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gtk2/gdk/x11/gdkscreen-x11.c
Priit Laes 50a32b4b99 gdk: x11: Fill GdkMonitor manufacturer with PNP id from EDID 
Previously, the manufacturer property of the GdkMonitor was NULL,
and having at least PNP id at GdkMonitor.manufacturer makes it
possible to distinguish between different monitors programmatically.
2019-06-26 12:07:52 +03:00

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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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkprivate-x11.h"
#include "xsettings-client.h"
#include "gdkmonitor-x11.h"
#include <glib.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xatom.h>
#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_x11_screen_dispose (GObject *object);
static void gdk_x11_screen_finalize (GObject *object);
static void init_randr_support (GdkScreen *screen);
static void process_monitors_change (GdkScreen *screen);
enum
{
WINDOW_MANAGER_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkX11Screen, gdk_x11_screen, GDK_TYPE_SCREEN)
typedef struct _NetWmSupportedAtoms NetWmSupportedAtoms;
struct _NetWmSupportedAtoms
{
Atom *atoms;
gulong n_atoms;
};
static void
gdk_x11_screen_init (GdkX11Screen *screen)
{
}
static GdkDisplay *
gdk_x11_screen_get_display (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->display;
}
gint
gdk_x11_screen_get_width (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->width;
}
gint
gdk_x11_screen_get_height (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->height;
}
static gint
gdk_x11_screen_get_width_mm (GdkScreen *screen)
{
return WidthMMOfScreen (GDK_X11_SCREEN (screen)->xscreen);
}
static gint
gdk_x11_screen_get_height_mm (GdkScreen *screen)
{
return HeightMMOfScreen (GDK_X11_SCREEN (screen)->xscreen);
}
gint
gdk_x11_screen_get_number (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->screen_num;
}
static GdkWindow *
gdk_x11_screen_get_root_window (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->root_window;
}
static void
gdk_x11_screen_dispose (GObject *object)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (object);
int i;
for (i = 0; i < 32; ++i)
{
if (x11_screen->subwindow_gcs[i])
{
XFreeGC (x11_screen->xdisplay, x11_screen->subwindow_gcs[i]);
x11_screen->subwindow_gcs[i] = 0;
}
}
_gdk_x11_xsettings_finish (x11_screen);
if (x11_screen->root_window)
_gdk_window_destroy (x11_screen->root_window, TRUE);
for (i = 0; i < x11_screen->nvisuals; i++)
g_object_run_dispose (G_OBJECT (x11_screen->visuals[i]));
G_OBJECT_CLASS (gdk_x11_screen_parent_class)->dispose (object);
x11_screen->xdisplay = NULL;
x11_screen->xscreen = NULL;
x11_screen->screen_num = -1;
x11_screen->xroot_window = None;
x11_screen->wmspec_check_window = None;
}
static void
gdk_x11_screen_finalize (GObject *object)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (object);
gint i;
if (x11_screen->root_window)
g_object_unref (x11_screen->root_window);
/* Visual Part */
for (i = 0; i < x11_screen->nvisuals; i++)
g_object_unref (x11_screen->visuals[i]);
g_free (x11_screen->visuals);
g_hash_table_destroy (x11_screen->visual_hash);
g_free (x11_screen->window_manager_name);
G_OBJECT_CLASS (gdk_x11_screen_parent_class)->finalize (object);
}
/**
* gdk_x11_screen_get_monitor_output:
* @screen: (type GdkX11Screen): 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)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
GdkX11Monitor *monitor;
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 < x11_display->monitors->len, None);
monitor = x11_display->monitors->pdata[monitor_num];
return monitor->output;
}
static int
get_current_desktop (GdkScreen *screen)
{
Display *display;
Window win;
Atom current_desktop, type;
int format;
unsigned long n_items, bytes_after;
unsigned char *data_return = NULL;
int workspace = 0;
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_CURRENT_DESKTOP")))
return workspace;
display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
win = XRootWindow (display, GDK_SCREEN_XNUMBER (screen));
current_desktop = XInternAtom (display, "_NET_CURRENT_DESKTOP", True);
XGetWindowProperty (display,
win,
current_desktop,
0, G_MAXLONG,
False, XA_CARDINAL,
&type, &format, &n_items, &bytes_after,
&data_return);
if (type == XA_CARDINAL && format == 32 && n_items > 0)
workspace = ((long *) data_return)[0];
if (data_return)
XFree (data_return);
return workspace;
}
void
gdk_x11_screen_get_work_area (GdkScreen *screen,
GdkRectangle *area)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
Atom workarea;
Atom type;
Window win;
int format;
gulong num;
gulong leftovers;
gulong max_len = 4 * 32;
guchar *ret_workarea = NULL;
long *workareas;
int result;
int disp_screen;
int desktop;
Display *display;
display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
disp_screen = GDK_SCREEN_XNUMBER (screen);
workarea = XInternAtom (display, "_NET_WORKAREA", True);
/* Defaults in case of error */
area->x = 0;
area->y = 0;
area->width = gdk_x11_screen_get_width (screen);
area->height = gdk_x11_screen_get_height (screen);
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_WORKAREA")))
return;
if (workarea == None)
return;
win = XRootWindow (display, disp_screen);
result = XGetWindowProperty (display,
win,
workarea,
0,
max_len,
False,
AnyPropertyType,
&type,
&format,
&num,
&leftovers,
&ret_workarea);
if (result != Success ||
type == None ||
format == 0 ||
leftovers ||
num % 4 != 0)
goto out;
desktop = get_current_desktop (screen);
if (desktop + 1 > num / 4) /* fvwm gets this wrong */
goto out;
workareas = (long *) ret_workarea;
area->x = workareas[desktop * 4];
area->y = workareas[desktop * 4 + 1];
area->width = workareas[desktop * 4 + 2];
area->height = workareas[desktop * 4 + 3];
area->x /= x11_screen->window_scale;
area->y /= x11_screen->window_scale;
area->width /= x11_screen->window_scale;
area->height /= x11_screen->window_scale;
out:
if (ret_workarea)
XFree (ret_workarea);
}
static GdkVisual *
gdk_x11_screen_get_rgba_visual (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
return x11_screen->rgba_visual;
}
/**
* gdk_x11_screen_get_xscreen:
* @screen: (type GdkX11Screen): a #GdkScreen
*
* Returns the screen of a #GdkScreen.
