Desktop
/* $Id: locker.c,v 1.16 2011/08/16 23:53:09 khorben Exp $ */
/* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Locker */
/* 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 <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include <X11/extensions/scrnsaver.h>
#include <System.h>
#include "locker.h"
#include "../config.h"
#define max(a, b) ((a) > (b) ? (a) : (b))
#define min(a, b) ((a) < (b) ? (a) : (b))
/* Locker */
/* private */
/* types */
struct _Locker
{
LockerPluginHelper helper;
/* preferences */
int suspend;
/* internal */
GdkDisplay * display;
int screen;
int event;
GtkWidget ** windows;
size_t windows_cnt;
LockerPlugin * plugin;
};
/* prototypes */
static void _locker_action(Locker * locker, LockerAction action);
static void _locker_activate(Locker * locker);
static int _locker_error(Locker * locker, char const * message, int ret);
static void _locker_lock(Locker * locker);
static void _locker_unlock(Locker * locker);
/* callbacks */
static gboolean _lock_on_closex(void);
static GdkFilterReturn _locker_on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data);
/* public */
/* functions */
/* locker_new */
Locker * locker_new(int suspend, char const * name)
{
Locker * locker;
LockerPlugin * plugin;
GdkScreen * screen;
int error;
GtkWidget * widget = NULL;
size_t cnt;
size_t i;
GdkColor black;
GdkRectangle rect;
GdkWindow * root;
if(name == NULL)
#ifdef EMBEDDED
name = "slider";
#else
name = "password";
#endif
if((locker = object_new(sizeof(*locker))) == NULL)
return NULL;
locker->helper.locker = locker;
locker->helper.error = _locker_error;
locker->helper.action = _locker_action;
locker->suspend = (suspend != 0) ? 1 : 0;
screen = gdk_screen_get_default();
locker->display = gdk_screen_get_display(screen);
locker->screen = gdk_x11_get_default_screen();
cnt = gdk_screen_get_n_monitors(screen);
locker->windows = NULL;
locker->windows_cnt = cnt;
if((plugin = plugin_new(LIBDIR, PACKAGE, "plugins", name)) != NULL
&& (locker->plugin = plugin_lookup(plugin, "plugin"))
!= NULL)
{
locker->plugin->helper = &locker->helper;
widget = locker->plugin->init(locker->plugin);
}
if(widget == NULL || XScreenSaverQueryExtension(GDK_DISPLAY_XDISPLAY(
locker->display), &locker->event,
&error) == 0
|| XScreenSaverRegister(
GDK_DISPLAY_XDISPLAY(locker->display),
locker->screen, getpid(), XA_INTEGER) == 0
|| (locker->windows = malloc(sizeof(*locker->windows)
* cnt)) == NULL)
{
locker->plugin = NULL;
if(plugin != NULL)
plugin_delete(plugin);
locker_delete(locker);
return NULL;
}
/* create windows */
memset(&black, 0, sizeof(black));
for(i = 0; i < locker->windows_cnt; i++)
{
locker->windows[i] = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gdk_screen_get_monitor_geometry(screen, i, &rect);
gtk_window_move(GTK_WINDOW(locker->windows[i]), rect.x, rect.y);
gtk_window_resize(GTK_WINDOW(locker->windows[i]), rect.width,
rect.height);
gtk_window_stick(GTK_WINDOW(locker->windows[i]));
gtk_widget_modify_bg(locker->windows[i], GTK_STATE_NORMAL,
&black);
gtk_window_set_keep_above(GTK_WINDOW(locker->windows[i]), TRUE);
g_signal_connect_swapped(G_OBJECT(locker->windows[i]),
"delete-event", G_CALLBACK(_lock_on_closex),
NULL);
}
gtk_container_set_border_width(GTK_CONTAINER(locker->windows[0]), 4);
gtk_container_add(GTK_CONTAINER(locker->windows[0]), widget);
root = gdk_get_default_root_window();
XScreenSaverSelectInput(GDK_DISPLAY_XDISPLAY(locker->display),
