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gtk/gdk/x11/gdkscreen-x11.c
Jonas Ådahl f1551a87f6 x11: Trap errors happening when getting output properties 
This is to avoid getting X11 errors (thus aborting/exiting with a
failure) during rapid hotplugs, which may happen during e.g. CI testing.
2022-05-02 17:28:36 +02:00

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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 (GdkX11Screen *screen);
static void process_monitors_change (GdkX11Screen *screen);
enum
{
WINDOW_MANAGER_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkX11Screen, gdk_x11_screen, G_TYPE_OBJECT)
typedef struct _NetWmSupportedAtoms NetWmSupportedAtoms;
struct _NetWmSupportedAtoms
{
Atom *atoms;
gulong n_atoms;
};
static void
gdk_x11_screen_init (GdkX11Screen *screen)
{
}
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);
G_OBJECT_CLASS (gdk_x11_screen_parent_class)->dispose (object);
x11_screen->xdisplay = NULL;
x11_screen->xscreen = NULL;
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);
g_free (x11_screen->window_manager_name);
G_OBJECT_CLASS (gdk_x11_screen_parent_class)->finalize (object);
}
/**
* gdk_x11_screen_get_monitor_output:
* @screen: a `GdkX11Screen`
* @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
*/
XID
gdk_x11_screen_get_monitor_output (GdkX11Screen *x11_screen,
int monitor_num)
{
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
GdkX11Monitor *monitor;
XID output;
g_return_val_if_fail (monitor_num >= 0, None);
g_return_val_if_fail (monitor_num < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)), None);
monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), monitor_num);
output = monitor->output;
g_object_unref (monitor);
return output;
}
static int
get_current_desktop (GdkX11Screen *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,
g_intern_static_string ("_NET_CURRENT_DESKTOP")))
return workspace;
display = GDK_DISPLAY_XDISPLAY (GDK_SCREEN_DISPLAY (screen));
win = XRootWindow (display, gdk_x11_screen_get_screen_number (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;
}
gboolean
_gdk_x11_screen_get_monitor_work_area (GdkX11Screen *x11_screen,
GdkMonitor *monitor,
GdkRectangle *area)
{
Display *xdisplay;
Atom net_workareas;
int current_desktop;
char *workareas_dn_name;
Atom workareas_dn;
int screen_number;
Window xroot;
int result;
Atom type;
int format;
gulong num;
gulong leftovers;
guchar *ret_workarea;
long *workareas;
GdkRectangle geometry;
int i;
if (!gdk_x11_screen_supports_net_wm_hint (x11_screen,
g_intern_static_string ("_GTK_WORKAREAS")))
return FALSE;
xdisplay = gdk_x11_display_get_xdisplay (x11_screen->display);
net_workareas = XInternAtom (xdisplay, "_GTK_WORKAREAS", False);
if (net_workareas == None)
return FALSE;
current_desktop = get_current_desktop (x11_screen);
workareas_dn_name = g_strdup_printf ("_GTK_WORKAREAS_D%d", current_desktop);
workareas_dn = XInternAtom (xdisplay, workareas_dn_name, True);
g_free (workareas_dn_name);
if (workareas_dn == None)
return FALSE;
screen_number = gdk_x11_screen_get_screen_number (x11_screen);
xroot = XRootWindow (xdisplay, screen_number);
gdk_x11_display_error_trap_push (x11_screen->display);
ret_workarea = NULL;
result = XGetWindowProperty (xdisplay,
xroot,
workareas_dn,
0,
G_MAXLONG,
False,
AnyPropertyType,
&type,
&format,
&num,
&leftovers,
&ret_workarea);
gdk_x11_display_error_trap_pop_ignored (x11_screen->display);
if (result != Success ||
type == None ||
format == 0 ||
leftovers ||
num % 4 != 0)
{
XFree (ret_workarea);
return FALSE;
}
workareas = (long *) ret_workarea;
gdk_monitor_get_geometry (monitor, &geometry);
*area = geometry;
for (i = 0; i < num / 4; i++)
{
GdkRectangle work_area;
work_area = (GdkRectangle) {
.x = workareas[0] / x11_screen->surface_scale,
.y = workareas[1] / x11_screen->surface_scale,
.width = workareas[2] / x11_screen->surface_scale,
.height = workareas[3] / x11_screen->surface_scale,
};
if (gdk_rectangle_intersect (area, &work_area, &work_area))
