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mutter-performance-source/src/core/screen.c
Florian Müllner 98d77d37d0 screen: Make sure to initialize NUMBER_OF_DESKTOPS 
update_num_workspaces() is a no-op when the number of workspaces
did not actually change. That is fine, except that we still want
to initialize the _NET_NUMBER_OF_DESKTOPS hint on startup to not
break components like nautilus-desktop that rely on it.

https://bugzilla.gnome.org/show_bug.cgi?id=760651
2017-10-04 00:07:34 +02:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2001, 2002 Havoc Pennington
* Copyright (C) 2002, 2003 Red Hat Inc.
* Some ICCCM manager selection code derived from fvwm2,
* Copyright (C) 2001 Dominik Vogt, Matthias Clasen, and fvwm2 team
* Copyright (C) 2003 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, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:screen
* @title: MetaScreen
* @short_description: Mutter X screen handler
*/
#include <config.h>
#include "screen-private.h"
#include <meta/main.h>
#include "util-private.h"
#include <meta/errors.h>
#include "window-private.h"
#include "frame.h"
#include <meta/prefs.h>
#include "workspace-private.h"
#include "keybindings-private.h"
#include "stack.h"
#include <meta/compositor.h>
#include <meta/meta-enum-types.h>
#include "core.h"
#include "meta-cursor-tracker-private.h"
#include "boxes-private.h"
#include "backends/meta-backend-private.h"
#include "backends/meta-logical-monitor.h"
#include <X11/extensions/Xinerama.h>
#include <X11/extensions/Xcomposite.h>
#include <X11/Xatom.h>
#include <locale.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "x11/window-x11.h"
#include "x11/xprops.h"
#include "backends/x11/meta-backend-x11.h"
static char* get_screen_name (MetaDisplay *display,
int number);
static void update_num_workspaces (MetaScreen *screen,
guint32 timestamp);
static void set_workspace_names (MetaScreen *screen);
static void prefs_changed_callback (MetaPreference pref,
gpointer data);
static void set_desktop_geometry_hint (MetaScreen *screen);
static void set_desktop_viewport_hint (MetaScreen *screen);
static void on_monitors_changed (MetaMonitorManager *manager,
MetaScreen *screen);
enum
{
PROP_N_WORKSPACES = 1,
};
enum
{
RESTACKED,
WORKSPACE_ADDED,
WORKSPACE_REMOVED,
WORKSPACE_SWITCHED,
WINDOW_ENTERED_MONITOR,
WINDOW_LEFT_MONITOR,
STARTUP_SEQUENCE_CHANGED,
WORKAREAS_CHANGED,
MONITORS_CHANGED,
IN_FULLSCREEN_CHANGED,
LAST_SIGNAL
};
static guint screen_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (MetaScreen, meta_screen, G_TYPE_OBJECT);
static GQuark quark_screen_x11_logical_monitor_data = 0;
typedef struct _MetaScreenX11LogicalMonitorData
{
int xinerama_index;
} MetaScreenX11LogicalMonitorData;
static void
meta_screen_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
#if 0
MetaScreen *screen = META_SCREEN (object);
#endif
switch (prop_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_screen_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaScreen *screen = META_SCREEN (object);
switch (prop_id)
{
case PROP_N_WORKSPACES:
g_value_set_int (value, meta_screen_get_n_workspaces (screen));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_screen_finalize (GObject *object)
{
/* Actual freeing done in meta_screen_free() for now */
}
static void
meta_screen_class_init (MetaScreenClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
object_class->get_property = meta_screen_get_property;
object_class->set_property = meta_screen_set_property;
object_class->finalize = meta_screen_finalize;
screen_signals[RESTACKED] =
g_signal_new ("restacked",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MetaScreenClass, restacked),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pspec = g_param_spec_int ("n-workspaces",
"N Workspaces",
"Number of workspaces",
1, G_MAXINT, 1,
G_PARAM_READABLE);
screen_signals[WORKSPACE_ADDED] =
g_signal_new ("workspace-added",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE,
1,
G_TYPE_INT);
screen_signals[WORKSPACE_REMOVED] =
g_signal_new ("workspace-removed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE,
1,
G_TYPE_INT);
screen_signals[WORKSPACE_SWITCHED] =
g_signal_new ("workspace-switched",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE,
3,
G_TYPE_INT,
G_TYPE_INT,
META_TYPE_MOTION_DIRECTION);
screen_signals[WINDOW_ENTERED_MONITOR] =
g_signal_new ("window-entered-monitor",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 2,
G_TYPE_INT,
META_TYPE_WINDOW);
screen_signals[WINDOW_LEFT_MONITOR] =
g_signal_new ("window-left-monitor",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 2,
G_TYPE_INT,
META_TYPE_WINDOW);
screen_signals[STARTUP_SEQUENCE_CHANGED] =
g_signal_new ("startup-sequence-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 1, G_TYPE_POINTER);
screen_signals[WORKAREAS_CHANGED] =
g_signal_new ("workareas-changed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MetaScreenClass, workareas_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
screen_signals[MONITORS_CHANGED] =
g_signal_new ("monitors-changed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MetaScreenClass, monitors_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
screen_signals[IN_FULLSCREEN_CHANGED] =
g_signal_new ("in-fullscreen-changed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
g_object_class_install_property (object_class,
PROP_N_WORKSPACES,
pspec);
quark_screen_x11_logical_monitor_data =
g_quark_from_static_string ("-meta-screen-logical-monitor-x11-data");
}
static void
meta_screen_init (MetaScreen *screen)
{
}
static int
set_wm_check_hint (MetaScreen *screen)
{
unsigned long data[1];
g_return_val_if_fail (screen->display->leader_window != None, 0);
data[0] = screen->display->leader_window;
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_SUPPORTING_WM_CHECK,
XA_WINDOW,
32, PropModeReplace, (guchar*) data, 1);
return Success;
}
static void
unset_wm_check_hint (MetaScreen *screen)
{
XDeleteProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_SUPPORTING_WM_CHECK);
}
static int
set_supported_hint (MetaScreen *screen)
{
Atom atoms[] = {
#define EWMH_ATOMS_ONLY
#define item(x) screen->display->atom_##x,
#include <x11/atomnames.h>
#undef item
#undef EWMH_ATOMS_ONLY
screen->display->atom__GTK_FRAME_EXTENTS,
screen->display->atom__GTK_SHOW_WINDOW_MENU,
};
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_SUPPORTED,
XA_ATOM,
32, PropModeReplace,
(guchar*) atoms, G_N_ELEMENTS(atoms));
return Success;
}
static int
set_wm_icon_size_hint (MetaScreen *screen)
{
#define N_VALS 6
gulong vals[N_VALS];
/* We've bumped the real icon size up to 96x96, but
* we really should not add these sorts of constraints
* on clients still using the legacy WM_HINTS interface.