*
* Returns: (transfer none): an Xlib Screen*
*
* Since: 2.2
*/
Screen *
gdk_x11_screen_get_xscreen (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->xscreen;
}
/**
* gdk_x11_screen_get_screen_number:
* @screen: (type GdkX11Screen): a #GdkScreen
*
* Returns the index of a #GdkScreen.
*
* Returns: the position of @screen among the screens
* of its display
*
* Since: 2.2
*/
int
gdk_x11_screen_get_screen_number (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->screen_num;
}
static Atom
get_cm_atom (GdkX11Screen *x11_screen)
{
return _gdk_x11_get_xatom_for_display_printf (x11_screen->display, "_NET_WM_CM_S%d", x11_screen->screen_num);
}
static gboolean
check_is_composited (GdkDisplay *display,
GdkX11Screen *x11_screen)
{
Window xwindow;
xwindow = XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (display), get_cm_atom (x11_screen));
return xwindow != None;
}
static GdkX11Monitor *
find_monitor_by_output (GdkX11Display *x11_display, XID output)
{
int i;
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->output == output)
return monitor;
}
return NULL;
}
static GdkSubpixelLayout
translate_subpixel_order (int subpixel)
{
switch (subpixel)
{
case 1: return GDK_SUBPIXEL_LAYOUT_HORIZONTAL_RGB;
case 2: return GDK_SUBPIXEL_LAYOUT_HORIZONTAL_BGR;
case 3: return GDK_SUBPIXEL_LAYOUT_VERTICAL_RGB;
case 4: return GDK_SUBPIXEL_LAYOUT_VERTICAL_BGR;
case 5: return GDK_SUBPIXEL_LAYOUT_NONE;
default: return GDK_SUBPIXEL_LAYOUT_UNKNOWN;
}
}
static gboolean
init_randr15 (GdkScreen *screen, gboolean *changed)
{
#ifdef HAVE_RANDR15
GdkDisplay *display = gdk_screen_get_display (screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (display);
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
XRRScreenResources *resources;
RROutput primary_output = None;
RROutput first_output = None;
int i;
gboolean randr12_compat = FALSE;
XRRMonitorInfo *rr_monitors;
int num_rr_monitors;
int old_primary;
if (!x11_display->have_randr15)
return FALSE;
resources = XRRGetScreenResourcesCurrent (x11_screen->xdisplay,
x11_screen->xroot_window);
if (!resources)
return FALSE;
rr_monitors = XRRGetMonitors (x11_screen->xdisplay,
x11_screen->xroot_window,
True,
&num_rr_monitors);
if (!rr_monitors)
return FALSE;
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
monitor->add = FALSE;
monitor->remove = TRUE;
}
for (i = 0; i < num_rr_monitors; i++)
{
RROutput output = rr_monitors[i].outputs[0];
XRROutputInfo *output_info;
GdkX11Monitor *monitor;
GdkRectangle geometry;
GdkRectangle newgeo;
char *name;
char *manufacturer = NULL;
int refresh_rate = 0;
gdk_x11_display_error_trap_push (display);
output_info = XRRGetOutputInfo (x11_screen->xdisplay, resources, output);
if (gdk_x11_display_error_trap_pop (display))
continue;
if (output_info == NULL)
continue;
/* Non RandR1.2+ X driver have output name "default" */
randr12_compat |= !g_strcmp0 (output_info->name, "default");
if (output_info->connection == RR_Disconnected)
{
XRRFreeOutputInfo (output_info);
continue;
}
if (first_output == None)
first_output = output;
if (output_info->crtc)
{
XRRCrtcInfo *crtc = XRRGetCrtcInfo (x11_screen->xdisplay, resources, output_info->crtc);
int j;
for (j = 0; j < resources->nmode; j++)
{
XRRModeInfo *xmode = &resources->modes[j];
if (xmode->id == crtc->mode)
{
if (xmode->hTotal != 0 && xmode->vTotal != 0)
refresh_rate = (1000 * xmode->dotClock) / (xmode->hTotal * xmode->vTotal);
break;
}
}
XRRFreeCrtcInfo (crtc);
}
monitor = find_monitor_by_output (x11_display, output);
if (monitor)
monitor->remove = FALSE;
else
{
monitor = g_object_new (GDK_TYPE_X11_MONITOR,
"display", display,
NULL);
monitor->output = output;
monitor->add = TRUE;
g_ptr_array_add (x11_display->monitors, monitor);
}
/* Fetch minimal manufacturer information (PNP ID) from EDID */
{
#define EDID_LENGTH 128
Atom actual_type, edid_atom;
char tmp[3];
int actual_format;
unsigned char *prop;
unsigned long nbytes, bytes_left;
Display *disp = GDK_DISPLAY_XDISPLAY (x11_display);
edid_atom = XInternAtom (disp, RR_PROPERTY_RANDR_EDID, FALSE);
XRRGetOutputProperty (disp, output,
edid_atom,
0,
EDID_LENGTH,
FALSE,
FALSE,
AnyPropertyType,
&actual_type,
&actual_format,
&nbytes,
&bytes_left,
&prop);
// Check partial EDID header (whole header: 00 ff ff ff ff ff ff 00)
if (nbytes >= EDID_LENGTH && prop[0] == 0x00 && prop[1] == 0xff)
{
/* decode the Vendor ID from three 5 bit words packed into 2 bytes
