[metacity] theme (gtk+): fix missing border on windows

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 283e19a9a4df8209db58958709957ab5a46bf7ea
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Apr 15 15:35:47 2015 +0300

    theme (gtk+): fix missing border on windows
    
    If windows are not resizable then invisible border is set to 0.
    This is problem with GTK+ themes because border (box-shadow) is in
    invisible area.

 src/ui/theme.c |   25 +++++++++++++++++++------
 1 files changed, 19 insertions(+), 6 deletions(-)
---
diff --git a/src/ui/theme.c b/src/ui/theme.c
index 927b2a5..8532080 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -417,6 +417,7 @@ meta_frame_layout_get_borders (const MetaFrameLayout *layout,
                                MetaFrameBorders      *borders)
 {
   int buttons_height, title_height;
+  MetaTheme *current;
 
   meta_frame_borders_clear (borders);
 
@@ -440,18 +441,30 @@ meta_frame_layout_get_borders (const MetaFrameLayout *layout,
   borders->visible.right = layout->right_width;
   borders->visible.bottom = layout->bottom_height;
 
-  if (flags & META_FRAME_ALLOWS_HORIZONTAL_RESIZE)
+  current = meta_theme_get_current ();
+
+  if (current->is_gtk_theme == TRUE)
     {
       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)
+  else
     {
-      borders->invisible.bottom = layout->invisible_border.bottom;
+      if (flags & META_FRAME_ALLOWS_HORIZONTAL_RESIZE)
+        {
+          borders->invisible.left = layout->invisible_border.left;
+          borders->invisible.right = layout->invisible_border.right;
+        }
 
-      if (type != META_FRAME_TYPE_ATTACHED)
-        borders->invisible.top = layout->invisible_border.top;
+      if (flags & META_FRAME_ALLOWS_VERTICAL_RESIZE)
+        {
+          borders->invisible.bottom = layout->invisible_border.bottom;
+
+          if (type != META_FRAME_TYPE_ATTACHED)
+            borders->invisible.top = layout->invisible_border.top;
+        }
     }
 
   borders->total.left = borders->invisible.left + borders->visible.left;