From bcbc109d2801e2c8898ebb558febe99945358d53 Mon Sep 17 00:00:00 2001
From: infirit <infirit@gmail.com>
Date: Fri, 24 Oct 2014 12:51:12 +0200
Subject: add support for _GTK_FRAME_EXTENTS
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Support for _GTK_FRAME_EXTENTS are based on mutter.

Based on metacity commit: e132e2a700c4b50c93eae064d8fd1769b67baf06
By: Alberts Muktupāvels <alberts.muktupavels@gmail.com>
---
 src/core/atomnames.h      |  2 +-
 src/core/window-private.h |  3 +++
 src/core/window-props.c   | 56 ++++++++++++++++++++++++++++++++++++++++++++++-
 src/core/window.c         | 13 ++++++++++-
 4 files changed, 71 insertions(+), 3 deletions(-)

diff --git a/src/core/atomnames.h b/src/core/atomnames.h
index 20edcd2b..2775d3db 100644
--- a/src/core/atomnames.h
+++ b/src/core/atomnames.h
@@ -58,6 +58,7 @@ item(_MARCO_RESTART_MESSAGE)
 item(_MARCO_RELOAD_THEME_MESSAGE)
 item(_MARCO_SET_KEYBINDINGS_MESSAGE)
 item(_MARCO_TOGGLE_VERBOSE)
+item(_GTK_FRAME_EXTENTS)
 item(_MATE_PANEL_ACTION)
 item(_MATE_PANEL_ACTION_MAIN_MENU)
 item(_MATE_PANEL_ACTION_RUN_DIALOG)
@@ -70,7 +71,6 @@ item(MULTIPLE)
 item(TIMESTAMP)
 item(VERSION)
 item(ATOM_PAIR)
-item(_GTK_FRAME_EXTENTS)
 
 /* Oddities: These are used, and we need atoms for them,
  * but when we need all _NET_WM hints (i.e. when we're making
diff --git a/src/core/window-private.h b/src/core/window-private.h
index 65359e15..e81fd7ac 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -355,6 +355,9 @@ struct _MetaWindow
    */
   MetaRectangle rect;
 
+  gboolean has_custom_frame_extents;
+  GtkBorder custom_frame_extents;
+
   /* The geometry to restore when we unmaximize.  The position is in
    * root window coords, even if there's a frame, which contrasts with
    * window->rect above.  Note that this gives the position and size
diff --git a/src/core/window-props.c b/src/core/window-props.c
index 3e870bc6..9aab46ea 100644
--- a/src/core/window-props.c
+++ b/src/core/window-props.c
@@ -215,12 +215,66 @@ reload_kwm_win_icon (MetaWindow    *window,
   reload_icon (window, window->display->atom__KWM_WIN_ICON);
 }
 
+static gboolean
+gtk_border_equal (GtkBorder *a,
+                  GtkBorder *b)
+{
+  return (a->left == b->left &&
+          a->right == b->right &&
+          a->top == b->top &&
+          a->bottom == b->bottom);
+}
+
+static void
+meta_window_set_custom_frame_extents (MetaWindow *window,
+                                      GtkBorder  *extents)
+{
+  if (extents)
+    {
+      if (window->has_custom_frame_extents && gtk_border_equal (&window->custom_frame_extents, extents))
+        return;
+
+      window->has_custom_frame_extents = TRUE;
+      window->custom_frame_extents = *extents;
+    }
+  else
+    {
+      if (!window->has_custom_frame_extents)
+        return;
+
+      window->has_custom_frame_extents = FALSE;
+      memset (&window->custom_frame_extents, 0, sizeof (window->custom_frame_extents));
+    }
+
+  meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
+}
+
 static void
 reload_gtk_frame_extents (MetaWindow    *window,
                           MetaPropValue *value,
                           gboolean       initial)
 {
-  return;
+  if (value->type != META_PROP_VALUE_INVALID)
+    {
+      if (value->v.cardinal_list.n_cardinals != 4)
+        {
+          meta_verbose ("_GTK_FRAME_EXTENTS on %s has %d values instead of 4\n",
+                        window->desc, value->v.cardinal_list.n_cardinals);
+        }
+      else
+        {
+          GtkBorder extents;
+          extents.left   = (int)value->v.cardinal_list.cardinals[0];
+          extents.right  = (int)value->v.cardinal_list.cardinals[1];
+          extents.top    = (int)value->v.cardinal_list.cardinals[2];
+          extents.bottom = (int)value->v.cardinal_list.cardinals[3];
+          meta_window_set_custom_frame_extents (window, &extents);
+        }
+    }
+  else
+    {
+      meta_window_set_custom_frame_extents (window, NULL);
+    }
 }
 
 static void
diff --git a/src/core/window.c b/src/core/window.c
index 694ba99e..75923e29 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -4042,7 +4042,18 @@ meta_window_get_outer_rect (const MetaWindow *window,
   if (window->frame)
     *rect = window->frame->rect;
   else
-    *rect = window->rect;
+    {
+        *rect = window->rect;
+
+	if (window->has_custom_frame_extents)
+	  {
+	    const GtkBorder *extents = &window->custom_frame_extents;
+	    rect->x += extents->left;
+	    rect->y += extents->top;
+	    rect->width -= extents->left + extents->right;
+	    rect->height -= extents->top + extents->bottom;
+	  }
+    }
 }
 
 void
-- 
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