From edfe01bf99874e9a29664a297e2ad4645316f8c1 Mon Sep 17 00:00:00 2001 From: Christian Hergert Date: Fri, 17 Feb 2023 15:33:40 -0800 Subject: [PATCH] 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). --- lib/meson.build | 1 + lib/mks-inhibitor-private.h | 35 ++++++++ lib/mks-inhibitor.c | 157 ++++++++++++++++++++++++++++++++++++ 3 files changed, 193 insertions(+) create mode 100644 lib/mks-inhibitor-private.h create mode 100644 lib/mks-inhibitor.c diff --git a/lib/meson.build b/lib/meson.build index 3635ad3..cd36d67 100644 --- a/lib/meson.build +++ b/lib/meson.build @@ -29,6 +29,7 @@ libmks_private_sources = [ 'mks-display-picture.c', 'mks-css.c', 'mks-gl-context.c', + 'mks-inhibitor.c', 'mks-read-only-list-model.c', 'mks-util.c', diff --git a/lib/mks-inhibitor-private.h b/lib/mks-inhibitor-private.h new file mode 100644 index 0000000..d002e35 --- /dev/null +++ b/lib/mks-inhibitor-private.h @@ -0,0 +1,35 @@ +/* mks-inhibitor.h + * + * Copyright 2023 Christian Hergert + * + * 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 . + * + * SPDX-License-Identifier: GPL-3.0-or-later + */ + +#pragma once + +#include + +G_BEGIN_DECLS + +#define MKS_TYPE_INHIBITOR (mks_inhibitor_get_type()) + +G_DECLARE_FINAL_TYPE (MksInhibitor, mks_inhibitor, MKS, INHIBITOR, GObject) + +MksInhibitor *mks_inhibitor_new (GtkWidget *widget, + GdkEvent *event); +void mks_inhibitor_uninhibit (MksInhibitor *self); + +G_END_DECLS diff --git a/lib/mks-inhibitor.c b/lib/mks-inhibitor.c new file mode 100644 index 0000000..cf8708d --- /dev/null +++ b/lib/mks-inhibitor.c @@ -0,0 +1,157 @@ +/* mks-inhibitor.c + * + * Copyright 2023 Christian Hergert + * + * 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 . + * + * 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); +}