/**

 * Widget object constructor

 * @param {void}

 *     widget()

 * @return {void}

 */ 

function Widget()

{

	//	widget identifier, dummy value

	this.identifier = 14021981;

	this.isrotationsupported = true;

	//	widget event triggers

	this.onshow = null;

	this.onhide = null;

	/*

	 * Custom extra functionalities to support

	 */

	this.path = document.location.pathname;

	this.sysAPI = null;

	this.onload = null;

	this.opacity = 50;

	this.interval = 20;

	this.isFront = false;

	this.preferenceArray = new Array();

	this.preferenceKey  = 0;

}

/**

 * Launches the browser with the specified url 

 * @param {String} url

 *     openURL()

 * @return {Void}

 */ 

Widget.prototype.openURL = function(url)

{

   if (url) {

	   window.open(url ,"New Widget Window",'height=200 width=250');

   }

}

/**

 * Returns previously stored preference associated with the specified key

 * @param {String} Key preference value to be fetch

 *     preferenceForKey()

 * @return {String} Value

 */ 

Widget.prototype.preferenceForKey = function(key){

	var name = "Nokia_WRT#" + this.path + "#" + key;

	var result = readCookie(document, name);

	return result;

}

/**

 * Stores the key associated with the specified preference

 * @param {String} Preference value to be stored 

 * @param {String} Key Preference value associated to

 *     setPreferenceForKey()

 * @return {Void}

 */ 

Widget.prototype.setPreferenceForKey = function(preference, key)

{

	var value;

	//Specifying null for the preference parameter removes the specified key from the preferences

	if(key == null){

		if(this.preferenceKey>0){

			this.preferenceKey--;

		}

		//delete from cookies

	}

	value = "Nokia_WRT#"+this.path+"#"+key;

	this.preferenceArray[this.preferenceKey] = value;

	createCookie(document,value,preference,240000);

	this.preferenceKey++;

	//save cookie for cookies

	updateMainCookie(document);

}

/**

 * Toggle between Tabbed navigation mode or Cursor mode

 * @param {Boolean} Value

 *     setNavigationEnabled()

 * @return {Void}

 */ 

Widget.prototype.setNavigationEnabled = function(bool)

{

	//This function can not be used on preview browser

}

/**

 * Open S0-Application identified by UID along with the specified params

 * @param {Integer} Uid hexadecimal value to a specified application

 * @param {String} Value

 *     openApplication()

 * @return {Void}

 */ 

Widget.prototype.openApplication = function(Uid, param)

{

	alert("openApplication function won't be simulated in this application");

}

/**

 * Prepares the Widget.to do transition to specified transitionState

 * @param {String} Value Transition state

 *     prepareForTransition()

 * @return {Void}

 */ 

Widget.prototype.prepareForTransition = function(transitionState)

{

    this.isFront = ("" + transitionState).toLowerCase() != "toback";

    window.document.getElementsByTagName("body")[0].style.opacity = "0.3";

}

/**

 * Does the animation to make the transition between the specified transitionState

 * @param {Void}

 *     performTransition()

 * @return {Void}

 */ 

Widget.prototype.performTransition = function()

{

    var _self = this;

    this.opacity = 0;

    this.interval = window.setInterval(function() {

      _self.opacity += 0.2;

      if (_self.opacity > 1) {

        _self.opacity = 1;

      }

      window.document.getElementsByTagName("body")[0].style.opacity = _self.opacity + "";

      if (_self.opacity >= 1) {

       window.clearInterval(_self.interval);

       window.document.getElementsByTagName("body")[0].style.opacity = "1";

      }

      //do nothing

    }, 50);  

      //do nothing

}

/**

 * Set the preferred screen orientation to landscape. 

 * The display will flip if the phone display orientation 

 * is portrait and the phone supports landscape mode.

 * @param {Void}

 *     setDisplayLandscape()

 * @return {Void}

 */ 

Widget.prototype.setDisplayLandscape = function(){

	try 

	{

		if (this.isrotationsupported && childToParent_Reference.Emulator.orientation_mode != 'landscape') 

		{

			childToParent_Reference.Emulator.changeOrientation(childToParent_Reference.$('DisplayOrientation'));

		}

	} 

	catch (e) {}

}

/**

 * Set the preferred screen orientation to portrait.  

 * The display will flip if the phone display orientation 

 * is landscape and the phone supports portrait mode.

