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mutter/src/core/window-private.h
Robert Bragg 40e820f551 Add support for stacking X and Wayland windows together 
This breaks down the assumptions in stack-tracker.c and stack.c that
Mutter is only stacking X windows.

The stack tracker now tracks windows using a MetaStackWindow structure
which is a union with a type member so that X windows can be
distinguished from Wayland windows.

Some notable changes are:

Queued stack tracker operations that affect Wayland windows will not be
associated with an X serial number.

If an operation only affects a Wayland window and there are no queued
stack tracker operations ("unvalidated predictions") then the operation
is applied immediately since there is no server involved with changing
the stacking for Wayland windows.

The stack tracker can no longer respond to X events by turning them into
stack operations and discarding the predicted operations made prior to
that event because operations based on X events don't know anything
about the stacking of Wayland windows.

Instead of discarding old predictions the new approach is to trust the
predictions but whenever we receive an event from the server that
affects stacking we cross-reference with the predicted stack and check
for consistency. So e.g. if we have an event that says ADD window A then
we apply the predictions (up to the serial for that event) and verify
the predicted state includes a window A. Similarly if an event says
RAISE_ABOVE(B, C) we can apply the predictions (up to the serial for
that event) and verify that window B is above C.

If we ever receive spurious stacking events (with a serial older than we
would expect) or find an inconsistency (some things aren't possible to
predict from the compositor) then we hit a re-synchronization code-path
that will query the X server for the full stacking order and then use
that stack to walk through our combined stack and force the X windows to
match the just queried stack but avoiding disrupting the relative
stacking of Wayland windows. This will be relatively expensive but
shouldn't be hit for compositor initiated restacking operations where
our predictions should be accurate.

The code in core/stack.c that deals with synchronizing the window stack
with the X server had to be updated quite heavily. In general the patch
avoids changing the fundamental approach being used but most of the code
did need some amount of re-factoring to consider what re-stacking
operations actually involve X or not and when we need to restack X
windows we sometimes need to search for a suitable X sibling to restack
relative too since the closest siblings may be Wayland windows.
2013-08-10 19:13:49 -04:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* \file window-private.h Windows which Mutter manages
*
* Managing X windows.
* This file contains methods on this class which are available to
* routines in core but not outside it. (See window.h for the routines
* which the rest of the world is allowed to use.)
*/
/*
* Copyright (C) 2001 Havoc Pennington
* Copyright (C) 2002 Red Hat, Inc.
* Copyright (C) 2003, 2004 Rob Adams
* Copyright (C) 2004-2006 Elijah Newren
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef META_WINDOW_PRIVATE_H
#define META_WINDOW_PRIVATE_H
#include <config.h>
#include <meta/compositor.h>
#include <meta/window.h>
#include "screen-private.h"
#include <meta/util.h>
#include "stack.h"
#include "iconcache.h"
#include <X11/Xutil.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#ifdef HAVE_WAYLAND
#include "meta-wayland-private.h"
#endif
/* XXX: We should find a nicer approach to deal with the
* circular dependency we have with the current headers
* (meta-wayland-private.h which typedefs MetaWaylandSurface
* also includes window-private.h) */
#ifndef HAVE_META_WAYLAND_SURFACE_TYPE
typedef struct _MetaWaylandSurface MetaWaylandSurface;
#endif
typedef struct _MetaWindowQueue MetaWindowQueue;
typedef enum {
META_CLIENT_TYPE_UNKNOWN = 0,
META_CLIENT_TYPE_APPLICATION = 1,
META_CLIENT_TYPE_PAGER = 2,
META_CLIENT_TYPE_MAX_RECOGNIZED = 2
} MetaClientType;
typedef enum {
