add support for app-menu button in theme

Add app-menu button support in themes. This is done only to support
metacity theme format 3.5 version. Marco will not show this
button!

Based on metacity commit:
https://gitlab.gnome.org/GNOME/metacity/commit/6a2cc159

1 files changed, 27 insertions, 2 deletions

diff --git a/src/ui/theme.c b/src/ui/theme.c
index 6f463b3d..7035db5f 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -468,6 +468,8 @@ map_button_function_to_type (MetaButtonFunction  function)
       return META_BUTTON_TYPE_UNSTICK;
     case META_BUTTON_FUNCTION_MENU:
       return META_BUTTON_TYPE_MENU;
+    case META_BUTTON_FUNCTION_APPMENU:
+      return META_BUTTON_TYPE_APPMENU;
     case META_BUTTON_FUNCTION_MINIMIZE:
       return META_BUTTON_TYPE_MINIMIZE;
     case META_BUTTON_FUNCTION_MAXIMIZE:
@@ -536,6 +538,11 @@ rect_for_function (MetaFrameGeometry *fgeom,
         return &fgeom->menu_rect;
       else
         return NULL;
+    case META_BUTTON_FUNCTION_APPMENU:
+      if (flags & META_FRAME_ALLOWS_APPMENU)
+        return &fgeom->appmenu_rect;
+      else
+        return NULL;
     case META_BUTTON_FUNCTION_MINIMIZE:
       if (flags & META_FRAME_ALLOWS_MINIMIZE)
         return &fgeom->min_rect;
@@ -834,6 +841,12 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout  *layout,
       else if (strip_button (left_func_rects, left_bg_rects,
                              &n_left, &fgeom->menu_rect))
         continue;
+      else if (strip_button (right_func_rects, right_bg_rects,
+                             &n_right, &fgeom->appmenu_rect))
+        continue;
+      else if (strip_button (left_func_rects, left_bg_rects,
+                             &n_left, &fgeom->appmenu_rect))
+        continue;
       else
         {
           meta_bug ("Could not find a button to strip. n_left = %d n_right = %d\n",
@@ -4412,7 +4425,7 @@ map_button_state (MetaButtonType           button_type,
 
   switch (button_type)
     {
-    /* First hande functions, which map directly */
+    /* First handle functions, which map directly */
     case META_BUTTON_TYPE_SHADE:
     case META_BUTTON_TYPE_ABOVE:
     case META_BUTTON_TYPE_STICK:
@@ -4420,6 +4433,7 @@ map_button_state (MetaButtonType           button_type,
     case META_BUTTON_TYPE_UNABOVE:
     case META_BUTTON_TYPE_UNSTICK:
     case META_BUTTON_TYPE_MENU:
+    case META_BUTTON_TYPE_APPMENU:
     case META_BUTTON_TYPE_MINIMIZE:
     case META_BUTTON_TYPE_MAXIMIZE:
     case META_BUTTON_TYPE_CLOSE:
@@ -4626,6 +4640,10 @@ get_button_rect (MetaButtonType           type,
       *rect = fgeom->menu_rect.visible;
       break;
 
+    case META_BUTTON_TYPE_APPMENU:
+      *rect = fgeom->appmenu_rect.visible;
+      break;
+
     case META_BUTTON_TYPE_LAST:
       g_assert_not_reached ();
       break;
@@ -6081,6 +6099,8 @@ meta_button_type_from_string (const char *str, MetaTheme *theme)
     return META_BUTTON_TYPE_MINIMIZE;
   else if (strcmp ("menu", str) == 0)
     return META_BUTTON_TYPE_MENU;
+  else if (strcmp ("appmenu", str) == 0)
+    return META_BUTTON_TYPE_APPMENU;
   else if (strcmp ("left_left_background", str) == 0)
     return META_BUTTON_TYPE_LEFT_LEFT_BACKGROUND;
   else if (strcmp ("left_middle_background", str) == 0)
@@ -6124,8 +6144,10 @@ meta_button_type_to_string (MetaButtonType type)
       return "unabove";
     case META_BUTTON_TYPE_UNSTICK:
       return "unstick";
-     case META_BUTTON_TYPE_MENU:
+    case META_BUTTON_TYPE_MENU:
       return "menu";
+    case META_BUTTON_TYPE_APPMENU:
+      return "appmenu";
     case META_BUTTON_TYPE_LEFT_LEFT_BACKGROUND:
       return "left_left_background";
     case META_BUTTON_TYPE_LEFT_MIDDLE_BACKGROUND:
@@ -7005,6 +7027,9 @@ meta_theme_earliest_version_with_button (MetaButtonType type)
     case META_BUTTON_TYPE_RIGHT_SINGLE_BACKGROUND:
       return 3003;
 
+    case META_BUTTON_TYPE_APPMENU:
+      return 3005;
+
     default:
       meta_warning("Unknown button %d\n", type);
       return 1000;