First attempt at resizable panes

cmd/micro/actions.go

@@ -62,54 +62,71 @@ func (v *View) MousePress(usePlugin bool, e *tcell.EventMouse) bool {
 		return false
 	}
 
-	x, y := e.Position()
-	x -= v.lineNumOffset - v.leftCol + v.x
-	y += v.Topline - v.y
+	rawX, rawY := e.Position()
+
+	x := rawX - v.lineNumOffset - v.leftCol + v.x
+	y := rawY + v.Topline - v.y
 
 	// This is usually bound to left click
-	v.MoveToMouseClick(x, y)
+	if !(rawX == v.x+v.Width || rawY == v.y+v.Height || v.resizeX || v.resizeY) {
+		v.MoveToMouseClick(x, y)
+	}
 	if v.mouseReleased {
-		if len(v.Buf.cursors) > 1 {
-			for i := 1; i < len(v.Buf.cursors); i++ {
-				v.Buf.cursors[i] = nil
-			}
-			v.Buf.cursors = v.Buf.cursors[:1]
-			v.Buf.UpdateCursors()
-			v.Cursor.ResetSelection()
-			v.Relocate()
-		}
-		if time.Since(v.lastClickTime)/time.Millisecond < doubleClickThreshold {
-			if v.doubleClick {
-				// Triple click
-				v.lastClickTime = time.Now()
-
-				v.tripleClick = true
-				v.doubleClick = false
-
-				v.Cursor.SelectLine()
-				v.Cursor.CopySelection("primary")
-			} else {
-				// Double click
-				v.lastClickTime = time.Now()
-
-				v.doubleClick = true
-				v.tripleClick = false
-
-				v.Cursor.SelectWord()
-				v.Cursor.CopySelection("primary")
-			}
+		if rawX == v.x+v.Width {
+			v.resizeX = true
+		} else if rawY == v.y+v.Height {
+			v.resizeY = true
 		} else {
-			v.doubleClick = false
-			v.tripleClick = false
-			v.lastClickTime = time.Now()
+			if len(v.Buf.cursors) > 1 {
+				for i := 1; i < len(v.Buf.cursors); i++ {
+					v.Buf.cursors[i] = nil
+				}
+				v.Buf.cursors = v.Buf.cursors[:1]
+				v.Buf.UpdateCursors()
+				v.Cursor.ResetSelection()
+				v.Relocate()
+			}
+			if time.Since(v.lastClickTime)/time.Millisecond < doubleClickThreshold {
+				if v.doubleClick {
+					// Triple click
+					v.lastClickTime = time.Now()
 
-			v.Cursor.OrigSelection[0] = v.Cursor.Loc
-			v.Cursor.CurSelection[0] = v.Cursor.Loc
-			v.Cursor.CurSelection[1] = v.Cursor.Loc
+					v.tripleClick = true
+					v.doubleClick = false
+
+					v.Cursor.SelectLine()
+					v.Cursor.CopySelection("primary")
+				} else {
+					// Double click
+					v.lastClickTime = time.Now()
+
+					v.doubleClick = true
+					v.tripleClick = false
+
+					v.Cursor.SelectWord()
+					v.Cursor.CopySelection("primary")
+				}
+			} else {
+				v.doubleClick = false
+				v.tripleClick = false
+				v.lastClickTime = time.Now()
+
+				v.Cursor.OrigSelection[0] = v.Cursor.Loc
+				v.Cursor.CurSelection[0] = v.Cursor.Loc
+				v.Cursor.CurSelection[1] = v.Cursor.Loc
+			}
 		}
 		v.mouseReleased = false
 	} else if !v.mouseReleased {
-		if v.tripleClick {
+		if v.resizeX {
+			v.Width = rawX - v.x
+			v.LockWidth = true
+			v.splitNode.parent.ResizeSplits()
+		} else if v.resizeY {
+			v.Height = rawY - v.y
+			v.LockHeight = true
+			v.splitNode.parent.ResizeSplits()
+		} else if v.tripleClick {
 			v.Cursor.AddLineToSelection()
 		} else if v.doubleClick {
 			v.Cursor.AddWordToSelection()

cmd/micro/cellview.go

@@ -112,6 +112,9 @@ func (c *CellView) Draw(buf *Buffer, top, height, left, width int) {
 		// We'll either draw the length of the line, or the width of the screen
 		// whichever is smaller
 		lineLength := min(StringWidth(lineStr, tabsize), width)
+		if lineLength < 0 {
+			return
+		}
 		c.lines = append(c.lines, make([]*Char, lineLength))
 
 		wrap := false
@@ -133,38 +136,50 @@ func (c *CellView) Draw(buf *Buffer, top, height, left, width int) {
 			char := line[colN]
 
 			if viewCol >= 0 {
-				c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, char, curStyle, 1}
+				if viewCol < len(c.lines[viewLine]) {
+					c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, char, curStyle, 1}
+				}
 			}
 			if char == '\t' {
 				charWidth := tabsize - (viewCol+left)%tabsize
 				if viewCol >= 0 {
-					c.lines[viewLine][viewCol].drawChar = indentchar
-					c.lines[viewLine][viewCol].width = charWidth
+					if viewCol < len(c.lines[viewLine]) {
+						c.lines[viewLine][viewCol].drawChar = indentchar
+						c.lines[viewLine][viewCol].width = charWidth
+					}
 
 					indentStyle := curStyle
 					if group, ok := colorscheme["indent-char"]; ok {
 						indentStyle = group
 					}
 
