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gtk2/gdk/x11/gdkscreen-x11.c
Colin Walters 65e3c09139 introspection: Fix (out) for gdk_screen_get_monitor_geometry 
Scanner doesn't detect this case correctly because it's a typedef;
work around it here by explicitly specifying that it's caller
allocates.  See bug 636393 for the scanner issue.
2010-12-06 11:42:47 -05:00

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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 "gdkscreen-x11.h"
#include "gdkscreen.h"
#include "gdkdisplay.h"
#include "gdkdisplay-x11.h"
#include "gdkx.h"
#include <glib.h>
#include <stdlib.h>
#include <string.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
#include "gdksettings.c"
static void gdk_screen_x11_dispose (GObject *object);
static void gdk_screen_x11_finalize (GObject *object);
static void init_randr_support (GdkScreen *screen);
static void deinit_multihead (GdkScreen *screen);
enum
{
WINDOW_MANAGER_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkScreenX11, _gdk_screen_x11, GDK_TYPE_SCREEN)
typedef struct _NetWmSupportedAtoms NetWmSupportedAtoms;
struct _NetWmSupportedAtoms
{
Atom *atoms;
gulong n_atoms;
};
struct _GdkX11Monitor
{
GdkRectangle geometry;
XID output;
int width_mm;
int height_mm;
char * output_name;
char * manufacturer;
};
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: (transfer none): 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: (transfer none): 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;
}
static void
_gdk_screen_x11_events_uninit (GdkScreen *screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
if (screen_x11->xsettings_client)
{
xsettings_client_destroy (screen_x11->xsettings_client);
screen_x11->xsettings_client = NULL;
}
}
static void
gdk_screen_x11_dispose (GObject *object)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (object);
int i;
for (i = 0; i < 32; ++i)
{
if (screen_x11->subwindow_gcs[i])
{
XFreeGC (screen_x11->xdisplay, screen_x11->subwindow_gcs[i]);
screen_x11->subwindow_gcs[i] = 0;
}
}
_gdk_screen_x11_events_uninit (GDK_SCREEN (object));
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);
/* 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);
deinit_multihead (GDK_SCREEN (object));
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)->n_monitors;
}
/**
* gdk_screen_get_primary_monitor:
* @screen: a #GdkScreen.
*
* Gets the primary monitor for @screen. The primary monitor
* is considered the monitor where the 'main desktop' lives.
* While normal application windows typically allow the window
* manager to place the windows, specialized desktop applications
* such as panels should place themselves on the primary monitor.
*
* If no primary monitor is configured by the user, the return value
* will be 0, defaulting to the first monitor.
*
* Returns: An integer index for the primary monitor, or 0 if none is configured.
*
* Since: 2.20
*/
gint
gdk_screen_get_primary_monitor (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return GDK_SCREEN_X11 (screen)->primary_monitor;
}
/**
* gdk_screen_get_monitor_width_mm:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor, between 0 and gdk_screen_get_n_monitors (screen)
*
* Gets the width in millimeters of the specified monitor, if available.
*
* Returns: the width of the monitor, or -1 if not available
*
* Since: 2.14
*/
gint
gdk_screen_get_monitor_width_mm (GdkScreen *screen,
gint monitor_num)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
g_return_val_if_fail (GDK_IS_SCREEN (screen), -1);
g_return_val_if_fail (monitor_num >= 0, -1);
g_return_val_if_fail (monitor_num < screen_x11->n_monitors, -1);
return screen_x11->monitors[monitor_num].width_mm;
}
/**
* gdk_screen_get_monitor_height_mm:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor, between 0 and gdk_screen_get_n_monitors (screen)
*
* Gets the height in millimeters of the specified monitor.
*
* Returns: the height of the monitor, or -1 if not available
*
* Since: 2.14
*/
gint
gdk_screen_get_monitor_height_mm (GdkScreen *screen,
gint monitor_num)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
g_return_val_if_fail (GDK_IS_SCREEN (screen), -1);
g_return_val_if_fail (monitor_num >= 0, -1);
g_return_val_if_fail (monitor_num < screen_x11->n_monitors, -1);
return screen_x11->monitors[monitor_num].height_mm;
}
/**
* gdk_screen_get_monitor_plug_name:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor, between 0 and gdk_screen_get_n_monitors (screen)
*
* Returns the output name of the specified monitor.
* Usually something like VGA, DVI, or TV, not the actual
* product name of the display device.