*/
#define LEGACY_ICON_SIZE 32
/* min width, min height, max w, max h, width inc, height inc */
vals[0] = LEGACY_ICON_SIZE;
vals[1] = LEGACY_ICON_SIZE;
vals[2] = LEGACY_ICON_SIZE;
vals[3] = LEGACY_ICON_SIZE;
vals[4] = 0;
vals[5] = 0;
#undef LEGACY_ICON_SIZE
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom_WM_ICON_SIZE,
XA_CARDINAL,
32, PropModeReplace, (guchar*) vals, N_VALS);
return Success;
#undef N_VALS
}
static MetaScreenX11LogicalMonitorData *
get_screen_x11_logical_monitor_data (MetaLogicalMonitor *logical_monitor)
{
return g_object_get_qdata (G_OBJECT (logical_monitor),
quark_screen_x11_logical_monitor_data);
}
static MetaScreenX11LogicalMonitorData *
ensure_screen_x11_logical_monitor_data (MetaLogicalMonitor *logical_monitor)
{
MetaScreenX11LogicalMonitorData *data;
data = get_screen_x11_logical_monitor_data (logical_monitor);
if (data)
return data;
data = g_new0 (MetaScreenX11LogicalMonitorData, 1);
g_object_set_qdata_full (G_OBJECT (logical_monitor),
quark_screen_x11_logical_monitor_data,
data,
g_free);
return data;
}
static void
meta_screen_ensure_xinerama_indices (MetaScreen *screen)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
GList *logical_monitors, *l;
XineramaScreenInfo *infos;
int n_infos, j;
if (screen->has_xinerama_indices)
return;
screen->has_xinerama_indices = TRUE;
if (!XineramaIsActive (screen->display->xdisplay))
return;
infos = XineramaQueryScreens (screen->display->xdisplay, &n_infos);
if (n_infos <= 0 || infos == NULL)
{
meta_XFree (infos);
return;
}
logical_monitors =
meta_monitor_manager_get_logical_monitors (monitor_manager);
for (l = logical_monitors; l; l = l->next)
{
MetaLogicalMonitor *logical_monitor = l->data;
for (j = 0; j < n_infos; ++j)
{
if (logical_monitor->rect.x == infos[j].x_org &&
logical_monitor->rect.y == infos[j].y_org &&
logical_monitor->rect.width == infos[j].width &&
logical_monitor->rect.height == infos[j].height)
{
MetaScreenX11LogicalMonitorData *logical_monitor_data;
logical_monitor_data =
ensure_screen_x11_logical_monitor_data (logical_monitor);
logical_monitor_data->xinerama_index = j;
}
}
}
meta_XFree (infos);
}
int
meta_screen_logical_monitor_to_xinerama_index (MetaScreen *screen,
MetaLogicalMonitor *logical_monitor)
{
MetaScreenX11LogicalMonitorData *logical_monitor_data;
g_return_val_if_fail (logical_monitor, -1);
meta_screen_ensure_xinerama_indices (screen);
logical_monitor_data = get_screen_x11_logical_monitor_data (logical_monitor);
return logical_monitor_data->xinerama_index;
}
MetaLogicalMonitor *
meta_screen_xinerama_index_to_logical_monitor (MetaScreen *screen,
int xinerama_index)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
GList *logical_monitors, *l;
meta_screen_ensure_xinerama_indices (screen);
logical_monitors =
meta_monitor_manager_get_logical_monitors (monitor_manager);
for (l = logical_monitors; l; l = l->next)
{
MetaLogicalMonitor *logical_monitor = l->data;
MetaScreenX11LogicalMonitorData *logical_monitor_data;
logical_monitor_data =
ensure_screen_x11_logical_monitor_data (logical_monitor);
if (logical_monitor_data->xinerama_index == xinerama_index)
return logical_monitor;
}
return NULL;
}
static void
reload_logical_monitors (MetaScreen *screen)
{
GList *l;
for (l = screen->workspaces; l != NULL; l = l->next)
{
MetaWorkspace *space = l->data;
meta_workspace_invalidate_work_area (space);
}
screen->has_xinerama_indices = FALSE;
}
/* The guard window allows us to leave minimized windows mapped so
* that compositor code may provide live previews of them.
* Instead of being unmapped/withdrawn, they get pushed underneath
* the guard window. We also select events on the guard window, which
* should effectively be forwarded to events on the background actor,
* providing that the scene graph is set up correctly.
*/
static Window
create_guard_window (Display *xdisplay, MetaScreen *screen)
{
XSetWindowAttributes attributes;
Window guard_window;
gulong create_serial;
attributes.event_mask = NoEventMask;
attributes.override_redirect = True;
/* We have to call record_add() after we have the new window ID,
* so save the serial for the CreateWindow request until then */
create_serial = XNextRequest(xdisplay);
guard_window =
XCreateWindow (xdisplay,
screen->xroot,
0, /* x */
0, /* y */
screen->rect.width,
screen->rect.height,
0, /* border width */
0, /* depth */
InputOnly, /* class */
CopyFromParent, /* visual */
CWEventMask|CWOverrideRedirect,
&attributes);
/* https://bugzilla.gnome.org/show_bug.cgi?id=710346 */
XStoreName (xdisplay, guard_window, "mutter guard window");
{
if (!meta_is_wayland_compositor ())
{
MetaBackendX11 *backend = META_BACKEND_X11 (meta_get_backend ());
Display *backend_xdisplay = meta_backend_x11_get_xdisplay (backend);
unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
XISetMask (mask.mask, XI_ButtonPress);
XISetMask (mask.mask, XI_ButtonRelease);
XISetMask (mask.mask, XI_Motion);
/* Sync on the connection we created the window on to
* make sure it's created before we select on it on the
* backend connection. */
XSync (xdisplay, False);
XISelectEvents (backend_xdisplay, guard_window, &mask, 1);
}
}
meta_stack_tracker_record_add (screen->stack_tracker,
guard_window,
create_serial);
meta_stack_tracker_lower (screen->stack_tracker,
guard_window);
XMapWindow (xdisplay, guard_window);
return guard_window;
}
static Window
take_manager_selection (MetaDisplay *display,
Window xroot,
Atom manager_atom,
int timestamp,
gboolean should_replace)
{
Display *xdisplay = display->xdisplay;
Window current_owner, new_owner;
current_owner = XGetSelectionOwner (xdisplay, manager_atom);
if (current_owner != None)
{
XSetWindowAttributes attrs;
if (should_replace)
{
/* We want to find out when the current selection owner dies */
meta_error_trap_push (display);
attrs.event_mask = StructureNotifyMask;
XChangeWindowAttributes (xdisplay, current_owner, CWEventMask, &attrs);
if (meta_error_trap_pop_with_return (display) != Success)
current_owner = None; /* don't wait for it to die later on */
}
else
{
meta_warning (_("Display “%s” already has a window manager; try using the --replace option to replace the current window manager."),
display->name);
return None;
}
}
/* We need SelectionClear and SelectionRequest events on the new owner,
* but those cannot be masked, so we only need NoEventMask.
*/
new_owner = meta_create_offscreen_window (xdisplay, xroot, NoEventMask);
XSetSelectionOwner (xdisplay, manager_atom, new_owner, timestamp);
if (XGetSelectionOwner (xdisplay, manager_atom) != new_owner)
{
meta_warning ("Could not acquire selection: %s", XGetAtomName (xdisplay, manager_atom));
return None;
}
{
/* Send client message indicating that we are now the selection owner */
XClientMessageEvent ev;
ev.type = ClientMessage;
ev.window = xroot;
ev.message_type = display->atom_MANAGER;
ev.format = 32;
ev.data.l[0] = timestamp;
ev.data.l[1] = manager_atom;
XSendEvent (xdisplay, xroot, False, StructureNotifyMask, (XEvent *) &ev);
}
/* Wait for old window manager to go away */
if (current_owner != None)
{
XEvent event;
/* We sort of block infinitely here which is probably lame. */
meta_verbose ("Waiting for old window manager to exit\n");
do
XWindowEvent (xdisplay, current_owner, StructureNotifyMask, &event);
while (event.type != DestroyNotify);
}
return new_owner;
}
MetaScreen*
meta_screen_new (MetaDisplay *display,
guint32 timestamp)
{
MetaScreen *screen;
int number;
Screen *xscreen;
Window xroot;
Display *xdisplay;
Window new_wm_sn_owner;
gboolean replace_current_wm;
Atom wm_sn_atom;
char buf[128];
MetaMonitorManager *manager;
replace_current_wm = meta_get_replace_current_wm ();
number = meta_ui_get_screen_number ();
/* Only display->name, display->xdisplay, and display->error_traps
* can really be used in this function, since normally screens are
* created from the MetaDisplay constructor
*/
xdisplay = display->xdisplay;
meta_verbose ("Trying screen %d on display '%s'\n",
number, display->name);
xroot = RootWindow (xdisplay, number);
/* FVWM checks for None here, I don't know if this
* ever actually happens
*/
if (xroot == None)
{
meta_warning (_("Screen %d on display “%s” is invalid\n"),
number, display->name);
return NULL;
}
sprintf (buf, "WM_S%d", number);
wm_sn_atom = XInternAtom (xdisplay, buf, False);
new_wm_sn_owner = take_manager_selection (display, xroot, wm_sn_atom, timestamp, replace_current_wm);
if (new_wm_sn_owner == None)
return NULL;
{
long event_mask;
unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
XISetMask (mask.mask, XI_Enter);
XISetMask (mask.mask, XI_Leave);
XISetMask (mask.mask, XI_FocusIn);
XISetMask (mask.mask, XI_FocusOut);
#ifdef HAVE_XI23
if (META_DISPLAY_HAS_XINPUT_23 (display))
{
XISetMask (mask.mask, XI_BarrierHit);
XISetMask (mask.mask, XI_BarrierLeave);
}
#endif /* HAVE_XI23 */
XISelectEvents (xdisplay, xroot, &mask, 1);
event_mask = (SubstructureRedirectMask | SubstructureNotifyMask |
StructureNotifyMask | ColormapChangeMask | PropertyChangeMask);
XSelectInput (xdisplay, xroot, event_mask);
}
/* Select for cursor changes so the cursor tracker is up to date. */
XFixesSelectCursorInput (xdisplay, xroot, XFixesDisplayCursorNotifyMask);
screen = g_object_new (META_TYPE_SCREEN, NULL);
screen->closing = 0;
screen->display = display;
screen->screen_name = get_screen_name (display, number);
screen->xroot = xroot;
screen->rect.x = screen->rect.y = 0;
manager = meta_monitor_manager_get ();
g_signal_connect (manager, "monitors-changed",
G_CALLBACK (on_monitors_changed), screen);
meta_monitor_manager_get_screen_size (manager,
&screen->rect.width,
&screen->rect.height);
xscreen = ScreenOfDisplay (xdisplay, number);
screen->current_cursor = -1; /* invalid/unset */
screen->default_xvisual = DefaultVisualOfScreen (xscreen);
screen->default_depth = DefaultDepthOfScreen (xscreen);
screen->wm_sn_selection_window = new_wm_sn_owner;
screen->wm_sn_atom = wm_sn_atom;
screen->wm_sn_timestamp = timestamp;
screen->work_area_later = 0;
screen->check_fullscreen_later = 0;
screen->active_workspace = NULL;
screen->workspaces = NULL;
screen->rows_of_workspaces = 1;
screen->columns_of_workspaces = -1;
screen->vertical_workspaces = FALSE;
screen->starting_corner = META_SCREEN_TOPLEFT;
screen->guard_window = None;
/* If we're a Wayland compositor, then we don't grab the COW, since it
* will map it. */
if (!meta_is_wayland_compositor ())
screen->composite_overlay_window = XCompositeGetOverlayWindow (xdisplay, xroot);
/* Now that we've gotten taken a reference count on the COW, we
* can close the helper that is holding on to it */
meta_restart_finish ();
reload_logical_monitors (screen);
meta_screen_set_cursor (screen, META_CURSOR_DEFAULT);
/* Handle creating a no_focus_window for this screen */
screen->no_focus_window =
meta_create_offscreen_window (display->xdisplay,
screen->xroot,
FocusChangeMask|KeyPressMask|KeyReleaseMask);
XMapWindow (display->xdisplay, screen->no_focus_window);
/* Done with no_focus_window stuff */
set_wm_icon_size_hint (screen);
set_supported_hint (screen);
set_wm_check_hint (screen);
set_desktop_viewport_hint (screen);
set_desktop_geometry_hint (screen);
meta_screen_update_workspace_layout (screen);
/* Screens must have at least one workspace at all times,
* so create that required workspace.
