API: Add size getters for GdkWindow

gdk_window_get_width() and gdk_window_get_height() will replace
gdk_drawable_get_size().

docs/reference/gdk/gdk3-sections.txt

@@ -431,6 +431,8 @@ gdk_window_get_cursor
 gdk_window_get_user_data
 gdk_window_get_geometry
 gdk_window_set_geometry_hints
+gdk_window_get_width
+gdk_window_get_height
 gdk_window_set_icon_list
 gdk_window_set_modal_hint
 gdk_window_get_modal_hint

gdk/gdk.symbols

@@ -560,6 +560,7 @@ gdk_window_get_cursor
 gdk_window_get_display
 gdk_window_get_focus_on_map
 gdk_window_get_geometry
+gdk_window_get_height
 gdk_window_get_modal_hint
 gdk_window_get_origin
 gdk_window_get_root_coords
@@ -567,6 +568,7 @@ gdk_window_set_support_multidevice
 gdk_window_get_support_multidevice
 gdk_window_get_screen
 gdk_window_get_visual
+gdk_window_get_width
 gdk_window_has_native
 gdk_window_set_background
 gdk_window_set_background_pattern

gdk/gdkwindow.c

@@ -7006,6 +7006,54 @@ gdk_window_get_geometry (GdkWindow *window,
     }
 }
 
+/**
+ * gdk_window_get_width:
+ * @window: a #GdkWindow
+ *
+ * Returns the width of the given @window.
+ *
+ * On the X11 platform the returned size is the size reported in the
+ * most-recently-processed configure event, rather than the current
+ * size on the X server.
+ * 
+ * Returns: The width of @window
+ */
+int
+gdk_window_get_width (GdkWindow *window)
+{
+  GdkWindowObject *private;
+
+  g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
+
+  private = (GdkWindowObject *) window;
+
+  return private->width;
+}
+
+/**
+ * gdk_window_get_height:
+ * @window: a #GdkWindow
+ *
+ * Returns the height of the given @window.
+ *
+ * On the X11 platform the returned size is the size reported in the
+ * most-recently-processed configure event, rather than the current
+ * size on the X server.
+ * 
+ * Returns: The height of @window
+ */
+int
+gdk_window_get_height (GdkWindow *window)
+{
+  GdkWindowObject *private;
+
+  g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
+
+  private = (GdkWindowObject *) window;
+
+  return private->height;
+}
+
 /**
  * gdk_window_get_origin:
  * @window: a #GdkWindow

gdk/gdkwindow.h

@@ -694,6 +694,8 @@ void	      gdk_window_get_geometry	 (GdkWindow	  *window,
 					  gint		  *width,
 					  gint		  *height,
 					  gint		  *depth);
+int           gdk_window_get_width       (GdkWindow       *window);
+int           gdk_window_get_height      (GdkWindow       *window);
 void	      gdk_window_get_position	 (GdkWindow	  *window,
 					  gint		  *x,
 					  gint		  *y);