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.
I hadn't noticed the :drop() pseudo state in the CSS4 Selectors
spec when I added this a while ago. This commit renames
GTK_STATE_FLAG_DND to GTK_STATE_FLAG_DROP_ACTIVE and adds
:drop(active) as equivalent to the :dnd pseudo state.
We don't actually do anything when the label is not selectable
except for consuming the event, which breaks for instance titlebar
drags with labels that contain links. Simply deny the gesture in
that case to allow the event to bubble up normally.
https://bugzilla.gnome.org/show_bug.cgi?id=759798
... on older Visual Studio versions, where isinf() is not available, and
copy the isinf() implementation from gdk/fallback-c89.c to
gtk/fallback-c89.c.
gdk_widget_get_frame_clock can return NULL. In particular,
this can happen when the drag window is destroyed at the end
of a DND operation. Handle this gracefully when it happens.
we have to do some assumptions for css selectors limits for this
particular case, so for split headerbars to work correctly the
actual haderbars need not to have the titlebar class applied.
The gtk_builtin_icon_get_default_size_property returns a const char *,
in a way such that some compilers insist that something that is of a
pointer value be returned, so fix that by replacing 0 with NULL.
When clicking "Cancel" on the "Do you want to use GTK+ Inspector?"
dialog, unregister the update_debugging idle handler. Also, steal
reference to 'inspector_window' while gtk_destroy_widget(), to make
further gtk_window_update_debugging() calls as a no-op.
https://bugzilla.gnome.org/show_bug.cgi?id=759764
The GetSize callback *can* assume that minimum and natural are
non-NULL. Buy minimum_baseline and natural_baseline can and
will be NULL, so handle that. This was causing crashes e.g. in
pavucontrol.
applications with split headerbars has a container in the titlebar
slot so the .titlebar style there needs to be reset. Since we can't
go backward with selectors I assumed that any csd application
sports a headerbar hence relying on that styling and resetting
the .titlebar styleclass.
