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/* $Id: xscreensaver.c,v 1.13 2012/09/22 01:21:51 khorben Exp $ */

/* 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 <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <signal.h>

#include <errno.h>

#include <gdk/gdkx.h>

#include <System.h>

#include "Locker/demo.h"

#include "../../config.h"

#ifndef PREFIX

# define PREFIX "/usr/local"

#endif

/* XScreensaver */

/* private */

/* types */

typedef struct _XScreensaverWindow

{

GdkWindow * window;

GPid pid;

} XScreensaverWindow;

typedef struct _LockerDemo

{

LockerDemoHelper * helper;

/* windows */

XScreensaverWindow * windows;

size_t windows_cnt;

} XScreensaver;

/* prototypes */

/* plug-in */

static XScreensaver * _xscreensaver_init(LockerDemoHelper * helper);

static void _xscreensaver_destroy(XScreensaver * xscreensaver);

static int _xscreensaver_add(XScreensaver * xscreensaver, GdkWindow * window);

static void _xscreensaver_remove(XScreensaver * xscreensaver,

GdkWindow * window);

static void _xscreensaver_start(XScreensaver * xscreensaver);

static void _xscreensaver_stop(XScreensaver * xscreensaver);

/* public */

/* variables */

/* plug-in */

LockerDemoDefinition plugin =

{

"XScreensaver",

NULL,

_xscreensaver_init,

_xscreensaver_destroy,

_xscreensaver_add,

_xscreensaver_remove,

_xscreensaver_start,

_xscreensaver_stop

};

/* private */

/* functions */

/* plug-in */

/* xscreensaver_init */

static XScreensaver * _xscreensaver_init(LockerDemoHelper * helper)

{

XScreensaver * xscreensaver;

if((xscreensaver = object_new(sizeof(*xscreensaver))) == NULL)

return NULL;

xscreensaver->helper = helper;

xscreensaver->windows = NULL;

xscreensaver->windows_cnt = 0;

return xscreensaver;

}

/* xscreensaver_destroy */

static void _xscreensaver_destroy(XScreensaver * xscreensaver)

{

size_t i;

/* kill the remaining children */

for(i = 0; i < xscreensaver->windows_cnt; i++)

if(xscreensaver->windows[i].pid > 0)

kill(xscreensaver->windows[i].pid, SIGTERM);

free(xscreensaver->windows);

object_delete(xscreensaver);

}

/* xscreensaver_add */

static XScreensaverWindow * _add_allocate(XScreensaver * xscreensaver);

static int _xscreensaver_add(XScreensaver * xscreensaver, GdkWindow * window)

{

int ret = 0;

LockerDemoHelper * helper = xscreensaver->helper;

XScreensaverWindow * w;

unsigned long id = GDK_WINDOW_XID(window);

GError * error = NULL;

char * argv[] = { NULL, "-window-id", NULL, NULL };

char const * p;

char buf[16];

#ifdef DEBUG

fprintf(stderr, "DEBUG: %s() %u\n", __func__, id);

#endif

if((w = _add_allocate(xscreensaver)) == NULL)

return -1; /* XXX report error */

if((p = helper->config_get(helper->locker, "xscreensaver",

"xscreensaver")) != NULL)

argv[0] = strdup(p);

else

argv[0] = strdup(PREFIX "/libexec/xscreensaver/bsod");

snprintf(buf, sizeof(buf), "%lu", id);

argv[2] = buf;

if(argv[0] == NULL)

return -helper->error(NULL, strerror(errno), 1);

if(g_spawn_async(NULL, argv, NULL, 0, NULL, NULL, &w->pid, &error)

!= TRUE)

{

ret = -helper->error(NULL, error->message, 1);

g_error_free(error);

}

w->window = window;

return ret;

}

static XScreensaverWindow * _add_allocate(XScreensaver * xscreensaver)

{

XScreensaverWindow * w;

size_t i;

/* look for a free window */

for(i = 0; i < xscreensaver->windows_cnt; i++)

if(xscreensaver->windows[i].window == NULL)

return &xscreensaver->windows[i];

/* allocate a window */

i = xscreensaver->windows_cnt + 1;

if((w = realloc(xscreensaver->windows, sizeof(*w) * i)) == NULL)

return NULL;

xscreensaver->windows = w;

w = &xscreensaver->windows[xscreensaver->windows_cnt++];

w->window = NULL;

w->pid = -1;

return w;

}

/* xscreensaver_remove */

static void _xscreensaver_remove(XScreensaver * xscreensaver,

GdkWindow * window)

{

size_t i;

XScreensaverWindow * w;

for(i = 0; i < xscreensaver->windows_cnt; i++)

if(xscreensaver->windows[i].window == window)

{

w = &xscreensaver->windows[i];

w->window = NULL;

kill(w->pid, SIGTERM);

w->pid = -1;

return;

}

/* FIXME free some memory */

}

/* xscreensaver_start */

static void _xscreensaver_start(XScreensaver * xscreensaver)

{

size_t i;

for(i = 0; i < xscreensaver->windows_cnt; i++)

if(xscreensaver->windows[i].pid > 0)

kill(xscreensaver->windows[i].pid, SIGCONT);

}

/* xscreensaver_stop */

static void _xscreensaver_stop(XScreensaver * xscreensaver)

{

size_t i;

for(i = 0; i < xscreensaver->windows_cnt; i++)

if(xscreensaver->windows[i].pid > 0)

kill(xscreensaver->windows[i].pid, SIGSTOP);

}