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gtk2/gdk/x11/gdkscreen-x11.c
Matthias Clasen 059292a765 fix build without xfixes
2006-04-27 05:04:49 +00:00

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/*
* gdkscreen-x11.c
*
* Copyright 2001 Sun Microsystems Inc.
*
* Erwann Chenede <erwann.chenede@sun.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "gdkscreen.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay.h"
#include "gdkdisplay-x11.h"
#include "gdkx.h"
#include "gdkalias.h"
#include <X11/Xatom.h>
#ifdef HAVE_SOLARIS_XINERAMA
#include <X11/extensions/xinerama.h>
#endif
#ifdef HAVE_XFREE_XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#ifdef HAVE_RANDR
#include <X11/extensions/Xrandr.h>
#endif
#ifdef HAVE_XFIXES
#include <X11/extensions/Xfixes.h>
#endif
static void gdk_screen_x11_dispose (GObject *object);
static void gdk_screen_x11_finalize (GObject *object);
static void init_xinerama_support (GdkScreen *screen);
static void init_randr_support (GdkScreen *screen);
enum
{
WINDOW_MANAGER_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkScreenX11, _gdk_screen_x11, GDK_TYPE_SCREEN);
static void
_gdk_screen_x11_class_init (GdkScreenX11Class *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gdk_screen_x11_dispose;
object_class->finalize = gdk_screen_x11_finalize;
signals[WINDOW_MANAGER_CHANGED] =
g_signal_new (g_intern_static_string ("window_manager_changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkScreenX11Class, window_manager_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
}
static void
_gdk_screen_x11_init (GdkScreenX11 *screen)
{
}
/**
* gdk_screen_get_display:
* @screen: a #GdkScreen
*
* Gets the display to which the @screen belongs.
*
* Returns: the display to which @screen belongs
*
* Since: 2.2
**/
GdkDisplay *
gdk_screen_get_display (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_X11 (screen)->display;
}
/**
* gdk_screen_get_width:
* @screen: a #GdkScreen
*
* Gets the width of @screen in pixels
*
* Returns: the width of @screen in pixels.
*
* Since: 2.2
**/
gint
gdk_screen_get_width (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return WidthOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_height:
* @screen: a #GdkScreen
*
* Gets the height of @screen in pixels
*
* Returns: the height of @screen in pixels.
*
* Since: 2.2
**/
gint
gdk_screen_get_height (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return HeightOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_width_mm:
* @screen: a #GdkScreen
*
* Gets the width of @screen in millimeters.
* Note that on some X servers this value will not be correct.
*
* Returns: the width of @screen in millimeters.
*
* Since: 2.2
**/
gint
gdk_screen_get_width_mm (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return WidthMMOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_height_mm:
* @screen: a #GdkScreen
*
* Returns the height of @screen in millimeters.
* Note that on some X servers this value will not be correct.
*
* Returns: the heigth of @screen in millimeters.
*
* Since: 2.2
**/
gint
gdk_screen_get_height_mm (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return HeightMMOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_number:
* @screen: a #GdkScreen
*
* Gets the index of @screen among the screens in the display
* to which it belongs. (See gdk_screen_get_display())
*
* Returns: the index
*
* Since: 2.2
**/
gint
gdk_screen_get_number (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return GDK_SCREEN_X11 (screen)->screen_num;
}
/**
* gdk_screen_get_root_window:
* @screen: a #GdkScreen
*
* Gets the root window of @screen.
*
* Returns: the root window
*
* Since: 2.2
**/
GdkWindow *
gdk_screen_get_root_window (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_X11 (screen)->root_window;
}
/**
* gdk_screen_get_default_colormap:
* @screen: a #GdkScreen
*
* Gets the default colormap for @screen.
*
* Returns: the default #GdkColormap.
*
* Since: 2.2
**/
GdkColormap *
gdk_screen_get_default_colormap (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_X11 (screen)->default_colormap;
}
/**
* gdk_screen_set_default_colormap:
* @screen: a #GdkScreen
* @colormap: a #GdkColormap
*
* Sets the default @colormap for @screen.
