Desktop
/* $Id: close.c,v 1.2 2011/07/16 02:46:24 khorben Exp $ */
/* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Panel */
/* 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, version 3 of the License.
*
* 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/>. */
#include <sys/time.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <libintl.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include "Panel.h"
/* Close */
/* private */
/* types */
typedef struct _Close
{
PanelAppletHelper * helper;
GtkWidget * widget;
GdkDisplay * display;
GdkScreen * screen;
GdkWindow * root;
Atom atom_active;
Atom atom_close;
Window window;
Window panel;
} Close;
/* prototypes */
/* close */
static GtkWidget * _close_init(PanelApplet * applet);
static void _close_destroy(PanelApplet * applet);
/* useful */
static void _close_do(Close * close);
/* callbacks */
static void _on_close(gpointer data);
static GdkFilterReturn _on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data);
static void _on_screen_changed(GtkWidget * widget, GdkScreen * previous,
gpointer data);
/* public */
/* variables */
PanelApplet applet =
{
NULL,
"Close",
NULL,
_close_init,
_close_destroy,
NULL,
PANEL_APPLET_POSITION_END,
FALSE,
TRUE,
NULL
};
/* private */
/* functions */
/* close_init */
static GtkWidget * _close_init(PanelApplet * applet)
{
Close * close;
GtkWidget * image;
if((close = malloc(sizeof(*close))) == NULL)
return NULL;
applet->priv = close;
close->helper = applet->helper;
close->widget = gtk_button_new();
gtk_button_set_relief(GTK_BUTTON(close->widget), GTK_RELIEF_NONE);
image = gtk_image_new_from_stock(GTK_STOCK_CLOSE, GTK_ICON_SIZE_BUTTON);
gtk_button_set_image(GTK_BUTTON(close->widget), image);
g_signal_connect_swapped(G_OBJECT(close->widget), "clicked", G_CALLBACK(
_on_close), close);
g_signal_connect(G_OBJECT(close->widget), "screen-changed", G_CALLBACK(
_on_screen_changed), close);
close->display = NULL;
close->screen = NULL;
close->root = NULL;
close->atom_active = 0;
close->atom_close = 0;
close->window = None;
close->panel = None;
gtk_widget_show(close->widget);
return close->widget;
}
/* close_destroy */
static void _close_destroy(PanelApplet * applet)
{
Close * close = applet->priv;
free(close);
}
/* accessors */
/* close_get_window_property */
static int _close_get_window_property(Close * close, Window window,
Atom property, Atom atom, unsigned long * cnt,
unsigned char ** ret)
{
int res;
Atom type;
int format;
unsigned long bytes;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(close, window, %lu, %lu)\n", __func__,
property, atom);
#endif
gdk_error_trap_push();
res = XGetWindowProperty(GDK_DISPLAY_XDISPLAY(close->display), window,
property, 0, G_MAXLONG, False, atom, &type, &format,
cnt, &bytes, ret);
if(gdk_error_trap_pop() != 0 || res != Success)
return 1;
if(type != atom)
{
if(*ret != NULL)
XFree(*ret);
*ret = NULL;
return 1;
}
return 0;
}
/* close_do */
static void _close_do(Close * close)
{
unsigned long cnt = 0;
Window * window;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(_close_get_window_property(close, GDK_WINDOW_XWINDOW(close->root),
close->atom_active, XA_WINDOW, &cnt,
(void*)&window) != 0 || cnt != 1)
return;
if(*window != close->panel)
close->window = *window;
XFree(window);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %u\n", __func__, close->window);
#endif
}
/* callbacks */
/* on_close */
static void _on_close(gpointer data)
{
Close * close = data;
GdkDisplay * display;
XEvent xev;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %u\n", __func__, close->window);
#endif
if(close->window == None)
return;
display = close->display;
memset(&xev, 0, sizeof(xev));
xev.xclient.type = ClientMessage;
xev.xclient.window = close->window;
xev.xclient.message_type = close->atom_close;
xev.xclient.format = 32;
xev.xclient.data.l[0] = gdk_x11_display_get_user_time(display);
xev.xclient.data.l[1] = 2;
gdk_error_trap_push();
XSendEvent(GDK_DISPLAY_XDISPLAY(display),
GDK_WINDOW_XWINDOW(close->root), False,
SubstructureNotifyMask | SubstructureRedirectMask,
&xev);
gdk_error_trap_pop();
}
/* on_filter */
static GdkFilterReturn _on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data)
{
Close * close = data;
XEvent * xev = xevent;
if(xev->type != PropertyNotify)
return GDK_FILTER_CONTINUE;
if(xev->xproperty.atom != close->atom_active)
return GDK_FILTER_CONTINUE;
_close_do(close);
return GDK_FILTER_CONTINUE;
}
/* on_screen_changed */
static void _on_screen_changed(GtkWidget * widget, GdkScreen * previous,
gpointer data)
{
Close * close = data;
GdkWindow * window;
GdkEventMask events;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
close->screen = gtk_widget_get_screen(widget);
close->display = gdk_screen_get_display(close->screen);
close->root = gdk_screen_get_root_window(close->screen);
close->panel = ((window = gtk_widget_get_parent_window(widget)) != NULL)
? GDK_WINDOW_XID(window) : None;
events = gdk_window_get_events(close->root);
gdk_window_set_events(close->root, events
| GDK_PROPERTY_CHANGE_MASK);
gdk_window_add_filter(close->root, _on_filter, close);
close->atom_active = gdk_x11_get_xatom_by_name_for_display(
close->display, "_NET_ACTIVE_WINDOW");
close->atom_close = gdk_x11_get_xatom_by_name_for_display(
close->display, "_NET_CLOSE_WINDOW");
_close_do(close);
}