*/
meta_workspace_new (screen);
screen->keys_grabbed = FALSE;
meta_screen_grab_keys (screen);
screen->ui = meta_ui_new (screen->display->xdisplay);
screen->tile_preview_timeout_id = 0;
screen->stack = meta_stack_new (screen);
screen->stack_tracker = meta_stack_tracker_new (screen);
meta_prefs_add_listener (prefs_changed_callback, screen);
meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
number, screen->screen_name, screen->xroot);
return screen;
}
void
meta_screen_init_workspaces (MetaScreen *screen)
{
MetaWorkspace *current_workspace;
uint32_t current_workspace_index = 0;
guint32 timestamp;
g_return_if_fail (META_IS_SCREEN (screen));
timestamp = screen->wm_sn_timestamp;
/* Get current workspace */
if (meta_prop_get_cardinal (screen->display,
screen->xroot,
screen->display->atom__NET_CURRENT_DESKTOP,
&current_workspace_index))
meta_verbose ("Read existing _NET_CURRENT_DESKTOP = %d\n",
(int) current_workspace_index);
else
meta_verbose ("No _NET_CURRENT_DESKTOP present\n");
update_num_workspaces (screen, timestamp);
set_workspace_names (screen);
/* Switch to the _NET_CURRENT_DESKTOP workspace */
current_workspace = meta_screen_get_workspace_by_index (screen,
current_workspace_index);
if (current_workspace != NULL)
meta_workspace_activate (current_workspace, timestamp);
else
meta_workspace_activate (screen->workspaces->data, timestamp);
}
void
meta_screen_free (MetaScreen *screen,
guint32 timestamp)
{
MetaDisplay *display;
display = screen->display;
screen->closing += 1;
meta_compositor_unmanage (screen->display->compositor);
meta_display_unmanage_windows_for_screen (display, screen, timestamp);
meta_prefs_remove_listener (prefs_changed_callback, screen);
meta_screen_ungrab_keys (screen);
meta_ui_free (screen->ui);
meta_stack_free (screen->stack);
meta_stack_tracker_free (screen->stack_tracker);
meta_error_trap_push (screen->display);
XSelectInput (screen->display->xdisplay, screen->xroot, 0);
if (meta_error_trap_pop_with_return (screen->display) != Success)
meta_warning ("Could not release screen %d on display \"%s\"\n",
meta_ui_get_screen_number (), screen->display->name);
unset_wm_check_hint (screen);
XDestroyWindow (screen->display->xdisplay,
screen->wm_sn_selection_window);
if (screen->work_area_later != 0)
meta_later_remove (screen->work_area_later);
if (screen->check_fullscreen_later != 0)
meta_later_remove (screen->check_fullscreen_later);
if (screen->tile_preview_timeout_id)
g_source_remove (screen->tile_preview_timeout_id);
g_free (screen->screen_name);
g_object_unref (screen);
}
void
meta_screen_create_guard_window (MetaScreen *screen)
{
if (screen->guard_window == None)
screen->guard_window = create_guard_window (screen->display->xdisplay, screen);
}
void
meta_screen_manage_all_windows (MetaScreen *screen)
{
guint64 *_children;
guint64 *children;
int n_children, i;
meta_stack_freeze (screen->stack);
meta_stack_tracker_get_stack (screen->stack_tracker, &_children, &n_children);
/* Copy the stack as it will be modified as part of the loop */
children = g_memdup (_children, sizeof (guint64) * n_children);
for (i = 0; i < n_children; ++i)
{
g_assert (META_STACK_ID_IS_X11 (children[i]));
meta_window_x11_new (screen->display, children[i], TRUE,
META_COMP_EFFECT_NONE);
}
g_free (children);
meta_stack_thaw (screen->stack);
}
static void
prefs_changed_callback (MetaPreference pref,
gpointer data)
{
MetaScreen *screen = data;
if ((pref == META_PREF_NUM_WORKSPACES ||
pref == META_PREF_DYNAMIC_WORKSPACES) &&
!meta_prefs_get_dynamic_workspaces ())
{
/* GSettings doesn't provide timestamps, but luckily update_num_workspaces
* often doesn't need it...
*/
guint32 timestamp =
meta_display_get_current_time_roundtrip (screen->display);
update_num_workspaces (screen, timestamp);
}
else if (pref == META_PREF_WORKSPACE_NAMES)
{
set_workspace_names (screen);
}
}
static char*
get_screen_name (MetaDisplay *display,
int number)
{
char *p;
char *dname;
char *scr;
/* DisplayString gives us a sort of canonical display,
* vs. the user-entered name from XDisplayName()
*/
dname = g_strdup (DisplayString (display->xdisplay));
/* Change display name to specify this screen.
*/
p = strrchr (dname, ':');
if (p)
{
p = strchr (p, '.');
if (p)
*p = '\0';
}
scr = g_strdup_printf ("%s.%d", dname, number);
g_free (dname);
return scr;
}
void
meta_screen_foreach_window (MetaScreen *screen,
MetaListWindowsFlags flags,
MetaScreenWindowFunc func,
gpointer data)
{
GSList *windows;
/* If we end up doing this often, just keeping a list
* of windows might be sensible.
*/
windows = meta_display_list_windows (screen->display, flags);
g_slist_foreach (windows, (GFunc) func, data);
g_slist_free (windows);
}
int
meta_screen_get_n_workspaces (MetaScreen *screen)
{
return g_list_length (screen->workspaces);
}
/**
* meta_screen_get_workspace_by_index:
* @screen: a #MetaScreen
* @index: index of one of the screen's workspaces
*
* Gets the workspace object for one of a screen's workspaces given the workspace
* index. It's valid to call this function with an out-of-range index and it
* will robustly return %NULL.
*
* Return value: (transfer none): the workspace object with specified index, or %NULL
* if the index is out of range.
