.CurSelection[1])
 	}
-	return ""
+	return []byte{}
 }
 
 // SelectLine selects the current line
@@ -102,7 +190,7 @@ func (c *Cursor) SelectLine() {
 	c.Start()
 	c.SetSelectionStart(c.Loc)
 	c.End()
-	if c.buf.NumLines-1 > c.Y {
+	if len(c.buf.lines)-1 > c.Y {
 		c.SetSelectionEnd(c.Loc.Move(1, c.buf))
 	} else {
 		c.SetSelectionEnd(c.Loc)
@@ -129,148 +217,20 @@ func (c *Cursor) AddLineToSelection() {
 	}
 }
 
-// SelectWord selects the word the cursor is currently on
-func (c *Cursor) SelectWord() {
-	if len(c.buf.Line(c.Y)) == 0 {
-		return
-	}
-
-	if !IsWordChar(string(c.RuneUnder(c.X))) {
-		c.SetSelectionStart(c.Loc)
-		c.SetSelectionEnd(c.Loc.Move(1, c.buf))
-		c.OrigSelection = c.CurSelection
-		return
-	}
-
-	forward, backward := c.X, c.X
-
-	for backward > 0 && IsWordChar(string(c.RuneUnder(backward-1))) {
-		backward--
-	}
-
-	c.SetSelectionStart(Loc{backward, c.Y})
-	c.OrigSelection[0] = c.CurSelection[0]
-
-	for forward < Count(c.buf.Line(c.Y))-1 && IsWordChar(string(c.RuneUnder(forward+1))) {
-		forward++
-	}
-
-	c.SetSelectionEnd(Loc{forward, c.Y}.Move(1, c.buf))
-	c.OrigSelection[1] = c.CurSelection[1]
-	c.Loc = c.CurSelection[1]
-}
-
-// AddWordToSelection adds the word the cursor is currently on
-// to the selection
-func (c *Cursor) AddWordToSelection() {
-	if c.Loc.GreaterThan(c.OrigSelection[0]) && c.Loc.LessThan(c.OrigSelection[1]) {
-		c.CurSelection = c.OrigSelection
-		return
-	}
-
-	if c.Loc.LessThan(c.OrigSelection[0]) {
-		backward := c.X
-
-		for backward > 0 && IsWordChar(string(c.RuneUnder(backward-1))) {
-			backward--
-		}
-
-		c.SetSelectionStart(Loc{backward, c.Y})
-		c.SetSelectionEnd(c.OrigSelection[1])
-	}
-
-	if c.Loc.GreaterThan(c.OrigSelection[1]) {
-		forward := c.X
-
-		for forward < Count(c.buf.Line(c.Y))-1 && IsWordChar(string(c.RuneUnder(forward+1))) {
-			forward++
-		}
-
-		c.SetSelectionEnd(Loc{forward, c.Y}.Move(1, c.buf))
-		c.SetSelectionStart(c.OrigSelection[0])
-	}
-
-	c.Loc = c.CurSelection[1]
-}
-
-// SelectTo selects from the current cursor location to the given
-// location
-func (c *Cursor) SelectTo(loc Loc) {
-	if loc.GreaterThan(c.OrigSelection[0]) {
-		c.SetSelectionStart(c.OrigSelection[0])
-		c.SetSelectionEnd(loc)
-	} else {
-		c.SetSelectionStart(loc)
-		c.SetSelectionEnd(c.OrigSelection[0])
-	}
-}
-
-// WordRight moves the cursor one word to the right
-func (c *Cursor) WordRight() {
-	for IsWhitespace(c.RuneUnder(c.X)) {
-		if c.X == Count(c.buf.Line(c.Y)) {
-			c.Right()
-			return
-		}
-		c.Right()
-	}
-	c.Right()
-	for IsWordChar(string(c.RuneUnder(c.X))) {
-		if c.X == Count(c.buf.Line(c.Y)) {
-			return
-		}
-		c.Right()
-	}
-}
-
-// WordLeft moves the cursor one word to the left
-func (c *Cursor) WordLeft() {
-	c.Left()
-	for IsWhitespace(c.RuneUnder(c.X)) {
-		if c.X == 0 {
-			return
-		}
-		c.Left()
-	}
-	c.Left()
-	for IsWordChar(string(c.RuneUnder(c.X))) {
-		if c.X == 0 {
-			return
-		}
-		c.Left()
-	}
-	c.Right()
-}
-
-// RuneUnder returns the rune under the given x position
-func (c *Cursor) RuneUnder(x int) rune {
-	line := []rune(c.buf.Line(c.Y))
-	if len(line) == 0 {
-		return '\n'
-	}
-	if x >= len(line) {
-		return '\n'
-	} else if x < 0 {
-		x = 0
-	}
-	return line[x]
-}
-
 // UpN moves the cursor up N lines (if possible)
 func (c *Cursor) UpN(amount int) {
 	proposedY := c.Y - amount
 	if proposedY < 0 {
 		proposedY = 0
-		c.LastVisualX = 0
-	} else if proposedY >= c.buf.NumLines {
-		proposedY = c.buf.NumLines - 1
+	} else if proposedY >= len(c.buf.lines) {
+		proposedY = len(c.buf.lines) - 1
 	}
 
-	runes := []rune(c.buf.Line(c.Y))
-	c.X = c.GetCharPosInLine(proposedY, c.LastVisualX)
+	bytes := c.buf.LineBytes(proposedY)
+	c.X = c.GetCharPosInLine(bytes, c.LastVisualX)
 
-	if c.X > len(runes) || (amount < 0 && proposedY == c.Y) {
-		c.X = len(runes)
+	if c.X > utf8.RuneCount(bytes) || (amount < 0 && proposedY == c.Y) {
+		c.X = utf8.RuneCount(bytes)
 	}
 
 	c.Y = proposedY
@@ -303,7 +263,7 @@ func (c *Cursor) Left() {
 		c.Up()
 		c.End()
 	}
-	c.LastVisualX = c.GetVisualX()
+	c.StoreVisualX()
 }
 
 // Right moves the cursor right one cell (if possible) or
@@ -312,62 +272,13 @@ func (c *Cursor) Right() {
 	if c.Loc == c.buf.End() {
 		return
 	}
-	if c.X < Count(c.buf.Line(c.Y)) {
+	if c.X < utf8.RuneCount(c.buf.LineBytes(c.Y)) {
 		c.X++
 	} else {
 		c.Down()
 		c.Start()
 	}
-	c.LastVisualX = c.GetVisualX()
-}
-
-// End moves the cursor to the end of the line it is on
-func (c *Cursor) End() {
-	c.X = Count(c.buf.Line(c.Y))
-	c.LastVisualX = c.GetVisualX()
-}
-
-// Start moves the cursor to the start of the line it is on
-func (c *Cursor) Start() {
-	c.X = 0
-	c.LastVisualX = c.GetVisualX()
-}
-
-// GetCharPosInLine gets the char position of a visual x y
-// coordinate (this is necessary because tabs are 1 char but
-// 4 visual spaces)
-func (c *Cursor) GetCharPosInLine(lineNum, visualPos int) int {
-	// Get the tab size
-	tabSize := int(c.buf.Settings["tabsize"].(float64))
-	visualLineLen := StringWidth(c.buf.Line(lineNum), tabSize)
-	if visualPos > visualLineLen {
-		visualPos = visualLineLen
-	}
-	width := WidthOfLargeRunes(c.buf.Line(lineNum), tabSize)
-	if visualPos >= width {
-		return visualPos - width
-	}
-	return visualPos / tabSize
-}
-
-// GetVisualX returns the x value of the cursor in visual spaces
-func (c *Cursor) GetVisualX() int {
-	runes := []rune(c.buf.Line(c.Y))
-	tabSize := int(c.buf.Settings["tabsize"].(float64))
-	if c.X > len(runes) {
-		c.X = len(runes) - 1
-	}
-
-	if c.X < 0 {
-		c.X = 0
-	}
-
-	return StringWidth(string(runes[:c.X]), tabSize)
-}
-
-// StoreVisualX stores the current visual x value in the cursor
-func (c *Cursor) StoreVisualX() {
-	c.LastVisualX = c.GetVisualX()
+	c.StoreVisualX()
 }
 