*
* Since: 2.2
**/
void
gdk_screen_set_default_colormap (GdkScreen *screen,
GdkColormap *colormap)
{
GdkColormap *old_colormap;
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (GDK_IS_COLORMAP (colormap));
old_colormap = GDK_SCREEN_X11 (screen)->default_colormap;
GDK_SCREEN_X11 (screen)->default_colormap = g_object_ref (colormap);
if (old_colormap)
g_object_unref (old_colormap);
}
static void
gdk_screen_x11_dispose (GObject *object)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (object);
_gdk_x11_events_uninit_screen (GDK_SCREEN (object));
if (screen_x11->default_colormap)
{
g_object_unref (screen_x11->default_colormap);
screen_x11->default_colormap = NULL;
}
if (screen_x11->system_colormap)
{
g_object_unref (screen_x11->system_colormap);
screen_x11->system_colormap = NULL;
}
if (screen_x11->rgba_colormap)
{
g_object_unref (screen_x11->rgba_colormap);
screen_x11->rgba_colormap = NULL;
}
if (screen_x11->root_window)
_gdk_window_destroy (screen_x11->root_window, TRUE);
G_OBJECT_CLASS (_gdk_screen_x11_parent_class)->dispose (object);
screen_x11->xdisplay = NULL;
screen_x11->xscreen = NULL;
screen_x11->screen_num = -1;
screen_x11->xroot_window = None;
screen_x11->wmspec_check_window = None;
}
static void
gdk_screen_x11_finalize (GObject *object)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (object);
gint i;
if (screen_x11->root_window)
g_object_unref (screen_x11->root_window);
if (screen_x11->renderer)
g_object_unref (screen_x11->renderer);
/* Visual Part */
for (i = 0; i < screen_x11->nvisuals; i++)
g_object_unref (screen_x11->visuals[i]);
g_free (screen_x11->visuals);
g_hash_table_destroy (screen_x11->visual_hash);
g_free (screen_x11->window_manager_name);
g_hash_table_destroy (screen_x11->colormap_hash);
g_free (screen_x11->monitors);
G_OBJECT_CLASS (_gdk_screen_x11_parent_class)->finalize (object);
}
/**
* gdk_screen_get_n_monitors:
* @screen: a #GdkScreen.
*
* Returns the number of monitors which @screen consists of.
*
* Returns: number of monitors which @screen consists of.
*
* Since: 2.2
**/
gint
gdk_screen_get_n_monitors (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return GDK_SCREEN_X11 (screen)->num_monitors;
}
/**
* gdk_screen_get_monitor_geometry:
* @screen : a #GdkScreen.
* @monitor_num: the monitor number.
* @dest : a #GdkRectangle to be filled with the monitor geometry
*
* Retrieves the #GdkRectangle representing the size and position of
* the individual monitor within the entire screen area.
*
* Note that the size of the entire screen area can be retrieved via
* gdk_screen_get_width() and gdk_screen_get_height().
*
* Since: 2.2
**/
void
gdk_screen_get_monitor_geometry (GdkScreen *screen,
gint monitor_num,
GdkRectangle *dest)
{
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (monitor_num < GDK_SCREEN_X11 (screen)->num_monitors);
g_return_if_fail (monitor_num >= 0);
*dest = GDK_SCREEN_X11 (screen)->monitors[monitor_num];
}
/**
* gdk_screen_get_rgba_colormap:
* @screen: a #GdkScreen.
*
* Gets a colormap to use for creating windows or pixmaps with an
* alpha channel. The windowing system on which GTK+ is running
* may not support this capability, in which case %NULL will
* be returned. Even if a non-%NULL value is returned, its
* possible that the window's alpha channel won't be honored
* when displaying the window on the screen: in particular, for
* X an appropriate windowing manager and compositing manager
* must be running to provide appropriate display.
*
* Return value: a colormap to use for windows with an alpha channel
* or %NULL if the capability is not available.
