Summary:
When a CSD button interaction under wayland leads to a compositor action
like move or resize, we essentially "give back" that button press to the
compositor, and it never sends us a mouse up for it.
We need to internally fire a mouse up event to fix up state so the client
doesn't think the mouse is still down. Until now we've been doing this
by setting a flag when we start a move/resize and checking it at next
pointer enter for the window.
This leads to unsolvable races and wacky bookkeeping, and runs afoul of
the fact that we're not actually guaranteed a pointer enter immediately
after a move completes. There is absolutely no way at all on wayland to
know if a move or resize operation has completed.
So, let's just fire the mouse up immediately on start of interaction,
which is raceless.
This fixes a years old bug where dragging a window might leave a stuck
mouse up, and allow hilighting text without drag after the window drag
completes. (elementary-test -to "text editor" with multiple windows open
exhibits this bug)
Depends on D6127
Reviewers: zmike, cedric
Reviewed By: zmike
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D6128
ed60eddff5