Desktop
/* $Id: locker.c,v 1.4 2011/02/24 22:25:00 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 <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include <X11/extensions/scrnsaver.h>
#include <System.h>
#include "locker.h"
#define max(a, b) ((a) > (b) ? (a) : (b))
#define min(a, b) ((a) < (b) ? (a) : (b))
/* Locker */
/* private */
/* types */
struct _Locker
{
GdkDisplay * display;
int screen;
int event;
GtkWidget * window;
GtkWidget * unlock;
GtkWidget * scale;
guint source;
};
/* prototypes */
static void _locker_lock(Locker * locker);
static void _locker_unlock(Locker * locker);
static void _locker_unlock_dialog(Locker * locker);
/* public */
/* functions */
/* locker_new */
static GdkFilterReturn _locker_on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data);
Locker * locker_new(void)
{
Locker * locker;
GdkScreen * screen;
int error;
Window root;
if((locker = object_new(sizeof(*locker))) == NULL)
return NULL;
screen = gdk_screen_get_default();
locker->display = gdk_screen_get_display(screen);
locker->screen = gdk_x11_get_default_screen();
locker->window = NULL;
locker->source = 0;
if(XScreenSaverQueryExtension(GDK_DISPLAY_XDISPLAY(locker->display),
&locker->event, &error) == 0
|| XScreenSaverRegister(
GDK_DISPLAY_XDISPLAY(locker->display),
locker->screen, getpid(), XA_INTEGER) == 0)
{
object_delete(locker);
return NULL;
}
root = gdk_x11_get_default_root_xwindow();
XScreenSaverSelectInput(GDK_DISPLAY_XDISPLAY(locker->display), root,
ScreenSaverNotifyMask);
gdk_x11_register_standard_event_type(locker->display, locker->event, 1);
gdk_window_add_filter(gdk_get_default_root_window(), _locker_on_filter,
locker);
return locker;
}
static GdkFilterReturn _locker_on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data)
{
Locker * locker = data;
XScreenSaverNotifyEvent * xssne = xevent;
if(xssne->type != locker->event)
return GDK_FILTER_CONTINUE;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() 0x%x\n", __func__, event->type);
#endif
switch(xssne->state)
{
case ScreenSaverOff:
_locker_unlock_dialog(locker);
break;
case ScreenSaverOn:
_locker_lock(locker);
break;
case ScreenSaverDisabled:
/* FIXME implement */
break;
}
return GDK_FILTER_CONTINUE;
}
/* locker_delete */
void locker_delete(Locker * locker)
{
if(locker->source != 0)
g_source_remove(locker->source);
XScreenSaverUnregister(GDK_DISPLAY_XDISPLAY(locker->display),
locker->screen);
object_delete(locker);
}
/* private */
/* functions */
/* useful */
/* locker_lock */
static gboolean _lock_on_closex(void);
static gboolean _lock_on_timeout(gpointer data);
static void _lock_on_value_changed(gpointer data);
static gboolean _lock_on_value_timeout(gpointer data);
static void _locker_lock(Locker * locker)
{
GdkColor black;
GtkWidget * hbox;
GtkWidget * widget;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(locker->window != NULL)
{
gtk_widget_hide(locker->unlock);
gtk_range_set_value(GTK_RANGE(locker->scale), 0.0);
gtk_widget_show(locker->window);
gtk_window_fullscreen(GTK_WINDOW(locker->window));
return;
}
locker->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_container_set_border_width(GTK_CONTAINER(locker->window), 4);
memset(&black, 0, sizeof(black));
gtk_widget_modify_bg(locker->window, GTK_STATE_NORMAL, &black);
gtk_window_set_keep_above(GTK_WINDOW(locker->window), TRUE);
g_signal_connect_swapped(G_OBJECT(locker->window), "delete-event",
G_CALLBACK(_lock_on_closex), NULL);
/* FIXME implement a plug-in system instead */
locker->unlock = gtk_vbox_new(FALSE, 4);
hbox = gtk_hbox_new(FALSE, 4);
widget = gtk_image_new_from_icon_name("stock_lock",
GTK_ICON_SIZE_LARGE_TOOLBAR);
gtk_misc_set_alignment(GTK_MISC(widget), 1.0, 0.5);
gtk_misc_set_padding(GTK_MISC(widget), 0, 96);
gtk_box_pack_start(GTK_BOX(hbox), widget, TRUE, TRUE, 0);
locker->scale = gtk_hscale_new_with_range(0.0, 100.0, 0.1);
gtk_range_set_value(GTK_RANGE(locker->scale), 0.0);
gtk_scale_set_draw_value(GTK_SCALE(locker->scale), FALSE);
gtk_widget_set_size_request(locker->scale, 400, -1);
g_signal_connect_swapped(G_OBJECT(locker->scale), "value-changed",
G_CALLBACK(_lock_on_value_changed), locker);
gtk_box_pack_start(GTK_BOX(hbox), locker->scale, FALSE, TRUE, 0);
widget = gtk_image_new_from_icon_name("stock_lock-open",
GTK_ICON_SIZE_LARGE_TOOLBAR);
gtk_misc_set_alignment(GTK_MISC(widget), 0.0, 0.5);
gtk_misc_set_padding(GTK_MISC(widget), 0, 96);
gtk_box_pack_start(GTK_BOX(hbox), widget, TRUE, TRUE, 0);
gtk_widget_show_all(hbox);
gtk_box_pack_end(GTK_BOX(locker->unlock), hbox, FALSE, TRUE, 0);
gtk_container_add(GTK_CONTAINER(locker->window), locker->unlock);
if(locker->source != 0)
g_source_remove(locker->source);
locker->source = 0;
gtk_widget_show(locker->window);
gtk_window_fullscreen(GTK_WINDOW(locker->window));
}
static gboolean _lock_on_closex(void)
{
return TRUE;
}
static gboolean _lock_on_timeout(gpointer data)
{
Locker * locker = data;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
locker->source = 0;
#if 0 /* FIXME makes it currently impossible to unlock the screen again */
_locker_lock(locker);
#endif
return FALSE;
}
static void _lock_on_value_changed(gpointer data)
{
Locker * locker = data;
gdouble value;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(locker->source != 0)
g_source_remove(locker->source);
locker->source = 0;
value = gtk_range_get_value(GTK_RANGE(locker->scale));
if(value == 100.0)
_locker_unlock(locker);
else if(value != 0.0)
locker->source = g_timeout_add(1000, _lock_on_value_timeout,
locker);
}
static gboolean _lock_on_value_timeout(gpointer data)
{
Locker * locker = data;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
gtk_range_set_value(GTK_RANGE(locker->scale), 0.0);
locker->source = g_timeout_add(3000, _lock_on_timeout, locker);
return FALSE;
}
/* locker_unlock */
static void _locker_unlock(Locker * locker)
{
if(locker->window == NULL)
return;
gtk_widget_hide(locker->window);
}
/* locker_unlock_dialog */
static gboolean _unlock_dialog_on_timeout(gpointer data);
static void _locker_unlock_dialog(Locker * locker)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(locker->window == NULL)
return;
gtk_widget_show(locker->unlock);
if(locker->source != 0)
g_source_remove(locker->source);
locker->source = g_timeout_add(3000, _unlock_dialog_on_timeout,
locker);
}
static gboolean _unlock_dialog_on_timeout(gpointer data)
{
Locker * locker = data;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
locker->source = 0;
#if 0 /* FIXME makes it currently impossible to unlock the screen again */
_locker_lock(locker);
#endif
return FALSE;
}