_gtk_settings_get_style_cascade() checks for the given GtkSettings to be
non-NULL, but does so after using the pointer to get the
GtkSettingsPrivate.
Make sure we use the GtkSettings pointer only after the precondition is
verified.
https://gitlab.gnome.org/GNOME/gtk/-/issues/2780
GTK caches the settings per display in a static `GArray`, keeping a
reference to the `GdkDisplay` as the key.
However, when closing the display, the corresponding entry is not
removed from the cache in `GtkSettings`.
So when reopening again a `GdkDisplay`, if the new address matches one
of the previously closed display, the cache will return the existing
`GtkSettings` from the cache, which still holds a reference to the old
`GdkScreen` which was freed along the `GdkDisplay`.
To avoid the issue, make sure to remove the `GdkDisplay` and
corresponding `GdkSettings` when closing the `GdkDisplay`.
Also, care must be taken not to recreate the `GdkSettings` and re-add
the `GdkDisplay` to the cache once the display is closed, and make sure
callers of `gtk_settings_get_for_display()` can deal with a returned
value being `NULL` if the display is closed.
Fixes: commit 360a3c1690 - "Use a cheaper way to store settings per
display"
This IM context implementation goes through the gtk-text-input protocol,
leaving up to the compositor the actual interaction with IM engines. If
the protocol is not offered by the compositor, GTK+ will fallback to the
IMs as specified through GtkSettings.
This was another very frequent use of qdata. Since we typically
have only one or two display objects, storing the display-settings
association in a simple array is faster than using object data
or a hash table.
Christian Hergert reported seeing webkit crashes with recent
GTK+. The stacktrace points at the CSS machinery calling into
GtkSettings to get the font name, and then getting surprised
by a property notification that triggers style validation.
To avoid this, query the font name xsetting right away when
we get set a screen.
I was somehow under the misconception that we'd get GdkEventSettings
events for all the xsettings at startup. That is not in general true,
so we need to make sure that we check for the xsettings value before
we use them, or derived fields. Update all the private getters to
do so; and fix settings_update_font_values() to cope with font
descriptions that might miss the family or size.
I mistakenly assumed that gtk_settings_init was already doing
something to trigger a notify for all properties. It doesn't,
so we have to ensure that settings_update_font_values() is
called at least once.
https://bugzilla.gnome.org/show_bug.cgi?id=765966
When loading a per-theme settings.ini file, look for it in
the same directory where we found the gtk.css file for the
theme. Previously, we were always looking in
$prefix/share/themes/THEME/gtk-3.0/, even if the css was
loaded from somewhere else.
https://bugzilla.gnome.org/show_bug.cgi?id=641354
The default value for the double-click key in the
org.gnome.settings-daemon.peripherals.mouse schema is 400.
Use the same value as the declared default for the
gtk-double-click-time GTK+ setting, to avoid pointless
differences in corner cases.
https://bugzilla.gnome.org/show_bug.cgi?id=720950
In case the X11 backend is not enabled, we still need to include the
pangofc-fontmap.h header file, as we use the Pango/FontConfig API in
both the X11 and Wayland case.
https://bugzilla.gnome.org/show_bug.cgi?id=751625
Marking these as "Since: 3.14.1" may be more accurate, but
it causes gtk-doc to not put these symbols in any versioned
index at all (it generates an unused index for 3.14.1). So,
lets lie a little, and say these symbols were added in 3.14.
The button and menu item icons settings are deprecated; application
developers should control whether or not a widget should show an icon,
using the existing API.
https://bugzilla.gnome.org/show_bug.cgi?id=750718
Load themed cursors from the same places they are loaded on freedesktop systems,
but use W32 API functions to do so (works for .cur/.ani cursors instead of X
cursors).
Refactor the code for cursor handling. Prefer loading cursors by name.
Do not load actual cursors when loading the theme. Find the files and remember
the arguments/calls for loading them instead. Keeping HCURSOR instance in the
hashmap would result in multiple GdkCursors using the same HCURSOR. Given that
we use DestroyCursor() to off them, this would cause problems (at the very
least - DestroyCursor() would fail).
Store GdkCursor instances in a cache. Update cached cursors when theme changes.
Recognize "system" theme as a special (and default) case. When it is set,
prefer system cursors and fall back to Adwaita cursors and (as a last resort)
built-in X cursors. Otherwise prefer theme cursors and fall back to system and
X cursors.
Force GTK to use "left_ptr" cursor when no cursor is set. Using NULL makes
it use the system default "arrow", which is not the intended behaviour when
a non-system theme is selected.
Ignore cursor size setting and query the OS for the required cursor size, as
Windows (almost) does not allow setting cursors of arbitrary size.
https://bugzilla.gnome.org/show_bug.cgi?id=749287
This guarantees we only create 1 extra style cascade in total for hidpi
and not one per style context.
Style cascades are now nested like this:
GtkSettings root cascade (scale == 1)
|
+-- GtkSettings per scale cascade (for any scale, no custom providers)
|
+-- GtkStyleContext custom cascade (for any scale, custom providers)
This requires a bunch of care when changing cascade-related properties
inside GtkStyleContext, so that it ends up with a properly setup
cascade, but I think I got those cases right.
The only thing we don't do yet is reverting to a GtkSettings cascade
when the last custom provider is removed from a custom cascade.
Arrange things so that gtk-xdg-hinting==-1 and gtk-xfg-antialias==-1
end up as CAIRO_HINT_STYLE_DEFAULT and CAIRO_ANTIALIAS_DEFAULT in the
cairo font options.
This will not change anything on Linux desktops where xsettings will
always provide values different from -1. But on other platforms, we
can benefit from getting the platform-specific defaults in cairo.
Based on the first patch in:
https://bugzilla.gnome.org/show_bug.cgi?id=735316