 // Relocate makes sure that the cursor is inside the bounds
@@ -376,13 +287,154 @@ func (c *Cursor) StoreVisualX() {
 func (c *Cursor) Relocate() {
 	if c.Y < 0 {
 		c.Y = 0
-	} else if c.Y >= c.buf.NumLines {
-		c.Y = c.buf.NumLines - 1
+	} else if c.Y >= len(c.buf.lines) {
+		c.Y = len(c.buf.lines) - 1
 	}
 
 	if c.X < 0 {
 		c.X = 0
-	} else if c.X > Count(c.buf.Line(c.Y)) {
-		c.X = Count(c.buf.Line(c.Y))
+	} else if c.X > utf8.RuneCount(c.buf.LineBytes(c.Y)) {
+		c.X = utf8.RuneCount(c.buf.LineBytes(c.Y))
 	}
 }
+
+// SelectWord selects the word the cursor is currently on
+func (c *Cursor) SelectWord() {
+	if len(c.buf.LineBytes(c.Y)) == 0 {
+		return
+	}
+
+	if !util.IsWordChar(c.RuneUnder(c.X)) {
+		c.SetSelectionStart(c.Loc)
+		c.SetSelectionEnd(c.Loc.Move(1, c.buf))
+		c.OrigSelection = c.CurSelection
+		return
+	}
+
+	forward, backward := c.X, c.X
+
+	for backward > 0 && util.IsWordChar(c.RuneUnder(backward-1)) {
+		backward--
+	}
+
+	c.SetSelectionStart(Loc{backward, c.Y})
+	c.OrigSelection[0] = c.CurSelection[0]
+
+	lineLen := utf8.RuneCount(c.buf.LineBytes(c.Y)) - 1
+	for forward < lineLen && util.IsWordChar(c.RuneUnder(forward+1)) {
+		forward++
+	}
+
+	c.SetSelectionEnd(Loc{forward, c.Y}.Move(1, c.buf))
+	c.OrigSelection[1] = c.CurSelection[1]
+	c.Loc = c.CurSelection[1]
+}
+
+// AddWordToSelection adds the word the cursor is currently on
+// to the selection
+func (c *Cursor) AddWordToSelection() {
+	if c.Loc.GreaterThan(c.OrigSelection[0]) && c.Loc.LessThan(c.OrigSelection[1]) {
+		c.CurSelection = c.OrigSelection
+		return
+	}
+
+	if c.Loc.LessThan(c.OrigSelection[0]) {
+		backward := c.X
+
+		for backward > 0 && util.IsWordChar(c.RuneUnder(backward-1)) {
+			backward--
+		}
+
+		c.SetSelectionStart(Loc{backward, c.Y})
+		c.SetSelectionEnd(c.OrigSelection[1])
+	}
+
+	if c.Loc.GreaterThan(c.OrigSelection[1]) {
+		forward := c.X
+
+		lineLen := utf8.RuneCount(c.buf.LineBytes(c.Y)) - 1
+		for forward < lineLen && util.IsWordChar(c.RuneUnder(forward+1)) {
+			forward++
+		}
+
+		c.SetSelectionEnd(Loc{forward, c.Y}.Move(1, c.buf))
+		c.SetSelectionStart(c.OrigSelection[0])
+	}
+
+	c.Loc = c.CurSelection[1]
+}
+
+// SelectTo selects from the current cursor location to the given
+// location
+func (c *Cursor) SelectTo(loc Loc) {
+	if loc.GreaterThan(c.OrigSelection[0]) {
+		c.SetSelectionStart(c.OrigSelection[0])
+		c.SetSelectionEnd(loc)
+	} else {
+		c.SetSelectionStart(loc)
+		c.SetSelectionEnd(c.OrigSelection[0])
+	}
+}
+
+// WordRight moves the cursor one word to the right
+func (c *Cursor) WordRight() {
+	for util.IsWhitespace(c.RuneUnder(c.X)) {
+		if c.X == utf8.RuneCount(c.buf.LineBytes(c.Y)) {
+			c.Right()
+			return
+		}
+		c.Right()
+	}
+	c.Right()
+	for util.IsWordChar(c.RuneUnder(c.X)) {
+		if c.X == utf8.RuneCount(c.buf.LineBytes(c.Y)) {
+			return
+		}
+		c.Right()
+	}
+}
+
+// WordLeft moves the cursor one word to the left
+func (c *Cursor) WordLeft() {
+	c.Left()
+	for util.IsWhitespace(c.RuneUnder(c.X)) {
+		if c.X == 0 {
+			return
+		}
+		c.Left()
+	}
+	c.Left()
+	for util.IsWordChar(c.RuneUnder(c.X)) {
+		if c.X == 0 {
+			return
+		}
+		c.Left()
+	}
+	c.Right()
+}
+
+// RuneUnder returns the rune under the given x position
+func (c *Cursor) RuneUnder(x int) rune {
+	line := c.buf.LineBytes(c.Y)
+	if len(line) == 0 || x >= utf8.RuneCount(line) {
+		return '\n'
+	} else if x < 0 {
+		x = 0
+	}
+	i := 0
+	for len(line) > 0 {
+		r, size := utf8.DecodeRune(line)
+		line = line[size:]
+
+		if i == x {
+			return r
+		}
+
+		i++
+	}
+	return '\n'
+}
+
+func (c *Cursor) StoreVisualX() {
+	c.LastVisualX = c.GetVisualX()
+}

internal/buffer/eventhandler.go

@@ -1,11 +1,16 @@
-package main
+package buffer
 
 import (
-	"strings"
+	"bytes"
+	"log"
 	"time"
+	"unicode/utf8"
 
 	dmp "github.com/sergi/go-diff/diffmatchpatch"
-	"github.com/yuin/gopher-lua"
+	"github.com/zyedidia/micro/internal/config"
+	ulua "github.com/zyedidia/micro/internal/lua"
+	"github.com/zyedidia/micro/internal/screen"
+	luar "layeh.com/gopher-luar"
 )
 
 const (
@@ -17,6 +22,8 @@ const (
 	TextEventRemove = -1
 	// TextEventReplace represents a replace event
 	TextEventReplace = 0
+
+	undoThreshold = 1000 // If two events are less than n milliseconds apart, undo both of them
 )
 
 // TextEvent holds data for a manipulation on some text that can be undone
@@ -30,16 +37,16 @@ type TextEvent struct {
 
 // A Delta is a change to the buffer
 type Delta struct {
-	Text  string
+	Text  []byte
 	Start Loc
 	End   Loc
 }
 
 // ExecuteTextEvent runs a text event
-func ExecuteTextEvent(t *TextEvent, buf *Buffer) {
+func ExecuteTextEvent(t *TextEvent, buf *SharedBuffer) {
 	if t.EventType == TextEventInsert {
 		for _, d := range t.Deltas {
-			buf.insert(d.Start, []byte(d.Text))
+			buf.insert(d.Start, d.Text)
 		}
 	} else if t.EventType == TextEventRemove {
 		for i, d := range t.Deltas {
@@ -48,9 +55,9 @@ func ExecuteTextEvent(t *TextEvent, buf *Buffer) {
 	} else if t.EventType == TextEventReplace {
 		for i, d := range t.Deltas {
 			t.Deltas[i].Text = buf.remove(d.Start, d.End)
-			buf.insert(d.Start, []byte(d.Text))
+			buf.insert(d.Start, d.Text)
 			t.Deltas[i].Start = d.Start
-			t.Deltas[i].End = Loc{d.Start.X + Count(d.Text), d.Start.Y}
+			t.Deltas[i].End = Loc{d.Start.X + utf8.RuneCount(d.Text), d.Start.Y}
 		}
 		for i, j := 0, len(t.Deltas)-1; i < j; i, j = i+1, j-1 {
 			t.Deltas[i], t.Deltas[j] = t.Deltas[j], t.Deltas[i]
@@ -59,24 +66,27 @@ func ExecuteTextEvent(t *TextEvent, buf *Buffer) {
 }
 
 // UndoTextEvent undoes a text event
-func UndoTextEvent(t *TextEvent, buf *Buffer) {
+func UndoTextEvent(t *TextEvent, buf *SharedBuffer) {
 	t.EventType = -t.EventType
 	ExecuteTextEvent(t, buf)
 }
 
 // EventHandler executes text manipulations and allows undoing and redoing
 type EventHandler struct {
-	buf       *Buffer
-	UndoStack *Stack
-	RedoStack *Stack
+	buf       *SharedBuffer
+	cursors   []*Cursor
+	active    int
+	UndoStack *TEStack
+	RedoStack *TEStack
 }
 
