feat(vt): handle hyperlinks (OSC 8)

vt/cursor.go

@@ -12,7 +12,8 @@ const (
 
 // Cursor represents a cursor in a terminal.
 type Cursor struct {
-	Pen Style
+	Pen  Style
+	Link Link
 
 	Position
 

vt/handlers.go

@@ -159,6 +159,12 @@ func (t *Terminal) registerDefaultOscHandlers() {
 		})
 	}
 
+	t.RegisterOscHandler(8, func(data []byte) bool {
+		// Set/Query Hyperlink [ansi.SetHyperlink]
+		t.handleHyperlink(8, data)
+		return true
+	})
+
 	for _, cmd := range []int{
 		10,  // Set/Query foreground color
 		11,  // Set/Query background color

vt/osc.go

@@ -104,3 +104,14 @@ func (t *Terminal) handleDefaultColor(cmd int, data []byte) {
 
 	setCol(col)
 }
+
+func (t *Terminal) handleHyperlink(cmd int, data []byte) {
+	parts := bytes.Split(data, []byte{';'})
+	if len(parts) != 3 || cmd != 8 {
+		// Invalid, ignore
+		return
+	}
+
+	t.scr.cur.Link.URL = string(parts[1])
+	t.scr.cur.Link.URLID = string(parts[2])
+}

vt/screen.go

@@ -279,6 +279,13 @@ func (s *Screen) cursorPen() Style {
 	return s.cur.Pen
 }
 
+// cursorLink returns the cursor link.
+func (s *Screen) cursorLink() Link {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.cur.Link
+}
+
 // ShowCursor shows the cursor.
 func (s *Screen) ShowCursor() {
 	s.setCursorHidden(false)

vt/utf8.go

@@ -64,7 +64,7 @@ func (t *Terminal) handleGrapheme(content string, width int) {
 	}
 
 	cell.Style = t.scr.cursorPen()
-	cell.Link = Link{} // TODO: Link support
+	cell.Link = t.scr.cursorLink()
 
 	if t.scr.SetCell(x, y, cell) {
 		if width == 1 && len(content) == 1 {