*
* Returns: a newly-allocated string containing the name of the monitor,
* or %NULL if the name cannot be determined
*
* Since: 2.14
*/
gchar *
gdk_screen_get_monitor_plug_name (GdkScreen *screen,
gint monitor_num)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
g_return_val_if_fail (monitor_num >= 0, NULL);
g_return_val_if_fail (monitor_num < screen_x11->n_monitors, NULL);
return g_strdup (screen_x11->monitors[monitor_num].output_name);
}
/**
* gdk_x11_screen_get_monitor_output:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor, between 0 and gdk_screen_get_n_monitors (screen)
*
* Gets the XID of the specified output/monitor.
* If the X server does not support version 1.2 of the RANDR
* extension, 0 is returned.
*
* Returns: the XID of the monitor
*
* Since: 2.14
*/
XID
gdk_x11_screen_get_monitor_output (GdkScreen *screen,
gint monitor_num)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
g_return_val_if_fail (GDK_IS_SCREEN (screen), None);
g_return_val_if_fail (monitor_num >= 0, None);
g_return_val_if_fail (monitor_num < screen_x11->n_monitors, None);
return screen_x11->monitors[monitor_num].output;
}
/**
* gdk_screen_get_monitor_geometry:
* @screen: a #GdkScreen
* @monitor_num: the monitor number, between 0 and gdk_screen_get_n_monitors (screen)
* @dest: (out caller-allocates) (allow-none): 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)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (monitor_num >= 0);
g_return_if_fail (monitor_num < screen_x11->n_monitors);
if (dest)
*dest = screen_x11->monitors[monitor_num].geometry;
}
/**
* gdk_screen_get_rgba_visual:
* @screen: a #GdkScreen
*
* Gets a visual to use for creating windows 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.
*
* This functionality is not implemented in the Windows backend.
*
* For setting an overall opacity for a top-level window, see
* gdk_window_set_opacity().
*
* Return value: (transfer none): 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: (transfer none): 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;
}
static void
init_monitor_geometry (GdkX11Monitor *monitor,
int x, int y, int width, int height)
{
monitor->geometry.x = x;
monitor->geometry.y = y;
monitor->geometry.width = width;
monitor->geometry.height = height;
monitor->output = None;
monitor->width_mm = -1;
monitor->height_mm = -1;
monitor->output_name = NULL;
monitor->manufacturer = NULL;
}
static gboolean
init_fake_xinerama (GdkScreen *screen)
{
#ifdef G_ENABLE_DEBUG
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XSetWindowAttributes atts;
Window win;
gint w, h;
if (!(_gdk_debug_flags & GDK_DEBUG_XINERAMA))
return FALSE;
/* Fake Xinerama mode by splitting the screen into 4 monitors.
* Also draw a little cross to make the monitor boundaries visible.
*/
w = WidthOfScreen (screen_x11->xscreen);
h = HeightOfScreen (screen_x11->xscreen);
screen_x11->n_monitors = 4;
screen_x11->monitors = g_new0 (GdkX11Monitor, 4);
init_monitor_geometry (&screen_x11->monitors[0], 0, 0, w / 2, h / 2);
init_monitor_geometry (&screen_x11->monitors[1], w / 2, 0, w / 2, h / 2);
init_monitor_geometry (&screen_x11->monitors[2], 0, h / 2, w / 2, h / 2);
init_monitor_geometry (&screen_x11->monitors[3], w / 2, h / 2, w / 2, 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);
return TRUE;
#endif
return FALSE;
}
static void
free_monitors (GdkX11Monitor *monitors,
gint n_monitors)
{
int i;
for (i = 0; i < n_monitors; ++i)
{
g_free (monitors[i].output_name);
g_free (monitors[i].manufacturer);
}
g_free (monitors);
}
#ifdef HAVE_RANDR
static int
monitor_compare_function (GdkX11Monitor *monitor1,
GdkX11Monitor *monitor2)
{
/* Sort the leftmost/topmost monitors first.
