libmks/lib/mks-inhibitor.c
Christian Hergert edfe01bf99 lib: add inhibitor helper
This is an object which is meant to be acquired/released in response to
user input. Currently, it will inhibit the shortcuts in the display server
if possible.

Some additional things may be added eventually like relative pointers or
similar (by grabbing pointer input).
2023-02-17 15:33:40 -08:00

158 lines
4.1 KiB
C

/* mks-inhibitor.c
*
* Copyright 2023 Christian Hergert <chergert@redhat.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "config.h"
#include "mks-inhibitor-private.h"
struct _MksInhibitor
{
GObject parent_instance;
GdkToplevel *toplevel;
guint shortcuts_inhibited : 1;
};
G_DEFINE_FINAL_TYPE (MksInhibitor, mks_inhibitor, G_TYPE_OBJECT)
static void
notify_cb (GdkToplevel *toplevel,
GParamSpec *pspec,
gpointer user_data)
{
gboolean shortcuts_inhibited;
g_object_get (toplevel,
"shortcuts-inhibited", &shortcuts_inhibited,
NULL);
g_debug ("Toplevel %p shortcuts-inhibited: %s\n",
toplevel,
shortcuts_inhibited ? "YES" : "NO");
}
static void
inhibit_shortcuts (MksInhibitor *self,
GdkEvent *event)
{
guint count;
g_assert (MKS_IS_INHIBITOR (self));
g_assert (GDK_IS_EVENT (event));
g_assert (GDK_IS_TOPLEVEL (self->toplevel));
g_assert (self->shortcuts_inhibited == FALSE);
count = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (self->toplevel), "MKS_INHIBITOR_COUNT"));
count++;
g_object_set_data (G_OBJECT (self->toplevel), "MKS_INHIBITOR_COUNT", GUINT_TO_POINTER (count));
if (count == 1)
{
g_signal_connect (self->toplevel,
"notify::shortcuts-inhibited",
G_CALLBACK (notify_cb),
NULL);
gdk_toplevel_inhibit_system_shortcuts (self->toplevel, event);
notify_cb (self->toplevel, NULL, NULL);
}
self->shortcuts_inhibited = TRUE;
}
static void
uninhibit_shortcuts (MksInhibitor *self)
{
guint count;
g_assert (MKS_IS_INHIBITOR (self));
g_assert (GDK_IS_TOPLEVEL (self->toplevel));
g_assert (self->shortcuts_inhibited == TRUE);
count = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (self->toplevel), "MKS_INHIBITOR_COUNT"));
count--;
g_object_set_data (G_OBJECT (self->toplevel), "MKS_INHIBITOR_COUNT", GUINT_TO_POINTER (count));
if (count == 0)
{
g_signal_handlers_disconnect_by_func (self->toplevel,
G_CALLBACK (notify_cb),
NULL);
gdk_toplevel_restore_system_shortcuts (self->toplevel);
}
self->shortcuts_inhibited = FALSE;
}
static void
mks_inhibitor_dispose (GObject *object)
{
MksInhibitor *self = (MksInhibitor *)object;
if (self->shortcuts_inhibited)
uninhibit_shortcuts (self);
G_OBJECT_CLASS (mks_inhibitor_parent_class)->dispose (object);
}
static void
mks_inhibitor_class_init (MksInhibitorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = mks_inhibitor_dispose;
}
static void
mks_inhibitor_init (MksInhibitor *self)
{
}
MksInhibitor *
mks_inhibitor_new (GtkWidget *widget,
GdkEvent *event)
{
MksInhibitor *self;
GdkSurface *surface;
GtkNative *native;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
self = g_object_new (MKS_TYPE_INHIBITOR, NULL);
if ((native = gtk_widget_get_native (widget)) &&
(surface = gtk_native_get_surface (native)) &&
GDK_IS_TOPLEVEL (surface))
{
if (g_set_object (&self->toplevel, GDK_TOPLEVEL (surface)))
inhibit_shortcuts (self, event);
}
return self;
}
void
mks_inhibitor_uninhibit (MksInhibitor *self)
{
g_return_if_fail (MKS_IS_INHIBITOR (self));
if (self->shortcuts_inhibited)
uninhibit_shortcuts (self);
}