*/
MetaWorkspace*
meta_screen_get_workspace_by_index (MetaScreen *screen,
int idx)
{
return g_list_nth_data (screen->workspaces, idx);
}
static void
set_number_of_spaces_hint (MetaScreen *screen,
int n_spaces)
{
unsigned long data[1];
if (screen->closing > 0)
return;
data[0] = n_spaces;
meta_verbose ("Setting _NET_NUMBER_OF_DESKTOPS to %lu\n", data[0]);
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_NUMBER_OF_DESKTOPS,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
meta_error_trap_pop (screen->display);
}
static void
set_desktop_geometry_hint (MetaScreen *screen)
{
unsigned long data[2];
if (screen->closing > 0)
return;
data[0] = screen->rect.width;
data[1] = screen->rect.height;
meta_verbose ("Setting _NET_DESKTOP_GEOMETRY to %lu, %lu\n", data[0], data[1]);
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_DESKTOP_GEOMETRY,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 2);
meta_error_trap_pop (screen->display);
}
static void
set_desktop_viewport_hint (MetaScreen *screen)
{
unsigned long data[2];
if (screen->closing > 0)
return;
/*
* Mutter does not implement viewports, so this is a fixed 0,0
*/
data[0] = 0;
data[1] = 0;
meta_verbose ("Setting _NET_DESKTOP_VIEWPORT to 0, 0\n");
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_DESKTOP_VIEWPORT,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 2);
meta_error_trap_pop (screen->display);
}
void
meta_screen_remove_workspace (MetaScreen *screen, MetaWorkspace *workspace,
guint32 timestamp)
{
GList *l;
GList *next;
MetaWorkspace *neighbour = NULL;
int index;
gboolean active_index_changed;
int new_num;
l = g_list_find (screen->workspaces, workspace);
if (!l)
return;
next = l->next;
if (l->prev)
neighbour = l->prev->data;
else if (l->next)
neighbour = l->next->data;
else
{
/* Cannot remove the only workspace! */
return;
}
meta_workspace_relocate_windows (workspace, neighbour);
if (workspace == screen->active_workspace)
meta_workspace_activate (neighbour, timestamp);
/* To emit the signal after removing the workspace */
index = meta_workspace_index (workspace);
active_index_changed = index < meta_screen_get_active_workspace_index (screen);
/* This also removes the workspace from the screens list */
meta_workspace_remove (workspace);
new_num = g_list_length (screen->workspaces);
set_number_of_spaces_hint (screen, new_num);
if (!meta_prefs_get_dynamic_workspaces ())
meta_prefs_set_num_workspaces (new_num);
/* If deleting a workspace before the current workspace, the active
* workspace index changes, so we need to update that hint */
if (active_index_changed)
meta_screen_set_active_workspace_hint (screen);
for (l = next; l != NULL; l = l->next)
{
MetaWorkspace *w = l->data;
meta_workspace_index_changed (w);
}
meta_screen_queue_workarea_recalc (screen);
g_signal_emit (screen, screen_signals[WORKSPACE_REMOVED], 0, index);
g_object_notify (G_OBJECT (screen), "n-workspaces");
}
/**
* meta_screen_append_new_workspace:
* @screen: a #MetaScreen
* @activate: %TRUE if the workspace should be switched to after creation
* @timestamp: if switching to a new workspace, timestamp to be used when
* focusing a window on the new workspace. (Doesn't hurt to pass a valid
* timestamp when available even if not switching workspaces.)
*
* Append a new workspace to the screen and (optionally) switch to that
* screen.
*
* Return value: (transfer none): the newly appended workspace.
*/
MetaWorkspace *
meta_screen_append_new_workspace (MetaScreen *screen, gboolean activate,
guint32 timestamp)
{
MetaWorkspace *w;
int new_num;
/* This also adds the workspace to the screen list */
w = meta_workspace_new (screen);
if (!w)
return NULL;
if (activate)
meta_workspace_activate (w, timestamp);
new_num = g_list_length (screen->workspaces);
set_number_of_spaces_hint (screen, new_num);
if (!meta_prefs_get_dynamic_workspaces ())
meta_prefs_set_num_workspaces (new_num);
meta_screen_queue_workarea_recalc (screen);
g_signal_emit (screen, screen_signals[WORKSPACE_ADDED],
0, meta_workspace_index (w));
g_object_notify (G_OBJECT (screen), "n-workspaces");
return w;
}
static void
update_num_workspaces (MetaScreen *screen,
guint32 timestamp)
{
int new_num, old_num;
GList *l;
int i;
GList *extras;
MetaWorkspace *last_remaining;
gboolean need_change_space;
if (meta_prefs_get_dynamic_workspaces ())
{
int n_items;
uint32_t *list;
n_items = 0;
list = NULL;
if (meta_prop_get_cardinal_list (screen->display, screen->xroot,
screen->display->atom__NET_NUMBER_OF_DESKTOPS,
&list, &n_items))
{
new_num = list[0];
meta_XFree (list);
}
else
{
new_num = 1;
}
}
else
{
new_num = meta_prefs_get_num_workspaces ();
}
g_assert (new_num > 0);
if (g_list_length (screen->workspaces) == (guint) new_num)
{
if (screen->display->display_opening)
set_number_of_spaces_hint (screen, new_num);
return;
}
last_remaining = NULL;
extras = NULL;
i = 0;
for (l = screen->workspaces; l != NULL; l = l->next)
{
MetaWorkspace *w = l->data;
if (i >= new_num)
extras = g_list_prepend (extras, w);
else
last_remaining = w;
++i;
}
old_num = i;
g_assert (last_remaining);
/* Get rid of the extra workspaces by moving all their windows
* to last_remaining, then activating last_remaining if
* one of the removed workspaces was active. This will be a bit
* wacky if the config tool for changing number of workspaces
* is on a removed workspace ;-)
*/
need_change_space = FALSE;
for (l = extras; l != NULL; l = l->next)
{
MetaWorkspace *w = l->data;
meta_workspace_relocate_windows (w, last_remaining);
if (w == screen->active_workspace)
need_change_space = TRUE;
}
if (need_change_space)
meta_workspace_activate (last_remaining, timestamp);
/* Should now be safe to free the workspaces */
for (l = extras; l != NULL; l = l->next)
{
MetaWorkspace *w = l->data;
meta_workspace_remove (w);
}
g_list_free (extras);
for (i = old_num; i < new_num; i++)
meta_workspace_new (screen);
set_number_of_spaces_hint (screen, new_num);
meta_screen_queue_workarea_recalc (screen);
for (i = old_num; i < new_num; i++)
g_signal_emit (screen, screen_signals[WORKSPACE_ADDED], 0, i);
g_object_notify (G_OBJECT (screen), "n-workspaces");
}
static int
find_highest_logical_monitor_scale (MetaBackend *backend,
MetaCursorSprite *cursor_sprite)
{
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
ClutterRect cursor_rect;
GList *logical_monitors;
GList *l;
int highest_scale = 0.0;
cursor_rect = meta_cursor_renderer_calculate_rect (cursor_renderer,
cursor_sprite);
logical_monitors =
meta_monitor_manager_get_logical_monitors (monitor_manager);
for (l = logical_monitors; l; l = l->next)
{
MetaLogicalMonitor *logical_monitor = l->data;
ClutterRect logical_monitor_rect =
meta_rectangle_to_clutter_rect (&logical_monitor->rect);
if (!clutter_rect_intersection (&cursor_rect,
&logical_monitor_rect,
NULL))
continue;
highest_scale = MAX (highest_scale, logical_monitor->scale);
}
return highest_scale;
}
static void
root_cursor_prepare_at (MetaCursorSprite *cursor_sprite,
int x,
int y,
MetaScreen *screen)
{
MetaBackend *backend = meta_get_backend ();
if (meta_is_stage_views_scaled ())
{
int scale;
scale = find_highest_logical_monitor_scale (backend, cursor_sprite);
if (scale != 0.0)
{
meta_cursor_sprite_set_theme_scale (cursor_sprite, scale);
meta_cursor_sprite_set_texture_scale (cursor_sprite, 1.0 / scale);
}
}
else
{
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaLogicalMonitor *logical_monitor;
logical_monitor =
meta_monitor_manager_get_logical_monitor_at (monitor_manager, x, y);
/* Reload the cursor texture if the scale has changed. */
if (logical_monitor)
{
meta_cursor_sprite_set_theme_scale (cursor_sprite,
logical_monitor->scale);
meta_cursor_sprite_set_texture_scale (cursor_sprite, 1.0);
}
}
}
static void
manage_root_cursor_sprite_scale (MetaScreen *screen,
MetaCursorSprite *cursor_sprite)
{
g_signal_connect_object (cursor_sprite,
"prepare-at",
G_CALLBACK (root_cursor_prepare_at),
screen,
0);
}
void
meta_screen_update_cursor (MetaScreen *screen)
{
MetaDisplay *display = screen->display;
MetaCursor cursor = screen->current_cursor;
Cursor xcursor;
MetaCursorSprite *cursor_sprite;
MetaBackend *backend = meta_get_backend ();
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
cursor_sprite = meta_cursor_sprite_from_theme (cursor);
if (meta_is_wayland_compositor ())
manage_root_cursor_sprite_scale (screen, cursor_sprite);
meta_cursor_tracker_set_root_cursor (cursor_tracker, cursor_sprite);
g_object_unref (cursor_sprite);
