in the case where a client has no geometry set, attempting to update
the client's geometry during frame recalc will guarantee that wrong
geometry is set, resulting in a bad first frame
there was previously a frame in which maximized x11 csd clients would
reposition themselves offscreen before rendering
this is now fixed by adjusting the client geometries either upon
unsetting the csd or re-setting it, allowing the client to retain its
expected positioning without jitters
when applying new csd to a window which already has csd, the previous
csd must be removed in order to apply any new csd offsets in order to
avoid unwanted moving/resizing
since ICCCM requires that clients be unmapped while iconified, it's necessary
for the compositor to perform one last render prior to the unmap in order to
ensure that mirror objects will still appear as expected. this render must use
the pixmap buffer data in order to avoid timing issues due to async/deferred
rendering, and it is only necessary for the case of clients rendering with a
native surface
fix T2788
in some cases, it's possible for a client which expects to render on
the next frame to actually render on the frame after. in these cases,
the compositor must not clear the pixmap image until after the render
has occurred in order to avoid inaccuracies. for this reason, the best
place to flag a client for post-render work is at the time of the client's
render
ref T2762
ref D3120
if this isn't explicitly blocked by config options then allowing resizes
on the unmaximized axes is necessary in order to avoid accidentally
queuing a full unmaximize
according to ICCCM 4.1.4:
Only the client can effect a transition into or out of the Withdrawn state
withdrawn windows cannot be shown under any circumstances. the best that can
be done is to try mapping the window and hope it decides to appear.
to prevent any inadvertent showing of the window before it leaves the
withdrawn state, we play games with the E_Client->ignored flag in order
to skip client evals until we get notified that maybe we want to stop
skipping those evals
ref T2745
also includes 0e3cc2f533
gtk apps set an atom which provides information about the area
where non-window content (eg. shadows) may be drawn; this area
must not be used in placement calculations.
the easiest method for implementing this functionality was to add
a case to the compositor geometry interceptors which effectively
flip the client struct geometry values such that the E_Client->client
is outside of the more commonly used E_Client->x/y/w/h
fix T2744
when a client is set to "Always on Top", it will be on the same layer
as override clients. this can cause strange stacking and mouse eventing
in cases where these windows occupy the same space and the normal client
is stacked over the override
in the case of recursive desk flips, toggling a desk's visibility may
erroneously send queued evas events to the client's frame object, leading
to a focus-set (mouse-based focus models) which triggers a desk flip
inside the original desk flip. this "inner" desk flip is spurious and
should be ignored
according to the shape extension protocol, the number of rectangles returned should be checked to determine a client's shape. if 0 is returned, the client has no shape, meaning that it either should not be drawn or should have no input region. this improves behavior with various client window types such as tooltips
ref T1820
Mike Blumenkrantz
Chris Michael
Carsten Haitzler
Vincent Torri