* For "cloned" monitors, sort the bigger ones first
* (giving preference to taller monitors over wider
* monitors)
*/
if (monitor1->geometry.x != monitor2->geometry.x)
return monitor1->geometry.x - monitor2->geometry.x;
if (monitor1->geometry.y != monitor2->geometry.y)
return monitor1->geometry.y - monitor2->geometry.y;
if (monitor1->geometry.height != monitor2->geometry.height)
return - (monitor1->geometry.height - monitor2->geometry.height);
if (monitor1->geometry.width != monitor2->geometry.width)
return - (monitor1->geometry.width - monitor2->geometry.width);
return 0;
}
#endif
static gboolean
init_randr13 (GdkScreen *screen)
{
#ifdef HAVE_RANDR
GdkDisplay *display = gdk_screen_get_display (screen);
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
Display *dpy = GDK_SCREEN_XDISPLAY (screen);
XRRScreenResources *resources;
RROutput primary_output;
RROutput first_output = None;
int i;
GArray *monitors;
gboolean randr12_compat = FALSE;
if (!display_x11->have_randr13)
return FALSE;
resources = XRRGetScreenResourcesCurrent (screen_x11->xdisplay,
screen_x11->xroot_window);
if (!resources)
return FALSE;
monitors = g_array_sized_new (FALSE, TRUE, sizeof (GdkX11Monitor),
resources->noutput);
for (i = 0; i < resources->noutput; ++i)
{
XRROutputInfo *output =
XRRGetOutputInfo (dpy, resources, resources->outputs[i]);
/* Non RandR1.2 X driver have output name "default" */
randr12_compat |= !g_strcmp0 (output->name, "default");
if (output->connection == RR_Disconnected)
{
XRRFreeOutputInfo (output);
continue;
}
if (output->crtc)
{
GdkX11Monitor monitor;
XRRCrtcInfo *crtc = XRRGetCrtcInfo (dpy, resources, output->crtc);
monitor.geometry.x = crtc->x;
monitor.geometry.y = crtc->y;
monitor.geometry.width = crtc->width;
monitor.geometry.height = crtc->height;
monitor.output = resources->outputs[i];
monitor.width_mm = output->mm_width;
monitor.height_mm = output->mm_height;
monitor.output_name = g_strdup (output->name);
/* FIXME: need EDID parser */
monitor.manufacturer = NULL;
g_array_append_val (monitors, monitor);
XRRFreeCrtcInfo (crtc);
}
XRRFreeOutputInfo (output);
}
if (resources->noutput > 0)
first_output = resources->outputs[0];
XRRFreeScreenResources (resources);
/* non RandR 1.2 X driver doesn't return any usable multihead data */
if (randr12_compat)
{
guint n_monitors = monitors->len;
free_monitors ((GdkX11Monitor *)g_array_free (monitors, FALSE),
n_monitors);
return FALSE;
}
g_array_sort (monitors,
(GCompareFunc) monitor_compare_function);
screen_x11->n_monitors = monitors->len;
screen_x11->monitors = (GdkX11Monitor *)g_array_free (monitors, FALSE);
screen_x11->primary_monitor = 0;
primary_output = XRRGetOutputPrimary (screen_x11->xdisplay,
screen_x11->xroot_window);
for (i = 0; i < screen_x11->n_monitors; ++i)
{
if (screen_x11->monitors[i].output == primary_output)
{
screen_x11->primary_monitor = i;
break;
}
/* No RandR1.3+ available or no primary set, fall back to prefer LVDS as primary if present */
if (primary_output == None &&
g_ascii_strncasecmp (screen_x11->monitors[i].output_name, "LVDS", 4) == 0)
{
screen_x11->primary_monitor = i;
break;
}
/* No primary specified and no LVDS found */
if (screen_x11->monitors[i].output == first_output)
screen_x11->primary_monitor = i;
}
return screen_x11->n_monitors > 0;
#endif
return FALSE;
}
static gboolean
init_solaris_xinerama (GdkScreen *screen)
{
#ifdef HAVE_SOLARIS_XINERAMA
Display *dpy = GDK_SCREEN_XDISPLAY (screen);
int screen_no = gdk_screen_get_number (screen);
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XRectangle monitors[MAXFRAMEBUFFERS];
unsigned char hints[16];
gint result;
int n_monitors;
int i;
if (!XineramaGetState (dpy, screen_no))
return FALSE;
result = XineramaGetInfo (dpy, screen_no, monitors, hints, &n_monitors);
/* Yes I know it should be Success but the current implementation
* returns the num of monitor
*/
if (result == 0)
{
return FALSE;
}
screen_x11->monitors = g_new0 (GdkX11Monitor, n_monitors);
screen_x11->n_monitors = n_monitors;
for (i = 0; i < n_monitors; i++)
{
init_monitor_geometry (&screen_x11->monitors[i],
monitors[i].x, monitors[i].y,
monitors[i].width, monitors[i].height);
}
screen_x11->primary_monitor = 0;
return TRUE;
#endif /* HAVE_SOLARIS_XINERAMA */
return FALSE;
}
static gboolean
init_xfree_xinerama (GdkScreen *screen)
{
#ifdef HAVE_XFREE_XINERAMA
Display *dpy = GDK_SCREEN_XDISPLAY (screen);
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XineramaScreenInfo *monitors;
int i, n_monitors;
if (!XineramaIsActive (dpy))
return FALSE;
monitors = XineramaQueryScreens (dpy, &n_monitors);
if (n_monitors <= 0 || monitors == NULL)
{
/* If Xinerama doesn't think we have any monitors, try acting as
* though we had no Xinerama. If the "no monitors" condition
* is because XRandR 1.2 is currently switching between CRTCs,
* we'll be notified again when we have our monitor back,
* and can go back into Xinerama-ish mode at that point.
