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core: listen for substructure notify on frame windows 

So we can pick up destroy notify of the client windows. Because we need
the destroy notify of the client window to trigger a client window
recheck on the frame window. This is to handle the case where a frame
window is later reused, and the case where multiple client windows are
momentarily attached to the same frame[1].

This will also cause events previously unseen to be generated. Most of
the events would be ignored, because they don't have a corresponding
managed window. Change has been made to ev_reparent_notify, so it would
handle the case where a client window is reparented from one frame to
another[2]. Previously such events are not received by picom.

Related[1]: e9ab970989
Related[2]: 481ac54f67
Related: #299

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2020-04-05 22:45:49 +01:00
parent e9ab970989
commit bdf809d039
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GPG Key ID: 37C999F617EA1A47
1 changed files with 2 additions and 2 deletions
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src/picom.c
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@ -303,9 +303,9 @@ uint32_t determine_evmask(session_t *ps, xcb_window_t wid, win_evmode_t mode) {
struct managed_win *w = NULL;
// Check if it's a mapped frame window
if (WIN_EVMODE_FRAME == mode ||
if (mode == WIN_EVMODE_FRAME ||
((w = find_managed_win(ps, wid)) && w->a.map_state == XCB_MAP_STATE_VIEWABLE)) {
evmask |= XCB_EVENT_MASK_PROPERTY_CHANGE;
evmask |= XCB_EVENT_MASK_PROPERTY_CHANGE | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY;
if (!ps->o.use_ewmh_active_win) {
evmask |= XCB_EVENT_MASK_FOCUS_CHANGE;
}