* /--08--\/--09--\
* 7654321076543210
* |\---/\---/\---/
* R C1 C2 C3 */
tmp[0] = 'A' + ((prop[8] & 0x7c) / 4) - 1;
tmp[1] = 'A' + ((prop[8] & 0x3) * 8) + ((prop[9] & 0xe0) / 32) - 1;
tmp[2] = 'A' + (prop[9] & 0x1f) - 1;
manufacturer = g_strndup (tmp, sizeof (tmp));
}
XFree(prop);
#undef EDID_LENGTH
}
gdk_monitor_get_geometry (GDK_MONITOR (monitor), &geometry);
name = g_strndup (output_info->name, output_info->nameLen);
newgeo.x = rr_monitors[i].x / x11_screen->window_scale;
newgeo.y = rr_monitors[i].y / x11_screen->window_scale;
newgeo.width = rr_monitors[i].width / x11_screen->window_scale;
newgeo.height = rr_monitors[i].height / x11_screen->window_scale;
if (newgeo.x != geometry.x ||
newgeo.y != geometry.y ||
newgeo.width != geometry.width ||
newgeo.height != geometry.height ||
rr_monitors[i].mwidth != gdk_monitor_get_width_mm (GDK_MONITOR (monitor)) ||
rr_monitors[i].mheight != gdk_monitor_get_height_mm (GDK_MONITOR (monitor)) ||
g_strcmp0 (name, gdk_monitor_get_model (GDK_MONITOR (monitor))))
*changed = TRUE;
gdk_monitor_set_position (GDK_MONITOR (monitor), newgeo.x, newgeo.y);
gdk_monitor_set_size (GDK_MONITOR (monitor), newgeo.width, newgeo.height);
g_object_notify (G_OBJECT (monitor), "workarea");
gdk_monitor_set_physical_size (GDK_MONITOR (monitor),
rr_monitors[i].mwidth,
rr_monitors[i].mheight);
gdk_monitor_set_subpixel_layout (GDK_MONITOR (monitor),
translate_subpixel_order (output_info->subpixel_order));
gdk_monitor_set_refresh_rate (GDK_MONITOR (monitor), refresh_rate);
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), x11_screen->window_scale);
gdk_monitor_set_model (GDK_MONITOR (monitor), name);
gdk_monitor_set_connector (GDK_MONITOR (monitor), name);
gdk_monitor_set_manufacturer (GDK_MONITOR (monitor), manufacturer);
g_free (manufacturer);
g_free (name);
if (rr_monitors[i].primary)
primary_output = monitor->output;
XRRFreeOutputInfo (output_info);
}
XRRFreeMonitors (rr_monitors);
XRRFreeScreenResources (resources);
/* non RandR 1.2+ X driver doesn't return any usable multihead data */
if (randr12_compat)
{
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->remove)
gdk_display_monitor_removed (display, GDK_MONITOR (monitor));
}
g_ptr_array_remove_range (x11_display->monitors, 0, x11_display->monitors->len);
return FALSE;
}
for (i = x11_display->monitors->len - 1; i >= 0; i--)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->add)
{
gdk_display_monitor_added (display, GDK_MONITOR (monitor));
*changed = TRUE;
}
else if (monitor->remove)
{
g_object_ref (monitor);
g_ptr_array_remove (x11_display->monitors, monitor);
gdk_display_monitor_removed (display, GDK_MONITOR (monitor));
g_object_unref (monitor);
*changed = TRUE;
}
}
old_primary = x11_display->primary_monitor;
x11_display->primary_monitor = 0;
for (i = 0; i < x11_display->monitors->len; ++i)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->output == primary_output)
{
x11_display->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 (gdk_monitor_get_model (GDK_MONITOR (monitor)), "LVDS", 4) == 0)
{
x11_display->primary_monitor = i;
break;
}
/* No primary specified and no LVDS found */
if (monitor->output == first_output)
x11_display->primary_monitor = i;
}
if (x11_display->primary_monitor != old_primary)
*changed = TRUE;
return x11_display->monitors->len > 0;
#endif
return FALSE;
}
static gboolean
init_randr13 (GdkScreen *screen, gboolean *changed)
{
#ifdef HAVE_RANDR
GdkDisplay *display = gdk_screen_get_display (screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (display);
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
XRRScreenResources *resources;
RROutput primary_output = None;
RROutput first_output = None;
int i;
gboolean randr12_compat = FALSE;
int old_primary;
if (!x11_display->have_randr13)
return FALSE;
resources = XRRGetScreenResourcesCurrent (x11_screen->xdisplay,
x11_screen->xroot_window);
if (!resources)
return FALSE;
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
monitor->add = FALSE;
monitor->remove = TRUE;
}
for (i = 0; i < resources->noutput; ++i)
{
RROutput output = resources->outputs[i];
XRROutputInfo *output_info =
XRRGetOutputInfo (x11_screen->xdisplay, resources, output);
/* Non RandR1.2+ X driver have output name "default" */
randr12_compat |= !g_strcmp0 (output_info->name, "default");