 // NewEventHandler returns a new EventHandler
-func NewEventHandler(buf *Buffer) *EventHandler {
+func NewEventHandler(buf *SharedBuffer, cursors []*Cursor) *EventHandler {
 	eh := new(EventHandler)
-	eh.UndoStack = new(Stack)
-	eh.RedoStack = new(Stack)
+	eh.UndoStack = new(TEStack)
+	eh.RedoStack = new(TEStack)
 	eh.buf = buf
+	eh.cursors = cursors
 	return eh
 }
 
@@ -86,42 +96,66 @@ func NewEventHandler(buf *Buffer) *EventHandler {
 // through insert and delete events
 func (eh *EventHandler) ApplyDiff(new string) {
 	differ := dmp.New()
-	diff := differ.DiffMain(eh.buf.String(), new, false)
+	diff := differ.DiffMain(string(eh.buf.Bytes()), new, false)
 	loc := eh.buf.Start()
 	for _, d := range diff {
 		if d.Type == dmp.DiffDelete {
-			eh.Remove(loc, loc.Move(Count(d.Text), eh.buf))
+			eh.Remove(loc, loc.MoveLA(utf8.RuneCountInString(d.Text), eh.buf.LineArray))
 		} else {
 			if d.Type == dmp.DiffInsert {
 				eh.Insert(loc, d.Text)
 			}
-			loc = loc.Move(Count(d.Text), eh.buf)
+			loc = loc.MoveLA(utf8.RuneCountInString(d.Text), eh.buf.LineArray)
 		}
 	}
 }
 
 // Insert creates an insert text event and executes it
-func (eh *EventHandler) Insert(start Loc, text string) {
+func (eh *EventHandler) Insert(start Loc, textStr string) {
+	text := []byte(textStr)
+	eh.InsertBytes(start, text)
+}
+
+// InsertBytes creates an insert text event and executes it
+func (eh *EventHandler) InsertBytes(start Loc, text []byte) {
 	e := &TextEvent{
-		C:         *eh.buf.cursors[eh.buf.curCursor],
+		C:         *eh.cursors[eh.active],
 		EventType: TextEventInsert,
 		Deltas:    []Delta{{text, start, Loc{0, 0}}},
 		Time:      time.Now(),
 	}
+	// oldl := eh.buf.LinesNum()
 	eh.Execute(e)
-	e.Deltas[0].End = start.Move(Count(text), eh.buf)
+	// linecount := eh.buf.LinesNum() - oldl
+	textcount := utf8.RuneCount(text)
+	lastnl := bytes.LastIndex(text, []byte{'\n'})
+	var endX int
+	var textX int
+	if lastnl >= 0 {
+		endX = utf8.RuneCount(text[lastnl:])
+		textX = endX
+	} else {
+		// endX = start.X + textcount
+		textX = textcount
+	}
+
+	e.Deltas[0].End = start.MoveLA(textcount, eh.buf.LineArray)
+	// e.Deltas[0].End = clamp(Loc{endX, start.Y + linecount}, eh.buf.LineArray)
 	end := e.Deltas[0].End
 
-	for _, c := range eh.buf.cursors {
+	for _, c := range eh.cursors {
 		move := func(loc Loc) Loc {
+			log.Println("move", loc)
 			if start.Y != end.Y && loc.GreaterThan(start) {
 				loc.Y += end.Y - start.Y
 			} else if loc.Y == start.Y && loc.GreaterEqual(start) {
-				loc = loc.Move(Count(text), eh.buf)
+				loc.Y += end.Y - start.Y
+				loc.X += textX
 			}
 			return loc
 		}
 		c.Loc = move(c.Loc)
+		c.Relocate()
 		c.CurSelection[0] = move(c.CurSelection[0])
 		c.CurSelection[1] = move(c.CurSelection[1])
 		c.OrigSelection[0] = move(c.OrigSelection[0])
@@ -133,19 +167,19 @@ func (eh *EventHandler) Insert(start Loc, text string) {
 // Remove creates a remove text event and executes it
 func (eh *EventHandler) Remove(start, end Loc) {
 	e := &TextEvent{
-		C:         *eh.buf.cursors[eh.buf.curCursor],
+		C:         *eh.cursors[eh.active],
 		EventType: TextEventRemove,
-		Deltas:    []Delta{{"", start, end}},
+		Deltas:    []Delta{{[]byte{}, start, end}},
 		Time:      time.Now(),
 	}
 	eh.Execute(e)
 
-	for _, c := range eh.buf.cursors {
+	for _, c := range eh.cursors {
 		move := func(loc Loc) Loc {
 			if start.Y != end.Y && loc.GreaterThan(end) {
 				loc.Y -= end.Y - start.Y
 			} else if loc.Y == end.Y && loc.GreaterEqual(end) {
-				loc = loc.Move(-Diff(start, end, eh.buf), eh.buf)
+				loc = loc.MoveLA(-DiffLA(start, end, eh.buf.LineArray), eh.buf.LineArray)
 			}
 			return loc
 		}
@@ -161,7 +195,7 @@ func (eh *EventHandler) Remove(start, end Loc) {
 // MultipleReplace creates an multiple insertions executes them
 func (eh *EventHandler) MultipleReplace(deltas []Delta) {
 	e := &TextEvent{
-		C:         *eh.buf.cursors[eh.buf.curCursor],
+		C:         *eh.cursors[eh.active],
 		EventType: TextEventReplace,
 		Deltas:    deltas,
 		Time:      time.Now(),
@@ -178,18 +212,17 @@ func (eh *EventHandler) Replace(start, end Loc, replace string) {
 // Execute a textevent and add it to the undo stack
 func (eh *EventHandler) Execute(t *TextEvent) {
 	if eh.RedoStack.Len() > 0 {
-		eh.RedoStack = new(Stack)
+		eh.RedoStack = new(TEStack)
 	}
 	eh.UndoStack.Push(t)
 
-	for pl := range loadedPlugins {
-		ret, err := Call(pl+".onBeforeTextEvent", t)
-		if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
-			TermMessage(err)
-		}
-		if val, ok := ret.(lua.LBool); ok && val == lua.LFalse {
-			return
-		}
+	b, err := config.RunPluginFnBool("onBeforeTextEvent", luar.New(ulua.L, eh.buf), luar.New(ulua.L, t))
+	if err != nil {
+		screen.TermMessage(err)
+	}
+
+	if !b {
+		return
 	}
 
 	ExecuteTextEvent(t, eh.buf)
@@ -203,8 +236,7 @@ func (eh *EventHandler) Undo() {
 	}
 
 	startTime := t.Time.UnixNano() / int64(time.Millisecond)
-
-	eh.UndoOneEvent()
+	endTime := startTime - (startTime % undoThreshold)
 
 	for {
 		t = eh.UndoStack.Peek()
@@ -212,10 +244,9 @@ func (eh *EventHandler) Undo() {
 			return
 		}
 
-		if startTime-(t.Time.UnixNano()/int64(time.Millisecond)) > undoThreshold {
+		if t.Time.UnixNano()/int64(time.Millisecond) < endTime {
 			return
 		}
-		startTime = t.Time.UnixNano() / int64(time.Millisecond)
 
 		eh.UndoOneEvent()
 	}
@@ -236,9 +267,9 @@ func (eh *EventHandler) UndoOneEvent() {
 
 	// Set the cursor in the right place
 	teCursor := t.C
-	if teCursor.Num >= 0 && teCursor.Num < len(eh.buf.cursors) {
-		t.C = *eh.buf.cursors[teCursor.Num]
-		eh.buf.cursors[teCursor.Num].Goto(teCursor)
+	if teCursor.Num >= 0 && teCursor.Num < len(eh.cursors) {
+		t.C = *eh.cursors[teCursor.Num]
+		eh.cursors[teCursor.Num].Goto(teCursor)
 	} else {
 		teCursor.Num = -1
 	}
@@ -255,8 +286,7 @@ func (eh *EventHandler) Redo() {
 	}
 
 	startTime := t.Time.UnixNano() / int64(time.Millisecond)
-
-	eh.RedoOneEvent()
+	endTime := startTime - (startTime % undoThreshold) + undoThreshold
 
 	for {
 		t = eh.RedoStack.Peek()
@@ -264,7 +294,7 @@ func (eh *EventHandler) Redo() {
 			return
 		}
 
