terminal: improve mouse support

Improve terminal mouse support by forwarding mouse events to the
terminal widget. Clicking and dragging are supported.

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>

CHANGELOG.md

@@ -28,6 +28,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   be sent. The output will be stored until aerc is shut down. This behaviour
   can be disabled by setting `outgoing-cred-cmd-cache=false` in
   `accounts.conf`.
+- Mouse support for embedded editors when `mouse-enabled=true`.
 
 ## [0.12.0](https://git.sr.ht/~rjarry/aerc/refs/0.12.0) - 2022-09-01
 

widgets/aerc.go

@@ -348,9 +348,6 @@ func (aerc *Aerc) Event(event tcell.Event) bool {
 			return false
 		}
 	case *tcell.EventMouse:
-		if event.Buttons() == tcell.ButtonNone {
-			return false
-		}
 		x, y := event.Position()
 		aerc.grid.MouseEvent(x, y, event)
 		return true

widgets/terminal.go

@@ -140,16 +140,18 @@ func (term *Terminal) draw() {
 }
 
 func (term *Terminal) MouseEvent(localX int, localY int, event tcell.Event) {
-	if event, ok := event.(*tcell.EventMouse); ok {
-		if term.OnEvent != nil {
-			if term.OnEvent(event) {
+	ev, ok := event.(*tcell.EventMouse)
+	if !ok {
 		return
 	}
+	if term.OnEvent != nil {
+		term.OnEvent(ev)
 	}
 	if term.closed {
 		return
 	}
-	}
+	e := tcell.NewEventMouse(localX, localY, ev.Buttons(), ev.Modifiers())
+	term.vterm.HandleEvent(e)
 }
 
 func (term *Terminal) Focus(focus bool) {