Reorganize info bar

cmd/micro/info/infobuffer.go

@@ -0,0 +1,91 @@
+package info
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/zyedidia/micro/cmd/micro/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
+
+	Msg string
+
+	// 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
+
+	PromptCallback func(resp string, canceled bool)
+}
+
+func NewBuffer() *InfoBuf {
+	ib := new(InfoBuf)
+	ib.History = make(map[string][]string)
+
+	ib.Buffer = buffer.NewBufferFromString("", "infobar", buffer.BTInfo)
+
+	return ib
+}
+
+// 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
+	}
+}
+
+// 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?
+}
+
+func (i *InfoBuf) Prompt(msg string, callback func(string, bool)) {
+	// If we get another prompt mid-prompt we cancel the one getting overwritten
+	if i.HasPrompt {
+		i.DonePrompt(true)
+	}
+
+	i.Msg = msg
+	i.HasPrompt = true
+	i.HasMessage, i.HasError = false, false
+	i.PromptCallback = callback
+}
+
+func (i *InfoBuf) DonePrompt(canceled bool) {
+	i.HasPrompt = false
+	if canceled {
+		i.PromptCallback("", true)
+	} else {
+		i.PromptCallback(strings.TrimSpace(string(i.LineBytes(0))), false)
+	}
+	i.Replace(i.Start(), i.End(), "")
+}
+
+// Reset resets the messenger's cursor, message and response
+func (i *InfoBuf) Reset() {
+	i.Msg = ""
+	i.HasPrompt, i.HasMessage, i.HasError = false, false, false
+}