/* Set a cursor for X11 applications that don't specify their own */
xcursor = meta_display_create_x_cursor (display, cursor);
XDefineCursor (display->xdisplay, screen->xroot, xcursor);
XFlush (display->xdisplay);
XFreeCursor (display->xdisplay, xcursor);
}
void
meta_screen_set_cursor (MetaScreen *screen,
MetaCursor cursor)
{
if (cursor == screen->current_cursor)
return;
screen->current_cursor = cursor;
meta_screen_update_cursor (screen);
}
static gboolean
meta_screen_update_tile_preview_timeout (gpointer data)
{
MetaScreen *screen = data;
MetaWindow *window = screen->display->grab_window;
gboolean needs_preview = FALSE;
screen->tile_preview_timeout_id = 0;
if (window)
{
switch (window->tile_mode)
{
case META_TILE_LEFT:
case META_TILE_RIGHT:
if (!META_WINDOW_TILED_SIDE_BY_SIDE (window))
needs_preview = TRUE;
break;
case META_TILE_MAXIMIZED:
if (!META_WINDOW_MAXIMIZED (window))
needs_preview = TRUE;
break;
default:
needs_preview = FALSE;
break;
}
}
if (needs_preview)
{
MetaRectangle tile_rect;
int monitor;
monitor = meta_window_get_current_tile_monitor_number (window);
meta_window_get_current_tile_area (window, &tile_rect);
meta_compositor_show_tile_preview (screen->display->compositor,
window, &tile_rect, monitor);
}
else
meta_compositor_hide_tile_preview (screen->display->compositor);
return FALSE;
}
#define TILE_PREVIEW_TIMEOUT_MS 200
void
meta_screen_update_tile_preview (MetaScreen *screen,
gboolean delay)
{
if (delay)
{
if (screen->tile_preview_timeout_id > 0)
return;
screen->tile_preview_timeout_id =
g_timeout_add (TILE_PREVIEW_TIMEOUT_MS,
meta_screen_update_tile_preview_timeout,
screen);
g_source_set_name_by_id (screen->tile_preview_timeout_id,
"[mutter] meta_screen_update_tile_preview_timeout");
}
else
{
if (screen->tile_preview_timeout_id > 0)
g_source_remove (screen->tile_preview_timeout_id);
meta_screen_update_tile_preview_timeout ((gpointer)screen);
}
}
void
meta_screen_hide_tile_preview (MetaScreen *screen)
{
if (screen->tile_preview_timeout_id > 0)
g_source_remove (screen->tile_preview_timeout_id);
screen->tile_preview_timeout_id = 0;
meta_compositor_hide_tile_preview (screen->display->compositor);
}
MetaWindow*
meta_screen_get_mouse_window (MetaScreen *screen,
MetaWindow *not_this_one)
{
MetaBackend *backend = meta_get_backend ();
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
MetaWindow *window;
int x, y;
if (not_this_one)
meta_topic (META_DEBUG_FOCUS,
"Focusing mouse window excluding %s\n", not_this_one->desc);
meta_cursor_tracker_get_pointer (cursor_tracker, &x, &y, NULL);
window = meta_stack_get_default_focus_window_at_point (screen->stack,
screen->active_workspace,
not_this_one,
x, y);
return window;
}
int
meta_screen_get_monitor_index_for_rect (MetaScreen *screen,
MetaRectangle *rect)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaLogicalMonitor *logical_monitor;
logical_monitor =
meta_monitor_manager_get_logical_monitor_from_rect (monitor_manager, rect);
if (!logical_monitor)
return -1;
return logical_monitor->number;
}
int
meta_screen_get_monitor_neighbor_index (MetaScreen *screen,
int which_monitor,
MetaScreenDirection direction)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaLogicalMonitor *logical_monitor;
MetaLogicalMonitor *neighbor;
logical_monitor =
meta_monitor_manager_get_logical_monitor_from_number (monitor_manager,
which_monitor);
neighbor = meta_monitor_manager_get_logical_monitor_neighbor (monitor_manager,
logical_monitor,
direction);
return neighbor ? neighbor->number : -1;
}
/**
* meta_screen_get_current_monitor:
* @screen: a #MetaScreen
*
* Gets the index of the monitor that currently has the mouse pointer.
*
* Return value: a monitor index
*/
int
meta_screen_get_current_monitor (MetaScreen *screen)
{
MetaBackend *backend = meta_get_backend ();
MetaLogicalMonitor *logical_monitor;
logical_monitor = meta_backend_get_current_logical_monitor (backend);
/* Pretend its the first when there is no actual current monitor. */
if (!logical_monitor)
return 0;
return logical_monitor->number;
}
/**
* meta_screen_get_n_monitors:
* @screen: a #MetaScreen
*
* Gets the number of monitors that are joined together to form @screen.
*
* Return value: the number of monitors
*/
int
meta_screen_get_n_monitors (MetaScreen *screen)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
g_return_val_if_fail (META_IS_SCREEN (screen), 0);
return meta_monitor_manager_get_num_logical_monitors (monitor_manager);
}
/**
* meta_screen_get_primary_monitor:
* @screen: a #MetaScreen
*
* Gets the index of the primary monitor on this @screen.
*
* Return value: a monitor index
*/
int
meta_screen_get_primary_monitor (MetaScreen *screen)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaLogicalMonitor *logical_monitor;
g_return_val_if_fail (META_IS_SCREEN (screen), 0);
logical_monitor =
meta_monitor_manager_get_primary_logical_monitor (monitor_manager);
if (logical_monitor)
return logical_monitor->number;
else
return -1;
}
/**
* meta_screen_get_monitor_geometry:
* @screen: a #MetaScreen
* @monitor: the monitor number
* @geometry: (out): location to store the monitor geometry
*
* Stores the location and size of the indicated monitor in @geometry.
*/
void
meta_screen_get_monitor_geometry (MetaScreen *screen,
int monitor,
MetaRectangle *geometry)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaLogicalMonitor *logical_monitor;
#ifndef G_DISABLE_CHECKS
int n_logical_monitors =
meta_monitor_manager_get_num_logical_monitors (monitor_manager);
#endif
g_return_if_fail (META_IS_SCREEN (screen));
g_return_if_fail (monitor >= 0 && monitor < n_logical_monitors);
g_return_if_fail (geometry != NULL);
logical_monitor =
meta_monitor_manager_get_logical_monitor_from_number (monitor_manager,
monitor);
*geometry = logical_monitor->rect;
}
#define _NET_WM_ORIENTATION_HORZ 0
#define _NET_WM_ORIENTATION_VERT 1
#define _NET_WM_TOPLEFT 0
#define _NET_WM_TOPRIGHT 1
#define _NET_WM_BOTTOMRIGHT 2
#define _NET_WM_BOTTOMLEFT 3
void
meta_screen_update_workspace_layout (MetaScreen *screen)
{
uint32_t *list;
int n_items;
if (screen->workspace_layout_overridden)
return;
list = NULL;
n_items = 0;
if (meta_prop_get_cardinal_list (screen->display,
screen->xroot,
screen->display->atom__NET_DESKTOP_LAYOUT,
&list, &n_items))
{
if (n_items == 3 || n_items == 4)
{
int cols, rows;
switch (list[0])
{
case _NET_WM_ORIENTATION_HORZ:
screen->vertical_workspaces = FALSE;
break;
case _NET_WM_ORIENTATION_VERT:
screen->vertical_workspaces = TRUE;
break;
default:
meta_warning ("Someone set a weird orientation in _NET_DESKTOP_LAYOUT\n");
break;
}
cols = list[1];
rows = list[2];
if (rows <= 0 && cols <= 0)
{
meta_warning ("Columns = %d rows = %d in _NET_DESKTOP_LAYOUT makes no sense\n", rows, cols);
}
else
{
if (rows > 0)
screen->rows_of_workspaces = rows;
else
screen->rows_of_workspaces = -1;
if (cols > 0)
screen->columns_of_workspaces = cols;
else
screen->columns_of_workspaces = -1;
}
if (n_items == 4)
{
switch (list[3])
{
case _NET_WM_TOPLEFT:
screen->starting_corner = META_SCREEN_TOPLEFT;
break;
case _NET_WM_TOPRIGHT:
screen->starting_corner = META_SCREEN_TOPRIGHT;
break;
case _NET_WM_BOTTOMRIGHT:
screen->starting_corner = META_SCREEN_BOTTOMRIGHT;
break;
case _NET_WM_BOTTOMLEFT:
screen->starting_corner = META_SCREEN_BOTTOMLEFT;
break;
default:
meta_warning ("Someone set a weird starting corner in _NET_DESKTOP_LAYOUT\n");
break;
}
}
else
screen->starting_corner = META_SCREEN_TOPLEFT;
}
else
{
meta_warning ("Someone set _NET_DESKTOP_LAYOUT to %d integers instead of 4 "
"(3 is accepted for backwards compat)\n", n_items);
}
meta_XFree (list);
}
meta_verbose ("Workspace layout rows = %d cols = %d orientation = %d starting corner = %u\n",
screen->rows_of_workspaces,
screen->columns_of_workspaces,
screen->vertical_workspaces,
screen->starting_corner);
}
/**
* meta_screen_override_workspace_layout:
* @screen: a #MetaScreen
* @starting_corner: the corner at which the first workspace is found
* @vertical_layout: if %TRUE the workspaces are laid out in columns rather than rows
* @n_rows: number of rows of workspaces, or -1 to determine the number of rows from
* @n_columns and the total number of workspaces
* @n_columns: number of columns of workspaces, or -1 to determine the number of columns from
* @n_rows and the total number of workspaces
*
* Explicitly set the layout of workspaces. Once this has been called, the contents of the
* _NET_DESKTOP_LAYOUT property on the root window are completely ignored.