*area = work_area;
workareas += 4;
}
XFree (ret_workarea);
return TRUE;
}
void
gdk_x11_screen_get_work_area (GdkX11Screen *x11_screen,
GdkRectangle *area)
{
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 desktop;
Display *display;
display = GDK_SCREEN_XDISPLAY (x11_screen);
workarea = XInternAtom (display, "_NET_WORKAREA", True);
/* Defaults in case of error */
area->x = 0;
area->y = 0;
area->width = WidthOfScreen (x11_screen->xscreen);
area->height = HeightOfScreen (x11_screen->xscreen);
if (!gdk_x11_screen_supports_net_wm_hint (x11_screen,
g_intern_static_string ("_NET_WORKAREA")))
return;
if (workarea == None)
return;
win = XRootWindow (display, gdk_x11_screen_get_screen_number (x11_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 (x11_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->surface_scale;
area->y /= x11_screen->surface_scale;
area->width /= x11_screen->surface_scale;
area->height /= x11_screen->surface_scale;
out:
if (ret_workarea)
XFree (ret_workarea);
}
/**
* gdk_x11_screen_get_xscreen:
* @screen: a `GdkX11Screen`
*
* Returns the screen of a `GdkX11Screen`.
*
* Returns: (transfer none): an Xlib Screen*
*/
Screen *
gdk_x11_screen_get_xscreen (GdkX11Screen *screen)
{
return screen->xscreen;
}
/**
* gdk_x11_screen_get_screen_number:
* @screen: a `GdkX11Screen`
*
* Returns the index of a `GdkX11Screen`.
*
* Returns: the position of @screen among the screens
* of its display
*/
int
gdk_x11_screen_get_screen_number (GdkX11Screen *screen)
{
return screen->screen_num;
}
static void
notify_surface_monitor_change (GdkX11Display *display,
GdkMonitor *monitor)
{
GHashTableIter iter;
GdkSurface *surface;
/* We iterate the surfaces via the hash table here because it's the only
* thing that contains all the surfaces.
*/
if (display->xid_ht == NULL)
return;
g_hash_table_iter_init (&iter, display->xid_ht);
while (g_hash_table_iter_next (&iter, NULL, (gpointer *)&surface))
{
gdk_x11_surface_check_monitor (surface, monitor);
}
}
static GdkX11Monitor *
find_monitor_by_output (GdkX11Display *x11_display, XID output)
{
int i;
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
g_object_unref (monitor);
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 (GdkX11Screen *x11_screen)
{
#ifdef HAVE_RANDR15
GdkDisplay *display = GDK_SCREEN_DISPLAY (x11_screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (display);
XRRScreenResources *resources;
RROutput primary_output = None;
RROutput first_output = None;
int i;
XRRMonitorInfo *rr_monitors;
int num_rr_monitors;
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 < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
monitor->add = FALSE;
monitor->remove = TRUE;
g_object_unref (monitor);
}
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;
if (output_info->connection == RR_Disconnected)
{
XRRFreeOutputInfo (output_info);
continue;
}
if (first_output == None)
first_output = output;
if (output_info->crtc)
{
XRRCrtcInfo *crtc;
int j;
gdk_x11_display_error_trap_push (display);
crtc = XRRGetCrtcInfo (x11_screen->xdisplay, resources,
output_info->crtc);
if (gdk_x11_display_error_trap_pop (display))
{
XRRFreeOutputInfo (output_info);
continue;
}
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);
}
/* 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);
gdk_x11_display_error_trap_push (display);
XRRGetOutputProperty (disp, output,
edid_atom,
0,
EDID_LENGTH,
FALSE,
FALSE,
AnyPropertyType,
&actual_type,
&actual_format,
&nbytes,
&bytes_left,
&prop);
if (gdk_x11_display_error_trap_pop (display))
{
XRRFreeOutputInfo (output_info);
continue;
}
// 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
}
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_list_store_append (x11_display->monitors, monitor);
}
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->surface_scale;
newgeo.y = rr_monitors[i].y / x11_screen->surface_scale;
newgeo.width = rr_monitors[i].width / x11_screen->surface_scale;