if (output_info->connection == RR_Disconnected)
{
XRRFreeOutputInfo (output_info);
continue;
}
if (output_info->crtc)
{
GdkX11Monitor *monitor;
XRRCrtcInfo *crtc = XRRGetCrtcInfo (x11_screen->xdisplay, resources, output_info->crtc);
char *name;
GdkRectangle geometry;
GdkRectangle newgeo;
int j;
int refresh_rate = 0;
for (j = 0; j < resources->nmode; j++)
{
XRRModeInfo *xmode = &resources->modes[j];
if (xmode->id == crtc->mode)
{
if (xmode->hTotal != 0 && xmode->vTotal != 0)
refresh_rate = (1000 * xmode->dotClock) / (xmode->hTotal * xmode->vTotal);
break;
}
}
monitor = find_monitor_by_output (x11_display, output);
if (monitor)
monitor->remove = FALSE;
else
{
monitor = g_object_new (gdk_x11_monitor_get_type (),
"display", display,
NULL);
monitor->output = output;
monitor->add = TRUE;
g_ptr_array_add (x11_display->monitors, monitor);
}
gdk_monitor_get_geometry (GDK_MONITOR (monitor), &geometry);
name = g_strndup (output_info->name, output_info->nameLen);
newgeo.x = crtc->x / x11_screen->window_scale;
newgeo.y = crtc->y / x11_screen->window_scale;
newgeo.width = crtc->width / x11_screen->window_scale;
newgeo.height = crtc->height / x11_screen->window_scale;
if (newgeo.x != geometry.x ||
newgeo.y != geometry.y ||
newgeo.width != geometry.width ||
newgeo.height != geometry.height ||
output_info->mm_width != gdk_monitor_get_width_mm (GDK_MONITOR (monitor)) ||
output_info->mm_height != gdk_monitor_get_height_mm (GDK_MONITOR (monitor)) ||
g_strcmp0 (name, gdk_monitor_get_model (GDK_MONITOR (monitor))) != 0)
*changed = TRUE;
gdk_monitor_set_position (GDK_MONITOR (monitor), newgeo.x, newgeo.y);
gdk_monitor_set_size (GDK_MONITOR (monitor), newgeo.width, newgeo.height);
g_object_notify (G_OBJECT (monitor), "workarea");
gdk_monitor_set_physical_size (GDK_MONITOR (monitor),
output_info->mm_width,
output_info->mm_height);
gdk_monitor_set_subpixel_layout (GDK_MONITOR (monitor),
translate_subpixel_order (output_info->subpixel_order));
gdk_monitor_set_refresh_rate (GDK_MONITOR (monitor), refresh_rate);
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), x11_screen->window_scale);
gdk_monitor_set_model (GDK_MONITOR (monitor), name);
g_free (name);
XRRFreeCrtcInfo (crtc);
}
XRRFreeOutputInfo (output_info);
}
if (resources->noutput > 0)
first_output = resources->outputs[0];
XRRFreeScreenResources (resources);
if (randr12_compat)
{
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->remove)
gdk_display_monitor_removed (display, GDK_MONITOR (monitor));
}
g_ptr_array_remove_range (x11_display->monitors, 0, x11_display->monitors->len);
return FALSE;
}
for (i = x11_display->monitors->len - 1; i >= 0; i--)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->add)
{
gdk_display_monitor_added (display, GDK_MONITOR (monitor));
*changed = TRUE;
}
else if (monitor->remove)
{
g_object_ref (monitor);
g_ptr_array_remove (x11_display->monitors, monitor);
gdk_display_monitor_removed (display, GDK_MONITOR (monitor));
g_object_unref (monitor);
*changed = TRUE;
}
}
old_primary = x11_display->primary_monitor;
x11_display->primary_monitor = 0;
primary_output = XRRGetOutputPrimary (x11_screen->xdisplay,
x11_screen->xroot_window);
for (i = 0; i < x11_display->monitors->len; ++i)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->output == primary_output)
{
x11_display->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 (gdk_monitor_get_model (GDK_MONITOR (monitor)), "LVDS", 4) == 0)
{
x11_display->primary_monitor = i;
break;
}
/* No primary specified and no LVDS found */
if (monitor->output == first_output)
x11_display->primary_monitor = i;
}
if (x11_display->primary_monitor != old_primary)
*changed = TRUE;
return x11_display->monitors->len > 0;
#endif
return FALSE;
}
static void
init_no_multihead (GdkScreen *screen, gboolean *changed)
{
GdkDisplay *display = gdk_screen_get_display (screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (display);
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkX11Monitor *monitor;
GdkRectangle geometry;
GdkRectangle newgeo;
int i;
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
monitor->add = FALSE;
monitor->remove = TRUE;
}
monitor = find_monitor_by_output (x11_display, 0);
if (monitor)
monitor->remove = FALSE;
else
{
monitor = g_object_new (gdk_x11_monitor_get_type (),
"display", x11_display,
NULL);
monitor->output = 0;
monitor->add = TRUE;
g_ptr_array_add (x11_display->monitors, monitor);
