Add support for GTK frame extents

This is required for proper positionning and
resizing of CSD windows from GTK3/GNOME.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/netwm.c b/src/netwm.c
index de4b0d690..66e641ff9 100644
--- a/src/netwm.c
+++ b/src/netwm.c
@@ -1590,3 +1590,41 @@ clientRemoveUserTimeWin (Client * c)
         XSelectInput (display_info->dpy, c->user_time_win, NoEventMask);
     }
 }
+
+gboolean
+clientGetGtkFrameExtents (Client * c)
+{
+    ScreenInfo *screen_info;
+    DisplayInfo *display_info;
+    gulong *extents;
+    int nitems;
+    int i;
+
+    g_return_val_if_fail (c != NULL, FALSE);
+    TRACE ("entering clientGetGtkFrameExtents for \"%s\" (0x%lx)", c->name, c->window);
+
+    screen_info = c->screen_info;
+    display_info = screen_info->display_info;
+    c->has_frame_extents = FALSE;
+    extents = NULL;
+
+    if (getCardinalList (display_info, c->window, GTK_FRAME_EXTENTS, &extents, &nitems))
+    {
+        if (nitems == SIDE_COUNT)
+        {
+            c->has_frame_extents = TRUE;
+            for (i = 0; i < SIDE_COUNT; i++)
+            {
+                c->frame_extents[i] = (int) extents[i];
+            }
+        }
+    }
+
+    if (extents)
+    {
+        XFree (extents);
+    }
+
+    return c->has_frame_extents;
+}
+