/*********************************************************************
**
** PROGRAM:   NS-Killer.epplet
**
** PURPOSE:   Kill hung ns processes and restart netscape
**
** DATE:      ver 0.1      20 Jun 2001
**            ver 0.2      11 Apr 2002
**            ver 0.9      18 Apr 2002
**
** AUTHOR:    Jed Record - <jed@5-20.org>
**
** LICENSE:   Copyright (c) 2001, 2002 Jed Record
**            See the file "COPYING" for details
**
** NOTES:     Updates should available at:
**            http://www.linuxbuilt.com/jed/projects/epplets/NS-Killer
**
**********************************************************************/
/* c headers */
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>

/* enlightenment headers */
#include <epplet.h>

/* define constants */
#define MY_NAME		"NS-Killer"
#define MY_VER		"0.1"
#define MY_INFO		"none"
#define MY_DATA		EROOT "/epplet_data/" MY_NAME "/files/"
#define	MY_IMAGE	MY_DATA "background.png"
#define	MY_BUTTON	MY_DATA "button.png"

/* we look for the the sound player in the makefile  *
 * if it's not found we use this as the default.     */
#if !defined(PLYSND)
    #define PLYSND	"/usr/bin/esdplay"
#endif
#define PLAY_SOUND1	PLYSND " " MY_DATA "NS-Killer.wav"
#define PLAY_SOUND2	PLYSND " " MY_DATA "NS-Killer2.wav"

/* declare variables */
Window win;
Epplet_gadget w_close, s_help, my_button;
char *myimg = MY_IMAGE;
char *mybtn = MY_BUTTON;
char *mysnd1 = PLAY_SOUND1;
char *mysnd2 = PLAY_SOUND2;
int  focus;
int  sound_count = 1;

/* baic events */
static void window_close(void *data);
static void show_help(void *data);
static void ns_expose(void *data, Window win, int x, int y, int w, int h);
static void restart_ns(void *data);

/* Focus behavior */
static void in_focus(void *data, Window win);
static void out_focus(void *data, Window win);


static void 
window_close(void *data)
{
  Epplet_unremember();
  Esync();
  data = NULL;
  exit(0);
}

static void 
show_help(void *data)
{
   Epplet_show_about("NS-Killer");
   return;
   data = NULL;
}

static void 
out_focus(void *data, Window win) 
{
  if( win == Epplet_get_main_window() )
  {
    Epplet_gadget_hide(w_close);
    Epplet_gadget_hide(s_help);
    Epplet_gadget_hide(my_button);
  }
  return;
  data = NULL;
}

static void 
in_focus(void *data, Window win) 
{
  if( win == Epplet_get_main_window() )
  {
    Epplet_gadget_show(w_close);
    Epplet_gadget_show(s_help);
    Epplet_gadget_show(my_button);
  }
  return;
  data = NULL;
}

static void
ns_expose(void *data, Window win, int x, int y, int w, int h)
{
  return;
  data = NULL;
  win = (Window) 0;
  x = y = w = h = 0;
}

static void 
restart_ns(void *data)
{

    int buffsize = 512;
    int nspid;
    char buffer[buffsize];
    char *lockpref;
    char *pidstr;
    char *homeptr;
    char mylock[buffsize];

    homeptr = getenv("HOME");
    strcpy(mylock, homeptr);
    strcat(mylock, "/.netscape/lock");

    /* is there a lockfile? */
    if( readlink(mylock,buffer,buffsize) < 0 ) {
      /* no lock, user was probably taking a shortcut */
      Epplet_spawn_command("netscape");
      Esync();
      return;
      data = NULL;
    }

    lockpref = strtok(buffer, ":");
    pidstr = strtok(NULL, ":");
    nspid = atoi(pidstr);

    /* try and kill netscape */
    if( kill(nspid, 9) == 0 )
    {
      /* success! remove the lock, and play smash sound */
      unlink(mylock);
      if( sound_count )
      {
	system(mysnd1);
	--sound_count;
      } else {
	system(mysnd2);
	++sound_count;
      }
    }

    Epplet_spawn_command("netscape");
    Esync();
    return;
    data = NULL;

}
      

/* main body */
int 
main(int argc, char **argv)
{

  /* make sure we exit nicely */
  atexit(Epplet_cleanup);

  /* initialize the epplet with enlightenment */
  Epplet_Init(MY_NAME, MY_VER, MY_INFO, 3, 3, argc, argv, 0);

  w_close = Epplet_create_button(NULL, NULL, 
	2, 2, 0, 0, "CLOSE", 0, NULL, window_close, NULL); 
  s_help = Epplet_create_button(NULL, NULL,
	34, 2, 0, 0, "HELP", 0, NULL, show_help, NULL);   
  my_button = Epplet_create_text_button("Kill NS!",
	3, 20, 40, 15, restart_ns, NULL);

  Epplet_gadget_show( 
	Epplet_create_image(2, 2, 44, 44, myimg) );

  Epplet_register_focus_in_handler(in_focus, NULL);
  Epplet_register_focus_out_handler(out_focus, NULL);
  Epplet_register_expose_handler(ns_expose, NULL);

  win = Epplet_get_main_window();
  
  Epplet_show();
  Epplet_Loop();
  return 0;
}