[metacity] compositor: add meta_compositor_is_our_xwindow

[Alberts Muktupāvels <muktupavels src gnome org>]

commit f509916ccc5aeca1f7b6c43485e4e0aed4c56ca1
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Feb 27 23:56:50 2017 +0200

    compositor: add meta_compositor_is_our_xwindow

 src/compositor/meta-compositor-none.c    |    8 ++++++++
 src/compositor/meta-compositor-private.h |    3 +++
 src/compositor/meta-compositor-xrender.c |   22 ++++++++++++++++++++++
 src/compositor/meta-compositor.c         |   11 +++++++++++
 src/include/meta-compositor.h            |    3 +++
 5 files changed, 47 insertions(+), 0 deletions(-)
---
diff --git a/src/compositor/meta-compositor-none.c b/src/compositor/meta-compositor-none.c
index c76814d..f63e236 100644
--- a/src/compositor/meta-compositor-none.c
+++ b/src/compositor/meta-compositor-none.c
@@ -128,6 +128,13 @@ meta_compositor_none_unmaximize_window (MetaCompositor *compositor,
 {
 }
 
+static gboolean
+meta_compositor_none_is_our_xwindow (MetaCompositor *compositor,
+                                     Window          xwindow)
+{
+  return FALSE;
+}
+
 static void
 meta_compositor_none_class_init (MetaCompositorNoneClass *none_class)
 {
@@ -150,6 +157,7 @@ meta_compositor_none_class_init (MetaCompositorNoneClass *none_class)
   compositor_class->free_window = meta_compositor_none_free_window;
   compositor_class->maximize_window = meta_compositor_none_maximize_window;
   compositor_class->unmaximize_window = meta_compositor_none_unmaximize_window;
+  compositor_class->is_our_xwindow = meta_compositor_none_is_our_xwindow;
 }
 
 static void
diff --git a/src/compositor/meta-compositor-private.h b/src/compositor/meta-compositor-private.h
index a0a4a0d..17a3fc4 100644
--- a/src/compositor/meta-compositor-private.h
+++ b/src/compositor/meta-compositor-private.h
@@ -81,6 +81,9 @@ struct _MetaCompositorClass
 
   void              (* unmaximize_window)  (MetaCompositor     *compositor,
                                             MetaWindow         *window);
+
+  gboolean          (* is_our_xwindow)     (MetaCompositor     *compositor,
+                                            Window              xwindow);
 };
 
 G_END_DECLS
diff --git a/src/compositor/meta-compositor-xrender.c b/src/compositor/meta-compositor-xrender.c
index 3f314c8..28cb75a 100644
--- a/src/compositor/meta-compositor-xrender.c
+++ b/src/compositor/meta-compositor-xrender.c
@@ -3694,6 +3694,27 @@ meta_compositor_xrender_unmaximize_window (MetaCompositor *compositor,
   cw->needs_shadow = window_has_shadow (cw);
 }
 
+static gboolean
+meta_compositor_xrender_is_our_xwindow (MetaCompositor *compositor,
+                                        Window          xwindow)
+{
+  MetaDisplay *display;
+  MetaScreen *screen;
+  MetaCompScreen *info;
+
+  display = meta_compositor_get_display (compositor);
+  screen = meta_display_get_screen (display);
+  info = meta_screen_get_compositor_data (screen);
+
+  if (info == NULL)
+    return FALSE;
+
+  if (info->output == xwindow)
+    return TRUE;
+
+  return FALSE;
+}
+
 static void
 meta_compositor_xrender_class_init (MetaCompositorXRenderClass *xrender_class)
 {
@@ -3716,6 +3737,7 @@ meta_compositor_xrender_class_init (MetaCompositorXRenderClass *xrender_class)
   compositor_class->free_window = meta_compositor_xrender_free_window;
   compositor_class->maximize_window = meta_compositor_xrender_maximize_window;
   compositor_class->unmaximize_window = meta_compositor_xrender_unmaximize_window;
+  compositor_class->is_our_xwindow = meta_compositor_xrender_is_our_xwindow;
 }
 
 static void
diff --git a/src/compositor/meta-compositor.c b/src/compositor/meta-compositor.c
index 86d4125..c1fd6fe 100644
--- a/src/compositor/meta-compositor.c
+++ b/src/compositor/meta-compositor.c
@@ -353,6 +353,17 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
 {
 }
 
+gboolean
+meta_compositor_is_our_xwindow (MetaCompositor *compositor,
+                                Window          xwindow)
+{
+  MetaCompositorClass *compositor_class;
+
+  compositor_class = META_COMPOSITOR_GET_CLASS (compositor);
+
+  return compositor_class->is_our_xwindow (compositor, xwindow);
+}
+
 MetaDisplay *
 meta_compositor_get_display (MetaCompositor *compositor)
 {
diff --git a/src/include/meta-compositor.h b/src/include/meta-compositor.h
index 7555d11..8c1d19a 100644
--- a/src/include/meta-compositor.h
+++ b/src/include/meta-compositor.h
@@ -95,6 +95,9 @@ void             meta_compositor_unmaximize_window  (MetaCompositor     *composi
 void             meta_compositor_sync_stack         (MetaCompositor     *compositor,
                                                      GList              *stack);
 
+gboolean         meta_compositor_is_our_xwindow     (MetaCompositor     *compositor,
+                                                     Window              xwindow);
+
 MetaDisplay     *meta_compositor_get_display        (MetaCompositor     *compositor);
 
 G_END_DECLS