*
* Since: 2.8
**/
GdkColormap *
gdk_screen_get_rgba_colormap (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
if (!screen_x11->rgba_visual)
return NULL;
if (!screen_x11->rgba_colormap)
screen_x11->rgba_colormap = gdk_colormap_new (screen_x11->rgba_visual,
FALSE);
return screen_x11->rgba_colormap;
}
/**
* gdk_screen_get_rgba_visual:
* @screen: a #GdkScreen
*
* Gets a visual to use for creating windows or pixmaps with an
* alpha channel. See the docs for gdk_screen_get_rgba_colormap()
* for caveats.
*
* Return value: a visual to use for windows with an alpha channel
* or %NULL if the capability is not available.
*
* Since: 2.8
**/
GdkVisual *
gdk_screen_get_rgba_visual (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
return screen_x11->rgba_visual;
}
/**
* gdk_x11_screen_get_xscreen:
* @screen: a #GdkScreen.
* @returns: an Xlib <type>Screen*</type>
*
* Returns the screen of a #GdkScreen.
*
* Since: 2.2
*/
Screen *
gdk_x11_screen_get_xscreen (GdkScreen *screen)
{
return GDK_SCREEN_X11 (screen)->xscreen;
}
/**
* gdk_x11_screen_get_screen_number:
* @screen: a #GdkScreen.
* @returns: the position of @screen among the screens of
* its display.
*
* Returns the index of a #GdkScreen.
*
* Since: 2.2
*/
int
gdk_x11_screen_get_screen_number (GdkScreen *screen)
{
return GDK_SCREEN_X11 (screen)->screen_num;
}
static gboolean
check_is_composited (GdkDisplay *display,
GdkScreenX11 *screen_x11)
{
Atom xselection = gdk_x11_atom_to_xatom_for_display (display, screen_x11->cm_selection_atom);
Window xwindow;
xwindow = XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (display), xselection);
return xwindow != None;
}
static GdkAtom
make_cm_atom (int screen_number)
{
gchar *name = g_strdup_printf ("_NET_WM_CM_S%d", screen_number);
GdkAtom atom = gdk_atom_intern (name, FALSE);
g_free (name);
return atom;
}
GdkScreen *
_gdk_x11_screen_new (GdkDisplay *display,
gint screen_number)
{
GdkScreen *screen;
GdkScreenX11 *screen_x11;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
screen = g_object_new (GDK_TYPE_SCREEN_X11, NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
screen_x11->display = display;
screen_x11->xdisplay = display_x11->xdisplay;
screen_x11->xscreen = ScreenOfDisplay (display_x11->xdisplay, screen_number);
screen_x11->screen_num = screen_number;
screen_x11->xroot_window = RootWindow (display_x11->xdisplay,screen_number);
screen_x11->wmspec_check_window = None;
/* we want this to be always non-null */
screen_x11->window_manager_name = g_strdup ("unknown");
screen_x11->cm_selection_atom = make_cm_atom (screen_number);
screen_x11->is_composited = check_is_composited (display, screen_x11);
init_xinerama_support (screen);
init_randr_support (screen);
_gdk_visual_init (screen);
_gdk_windowing_window_init (screen);
return screen;
}
void
_gdk_x11_screen_request_cm_notification (GdkScreenX11 *screen_x11)
{
gdk_display_request_selection_notification (screen_x11->display, screen_x11->cm_selection_atom);
}
/**
* gdk_screen_is_composited:
* @screen: a #GdkScreen
*
* Returns whether windows with an RGBA visual can reasonably
* be expected to have their alpha channel drawn correctly on
* the screen.
*
* On X11 this function returns whether a compositing manager is
* compositing @screen.
*
* Return value: Whether windows with RGBA visuals can reasonably be
* expected to have their alpha channels drawn correctly on the screen.
