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gtk2/gdk/x11/gdkscreen-x11.c
Benjamin Otte 359bc7695c build: Reintroduce warning flags from autotools 
Some of the flags got lost in the meson transition or were demoted from
error flags to warning flags.
This commit reintroduces them.

It also includes fixes for the code that had warnings with those flags.
The big one being -Wshadow.
2019-01-22 04:33:12 +01:00

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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);
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);
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->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;
/* Visual Part */
for (i = 0; i < x11_screen->nvisuals; i++)
g_object_unref (x11_screen->visuals[i]);
g_free (x11_screen->visuals);
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,
gint monitor_num)
{
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
GdkX11Monitor *monitor;
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 (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;
}
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 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 (GdkX11Screen *x11_screen, gboolean *changed)
{
#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;
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;
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 = 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);
}
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;
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->surface_scale);
gdk_monitor_set_model (GDK_MONITOR (monitor), name);
g_free (name);
if (rr_monitors[i].primary)
primary_output = monitor->output;
XRRFreeOutputInfo (output_info);
}
XRRFreeMonitors (rr_monitors);
XRRFreeScreenResources (resources);
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 (GdkX11Screen *x11_screen, gboolean *changed)
{
#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;
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);
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->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;
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->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 = 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 (GdkX11Screen *x11_screen, gboolean *changed)
{
GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
GdkX11Monitor *monitor;
GdkRectangle geometry;
int width_mm, height_mm;
int width, height;
int i;
for (i = 0; i < x11_display->monitors->len; i++)
{
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);
}
width_mm = WidthMMOfScreen (x11_screen->xscreen);
height_mm = HeightMMOfScreen (x11_screen->xscreen);
width = WidthOfScreen (x11_screen->xscreen);
height = HeightOfScreen (x11_screen->xscreen);
gdk_monitor_get_geometry (GDK_MONITOR (monitor), &geometry);
if (0 != geometry.x ||
0 != geometry.y ||
width != geometry.width ||
height != geometry.height ||
width_mm != gdk_monitor_get_width_mm (GDK_MONITOR (monitor)) ||
height_mm != gdk_monitor_get_height_mm (GDK_MONITOR (monitor)))
*changed = TRUE;
gdk_monitor_set_position (GDK_MONITOR (monitor), 0, 0);
gdk_monitor_set_size (GDK_MONITOR (monitor), width, height);
g_object_notify (G_OBJECT (monitor), "workarea");
gdk_monitor_set_physical_size (GDK_MONITOR (monitor), width_mm, height_mm);
gdk_monitor_set_scale_factor (GDK_MONITOR (monitor), x11_screen->surface_scale);
if (x11_display->primary_monitor != 0)
*changed = TRUE;
x11_display->primary_monitor = 0;
for (i = x11_display->monitors->len - 1; i >= 0; i--)
{
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 (GdkX11Screen *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;
}
GdkX11Screen *
_gdk_x11_screen_new (GdkDisplay *display,
gint screen_number,
gboolean setup_display)
{
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);
_gdk_x11_screen_init_visuals (x11_screen, setup_display);
return x11_screen;
}
void
_gdk_x11_screen_set_surface_scale (GdkX11Screen *x11_screen,
gint 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 < x11_display->monitors->len; i++)
{
GdkMonitor *monitor = GDK_MONITOR (x11_display->monitors->pdata[i]);
gdk_monitor_set_scale_factor (monitor, scale);
}
}
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,
gint *top,
gint *bottom,
gint *left,
gint *right)
{
#ifdef HAVE_XFREE_XINERAMA
gint top_most_pos = HeightOfScreen (x11_screen->xscreen);
gint left_most_pos = WidthOfScreen (x11_screen->xscreen);
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 (GdkX11Screen *screen)
{
g_signal_emit (screen, signals[WINDOW_MANAGER_CHANGED], 0);
}
gboolean
gdk_x11_screen_get_setting (GdkX11Screen *x11_screen,
const gchar *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;
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 (GdkX11Screen *x11_screen)
{
GdkDisplay *display;
Window window;
GTimeVal tv;
gint 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 */
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 (x11_screen);
}
}
/**
* gdk_x11_screen_supports_net_wm_hint:
* @screen: the relevant #GdkX11Screen.
* @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 #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,
GdkAtom property)
{
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;
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: 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;
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 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,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
}
static guint32
get_netwm_cardinal_property (GdkX11Screen *x11_screen,
const gchar *name)
{
GdkAtom atom;
guint32 prop = 0;
Atom type;
gint format;
gulong nitems;
gulong bytes_after;
guchar *data;
atom = g_intern_static_string (name);
if (!gdk_x11_screen_supports_net_wm_hint (x11_screen, atom))
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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