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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 <X11/Xatom.h>
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include "../global.h"
#include "topmenu-monitor.h"
struct _TopMenuMonitorPrivate
{
GdkAtom atom_selection;
GtkClipboard *selection;
GdkWindow *cur_server;
};
enum {
PROP_0,
PROP_AVAILABLE,
N_PROPERTIES
};
G_DEFINE_TYPE(TopMenuMonitor, topmenu_monitor, G_TYPE_OBJECT)
#define TOPMENU_MONITOR_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), TOPMENU_TYPE_MONITOR, TopMenuMonitorPrivate))
static GParamSpec *properties[N_PROPERTIES] = { NULL };
static void topmenu_monitor_update(TopMenuMonitor *self);
static void handle_clipboard_owner_change(GtkClipboard *clipboard, GdkEvent *event, TopMenuMonitor *self)
{
topmenu_monitor_update(self);
}
static GdkFilterReturn handle_cur_server_event(GdkXEvent *xevent, GdkEvent *event, gpointer data)
{
XEvent *e = (XEvent*)xevent;
if (e->type == DestroyNotify) {
TopMenuMonitor *self = TOPMENU_MONITOR(data);
if (self->priv->cur_server &&
GDK_WINDOW_XID(self->priv->cur_server) == e->xdestroywindow.window) {
g_debug("Current server has been destroyed");
topmenu_monitor_update(self);
}
}
return GDK_FILTER_CONTINUE;
}
static void topmenu_monitor_set_cur_server(TopMenuMonitor *self, GdkWindow *window)
{
if (self->priv->cur_server == window) {
// Nothing to do
return;
}
if (self->priv->cur_server) {
g_debug("Removing current server");
gdk_window_remove_filter(window, handle_cur_server_event, self);
g_object_unref(self->priv->cur_server);
self->priv->cur_server = 0;
}
if (window) {
g_debug("Setting current server to 0x%lx", GDK_WINDOW_XID(window));
gdk_window_set_events(window, gdk_window_get_events(window) | GDK_STRUCTURE_MASK);
gdk_window_add_filter(window, handle_cur_server_event, self);
self->priv->cur_server = window;
}
if (self->priv->cur_server && !self->available) {
// Signal availability
self->available = TRUE;
g_object_notify_by_pspec(G_OBJECT(self), properties[PROP_AVAILABLE]);
} else if (!self->priv->cur_server && self->available) {
// Signal no availability
self->available = FALSE;
g_object_notify_by_pspec(G_OBJECT(self), properties[PROP_AVAILABLE]);
}
}
static void topmenu_monitor_update(TopMenuMonitor *self)
{
GdkScreen *screen = gdk_screen_get_default();
GdkDisplay *display = gdk_screen_get_display(screen);
Display *xdpy = GDK_DISPLAY_XDISPLAY(display);
Atom atom = gdk_x11_atom_to_xatom_for_display(display, self->priv->atom_selection);
Window xwin = XGetSelectionOwner(xdpy, atom);
if (xwin) {
GdkWindow *window = gdk_x11_window_foreign_new_for_display(display, xwin);
topmenu_monitor_set_cur_server(self, window);
} else {
topmenu_monitor_set_cur_server(self, NULL);
}
}
static void topmenu_monitor_get_property(GObject *obj, guint property_id, GValue *value, GParamSpec *pspec)
{
TopMenuMonitor *self = TOPMENU_MONITOR(obj);
switch (property_id) {
case PROP_AVAILABLE:
g_value_set_boolean(value, self->available);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
}
}
static void topmenu_monitor_dispose(GObject *obj)
{
TopMenuMonitor *self = TOPMENU_MONITOR(obj);
if (self->priv->cur_server) {
gdk_window_remove_filter(self->priv->cur_server,
handle_cur_server_event, self);
g_object_unref(self->priv->cur_server);
self->priv->cur_server = 0;
}
self->priv->selection = NULL;
G_OBJECT_CLASS(topmenu_monitor_parent_class)->dispose(obj);
}
static void topmenu_monitor_class_init(TopMenuMonitorClass *klass)
{
GObjectClass *obj_class = G_OBJECT_CLASS(klass);
obj_class->get_property = topmenu_monitor_get_property;
obj_class->dispose = topmenu_monitor_dispose;
properties[PROP_AVAILABLE] = g_param_spec_boolean("available",
"TopMenu's availability",
"Set to TRUE whether a TopMenu server is currently available",
FALSE,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
g_object_class_install_properties(obj_class, N_PROPERTIES, properties);
g_type_class_add_private(klass, sizeof(TopMenuMonitorPrivate));
}
static void topmenu_monitor_init(TopMenuMonitor *self)
{
self->priv = TOPMENU_MONITOR_GET_PRIVATE(self);
self->available = FALSE;
self->priv->atom_selection = gdk_atom_intern_static_string(ATOM_TOPMENU_SERVER_SELECTION);
self->priv->selection = gtk_clipboard_get(self->priv->atom_selection);
self->priv->cur_server = NULL;
g_signal_connect_object(self->priv->selection, "owner-change",
G_CALLBACK(handle_clipboard_owner_change), self, 0);
topmenu_monitor_update(self);
}
TopMenuMonitor * topmenu_monitor_get_instance()
{
static TopMenuMonitor *instance = NULL;
if (!instance) {
instance = TOPMENU_MONITOR(g_object_new(TOPMENU_TYPE_MONITOR, NULL));
}
return instance;
}
gboolean topmenu_monitor_is_topmenu_available(TopMenuMonitor * self)
{
return self->available;
}
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