META_QUEUE_CALC_SHOWING = 1 << 0,
META_QUEUE_MOVE_RESIZE = 1 << 1,
META_QUEUE_UPDATE_ICON = 1 << 2,
} MetaQueueType;
#define NUMBER_OF_QUEUES 3
typedef enum {
_NET_WM_BYPASS_COMPOSITOR_HINT_AUTO = 0,
_NET_WM_BYPASS_COMPOSITOR_HINT_ON = 1,
_NET_WM_BYPASS_COMPOSITOR_HINT_OFF = 2,
} MetaBypassCompositorHintValue;
struct _MetaWindow
{
GObject parent_instance;
MetaDisplay *display;
MetaScreen *screen;
const MetaMonitorInfo *monitor;
MetaWorkspace *workspace;
MetaWindowClientType client_type;
#ifdef HAVE_WAYLAND
MetaWaylandSurface *surface;
#endif
Window xwindow;
/* may be NULL! not all windows get decorated */
MetaFrame *frame;
int depth;
Visual *xvisual;
Colormap colormap;
char *desc; /* used in debug spew */
char *title;
char *icon_name;
GdkPixbuf *icon;
GdkPixbuf *mini_icon;
MetaIconCache icon_cache;
Pixmap wm_hints_pixmap;
Pixmap wm_hints_mask;
MetaWindowType type;
Atom type_atom;
/* NOTE these five are not in UTF-8, we just treat them as random
* binary data
*/
char *res_class;
char *res_name;
char *role;
char *sm_client_id;
char *wm_client_machine;
char *startup_id;
char *mutter_hints;
char *gtk_theme_variant;
char *gtk_application_id;
char *gtk_unique_bus_name;
char *gtk_application_object_path;
char *gtk_window_object_path;
char *gtk_app_menu_object_path;
char *gtk_menubar_object_path;
int hide_titlebar_when_maximized;
int net_wm_pid;
Window xtransient_for;
Window xgroup_leader;
Window xclient_leader;
/* Initial workspace property */
int initial_workspace;
/* Initial timestamp property */
guint32 initial_timestamp;
/* Whether this is an override redirect window or not */
guint override_redirect : 1;
/* Whether we're maximized */
guint maximized_horizontally : 1;
guint maximized_vertically : 1;
/* Whether we have to maximize/minimize after placement */
guint maximize_horizontally_after_placement : 1;
guint maximize_vertically_after_placement : 1;
guint minimize_after_placement : 1;
/* The current or requested tile mode. If maximized_vertically is true,
* this is the current mode. If not, it is the mode which will be
* requested after the window grab is released */
guint tile_mode : 2;
/* The last "full" maximized/unmaximized state. We need to keep track of
* that to toggle between normal/tiled or maximized/tiled states. */
guint saved_maximize : 1;
int tile_monitor_number;
/* Whether we're shaded */
guint shaded : 1;
/* Whether we're fullscreen */
guint fullscreen : 1;
/* Whether the urgent flag of WM_HINTS is set */
guint wm_hints_urgent : 1;
/* Whether we have to fullscreen after placement */
guint fullscreen_after_placement : 1;
/* Area to cover when in fullscreen mode. If _NET_WM_FULLSCREEN_MONITORS has
* been overridden (via a client message), the window will cover the union of
* these monitors. If not, this is the single monitor which the window's
* origin is on. */
long fullscreen_monitors[4];
/* Whether we're trying to constrain the window to be fully onscreen */
guint require_fully_onscreen : 1;
/* Whether we're trying to constrain the window to be on a single monitor */
guint require_on_single_monitor : 1;
/* Whether we're trying to constrain the window's titlebar to be onscreen */
guint require_titlebar_visible : 1;
/* Whether we're sticky in the multi-workspace sense
* (vs. the not-scroll-with-viewport sense, we don't
* have no stupid viewports)
*/
guint on_all_workspaces : 1;
/* This is true if the client requested sticky, and implies on_all_workspaces == TRUE,
* however on_all_workspaces can be set TRUE for other internal reasons too, such as
* being override_redirect or being on the non-primary monitor. */
guint on_all_workspaces_requested : 1;
/* Minimize is the state controlled by the minimize button */
guint minimized : 1;
guint tab_unminimized : 1;
/* Whether the window is mapped; actual server-side state
* see also unmaps_pending
*/
guint mapped : 1;
/* Whether window has been hidden from view by lowering it to the bottom
* of window stack.
*/
guint hidden : 1;
/* Whether the compositor thinks the window is visible
*/
guint visible_to_compositor : 1;
/* When we next show or hide the window, what effect we should
* tell the compositor to perform.