*/
void
meta_screen_override_workspace_layout (MetaScreen *screen,
MetaScreenCorner starting_corner,
gboolean vertical_layout,
int n_rows,
int n_columns)
{
g_return_if_fail (META_IS_SCREEN (screen));
g_return_if_fail (n_rows > 0 || n_columns > 0);
g_return_if_fail (n_rows != 0 && n_columns != 0);
screen->workspace_layout_overridden = TRUE;
screen->vertical_workspaces = vertical_layout != FALSE;
screen->starting_corner = starting_corner;
screen->rows_of_workspaces = n_rows;
screen->columns_of_workspaces = n_columns;
/* In theory we should remove _NET_DESKTOP_LAYOUT from _NET_SUPPORTED at this
* point, but it's unlikely that anybody checks that, and it's unlikely that
* anybody who checks that handles changes, so we'd probably just create
* a race condition. And it's hard to implement with the code in set_supported_hint()
*/
}
static void
set_workspace_names (MetaScreen *screen)
{
/* This updates names on root window when the pref changes,
* note we only get prefs change notify if things have
* really changed.
*/
GString *flattened;
int i;
int n_spaces;
/* flatten to nul-separated list */
n_spaces = meta_screen_get_n_workspaces (screen);
flattened = g_string_new ("");
i = 0;
while (i < n_spaces)
{
const char *name;
name = meta_prefs_get_workspace_name (i);
if (name)
g_string_append_len (flattened, name,
strlen (name) + 1);
else
g_string_append_len (flattened, "", 1);
++i;
}
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay,
screen->xroot,
screen->display->atom__NET_DESKTOP_NAMES,
screen->display->atom_UTF8_STRING,
8, PropModeReplace,
(unsigned char *)flattened->str, flattened->len);
meta_error_trap_pop (screen->display);
g_string_free (flattened, TRUE);
}
void
meta_screen_update_workspace_names (MetaScreen *screen)
{
char **names;
int n_names;
int i;
/* this updates names in prefs when the root window property changes,
* iff the new property contents don't match what's already in prefs
*/
names = NULL;
n_names = 0;
if (!meta_prop_get_utf8_list (screen->display,
screen->xroot,
screen->display->atom__NET_DESKTOP_NAMES,
&names, &n_names))
{
meta_verbose ("Failed to get workspace names from root window\n");
return;
}
i = 0;
while (i < n_names)
{
meta_topic (META_DEBUG_PREFS,
"Setting workspace %d name to \"%s\" due to _NET_DESKTOP_NAMES change\n",
i, names[i] ? names[i] : "null");
meta_prefs_change_workspace_name (i, names[i]);
++i;
}
g_strfreev (names);
}
Window
meta_create_offscreen_window (Display *xdisplay,
Window parent,
long valuemask)
{
XSetWindowAttributes attrs;
/* we want to be override redirect because sometimes we
* create a window on a screen we aren't managing.
* (but on a display we are managing at least one screen for)
*/
attrs.override_redirect = True;
attrs.event_mask = valuemask;
return XCreateWindow (xdisplay,
parent,
-100, -100, 1, 1,
0,
CopyFromParent,
CopyFromParent,
(Visual *)CopyFromParent,
CWOverrideRedirect | CWEventMask,
&attrs);
}
static void
set_work_area_hint (MetaScreen *screen)
{
int num_workspaces;
GList *l;
unsigned long *data, *tmp;
MetaRectangle area;
num_workspaces = meta_screen_get_n_workspaces (screen);
data = g_new (unsigned long, num_workspaces * 4);
tmp = data;
for (l = screen->workspaces; l != NULL; l = l->next)
{
MetaWorkspace *workspace = l->data;
meta_workspace_get_work_area_all_monitors (workspace, &area);
tmp[0] = area.x;
tmp[1] = area.y;
tmp[2] = area.width;
tmp[3] = area.height;
tmp += 4;
}
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_WORKAREA,
XA_CARDINAL, 32, PropModeReplace,
(guchar*) data, num_workspaces*4);
g_free (data);
meta_error_trap_pop (screen->display);
g_signal_emit (screen, screen_signals[WORKAREAS_CHANGED], 0);
}
static gboolean
set_work_area_later_func (MetaScreen *screen)
{
meta_topic (META_DEBUG_WORKAREA,
"Running work area hint computation function\n");
screen->work_area_later = 0;
set_work_area_hint (screen);
return FALSE;
}
void
meta_screen_queue_workarea_recalc (MetaScreen *screen)
{
/* Recompute work area later before redrawing */
if (screen->work_area_later == 0)
{
meta_topic (META_DEBUG_WORKAREA,
"Adding work area hint computation function\n");
screen->work_area_later =
meta_later_add (META_LATER_BEFORE_REDRAW,
(GSourceFunc) set_work_area_later_func,
screen,
NULL);
}
}
#ifdef WITH_VERBOSE_MODE
static const char *
meta_screen_corner_to_string (MetaScreenCorner corner)
{
switch (corner)
{
case META_SCREEN_TOPLEFT:
return "TopLeft";
case META_SCREEN_TOPRIGHT:
return "TopRight";
case META_SCREEN_BOTTOMLEFT:
return "BottomLeft";
case META_SCREEN_BOTTOMRIGHT:
return "BottomRight";
}
return "Unknown";
}
#endif /* WITH_VERBOSE_MODE */
void
meta_screen_calc_workspace_layout (MetaScreen *screen,
int num_workspaces,
int current_space,
MetaWorkspaceLayout *layout)
{
int rows, cols;
int grid_area;
int *grid;
int i, r, c;
int current_row, current_col;
rows = screen->rows_of_workspaces;
cols = screen->columns_of_workspaces;
if (rows <= 0 && cols <= 0)
cols = num_workspaces;
if (rows <= 0)
rows = num_workspaces / cols + ((num_workspaces % cols) > 0 ? 1 : 0);
if (cols <= 0)
cols = num_workspaces / rows + ((num_workspaces % rows) > 0 ? 1 : 0);
/* paranoia */
if (rows < 1)
rows = 1;
if (cols < 1)
cols = 1;
g_assert (rows != 0 && cols != 0);
grid_area = rows * cols;
meta_verbose ("Getting layout rows = %d cols = %d current = %d "
"num_spaces = %d vertical = %s corner = %s\n",
rows, cols, current_space, num_workspaces,
screen->vertical_workspaces ? "(true)" : "(false)",
meta_screen_corner_to_string (screen->starting_corner));
/* ok, we want to setup the distances in the workspace array to go
* in each direction. Remember, there are many ways that a workspace
* array can be setup.
* see http://www.freedesktop.org/standards/wm-spec/1.2/html/x109.html
* and look at the _NET_DESKTOP_LAYOUT section for details.
