GDK_TOUCH_END deserves the same treatment than GDK_BUTTON_RELEASE, since it's
subject to the same circumstances (popping up a menu on long press would be
immediately dismissed on release if we handled them there). Ideally, we would
want to match releases that we obtained a press for while grabbed, but as
the popup is also dismissed on GDK_BUTTON_PRESS/GDK_TOUCH_BEGIN, there's no
use for this tracking.
And GDK_TOUCH_CANCEL sounds weird as a reason to dismiss popups, just like
crossing events would.
Related: https://gitlab.gnome.org/GNOME/mutter/-/issues/2512
Even though button 1 (or touch down) presses do most often have
an effect in one way or another (starting drag, moving focus,
starting selection, ...), there is one situation that they do
immediately nothing: When clicking on the entry does not move
the text caret around. Dragging might start a selection, but
the entry did not do anything just yet, and an immediate
button/touch release should remain at "did nothing".
And that is precisely the hint that the Wayland IM context's click
gesture takes, clicks that do not scroll nor move the caret around,
having the GtkText not claim the gesture in that situation makes
the IM gesture able to do its thing without in-fighting.
This is typically not a problem when the GtkText is embedded in
another GtkEditable implementation (e.g. GtkEntry), since the
IM gesture is inactive and capturing from the parent widget, so
gets a pass that it otherwise doesn't get when both gestures are
in the same widget. This makes it work regardless of GtkText not
being a child of a composite widget, like NautilusQueryEditor
and AdwRowEntry.
Closes: https://gitlab.gnome.org/GNOME/gtk/-/issues/5351
Everybody (including myself) gets this wrong,
so accept 'simple' and 'none' as shorthands
for the official IDs 'gtk-im-context-simple'
and 'gtk-im-context-none'.
clang complained that we may end up jumping
to the cleanup code without initializing data
in the jpeg code. Always initialize data to
NULL to prevent that eventuality.
This is largely adapted from commit 83027c68f1 ("11: Implement
inhibit_system_shortcuts API"), with similar rationale:
To implement the inhibit_system_shortcuts API on X11, we emulate the
same behavior using grabs on the keyboard.
To avoid keeping active grabs on the keyboard that would affect
other X11 applications even when the surface isn't focused, the X11
implementation takes care of releasing the grabs as soon as the
toplevel loses focus.
Note that Windows has low-level keyboard hooks that could help achieve
the expected behaviour. This is implemented by spice-gtk & gtk-vnc for
example, but correctness isn't obvious. I left a TODO comment.
This patch helps implementing remote desktop widgets with GTK4, since
currently on win32 backend Alt-Tab and such are always left to the
system unless there is keyboard grab (which can't be requested by the
client API anymore, afaict).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