*/
if (monitors)
XFree (monitors);
return FALSE;
}
screen_x11->n_monitors = n_monitors;
screen_x11->monitors = g_new0 (GdkX11Monitor, n_monitors);
for (i = 0; i < n_monitors; ++i)
{
init_monitor_geometry (&screen_x11->monitors[i],
monitors[i].x_org, monitors[i].y_org,
monitors[i].width, monitors[i].height);
}
XFree (monitors);
screen_x11->primary_monitor = 0;
return TRUE;
#endif /* HAVE_XFREE_XINERAMA */
return FALSE;
}
static void
deinit_multihead (GdkScreen *screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
free_monitors (screen_x11->monitors, screen_x11->n_monitors);
screen_x11->n_monitors = 0;
screen_x11->monitors = NULL;
}
static gboolean
compare_monitor (GdkX11Monitor *m1,
GdkX11Monitor *m2)
{
if (m1->geometry.x != m2->geometry.x ||
m1->geometry.y != m2->geometry.y ||
m1->geometry.width != m2->geometry.width ||
m1->geometry.height != m2->geometry.height)
return FALSE;
if (m1->width_mm != m2->width_mm ||
m1->height_mm != m2->height_mm)
return FALSE;
if (g_strcmp0 (m1->output_name, m2->output_name) != 0)
return FALSE;
if (g_strcmp0 (m1->manufacturer, m2->manufacturer) != 0)
return FALSE;
return TRUE;
}
static gboolean
compare_monitors (GdkX11Monitor *monitors1, gint n_monitors1,
GdkX11Monitor *monitors2, gint n_monitors2)
{
gint i;
if (n_monitors1 != n_monitors2)
return FALSE;
for (i = 0; i < n_monitors1; i++)
{
if (!compare_monitor (monitors1 + i, monitors2 + i))
return FALSE;
}
return TRUE;
}
static void
init_multihead (GdkScreen *screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
int opcode, firstevent, firsterror;
/* There are four different implementations of multihead support:
*
* 1. Fake Xinerama for debugging purposes
* 2. RandR 1.2
* 3. Solaris Xinerama
* 4. XFree86/Xorg Xinerama
*
* We use them in that order.
*/
if (init_fake_xinerama (screen))
return;
if (init_randr13 (screen))
return;
if (XQueryExtension (GDK_SCREEN_XDISPLAY (screen), "XINERAMA",
&opcode, &firstevent, &firsterror))
{
if (init_solaris_xinerama (screen))
return;
if (init_xfree_xinerama (screen))
return;
}
/* No multihead support of any kind for this screen */
screen_x11->n_monitors = 1;
screen_x11->monitors = g_new0 (GdkX11Monitor, 1);
screen_x11->primary_monitor = 0;
init_monitor_geometry (screen_x11->monitors, 0, 0,
WidthOfScreen (screen_x11->xscreen),
HeightOfScreen (screen_x11->xscreen));
}
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");
init_multihead (screen);
init_randr_support (screen);
_gdk_visual_init (screen);
_gdk_windowing_window_init (screen);
return screen;
}
/*
* It is important that we first request the selection
* notification, and then setup the initial state of
* is_composited to avoid a race condition here.