* For instance:
*/
/* starting_corner = META_SCREEN_TOPLEFT
* vertical_workspaces = 0 vertical_workspaces=1
* 1234 1357
* 5678 2468
*
* starting_corner = META_SCREEN_TOPRIGHT
* vertical_workspaces = 0 vertical_workspaces=1
* 4321 7531
* 8765 8642
*
* starting_corner = META_SCREEN_BOTTOMLEFT
* vertical_workspaces = 0 vertical_workspaces=1
* 5678 2468
* 1234 1357
*
* starting_corner = META_SCREEN_BOTTOMRIGHT
* vertical_workspaces = 0 vertical_workspaces=1
* 8765 8642
* 4321 7531
*
*/
/* keep in mind that we could have a ragged layout, e.g. the "8"
* in the above grids could be missing
*/
grid = g_new (int, grid_area);
current_row = -1;
current_col = -1;
i = 0;
switch (screen->starting_corner)
{
case META_SCREEN_TOPLEFT:
if (screen->vertical_workspaces)
{
c = 0;
while (c < cols)
{
r = 0;
while (r < rows)
{
grid[r*cols+c] = i;
++i;
++r;
}
++c;
}
}
else
{
r = 0;
while (r < rows)
{
c = 0;
while (c < cols)
{
grid[r*cols+c] = i;
++i;
++c;
}
++r;
}
}
break;
case META_SCREEN_TOPRIGHT:
if (screen->vertical_workspaces)
{
c = cols - 1;
while (c >= 0)
{
r = 0;
while (r < rows)
{
grid[r*cols+c] = i;
++i;
++r;
}
--c;
}
}
else
{
r = 0;
while (r < rows)
{
c = cols - 1;
while (c >= 0)
{
grid[r*cols+c] = i;
++i;
--c;
}
++r;
}
}
break;
case META_SCREEN_BOTTOMLEFT:
if (screen->vertical_workspaces)
{
c = 0;
while (c < cols)
{
r = rows - 1;
while (r >= 0)
{
grid[r*cols+c] = i;
++i;
--r;
}
++c;
}
}
else
{
r = rows - 1;
while (r >= 0)
{
c = 0;
while (c < cols)
{
grid[r*cols+c] = i;
++i;
++c;
}
--r;
}
}
break;
case META_SCREEN_BOTTOMRIGHT:
if (screen->vertical_workspaces)
{
c = cols - 1;
while (c >= 0)
{
r = rows - 1;
while (r >= 0)
{
grid[r*cols+c] = i;
++i;
--r;
}
--c;
}
}
else
{
r = rows - 1;
while (r >= 0)
{
c = cols - 1;
while (c >= 0)
{
grid[r*cols+c] = i;
++i;
--c;
}
--r;
}
}
break;
}
if (i != grid_area)
meta_bug ("did not fill in the whole workspace grid in %s (%d filled)\n",
G_STRFUNC, i);
current_row = 0;
current_col = 0;
r = 0;
while (r < rows)
{
c = 0;
while (c < cols)
{
if (grid[r*cols+c] == current_space)
{
current_row = r;
current_col = c;
}
else if (grid[r*cols+c] >= num_workspaces)
{
/* flag nonexistent spaces with -1 */
grid[r*cols+c] = -1;
}
++c;
}
++r;
}
layout->rows = rows;
layout->cols = cols;
layout->grid = grid;
layout->grid_area = grid_area;
layout->current_row = current_row;
layout->current_col = current_col;
#ifdef WITH_VERBOSE_MODE
if (meta_is_verbose ())
{
r = 0;
while (r < layout->rows)
{
meta_verbose (" ");
meta_push_no_msg_prefix ();
c = 0;
while (c < layout->cols)
{
if (r == layout->current_row &&
c == layout->current_col)
meta_verbose ("*%2d ", layout->grid[r*layout->cols+c]);
else
meta_verbose ("%3d ", layout->grid[r*layout->cols+c]);
++c;
}
meta_verbose ("\n");
meta_pop_no_msg_prefix ();
++r;
}
}
#endif /* WITH_VERBOSE_MODE */
}
void
meta_screen_free_workspace_layout (MetaWorkspaceLayout *layout)
{
g_free (layout->grid);
}
static void
meta_screen_resize_func (MetaWindow *window,
gpointer user_data)
{
if (window->struts)
{
meta_window_update_struts (window);
}
meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
meta_window_recalc_features (window);
}
static void
on_monitors_changed (MetaMonitorManager *manager,
MetaScreen *screen)
{
MetaBackend *backend;
MetaCursorRenderer *cursor_renderer;
meta_monitor_manager_get_screen_size (manager,
&screen->rect.width,
&screen->rect.height);
reload_logical_monitors (screen);
set_desktop_geometry_hint (screen);
/* Resize the guard window to fill the screen again. */
if (screen->guard_window != None)
{
XWindowChanges changes;
changes.x = 0;
changes.y = 0;
changes.width = screen->rect.width;
changes.height = screen->rect.height;
XConfigureWindow(screen->display->xdisplay,
screen->guard_window,
CWX | CWY | CWWidth | CWHeight,
&changes);
}
/* Fix up monitor for all windows on this screen */
meta_screen_foreach_window (screen, META_LIST_INCLUDE_OVERRIDE_REDIRECT, (MetaScreenWindowFunc) meta_window_update_for_monitors_changed, 0);
/* Queue a resize on all the windows */
meta_screen_foreach_window (screen, META_LIST_DEFAULT, meta_screen_resize_func, 0);
meta_screen_queue_check_fullscreen (screen);
backend = meta_get_backend ();
cursor_renderer = meta_backend_get_cursor_renderer (backend);
meta_cursor_renderer_force_update (cursor_renderer);
g_signal_emit (screen, screen_signals[MONITORS_CHANGED], 0);
}
void
meta_screen_update_showing_desktop_hint (MetaScreen *screen)
{
unsigned long data[1];
data[0] = screen->active_workspace->showing_desktop ? 1 : 0;
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_SHOWING_DESKTOP,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
meta_error_trap_pop (screen->display);
}
static void
queue_windows_showing (MetaScreen *screen)
{
GSList *windows, *l;
/* Must operate on all windows on display instead of just on the
* active_workspace's window list, because the active_workspace's
* window list may not contain the on_all_workspace windows.
*/
windows = meta_display_list_windows (screen->display, META_LIST_DEFAULT);
for (l = windows; l != NULL; l = l->next)
{
MetaWindow *w = l->data;
meta_window_queue (w, META_QUEUE_CALC_SHOWING);
}
g_slist_free (windows);
}
void
meta_screen_minimize_all_on_active_workspace_except (MetaScreen *screen,
MetaWindow *keep)
{
GList *l;
for (l = screen->active_workspace->windows; l != NULL; l = l->next)
{
MetaWindow *w = l->data;
if (w->has_minimize_func && w != keep)
meta_window_minimize (w);
}
}
void
meta_screen_show_desktop (MetaScreen *screen,
guint32 timestamp)
{
GList *l;
if (screen->active_workspace->showing_desktop)
return;
screen->active_workspace->showing_desktop = TRUE;
queue_windows_showing (screen);
/* Focus the most recently used META_WINDOW_DESKTOP window, if there is one;
* see bug 159257.
*/
for (l = screen->active_workspace->mru_list; l != NULL; l = l->next)
{
MetaWindow *w = l->data;
if (w->type == META_WINDOW_DESKTOP)
{
meta_window_focus (w, timestamp);
break;
}
}
meta_screen_update_showing_desktop_hint (screen);
}
void
meta_screen_unshow_desktop (MetaScreen *screen)
{
if (!screen->active_workspace->showing_desktop)
return;
screen->active_workspace->showing_desktop = FALSE;
queue_windows_showing (screen);
meta_screen_update_showing_desktop_hint (screen);
}
/**
* meta_screen_get_startup_sequences: (skip)
* @screen:
*
* Return value: (transfer none): Currently active #SnStartupSequence items
*/
GSList *
meta_screen_get_startup_sequences (MetaScreen *screen)
{
return screen->startup_sequences;
}
/* Sets the initial_timestamp and initial_workspace properties
* of a window according to information given us by the
* startup-notification library.
*
* Returns TRUE if startup properties have been applied, and
* FALSE if they have not (for example, if they had already
* been applied.)
*/
gboolean
meta_screen_apply_startup_properties (MetaScreen *screen,
MetaWindow *window)
{
#ifdef HAVE_STARTUP_NOTIFICATION
const char *startup_id;
GSList *l;
SnStartupSequence *sequence;
/* Does the window have a startup ID stored? */
startup_id = meta_window_get_startup_id (window);
meta_topic (META_DEBUG_STARTUP,
"Applying startup props to %s id \"%s\"\n",
window->desc,
startup_id ? startup_id : "(none)");
sequence = NULL;
if (startup_id == NULL)
{
/* No startup ID stored for the window. Let's ask the
* startup-notification library whether there's anything
* stored for the resource name or resource class hints.
*/
for (l = screen->startup_sequences; l != NULL; l = l->next)
{
const char *wmclass;
SnStartupSequence *seq = l->data;
wmclass = sn_startup_sequence_get_wmclass (seq);
if (wmclass != NULL &&
((window->res_class &&
strcmp (wmclass, window->res_class) == 0) ||
(window->res_name &&
strcmp (wmclass, window->res_name) == 0)))
{
sequence = seq;
g_assert (window->startup_id == NULL);
window->startup_id = g_strdup (sn_startup_sequence_get_id (sequence));
startup_id = window->startup_id;
meta_topic (META_DEBUG_STARTUP,
"Ending legacy sequence %s due to window %s\n",
sn_startup_sequence_get_id (sequence),
window->desc);
sn_startup_sequence_complete (sequence);
break;
}
}
}
/* Still no startup ID? Bail. */
if (startup_id == NULL)
return FALSE;
/* We might get this far and not know the sequence ID (if the window
* already had a startup ID stored), so let's look for one if we don't
* already know it.
*/
if (sequence == NULL)
{
for (l = screen->startup_sequences; l != NULL; l = l->next)
{
SnStartupSequence *seq = l->data;
const char *id;
id = sn_startup_sequence_get_id (seq);
if (strcmp (id, startup_id) == 0)
{
sequence = seq;
break;
}
}
}
if (sequence != NULL)
{
gboolean changed_something = FALSE;
meta_topic (META_DEBUG_STARTUP,
"Found startup sequence for window %s ID \"%s\"\n",
window->desc, startup_id);
if (!window->initial_workspace_set)
{
int space = sn_startup_sequence_get_workspace (sequence);
if (space >= 0)
{
meta_topic (META_DEBUG_STARTUP,
"Setting initial window workspace to %d based on startup info\n",
space);
window->initial_workspace_set = TRUE;
window->initial_workspace = space;
changed_something = TRUE;
}
}
if (!window->initial_timestamp_set)
{
guint32 timestamp = sn_startup_sequence_get_timestamp (sequence);
meta_topic (META_DEBUG_STARTUP,
"Setting initial window timestamp to %u based on startup info\n",
timestamp);
window->initial_timestamp_set = TRUE;
window->initial_timestamp = timestamp;
changed_something = TRUE;
}
return changed_something;
}
else
{
meta_topic (META_DEBUG_STARTUP,
"Did not find startup sequence for window %s ID \"%s\"\n",
window->desc, startup_id);
}
#endif /* HAVE_STARTUP_NOTIFICATION */
return FALSE;
}
int
meta_screen_get_screen_number (MetaScreen *screen)
{
return meta_ui_get_screen_number ();
}
/**
* meta_screen_get_display:
* @screen: A #MetaScreen
*
* Retrieve the display associated with screen.
