Desktop
/* $Id: locker.c,v 1.20 2011/09/20 10:24:04 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
{
/* settings */
int suspend;
Config * config;
/* internal */
GdkDisplay * display;
int screen;
int event;
GtkWidget ** windows;
size_t windows_cnt;
/* demo */
Plugin * dplugin;
LockerDemo * demo;
LockerDemoHelper dhelper;
/* plugin */
Plugin * pplugin;
LockerPlugin * plugin;
LockerPluginHelper phelper;
/* preferences */
GtkWidget * pr_window;
};
/* constants */
#define LOCKER_CONFIG_FILE ".locker"
/* 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);
static void _locker_on_realize(GtkWidget * widget, gpointer data);
/* public */
/* functions */
/* locker_new */
static int _new_config(Locker * locker);
static int _new_demo(Locker * locker, char const * demo);
static void _new_helpers(Locker * locker);
static GtkWidget * _new_plugin(Locker * locker, char const * plugin);
static int _new_xss(Locker * locker, size_t cnt);
Locker * locker_new(int suspend, char const * demo, char const * plugin)
{
Locker * locker;
GdkScreen * screen;
GtkWidget * widget = NULL;
size_t cnt;
size_t i;
GdkColor black;
GdkRectangle rect;
GdkWindow * root;
if((locker = object_new(sizeof(*locker))) == NULL)
{
_locker_error(NULL, error_get(), 1);
return NULL;
}
_new_helpers(locker);
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;
locker->dplugin = NULL;
locker->demo = NULL;
locker->pr_window = NULL;
/* check for errors */
if(_new_config(locker) != 0
|| _new_demo(locker, demo) != 0
|| (widget = _new_plugin(locker, plugin)) == NULL
|| _new_xss(locker, cnt) != 0)
{
_locker_error(NULL, error_get(), 1);
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);
g_signal_connect(locker->windows[i], "realize", G_CALLBACK(
_locker_on_realize), locker);
}
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;
}
static int _new_config(Locker * locker)
{
char const * homedir;
char * filename;
if((locker->config = config_new()) == NULL)
return -1;
if((homedir = getenv("HOME")) == NULL)
homedir = g_get_home_dir();
if((filename = malloc(strlen(homedir) + sizeof(LOCKER_CONFIG_FILE) + 1))
== NULL)
return -1;
sprintf(filename, "%s/%s", homedir, LOCKER_CONFIG_FILE);
if(config_load(locker->config, filename) != 0)
_locker_error(NULL, error_get(), 1);
free(filename);
return 0;
}
static int _new_demo(Locker * locker, char const * demo)
{
if(demo == NULL && (demo = config_get(locker->config, NULL, "demo"))
== NULL)
return 0;
if((locker->dplugin = plugin_new(LIBDIR, PACKAGE, "demos", demo))
== NULL)
return -1;
if((locker->demo = plugin_lookup(locker->dplugin, "demo")) == NULL)
return -1;
locker->demo->helper = &locker->dhelper;
if(locker->demo->init(locker->demo) != 0)
{
locker->demo = NULL;
return -1;
}
return 0;
}
static void _new_helpers(Locker * locker)
{
locker->dhelper.locker = locker;
locker->dhelper.error = _locker_error;
locker->phelper.locker = locker;
locker->phelper.error = _locker_error;
locker->phelper.action = _locker_action;
}
static GtkWidget * _new_plugin(Locker * locker, char const * plugin)
{
GtkWidget * widget;
if(plugin == NULL)
plugin = config_get(locker->config, NULL, "plugin");
if(plugin == NULL)
#ifdef EMBEDDED
plugin = "slider";
#else
plugin = "password";
#endif
if((locker->pplugin = plugin_new(LIBDIR, PACKAGE, "plugins", plugin))
== NULL)
return NULL;
if((locker->plugin = plugin_lookup(locker->pplugin, "plugin")) == NULL)
return NULL;
locker->plugin->helper = &locker->phelper;
if((widget = locker->plugin->init(locker->plugin)) == NULL)
{
locker->plugin = NULL;
return NULL;
}
return widget;
}
static int _new_xss(Locker * locker, size_t cnt)
{
int error;
/* register as screensaver */
if(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)
return -error_set_code(1, "%s", "Could not register as"
" screensaver");
return 0;
}
/* locker_delete */
void locker_delete(Locker * locker)
{
if(locker->plugin != NULL)
locker->plugin->destroy(locker->plugin);
if(locker->pplugin != NULL)
plugin_delete(locker->pplugin);
if(locker->demo != NULL)
locker->demo->destroy(locker->demo);
if(locker->dplugin != NULL)
