/**
 * eGroupware JavaScript Framework
 *
 * @link http://www.egroupware.org
 * @author Andreas Stoeckel <as@stylite.de>
 * @version $Id$
 */


/**
 * Some constant definitions
 */

EGW_LINK_SOURCE_FRAMEWORK = 0;
EGW_LINK_SOURCE_LEGACY_IFRAME = 1;
EGW_LINK_SOURCE_POPUP = 2;

/**
 * Class: egw_fw
 * The egw_fw class is the base framework class. It wraps around all egw_fw_ui and
 * egw_fw_classes. It creates both, a side bar and a tab area and cares about linking.
 */


/**
 * The constructor of the egw_fw class.
 *
 * @param string _sidemenuId specifies the name of the div container which should contain the sidebar menu
 * @param string _tabsId specifies the name of the div container which should cotain the tab area
 * @param string _webserverUrl specifies the egroupware root url
 */
function egw_fw(_sidemenuId, _tabsId, _splitterId, _webserverUrl, _sideboxSizeCallback,
	_sideboxStartSize, _sideboxMinSize)
{
	/* Get the base div */
	this.sidemenuDiv = document.getElementById(_sidemenuId);
	this.tabsDiv = document.getElementById(_tabsId);
	this.splitterDiv = document.getElementById(_splitterId);
	this.webserverUrl = _webserverUrl;
	this.sideboxSizeCallback = _sideboxSizeCallback;
	window.egw_webserverUrl = _webserverUrl;

	this.sidemenuUi = null;
	this.tabsUi = null;

	this.categoryOpenCache = new Object();

	this.applications = new Object();
	this.activeApp = null;

	if (this.sidemenuDiv && this.tabsDiv && this.splitterDiv)
	{
		//Wrap a scroll area handler around the applications
		this.scrollAreaUi = new egw_fw_ui_scrollarea(this.sidemenuDiv);

		//Create the sidemenu, the tabs area and the splitter
		this.sidemenuUi = new egw_fw_ui_sidemenu(this.scrollAreaUi.contentDiv,
			this.sortCallback);
		this.tabsUi = new egw_fw_ui_tabs(this.tabsDiv);
		this.splitterUi = new egw_fw_ui_splitter(this.splitterDiv,
			EGW_SPLITTER_VERTICAL, this.splitterResize, 
			[
				{
					"size": _sideboxStartSize,
					"minsize": _sideboxMinSize,
					"maxsize": 0
				},
			], this);
		

		this.loadApplications("home.jdots_framework.ajax_navbar_apps");
	}

	_sideboxSizeCallback(_sideboxStartSize);

	//Register the resize handler
	$(window).resize(function(){window.framework.resizeHandler()});

	//Register the global alert handler
	window.egw_alertHandler = this.alertHandler;

	//Register the key press handler
	//$(document).keypress(this.keyPressHandler);

	//Override the old egw_openWindowCentered2
	window.egw_openWindowCentered2 = this.egw_openWindowCentered2;

	//Override the app_window function
	window.egw_appWindow = this.egw_appWindow;
}

egw_fw.prototype.alertHandler = function(_message, _details)
{
	alert('Error:\n ' + _message + '\n\nDetails:\n ' + _details);
}

egw_fw.prototype.callManual = function()
{
	if (this.activeApp)
	{
		if (this.activeApp.browser.iframe)
		{
			this.activeApp.browser.iframe.contentWindow.callManual();
		}
	}
}

/**
 * Function called whenever F1 is pressed inside the framework
 * @returns boolean true if the call manual function could be called, false if the manual is not available
 */
egw_fw.prototype.f1Handler = function()
{
	if (typeof window.callManual != 'undefined')
	{
		window.callManual();
		return true;
	}
	return false;
}

/**
 * Function called whenever a key is pressed
 * @param object event describes the key press event
 */
egw_fw.prototype.keyPressHandler = function(event)
{
	switch (event.keyCode)
	{
		case 112: //F1
		{
			event.preventDefault();
			framework.f1Handler();
		}
	}
}

/**
 * Sets the active framework application to the application specified by _app
 */
egw_fw.prototype.setActiveApp = function(_app)
{
	//Only perform the following commands if a new application is activated
	if (_app != this.activeApp)
	{
		this.activeApp = _app;

		//Set the sidebox width if a application specific sidebox width is set
		if (_app.sideboxWidth !== false)
		{
			this.sideboxSizeCallback(_app.sideboxWidth);
			this.splitterUi.constraints[0].size = _app.sideboxWidth;
		}

		//Open the sidemenuUi that belongs to the app, if no sidemenu is attached
		//to the app, close the sidemenuUi
		if (_app.sidemenuEntry)
		{
			if (_app.hasSideboxMenuContent)
			{
				this.sidemenuUi.open(_app.sidemenuEntry);
			}
		}
		else
		{
			this.sidemenuUi.open(null);
		}