}
gdk_monitor_get_geometry (GDK_MONITOR (monitor), &geometry);
newgeo.x = 0;
newgeo.y = 0;
newgeo.width = DisplayWidth (x11_display->xdisplay, x11_screen->screen_num) /
x11_screen->window_scale;
newgeo.height = DisplayHeight (x11_display->xdisplay, x11_screen->screen_num) /
x11_screen->window_scale;
if (newgeo.x != geometry.x ||
newgeo.y != geometry.y ||
newgeo.width != geometry.width ||
newgeo.height != geometry.height ||
gdk_x11_screen_get_width_mm (screen) != gdk_monitor_get_width_mm (GDK_MONITOR (monitor)) ||
gdk_x11_screen_get_height_mm (screen) != gdk_monitor_get_height_mm (GDK_MONITOR (monitor)))
*changed = TRUE;
gdk_monitor_set_position (GDK_MONITOR (monitor), newgeo.x, newgeo.y);
gdk_monitor_set_size (GDK_MONITOR (monitor), newgeo.width, newgeo.height);
g_object_notify (G_OBJECT (monitor), "workarea");
gdk_monitor_set_physical_size (GDK_MONITOR (monitor),
gdk_x11_screen_get_width_mm (screen),
gdk_x11_screen_get_height_mm (screen));
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), x11_screen->window_scale);
if (x11_display->primary_monitor != 0)
*changed = TRUE;
x11_display->primary_monitor = 0;
for (i = x11_display->monitors->len - 1; i >= 0; i--)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
if (monitor->add)
{
gdk_display_monitor_added (GDK_DISPLAY (x11_display), GDK_MONITOR (monitor));
*changed = TRUE;
}
else if (monitor->remove)
{
g_object_ref (monitor);
g_ptr_array_remove (x11_display->monitors, monitor);
gdk_display_monitor_removed (GDK_DISPLAY (x11_display), GDK_MONITOR (monitor));
g_object_unref (monitor);
*changed = TRUE;
}
}
}
static gboolean
init_multihead (GdkScreen *screen)
{
gboolean any_changed = FALSE;
if (!init_randr15 (screen, &any_changed) &&
!init_randr13 (screen, &any_changed))
init_no_multihead (screen, &any_changed);
return any_changed;
}
static void
update_bounding_box (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
gint i, x1, y1, x2, y2;
x1 = y1 = G_MAXINT;
x2 = y2 = G_MININT;
for (i = 0; i < x11_display->monitors->len; i++)
{
GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
GdkRectangle geometry;
gdk_monitor_get_geometry (GDK_MONITOR (monitor), &geometry);
x1 = MIN (x1, geometry.x);
y1 = MIN (y1, geometry.y);
x2 = MAX (x2, geometry.x + geometry.width);
y2 = MAX (y2, geometry.y + geometry.height);
}
x11_screen->width = x2 - x1;
x11_screen->height = y2 - y1;
}
GdkScreen *
_gdk_x11_screen_new (GdkDisplay *display,
gint screen_number)
{
GdkScreen *screen;
GdkX11Screen *x11_screen;
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
const char *scale_str;
screen = g_object_new (GDK_TYPE_X11_SCREEN, NULL);
x11_screen = GDK_X11_SCREEN (screen);
x11_screen->display = display;
x11_screen->xdisplay = display_x11->xdisplay;
x11_screen->xscreen = ScreenOfDisplay (display_x11->xdisplay, screen_number);
x11_screen->screen_num = screen_number;
x11_screen->xroot_window = RootWindow (display_x11->xdisplay,screen_number);
x11_screen->wmspec_check_window = None;
/* we want this to be always non-null */
x11_screen->window_manager_name = g_strdup ("unknown");
scale_str = g_getenv ("GDK_SCALE");
if (scale_str)
{
x11_screen->fixed_window_scale = TRUE;
x11_screen->window_scale = atol (scale_str);
if (x11_screen->window_scale == 0)
x11_screen->window_scale = 1;
}
else
x11_screen->window_scale = 1;
init_randr_support (screen);
init_multihead (screen);
_gdk_x11_screen_init_visuals (screen);
_gdk_x11_screen_init_root_window (screen);
update_bounding_box (screen);
return screen;
}
void
_gdk_x11_screen_set_window_scale (GdkX11Screen *x11_screen,
gint scale)
{
GList *toplevels, *l;
GdkWindow *root;
if (x11_screen->window_scale == scale)
return;
x11_screen->window_scale = scale;
root = x11_screen->root_window;
GDK_WINDOW_IMPL_X11 (root->impl)->window_scale = scale;
toplevels = gdk_screen_get_toplevel_windows (GDK_SCREEN (x11_screen));
for (l = toplevels; l != NULL; l = l->next)
{
GdkWindow *window = l->data;
_gdk_x11_window_set_window_scale (window, scale);
}
process_monitors_change (GDK_SCREEN (x11_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)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
gdk_display_request_selection_notification (x11_screen->display,
gdk_x11_xatom_to_atom_for_display (x11_screen->display, get_cm_atom (x11_screen)));
x11_screen->is_composited = check_is_composited (x11_screen->display, x11_screen);
