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gtk/gdk/x11/gdkscreen-x11.c
Alexander Larsson b0d0bf7f7d Avoid spurious emissions of monitors-changed 
The monitor change detection code in _gdk_x11_screen_size_changed() and
process_monitors_change() goes to some length to make sure its only emitted
when there is an actual change to the data visible via the GdkScreen monitors
api.

However, commit 662e69ad added some code that always emits "monitors-changed"
in _gdk_x11_screen_size_changed when we have randr13 and get a ConfigureNotify
on the root window (even though we may already have emitted it in the
RRScreenChangesNotify event!).

As far as I can tell this is due to a comment in the bug referenced by the
commit (https://bugzilla.gnome.org/show_bug.cgi?id=601712#c4) where it says:

  This version of the patch changes GdkDisplay to emit "monitors-changed" when
  the primary monitor changes (see the change in _gdk_x11_screen_size_changed).

And, if you remove this part of the change the signal is not emitted when just
the primary is changed. However, this is not really the right approach. We
should just also check for if the primary changes in process_monitors_change()
to avoid spurious signal emissions.

https://bugzilla.gnome.org/show_bug.cgi?id=643216
(cherry picked from commit 0b0f110152)

Conflicts:

	gdk/x11/gdkscreen-x11.c
2011-02-24 20:05:45 +01:00

1445 lines
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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_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)
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: 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;
}
/**
* gdk_screen_get_default_colormap:
* @screen: a #GdkScreen
*
* Gets the default colormap for @screen.
*
* Returns: (transfer none): 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);
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: 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_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.
*
* 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 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: (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;
gint primary_monitor;
GdkX11Monitor *monitors;
gboolean changed;
primary_monitor = screen_x11->primary_monitor;
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) ||
screen_x11->primary_monitor != primary_monitor;
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)
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: 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;
}
#define __GDK_SCREEN_X11_C__
#include "gdkaliasdef.c"
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