Drop the gdk_display variable from gdk

This was the last exported variable; it wasn't multihead safe,
and there's easy replacement with gdk_display_get_default().
Also drop the GDK_DISPLAY() macro which was just a wrapper around
the variable.

docs/reference/gdk/gdk3-sections.txt

@@ -1006,7 +1006,6 @@ gdk_drag_context_get_type
 <TITLE>X Window System Interaction</TITLE>
 <FILE>x_interaction</FILE>
 GDK_ROOT_WINDOW
-GDK_DISPLAY
 GDK_WINDOW_XDISPLAY
 GDK_WINDOW_XID
 GDK_PIXMAP_XDISPLAY
@@ -1077,7 +1076,6 @@ gdk_x11_get_xatom_name
 gdk_x11_get_xatom_name_for_display
 
 <SUBSECTION Private>
-gdk_display
 GDK_HAVE_WCHAR_H
 GDK_HAVE_WCTYPE_H
 gdk_x11_pixmap_get_drawable_impl

gdk/gdk.symbols

@@ -1091,9 +1091,3 @@ gdk_app_launch_context_set_icon_name
 gdk_window_impl_get_type G_GNUC_CONST
 #endif
 #endif
-
-#ifdef GDK_WINDOWING_X11
-#ifdef INCLUDE_VARIABLES
-gdk_display
-#endif
-#endif

gdk/x11/gdkdisplay-x11.c

@@ -1968,12 +1968,7 @@ _gdk_windowing_set_default_display (GdkDisplay *display)
   const gchar *startup_id;
   
   if (!display)
-    {
-      gdk_display = NULL;
-      return;
-    }
-
-  gdk_display = GDK_DISPLAY_XDISPLAY (display);
+    return;
 
   g_free (display_x11->startup_notification_id);
   display_x11->startup_notification_id = NULL;

gdk/x11/gdkglobals-x11.c

@@ -32,6 +32,5 @@
 
 
 gboolean          _gdk_use_xshm = TRUE;  /* used as a cmd line arg */
-Display          *gdk_display = NULL;
 GdkAtom           _gdk_selection_property;
 gboolean          _gdk_synchronize = FALSE;

gdk/x11/gdkx.h

@@ -34,10 +34,6 @@
 
 G_BEGIN_DECLS
 
-#ifndef GDK_MULTIHEAD_SAFE
-extern Display          *gdk_display;
-#endif
-
 Display *gdk_x11_drawable_get_xdisplay    (GdkDrawable *drawable);
 XID      gdk_x11_drawable_get_xid         (GdkDrawable *drawable);
 GdkDrawable *gdk_x11_window_get_drawable_impl (GdkWindow *window);
@@ -67,10 +63,6 @@ gint     gdk_x11_get_default_screen       (void);
 #define GDK_CURSOR_XDISPLAY(cursor)   (gdk_x11_cursor_get_xdisplay (cursor))
 #define GDK_CURSOR_XCURSOR(cursor)    (gdk_x11_cursor_get_xcursor (cursor))
 
-#ifndef GDK_MULTIHEAD_SAFE
-#define GDK_DISPLAY()                 gdk_display
-#endif
-
 #ifdef GDK_COMPILATION
 
 #include "gdkprivate-x11.h"

modules/other/gail/gailwindow.c

@@ -664,10 +664,10 @@ get_window_desktop (Window window)
 
   if (_net_wm_desktop == None)
     _net_wm_desktop =
-		XInternAtom (gdk_display, "_NET_WM_DESKTOP", False);
+		XInternAtom (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), "_NET_WM_DESKTOP", False);
 
   gdk_error_trap_push ();
-  result = XGetWindowProperty (gdk_display, window, _net_wm_desktop,
+  result = XGetWindowProperty (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), window, _net_wm_desktop,
                                0, G_MAXLONG,
                                False, XA_CARDINAL,
                                &ret_type, &format, &nitems,
@@ -718,11 +718,11 @@ get_stacked_windows (GailScreenInfo *info)
 
   if (_net_client_list_stacking == None)
     _net_client_list_stacking =
-		XInternAtom (gdk_display, "_NET_CLIENT_LIST_STACKING", False);
+		XInternAtom (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), "_NET_CLIENT_LIST_STACKING", False);
 
   gdk_error_trap_push ();
   ret_type = None;
-  result = XGetWindowProperty (gdk_display,
+  result = XGetWindowProperty (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
                                GDK_WINDOW_XWINDOW (info->root_window),
                                _net_client_list_stacking,
                                0, G_MAXLONG,
@@ -919,11 +919,11 @@ init_gail_screen (GdkScreen *screen,
 
   get_stacked_windows (&gail_screens [screen_n]);
 
-  XGetWindowAttributes (gdk_display,
+  XGetWindowAttributes (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
 			GDK_WINDOW_XWINDOW (gail_screens [screen_n].root_window),
 			&attrs); 
 
-  XSelectInput (gdk_display,
+  XSelectInput (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
 		GDK_WINDOW_XWINDOW (gail_screens [screen_n].root_window),
 		attrs.your_event_mask | PropertyChangeMask);