*
* Since: 2.10
**/
gboolean
gdk_screen_is_composited (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
screen_x11 = GDK_SCREEN_X11 (screen);
return screen_x11->is_composited;
}
#ifdef HAVE_XINERAMA
static gboolean
check_solaris_xinerama (GdkScreen *screen)
{
#ifdef HAVE_SOLARIS_XINERAMA
if (XineramaGetState (GDK_SCREEN_XDISPLAY (screen),
gdk_screen_get_number (screen)))
{
XRectangle monitors[MAXFRAMEBUFFERS];
unsigned char hints[16];
gint result;
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
result = XineramaGetInfo (GDK_SCREEN_XDISPLAY (screen),
gdk_screen_get_number (screen),
monitors, hints,
&screen_x11->num_monitors);
/* Yes I know it should be Success but the current implementation
returns the num of monitor*/
if (result == 0)
{
/* FIXME: We need to trap errors, since XINERAMA isn't always XINERAMA.
*/
g_error ("error while retrieving Xinerama information");
}
else
{
int i;
screen_x11->monitors = g_new0 (GdkRectangle, screen_x11->num_monitors);
for (i = 0; i < screen_x11->num_monitors; i++)
{
screen_x11->monitors[i].x = monitors[i].x;
screen_x11->monitors[i].y = monitors[i].y;
screen_x11->monitors[i].width = monitors[i].width;
screen_x11->monitors[i].height = monitors[i].height;
}
return TRUE;
}
}
#endif /* HAVE_SOLARIS_XINERAMA */
return FALSE;
}
static gboolean
check_xfree_xinerama (GdkScreen *screen)
{
#ifdef HAVE_XFREE_XINERAMA
if (XineramaIsActive (GDK_SCREEN_XDISPLAY (screen)))
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XineramaScreenInfo *monitors = XineramaQueryScreens (GDK_SCREEN_XDISPLAY (screen),
&screen_x11->num_monitors);
if (screen_x11->num_monitors <= 0)
{
/* FIXME: We need to trap errors, since XINERAMA isn't always XINERAMA.
* I don't think the num_monitors <= 0 check has any validity.
*/
g_error ("error while retrieving Xinerama information");
}
else
{
int i;
screen_x11->monitors = g_new0 (GdkRectangle, screen_x11->num_monitors);
for (i = 0; i < screen_x11->num_monitors; i++)
{
screen_x11->monitors[i].x = monitors[i].x_org;
screen_x11->monitors[i].y = monitors[i].y_org;
screen_x11->monitors[i].width = monitors[i].width;
screen_x11->monitors[i].height = monitors[i].height;
}
XFree (monitors);
return TRUE;
}
}
#endif /* HAVE_XFREE_XINERAMA */
return FALSE;
}
#endif /* HAVE_XINERAMA */
static void
init_xinerama_support (GdkScreen * screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
#ifdef HAVE_XINERAMA
int opcode, firstevent, firsterror;
#endif
if (screen_x11->monitors)
g_free (screen_x11->monitors);
#ifdef HAVE_XINERAMA
if (XQueryExtension (GDK_SCREEN_XDISPLAY (screen), "XINERAMA",
&opcode, &firstevent, &firsterror))
{
if (check_solaris_xinerama (screen) ||
check_xfree_xinerama (screen))
return;
}
#endif /* HAVE_XINERAMA */
/* No Xinerama
*/
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_XINERAMA)
{
/* Fake Xinerama mode by splitting the screen into 4 monitors.
* Also draw a little cross to make the monitor boundaries visible.