*/
guint pending_compositor_effect : 4; /* MetaCompEffect */
/* Iconic is the state in WM_STATE; happens for workspaces/shading
* in addition to minimize
*/
guint iconic : 1;
/* initially_iconic is the WM_HINTS setting when we first manage
* the window. It's taken to mean initially minimized.
*/
guint initially_iconic : 1;
/* whether an initial workspace was explicitly set */
guint initial_workspace_set : 1;
/* whether an initial timestamp was explicitly set */
guint initial_timestamp_set : 1;
/* whether net_wm_user_time has been set yet */
guint net_wm_user_time_set : 1;
/* whether net_wm_icon_geometry has been set */
guint icon_geometry_set : 1;
/* These are the flags from WM_PROTOCOLS */
guint take_focus : 1;
guint delete_window : 1;
guint net_wm_ping : 1;
/* Globally active / No input */
guint input : 1;
/* MWM hints about features of window */
guint mwm_decorated : 1;
guint mwm_border_only : 1;
guint mwm_has_close_func : 1;
guint mwm_has_minimize_func : 1;
guint mwm_has_maximize_func : 1;
guint mwm_has_move_func : 1;
guint mwm_has_resize_func : 1;
/* Computed features of window */
guint decorated : 1;
guint border_only : 1;
guint always_sticky : 1;
guint has_close_func : 1;
guint has_minimize_func : 1;
guint has_maximize_func : 1;
guint has_shade_func : 1;
guint has_move_func : 1;
guint has_resize_func : 1;
guint has_fullscreen_func : 1;
/* Weird "_NET_WM_STATE_MODAL" flag */
guint wm_state_modal : 1;
/* TRUE if the client forced these on */
guint wm_state_skip_taskbar : 1;
guint wm_state_skip_pager : 1;
/* Computed whether to skip taskbar or not */
guint skip_taskbar : 1;
guint skip_pager : 1;
/* TRUE if client set these */
guint wm_state_above : 1;
guint wm_state_below : 1;
/* EWHH demands attention flag */
guint wm_state_demands_attention : 1;
/* TRUE iff window == window->display->focus_window */
guint has_focus : 1;
/* Have we placed this window? */
guint placed : 1;
/* Must we force_save_user_window_placement? */
guint force_save_user_rect : 1;
/* Is this not a transient of the focus window which is being denied focus? */
guint denied_focus_and_not_transient : 1;
/* Has this window not ever been shown yet? */
guint showing_for_first_time : 1;
/* Are we in meta_window_unmanage()? */
guint unmanaging : 1;
/* Are we in meta_window_new()? */
guint constructing : 1;
/* Are we in the various queues? (Bitfield: see META_WINDOW_IS_IN_QUEUE) */
guint is_in_queues : NUMBER_OF_QUEUES;
/* Used by keybindings.c */
guint keys_grabbed : 1; /* normal keybindings grabbed */
guint grab_on_frame : 1; /* grabs are on the frame */
guint all_keys_grabbed : 1; /* AnyKey grabbed */
/* Set if the reason for unmanaging the window is that
* it was withdrawn
*/
guint withdrawn : 1;
/* TRUE if constrain_position should calc placement.
* only relevant if !window->placed
*/
guint calc_placement : 1;
/* Transient parent is a root window */
guint transient_parent_is_root_window : 1;
/* Info on which props we got our attributes from */
guint using_net_wm_name : 1; /* vs. plain wm_name */
guint using_net_wm_visible_name : 1; /* tracked so we can clear it */
guint using_net_wm_icon_name : 1; /* vs. plain wm_icon_name */
guint using_net_wm_visible_icon_name : 1; /* tracked so we can clear it */
/* has a bounding shape mask */
guint has_shape : 1;
/* has an input shape mask */
guint has_input_shape : 1;
/* icon props have changed */
guint need_reread_icon : 1;
/* if TRUE, window was maximized at start of current grab op */
guint shaken_loose : 1;
/* if TRUE we have a grab on the focus click buttons */
guint have_focus_click_grab : 1;
/* if TRUE, application is buggy and SYNC resizing is turned off */
guint disable_sync : 1;
/* if TRUE, window is attached to its parent */
guint attached : 1;
/* whether or not the window is from a program running on another machine */
guint is_remote : 1;
/* if non-NULL, the bounds of the window frame */
cairo_region_t *frame_bounds;
/* if non-NULL, the opaque region _NET_WM_OPAQUE_REGION */
cairo_region_t *opaque_region;
/* if TRUE, the we have the new form of sync request counter which
* also handles application frames */
guint extended_sync_request_counter : 1;
/* Note: can be NULL */
GSList *struts;
#ifdef HAVE_XSYNC
/* XSync update counter */
XSyncCounter sync_request_counter;
gint64 sync_request_serial;
gint64 sync_request_wait_serial;
guint sync_request_timeout_id;
/* alarm monitoring client's _NET_WM_SYNC_REQUEST_COUNTER */
XSyncAlarm sync_request_alarm;
#endif
/* Number of UnmapNotify that are caused by us, if
* we get UnmapNotify with none pending then the client
* is withdrawing the window.