		//Set the website title
		if (_app.website_title)
		{
			document.title = _app.website_title;
		}

		//Show the application tab
		if (_app.tab)
		{
			this.tabsUi.showTab(_app.tab);
		}

		//Resize the scroll area...
		this.scrollAreaUi.update();

		//...and scroll to the top
		this.scrollAreaUi.setScrollPos(0);
	}
}

/**
 * Function called whenever the sidemenu entries are sorted
 */
egw_fw.prototype.sortCallback = function(_entriesArray)
{
	//Create an array with the names of the applications in their sort order	
	var name_array = new Array();
	for (var i = 0; i < _entriesArray.length; i++)
	{
		name_array.push(_entriesArray[i].tag.appName);
	}
	
	//Send the sort order to the server via ajax
	var req = new egw_json_request('home.jdots_framework.ajax_appsort',
		[name_array]);
	req.sendRequest(true);
}

/**
 * Function called whenever the sidebox is resized
 */
egw_fw.prototype.splitterResize = function(_width)
{
	if (this.tag.activeApp)
	{
		app_name = this.tag.activeApp.appName;
		var req = new egw_json_request(app_name + '.jdots_framework.ajax_sideboxwidth',
			[app_name, _width]);
		req.sendRequest(true);

		//If there are no global application width values, set the sidebox width of
		//the application every time the splitter is resized
		if (this.tag.activeApp.sideboxWidth !== false)
		{
			this.tag.activeApp.sideboxWidth = _width;
		}
	}
	this.tag.sideboxSizeCallback(_width);
}

/**
 * tabCloseClickCallback is used internally by egw_fw in order to handle clicks
 * on the close button of every tab.
 *
 * @param egw_fw_ui_tab _sender specifies the tab ui object, the user has clicked
 */
egw_fw.prototype.tabCloseClickCallback = function(_sender)
{
	//Save references to the application and the tabsUi as "this" will be deleted
	var app = this.tag;
	var tabsUi = this.parent;

	//At least one tab must stay open
	if (tabsUi.tabs.length > 1)
	{
		tabsUi.removeTab(this);
		app.tab = null;
		app.browser = null;

		if (app.sidemenuEntry)
			app.sidemenuEntry.hideAjaxLoader();

		//Set the active application to the application of the currently active tab
		app.parentFw.setActiveApp(tabsUi.activeTab.tag);
	}

	tabsUi.setCloseable(tabsUi.tabs.length > 1);

	//As a new tab might remove a row from the tab header, we have to resize all tab content browsers
	this.tag.parentFw.resizeHandler();
}

egw_fw.prototype.resizeHandler = function()
{
	//Resize the browser area of the applications
	for (var app in this.applications)
	{
		if (this.applications[app].browser != null)
		{
			this.applications[app].browser.resize();
		}
	}

	//Update the scroll area
	this.scrollAreaUi.update();
}

egw_fw.prototype.getIFrameHeight = function()
{
	var height = $(window).height() - (this.tabsUi.contHeaderDiv.offsetTop +
		this.tabsUi.contHeaderDiv.offsetHeight + 30); /* 30 is the height of the footer */
	return height;
}

/**
 * tabClickCallback is used internally by egw_fw in order to handle clicks on
 * a tab.
 *
 * @param egw_fw_ui_tab _sender specifies the tab ui object, the user has clicked
 */
egw_fw.prototype.tabClickCallback = function(_sender)
{
	//Set the active application in the framework
	this.tag.parentFw.setActiveApp(this.tag);
}

/**
 * applicationClickCallback is used internally by egw_fw in order to handle clicks on
 * an application in the sidebox menu.
 *
 * @param egw_fw_ui_tab _sender specifies the tab ui object, the user has clicked
 */
egw_fw.prototype.applicationClickCallback = function(_sender)
{
	this.tag.parentFw.applicationTabNavigate(this.tag, this.tag.indexUrl);
}

/**
 * Checks whether the application already owns a tab and creates one if it doesn't exist
 */
egw_fw.prototype.createApplicationTab = function(_app)
{
	if (_app.tab == null)
	{
		//Create the tab
		_app.tab = this.tabsUi.addTab(_app.icon, this.tabClickCallback, this.tabCloseClickCallback,
			_app);
		_app.tab.setTitle(_app.displayName);

		//Set the tab closeable if there's more than one tab
		this.tabsUi.setCloseable(this.tabsUi.tabs.length > 1);
	}
}