newgeo.height = rr_monitors[i].height / x11_screen->surface_scale;
gdk_monitor_set_geometry (GDK_MONITOR (monitor), &newgeo);
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->surface_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);
for (i = g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)) - 1; i >= 0; i--)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
notify_surface_monitor_change (x11_display, GDK_MONITOR (monitor));
if (monitor->remove)
{
g_list_store_remove (x11_display->monitors, i);
gdk_monitor_invalidate (GDK_MONITOR (monitor));
}
g_object_unref (monitor);
}
x11_display->primary_monitor = 0;
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
g_object_unref (monitor);
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;
}
return g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)) > 0;
#endif
return FALSE;
}
static gboolean
init_randr13 (GdkX11Screen *x11_screen)
{
#ifdef HAVE_RANDR
GdkDisplay *display = GDK_SCREEN_DISPLAY (x11_screen);
GdkX11Display *x11_display = GDK_X11_DISPLAY (display);
XRRScreenResources *resources;
RROutput primary_output = None;
RROutput first_output = None;
int i;
if (!x11_display->have_randr13)
return FALSE;
resources = XRRGetScreenResourcesCurrent (x11_screen->xdisplay,
x11_screen->xroot_window);
if (!resources)
return FALSE;
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
monitor->add = FALSE;
monitor->remove = TRUE;
g_object_unref (monitor);
}
for (i = 0; i < resources->noutput; ++i)
{
RROutput output = resources->outputs[i];
XRROutputInfo *output_info =
XRRGetOutputInfo (x11_screen->xdisplay, resources, output);
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_list_store_append (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->surface_scale;
newgeo.y = crtc->y / x11_screen->surface_scale;
newgeo.width = crtc->width / x11_screen->surface_scale;
newgeo.height = crtc->height / x11_screen->surface_scale;
gdk_monitor_set_geometry (GDK_MONITOR (monitor), &newgeo);
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->surface_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);
/* Which usable multihead data is not returned in non RandR 1.2+ X driver? */
for (i = g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)) - 1; i >= 0; i--)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
notify_surface_monitor_change (x11_display, GDK_MONITOR (monitor));
if (monitor->remove)
{
g_list_store_remove (x11_display->monitors, i);
gdk_monitor_invalidate (GDK_MONITOR (monitor));
}
g_object_unref (monitor);
}
x11_display->primary_monitor = 0;
primary_output = XRRGetOutputPrimary (x11_screen->xdisplay,
x11_screen->xroot_window);
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
GdkX11Monitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
g_object_unref (monitor);
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;
}
return g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)) > 0;
#endif
return FALSE;
}
static void
init_no_multihead (GdkX11Screen *x11_screen)
{
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
GdkX11Monitor *monitor;
int width_mm, height_mm;
int width, height;
int i;
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
monitor->add = FALSE;
monitor->remove = TRUE;
g_object_unref (monitor);
}
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_list_store_append (x11_display->monitors, monitor);
}
width_mm = WidthMMOfScreen (x11_screen->xscreen);
height_mm = HeightMMOfScreen (x11_screen->xscreen);
width = WidthOfScreen (x11_screen->xscreen);
height = HeightOfScreen (x11_screen->xscreen);
gdk_monitor_set_geometry (GDK_MONITOR (monitor), &(GdkRectangle) { 0, 0, width, height });
gdk_monitor_set_physical_size (GDK_MONITOR (monitor), width_mm, height_mm);
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), x11_screen->surface_scale);
x11_display->primary_monitor = 0;
for (i = g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)) - 1; i >= 0; i--)
{
monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
