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/*
* Copyright 2014 Javier S. Pedro <maemo@javispedro.com>
*
* This file is part of TopMenu.
*
* TopMenu is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* TopMenu 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with TopMenu. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gtk/gtk.h>
#include "topmenu-server.h"
#include "../global.h"
static GdkAtom selection_atom = GDK_NONE;
static GtkClipboard *selection_clipboard = NULL;
static GList *server_widgets = NULL;
static void handle_selection_owner_change(GtkClipboard *clipboard, GdkEvent *event, gpointer user_data);
static void init_selection_monitor()
{
if (!selection_clipboard || selection_atom == GDK_NONE) {
selection_atom = gdk_atom_intern_static_string(ATOM_TOPMENU_SERVER_SELECTION);
selection_clipboard = gtk_clipboard_get(selection_atom);
// Used to monitor the current owner of the server selection
g_signal_connect(selection_clipboard, "owner-change",
G_CALLBACK(handle_selection_owner_change), NULL);
}
}
/** Returns the current stub this process wants to set as owner of the server_selection. */
static GdkWindow *get_front_server_stub()
{
if (server_widgets) {
GtkWidget *widget = server_widgets->data;
gpointer data = g_object_get_data(G_OBJECT(widget), OBJECT_DATA_KEY_SERVER_STUB);
g_return_val_if_fail(data, NULL);
return GDK_WINDOW(data);
} else {
return NULL;
}
}
static void update_selection_owner(guint32 time)
{
GdkWindow *our_owner = get_front_server_stub();
if (our_owner == NULL) return; // Nothing to do
GdkWindow *cur_owner = gdk_selection_owner_get(selection_atom);
if (cur_owner != our_owner) {
g_debug("Setting this process as owner of the selection");
int res = gdk_selection_owner_set(our_owner, selection_atom, time, TRUE);
g_debug("Result = %d", res);
}
}
static void handle_selection_owner_change(GtkClipboard *clipboard, GdkEvent *event, gpointer user_data)
{
update_selection_owner(event->selection.time);
}
void topmenu_server_register_server_widget(GtkWidget *widget)
{
GdkWindow *window = gtk_widget_get_window(widget);
g_return_if_fail(window);
init_selection_monitor();
g_return_if_fail(g_object_get_data(G_OBJECT(widget), OBJECT_DATA_KEY_SERVER_STUB) == NULL);
GdkWindowAttr stub_attr = { 0 };
stub_attr.wclass = GDK_INPUT_ONLY;
stub_attr.override_redirect = TRUE;
GdkWindow *stub = gdk_window_new(window, &stub_attr, GDK_WA_NOREDIR);
g_object_set_data_full(G_OBJECT(widget), OBJECT_DATA_KEY_SERVER_STUB, stub,
(GDestroyNotify) &gdk_window_destroy);
server_widgets = g_list_prepend(server_widgets, widget);
update_selection_owner(GDK_CURRENT_TIME);
}
void topmenu_server_unregister_server_widget(GtkWidget *widget)
{
g_return_if_fail(g_object_get_data(G_OBJECT(widget), OBJECT_DATA_KEY_SERVER_STUB) != NULL);
server_widgets = g_list_remove_all(server_widgets, widget);
gpointer data = g_object_steal_data(G_OBJECT(widget), OBJECT_DATA_KEY_SERVER_STUB);
GdkWindow *stub = GDK_WINDOW(data);
gdk_window_destroy(stub);
}
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