-		if (t.Time.UnixNano()/int64(time.Millisecond))-startTime > undoThreshold {
+		if t.Time.UnixNano()/int64(time.Millisecond) > endTime {
 			return
 		}
 
@@ -283,9 +313,9 @@ func (eh *EventHandler) RedoOneEvent() {
 	UndoTextEvent(t, eh.buf)
 
 	teCursor := t.C
-	if teCursor.Num >= 0 && teCursor.Num < len(eh.buf.cursors) {
-		t.C = *eh.buf.cursors[teCursor.Num]
-		eh.buf.cursors[teCursor.Num].Goto(teCursor)
+	if teCursor.Num >= 0 && teCursor.Num < len(eh.cursors) {
+		t.C = *eh.cursors[teCursor.Num]
+		eh.cursors[teCursor.Num].Goto(teCursor)
 	} else {
 		teCursor.Num = -1
 	}

internal/buffer/line_array.go

@@ -0,0 +1,346 @@
+package buffer
+
+import (
+	"bufio"
+	"io"
+	"sync"
+	"unicode/utf8"
+
+	"github.com/zyedidia/micro/pkg/highlight"
+)
+
+// Finds the byte index of the nth rune in a byte slice
+func runeToByteIndex(n int, txt []byte) int {
+	if n == 0 {
+		return 0
+	}
+
+	count := 0
+	i := 0
+	for len(txt) > 0 {
+		_, size := utf8.DecodeRune(txt)
+
+		txt = txt[size:]
+		count += size
+		i++
+
+		if i == n {
+			break
+		}
+	}
+	return count
+}
+
+// A Line contains the data in bytes as well as a highlight state, match
+// and a flag for whether the highlighting needs to be updated
+type Line struct {
+	data []byte
+
+	state       highlight.State
+	match       highlight.LineMatch
+	rehighlight bool
+	lock        sync.Mutex
+}
+
+const (
+	// Line ending file formats
+	FFAuto = 0 // Autodetect format
+	FFUnix = 1 // LF line endings (unix style '\n')
+	FFDos  = 2 // CRLF line endings (dos style '\r\n')
+)
+
+type FileFormat byte
+
+// A LineArray simply stores and array of lines and makes it easy to insert
+// and delete in it
+type LineArray struct {
+	lines    []Line
+	Endings  FileFormat
+	initsize uint64
+}
+
+// Append efficiently appends lines together
+// It allocates an additional 10000 lines if the original estimate
+// is incorrect
+func Append(slice []Line, data ...Line) []Line {
+	l := len(slice)
+	if l+len(data) > cap(slice) { // reallocate
+		newSlice := make([]Line, (l+len(data))+10000)
+		copy(newSlice, slice)
+		slice = newSlice
+	}
+	slice = slice[0 : l+len(data)]
+	for i, c := range data {
+		slice[l+i] = c
+	}
+	return slice
+}
+
+// NewLineArray returns a new line array from an array of bytes
+func NewLineArray(size uint64, endings FileFormat, reader io.Reader) *LineArray {
+	la := new(LineArray)
+
+	la.lines = make([]Line, 0, 1000)
+	la.initsize = size
+
+	br := bufio.NewReader(reader)
+	var loaded int
+
+	n := 0
+	for {
+		data, err := br.ReadBytes('\n')
+		// Detect the line ending by checking to see if there is a '\r' char
+		// before the '\n'
+		// Even if the file format is set to DOS, the '\r' is removed so
+		// that all lines end with '\n'
+		dlen := len(data)
+		if dlen > 1 && data[dlen-2] == '\r' {
+			data = append(data[:dlen-2], '\n')
+			if endings == FFAuto {
+				la.Endings = FFDos
+			}
+			dlen = len(data)
+		} else if dlen > 0 {
+			if endings == FFAuto {
+				la.Endings = FFUnix
+			}
+		}
+
+		// If we are loading a large file (greater than 1000) we use the file
+		// size and the length of the first 1000 lines to try to estimate
+		// how many lines will need to be allocated for the rest of the file
+		// We add an extra 10000 to the original estimate to be safe and give
+		// plenty of room for expansion
+		if n >= 1000 && loaded >= 0 {
+			totalLinesNum := int(float64(size) * (float64(n) / float64(loaded)))
+			newSlice := make([]Line, len(la.lines), totalLinesNum+10000)
+			copy(newSlice, la.lines)
+			la.lines = newSlice
+			loaded = -1
+		}
+
+		// Counter for the number of bytes in the first 1000 lines
+		if loaded >= 0 {
+			loaded += dlen
+		}
+
+		if err != nil {
+			if err == io.EOF {
+				la.lines = Append(la.lines, Line{
+					data:        data[:],
+					state:       nil,
+					match:       nil,
+					rehighlight: false,
+				})
+			}
+			// Last line was read
+			break
+		} else {
+			la.lines = Append(la.lines, Line{
+				data:        data[:dlen-1],
+				state:       nil,
+				match:       nil,
+				rehighlight: false,
+			})
+		}
+		n++
+	}
+
+	return la
+}
+
+// Bytes returns the string that should be written to disk when
+// the line array is saved
+func (la *LineArray) Bytes() []byte {
+	str := make([]byte, 0, la.initsize+1000) // initsize should provide a good estimate
+	for i, l := range la.lines {
+		str = append(str, l.data...)
+		if i != len(la.lines)-1 {
+			if la.Endings == FFDos {
+				str = append(str, '\r')
+			}
+			str = append(str, '\n')
+		}
+	}
+	return str
+}
+
+// newlineBelow adds a newline below the given line number
+func (la *LineArray) newlineBelow(y int) {
+	la.lines = append(la.lines, Line{
+		data:        []byte{' '},
+		state:       nil,
+		match:       nil,
+		rehighlight: false,
+	})
+	copy(la.lines[y+2:], la.lines[y+1:])
+	la.lines[y+1] = Line{
+		data:        []byte{},
+		state:       la.lines[y].state,
+		match:       nil,
+		rehighlight: false,
+	}
+}
+
+// Inserts a byte array at a given location
+func (la *LineArray) insert(pos Loc, value []byte) {
+	x, y := runeToByteIndex(pos.X, la.lines[pos.Y].data), pos.Y
+	for i := 0; i < len(value); i++ {
+		if value[i] == '\n' {
+			la.split(Loc{x, y})
+			x = 0
+			y++
+			continue
+		}
+		la.insertByte(Loc{x, y}, value[i])
+		x++
+	}
+}
+
+// InsertByte inserts a byte at a given location
+func (la *LineArray) insertByte(pos Loc, value byte) {
+	la.lines[pos.Y].data = append(la.lines[pos.Y].data, 0)
+	copy(la.lines[pos.Y].data[pos.X+1:], la.lines[pos.Y].data[pos.X:])
+	la.lines[pos.Y].data[pos.X] = value
+}
+
+// joinLines joins the two lines a and b
+func (la *LineArray) joinLines(a, b int) {
+	la.insert(Loc{len(la.lines[a].data), a}, la.lines[b].data)
+	la.deleteLine(b)
+}
+
+// split splits a line at a given position
+func (la *LineArray) split(pos Loc) {
+	la.newlineBelow(pos.Y)
+	la.insert(Loc{0, pos.Y + 1}, la.lines[pos.Y].data[pos.X:])
+	la.lines[pos.Y+1].state = la.lines[pos.Y].state
+	la.lines[pos.Y].state = nil
+	la.lines[pos.Y].match = nil
+	la.lines[pos.Y+1].match = nil
+	la.lines[pos.Y].rehighlight = true
+	la.deleteToEnd(Loc{pos.X, pos.Y})
+}
+
+// removes from start to end
+func (la *LineArray) remove(start, end Loc) []byte {
+	sub := la.Substr(start, end)
+	startX := runeToByteIndex(start.X, la.lines[start.Y].data)
+	endX := runeToByteIndex(end.X, la.lines[end.Y].data)
+	if start.Y == end.Y {
+		la.lines[start.Y].data = append(la.lines[start.Y].data[:startX], la.lines[start.Y].data[endX:]...)
+	} else {
+		for i := start.Y + 1; i <= end.Y-1; i++ {
+			la.deleteLine(start.Y + 1)
+		}
+		la.deleteToEnd(Loc{startX, start.Y})
+		la.deleteFromStart(Loc{endX - 1, start.Y + 1})
+		la.joinLines(start.Y, start.Y+1)
+	}
+	return sub
+}
+
+// deleteToEnd deletes from the end of a line to the position
+func (la *LineArray) deleteToEnd(pos Loc) {
+	la.lines[pos.Y].data = la.lines[pos.Y].data[:pos.X]
+}
+
+// deleteFromStart deletes from the start of a line to the position
+func (la *LineArray) deleteFromStart(pos Loc) {
+	la.lines[pos.Y].data = la.lines[pos.Y].data[pos.X+1:]
+}
+
+// deleteLine deletes the line number
+func (la *LineArray) deleteLine(y int) {
+	la.lines = la.lines[:y+copy(la.lines[y:], la.lines[y+1:])]
+}
+
+// DeleteByte deletes the byte at a position
+func (la *LineArray) deleteByte(pos Loc) {
+	la.lines[pos.Y].data = la.lines[pos.Y].data[:pos.X+copy(la.lines[pos.Y].data[pos.X:], la.lines[pos.Y].data[pos.X+1:])]
+}
+
+// Substr returns the string representation between two locations
+func (la *LineArray) Substr(start, end Loc) []byte {
+	startX := runeToByteIndex(start.X, la.lines[start.Y].data)
+	endX := runeToByteIndex(end.X, la.lines[end.Y].data)
+	if start.Y == end.Y {
+		src := la.lines[start.Y].data[startX:endX]
+		dest := make([]byte, len(src))
+		copy(dest, src)
+		return dest
+	}
+	str := make([]byte, 0, len(la.lines[start.Y+1].data)*(end.Y-start.Y))
+	str = append(str, la.lines[start.Y].data[startX:]...)
+	str = append(str, '\n')
+	for i := start.Y + 1; i <= end.Y-1; i++ {
+		str = append(str, la.lines[i].data...)
+		str = append(str, '\n')
+	}
+	str = append(str, la.lines[end.Y].data[:endX]...)
+	return str
+}
+
+// LinesNum returns the number of lines in the buffer
+func (la *LineArray) LinesNum() int {
+	return len(la.lines)
+}
+
+// Start returns the start of the buffer
+func (la *LineArray) Start() Loc {
+	return Loc{0, 0}
+}
+
+// End returns the location of the last character in the buffer
+func (la *LineArray) End() Loc {
+	numlines := len(la.lines)
+	return Loc{utf8.RuneCount(la.lines[numlines-1].data), numlines - 1}
+}
+
+// LineBytes returns line n as an array of bytes
+func (la *LineArray) LineBytes(n int) []byte {
+	if n >= len(la.lines) || n < 0 {
+		return []byte{}
+	}
+	return la.lines[n].data
+}
+
+// State gets the highlight state for the given line number
+func (la *LineArray) State(lineN int) highlight.State {
+	la.lines[lineN].lock.Lock()
+	defer la.lines[lineN].lock.Unlock()
+	return la.lines[lineN].state
+}
+
+// SetState sets the highlight state at the given line number
+func (la *LineArray) SetState(lineN int, s highlight.State) {
+	la.lines[lineN].lock.Lock()
+	defer la.lines[lineN].lock.Unlock()
+	la.lines[lineN].state = s
+}
+
+// SetMatch sets the match at the given line number
+func (la *LineArray) SetMatch(lineN int, m highlight.LineMatch) {
+	la.lines[lineN].lock.Lock()
+	defer la.lines[lineN].lock.Unlock()
+	la.lines[lineN].match = m
+}
+
+// Match retrieves the match for the given line number
+func (la *LineArray) Match(lineN int) highlight.LineMatch {
+	la.lines[lineN].lock.Lock()
+	defer la.lines[lineN].lock.Unlock()
+	return la.lines[lineN].match
+}
+
+func (la *LineArray) Rehighlight(lineN int) bool {
+	la.lines[lineN].lock.Lock()
+	defer la.lines[lineN].lock.Unlock()
+	return la.lines[lineN].rehighlight
+}
+
+func (la *LineArray) SetRehighlight(lineN int, on bool) {
+	la.lines[lineN].lock.Lock()
+	defer la.lines[lineN].lock.Unlock()
+	la.lines[lineN].rehighlight = on
+}