notify_surface_monitor_change (x11_display, GDK_MONITOR (monitor));
if (monitor->remove)
{
g_list_store_remove (x11_display->monitors, i);
gdk_monitor_invalidate (GDK_MONITOR (monitor));
}
g_object_unref (monitor);
}
}
static void
init_multihead (GdkX11Screen *screen)
{
if (!init_randr15 (screen) &&
!init_randr13 (screen))
init_no_multihead (screen);
}
GdkX11Screen *
_gdk_x11_screen_new (GdkDisplay *display,
int screen_number)
{
GdkX11Screen *x11_screen;
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
const char *scale_str;
x11_screen = g_object_new (GDK_TYPE_X11_SCREEN, NULL);
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_surface_scale = TRUE;
x11_screen->surface_scale = atol (scale_str);
if (x11_screen->surface_scale <= 0)
x11_screen->surface_scale = 1;
}
else
x11_screen->surface_scale = 1;
init_randr_support (x11_screen);
init_multihead (x11_screen);
return x11_screen;
}
void
_gdk_x11_screen_set_surface_scale (GdkX11Screen *x11_screen,
int scale)
{
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
GList *toplevels, *l;
int i;
if (x11_screen->surface_scale == scale)
return;
x11_screen->surface_scale = scale;
toplevels = gdk_x11_display_get_toplevel_windows (x11_screen->display);
for (l = toplevels; l != NULL; l = l->next)
{
GdkSurface *surface = l->data;
_gdk_x11_surface_set_surface_scale (surface, scale);
}
for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (x11_display->monitors)); i++)
{
GdkMonitor *monitor = g_list_model_get_item (G_LIST_MODEL (x11_display->monitors), i);
gdk_monitor_set_scale_factor (monitor, scale);
g_object_unref (monitor);
}
/* We re-read the monitor sizes so we can apply the new scale */
process_monitors_change (x11_screen);
}
static void
init_randr_support (GdkX11Screen *x11_screen)
{
/* NB: This is also needed for XSettings, so don't remove. */
XSelectInput (GDK_SCREEN_XDISPLAY (x11_screen),
x11_screen->xroot_window,
StructureNotifyMask);
#ifdef HAVE_RANDR
if (!GDK_X11_DISPLAY (GDK_SCREEN_DISPLAY (x11_screen))->have_randr12)
return;
XRRSelectInput (GDK_SCREEN_XDISPLAY (x11_screen),
x11_screen->xroot_window,
RRScreenChangeNotifyMask
| RRCrtcChangeNotifyMask
| RROutputPropertyNotifyMask);
#endif
}
static void
process_monitors_change (GdkX11Screen *screen)
{
init_multihead (screen);
}
void
_gdk_x11_screen_size_changed (GdkX11Screen *screen,
const XEvent *event)
{
#ifdef HAVE_RANDR
GdkX11Display *display_x11;
display_x11 = GDK_X11_DISPLAY (GDK_SCREEN_DISPLAY (screen));
if (display_x11->have_randr13 && event->type == ConfigureNotify)
return;
XRRUpdateConfiguration ((XEvent *) event);
#else
if (event->type != ConfigureNotify)
return;
#endif
process_monitors_change (screen);
}
void
_gdk_x11_screen_get_edge_monitors (GdkX11Screen *x11_screen,
int *top,
int *bottom,
int *left,
int *right)
{
#ifdef HAVE_XFREE_XINERAMA
int top_most_pos = HeightOfScreen (x11_screen->xscreen);
int left_most_pos = WidthOfScreen (x11_screen->xscreen);
int bottom_most_pos = 0;
int right_most_pos = 0;
int 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 (GdkX11Screen *screen)
{
g_signal_emit (screen, signals[WINDOW_MANAGER_CHANGED], 0);
}
gboolean
gdk_x11_screen_get_setting (GdkX11Screen *x11_screen,
const char *name,
GValue *value)
{
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_screen_get_xft_setting (x11_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;
int 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 (GdkX11Screen *x11_screen)
{
GdkDisplay *display;
Window window;
guint64 now;
int error;
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 */
now = g_get_monotonic_time ();
if ((now - x11_screen->last_wmspec_check_time) / 1e6 < 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 = now;
x11_screen->need_refetch_net_supported = TRUE;
x11_screen->need_refetch_wm_name = TRUE;
/* Careful, reentrancy */
_gdk_x11_screen_window_manager_changed (x11_screen);
}
}
/**
* gdk_x11_screen_supports_net_wm_hint:
* @screen: the relevant `GdkX11Screen`.
