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gtk/gdk/x11/gdkscreen-x11.c
Marco Trevisan (Treviño) f2a2889153 x11: Trap XRandr errors when getting outputs during init and update 
We may try to update the XRR outputs and Crtcs when they're changing in
the server, and so we may get BadRROutput that we're currently not
handling properly.

As per this, use traps and check whether we got errors, and if we did
let's ignore the current output.

It's not required to call init_randr13() again because if we got errors
it's very likely that there's a change coming that will be notified at
next iteration during which we'll repeat the init actions.
2023-06-02 00:30:14 +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;
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->connection == RR_Disconnected)
{
XRRFreeOutputInfo (output_info);
continue;
}
if (output_info->crtc)
{
GdkX11Monitor *monitor;
XRRCrtcInfo *crtc;
char *name;
GdkRectangle geometry;
GdkRectangle newgeo;
int j;
int refresh_rate = 0;
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;
}
}
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;
gdk_x11_display_error_trap_push (display);
primary_output = XRRGetOutputPrimary (x11_screen->xdisplay,
x11_screen->xroot_window);
gdk_x11_display_error_trap_pop_ignored (display);
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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