internal/buffer/line_array_test.go

@@ -0,0 +1,60 @@
+package buffer
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var unicode_txt = `An preost wes on leoden, Laȝamon was ihoten
+He wes Leovenaðes sone -- liðe him be Drihten.
+He wonede at Ernleȝe at æðelen are chirechen,
+Uppen Sevarne staþe, sel þar him þuhte,
+Onfest Radestone, þer he bock radde.`
+
+var la *LineArray
+
+func init() {
+	reader := strings.NewReader(unicode_txt)
+	la = NewLineArray(uint64(len(unicode_txt)), FFAuto, reader)
+}
+
+func TestSplit(t *testing.T) {
+	la.insert(Loc{17, 1}, []byte{'\n'})
+	assert.Equal(t, len(la.lines), 6)
+	sub1 := la.Substr(Loc{0, 1}, Loc{17, 1})
+	sub2 := la.Substr(Loc{0, 2}, Loc{30, 2})
+
+	assert.Equal(t, []byte("He wes Leovenaðes"), sub1)
+	assert.Equal(t, []byte(" sone -- liðe him be Drihten."), sub2)
+}
+
+func TestJoin(t *testing.T) {
+	la.remove(Loc{47, 1}, Loc{0, 2})
+	assert.Equal(t, len(la.lines), 5)
+	sub := la.Substr(Loc{0, 1}, Loc{47, 1})
+	bytes := la.Bytes()
+
+	assert.Equal(t, []byte("He wes Leovenaðes sone -- liðe him be Drihten."), sub)
+	assert.Equal(t, unicode_txt, string(bytes))
+}
+
+func TestInsert(t *testing.T) {
+	la.insert(Loc{20, 3}, []byte(" foobar"))
+	sub1 := la.Substr(Loc{0, 3}, Loc{50, 3})
+
+	assert.Equal(t, []byte("Uppen Sevarne staþe, foobar sel þar him þuhte,"), sub1)
+
+	la.insert(Loc{25, 2}, []byte("ಮಣ್ಣಾಗಿ"))
+	sub2 := la.Substr(Loc{0, 2}, Loc{60, 2})
+	assert.Equal(t, []byte("He wonede at Ernleȝe at æಮಣ್ಣಾಗಿðelen are chirechen,"), sub2)
+}
+
+func TestRemove(t *testing.T) {
+	la.remove(Loc{20, 3}, Loc{27, 3})
+	la.remove(Loc{25, 2}, Loc{32, 2})
+
+	bytes := la.Bytes()
+	assert.Equal(t, unicode_txt, string(bytes))
+}

internal/buffer/loc.go

@@ -1,61 +1,58 @@
-package main
+package buffer
 
-// FromCharPos converts from a character position to an x, y position
-func FromCharPos(loc int, buf *Buffer) Loc {
-	charNum := 0
-	x, y := 0, 0
+import (
+	"unicode/utf8"
 
-	lineLen := Count(buf.Line(y)) + 1
-	for charNum+lineLen <= loc {
-		charNum += lineLen
-		y++
-		lineLen = Count(buf.Line(y)) + 1
-	}
-	x = loc - charNum
-
-	return Loc{x, y}
-}
-
-// ToCharPos converts from an x, y position to a character position
-func ToCharPos(start Loc, buf *Buffer) int {
-	x, y := start.X, start.Y
-	loc := 0
-	for i := 0; i < y; i++ {
-		// + 1 for the newline
-		loc += Count(buf.Line(i)) + 1
-	}
-	loc += x
-	return loc
-}
-
-// InBounds returns whether the given location is a valid character position in the given buffer
-func InBounds(pos Loc, buf *Buffer) bool {
-	if pos.Y < 0 || pos.Y >= buf.NumLines || pos.X < 0 || pos.X > Count(buf.Line(pos.Y)) {
-		return false
-	}
-
-	return true
-}
-
-// ByteOffset is just like ToCharPos except it counts bytes instead of runes
-func ByteOffset(pos Loc, buf *Buffer) int {
-	x, y := pos.X, pos.Y
-	loc := 0
-	for i := 0; i < y; i++ {
-		// + 1 for the newline
-		loc += len(buf.Line(i)) + 1
-	}
-	loc += len(buf.Line(y)[:x])
-	return loc
-}
+	"github.com/zyedidia/micro/internal/util"
+)
 
