Compiz

Merge lp://staging/~banw/compiz/compiz.a11y-shotcuts into lp://staging/compiz/0.9.13

compiz.a11y-shotcuts
Merge into 0.9.13

Proposed by Colomban Wendling on 2017-03-16

Status:

Needs review

Proposed branch:

lp://staging/~banw/compiz/compiz.a11y-shotcuts

Merge into:

lp://staging/compiz/0.9.13

Diff against target:

1045 lines (+586/-41)

12 files modified

include/core/action.h (+3/-0)
include/core/screen.h (+1/-0)
plugins/ezoom/src/ezoom.cpp (+6/-0)
plugins/neg/src/neg.cpp (+5/-0)
plugins/showmouse/src/showmouse.cpp (+6/-0)
src/action.cpp (+37/-21)
src/event.cpp (+328/-15)
src/eventmanagement.h (+2/-0)
src/privateaction.h (+2/-0)
src/privatescreen.h (+11/-0)
src/screen.cpp (+136/-5)
src/window.cpp (+49/-0)

To merge this branch:

bzr merge lp://staging/~banw/compiz/compiz.a11y-shotcuts

Undecided

New

Link a bug report

Reviewer	Review Type	Date Requested	Status
Andrea Azzarone		2017-03-16	Pending
Review via email: mp+320091@code.staging.launchpad.net

Description of the change

This is an attempt at solving https://bugs.launchpad.net/compiz/+bug/1653072

The current state is still WIP, but I'd like general opinion, and specific comments on how to fix some parts.

This uses XI2 Raw events to get mouse and keyboard events during active grabs (menus, etc.). Actions need be configured to use those, so it's opt-in.

I initially tried XI2 "normal" events, which include all possibly useful context, but simply listening to those prevent Core events from being dispatched on the window, so it would require using XI2 *only*, which sounds like a large change -- and even then, grabs might affect these too (on Master Devices?), I'm not 100% sure of how this works.

See the FIXMEs and alike in the code for the area that need attention and possibly a fix.

Revision history for this message

Samuel thibault (samuel-thibault) wrote on 2017-09-19:

Yes, normal XI2 event are very probably affected by grabs, and so AIUI raw events are the only way.

I have commented along the patch. Overall the approach seems sound to me.

Revision history for this message

Samuel thibault (samuel-thibault) wrote on 2017-10-23:

Checking things again, it seems XI2 normal events are not affected by grabs, or
at least the ones I have tried: inside gtk3 menus and in screen saver

I can confirm that listening to XI2 normal events prevents core events from
being delivered, but that's only for compiz for the windows not created by
compiz, so it's not a problem for other applications. For compiz itself, I don't
think it is a problem that core events are not delivered any more: once XI2 is
enabled, I don't see a reason for doing anything with the core events (on the
contrary, that would lead to duplicates), so their processing could just be
disabled in that case. Was it only needed so as to detect whether grabbing was
enabled or not? That can be detected more easily with FocusIn/Out with mode
NotifyGrab/Ungrab.

I'll try to rework the solution with XI2 normal events only.

Revision history for this message

Samuel thibault (samuel-thibault) wrote on 2017-11-07:

I have finished reworking it, pushed to https://code.launchpad.net/~samuel-thibault/compiz/shortcuts