*/
XSetWindowAttributes atts;
Window win;
gint w, h;
w = WidthOfScreen (screen_x11->xscreen);
h = HeightOfScreen (screen_x11->xscreen);
screen_x11->num_monitors = 4;
screen_x11->monitors = g_new0 (GdkRectangle, 4);
screen_x11->monitors[0].x = 0;
screen_x11->monitors[0].y = 0;
screen_x11->monitors[0].width = w / 2;
screen_x11->monitors[0].height = h / 2;
screen_x11->monitors[1].x = w / 2;
screen_x11->monitors[1].y = 0;
screen_x11->monitors[1].width = w / 2;
screen_x11->monitors[1].height = h / 2;
screen_x11->monitors[2].x = 0;
screen_x11->monitors[2].y = h / 2;
screen_x11->monitors[2].width = w / 2;
screen_x11->monitors[2].height = h / 2;
screen_x11->monitors[3].x = w / 2;
screen_x11->monitors[3].y = h / 2;
screen_x11->monitors[3].width = w / 2;
screen_x11->monitors[3].height = h / 2;
atts.override_redirect = 1;
atts.background_pixel = WhitePixel(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num);
win = XCreateWindow(GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window, 0, h / 2, w, 1, 0,
DefaultDepth(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
InputOutput,
DefaultVisual(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
CWOverrideRedirect|CWBackPixel,
&atts);
XMapRaised(GDK_SCREEN_XDISPLAY (screen), win);
win = XCreateWindow(GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window, w/2 , 0, 1, h, 0,
DefaultDepth(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
InputOutput,
DefaultVisual(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
CWOverrideRedirect|CWBackPixel,
&atts);
XMapRaised(GDK_SCREEN_XDISPLAY (screen), win);
}
else
#endif
{
screen_x11->num_monitors = 1;
screen_x11->monitors = g_new0 (GdkRectangle, 1);
screen_x11->monitors[0].x = 0;
screen_x11->monitors[0].y = 0;
screen_x11->monitors[0].width = WidthOfScreen (screen_x11->xscreen);
screen_x11->monitors[0].height = HeightOfScreen (screen_x11->xscreen);
}
}
static void
init_randr_support (GdkScreen * screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XSelectInput (GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window,
StructureNotifyMask);
}
void
_gdk_x11_screen_size_changed (GdkScreen *screen,
XEvent *event)
{
#ifdef HAVE_RANDR
if (!XRRUpdateConfiguration (event))
return;
#else
if (event->type == ConfigureNotify)
{
XConfigureEvent *rcevent = (XConfigureEvent *) event;
Screen *xscreen = gdk_x11_screen_get_xscreen (screen);
xscreen->width = rcevent->width;
xscreen->height = rcevent->height;
}
else
return;
#endif
init_xinerama_support (screen);
g_signal_emit_by_name (screen, "size_changed");
}
void
_gdk_x11_screen_window_manager_changed (GdkScreen *screen)
{
g_signal_emit (screen, signals[WINDOW_MANAGER_CHANGED], 0);
}
void
_gdk_x11_screen_process_owner_change (GdkScreen *screen,
XEvent *event)
{
#ifdef HAVE_XFIXES
XFixesSelectionNotifyEvent *selection_event = (XFixesSelectionNotifyEvent *)event;
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
Atom xcm_selection_atom = gdk_x11_atom_to_xatom_for_display (screen_x11->display,
screen_x11->cm_selection_atom);
if (selection_event->selection == xcm_selection_atom)
{
gboolean composited = selection_event->owner != None;
if (composited != screen_x11->is_composited)
{
screen_x11->is_composited = composited;
g_signal_emit_by_name (screen, "composited_changed");
}
}
#endif
}
/**
* _gdk_windowing_substitute_screen_number:
* @display_name : The name of a display, in the form used by
* gdk_display_open (). If %NULL a default value
* will be used. On X11, this is derived from the DISPLAY
* environment variable.
* @screen_number : The number of a screen within the display
* referred to by @display_name.
*
* Modifies a @display_name to make @screen_number the default
* screen when the display is opened.
*
* Return value: a newly allocated string holding the resulting
* display name. Free with g_free().
*/
gchar *
_gdk_windowing_substitute_screen_number (const gchar *display_name,
gint screen_number)
{
GString *str;
gchar *p;
if (!display_name)
display_name = getenv ("DISPLAY");
if (!display_name)
return NULL;
str = g_string_new (display_name);
p = strrchr (str->str, '.');
if (p && p > strchr (str->str, ':'))
g_string_truncate (str, p - str->str);
g_string_append_printf (str, ".%d", screen_number);
return g_string_free (str, FALSE);
}
/**
* gdk_screen_make_display_name:
* @screen: a #GdkScreen
*
* Determines the name to pass to gdk_display_open() to get
* a #GdkDisplay with this screen as the default screen.