*/
int unmaps_pending;
/* See docs for meta_window_get_stable_sequence() */
guint32 stable_sequence;
/* set to the most recent user-interaction event timestamp that we
know about for this window */
guint32 net_wm_user_time;
/* window that gets updated net_wm_user_time values */
Window user_time_window;
/* The size we set the window to last (i.e. what we believe
* to be its actual size on the server). The x, y are
* the actual server-side x,y so are relative to the frame
* (meaning that they just hold the frame width and height)
* or the root window (meaning they specify the location
* of the top left of the inner window) as appropriate.
*/
MetaRectangle rect;
/* The geometry to restore when we unmaximize. The position is in
* root window coords, even if there's a frame, which contrasts with
* window->rect above. Note that this gives the position and size
* of the client window (i.e. ignoring the frame).
*/
MetaRectangle saved_rect;
/* This is the geometry the window had after the last user-initiated
* move/resize operations. We use this whenever we are moving the
* implicitly (for example, if we move to avoid a panel, we can snap
* back to this position if the panel moves again). Note that this
* gives the position and size of the client window (i.e. ignoring
* the frame).
*
* Position valid if user_has_moved, size valid if user_has_resized
*
* Position always in root coords, unlike window->rect.
*/
MetaRectangle user_rect;
/* Cached net_wm_icon_geometry */
MetaRectangle icon_geometry;
/* Requested geometry */
int border_width;
/* x/y/w/h here get filled with ConfigureRequest values */
XSizeHints size_hints;
/* Managed by stack.c */
MetaStackLayer layer;
int stack_position; /* see comment in stack.h */
/* Current dialog open for this window */
int dialog_pid;
/* maintained by group.c */
MetaGroup *group;
GObject *compositor_private;
/* Focused window that is (directly or indirectly) attached to this one */
MetaWindow *attached_focus_window;
/* The currently complementary tiled window, if any */
MetaWindow *tile_match;
/* Bypass compositor hints */
guint bypass_compositor;
};
struct _MetaWindowClass
{
GObjectClass parent_class;
void (*workspace_changed) (MetaWindow *window, int old_workspace);
void (*focus) (MetaWindow *window);
void (*raised) (MetaWindow *window);
void (*unmanaged) (MetaWindow *window);
};
/* These differ from window->has_foo_func in that they consider
* the dynamic window state such as "maximized", not just the
* window's type
*/
#define META_WINDOW_MAXIMIZED(w) ((w)->maximized_horizontally && \
(w)->maximized_vertically)
#define META_WINDOW_MAXIMIZED_VERTICALLY(w) ((w)->maximized_vertically)
#define META_WINDOW_MAXIMIZED_HORIZONTALLY(w) ((w)->maximized_horizontally)
#define META_WINDOW_TILED_SIDE_BY_SIDE(w) ((w)->maximized_vertically && \
!(w)->maximized_horizontally && \
(w)->tile_mode != META_TILE_NONE)
#define META_WINDOW_TILED_LEFT(w) (META_WINDOW_TILED_SIDE_BY_SIDE(w) && \
(w)->tile_mode == META_TILE_LEFT)
#define META_WINDOW_TILED_RIGHT(w) (META_WINDOW_TILED_SIDE_BY_SIDE(w) && \
(w)->tile_mode == META_TILE_RIGHT)
#define META_WINDOW_TILED_MAXIMIZED(w)(META_WINDOW_MAXIMIZED(w) && \
(w)->tile_mode == META_TILE_MAXIMIZED)
#define META_WINDOW_ALLOWS_MOVE(w) ((w)->has_move_func && !(w)->fullscreen)