 * @param {Void}

 *     setDisplayPortrait()

 * @return {Void}

 */ 

Widget.prototype.setDisplayPortrait = function()

{

	try 

	{

		if (this.isrotationsupported && childToParent_Reference.Emulator.orientation_mode != 'portrait') 

		{

			childToParent_Reference.Emulator.changeOrientation(childToParent_Reference.$('DisplayOrientation'));

		}

	} 

	catch (e) {}

}

/**

 * Allows the definition of a function to be called 

 * when a Widget.is displayed 

 * @param {Void}

 *     onshow()

 * @return {Void}

 */ 

Widget.prototype.onshow = function()

{

	// to be implemented

}

/**

 * Allows the definition of a function to be called 

 * when a Widget.sent into the background (hidden) 

 * @param {Void}

 *     onhide()

 * @return {Void}

 */ 

Widget.prototype.onhide  = function()

{

	// to be implemented

}

/**

 * This function returns the System API if sysinfo is included in document embed

 */

Widget.prototype.enableSystemApi = function()

{

	//	Identify, and Attach System-Info-Object properties

	try 

	{

		var parentIframeRef = window.parent.frames[0];

		if(parentIframeRef) 

		{

			if (parentIframeRef.document.embeds.length > 0) {

				for (var i = 0; i < parentIframeRef.document.embeds.length; i++) 

				{

					//match the system Info API embed tag

					if (parentIframeRef.document.embeds[i].type == 'application/x-systeminfo-widget') 

					{

						new systemAPI(parentIframeRef.document.embeds[i]);

						widget.sysAPI = parentIframeRef.document.embeds[i];

					}

				}

			}

		}

	} 

	catch (e) {

		alert('Error in attachSysInfo: ' + e);

	}	

	//	Attach menu object to window

	window.menu = new Menu();

	// Attach window reference to the Parent Window	

	window.parent.Emulator.parentToChild_Reference = window;

	//	add event listener to window.focus

	window.onfocus = function(){ menu.cancel();	}

	//	add event listener to window.focus

	window.onunload = function()

	{ 

		try

		{

			//	Trigger Callback of Widget.onHide function

			if(typeof(widget.onhide) == 'function')

			{

				widget.onhide();

			}

		}

		catch(e){ errorLog('widget.onhide: '+e.description, 0); }

	}

	/*

	 * Used as a bridge between, Child widget & Parent window

	 */

	window.childToParent_Reference = window.parent;

}

/*

 * support functions for widget object

 */

/**

 * This function stores cookie for all the cookies

 * to help finding cookies of the same document while clearing preferences

 * @param doucment -- Document object

 */

function updateMainCookie(doucment){

	var temp="";

	name = "Nokia_WRT#"+widget.path;

	for (var k = 0; k<widget.preferenceArray.length; k++){

		temp = temp+"|"+widget.preferenceArray[k];

	}

	createCookie(document,name,temp,24000);

}

/**

 * This function creates cookie for the setPreferenceForKey function in order to save key-pref persistently

 * 

 * @param document -- Document object

 * @param name -- Name of the cookie

 * @param value -- value for the name cookie

 * @param days -- expire

 * 

 */

function createCookie(document,name,value,days) {

    if (days) {

		var date = new Date();

		date.setTime(date.getTime()+(days*24*60*60*1000));

		var expires = "; expires="+date.toGMTString();

	}

	else var expires = "";

	document.cookie = name+"="+value+expires+"; path=/"

} 

/**

 * This function retrieves back the values from the cookies

 * @param document

 * @param name

 * @return

 */

function readCookie(document , name) {

	var nameEQ = name + "=";

	var ca = document.cookie.split(';');

	for(var i=0;i < ca.length;i++) {

		var c = ca[i];

		while (c.charAt(0)==' ') c = c.substring(1,c.length);

		if (c.indexOf(nameEQ) == 0) {

			return c.substring(nameEQ.length,c.length);

		}

	}

	return undefined;

}

/*

 * /////////////////////////////////////////////////////////////////////////////////////

 * //////////////////////////////	  Ends here		  //////////////////////////////////

 * /////////////////////////////////////////////////////////////////////////////////////

 */

function errorLog(str, flag)

{

//	alert(str);

}

/*

 * by John Resig

 * @reference: http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html

 */

function addEvent( obj, type, fn ){ 

   if (obj.addEventListener){ 

      obj.addEventListener( type, fn, false );

   }

   else if (obj.attachEvent){ 

      obj["e"+type+fn] = fn; 

      obj[type+fn] = function(){ obj["e"+type+fn]( window.event ); } 

      obj.attachEvent( "on"+type, obj[type+fn] ); 

   } 

}

/*

 * 		Create a new Widget Object when DOM ready

 * 

*/

try 

{

	//	attach widget object to window

	var widget = new Widget();

	//	attach the System-Info api specific functionality

	addEvent(window, 'load', widget.enableSystemApi);

} 

catch (e) 

{

	alert('Exception: Widget object creation');

}