Add JumpToMatchingBrace action

This commit adds the JumpToMatchingBrace action which lets the cursor
jump to a matching brace if it is on one.

Closes #853

cmd/micro/actions.go

@@ -1357,6 +1357,27 @@ func (v *View) PastePrimary(usePlugin bool) bool {
 	return true
 }
 
+// JumpToMatchingBrace moves the cursor to the matching brace if it is
+// currently on a brace
+func (v *View) JumpToMatchingBrace(usePlugin bool) bool {
+	if usePlugin && !PreActionCall("JumpToMatchingBrace", v) {
+		return false
+	}
+
+	for _, bp := range bracePairs {
+		r := v.Cursor.RuneUnder(v.Cursor.X)
+		if r == bp[0] || r == bp[1] {
+			matchingBrace := v.Buf.FindMatchingBrace(bp, v.Cursor.Loc)
+			v.Cursor.GotoLoc(matchingBrace)
+		}
+	}
+
+	if usePlugin {
+		return PostActionCall("JumpToMatchingBrace", v)
+	}
+	return true
+}
+
 // SelectAll selects the entire buffer
 func (v *View) SelectAll(usePlugin bool) bool {
 	if usePlugin && !PreActionCall("SelectAll", v) {

cmd/micro/bindings.go

@@ -111,6 +111,7 @@ var bindingActions = map[string]func(*View, bool) bool{
 	"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,

cmd/micro/cellview.go

@@ -150,7 +150,6 @@ func (c *CellView) Draw(buf *Buffer, top, height, left, width int) {
 			if viewCol >= 0 {
 				st := curStyle
 				if colN == matchingBrace.X && lineN == matchingBrace.Y {
-					messenger.Message(matchingBrace)
 					st = curStyle.Reverse(true)
 				}
 				c.lines[viewLine][viewCol] = &Char{Loc{viewCol, viewLine}, Loc{colN, lineN}, char, char, st, 1}

cmd/micro/cursor.go

@@ -35,6 +35,13 @@ func (c *Cursor) Goto(b Cursor) {
 	c.OrigSelection, c.CurSelection = b.OrigSelection, b.CurSelection
 }
 
+// GotoLoc puts the cursor at the given cursor's location and gives
+// the current cursor its selection too
+func (c *Cursor) GotoLoc(l Loc) {
+	c.X, c.Y = l.X, l.Y
+	c.LastVisualX = c.GetVisualX()
+}
+
 // CopySelection copies the user's selection to either "primary"
 // or "clipboard"
 func (c *Cursor) CopySelection(target string) {

runtime/help/keybindings.md

@@ -218,6 +218,7 @@ RemoveMultiCursor
 RemoveAllMultiCursors
 SkipMultiCursor
 UnbindKey
+JumpToMatchingBrace
 ```
 
 You can also bind some mouse actions (these must be bound to mouse buttons)

runtime/help/options.md

@@ -182,6 +182,10 @@ Here are the options that you can set:
 
 	default value: `on`
 
+* `matchbrace`: highlight matching braces for '()', '{}', '[]'
+
+    default value: `off`
+
 * `syntax`: turns syntax on or off.
 
 	default value: `on`