theme: don't add invisible borders for windows that can't be resized

Invisible borders are all about resizing -- in the case that a window
cannot be resized, it makes no sense to add them.

https://bugzilla.gnome.org/show_bug.cgi?id=659854

Based on mutter commit:
https://git.gnome.org/browse/mutter/commit/?id=be9f7d77292c1dfd868640fe95f7223fbbfd4273

upstream commit:
https://gitlab.gnome.org/GNOME/metacity/commit/64615667

1 files changed, 14 insertions, 7 deletions

diff --git a/src/ui/theme.c b/src/ui/theme.c
index 9a7bf455..c34a7330 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -409,6 +409,12 @@ meta_frame_layout_get_borders (const MetaFrameLayout *layout,
 {
   int buttons_height, title_height;
 
+  meta_frame_borders_clear (borders);
+
+  /* For a full-screen window, we don't have any borders, visible or not. */
+  if (flags & META_FRAME_FULLSCREEN)
+    return;
+
   g_return_if_fail (layout != NULL);
 
   if (!layout->has_title)
@@ -425,16 +431,17 @@ meta_frame_layout_get_borders (const MetaFrameLayout *layout,
   borders->visible.right = layout->right_width;
   borders->visible.bottom = layout->bottom_height;
 
-  if (flags & META_FRAME_FULLSCREEN)
+  if (flags & META_FRAME_ALLOWS_HORIZONTAL_RESIZE)
     {
-      meta_frame_borders_clear (borders);
-      return;
+      borders->invisible.left = layout->invisible_border.left;
+      borders->invisible.right = layout->invisible_border.right;
     }
 
-  borders->invisible.left = layout->invisible_border.left;
-  borders->invisible.right = layout->invisible_border.right;
-  borders->invisible.bottom = layout->invisible_border.bottom;
-  borders->invisible.top = layout->invisible_border.top;
+  if (flags & META_FRAME_ALLOWS_VERTICAL_RESIZE)
+    {
+      borders->invisible.bottom = layout->invisible_border.bottom;
+      borders->invisible.top = layout->invisible_border.top;
+    }
 
   if (flags & META_FRAME_SHADED)
     borders->visible.bottom = borders->invisible.bottom = 0;