Change project layout and use go.mod

internal/info/infobuffer.go

@@ -0,0 +1,161 @@
+package info
+
+import (
+	"fmt"
+
+	"github.com/zyedidia/micro/internal/buffer"
+)
+
+// The InfoBuf displays messages and other info at the bottom of the screen.
+// It is respresented as a buffer and a message with a style.
+type InfoBuf struct {
+	*buffer.Buffer
+
+	HasPrompt  bool
+	HasMessage bool
+	HasError   bool
+	HasYN      bool
+
+	PromptType string
+
+	Msg    string
+	YNResp bool
+
+	// 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
+	HasGutter bool
+
+	PromptCallback func(resp string, canceled bool)
+	EventCallback  func(resp string)
+	YNCallback     func(yes bool, canceled bool)
+}
+
+// NewBuffer returns a new infobuffer
+func NewBuffer() *InfoBuf {
+	ib := new(InfoBuf)
+	ib.History = make(map[string][]string)
+
+	ib.Buffer = buffer.NewBufferFromString("", "infobar", buffer.BTInfo)
+	ib.LoadHistory()
+
+	return ib
+}
+
+// Close performs any cleanup necessary when shutting down the infobuffer
+func (i *InfoBuf) Close() {
+	i.SaveHistory()
+}
+
+// Message sends a message to the user
+func (i *InfoBuf) Message(msg ...interface{}) {
+	// only display a new message if there isn't an active prompt
+	// this is to prevent overwriting an existing prompt to the user
+	if i.HasPrompt == false {
+		displayMessage := fmt.Sprint(msg...)
+		// if there is no active prompt then style and display the message as normal
+		i.Msg = displayMessage
+		i.HasMessage = true
+	}
+}
+
+// GutterMessage displays a message and marks it as a gutter message
+func (i *InfoBuf) GutterMessage(msg ...interface{}) {
+	i.Message(msg...)
+	i.HasGutter = true
+}
+
+// ClearGutter clears the info bar and unmarks the message
+func (i *InfoBuf) ClearGutter() {
+	i.HasGutter = false
+	i.Message("")
+}
+
+// Error sends an error message to the user
+func (i *InfoBuf) Error(msg ...interface{}) {
+	// only display a new message if there isn't an active prompt
+	// this is to prevent overwriting an existing prompt to the user
+	if i.HasPrompt == false {
+		// if there is no active prompt then style and display the message as normal
+		i.Msg = fmt.Sprint(msg...)
+		i.HasMessage, i.HasError = false, true
+	}
+	// TODO: add to log?
+}
+
+// Prompt starts a prompt for the user, it takes a prompt, a possibly partially filled in msg
+// and callbacks executed when the user executes an event and when the user finishes the prompt
+// The eventcb passes the current user response as the argument and donecb passes the user's message
+// and a boolean indicating if the prompt was canceled
+func (i *InfoBuf) Prompt(prompt string, msg string, ptype string, eventcb func(string), donecb func(string, bool)) {
+	// If we get another prompt mid-prompt we cancel the one getting overwritten
+	if i.HasPrompt {
+		i.DonePrompt(true)
+	}
+
+	if _, ok := i.History[ptype]; !ok {
+		i.History[ptype] = []string{""}
+	} else {
+		i.History[ptype] = append(i.History[ptype], "")
+	}
+	i.HistoryNum = len(i.History[ptype]) - 1
+
+	i.PromptType = ptype
+	i.Msg = prompt
+	i.HasPrompt = true
+	i.HasMessage, i.HasError, i.HasYN = false, false, false
+	i.HasGutter = false
+	i.PromptCallback = donecb
+	i.EventCallback = eventcb
+	i.Buffer.Insert(i.Buffer.Start(), msg)
+}
+
+func (i *InfoBuf) YNPrompt(prompt string, donecb func(bool, bool)) {
+	if i.HasPrompt {
+		i.DonePrompt(true)
+	}
+
+	i.Msg = prompt
+	i.HasPrompt = true
+	i.HasYN = true
+	i.HasMessage, i.HasError = false, false
+	i.HasGutter = false
+	i.YNCallback = donecb
+}
+
+// DonePrompt finishes the current prompt and indicates whether or not it was canceled
+func (i *InfoBuf) DonePrompt(canceled bool) {
+	hadYN := i.HasYN
+	i.HasPrompt = false
+	i.HasYN = false
+	i.HasGutter = false
+	if !hadYN {
+		if i.PromptCallback != nil {
+			if canceled {
+				i.PromptCallback("", true)
+				h := i.History[i.PromptType]
+				i.History[i.PromptType] = h[:len(h)-1]
+			} else {
+				resp := string(i.LineBytes(0))
+				i.PromptCallback(resp, false)
+				h := i.History[i.PromptType]
+				h[len(h)-1] = resp
+			}
+			i.PromptCallback = nil
+		}
+		i.Replace(i.Start(), i.End(), "")
+	}
+	if i.YNCallback != nil && hadYN {
+		i.YNCallback(i.YNResp, canceled)
+	}
+}
+
+// Reset resets the infobuffer's msg and info
+func (i *InfoBuf) Reset() {
+	i.Msg = ""
+	i.HasPrompt, i.HasMessage, i.HasError = false, false, false
+	i.HasGutter = false
+}