*
* Return value: a newly allocated string, free with g_free()
*
* Since: 2.2
**/
gchar *
gdk_screen_make_display_name (GdkScreen *screen)
{
const gchar *old_display;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
old_display = gdk_display_get_name (gdk_screen_get_display (screen));
return _gdk_windowing_substitute_screen_number (old_display,
gdk_screen_get_number (screen));
}
/**
* gdk_screen_get_active_window
* @screen: a #GdkScreen
*
* Returns the screen's currently active window.
*
* On X11, this is done by inspecting the _NET_ACTIVE_WINDOW property
* on the root window, as described in the <ulink
* url="http://www.freedesktop.org/Standards/wm-spec">Extended Window
* Manager Hints</ulink>. If there is no currently currently active
* window, or the window manager does not support the
* _NET_ACTIVE_WINDOW hint, this function returns %NULL.
*
* On other platforms, this function may return %NULL, depending on whether
* it is implementable on that platform.
*
* The returned window should be unrefed using g_object_unref() when
* no longer needed.
*
* Return value: the currently active window, or %NULL.
*
* Since: 2.10
**/
GdkWindow *
gdk_screen_get_active_window (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
GdkWindow *ret = NULL;
Atom type_return;
gint format_return;
gulong nitems_return;
gulong bytes_after_return;
guchar *data = NULL;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_ACTIVE_WINDOW")))
return NULL;
screen_x11 = GDK_SCREEN_X11 (screen);
if (XGetWindowProperty (screen_x11->xdisplay, screen_x11->xroot_window,
gdk_x11_get_xatom_by_name_for_display (screen_x11->display,
"_NET_ACTIVE_WINDOW"),
0, 1, False, XA_WINDOW, &type_return,
&format_return, &nitems_return,
&bytes_after_return, &data)
== Success)
{
if ((type_return == XA_WINDOW) && (format_return == 32) && (data))
{
GdkNativeWindow window = *(GdkNativeWindow *) data;
if (window != None)
{
ret = gdk_window_foreign_new_for_display (screen_x11->display,
*(GdkNativeWindow *) data);
}
}
}
if (data)
XFree (data);
return ret;
}
/**
* gdk_screen_get_window_stack
* @screen: a #GdkScreen
*
* Returns a #GList of #GdkWindow<!-- -->s representing the current
* window stack.
*
* On X11, this is done by inspecting the _NET_CLIENT_LIST_STACKING
* property on the root window, as described in the <ulink
* url="http://www.freedesktop.org/Standards/wm-spec">Extended Window
* Manager Hints</ulink>. If the window manager does not support the
* _NET_CLIENT_LIST_STACKING hint, this function returns %NULL.
*
* On other platforms, this function may return %NULL, depending on whether
* it is implementable on that platform.
*
* The returned list is newly allocated and owns references to the
* windows it contains, so it should be freed using g_list_free() and
* its windows unrefed using g_object_unref() when no longer needed.
*
* Return value: a list of #GdkWindow<!-- -->s for the current window stack,
* or %NULL.
*
* Since: 2.10
**/
GList *
gdk_screen_get_window_stack (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
GList *ret = NULL;
Atom type_return;
gint format_return;
gulong nitems_return;
gulong bytes_after_return;
guchar *data = NULL;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_CLIENT_LIST_STACKING")))
return NULL;
screen_x11 = GDK_SCREEN_X11 (screen);
if (XGetWindowProperty (screen_x11->xdisplay, screen_x11->xroot_window,
gdk_x11_get_xatom_by_name_for_display (screen_x11->display,
"_NET_CLIENT_LIST_STACKING"),
0, G_MAXLONG, False, XA_WINDOW, &type_return,
&format_return, &nitems_return,
&bytes_after_return, &data)
== Success)
{
if ((type_return == XA_WINDOW) && (format_return == 32) &&
(data) && (nitems_return > 0))
{
GdkNativeWindow *stack = (GdkNativeWindow *) data;
GdkWindow *win;
int i;
for (i = 0; i < nitems_return; i++)
{
win = gdk_window_foreign_new_for_display (screen_x11->display,
stack[i]);
if (win != NULL)
ret = g_list_append (ret, win);
}
}
}
if (data)
XFree (data);
return ret;
}
#define __GDK_SCREEN_X11_C__
#include "gdkaliasdef.c"
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