Add bracket surround

cmd/micro/actions.go

@@ -1852,6 +1852,68 @@ func (v *View) PreviousSplit(usePlugin bool) bool {
 	return false
 }
 
+func (v *View) WrapBracket(usePlugin bool) bool {
+	if v.Cursor.HasSelection() {
+		lockPollEvent = true
+		event := screen.PollEvent()
+		lockPollEvent = false
+
+		ev, ok := event.(*tcell.EventKey)
+		if !ok {
+			return false
+		}
+		if !strings.Contains("()[]{}\"'", string(ev.Rune())) {
+			return false
+		}
+		start := v.Cursor.CurSelection[0]
+		end := v.Cursor.CurSelection[1]
+		if start.Y != end.Y {
+			return false
+		}
+
+		close := map[string]string{
+			")":  ")",
+			"]":  "]",
+			"}":  "}",
+			"(":  ")",
+			"[":  "]",
+			"{":  "}",
+			"\"": "\"",
+			"'":  "'",
+		}
+
+		open := map[string]string{
+			")":  "(",
+			"]":  "[",
+			"}":  "{",
+			"(":  "(",
+			"[":  "[",
+			"{":  "{",
+			"\"": "\"",
+			"'":  "'",
+		}
+
+		if usePlugin && !PreActionCall("WrapBracket", v) {
+			return false
+		}
+		r := string(ev.Rune())
+		if start.GreaterThan(end) {
+			start, end = end, start
+			v.Buf.Insert(start, open[r])
+			v.Buf.Insert(end.Move(1, v.Buf), close[r])
+			v.Cursor.CurSelection[1] = start
+		} else {
+			v.Buf.Insert(start, open[r])
+			v.Buf.Insert(end.Move(1, v.Buf), close[r])
+			v.Cursor.CurSelection[0] = start
+		}
+		if usePlugin {
+			return PostActionCall("WrapBracket", v)
+		}
+	}
+	return false
+}
+
 var curMacro []interface{}
 var recordingMacro bool
 

cmd/micro/bindings.go

@@ -69,6 +69,7 @@ var bindingActions = map[string]func(*View, bool) bool{
 	"PastePrimary":          (*View).PastePrimary,
 	"SelectAll":             (*View).SelectAll,
 	"OpenFile":              (*View).OpenFile,
+	"WrapBracket":           (*View).WrapBracket,
 	"Start":                 (*View).Start,
 	"End":                   (*View).End,
 	"PageUp":                (*View).PageUp,
@@ -438,6 +439,7 @@ func DefaultBindings() map[string]string {
 		"Down":           "CursorDown",
 		"Right":          "CursorRight",
 		"Left":           "CursorLeft",
+		"Alt-j":          "WrapBracket",
 		"ShiftUp":        "SelectUp",
 		"ShiftDown":      "SelectDown",
 		"ShiftLeft":      "SelectLeft",

cmd/micro/micro.go

@@ -59,6 +59,9 @@ var (
 	// Event channel
 	events   chan tcell.Event
 	autosave chan bool
+
+	// Read events on another thread or wait for a temporary read
+	lockPollEvent bool
 )
 
 // LoadInput determines which files should be loaded into buffers
@@ -419,8 +422,9 @@ func main() {
 	// Here is the event loop which runs in a separate thread
 	go func() {
 		for {
-			if screen != nil {
+			if screen != nil && !lockPollEvent {
 				events <- screen.PollEvent()
+				time.Sleep(1 * time.Millisecond)
 			}
 		}
 	}()