*/
void
_gdk_x11_screen_setup (GdkScreen *screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
screen_x11->cm_selection_atom = make_cm_atom (screen_x11->screen_num);
gdk_display_request_selection_notification (screen_x11->display,
screen_x11->cm_selection_atom);
screen_x11->is_composited = check_is_composited (screen_x11->display, screen_x11);
}
/**
* 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;
}
static void
init_randr_support (GdkScreen * screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XSelectInput (GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window,
StructureNotifyMask);
#ifdef HAVE_RANDR
XRRSelectInput (GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window,
RRScreenChangeNotifyMask |
RRCrtcChangeNotifyMask |
RROutputPropertyNotifyMask);
#endif
}
static void
process_monitors_change (GdkScreen *screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
gint n_monitors;
GdkX11Monitor *monitors;
gboolean changed;
n_monitors = screen_x11->n_monitors;
monitors = screen_x11->monitors;
screen_x11->n_monitors = 0;
screen_x11->monitors = NULL;
init_multihead (screen);
changed = !compare_monitors (monitors, n_monitors,
screen_x11->monitors, screen_x11->n_monitors);
free_monitors (monitors, n_monitors);
if (changed)
g_signal_emit_by_name (screen, "monitors-changed");
}
void
_gdk_x11_screen_size_changed (GdkScreen *screen,
XEvent *event)
{
gint width, height;
#ifdef HAVE_RANDR
GdkDisplayX11 *display_x11;
#endif
width = gdk_screen_get_width (screen);
height = gdk_screen_get_height (screen);
#ifdef HAVE_RANDR
display_x11 = GDK_DISPLAY_X11 (gdk_screen_get_display (screen));
if (display_x11->have_randr13 && event->type == ConfigureNotify)
{
g_signal_emit_by_name (screen, "monitors-changed");
return;
}
XRRUpdateConfiguration (event);
#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
process_monitors_change (screen);
if (width != gdk_screen_get_width (screen) ||
height != gdk_screen_get_height (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: (transfer full): 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: (transfer full) (element-type GdkWindow):
* 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))
{
gulong *stack = (gulong *) data;
GdkWindow *win;
int i;
for (i = 0; i < nitems_return; i++)
{
win = gdk_window_foreign_new_for_display (screen_x11->display,
(GdkNativeWindow)stack[i]);
if (win != NULL)
ret = g_list_append (ret, win);
}
}
}
if (data)
XFree (data);
return ret;
}
/* Sends a ClientMessage to all toplevel client windows */
static gboolean
gdk_event_send_client_message_to_all_recurse (GdkDisplay *display,
XEvent *xev,
guint32 xid,
guint level)
{
Atom type = None;
int format;
unsigned long nitems, after;
unsigned char *data;
Window *ret_children, ret_root, ret_parent;
unsigned int ret_nchildren;
gboolean send = FALSE;
gboolean found = FALSE;
gboolean result = FALSE;
int i;
gdk_error_trap_push ();
if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), xid,
gdk_x11_get_xatom_by_name_for_display (display, "WM_STATE"),
0, 0, False, AnyPropertyType,
&type, &format, &nitems, &after, &data) != Success)
goto out;
if (type)
{
send = TRUE;
XFree (data);
}
else
{
/* OK, we're all set, now let's find some windows to send this to */
if (!XQueryTree (GDK_DISPLAY_XDISPLAY (display), xid,
&ret_root, &ret_parent,
&ret_children, &ret_nchildren))
goto out;
for(i = 0; i < ret_nchildren; i++)
if (gdk_event_send_client_message_to_all_recurse (display, xev, ret_children[i], level + 1))
found = TRUE;
XFree (ret_children);
}
if (send || (!found && (level == 1)))
{
xev->xclient.window = xid;
_gdk_send_xevent (display, xid, False, NoEventMask, xev);
}
result = send || found;
out:
gdk_error_trap_pop_ignored ();
return result;
}
/**
* gdk_screen_broadcast_client_message:
* @screen: the #GdkScreen where the event will be broadcasted.
* @event: the #GdkEvent.
*
* On X11, sends an X ClientMessage event to all toplevel windows on
* @screen.
*
* Toplevel windows are determined by checking for the WM_STATE property,
* as described in the Inter-Client Communication Conventions Manual (ICCCM).
* If no windows are found with the WM_STATE property set, the message is
* sent to all children of the root window.
*
* On Windows, broadcasts a message registered with the name
* GDK_WIN32_CLIENT_MESSAGE to all top-level windows. The amount of
* data is limited to one long, i.e. four bytes.
*
* Since: 2.2
*/
void
gdk_screen_broadcast_client_message (GdkScreen *screen,
GdkEvent *event)
{
XEvent sev;
GdkWindow *root_window;
g_return_if_fail (event != NULL);
root_window = gdk_screen_get_root_window (screen);
/* Set up our event to send, with the exception of its target window */
sev.xclient.type = ClientMessage;
sev.xclient.display = GDK_WINDOW_XDISPLAY (root_window);
sev.xclient.format = event->client.data_format;
memcpy(&sev.xclient.data, &event->client.data, sizeof (sev.xclient.data));
sev.xclient.message_type =
gdk_x11_atom_to_xatom_for_display (GDK_WINDOW_DISPLAY (root_window),
event->client.message_type);
gdk_event_send_client_message_to_all_recurse (gdk_screen_get_display (screen),
&sev,
GDK_WINDOW_XID (root_window),
0);
}
static gboolean
check_transform (const gchar *xsettings_name,
GType src_type,
GType dest_type)
{
if (!g_value_type_transformable (src_type, dest_type))
{
g_warning ("Cannot transform xsetting %s of type %s to type %s\n",
xsettings_name,
g_type_name (src_type),
g_type_name (dest_type));
return FALSE;
}
else
return TRUE;
}
/**
* gdk_screen_get_setting:
* @screen: the #GdkScreen where the setting is located
* @name: the name of the setting
* @value: location to store the value of the setting
*
* Retrieves a desktop-wide setting such as double-click time
* for the #GdkScreen @screen.
