Grips have long been unused in GTK, so remove all support for them.
This removes the GTK_STYLE_CLASS_GRIP and the special
gtk_render_handle() code for drawing those grips.
The new function, gtk_render_background_get_clip answers the
question: what pixels are affected if I call gtk_render_background ?
The long-term goal is to have APIs that answer this question for
all rendering primitives.
In https://bugzilla.gnome.org/show_bug.cgi?id=601425 the annotations
were changed to int as they not only take the predefined enum values
but also user defined values registered through gtk_icon_size_register()
As a result the typelib doesn't contain any information about
GtkIconSize for those arguments and the Python docstring only
shows the corresponding Python type "int".
This changes the argument docs to mention the type explicitly
so the Python doc generator can add a link to Gtk.IconSize
which contains the most useful predefined values.
https://bugzilla.gnome.org/show_bug.cgi?id=757411
It is not necessary for the users of this API, and causes things
to not work as intended. Without this transient node, styling
"notebook header tabs arrow" has the desired effect on notebook
arrows.
A GdkPixbuf has no scaling factor, so drawing directly from it can only
using a scale of 1, to avoid blurry, fuzzy icons.
You should be using gtk_render_icon_surface() anyway.
The spinner is a regular builtin image now. There is no need to go
through the shadows code manually anymore as regular items do get
shadows automatically.
This also allows simplifying the actual spinner drawing code so that it
actually works.
Instead of supporting every angle, just support top, right, bottom and
left and round the angle to one of those directions.
Adwaita overrides arrows anyway and doesn't even look at the angle, so
this should not be a problem.
Also, make it have a generic entry point with
gtk_css_image_builtin_draw().
The only feature lost so is the drawing of shadows for spinners, but
that will come back later.
... and make it the default. This takes over the meaning from "none" for
this property in that it draws the fallback builtin image.
"none" now literally means no image will be drawn.
The code did weird things with drawing backgrounds sometimes but not
really. Now it does this:
(1) render a background
(2) render a frame
(3) render an icon
- if no icon exists, draw the generic handle icon
We want to render a background *and* the current color (if there is
one).
This also adds a custom function gtk_render_add_content_path() which
adds the path of the current content area to a cairo_t.