 // Loc stores a location
 type Loc struct {
 	X, Y int
 }
 
+// LessThan returns true if b is smaller
+func (l Loc) LessThan(b Loc) bool {
+	if l.Y < b.Y {
+		return true
+	}
+	return l.Y == b.Y && l.X < b.X
+}
+
+// GreaterThan returns true if b is bigger
+func (l Loc) GreaterThan(b Loc) bool {
+	if l.Y > b.Y {
+		return true
+	}
+	return l.Y == b.Y && l.X > b.X
+}
+
+// GreaterEqual returns true if b is greater than or equal to b
+func (l Loc) GreaterEqual(b Loc) bool {
+	if l.Y > b.Y {
+		return true
+	}
+	if l.Y == b.Y && l.X > b.X {
+		return true
+	}
+	return l == b
+}
+
+// LessEqual returns true if b is less than or equal to b
+func (l Loc) LessEqual(b Loc) bool {
+	if l.Y < b.Y {
+		return true
+	}
+	if l.Y == b.Y && l.X < b.X {
+		return true
+	}
+	return l == b
+}
+
+// The following functions require a buffer to know where newlines are
+
 // Diff returns the distance between two locations
-func Diff(a, b Loc, buf *Buffer) int {
+func DiffLA(a, b Loc, buf *LineArray) int {
 	if a.Y == b.Y {
 		if a.X > b.X {
 			return a.X - b.X
@@ -71,69 +68,19 @@ func Diff(a, b Loc, buf *Buffer) int {
 	loc := 0
 	for i := a.Y + 1; i < b.Y; i++ {
 		// + 1 for the newline
-		loc += Count(buf.Line(i)) + 1
+		loc += utf8.RuneCount(buf.LineBytes(i)) + 1
 	}
-	loc += Count(buf.Line(a.Y)) - a.X + b.X + 1
+	loc += utf8.RuneCount(buf.LineBytes(a.Y)) - a.X + b.X + 1
 	return loc
 }
 
-// LessThan returns true if b is smaller
-func (l Loc) LessThan(b Loc) bool {
-	if l.Y < b.Y {
-		return true
-	}
-	if l.Y == b.Y && l.X < b.X {
-		return true
-	}
-	return false
-}
-
-// GreaterThan returns true if b is bigger
-func (l Loc) GreaterThan(b Loc) bool {
-	if l.Y > b.Y {
-		return true
-	}
-	if l.Y == b.Y && l.X > b.X {
-		return true
-	}
-	return false
-}
-
-// GreaterEqual returns true if b is greater than or equal to b
-func (l Loc) GreaterEqual(b Loc) bool {
-	if l.Y > b.Y {
-		return true
-	}
-	if l.Y == b.Y && l.X > b.X {
-		return true
-	}
-	if l == b {
-		return true
-	}
-	return false
-}
-
-// LessEqual returns true if b is less than or equal to b
-func (l Loc) LessEqual(b Loc) bool {
-	if l.Y < b.Y {
-		return true
-	}
-	if l.Y == b.Y && l.X < b.X {
-		return true
-	}
-	if l == b {
-		return true
-	}
-	return false
-}
-
 // This moves the location one character to the right
-func (l Loc) right(buf *Buffer) Loc {
+func (l Loc) right(buf *LineArray) Loc {
 	if l == buf.End() {
 		return Loc{l.X + 1, l.Y}
 	}
 	var res Loc
-	if l.X < Count(buf.Line(l.Y)) {
+	if l.X < utf8.RuneCount(buf.LineBytes(l.Y)) {
 		res = Loc{l.X + 1, l.Y}
 	} else {
 		res = Loc{0, l.Y + 1}
@@ -142,7 +89,7 @@ func (l Loc) right(buf *Buffer) Loc {
 }
 
 // This moves the given location one character to the left
-func (l Loc) left(buf *Buffer) Loc {
+func (l Loc) left(buf *LineArray) Loc {
 	if l == buf.Start() {
 		return Loc{l.X - 1, l.Y}
 	}
@@ -150,22 +97,51 @@ func (l Loc) left(buf *Buffer) Loc {
 	if l.X > 0 {
 		res = Loc{l.X - 1, l.Y}
 	} else {
-		res = Loc{Count(buf.Line(l.Y - 1)), l.Y - 1}
+		res = Loc{utf8.RuneCount(buf.LineBytes(l.Y - 1)), l.Y - 1}
 	}
 	return res
 }
 
 // Move moves the cursor n characters to the left or right
 // It moves the cursor left if n is negative
-func (l Loc) Move(n int, buf *Buffer) Loc {
+func (l Loc) MoveLA(n int, buf *LineArray) Loc {
 	if n > 0 {
 		for i := 0; i < n; i++ {
 			l = l.right(buf)
 		}
 		return l
 	}
-	for i := 0; i < Abs(n); i++ {
+	for i := 0; i < util.Abs(n); i++ {
 		l = l.left(buf)
 	}
 	return l
 }
+
+func (l Loc) Diff(a, b Loc, buf *Buffer) int {
+	return DiffLA(a, b, buf.LineArray)
+}
+func (l Loc) Move(n int, buf *Buffer) Loc {
+	return l.MoveLA(n, buf.LineArray)
+}
+
+// ByteOffset is just like ToCharPos except it counts bytes instead of runes
+func ByteOffset(pos Loc, buf *Buffer) int {
+	x, y := pos.X, pos.Y
+	loc := 0
+	for i := 0; i < y; i++ {
+		// + 1 for the newline
+		loc += len(buf.Line(i)) + 1
+	}
+	loc += len(buf.Line(y)[:x])
+	return loc
+}
+
+// clamps a loc within a buffer
+func clamp(pos Loc, la *LineArray) Loc {
+	if pos.GreaterEqual(la.End()) {
+		return la.End().MoveLA(-1, la)
+	} else if pos.LessThan(la.Start()) {
+		return la.Start()
+	}
+	return pos
+}

internal/buffer/message.go

@@ -0,0 +1,84 @@
+package buffer
+
+import (
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/tcell"
+)
+
+type MsgType int
+
+const (
+	MTInfo = iota
+	MTWarning
+	MTError
+)
+
+// Message represents the information for a gutter message
+type Message struct {
+	// The Msg iteslf
+	Msg string
+	// Start and End locations for the message
+	Start, End Loc
+	// The Kind stores the message type
+	Kind MsgType
+	// The Owner of the message
+	Owner string
+}
+
+// NewMessage creates a new gutter message
+func NewMessage(owner string, msg string, start, end Loc, kind MsgType) *Message {
+	return &Message{
+		Msg:   msg,
+		Start: start,
+		End:   end,
+		Kind:  kind,
+		Owner: owner,
+	}
+}
+
+// NewMessageAtLine creates a new gutter message at a given line
+func NewMessageAtLine(owner string, msg string, line int, kind MsgType) *Message {
+	start := Loc{-1, line - 1}
+	end := start
+	return NewMessage(owner, msg, start, end, kind)
+}
+
+func (m *Message) Style() tcell.Style {
+	switch m.Kind {
+	case MTInfo:
+		if style, ok := config.Colorscheme["gutter-info"]; ok {
+			return style
+		}
+	case MTWarning:
+		if style, ok := config.Colorscheme["gutter-warning"]; ok {
+			return style
+		}
+	case MTError:
+		if style, ok := config.Colorscheme["gutter-error"]; ok {
+			return style
+		}
+	}
+	return config.DefStyle
+}
+
+func (b *Buffer) AddMessage(m *Message) {
+	b.Messages = append(b.Messages, m)
+}
+
+func (b *Buffer) removeMsg(i int) {
+	copy(b.Messages[i:], b.Messages[i+1:])
+	b.Messages[len(b.Messages)-1] = nil
+	b.Messages = b.Messages[:len(b.Messages)-1]
+}
+
+func (b *Buffer) ClearMessages(owner string) {
+	for i := len(b.Messages) - 1; i >= 0; i-- {
+		if b.Messages[i].Owner == owner {
+			b.removeMsg(i)
+		}
+	}
+}
+
+func (b *Buffer) ClearAllMessages() {
+	b.Messages = make([]*Message, 0)
+}