}
static gboolean
gdk_x11_screen_is_composited (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
return x11_screen->is_composited;
}
static void
init_randr_support (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
/* NB: This is also needed for XSettings, so don't remove. */
XSelectInput (GDK_SCREEN_XDISPLAY (screen),
x11_screen->xroot_window,
StructureNotifyMask);
#ifdef HAVE_RANDR
if (!GDK_X11_DISPLAY (gdk_screen_get_display (screen))->have_randr12)
return;
XRRSelectInput (GDK_SCREEN_XDISPLAY (screen),
x11_screen->xroot_window,
RRScreenChangeNotifyMask
| RRCrtcChangeNotifyMask
| RROutputPropertyNotifyMask);
#endif
}
static void
process_monitors_change (GdkScreen *screen)
{
if (init_multihead (screen))
{
update_bounding_box (screen);
g_signal_emit_by_name (screen, "monitors-changed");
}
}
void
_gdk_x11_screen_size_changed (GdkScreen *screen,
XEvent *event)
{
gint width, height;
#ifdef HAVE_RANDR
GdkX11Display *display_x11;
#endif
width = gdk_x11_screen_get_width (screen);
height = gdk_x11_screen_get_height (screen);
#ifdef HAVE_RANDR
display_x11 = GDK_X11_DISPLAY (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_x11_screen_get_width (screen) ||
height != gdk_x11_screen_get_height (screen))
g_signal_emit_by_name (screen, "size-changed");
}
void
_gdk_x11_screen_get_edge_monitors (GdkScreen *screen,
gint *top,
gint *bottom,
gint *left,
gint *right)
{
#ifdef HAVE_XFREE_XINERAMA
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
gint top_most_pos = x11_screen->height;
gint left_most_pos = x11_screen->width;
gint bottom_most_pos = 0;
gint right_most_pos = 0;
gint i;
XineramaScreenInfo *x_monitors;
int x_n_monitors;
#endif
*top = *bottom = *left = *right = -1;
#ifdef HAVE_XFREE_XINERAMA
if (!XineramaIsActive (x11_screen->xdisplay))
return;
x_monitors = XineramaQueryScreens (x11_screen->xdisplay, &x_n_monitors);
if (x_n_monitors <= 0 || x_monitors == NULL)
{
if (x_monitors)
XFree (x_monitors);
return;
}
for (i = 0; i < x_n_monitors; i++)
{
if (left && left_most_pos > x_monitors[i].x_org)
{
left_most_pos = x_monitors[i].x_org;
*left = i;
}
if (right && right_most_pos < x_monitors[i].x_org + x_monitors[i].width)
{
right_most_pos = x_monitors[i].x_org + x_monitors[i].width;
*right = i;
}
if (top && top_most_pos > x_monitors[i].y_org)
{
top_most_pos = x_monitors[i].y_org;
*top = i;
}
if (bottom && bottom_most_pos < x_monitors[i].y_org + x_monitors[i].height)
{
bottom_most_pos = x_monitors[i].y_org + x_monitors[i].height;
*bottom = i;
}
}
XFree (x_monitors);
#endif
}
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;
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
if (selection_event->selection == get_cm_atom (x11_screen))
{
gboolean composited = selection_event->owner != None;
if (composited != x11_screen->is_composited)
{
x11_screen->is_composited = composited;
g_signal_emit_by_name (screen, "composited-changed");
}
}
#endif
}
static gchar *
substitute_screen_number (const gchar *display_name,
gint screen_number)
{
GString *str;
gchar *p;
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);
}
static gchar *
gdk_x11_screen_make_display_name (GdkScreen *screen)
{
const gchar *old_display;
old_display = gdk_display_get_name (gdk_screen_get_display (screen));
return substitute_screen_number (old_display,
gdk_x11_screen_get_number (screen));
}
static GdkWindow *
gdk_x11_screen_get_active_window (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkWindow *ret = NULL;
Atom type_return;
gint format_return;
gulong nitems_return;
gulong bytes_after_return;
guchar *data = NULL;
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_ACTIVE_WINDOW")))
return NULL;
if (XGetWindowProperty (x11_screen->xdisplay, x11_screen->xroot_window,
gdk_x11_get_xatom_by_name_for_display (x11_screen->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))
{
Window window = *(Window *) data;
if (window != None)
{
ret = gdk_x11_window_foreign_new_for_display (x11_screen->display,
window);
}
}
}
if (data)
XFree (data);
return ret;
}
static GList *
gdk_x11_screen_get_window_stack (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GList *ret = NULL;
Atom type_return;
gint format_return;
gulong nitems_return;
gulong bytes_after_return;
guchar *data = NULL;
if (!gdk_x11_screen_supports_net_wm_hint (screen,
gdk_atom_intern_static_string ("_NET_CLIENT_LIST_STACKING")))