*
* FIXME needs a list of valid settings here, or a link to
* more information.
*
* Returns: %TRUE if the setting existed and a value was stored
* in @value, %FALSE otherwise.
*
* Since: 2.2
**/
gboolean
gdk_screen_get_setting (GdkScreen *screen,
const gchar *name,
GValue *value)
{
const char *xsettings_name = NULL;
XSettingsResult result;
XSettingsSetting *setting = NULL;
GdkScreenX11 *screen_x11;
gboolean success = FALSE;
gint i;
GValue tmp_val = { 0, };
g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
screen_x11 = GDK_SCREEN_X11 (screen);
for (i = 0; i < GDK_SETTINGS_N_ELEMENTS(); i++)
if (strcmp (GDK_SETTINGS_GDK_NAME (i), name) == 0)
{
xsettings_name = GDK_SETTINGS_X_NAME (i);
break;
}
if (!xsettings_name)
goto out;
result = xsettings_client_get_setting (screen_x11->xsettings_client,
xsettings_name, &setting);
if (result != XSETTINGS_SUCCESS)
goto out;
switch (setting->type)
{
case XSETTINGS_TYPE_INT:
if (check_transform (xsettings_name, G_TYPE_INT, G_VALUE_TYPE (value)))
{
g_value_init (&tmp_val, G_TYPE_INT);
g_value_set_int (&tmp_val, setting->data.v_int);
g_value_transform (&tmp_val, value);
success = TRUE;
}
break;
case XSETTINGS_TYPE_STRING:
if (check_transform (xsettings_name, G_TYPE_STRING, G_VALUE_TYPE (value)))
{
g_value_init (&tmp_val, G_TYPE_STRING);
g_value_set_string (&tmp_val, setting->data.v_string);
g_value_transform (&tmp_val, value);
success = TRUE;
}
break;
case XSETTINGS_TYPE_COLOR:
if (!check_transform (xsettings_name, GDK_TYPE_COLOR, G_VALUE_TYPE (value)))
{
GdkColor color;
g_value_init (&tmp_val, GDK_TYPE_COLOR);
color.pixel = 0;
color.red = setting->data.v_color.red;
color.green = setting->data.v_color.green;
color.blue = setting->data.v_color.blue;
g_value_set_boxed (&tmp_val, &color);
g_value_transform (&tmp_val, value);
success = TRUE;
}
break;
}
g_value_unset (&tmp_val);
out:
if (setting)
xsettings_setting_free (setting);
if (success)
return TRUE;
else
return _gdk_x11_get_xft_setting (screen, name, value);
}
static void
cleanup_atoms(gpointer data)
{
NetWmSupportedAtoms *supported_atoms = data;
if (supported_atoms->atoms)
XFree (supported_atoms->atoms);
g_free (supported_atoms);
}
static void
fetch_net_wm_check_window (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
GdkDisplay *display;
Atom type;
gint format;
gulong n_items;
gulong bytes_after;
guchar *data;
Window *xwindow;
GTimeVal tv;
gint error;
screen_x11 = GDK_SCREEN_X11 (screen);
display = screen_x11->display;
g_return_if_fail (GDK_DISPLAY_X11 (display)->trusted_client);
g_get_current_time (&tv);
if (ABS (tv.tv_sec - screen_x11->last_wmspec_check_time) < 15)
return; /* we've checked recently */
screen_x11->last_wmspec_check_time = tv.tv_sec;
data = NULL;
XGetWindowProperty (screen_x11->xdisplay, screen_x11->xroot_window,
gdk_x11_get_xatom_by_name_for_display (display, "_NET_SUPPORTING_WM_CHECK"),
0, G_MAXLONG, False, XA_WINDOW, &type, &format,
&n_items, &bytes_after, &data);
if (type != XA_WINDOW)
{
if (data)
XFree (data);
return;
}
xwindow = (Window *)data;
if (screen_x11->wmspec_check_window == *xwindow)
{
XFree (xwindow);
return;
}
gdk_error_trap_push ();
/* Find out if this WM goes away, so we can reset everything. */
XSelectInput (screen_x11->xdisplay, *xwindow, StructureNotifyMask);
error = gdk_error_trap_pop ();
if (!error)
{
screen_x11->wmspec_check_window = *xwindow;
screen_x11->need_refetch_net_supported = TRUE;
screen_x11->need_refetch_wm_name = TRUE;
/* Careful, reentrancy */
_gdk_x11_screen_window_manager_changed (GDK_SCREEN (screen_x11));
}
else if (error == BadWindow)
{
/* Leftover property, try again immediately, new wm may be starting up */
screen_x11->last_wmspec_check_time = 0;
}
XFree (xwindow);
}
/**
* gdk_x11_screen_supports_net_wm_hint:
* @screen: the relevant #GdkScreen.