plugin_delete(locker->dplugin);
free(locker->windows);
XScreenSaverUnregister(GDK_DISPLAY_XDISPLAY(locker->display),
locker->screen);
if(locker->config != NULL)
config_delete(locker->config);
object_delete(locker);
}
/* useful */
/* locker_show_preferences */
static void _preferences_window(Locker * locker);
/* callbacks */
static void _preferences_on_cancel(gpointer data);
static gboolean _preferences_on_closex(gpointer data);
static void _preferences_on_ok(gpointer data);
static void _preferences_on_response(GtkWidget * widget, gint response,
gpointer data);
void locker_show_preferences(Locker * locker, gboolean show)
{
if(locker->pr_window == NULL)
_preferences_window(locker);
if(locker->pr_window != NULL)
{
if(show)
gtk_window_present(GTK_WINDOW(locker->pr_window));
else
gtk_widget_hide(locker->pr_window);
return;
}
}
static void _preferences_window(Locker * locker)
{
GtkWidget * vbox;
GtkWidget * notebook;
locker->pr_window = gtk_dialog_new_with_buttons(
"Screensaver preferences", NULL, 0,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);
gtk_window_set_default_size(GTK_WINDOW(locker->pr_window), 400, 300);
g_signal_connect_swapped(locker->pr_window, "delete-event", G_CALLBACK(
_preferences_on_closex), locker);
g_signal_connect(locker->pr_window, "response", G_CALLBACK(
_preferences_on_response), locker);
notebook = gtk_notebook_new();
gtk_notebook_set_scrollable(GTK_NOTEBOOK(notebook), TRUE);
/* authentication */
/* FIXME implement */
gtk_notebook_append_page(GTK_NOTEBOOK(notebook), gtk_vbox_new(FALSE, 0),
gtk_label_new("Authentication"));
/* demos */
/* FIXME implement */
gtk_notebook_append_page(GTK_NOTEBOOK(notebook), gtk_vbox_new(FALSE, 0),
gtk_label_new("Demos"));
#if GTK_CHECK_VERSION(2, 14, 0)
vbox = gtk_dialog_get_content_area(GTK_DIALOG(locker->pr_window));
#else
vbox = GTK_DIALOG(locker->pr_window)->vbox;
#endif
gtk_box_pack_start(GTK_BOX(vbox), notebook, TRUE, TRUE, 0);
_preferences_on_cancel(locker);
gtk_widget_show_all(vbox);
}
static void _preferences_on_cancel(gpointer data)
{
/* FIXME implement */
}
static gboolean _preferences_on_closex(gpointer data)
{
Locker * locker = data;
gtk_widget_hide(locker->pr_window);
return TRUE;
}
static void _preferences_on_ok(gpointer data)
{
/* FIXME implement */
}
static void _preferences_on_response(GtkWidget * widget, gint response,
gpointer data)
{
gtk_widget_hide(widget);
if(response == GTK_RESPONSE_OK)
_preferences_on_ok(data);
else if(response == GTK_RESPONSE_CANCEL)
_preferences_on_cancel(data);
}
/* 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_SHOW_PREFERENCES:
locker_show_preferences(locker, TRUE);
return;
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)
{
GtkWidget * dialog;
if(locker == NULL)
{
fprintf(stderr, "%s: %s\n", "locker", message);
return ret;
}
dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
#if GTK_CHECK_VERSION(2, 6, 0)
"%s", "Error");
gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
#endif
"%s", message);
gtk_window_set_title(GTK_WINDOW(dialog), "Error");
gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(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)
{
LockerAction action;
gboolean show;
if(xclient->message_type != gdk_x11_get_xatom_by_name(
LOCKER_CLIENT_MESSAGE)
|| xclient->data.b[0] != LOCKER_MESSAGE_ACTION)
return GDK_FILTER_CONTINUE;
action = xclient->data.b[1];
switch(action)
{
case LOCKER_ACTION_ACTIVATE:
_locker_activate(locker);
break;
case LOCKER_ACTION_LOCK:
_locker_lock(locker);
break;
case LOCKER_ACTION_SHOW_PREFERENCES:
show = xclient->data.b[1] ? TRUE : FALSE;
locker_show_preferences(locker, show);
break;
case LOCKER_ACTION_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;
}
/* locker_on_realize */
static void _locker_on_realize(GtkWidget * widget, gpointer data)
{
Locker * locker = data;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %lu\n", __func__, GDK_WINDOW_XWINDOW(
widget->window));
#endif
if(locker->demo != NULL && locker->demo->add != NULL)
locker->demo->add(locker->demo, GDK_WINDOW_XWINDOW(
widget->window));
}