return NULL;
if (XGetWindowProperty (x11_screen->xdisplay, x11_screen->xroot_window,
gdk_x11_get_xatom_by_name_for_display (x11_screen->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_x11_window_foreign_new_for_display (x11_screen->display,
(Window)stack[i]);
if (win != NULL)
ret = g_list_append (ret, win);
}
}
}
if (data)
XFree (data);
return ret;
}
static gboolean
gdk_x11_screen_get_setting (GdkScreen *screen,
const gchar *name,
GValue *value)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
const GValue *setting;
if (x11_screen->xsettings == NULL)
goto out;
setting = g_hash_table_lookup (x11_screen->xsettings, name);
if (setting == NULL)
goto out;
if (!g_value_transform (setting, value))
{
g_warning ("Cannot transform xsetting %s of type %s to type %s\n",
name,
g_type_name (G_VALUE_TYPE (setting)),
g_type_name (G_VALUE_TYPE (value)));
goto out;
}
return TRUE;
out:
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 Window
get_net_supporting_wm_check (GdkX11Screen *screen,
Window window)
{
GdkDisplay *display;
Atom type;
gint format;
gulong n_items;
gulong bytes_after;
guchar *data;
Window value;
display = screen->display;
type = None;
data = NULL;
value = None;
gdk_x11_display_error_trap_push (display);
XGetWindowProperty (screen->xdisplay, 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);
gdk_x11_display_error_trap_pop_ignored (display);
if (type == XA_WINDOW)
value = *(Window *)data;
if (data)
XFree (data);
return value;
}
static void
fetch_net_wm_check_window (GdkScreen *screen)
{
GdkX11Screen *x11_screen;
GdkDisplay *display;
Window window;
GTimeVal tv;
gint error;
x11_screen = GDK_X11_SCREEN (screen);
display = x11_screen->display;
g_return_if_fail (GDK_X11_DISPLAY (display)->trusted_client);
if (x11_screen->wmspec_check_window != None)
return; /* already have it */
g_get_current_time (&tv);
if (ABS (tv.tv_sec - x11_screen->last_wmspec_check_time) < 15)
return; /* we've checked recently */
window = get_net_supporting_wm_check (x11_screen, x11_screen->xroot_window);
if (window == None)
return;
if (window != get_net_supporting_wm_check (x11_screen, window))
return;
gdk_x11_display_error_trap_push (display);
/* Find out if this WM goes away, so we can reset everything. */
XSelectInput (x11_screen->xdisplay, window, StructureNotifyMask);
error = gdk_x11_display_error_trap_pop (display);
if (!error)
{
/* We check the window property again because after XGetWindowProperty()
* and before XSelectInput() the window may have been recycled in such a
* way that XSelectInput() doesn't fail but the window is no longer what
* we want.
*/
if (window != get_net_supporting_wm_check (x11_screen, window))
return;
x11_screen->wmspec_check_window = window;
x11_screen->last_wmspec_check_time = tv.tv_sec;
x11_screen->need_refetch_net_supported = TRUE;
x11_screen->need_refetch_wm_name = TRUE;
/* Careful, reentrancy */
_gdk_x11_screen_window_manager_changed (screen);
}
}
/**
* gdk_x11_screen_supports_net_wm_hint:
* @screen: (type GdkX11Screen): 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](http://www.freedesktop.org/Standards/wm-spec) specification.
*
* 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.
*
* Returns: %TRUE if the window manager supports @property
*
* Since: 2.2
**/
gboolean
gdk_x11_screen_supports_net_wm_hint (GdkScreen *screen,
GdkAtom property)
{
gulong i;
GdkX11Screen *x11_screen;
NetWmSupportedAtoms *supported_atoms;
GdkDisplay *display;
Atom atom;
g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
x11_screen = GDK_X11_SCREEN (screen);
display = x11_screen->display;
if (!G_LIKELY (GDK_X11_DISPLAY (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 (x11_screen->wmspec_check_window == None)
return FALSE;
if (x11_screen->need_refetch_net_supported)
{
/* WM has changed since we last got the supported list,
* refetch it.
*/
Atom type;
gint format;
gulong bytes_after;
x11_screen->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), x11_screen->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;
atom = gdk_x11_atom_to_xatom_for_display (display, property);
for (i = 0; i < supported_atoms->n_atoms; i++)
{
if (supported_atoms->atoms[i] == atom)
return TRUE;
}
return FALSE;
}
/**
* gdk_x11_screen_get_window_manager_name:
* @screen: (type GdkX11Screen): a #GdkScreen
*
* Returns the name of the window manager for @screen.