GDK_WINDOW_XWINDOW(root), ScreenSaverNotifyMask);
gdk_x11_register_standard_event_type(locker->display, locker->event, 1);
gdk_window_add_filter(root, _locker_on_filter, locker);
gdk_display_add_client_message_filter(locker->display, gdk_atom_intern(
LOCKER_CLIENT_MESSAGE, FALSE),
_locker_on_filter, locker);
return locker;
}
/* locker_delete */
void locker_delete(Locker * locker)
{
if(locker->plugin != NULL)
/* FIXME also call plugin_delete() */
locker->plugin->destroy(locker->plugin);
free(locker->windows);
XScreenSaverUnregister(GDK_DISPLAY_XDISPLAY(locker->display),
locker->screen);
object_delete(locker);
}
/* private */
/* functions */
/* useful */
/* locker_action */
static void _locker_action(Locker * locker, LockerAction action)
{
switch(action)
{
case LOCKER_ACTION_ACTIVATE:
_locker_activate(locker);
break;
case LOCKER_ACTION_LOCK:
_locker_lock(locker);
break;
case LOCKER_ACTION_UNLOCK:
_locker_unlock(locker);
break;
}
locker->plugin->action(locker->plugin, LOCKER_ACTION_ACTIVATE);
}
/* locker_activate */
static void _locker_activate(Locker * locker)
{
XActivateScreenSaver(GDK_DISPLAY_XDISPLAY(locker->display));
}
/* locker_error */
static int _locker_error(Locker * locker, char const * message, int ret)
{
if(locker == NULL)
fprintf(stderr, "%s: %s\n", "locker", message);
/* XXX otherwise popup an error dialog */
return ret;
}
/* locker_lock */
static void _locker_lock(Locker * locker)
{
size_t i;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
for(i = 0; i < locker->windows_cnt; i++)
{
gtk_widget_show(locker->windows[i]);
gtk_window_fullscreen(GTK_WINDOW(locker->windows[i]));
}
locker->plugin->action(locker->plugin, LOCKER_ACTION_LOCK);
}
/* locker_unlock */
static void _locker_unlock(Locker * locker)
{
size_t i;
if(locker->windows == NULL)
return;
for(i = 0; i < locker->windows_cnt; i++)
gtk_widget_hide(locker->windows[i]);
}
/* callbacks */
/* locker_on_closex */
static gboolean _lock_on_closex(void)
{
return TRUE;
}
/* locker_on_filter */
static GdkFilterReturn _filter_client_message(Locker * locker,
XClientMessageEvent * xclient);
static GdkFilterReturn _filter_xscreensaver_notify(Locker * locker,
XScreenSaverNotifyEvent * xssne);
static GdkFilterReturn _locker_on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data)
{
Locker * locker = data;
XEvent * xev = xevent;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() 0x%x 0x%x\n", __func__, xev->type,
event->type);
#endif
if(xev->type == ClientMessage)
return _filter_client_message(locker, xevent);
else if(xev->type == locker->event)
return _filter_xscreensaver_notify(locker, xevent);
else
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_client_message(Locker * locker,
XClientMessageEvent * xclient)
{
LockerMessage message;
if(xclient->message_type != gdk_x11_get_xatom_by_name(
LOCKER_CLIENT_MESSAGE))
return GDK_FILTER_CONTINUE;
message = xclient->data.b[1];
switch(message)
{
case LOCKER_MESSAGE_LOCK:
_locker_lock(locker);
break;
case LOCKER_MESSAGE_UNLOCK:
_locker_unlock(locker);
break;
}
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_xscreensaver_notify(Locker * locker,
XScreenSaverNotifyEvent * xssne)
{
switch(xssne->state)
{
case ScreenSaverOff:
/* FIXME anything to do here? */
break;
case ScreenSaverOn:
_locker_lock(locker);
break;
case ScreenSaverDisabled:
/* FIXME implement */
break;
}
return GDK_FILTER_CONTINUE;
}