* @property: a property atom.
*
* This function is specific to the X11 backend of GDK, and indicates
* whether the window manager supports a certain hint from the
* Extended Window Manager Hints Specification. You can find this
* specification on
* <ulink url="http://www.freedesktop.org">http://www.freedesktop.org</ulink>.
*
* When using this function, keep in mind that the window manager
* can change over time; so you shouldn't use this function in
* a way that impacts persistent application state. A common bug
* is that your application can start up before the window manager
* does when the user logs in, and before the window manager starts
* gdk_x11_screen_supports_net_wm_hint() will return %FALSE for every property.
* You can monitor the window_manager_changed signal on #GdkScreen to detect
* a window manager change.
*
* Return value: %TRUE if the window manager supports @property
*
* Since: 2.2
**/
gboolean
gdk_x11_screen_supports_net_wm_hint (GdkScreen *screen,
GdkAtom property)
{
gulong i;
GdkScreenX11 *screen_x11;
NetWmSupportedAtoms *supported_atoms;
GdkDisplay *display;
g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
screen_x11 = GDK_SCREEN_X11 (screen);
display = screen_x11->display;
if (!G_LIKELY (GDK_DISPLAY_X11 (display)->trusted_client))
return FALSE;
supported_atoms = g_object_get_data (G_OBJECT (screen), "gdk-net-wm-supported-atoms");
if (!supported_atoms)
{
supported_atoms = g_new0 (NetWmSupportedAtoms, 1);
g_object_set_data_full (G_OBJECT (screen), "gdk-net-wm-supported-atoms", supported_atoms, cleanup_atoms);
}
fetch_net_wm_check_window (screen);
if (screen_x11->wmspec_check_window == None)
return FALSE;
if (screen_x11->need_refetch_net_supported)
{
/* WM has changed since we last got the supported list,
* refetch it.
*/
Atom type;
gint format;
gulong bytes_after;
screen_x11->need_refetch_net_supported = FALSE;
if (supported_atoms->atoms)
XFree (supported_atoms->atoms);
supported_atoms->atoms = NULL;
supported_atoms->n_atoms = 0;
XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), screen_x11->xroot_window,
gdk_x11_get_xatom_by_name_for_display (display, "_NET_SUPPORTED"),
0, G_MAXLONG, False, XA_ATOM, &type, &format,
&supported_atoms->n_atoms, &bytes_after,
(guchar **)&supported_atoms->atoms);
if (type != XA_ATOM)
return FALSE;
}
if (supported_atoms->atoms == NULL)
return FALSE;
i = 0;
while (i < supported_atoms->n_atoms)
{
if (supported_atoms->atoms[i] == gdk_x11_atom_to_xatom_for_display (display, property))
return TRUE;
++i;
}
return FALSE;
}
/**
* gdk_net_wm_supports:
* @property: a property atom.
*
* This function is specific to the X11 backend of GDK, and indicates
* whether the window manager for the default screen supports a certain
* hint from the Extended Window Manager Hints Specification. See
* gdk_x11_screen_supports_net_wm_hint() for complete details.
*
* Return value: %TRUE if the window manager supports @property
**/
gboolean
gdk_net_wm_supports (GdkAtom property)
{
return gdk_x11_screen_supports_net_wm_hint (gdk_screen_get_default (), property);
}
static void
refcounted_grab_server (Display *xdisplay)
{
GdkDisplay *display = gdk_x11_lookup_xdisplay (xdisplay);
gdk_x11_display_grab (display);
}
static void
refcounted_ungrab_server (Display *xdisplay)
{
GdkDisplay *display = gdk_x11_lookup_xdisplay (xdisplay);
gdk_x11_display_ungrab (display);
}
static GdkFilterReturn
gdk_xsettings_client_event_filter (GdkXEvent *xevent,
GdkEvent *event,
gpointer data)
{
GdkScreenX11 *screen = data;
if (xsettings_client_process_event (screen->xsettings_client, (XEvent *)xevent))
return GDK_FILTER_REMOVE;
else
return GDK_FILTER_CONTINUE;
}
static Bool
gdk_xsettings_watch_cb (Window window,
Bool is_start,
long mask,
void *cb_data)
{
GdkWindow *gdkwin;
GdkScreen *screen = cb_data;
gdkwin = gdk_window_lookup_for_display (gdk_screen_get_display (screen), window);
if (is_start)
{
if (gdkwin)
g_object_ref (gdkwin);
else
{
gdkwin = gdk_window_foreign_new_for_display (gdk_screen_get_display (screen), window);
/* gdk_window_foreign_new_for_display() can fail and return NULL if the
* window has already been destroyed.