* @property_name: name of the WM property
*
* 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 `GdkX11Screen` to detect
* a window manager change.
*
* Returns: %TRUE if the window manager supports @property
**/
gboolean
gdk_x11_screen_supports_net_wm_hint (GdkX11Screen *x11_screen,
const char *property_name)
{
gulong i;
NetWmSupportedAtoms *supported_atoms;
GdkDisplay *display;
Atom atom;
display = x11_screen->display;
if (!G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
return FALSE;
supported_atoms = g_object_get_data (G_OBJECT (x11_screen), "gdk-net-wm-supported-atoms");
if (!supported_atoms)
{
supported_atoms = g_new0 (NetWmSupportedAtoms, 1);
g_object_set_data_full (G_OBJECT (x11_screen), "gdk-net-wm-supported-atoms", supported_atoms, cleanup_atoms);
}
fetch_net_wm_check_window (x11_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;
int 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_get_xatom_by_name_for_display (display, property_name);
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: a `GdkX11Screen`
*
* 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.
**/
const char*
gdk_x11_screen_get_window_manager_name (GdkX11Screen *x11_screen)
{
GdkDisplay *display;
display = x11_screen->display;
if (!G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
return x11_screen->window_manager_name;
fetch_net_wm_check_window (x11_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;
int format;
gulong n_items;
gulong bytes_after;
char *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 x11_screen->window_manager_name;
}
static void
gdk_x11_screen_class_init (GdkX11ScreenClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gdk_x11_screen_dispose;
object_class->finalize = gdk_x11_screen_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 (GdkX11ScreenClass, window_manager_changed),
NULL, NULL,
NULL,
G_TYPE_NONE,
0);
}
static guint32
get_netwm_cardinal_property (GdkX11Screen *x11_screen,
const char *name)
{
guint32 prop = 0;
Atom type;
int format;
gulong nitems;
gulong bytes_after;
guchar *data;
if (!gdk_x11_screen_supports_net_wm_hint (x11_screen, name))
return 0;
XGetWindowProperty (x11_screen->xdisplay,
x11_screen->xroot_window,
gdk_x11_get_xatom_by_name_for_display (GDK_SCREEN_DISPLAY (x11_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: a `GdkX11Screen`
*
* 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
*/
guint32
gdk_x11_screen_get_number_of_desktops (GdkX11Screen *screen)
{
return get_netwm_cardinal_property (screen, "_NET_NUMBER_OF_DESKTOPS");
}
/**
* gdk_x11_screen_get_current_desktop:
* @screen: a `GdkX11Screen`
*
* 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
*/
guint32
gdk_x11_screen_get_current_desktop (GdkX11Screen *screen)
{
return get_netwm_cardinal_property (screen, "_NET_CURRENT_DESKTOP");
}
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