Learning_GTK4_tree/gdk/x11/gdkmonitor-x11.c

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2023-12-12 11:36:42 +01:00
/*
* Copyright © 2016 Red Hat, Inc
*
* 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 <glib.h>
#include <gio/gio.h>
#include "gdkmonitor-x11.h"
#include "gdkx11display.h"
#include "gdkdisplay-x11.h"
#include "gdkscreen-x11.h"
#include "gdkdisplayprivate.h"
#include "gdkprivate-x11.h"
G_DEFINE_TYPE (GdkX11Monitor, gdk_x11_monitor, GDK_TYPE_MONITOR)
static gboolean
gdk_monitor_has_fullscreen_window (GdkMonitor *monitor)
{
GList *toplevels, *l;
GdkSurface *surface;
gboolean has_fullscreen;
toplevels = gdk_x11_display_get_toplevel_windows (monitor->display);
has_fullscreen = FALSE;
for (l = toplevels; l; l = l->next)
{
surface = l->data;
if (!GDK_IS_TOPLEVEL (surface))
continue;
if ((gdk_toplevel_get_state (GDK_TOPLEVEL (surface)) & GDK_TOPLEVEL_STATE_FULLSCREEN) == 0)
continue;
if (surface->fullscreen_mode == GDK_FULLSCREEN_ON_ALL_MONITORS ||
gdk_display_get_monitor_at_surface (monitor->display, surface) == monitor)
{
has_fullscreen = TRUE;
break;
}
}
return has_fullscreen;
}
/**
* gdk_x11_monitor_get_workarea:
* @monitor: (type GdkX11Monitor): a `GdkMonitor`
* @workarea: (out): a `GdkRectangle` to be filled with the monitor workarea
*
* Retrieves the size and position of the work area on a monitor
* within the display coordinate space.
*
* The returned geometry is in application pixels, not in device pixels
* (see [method@Gdk.Monitor.get_scale_factor]).
*/
void
gdk_x11_monitor_get_workarea (GdkMonitor *monitor,
GdkRectangle *dest)
{
GdkX11Screen *screen = GDK_X11_DISPLAY (monitor->display)->screen;
GdkRectangle workarea;
gdk_monitor_get_geometry (monitor, dest);
if (_gdk_x11_screen_get_monitor_work_area (screen, monitor, &workarea))
{
if (!gdk_monitor_has_fullscreen_window (monitor))
*dest = workarea;
}
else
{
/* The EWMH constrains workarea to be a rectangle, so it
* can't adequately deal with L-shaped monitor arrangements.
* As a workaround, we ignore the workarea for anything
* but the primary monitor. Since that is where the 'desktop
* chrome' usually lives, this works ok in practice.
*/
if (monitor == gdk_x11_display_get_primary_monitor (monitor->display) &&
!gdk_monitor_has_fullscreen_window (monitor))
{
gdk_x11_screen_get_work_area (screen, &workarea);
if (gdk_rectangle_intersect (dest, &workarea, &workarea))
*dest = workarea;
}
}
}
static void
gdk_x11_monitor_init (GdkX11Monitor *monitor)
{
}
static void
gdk_x11_monitor_class_init (GdkX11MonitorClass *class)
{
}
/**
* gdk_x11_monitor_get_output:
* @monitor: (type GdkX11Monitor): a `GdkMonitor`
*
* Returns the XID of the Output corresponding to @monitor.
*
* Returns: the XID of @monitor
*/
XID
gdk_x11_monitor_get_output (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_X11_MONITOR (monitor), 0);
return GDK_X11_MONITOR (monitor)->output;
}