/**
 * Navigate to the tab of an application (opening the tab if not yet open)
 * 
 * @param egw_fw_class_application _app
 * @param string _url optional url, default index page of app
 */
egw_fw.prototype.applicationTabNavigate = function(_app, _url, _useIframe)
{
	//Create the tab for that application
	this.createApplicationTab(_app);

	if (typeof _url == 'undefined')
		_url = _app.indexUrl;

	if (typeof _useIframe == 'undefined')
	{
		if (!_url.match(/menuaction=/))
		{
			_useIframe = true;
		}
		else
		{
			_useIframe = _app.legacyApp;
		}
	}

	if (_app.browser == null)
	{
		//Create a new browser ui and set it as application tab callback
		var callback = new egw_fw_class_callback(this, this.getIFrameHeight);
		_app.browser = new egw_fw_content_browser(_app, callback);
		_app.tab.setContent(_app.browser.baseDiv);
	}

	_app.browser.browse(_url, true);//_useIframe);

	this.setActiveApp(_app);
}

/**
 * Tries to obtain the application from a menuaction
 */
egw_fw.prototype.parseAppFromUrl = function(_url)
{
	var _app = null;

	//Read the menuaction parts from the url and check whether the first part
	//of the url contains a valid app name	
	var matches = _url.match(/menuaction=([a-z0-9_-]+)\./i);
	if (matches && (_app = this.getApplicationByName(matches[1])))
	{
		return _app;
	}

	//Check the url for a scheme of "/app/something.php" and check this one for a valid app
	//name
	var matches = _url.match(/\/([^\/]+)\/[^\/]+\.php/i);
	if (matches && (_app = this.getApplicationByName(matches[1])))
	{
		return _app;
	}
	return null;
}

/**
 * loadApplicationsCallback is internally used by egw_fw in order to handle the
 * receiving of the application list.
 *
 * @param object apps contains the parsed JSON data describing the applications.
 *	The JSON object should have the following structure
 *		apps = array[
 *			{
 *				string name (the internal name of the application)
 *				string title (the name of the application how it should be viewed)
 *				string icon (path to the icon of the application)
 *				string url (path to the application) //TODO: Change this
 *				[boolean isDefault] (whether this entry is the default entry which should be opened)
 *			}
 *		]
 */
egw_fw.prototype.loadApplicationsCallback = function(apps)
{
	var defaultApp = null;

	//Iterate through the application array returned
	for (var i = 0; i < apps.length; i++)
	{
		var app = apps[i];

		//Check for the "legacyApp" flag - if it is not set, default it to true
		var legacyApp = true;
		if (typeof app.legacyApp != 'undefined')
			legacyApp = app.legacyApp;

		appData = new egw_fw_class_application(this, 
			app.name, app.title, app.icon, app.url, app.sideboxwidth, legacyApp);

		//Create a sidebox menu entry for each application
		if (!app.noNavbar)
		{
			appData.sidemenuEntry = this.sidemenuUi.addEntry(
				appData.displayName, appData.icon,
				this.applicationClickCallback, appData);
		}

		//If this entry is the default entry, show it using the click callback
		if (app.isDefault && (app.isDefault === true))
		{
			defaultApp = appData;
		}

		this.applications[appData.appName] = appData;
	}

	// check if a menuaction or app is specified in the url --> display that
	var _app = this.parseAppFromUrl(window.location.href);
	if (_app)
	{
		_url = window.location.href.replace(/&?cd=yes/,'');
		this.applicationTabNavigate(_app, _url);
	}
	// else display the default application
	else if (defaultApp)
	{
		this.applicationTabNavigate(defaultApp);
	}

	this.scrollAreaUi.update();
}

/**
 * loadApplications refreshes the list of applications. Upon calling, all existing applications
 * will be deleted from the list, and all open tabs will be closed. Then an AJAX request to the
 * given URL will be send in order to obtain the application list with JSON encoding.
 *
 * @param string _menuaction specifies the menuaction
 */
egw_fw.prototype.loadApplications = function(_menuaction)
{
	//Close all open tabs, remove all applications from the application list
	this.sidemenuUi.clean();
	this.tabsUi.clean();

	//Perform an AJAX request loading all available applications
	var req = new egw_json_request(_menuaction)
	req.sendRequest(true, this.loadApplicationsCallback, this);
}

/**
 * Goes through all applications and returns the application with the specified name.
 * @param string _name the name of the application which should be returned.
 * @return object or null if application is not found.
 */
egw_fw.prototype.getApplicationByName = function(_name)
{
	if (typeof this.applications[_name] != 'undefined')
	{
		return this.applications[_name];
	}

	return null;
}

/**
 * Sends sidemenu entry category open/close information to the server using an AJAX request
 */
egw_fw.prototype.categoryOpenCloseCallback = function(_opened)
{
	// switched off, 'til we start using it
	//var req = new egw_json_request("home.jdots_framework.ajax_sidebox_menu_opened",
	//	[this.tag.appName, this.catName, _opened]);
	//req.sendRequest(true);

