Remove all the old 2.x and 3.x version annotations.
GTK+ 4 is a new start, and from the perspective of a
GTK+ 4 developer all these APIs have been around since
the beginning.
commit 475d916eb9 added various paths that
use theme-name for this, but the existing path already used THEME, with
a subsequent description referring to the latter. So use that everywhere
This is just lots of renaming.
The interface remains private, so the public API does not change, apart
from removing the definition of the Interface object to avoid
subclassing.
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
With this change, we now look in
$XDG_DATA_HOME/themes/THEME/gtk-3.x
$HOME/.themes/THEME/gtk-3.x
$XDG_DATA_DIRS/themes/THEME/gtk-3.x
GTK_DATA_PREFIX/themes/THEME/gtk-3.x
https://bugzilla.gnome.org/show_bug.cgi?id=641354
Instead of
/org/gtk/libgtk/theme/$THEME-$VARIANT.css
look at
/org/gtk/libgtk/theme/$THEME/gtk-$VARIANT.css
and that way mirror the directory layout of real themes.
Currently, GtkCssProvider can emit ::parsing-error only during
the actual parsing, although the documentation hints that it might
happen at other times.
This commit adds a emit_error method to the GtkStyleProviderPrivate
interface that will let us emit errors from the compute() implementations
as well, which can be useful (e.g. if an image fails to load).
Split the CSS docs off from the GtkCssProvider docs and
give them their own chapter. Among other things, this commit
introduces more or less complete definitions of the syntax for
the supported selectors, a complete list of all supported
properties, and definitions for their values. This includes
documentation for GTK+-specific properties such as -gtk-icon-source.
When loading a nonexisting CSS file using
gtk_css_provider_load_from_file() or gtk_css_provider_load_from_path()
we would emit the error using a NULL scanner. Don't do that, because
we'll have a NULL section in that case and error handlers don't like
that.
Testcase attached.
https://bugzilla.redhat.com/show_bug.cgi?id=1277959
GtkCssProvider was using the wrong unref function for GtkCssKeyframe
objects. Funnily, this didn't crash at all, the refcount was at the
same place in the struct - it just didn't free all the memory, causing
valgrind to complain.
The node declaration has the same functionality as
gtk_css_node_declaration_add_to_widget_path(). So instead of using that
function on a path, you can use the original path and the declaration in
a matcher.
Look for themes in $prefix/themes/$name/gtk-$version/ (for
version = 3.16, 3.14, ...), before using the old location
$prefix/themes/$name/gtk-3.0/. This gives theme authors a
way to support multiple versions of GTK+ 3 with separate
css files.
