Comment 97 for bug 134813

Hello,

I have been spending some time figuring out this issue and deduced the following. My opinion is that the "simulated right-click" happens a few pixels too low.

The events happen like this:

- The native back-end (e.g. GTK) is receiving a KeyPressEvent. If the "Context Menu" key is pressed, it will convert this into a nsMouseEvent, with coordinates (0,0) and the context type nsMouseEvent::eContextMenuKey (mozilla/widget/src/gtk2/nsWindow.cpp @ 3296)
- As the event propagates, nsEventListenerManager::FixContextMenuEvent() is called, which sets the coordinates to that of the caret, using PrepareToUseCaretPosition (mozilla/content/events/src/nsEventListenerManager.cpp @ 1422)

I doubt that the nsCaret's coordinates are wrong (else this might also create weird drawing artifacts), so I think the problem is related to how PrepareToUseCaretPosition processes this value.

I haven't got any more energy to study this, so it would be really cool if somebody could take over.