-					c.lines[viewLine][viewCol].style = indentStyle
+					if viewCol < len(c.lines[viewLine]) {
+						c.lines[viewLine][viewCol].style = indentStyle
+					}
 				}
 
 				for i := 1; i < charWidth; i++ {
 					viewCol++
 					if viewCol >= 0 && viewCol < lineLength {
-						c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, ' ', curStyle, 1}
+						if 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
+					if viewCol < len(c.lines[viewLine]) {
+						c.lines[viewLine][viewCol].width = charWidth
+					}
 				}
 				for i := 1; i < charWidth; i++ {
 					viewCol++
 					if viewCol >= 0 && viewCol < lineLength {
-						c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, ' ', curStyle, 1}
+						if viewCol < len(c.lines[viewLine]) {
+							c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, ' ', curStyle, 1}
+						}
 					}
 				}
 				viewCol++

cmd/micro/micro.go

@@ -143,6 +143,15 @@ func InitConfigDir() {
 	}
 	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)
@@ -240,19 +249,24 @@ func LoadAll() {
 // Passing -version as a flag will have micro print out the version number
 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 optionFlagSet = flag.NewFlagSet("option", flag.ExitOnError)
 
 func main() {
 	flag.Usage = func() {
 		fmt.Println("Usage: micro [OPTIONS] [FILE]...")
-		fmt.Print("Micro's options can be set via command line arguments for quick adjustments. For real configuration, please use the bindings.json file (see 'help options').\n\n")
 		flag.CommandLine.SetOutput(os.Stdout)
 		flag.PrintDefaults()
+		optionFlagSet.SetOutput(os.Stdout)
+		fmt.Print("\n------------------------------------------------------------------\n")
+		fmt.Print("Micro's options can also be set via command line arguments for quick\nadjustments. For real configuration, please use the bindings.json\nfile (see 'help options').\n\n")
+		optionFlagSet.PrintDefaults()
 	}
 
 	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))
+		optionFlags[k] = optionFlagSet.String(k, "", fmt.Sprintf("The %s option. Default value: '%v'", k, v))
 	}
 
 	flag.Parse()
@@ -462,7 +476,7 @@ func main() {
 							// 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 {
+								if x > v.x && x <= v.x+v.Width && y > v.y && y <= v.y+v.Height {
 									tabs[curTab].CurView = v.Num
 								}
 							}

cmd/micro/view.go

@@ -91,6 +91,9 @@ type View struct {
 	cellview *CellView
 
 	splitNode *LeafNode
+
+	resizeX bool
+	resizeY bool
 }
 
 // NewView returns a new fullscreen view
@@ -599,21 +602,26 @@ func (v *View) HandleEvent(event tcell.Event) {
 			// Mouse event with no click
 			if !v.mouseReleased {
 				// Mouse was just released
+				if v.resizeX || v.resizeY {
+					v.resizeX = false
+					v.resizeY = false
+				} else {
 
-				x, y := e.Position()
-				x -= v.lineNumOffset - v.leftCol + v.x
-				y += v.Topline - v.y
+					x, y := e.Position()
+					x -= v.lineNumOffset - v.leftCol + v.x
+					y += v.Topline - v.y
 
-				// 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
+					// 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 !v.doubleClick && !v.tripleClick {
-					v.MoveToMouseClick(x, y)
-					v.Cursor.SetSelectionEnd(v.Cursor.Loc)
-					v.Cursor.CopySelection("primary")
+					if !v.doubleClick && !v.tripleClick {
+						v.MoveToMouseClick(x, y)
+						v.Cursor.SetSelectionEnd(v.Cursor.Loc)
+						v.Cursor.CopySelection("primary")
+					}
 				}
 				v.mouseReleased = true
 			}

runtime/help/plugins.md

@@ -147,14 +147,17 @@ The possible methods which you can call using the `messenger` variable are:
 * `messenger.AddLog(msg ...interface{})`
 
 ## Note 
-`golang` function signatures use `.` and lua uses `:` so
+Go function signatures use `.` and lua uses `:` so
+
 ```go
 messenger.Message()
 ```
- turns to
- ```lua
- messenger:Message()
- ```
+
+turns to
+
+```lua
+messenger:Message()
+```
 
 If you want a standard prompt, just use
 ```lua
@@ -165,9 +168,38 @@ Debug or logging your plugin can be done with below lua example code.
 ```lua
 messenger:AddLog("Message goes here ",pluginVariableToPrintHere)
 ```
-In Micro Editor to see your plugin logging output press `ctrl E` then type `log`
+
+In Micro to see your plugin logging output press `CtrlE` then type `log`
 A logging window will open and any logging sent from your plugin will be displayed here.
 
+# Accessing the Go standard library
+
+It is possible for your lua code to access many of the functions in the Go standard library.
+
+Simply import the package you'd like and then you can use it. For example:
+
+```lua
+local ioutil = import("ioutil")
+local fmt = import("fmt")
+
+local data, err = ioutil.ReadFile("SomeFile.txt")
+
+if err ~= nil then
+    messenger:Error("Error reading file: SomeFile.txt")
+else
+    -- Data is returned as an array of bytes
+    -- Using Sprintf will convert it to a string
+    local str = fmt.Sprintf("%s", data)
+
+    -- Do something with the file you just read!
+    -- ...
+end
+```
+
+For a full list of which packages and functions from the standard library
+you can access, look at `lua.go` in the source code (it shouldn't be
+too hard to look through).
+
 # Adding help files, syntax files, or colorschemes in your plugin
 
 You can use the `AddRuntimeFile(name, type, path string)` function to add various kinds of