Merge branch 'gutter-messages'

cmd/micro/messenger.go

@@ -56,6 +56,9 @@ type Messenger struct {
 
 	// We have to keep track of the cursor for prompting
 	cursorx int
+
+	// Is the current message a message from the gutter
+	gutterMessage bool
 }
 
 // Message sends a message to the user
@@ -208,3 +211,20 @@ func (m *Messenger) Display() {
 		screen.Show()
 	}
 }
+
+// A GutterMessage is a message displayed on the side of the editor
+type GutterMessage struct {
+	lineNum int
+	msg     string
+	kind    int
+}
+
+// These are the different types of messages
+const (
+	// GutterInfo represents a simple info message
+	GutterInfo = iota
+	// GutterWarning represents a compiler warning
+	GutterWarning
+	// GutterError represents a compiler error
+	GutterError
+)

cmd/micro/view.go

@@ -34,6 +34,8 @@ type View struct {
 	// The eventhandler for undo/redo
 	eh *EventHandler
 
+	messages []GutterMessage
+
 	// The buffer
 	buf *Buffer
 	// The statusline
@@ -360,6 +362,21 @@ func (v *View) HandleEvent(event tcell.Event) {
 	}
 }
 
+// GutterMessage creates a message in this view's gutter
+func (v *View) GutterMessage(lineN int, msg string, kind int) {
+	gutterMsg := GutterMessage{
+		lineNum: lineN,
+		msg:     msg,
+		kind:    kind,
+	}
+	for _, gmsg := range v.messages {
+		if gmsg.lineNum == lineN {
+			return
+		}
+	}
+	v.messages = append(v.messages, gutterMsg)
+}
+
 // DisplayView renders the view to the screen
 func (v *View) DisplayView() {
 	// The character number of the character in the top left of the screen
@@ -376,6 +393,10 @@ func (v *View) DisplayView() {
 	}
 	var highlightStyle tcell.Style
 
+	if len(v.messages) > 0 {
+		v.lineNumOffset += 2
+	}
+
 	for lineN := 0; lineN < v.height; lineN++ {
 		var x int
 		// If the buffer is smaller than the view height
@@ -385,6 +406,48 @@ func (v *View) DisplayView() {
 		}
 		line := v.buf.lines[lineN+v.topline]
 
+		if len(v.messages) > 0 {
+			msgOnLine := false
+			for _, msg := range v.messages {
+				if msg.lineNum == lineN+v.topline {
+					msgOnLine = true
+					gutterStyle := tcell.StyleDefault
+					switch msg.kind {
+					case GutterInfo:
+						if style, ok := colorscheme["gutter-info"]; ok {
+							gutterStyle = style
+						}
+					case GutterWarning:
+						if style, ok := colorscheme["gutter-warning"]; ok {
+							gutterStyle = style
+						}
+					case GutterError:
+						if style, ok := colorscheme["gutter-error"]; ok {
+							gutterStyle = style
+						}
+					}
+					screen.SetContent(x, lineN, '>', nil, gutterStyle)
+					x++
+					screen.SetContent(x, lineN, '>', nil, gutterStyle)
+					x++
+					if v.cursor.y == lineN {
+						messenger.Message(msg.msg)
+						messenger.gutterMessage = true
+					}
+				}
+			}
+			if !msgOnLine {
+				screen.SetContent(x, lineN, ' ', nil, tcell.StyleDefault)
+				x++
+				screen.SetContent(x, lineN, ' ', nil, tcell.StyleDefault)
+				x++
+				if v.cursor.y == lineN && messenger.gutterMessage {
+					messenger.Reset()
+					messenger.gutterMessage = false
+				}
+			}
+		}
+
 		// Write the line number
 		lineNumStyle := defStyle
 		if style, ok := colorscheme["line-number"]; ok {