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gtk/gdk/x11/gdkscreen-x11.c
Carlos Garcia Campos 5261d14d6f Fix memory leak in gdkscreen-x11 
When RandR 1.2 X driver doesn't return any usable multihead data the
monitors array is freed, without freeing the memory allocated by the array
elements before. Fixes bug #578354
2009-04-10 00:14:23 -04:00

1349 lines
34 KiB
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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: 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);
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;
}
static GdkX11Monitor *
get_monitor (GdkScreen *screen,
int monitor_num)
{
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
g_return_val_if_fail (monitor_num < screen_x11->n_monitors, NULL);
g_return_val_if_fail (monitor_num >= 0, NULL);
return &(screen_x11->monitors[monitor_num]);
}
/**
* gdk_screen_get_monitor_width_mm:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor
*
* 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)
{
return get_monitor (screen, monitor_num)->width_mm;
}
/**
* gdk_screen_get_monitor_height_mm:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor
*
* 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)
{
return get_monitor (screen, monitor_num)->height_mm;
}
/**
* gdk_screen_get_monitor_plug_name:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor
*
* 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)
{
return g_strdup (get_monitor (screen, monitor_num)->output_name);
}
/**
* gdk_x11_screen_get_monitor_output:
* @screen: a #GdkScreen
* @monitor_num: number of the monitor
*
* 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)
{
return get_monitor (screen, monitor_num)->output;
}
/**
* 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)
{
if (dest)
{
GdkX11Monitor *monitor = get_monitor (screen, monitor_num);
*dest = monitor->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: 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;
}
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);
}
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;
}
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;
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)
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);
}
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);
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);
}
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);
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);
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");
screen_x11->cm_selection_atom = make_cm_atom (screen_number);
screen_x11->is_composited = check_is_composited (display, screen_x11);
init_multihead (screen);
init_randr_support (screen);
_gdk_visual_init (screen);
_gdk_windowing_window_init (screen);
return screen;
}
/**
* 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;
GdkDisplayX11 *display_x11;
gboolean monitors_changed;
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: 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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