#define META_WINDOW_ALLOWS_RESIZE_EXCEPT_HINTS(w) ((w)->has_resize_func && !META_WINDOW_MAXIMIZED (w) && !META_WINDOW_TILED_SIDE_BY_SIDE(w) && !(w)->fullscreen && !(w)->shaded)
#define META_WINDOW_ALLOWS_RESIZE(w) (META_WINDOW_ALLOWS_RESIZE_EXCEPT_HINTS (w) && \
(((w)->size_hints.min_width < (w)->size_hints.max_width) || \
((w)->size_hints.min_height < (w)->size_hints.max_height)))
#define META_WINDOW_ALLOWS_HORIZONTAL_RESIZE(w) (META_WINDOW_ALLOWS_RESIZE_EXCEPT_HINTS (w) && (w)->size_hints.min_width < (w)->size_hints.max_width)
#define META_WINDOW_ALLOWS_VERTICAL_RESIZE(w) (META_WINDOW_ALLOWS_RESIZE_EXCEPT_HINTS (w) && (w)->size_hints.min_height < (w)->size_hints.max_height)
MetaWindow* meta_window_new (MetaDisplay *display,
Window xwindow,
gboolean must_be_viewable);
MetaWindow* meta_window_new_with_attrs (MetaDisplay *display,
Window xwindow,
gboolean must_be_viewable,
MetaCompEffect effect,
XWindowAttributes *attrs);
MetaWindow *meta_window_new_for_wayland (MetaDisplay *display,
int width,
int height,
MetaWaylandSurface *surface);
void meta_window_unmanage (MetaWindow *window,
guint32 timestamp);
void meta_window_calc_showing (MetaWindow *window);
void meta_window_queue (MetaWindow *window,
guint queuebits);
void meta_window_tile (MetaWindow *window);
void meta_window_maximize_internal (MetaWindow *window,
MetaMaximizeFlags directions,
MetaRectangle *saved_rect);
void meta_window_unmaximize_with_gravity (MetaWindow *window,
MetaMaximizeFlags directions,
int new_width,
int new_height,
int gravity);
void meta_window_make_fullscreen_internal (MetaWindow *window);
void meta_window_update_fullscreen_monitors (MetaWindow *window,
unsigned long top,
unsigned long bottom,
unsigned long left,
unsigned long right);
/* args to move are window pos, not frame pos */
void meta_window_move (MetaWindow *window,
gboolean user_op,
int root_x_nw,
int root_y_nw);
void meta_window_resize (MetaWindow *window,
gboolean user_op,
int w,
int h);
void meta_window_move_resize (MetaWindow *window,
gboolean user_op,
int root_x_nw,
int root_y_nw,
int w,
int h);
void meta_window_resize_with_gravity (MetaWindow *window,
gboolean user_op,
int w,
int h,
int gravity);
void meta_window_change_workspace (MetaWindow *window,
MetaWorkspace *workspace);
/* Return whether the window should be currently mapped */
gboolean meta_window_should_be_showing (MetaWindow *window);
/* See warning in window.c about this function */
gboolean __window_is_terminal (MetaWindow *window);
void meta_window_update_struts (MetaWindow *window);
/* this gets root coords */
void meta_window_get_position (MetaWindow *window,
int *x,
int *y);
/* Gets root coords for x, y, width & height of client window; uses
* meta_window_get_position for x & y.
*/
void meta_window_get_client_root_coords (MetaWindow *window,
MetaRectangle *rect);
/* gets position we need to set to stay in current position,
* assuming position will be gravity-compensated. i.e.
* this is the position a client would send in a configure
* request.
*/
void meta_window_get_gravity_position (MetaWindow *window,
int gravity,
int *x,
int *y);
/* Get geometry for saving in the session; x/y are gravity
* position, and w/h are in resize inc above the base size.