internal/buffer/save.go

@@ -0,0 +1,198 @@
+package buffer
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"os"
+	"os/exec"
+	"os/signal"
+	"path/filepath"
+	"runtime"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/screen"
+	"github.com/zyedidia/micro/internal/util"
+	"golang.org/x/text/encoding"
+	"golang.org/x/text/encoding/htmlindex"
+	"golang.org/x/text/transform"
+)
+
+// LargeFileThreshold is the number of bytes when fastdirty is forced
+// because hashing is too slow
+const LargeFileThreshold = 50000
+
+// overwriteFile opens the given file for writing, truncating if one exists, and then calls
+// the supplied function with the file as io.Writer object, also making sure the file is
+// closed afterwards.
+func overwriteFile(name string, enc encoding.Encoding, fn func(io.Writer) error, withSudo bool) (err error) {
+	var writeCloser io.WriteCloser
+
+	if withSudo {
+		cmd := exec.Command(config.GlobalSettings["sucmd"].(string), "dd", "bs=4k", "of="+name)
+
+		if writeCloser, err = cmd.StdinPipe(); err != nil {
+			return
+		}
+
+		c := make(chan os.Signal, 1)
+		signal.Notify(c, os.Interrupt)
+		go func() {
+			<-c
+			cmd.Process.Kill()
+		}()
+
+		defer func() {
+			screenb := screen.TempFini()
+			if e := cmd.Run(); e != nil && err == nil {
+				err = e
+			}
+			screen.TempStart(screenb)
+		}()
+	} else if writeCloser, err = os.OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil {
+		return
+	}
+
+	w := transform.NewWriter(writeCloser, enc.NewEncoder())
+	err = fn(w)
+
+	if e := writeCloser.Close(); e != nil && err == nil {
+		err = e
+	}
+
+	return
+}
+
+// Save saves the buffer to its default path
+func (b *Buffer) Save() error {
+	return b.SaveAs(b.Path)
+}
+
+// SaveAs saves the buffer to a specified path (filename), creating the file if it does not exist
+func (b *Buffer) SaveAs(filename string) error {
+	return b.saveToFile(filename, false)
+}
+
+func (b *Buffer) SaveWithSudo() error {
+	return b.SaveAsWithSudo(b.Path)
+}
+
+func (b *Buffer) SaveAsWithSudo(filename string) error {
+	return b.saveToFile(filename, true)
+}
+
+func (b *Buffer) saveToFile(filename string, withSudo bool) error {
+	var err error
+	if b.Type.Readonly {
+		return errors.New("Cannot save readonly buffer")
+	}
+	if b.Type.Scratch {
+		return errors.New("Cannot save scratch buffer")
+	}
+	if withSudo && runtime.GOOS == "windows" {
+		return errors.New("Save with sudo not supported on Windows")
+	}
+
+	b.UpdateRules()
+	if b.Settings["rmtrailingws"].(bool) {
+		for i, l := range b.lines {
+			leftover := utf8.RuneCount(bytes.TrimRightFunc(l.data, unicode.IsSpace))
+
+			linelen := utf8.RuneCount(l.data)
+			b.Remove(Loc{leftover, i}, Loc{linelen, i})
+		}
+
+		b.RelocateCursors()
+	}
+
+	if b.Settings["eofnewline"].(bool) {
+		end := b.End()
+		if b.RuneAt(Loc{end.X - 1, end.Y}) != '\n' {
+			b.Insert(end, "\n")
+		}
+	}
+
+	// Update the last time this file was updated after saving
+	defer func() {
+		b.ModTime, _ = util.GetModTime(filename)
+		err = b.Serialize()
+	}()
+
+	// Removes any tilde and replaces with the absolute path to home
+	absFilename, _ := util.ReplaceHome(filename)
+
+	// Get the leading path to the file | "." is returned if there's no leading path provided
+	if dirname := filepath.Dir(absFilename); dirname != "." {
+		// Check if the parent dirs don't exist
+		if _, statErr := os.Stat(dirname); os.IsNotExist(statErr) {
+			// Prompt to make sure they want to create the dirs that are missing
+			if b.Settings["mkparents"].(bool) {
+				// Create all leading dir(s) since they don't exist
+				if mkdirallErr := os.MkdirAll(dirname, os.ModePerm); mkdirallErr != nil {
+					// If there was an error creating the dirs
+					return mkdirallErr
+				}
+			} else {
+				return errors.New("Parent dirs don't exist, enable 'mkparents' for auto creation")
+			}
+		}
+	}
+
+	var fileSize int
+
+	enc, err := htmlindex.Get(b.Settings["encoding"].(string))
+	if err != nil {
+		return err
+	}
+
+	fwriter := func(file io.Writer) (e error) {
+		if len(b.lines) == 0 {
+			return
+		}
+
+		// end of line
+		var eol []byte
+		if b.Endings == FFDos {
+			eol = []byte{'\r', '\n'}
+		} else {
+			eol = []byte{'\n'}
+		}
+
+		// write lines
+		if fileSize, e = file.Write(b.lines[0].data); e != nil {
+			return
+		}
+
+		for _, l := range b.lines[1:] {
+			if _, e = file.Write(eol); e != nil {
+				return
+			}
+			if _, e = file.Write(l.data); e != nil {
+				return
+			}
+			fileSize += len(eol) + len(l.data)
+		}
+		return
+	}
+
+	if err = overwriteFile(absFilename, enc, fwriter, withSudo); err != nil {
+		return err
+	}
+
+	if !b.Settings["fastdirty"].(bool) {
+		if fileSize > LargeFileThreshold {
+			// For large files 'fastdirty' needs to be on
+			b.Settings["fastdirty"] = true
+		} else {
+			calcHash(b, &b.origHash)
+		}
+	}
+
+	b.Path = filename
+	absPath, _ := filepath.Abs(filename)
+	b.AbsPath = absPath
+	b.isModified = false
+	return err
+}

internal/buffer/search.go

@@ -0,0 +1,170 @@
+package buffer
+
+import (
+	"regexp"
+	"unicode/utf8"
+
+	"github.com/zyedidia/micro/internal/util"
+)
+
+func (b *Buffer) findDown(r *regexp.Regexp, start, end Loc) ([2]Loc, bool) {
+	start.Y = util.Clamp(start.Y, 0, b.LinesNum()-1)
+	end.Y = util.Clamp(end.Y, 0, b.LinesNum()-1)
+
+	if start.GreaterThan(end) {
+		start, end = end, start
+	}
+
+	for i := start.Y; i <= end.Y; i++ {
+		l := b.LineBytes(i)
+		charpos := 0
+
+		if i == start.Y && start.Y == end.Y {
+			nchars := utf8.RuneCount(l)
+			start.X = util.Clamp(start.X, 0, nchars)
+			end.X = util.Clamp(end.X, 0, nchars)
+			l = util.SliceStart(l, end.X)
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		} else if i == start.Y {
+			nchars := utf8.RuneCount(l)
+			start.X = util.Clamp(start.X, 0, nchars)
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		} else if i == end.Y {
+			nchars := utf8.RuneCount(l)
+			end.X = util.Clamp(end.X, 0, nchars)
+			l = util.SliceStart(l, end.X)
+		}
+
+		match := r.FindIndex(l)
+
+		if match != nil {
+			start := Loc{charpos + util.RunePos(l, match[0]), i}
+			end := Loc{charpos + util.RunePos(l, match[1]), i}
+			return [2]Loc{start, end}, true
+		}
+	}
+	return [2]Loc{}, false
+}
+
+func (b *Buffer) findUp(r *regexp.Regexp, start, end Loc) ([2]Loc, bool) {
+	start.Y = util.Clamp(start.Y, 0, b.LinesNum()-1)
+	end.Y = util.Clamp(end.Y, 0, b.LinesNum()-1)
+
+	if start.GreaterThan(end) {
+		start, end = end, start
+	}
+
+	for i := end.Y; i >= start.Y; i-- {
+		l := b.LineBytes(i)
+		charpos := 0
+
+		if i == start.Y && start.Y == end.Y {
+			nchars := utf8.RuneCount(l)
+			start.X = util.Clamp(start.X, 0, nchars)
+			end.X = util.Clamp(end.X, 0, nchars)
+			l = util.SliceStart(l, end.X)
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		} else if i == start.Y {
+			nchars := utf8.RuneCount(l)
+			start.X = util.Clamp(start.X, 0, nchars)
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		} else if i == end.Y {
+			nchars := utf8.RuneCount(l)
+			end.X = util.Clamp(end.X, 0, nchars)
+			l = util.SliceStart(l, end.X)
+		}
+
+		match := r.FindIndex(l)
+
+		if match != nil {
+			start := Loc{charpos + util.RunePos(l, match[0]), i}
+			end := Loc{charpos + util.RunePos(l, match[1]), i}
+			return [2]Loc{start, end}, true
+		}
+	}
+	return [2]Loc{}, false
+}
+
+// FindNext finds the next occurrence of a given string in the buffer
+// It returns the start and end location of the match (if found) and
+// a boolean indicating if it was found
+// May also return an error if the search regex is invalid
+func (b *Buffer) FindNext(s string, start, end, from Loc, down bool, useRegex bool) ([2]Loc, bool, error) {
+	if s == "" {
+		return [2]Loc{}, false, nil
+	}
+
+	var r *regexp.Regexp
+	var err error
+
+	if !useRegex {
+		s = regexp.QuoteMeta(s)
+	}
+
+	if b.Settings["ignorecase"].(bool) {
+		r, err = regexp.Compile("(?i)" + s)
+	} else {
+		r, err = regexp.Compile(s)
+	}
+
+	if err != nil {
+		return [2]Loc{}, false, err
+	}
+
+	var found bool
+	var l [2]Loc
+	if down {
+		l, found = b.findDown(r, from, end)
+		if !found {
+			l, found = b.findDown(r, start, from)
+		}
+	} else {
+		l, found = b.findUp(r, from, start)
+		if !found {
+			l, found = b.findUp(r, end, from)
+		}
+	}
+	return l, found, nil
+}
+
+// ReplaceRegex replaces all occurrences of 'search' with 'replace' in the given area
+// and returns the number of replacements made
+func (b *Buffer) ReplaceRegex(start, end Loc, search *regexp.Regexp, replace []byte) int {
+	if start.GreaterThan(end) {
+		start, end = end, start
+	}
+
+	found := 0
+	var deltas []Delta
+	for i := start.Y; i <= end.Y; i++ {
+		l := b.lines[i].data
+		charpos := 0
+
+		if start.Y == end.Y && i == start.Y {
+			l = util.SliceStart(l, end.X)
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		} else if i == start.Y {
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		} else if i == end.Y {
+			l = util.SliceStart(l, end.X)
+		}
+		newText := search.ReplaceAllFunc(l, func(in []byte) []byte {
+			found++
+			return replace
+		})
+
+		from := Loc{charpos, i}
+		to := Loc{charpos + utf8.RuneCount(l), i}
+
+		deltas = append(deltas, Delta{newText, from, to})
+	}
+	b.MultipleReplace(deltas)
+
+	return found
+}