*
* Returns: 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)
{
GdkX11Screen *x11_screen;
GdkDisplay *display;
x11_screen = GDK_X11_SCREEN (screen);
display = x11_screen->display;
if (!G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
return x11_screen->window_manager_name;
fetch_net_wm_check_window (screen);
if (x11_screen->need_refetch_wm_name)
{
/* Get the name of the window manager */
x11_screen->need_refetch_wm_name = FALSE;
g_free (x11_screen->window_manager_name);
x11_screen->window_manager_name = g_strdup ("unknown");
if (x11_screen->wmspec_check_window != None)
{
Atom type;
gint format;
gulong n_items;
gulong bytes_after;
gchar *name;
name = NULL;
gdk_x11_display_error_trap_push (display);
XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
x11_screen->wmspec_check_window,
gdk_x11_get_xatom_by_name_for_display (display,
"_NET_WM_NAME"),
0, G_MAXLONG, False,
gdk_x11_get_xatom_by_name_for_display (display,
"UTF8_STRING"),
&type, &format,
&n_items, &bytes_after,
(guchar **)&name);
gdk_x11_display_error_trap_pop_ignored (display);
if (name != NULL)
{
g_free (x11_screen->window_manager_name);
x11_screen->window_manager_name = g_strdup (name);
XFree (name);
}
}
}
return GDK_X11_SCREEN (screen)->window_manager_name;
}
static void
gdk_x11_screen_class_init (GdkX11ScreenClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkScreenClass *screen_class = GDK_SCREEN_CLASS (klass);
object_class->dispose = gdk_x11_screen_dispose;
object_class->finalize = gdk_x11_screen_finalize;
screen_class->get_display = gdk_x11_screen_get_display;
screen_class->get_width = gdk_x11_screen_get_width;
screen_class->get_height = gdk_x11_screen_get_height;
screen_class->get_width_mm = gdk_x11_screen_get_width_mm;
screen_class->get_height_mm = gdk_x11_screen_get_height_mm;
screen_class->get_number = gdk_x11_screen_get_number;
screen_class->get_root_window = gdk_x11_screen_get_root_window;
screen_class->get_system_visual = _gdk_x11_screen_get_system_visual;
screen_class->get_rgba_visual = gdk_x11_screen_get_rgba_visual;
screen_class->is_composited = gdk_x11_screen_is_composited;
screen_class->make_display_name = gdk_x11_screen_make_display_name;
screen_class->get_active_window = gdk_x11_screen_get_active_window;
screen_class->get_window_stack = gdk_x11_screen_get_window_stack;
screen_class->get_setting = gdk_x11_screen_get_setting;
screen_class->visual_get_best_depth = _gdk_x11_screen_visual_get_best_depth;
screen_class->visual_get_best_type = _gdk_x11_screen_visual_get_best_type;
screen_class->visual_get_best = _gdk_x11_screen_visual_get_best;
screen_class->visual_get_best_with_depth = _gdk_x11_screen_visual_get_best_with_depth;
screen_class->visual_get_best_with_type = _gdk_x11_screen_visual_get_best_with_type;
screen_class->visual_get_best_with_both = _gdk_x11_screen_visual_get_best_with_both;
screen_class->query_depths = _gdk_x11_screen_query_depths;
screen_class->query_visual_types = _gdk_x11_screen_query_visual_types;
screen_class->list_visuals = _gdk_x11_screen_list_visuals;
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 (GdkX11ScreenClass, window_manager_changed),
NULL, NULL,
NULL,
G_TYPE_NONE,
0);
}
static guint32
get_netwm_cardinal_property (GdkScreen *screen,
const gchar *name)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkAtom atom;
guint32 prop = 0;
Atom type;
gint format;
gulong nitems;
gulong bytes_after;
guchar *data;
atom = gdk_atom_intern_static_string (name);
if (!gdk_x11_screen_supports_net_wm_hint (screen, atom))
return 0;
XGetWindowProperty (x11_screen->xdisplay,
x11_screen->xroot_window,
gdk_x11_get_xatom_by_name_for_display (GDK_SCREEN_DISPLAY (screen), name),
0, G_MAXLONG,
False, XA_CARDINAL, &type, &format, &nitems,
&bytes_after, &data);
if (type == XA_CARDINAL)
{
prop = *(gulong *)data;
XFree (data);
}
return prop;
}
/**
* gdk_x11_screen_get_number_of_desktops:
* @screen: (type GdkX11Screen): a #GdkScreen
*
* Returns the number of workspaces for @screen when running under a
* window manager that supports multiple workspaces, as described
* in the
* [Extended Window Manager Hints](http://www.freedesktop.org/Standards/wm-spec) specification.
*
* Returns: the number of workspaces, or 0 if workspaces are not supported
*
* Since: 3.10
*/
guint32
gdk_x11_screen_get_number_of_desktops (GdkScreen *screen)
{
return get_netwm_cardinal_property (screen, "_NET_NUMBER_OF_DESKTOPS");
}
/**
* gdk_x11_screen_get_current_desktop:
* @screen: (type GdkX11Screen): a #GdkScreen
*
* Returns the current workspace for @screen when running under a
* window manager that supports multiple workspaces, as described
* in the
* [Extended Window Manager Hints](http://www.freedesktop.org/Standards/wm-spec) specification.
*
* Returns: the current workspace, or 0 if workspaces are not supported
*
* Since: 3.10
*/
guint32
gdk_x11_screen_get_current_desktop (GdkScreen *screen)
{
return get_netwm_cardinal_property (screen, "_NET_CURRENT_DESKTOP");
}
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