*
* Returns: (transfer none): Display
*/
MetaDisplay *
meta_screen_get_display (MetaScreen *screen)
{
return screen->display;
}
/**
* meta_screen_get_xroot: (skip)
* @screen: A #MetaScreen
*
*/
Window
meta_screen_get_xroot (MetaScreen *screen)
{
return screen->xroot;
}
/**
* meta_screen_get_size:
* @screen: A #MetaScreen
* @width: (out): The width of the screen
* @height: (out): The height of the screen
*
* Retrieve the size of the screen.
*/
void
meta_screen_get_size (MetaScreen *screen,
int *width,
int *height)
{
if (width != NULL)
*width = screen->rect.width;
if (height != NULL)
*height = screen->rect.height;
}
void
meta_screen_set_cm_selection (MetaScreen *screen)
{
char selection[32];
Atom a;
guint32 timestamp;
timestamp = meta_display_get_current_time_roundtrip (screen->display);
g_snprintf (selection, sizeof (selection), "_NET_WM_CM_S%d",
meta_ui_get_screen_number ());
a = XInternAtom (screen->display->xdisplay, selection, False);
screen->wm_cm_selection_window = take_manager_selection (screen->display, screen->xroot, a, timestamp, TRUE);
}
/**
* meta_screen_get_workspaces: (skip)
* @screen: a #MetaScreen
*
* Returns: (transfer none) (element-type Meta.Workspace): The workspaces for @screen
*/
GList *
meta_screen_get_workspaces (MetaScreen *screen)
{
return screen->workspaces;
}
int
meta_screen_get_active_workspace_index (MetaScreen *screen)
{
MetaWorkspace *active = screen->active_workspace;
if (!active)
return -1;
return meta_workspace_index (active);
}
/**
* meta_screen_get_active_workspace:
* @screen: A #MetaScreen
*
* Returns: (transfer none): The current workspace
*/
MetaWorkspace *
meta_screen_get_active_workspace (MetaScreen *screen)
{
return screen->active_workspace;
}
void
meta_screen_focus_default_window (MetaScreen *screen,
guint32 timestamp)
{
meta_workspace_focus_default_window (screen->active_workspace,
NULL,
timestamp);
}
void
meta_screen_restacked (MetaScreen *screen)
{
g_signal_emit (screen, screen_signals[RESTACKED], 0);
}
void
meta_screen_workspace_switched (MetaScreen *screen,
int from,
int to,
MetaMotionDirection direction)
{
g_signal_emit (screen, screen_signals[WORKSPACE_SWITCHED], 0,
from, to, direction);
}
void
meta_screen_set_active_workspace_hint (MetaScreen *screen)
{
unsigned long data[1];
/* this is because we destroy the spaces in order,
* so we always end up setting a current desktop of
* 0 when closing a screen, so lose the current desktop
* on restart. By doing this we keep the current
* desktop on restart.
*/
if (screen->closing > 0)
return;
data[0] = meta_workspace_index (screen->active_workspace);
meta_verbose ("Setting _NET_CURRENT_DESKTOP to %lu\n", data[0]);
meta_error_trap_push (screen->display);
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom__NET_CURRENT_DESKTOP,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
meta_error_trap_pop (screen->display);
}
static gboolean
check_fullscreen_func (gpointer data)
{
MetaScreen *screen = data;
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
GList *logical_monitors, *l;
MetaWindow *window;
GSList *fullscreen_monitors = NULL;
GSList *obscured_monitors = NULL;
gboolean in_fullscreen_changed = FALSE;
screen->check_fullscreen_later = 0;
logical_monitors =
meta_monitor_manager_get_logical_monitors (monitor_manager);
/* We consider a monitor in fullscreen if it contains a fullscreen window;
* however we make an exception for maximized windows above the fullscreen
* one, as in that case window+chrome fully obscure the fullscreen window.
*/
for (window = meta_stack_get_top (screen->stack);
window;
window = meta_stack_get_below (screen->stack, window, FALSE))
{
gboolean covers_monitors = FALSE;
if (window->screen != screen || window->hidden)
continue;
if (window->fullscreen)
{
covers_monitors = TRUE;
}
else if (window->override_redirect)
{
/* We want to handle the case where an application is creating an
* override-redirect window the size of the screen (monitor) and treat
* it similarly to a fullscreen window, though it doesn't have fullscreen
* window management behavior. (Being O-R, it's not managed at all.)
*/
if (meta_window_is_monitor_sized (window))
covers_monitors = TRUE;
}
else if (window->maximized_horizontally &&
window->maximized_vertically)
{
MetaLogicalMonitor *logical_monitor;
logical_monitor = meta_window_get_main_logical_monitor (window);
if (!g_slist_find (obscured_monitors, logical_monitor))
obscured_monitors = g_slist_prepend (obscured_monitors,
logical_monitor);
}
if (covers_monitors)
{
MetaRectangle window_rect;
meta_window_get_frame_rect (window, &window_rect);
for (l = logical_monitors; l; l = l->next)
{
MetaLogicalMonitor *logical_monitor = l->data;
if (meta_rectangle_overlap (&window_rect,
&logical_monitor->rect) &&
!g_slist_find (fullscreen_monitors, logical_monitor) &&
!g_slist_find (obscured_monitors, logical_monitor))
fullscreen_monitors = g_slist_prepend (fullscreen_monitors,
logical_monitor);
}
}
}
g_slist_free (obscured_monitors);
for (l = logical_monitors; l; l = l->next)
{
MetaLogicalMonitor *logical_monitor = l->data;
gboolean in_fullscreen;
in_fullscreen = g_slist_find (fullscreen_monitors,
logical_monitor) != NULL;
if (in_fullscreen != logical_monitor->in_fullscreen)
{
logical_monitor->in_fullscreen = in_fullscreen;
in_fullscreen_changed = TRUE;
}
}
g_slist_free (fullscreen_monitors);
if (in_fullscreen_changed)
{
/* DOCK window stacking depends on the monitor's fullscreen
status so we need to trigger a re-layering. */
MetaWindow *window = meta_stack_get_top (screen->stack);
if (window)
meta_stack_update_layer (screen->stack, window);
g_signal_emit (screen, screen_signals[IN_FULLSCREEN_CHANGED], 0, NULL);
}
return FALSE;
}
void
meta_screen_queue_check_fullscreen (MetaScreen *screen)
{
if (!screen->check_fullscreen_later)
screen->check_fullscreen_later = meta_later_add (META_LATER_CHECK_FULLSCREEN,
check_fullscreen_func,
screen, NULL);
}
/**
* meta_screen_get_monitor_in_fullscreen:
* @screen: a #MetaScreen
* @monitor: the monitor number
*
* Determines whether there is a fullscreen window obscuring the specified
* monitor. If there is a fullscreen window, the desktop environment will
* typically hide any controls that might obscure the fullscreen window.
*
* You can get notification when this changes by connecting to
* MetaScreen::in-fullscreen-changed.
*
* Returns: %TRUE if there is a fullscreen window covering the specified monitor.
*/
gboolean
meta_screen_get_monitor_in_fullscreen (MetaScreen *screen,
int monitor)
{
MetaBackend *backend = meta_get_backend ();
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaLogicalMonitor *logical_monitor;
#ifndef G_DISABLE_CHECKS
int n_logical_monitors =
meta_monitor_manager_get_num_logical_monitors (monitor_manager);
#endif
g_return_val_if_fail (META_IS_SCREEN (screen), FALSE);
g_return_val_if_fail (monitor >= 0 &&
monitor < n_logical_monitors, FALSE);
logical_monitor =
meta_monitor_manager_get_logical_monitor_from_number (monitor_manager,
monitor);
/* We use -1 as a flag to mean "not known yet" for notification purposes */
return logical_monitor->in_fullscreen == TRUE;
}
gboolean
meta_screen_handle_xevent (MetaScreen *screen,
XEvent *xevent)
{
MetaBackend *backend = meta_get_backend ();
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
if (meta_cursor_tracker_handle_xevent (cursor_tracker, xevent))
return TRUE;
return FALSE;
}
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