internal/buffer/serialize.go

@@ -0,0 +1,76 @@
+package buffer
+
+import (
+	"encoding/gob"
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+	"time"
+
+	"golang.org/x/text/encoding"
+
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/util"
+)
+
+// The SerializedBuffer holds the types that get serialized when a buffer is saved
+// These are used for the savecursor and saveundo options
+type SerializedBuffer struct {
+	EventHandler *EventHandler
+	Cursor       Loc
+	ModTime      time.Time
+}
+
+// Serialize serializes the buffer to config.ConfigDir/buffers
+func (b *Buffer) Serialize() error {
+	if !b.Settings["savecursor"].(bool) && !b.Settings["saveundo"].(bool) {
+		return nil
+	}
+	if b.Path == "" {
+		return nil
+	}
+
+	name := config.ConfigDir + "/buffers/" + util.EscapePath(b.AbsPath)
+
+	return overwriteFile(name, encoding.Nop, func(file io.Writer) error {
+		err := gob.NewEncoder(file).Encode(SerializedBuffer{
+			b.EventHandler,
+			b.GetActiveCursor().Loc,
+			b.ModTime,
+		})
+		return err
+	}, false)
+}
+
+// Unserialize loads the buffer info from config.ConfigDir/buffers
+func (b *Buffer) Unserialize() error {
+	// If either savecursor or saveundo is turned on, we need to load the serialized information
+	// from ~/.config/micro/buffers
+	if b.Path == "" {
+		return nil
+	}
+	file, err := os.Open(filepath.Join(config.ConfigDir, "buffers", util.EscapePath(b.AbsPath)))
+	defer file.Close()
+	if err == nil {
+		var buffer SerializedBuffer
+		decoder := gob.NewDecoder(file)
+		err = decoder.Decode(&buffer)
+		if err != nil {
+			return errors.New(err.Error() + "\nYou may want to remove the files in ~/.config/micro/buffers (these files\nstore the information for the 'saveundo' and 'savecursor' options) if\nthis problem persists.\nThis may be caused by upgrading to version 2.0, and removing the 'buffers'\ndirectory will reset the cursor and undo history and solve the problem.")
+		}
+		if b.Settings["savecursor"].(bool) {
+			b.StartCursor = buffer.Cursor
+		}
+
+		if b.Settings["saveundo"].(bool) {
+			// We should only use last time's eventhandler if the file wasn't modified by someone else in the meantime
+			if b.ModTime == buffer.ModTime {
+				b.EventHandler = buffer.EventHandler
+				b.EventHandler.cursors = b.cursors
+				b.EventHandler.buf = b.SharedBuffer
+			}
+		}
+	}
+	return nil
+}

internal/buffer/settings.go

@@ -0,0 +1,57 @@
+package buffer
+
+import (
+	"github.com/zyedidia/micro/internal/config"
+	"github.com/zyedidia/micro/internal/screen"
+)
+
+func (b *Buffer) SetOptionNative(option string, nativeValue interface{}) error {
+	b.Settings[option] = nativeValue
+
+	if option == "fastdirty" {
+		if !nativeValue.(bool) {
+			e := calcHash(b, &b.origHash)
+			if e == ErrFileTooLarge {
+				b.Settings["fastdirty"] = false
+			}
+		}
+	} else if option == "statusline" {
+		screen.Redraw()
+	} else if option == "filetype" {
+		b.UpdateRules()
+	} else if option == "fileformat" {
+		switch b.Settings["fileformat"].(string) {
+		case "unix":
+			b.Endings = FFUnix
+		case "dos":
+			b.Endings = FFDos
+		}
+		b.isModified = true
+	} else if option == "syntax" {
+		if !nativeValue.(bool) {
+			b.ClearMatches()
+		} else {
+			b.UpdateRules()
+		}
+	} else if option == "encoding" {
+		b.isModified = true
+	} else if option == "readonly" && b.Type.Kind == BTDefault.Kind {
+		b.Type.Readonly = nativeValue.(bool)
+	}
+
+	return nil
+}
+
+// SetOption sets a given option to a value just for this buffer
+func (b *Buffer) SetOption(option, value string) error {
+	if _, ok := b.Settings[option]; !ok {
+		return config.ErrInvalidOption
+	}
+
+	nativeValue, err := config.GetNativeValue(option, b.Settings[option], value)
+	if err != nil {
+		return err
+	}
+
+	return b.SetOptionNative(option, nativeValue)
+}

internal/buffer/stack.go

@@ -1,7 +1,7 @@
-package main
+package buffer
 
-// Stack is a simple implementation of a LIFO stack for text events
-type Stack struct {
+// TEStack is a simple implementation of a LIFO stack for text events
+type TEStack struct {
 	Top  *Element
 	Size int
 }
@@ -13,19 +13,19 @@ type Element struct {
 }
 
 // Len returns the stack's length
-func (s *Stack) Len() int {
+func (s *TEStack) Len() int {
 	return s.Size
 }
 
 // Push a new element onto the stack
-func (s *Stack) Push(value *TextEvent) {
+func (s *TEStack) Push(value *TextEvent) {
 	s.Top = &Element{value, s.Top}
 	s.Size++
 }
 
 // Pop removes the top element from the stack and returns its value
 // If the stack is empty, return nil
-func (s *Stack) Pop() (value *TextEvent) {
+func (s *TEStack) Pop() (value *TextEvent) {
 	if s.Size > 0 {
 		value, s.Top = s.Top.Value, s.Top.Next
 		s.Size--
@@ -35,7 +35,7 @@ func (s *Stack) Pop() (value *TextEvent) {
 }
 
 // Peek returns the top element of the stack without removing it
-func (s *Stack) Peek() *TextEvent {
+func (s *TEStack) Peek() *TextEvent {
 	if s.Size > 0 {
 		return s.Top.Value
 	}