*/
void meta_window_get_geometry (MetaWindow *window,
int *x,
int *y,
int *width,
int *height);
void meta_window_update_unfocused_button_grabs (MetaWindow *window);
/* Sends a client message */
void meta_window_send_icccm_message (MetaWindow *window,
Atom atom,
guint32 timestamp);
void meta_window_move_resize_request(MetaWindow *window,
guint value_mask,
int gravity,
int x,
int y,
int width,
int height);
gboolean meta_window_configure_request (MetaWindow *window,
XEvent *event);
gboolean meta_window_property_notify (MetaWindow *window,
XEvent *event);
gboolean meta_window_client_message (MetaWindow *window,
XEvent *event);
void meta_window_set_focused_internal (MetaWindow *window,
gboolean focused);
void meta_window_set_current_workspace_hint (MetaWindow *window);
unsigned long meta_window_get_net_wm_desktop (MetaWindow *window);
void meta_window_show_menu (MetaWindow *window,
int root_x,
int root_y,
int button,
guint32 timestamp);
gboolean meta_window_titlebar_is_onscreen (MetaWindow *window);
void meta_window_shove_titlebar_onscreen (MetaWindow *window);
void meta_window_set_gravity (MetaWindow *window,
int gravity);
#ifdef HAVE_XSYNC
void meta_window_update_sync_request_counter (MetaWindow *window,
gint64 new_counter_value);
#endif /* HAVE_XSYNC */
void meta_window_handle_mouse_grab_op_event (MetaWindow *window,
XIDeviceEvent *xev);
GList* meta_window_get_workspaces (MetaWindow *window);
void meta_window_get_current_tile_area (MetaWindow *window,
MetaRectangle *tile_area);
gboolean meta_window_same_application (MetaWindow *window,
MetaWindow *other_window);
#define META_WINDOW_IN_NORMAL_TAB_CHAIN_TYPE(w) \
((w)->type != META_WINDOW_DOCK && (w)->type != META_WINDOW_DESKTOP)
#define META_WINDOW_IN_NORMAL_TAB_CHAIN(w) \
(((w)->input || (w)->take_focus ) && META_WINDOW_IN_NORMAL_TAB_CHAIN_TYPE (w) && (!(w)->skip_taskbar))
#define META_WINDOW_IN_DOCK_TAB_CHAIN(w) \
(((w)->input || (w)->take_focus) && (! META_WINDOW_IN_NORMAL_TAB_CHAIN_TYPE (w) || (w)->skip_taskbar))
#define META_WINDOW_IN_GROUP_TAB_CHAIN(w, g) \
(((w)->input || (w)->take_focus) && (!g || meta_window_get_group(w)==g))
void meta_window_refresh_resize_popup (MetaWindow *window);
void meta_window_free_delete_dialog (MetaWindow *window);
void meta_window_create_sync_request_alarm (MetaWindow *window);
void meta_window_destroy_sync_request_alarm (MetaWindow *window);
void meta_window_update_keyboard_resize (MetaWindow *window,
gboolean update_cursor);
void meta_window_update_keyboard_move (MetaWindow *window);
void meta_window_update_layer (MetaWindow *window);
void meta_window_recalc_features (MetaWindow *window);
void meta_window_recalc_window_type (MetaWindow *window);
void meta_window_stack_just_below (MetaWindow *window,
MetaWindow *below_this_one);
void meta_window_set_user_time (MetaWindow *window,
guint32 timestamp);
void meta_window_update_icon_now (MetaWindow *window);
void meta_window_update_role (MetaWindow *window);
void meta_window_update_net_wm_type (MetaWindow *window);
void meta_window_update_opaque_region (MetaWindow *window);
void meta_window_update_for_monitors_changed (MetaWindow *window);
void meta_window_update_on_all_workspaces (MetaWindow *window);
void meta_window_propagate_focus_appearance (MetaWindow *window,
gboolean focused);
gboolean meta_window_should_attach_to_parent (MetaWindow *window);
gboolean meta_window_can_tile_side_by_side (MetaWindow *window);
void meta_window_compute_tile_match (MetaWindow *window);
gboolean meta_window_updates_are_frozen (MetaWindow *window);
#endif
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