File metacity-gtk-3.20.patch of Package metacity

--- a/configure.ac
+++ b/configure.ac
@@ -89,7 +89,7 @@ dnl Check for required packages
 dnl **************************************************************************
 
 GLIB_REQUIRED_VERSION=2.44.0
-GTK_REQUIRED_VERSION=3.22.0
+GTK_REQUIRED_VERSION=3.20.0
 PANGO_REQUIRED_VERSION=1.2.0
 XCOMPOSITE_REQUIRED_VERSION=0.3
 
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -1973,8 +1973,13 @@ event_callback (XEvent   *event,
               if (meta_prefs_get_raise_on_click ())
                 meta_window_raise (window);
 
+#if GTK_CHECK_VERSION (3, 22, 0)
               rect.x = event->xbutton.x;
               rect.y = event->xbutton.y;
+#else
+              rect.x = event->xbutton.x_root;
+              rect.y = event->xbutton.y_root;
+#endif
               rect.width = 0;
               rect.height = 0;
 
--- a/src/core/keybindings.c
+++ b/src/core/keybindings.c
@@ -2803,6 +2803,7 @@ handle_activate_window_menu (MetaDisplay
       GdkRectangle rect;
       GdkEvent *gdk_event;
 
+#if GTK_CHECK_VERSION (3, 22, 0)
       if (display->focus_window->frame)
         {
           rect.x = display->focus_window->rect.x;
@@ -2816,6 +2817,15 @@ handle_activate_window_menu (MetaDisplay
 
       rect.width = display->focus_window->rect.width;
       rect.height = 0;
+#else
+      meta_window_get_position (display->focus_window, &rect.x, &rect.y);
+
+      if (meta_ui_get_direction() == META_UI_DIRECTION_RTL)
+        rect.x += display->focus_window->rect.width;
+
+      rect.width = 0;
+      rect.height = 0;
+#endif
 
       if (meta_window_is_client_decorated (display->focus_window))
         {
--- a/src/ui/fixedtip.c
+++ b/src/ui/fixedtip.c
@@ -36,12 +36,24 @@ get_monitor_geometry (gint          root
                       GdkRectangle *geometry)
 {
   GdkDisplay *display;
+#if GTK_CHECK_VERSION (3, 22, 0)
   GdkMonitor *monitor;
+#else
+  GdkScreen *screen;
+  int monitor;
+#endif
 
   display = gdk_display_get_default ();
+#if GTK_CHECK_VERSION (3, 22, 0)
   monitor = gdk_display_get_monitor_at_point (display, root_x, root_y);
 
   gdk_monitor_get_geometry (monitor, geometry);
+#else
+  screen = gdk_display_get_default_screen (display);
+  monitor = gdk_screen_get_monitor_at_point (screen, root_x, root_y);
+
+  gdk_screen_get_monitor_geometry (screen, monitor, geometry);
+#endif
 }
 
 void
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -1663,8 +1663,13 @@ meta_frame_titlebar_event (MetaFrames
       {
         GdkRectangle rect;
 
+#if GTK_CHECK_VERSION (3, 22, 0)
         rect.x = event->x;
         rect.y = event->y;
+#else
+        rect.x = event->x_root;
+        rect.y = event->y_root;
+#endif
         rect.width = 0;
         rect.height = 0;
 
@@ -1834,6 +1839,15 @@ meta_frames_button_press_event (GtkWidge
               return FALSE;
             }
 
+#if !GTK_CHECK_VERSION (3, 22, 0)
+          rect.x += event->x_root - event->x;
+          rect.y += rect.height + event->y_root - event->y;
+
+          /* Align to the right end of the menu rectangle if RTL */
+          if (meta_ui_get_direction() == META_UI_DIRECTION_RTL)
+            rect.x += rect.width;
+#endif
+
           frame->ignore_leave_notify = TRUE;
           meta_core_show_window_menu (frames->xdisplay,
                                       frame->xwindow,
--- a/src/ui/menu.c
+++ b/src/ui/menu.c
@@ -444,11 +444,39 @@ meta_window_menu_new   (MetaFrames
   return menu;
 }
 
+#if !GTK_CHECK_VERSION (3, 22, 0)
+static void
+popup_position_func (GtkMenu  *menu,
+                     gint     *x,
+                     gint     *y,
+                     gboolean *push_in,
+                     gpointer  user_data)
+{
+  GtkRequisition req;
+  GdkPoint *pos;
+
+  pos = user_data;
+
+  gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL);
+
+  *x = pos->x;
+  *y = pos->y;
+
+  if (meta_ui_get_direction() == META_UI_DIRECTION_RTL)
+    *x = MAX (0, *x - req.width);
+
+  /* Ensure onscreen */
+  *x = CLAMP (*x, 0, MAX (0, gdk_screen_width () - req.width));
+  *y = CLAMP (*y, 0, MAX (0, gdk_screen_height () - req.height));
+}
+#endif
+
 void
 meta_window_menu_popup (MetaWindowMenu     *menu,
                         const GdkRectangle *rect,
                         const GdkEvent     *event)
 {
+#if GTK_CHECK_VERSION (3, 22, 0)
   GdkEventAny *any;
 
   any = (GdkEventAny *) event;
@@ -458,6 +486,33 @@ meta_window_menu_popup (MetaWindowMenu
                           GDK_GRAVITY_SOUTH_WEST,
                           GDK_GRAVITY_NORTH_WEST,
                           event);
+#else
+  GdkPoint *pt;
+  int button;
+  guint32 timestamp;
+
+  pt = g_new (GdkPoint, 1);
+
+  g_object_set_data_full (G_OBJECT (menu->menu), "destroy-point", pt, g_free);
+
+  pt->x = rect->x;
+  pt->y = rect->y;
+
+  if (event->type == GDK_KEY_PRESS)
+    {
+      button = 0;
+      timestamp = ((GdkEventKey *) event)->time;
+    }
+  else
+    {
+      button = ((GdkEventButton *) event)->button;
+      timestamp = ((GdkEventButton *) event)->time;
+    }
+
+  gtk_menu_popup (GTK_MENU (menu->menu), NULL, NULL,
+                  popup_position_func, pt,
+                  button, timestamp);
+#endif
 
   if (!gtk_widget_get_visible (menu->menu))
     {