/* 
* This code is Copyright (c) 2006 Derek den Haas and Sjoerd van der Hoorn, 
 * all rights reserved. This code is for use with the vOS virtual GUI. Do
 * not use these files within your own projects. Redistribution and use in 
 * source and binary forms, with or without modification, are not permitted. 
 * More information about vOS can be found at http://www.vschool.nl/.
 */

// Class prototype
// ---------------
function vApp(_vApp_file, _vApp_parameters)
{
	//The functions
	this.load 		= _vApp_load;
	this.data 		= _vApp_data;
	this.enable 	= _vApp_enable;
	this.disable 	= _vApp_disable;
	this.stop 		= _vApp_stop;
	this.vAlert		= _vApp_vAlert;
	this.vPrompt	= _vApp_vPrompt;
	
	//The variables
	this.vApp_pid 			= vOS.arr_vApps.length;
	this.vApp_file 			= _vApp_file;
	this.vApp_parameters 	= _vApp_parameters;
	this.vApp_process 		= "vOS.arr_vApps[" + this.vApp_pid + "]";
	this.vApp_path 			= this.vApp_file.indexOf("/") > 0 ? _vApp_file.substr(0, _vApp_file.lastIndexOf("/") + 1) : "";
	this.timers 			= new Array();
	
	vOS.arr_vApps[this.vApp_pid] = this;
	//Begin script
	if (typeof(vOS.arr_vPrograms[this.vApp_file]) != "object")
	{
		//cache queue
		vOS.arr_vPrograms[this.vApp_file] = new Array();
		vOS.arr_vPrograms[this.vApp_file]['state'] = 2;
		
		var _vApp_xml_request = new Array();
		_vApp_xml_request["xml"] = new XMLHttpRequest();
		// Keep the vApp id in cache!
		_vApp_xml_request["id"] = this.vApp_pid;
		if (_vApp_xml_request["xml"])
		{
			_vApp_xml_request["xml"].onreadystatechange = function()
			{
				if (_vApp_xml_request["xml"].readyState == 4 && _vApp_xml_request["xml"].status == 200)
				{
					var that = vOS.arr_vApps[_vApp_xml_request["id"]];
					vOS.vTime_change(_vApp_xml_request["xml"].getResponseHeader("Date"));
					// put in cache
					vOS.arr_vPrograms[that.vApp_file]['code'] = _vApp_xml_request["xml"].responseText;
					vOS.arr_vPrograms[that.vApp_file]['state'] = 1;
					// Load it
					that.load(_vApp_xml_request["xml"].responseText);
					// ! No cache
					vOS.arr_vPrograms[that.vApp_file] = undefined;
					return;
				}
				if (_vApp_xml_request["xml"].readyState == 4 && _vApp_xml_request["xml"].status != 200)
				{
					var that = vOS.arr_vApps[_vApp_xml_request["id"]];
					alert("Program \"" + that.vApp_file + "\" doesn't exists!\nStatus: "+_vApp_xml_request["xml"].status);
					that.stop();
					//Program doesn't exists or server down, don't cache!
					vOS.arr_vPrograms[that.vApp_file] = undefined;
					return;
				}
			}
			_vApp_xml_request["xml"].open("POST", _vApp_file, true);
			_vApp_xml_request["xml"].setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
			_vApp_xml_request["xml"].send("");
		}
	}
	else if (vOS.arr_vPrograms[this.vApp_file]['state'] == 1)
	{
		// Load the code
		this.load(vOS.arr_vPrograms[this.vApp_file]['code']);
	}
	else if (vOS.arr_vPrograms[this.vApp_file]['state'] == 2)
	{
		//Flood of this program, don't load it :)
		alert("Still loading an application, can't open it again!");
		this.stop();
	}
	
	//Now the functions:
	function _vApp_load(_vApp_code)
	{
		//It's now back in the right THIS :D
		eval(_vApp_code);
		this.onLoad(this.vApp_parameters);
	}
	
	function _vApp_data(_vApp_callback, _vApp_file, _vApp_parameters_array, _vApp_callbackparameters)
	{
		// Call the function to load data from external files
		vOS.data("vApp", _vApp_callback, _vApp_file, _vApp_parameters_array, _vApp_callbackparameters, this.vApp_pid)
	}
	
	function _vApp_enable()
	{
		// Enable all disabled windows within the application
		var x = 0;
		while (x < vOS.arr_vWindows.length)
		{
			if (vOS.arr_vWindows[x].vApp_pid == this.vApp_pid)
			{
				vOS.arr_vWindows[vOS.arr_vWindows[x].vWindow_id].enable();
			}
			x++;
		}
		return null;
	}
	function _vApp_disable()
	{
		// Disable all the windows within the application. Keep in mind that you can make new windows who's status won't be disabled
		var x = 0;
		while (x < vOS.arr_vWindows.length)
		{
			if (vOS.arr_vWindows[x].vApp_pid == this.vApp_pid)
			{
				vOS.arr_vWindows[vOS.arr_vWindows[x].vWindow_id].disable();
			}
			x++;
		}
		return null;
	}
	
	function _vApp_stop()
	{
		// Shut down the application completely by removing all windows, taskbar icons
		// and scripts related to it.
		// Stop timers
		for(var x = 0; x < this.timers.length; x++)
		{
			this.timers[x].stop();
		}
		var x = 0;
		// Close windows
		while (x < vOS.arr_vWindows.length)
		{
			if (vOS.arr_vWindows[x].vApp_pid == this.vApp_pid)
			{
				vOS.arr_vWindows[vOS.arr_vWindows[x].vWindow_id].close();
				x = -1;
			}
			x++;
		}
		// Remove taskbar icons
		var x = 0
		while (x < vOS.taskbar.taskbar_icons.childNodes.length)
		{
			if (vOS.taskbar.taskbar_icons.childNodes[x].vApp_pid == this.vApp_pid)
			{
				vOS.taskbar.taskbar_icons.removeChild(vOS.taskbar.taskbar_icons.childNodes[x]);
				x = -1;
			}
			x++;
		}
		// And remove all code corresponding with this application
		vOS.arr_vApps[this.vApp_pid] = undefined;
		// Return nothing
		return 1;
	}
	
	function _vApp_vAlert(_vApp_vAlert_text, _vApp_vAlert_title, _vApp_vAlert_buttons)
	{
		// Call the function in vOS.vDialog to show a vAlert
		vOS.vDialog.vAlert(_vApp_vAlert_text, _vApp_vAlert_title, _vApp_vAlert_buttons, "vApp", this);
	}
	
	function _vApp_vPrompt(_vApp_vPrompt_text, _vApp_vPrompt_title, _vApp_vPrompt_default)
	{
		// Call the function in vOS.vDialog to show a vPrompt
		vOS.vDialog.vPrompt(_vApp_vPrompt_text, _vApp_vPrompt_title, _vApp_vPrompt_default, "vApp", this);
	}
}
add_counter(10);