*/
if (!gdkwin)
return False;
}
gdk_window_add_filter (gdkwin, gdk_xsettings_client_event_filter, screen);
}
else
{
if (!gdkwin)
{
/* gdkwin should not be NULL here, since if starting the watch succeeded
* we have a reference on the window. It might mean that the caller didn't
* remove the watch when it got a DestroyNotify event. Or maybe the
* caller ignored the return value when starting the watch failed.
*/
g_warning ("gdk_xsettings_watch_cb(): Couldn't find window to unwatch");
return False;
}
gdk_window_remove_filter (gdkwin, gdk_xsettings_client_event_filter, screen);
g_object_unref (gdkwin);
}
return True;
}
static void
gdk_xsettings_notify_cb (const char *name,
XSettingsAction action,
XSettingsSetting *setting,
void *data)
{
GdkEvent new_event;
GdkScreen *screen = data;
GdkScreenX11 *screen_x11 = data;
int i;
if (screen_x11->xsettings_in_init)
return;
new_event.type = GDK_SETTING;
new_event.setting.window = gdk_screen_get_root_window (screen);
new_event.setting.send_event = FALSE;
new_event.setting.name = NULL;
for (i = 0; i < GDK_SETTINGS_N_ELEMENTS() ; i++)
if (strcmp (GDK_SETTINGS_X_NAME (i), name) == 0)
{
new_event.setting.name = (char*) GDK_SETTINGS_GDK_NAME (i);
break;
}
if (!new_event.setting.name)
return;
switch (action)
{
case XSETTINGS_ACTION_NEW:
new_event.setting.action = GDK_SETTING_ACTION_NEW;
break;
case XSETTINGS_ACTION_CHANGED:
new_event.setting.action = GDK_SETTING_ACTION_CHANGED;
break;
case XSETTINGS_ACTION_DELETED:
new_event.setting.action = GDK_SETTING_ACTION_DELETED;
break;
}
gdk_event_put (&new_event);
}
void
_gdk_screen_x11_events_init (GdkScreen *screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
/* Keep a flag to avoid extra notifies that we don't need
*/
screen_x11->xsettings_in_init = TRUE;
screen_x11->xsettings_client = xsettings_client_new_with_grab_funcs (screen_x11->xdisplay,
screen_x11->screen_num,
gdk_xsettings_notify_cb,
gdk_xsettings_watch_cb,
screen,
refcounted_grab_server,
refcounted_ungrab_server);
screen_x11->xsettings_in_init = FALSE;
}
/**
* gdk_x11_screen_get_window_manager_name:
* @screen: a #GdkScreen
*
* Returns the name of the window manager for @screen.
*
* Return value: the name of the window manager screen @screen, or
* "unknown" if the window manager is unknown. The string is owned by GDK
* and should not be freed.
*
* Since: 2.2
**/
const char*
gdk_x11_screen_get_window_manager_name (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
screen_x11 = GDK_SCREEN_X11 (screen);
if (!G_LIKELY (GDK_DISPLAY_X11 (screen_x11->display)->trusted_client))
return screen_x11->window_manager_name;
fetch_net_wm_check_window (screen);
if (screen_x11->need_refetch_wm_name)
{
/* Get the name of the window manager */
screen_x11->need_refetch_wm_name = FALSE;
g_free (screen_x11->window_manager_name);
screen_x11->window_manager_name = g_strdup ("unknown");
if (screen_x11->wmspec_check_window != None)
{
Atom type;
gint format;
gulong n_items;
gulong bytes_after;
gchar *name;
name = NULL;
gdk_error_trap_push ();
XGetWindowProperty (GDK_DISPLAY_XDISPLAY (screen_x11->display),
screen_x11->wmspec_check_window,
gdk_x11_get_xatom_by_name_for_display (screen_x11->display,
"_NET_WM_NAME"),
0, G_MAXLONG, False,
gdk_x11_get_xatom_by_name_for_display (screen_x11->display,
"UTF8_STRING"),
&type, &format,
&n_items, &bytes_after,
(guchar **)&name);
gdk_error_trap_pop_ignored ();
if (name != NULL)
{
g_free (screen_x11->window_manager_name);
screen_x11->window_manager_name = g_strdup (name);
XFree (name);
}
}
}
return GDK_SCREEN_X11 (screen)->window_manager_name;
}
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