Shadow and padding was never part of theme. This format was created by mutter, and it is an incompatible change.
Add an additional color type to pick up colors defined with @define-color in the GTK+ theme's CSS: gtk:custom(name,fallback) (where "name" refers to the name defined in GTK+'s CSS, and fallback refers to an alternative color spec which is used when the color referenced by "name" is not found) The main intent of the change is to allow designers to improve Adwaita's dark theme variant without having to compromise on colors which work in the light variant as well. https://bugzilla.gnome.org/show_bug.cgi?id=648709 NOTE: Patch copied from mutter and adapted for metacity.
It may be desirable for theme authors to treat side-by-side tiled windows differently, for instance to give the edge-touching border a width of 0, so add additional frame states for tiled windows. https://bugzilla.gnome.org/show_bug.cgi?id=637330 NOTE: Patch copied from mutter and adapted for metacity. This adds only description in doc/theme-format.txt as all other changes has been added already.
With the existing background functions, single buttons can not be styled separately - on the left side, the style of the left button is picked, and the right button's style on the right side. As theme authors may want to add rounded corners to button groups as a whole, it makes sense to treat the case of a single button in a group differently. https://bugzilla.gnome.org/show_bug.cgi?id=635683 NOTE: Patch copied from mutter and adapted for metacity.
Add a new frame type META_FRAME_TYPE_ATTACHED which is used for attached modal dialogs. The theme format version is bumped to 3.2, and attached windows can have borders defined in a metacity-theme-3.xml as: <window version=">= 3.2" type="attached" style_set="[name]"/> If no style is defined for "attached", drawing will fall back to the "border" type. https://bugzilla.gnome.org/show_bug.cgi?id=592382 NOTE: Patch copied from mutter and adapted for metacity.
It's nice to indicate when a title is truncated with an ellipsis. Because themes may draw a title multiple times to draw a shadow, or may include the window icon within the title area, we can't determine the proper ellipsization width automatically, so add an optional attribute to the <title/> element "ellipsize_width" which, if set, is the width to ellipsize at. This is only enabled if a theme version of 3.1 is required. When it's not set, we keep the old behavior of just letting the title be clipped with a hard edge. https://bugzilla.gnome.org/show_bug.cgi?id=591842 NOTE: Patch copied from mutter and adapted for metacity.
Sometimes you want to position something (usually the title) to be centered with respect to the entire frame instead of centered with respect to the individual piece currently being drawn. This patch adds frame_x_center and frame_y_center variables that represent the X/Y centers of the frame in the coordinate system of the piece being drawn. The theme version is bumped from 3.0 to 3.1 (3.0 is just the new version system, 3.1 will have all the features we add for Mutter-2.28.) position expressions https://bugzilla.gnome.org/show_bug.cgi?id=591842 NOTE: Patch is copied from mutter and is adapted for metacity.
The current mechanism of metacity-theme-1.xml and metacity-theme-2.xml is not flexible for allowing small-scale additions. With this patch we bump the major version version once more to metacity-theme-3.xml and add a single feature: Any element in the DTD can have an attribute: version="[<|<=|=>|>] MAJOR.MINOR" And it will be ignored unless the predicate is met. (< and > should be to be entity escaped as < and >) This allows having alternate sections of the theme file for older and newer version. * Required GLib version is bumped to 2.14 so we can parse versions with a regular expression. * We switch internal version numbers to be "1000 * major + minor" * We keep a stack of the maximum required version for the current portion the XML tree so that the "cannot use versions you don't require" stricture of the old code can be made local to a subpart of the tree. * A version on the top metacity_theme element causes the entire file to be ignored; this allows having one metacity-theme-3.xml for version 3.2 and newer (say) and a metacity-1.xml for everything old. Actual new features will be added starting with 3.1 - 3.0 is just the version="" feature. http://bugzilla.gnome.org/show_bug.cgi?id=592503 NOTE: Patch is copied from mutter and adapted for metacity. origin commit: https://gitlab.gnome.org/GNOME/metacity/commit/114a2048