	/* Store the state of the category lokaly */	
	this.tag.parentFw.categoryOpenCache[this.tag.appName + '#' + this.catName] = _opened;
//	this.tag.parentFw.scrollAreaUi.update();
}

egw_fw.prototype.categoryAnimationCallback = function()
{
	this.tag.parentFw.scrollAreaUi.update();
}

/**
 * Sets the sidebox data of an application
 * @param object _app the application whose sidebox content should be set.
 * @param object _data an array/object containing the data of the sidebox content
 * @param string _md5 an md5 hash of the sidebox menu content: Only if this hash differs between two setSidebox calles, the sidebox menu will be updated.
 */
egw_fw.prototype.setSidebox = function(_app, _data, _md5)
{
	if ((_app != null) && (_app.sidebox_md5 != _md5) && (_app.sidemenuEntry != null))
	{
		//Parse the sidebox data
		if (_data != null)
		{
			var contDiv = document.createElement('div');
			var contJS = ''; //new Array();
			for (var i = 0; i < _data.length; i++)
			{
				var catContent = '';
				for (var j = 0; j < _data[i].entries.length; j++)
				{
					/* As jquery executes all script tags which are found inside
					   the html and removes them afterwards, we have to seperate the
					   javaScript from the html in lang_item and add it manually. */
					html = new Object();
					html.html = _data[i].entries[j].lang_item;
					html.js = '';

					egw_seperateJavaScript(html);
					contJS += html.js;//contJS.concat(html.js);

					if (_data[i].entries[j].icon_or_star)
					{
						catContent += '<div class="egw_fw_ui_sidemenu_listitem"><img class="egw_fw_ui_sidemenu_listitem_icon" src="' + _data[i].entries[j].icon_or_star + '" />';
					}
					if (_data[i].entries[j].item_link == '')
					{
						catContent += html.html;
					}
					else
					{					
						catContent += '<a href="' + _data[i].entries[j].item_link + 
							(_data[i].entries[j].target ? '" target="'+_data[i].entries[j].target : '') +
							'">' + html.html + '</a>';
					}
					if (_data[i].entries[j].icon_or_star)
					{
						catContent += '</div>';
					}										
				}

				/* Append the category content */
				if (catContent != '')
				{
					var categoryUi = new egw_fw_ui_category(contDiv,_data[i].menu_name,
						_data[i].title, catContent, this.categoryOpenCloseCallback, 
						this.categoryAnimationCallback, _app);

					//Lookup whether this entry was opened before. If no data is
					//stored about this, use the information we got from the server
					var opened = this.categoryOpenCache[
						_app.appName + '#' + _data[i].menu_name];
					if (typeof opened == 'undefined')
					{
						opened = _data[i].opened;
					}


					if (opened)
					{
						categoryUi.open(true);
					}
				}
			}

			//Rewrite all form actions if they contain some javascript
			var forms = $('form', contDiv).toArray();
			for (var i = 0; i < forms.length; ++i)
			{
				var form = forms[i];
				if (form.action.indexOf('javascript:') == 0)
				{
					var action = form.action.match(/\('([^']*)/)[0].substr(2);
					form.action = action;
					form.target = this.parseAppFromUrl(action).appName;
				}
			}

			_app.sidemenuEntry.setContent(contDiv);
			_app.sidebox_md5 = _md5;

			$(contDiv).append(contJS);
		}

		_app.hasSideboxMenuContent = true;
		_app.sidemenuEntry.parent.open(_app.sidemenuEntry);

		_app.parentFw.scrollAreaUi.update();
		_app.parentFw.scrollAreaUi.setScrollPos(0);
	}
}

/**
 * Sets the website title of an application
 * @param object _app the application whose title should be set.
 * @param string _title title to set
 */
egw_fw.prototype.setWebsiteTitle = function(_app,_title)
{
	document.title = _title;
	if (_app) _app.website_title = _title;
}

/**
 * Change timezone and refresh current app
 * @param _tz
 */
egw_fw.prototype.tzSelection = function(_tz)
{
	//Perform an AJAX request to tell server
	var req = new egw_json_request('home.jdots_framework.ajax_tz_selection.template',[_tz]);
	req.sendRequest(false);		// false = synchron
	
	if (this.activeApp.browser)
	{
		this.activeApp.browser.relode();
	}
}

egw_fw.prototype.linkHandler = function(_link, _app, _useIframe, _linkSource)
{
	//Determine the app string from the application parameter
	var app = null;
	if (_app && typeof _app == 'string')
	{
		app = this.getApplicationByName(_app);
	}

	if (!app)
	{
		//The app parameter was false or not a string or the application specified did not exists.
		//Determine the target application from the link that had been passed to this function 
		app = this.parseAppFromUrl(_link);		
	}

	if (app)
	{
		this.applicationTabNavigate(app, _link);
	}
	else
	{
		//Display some error messages to have visible feedback
		if (typeof _app == 'string')
		{
			egw_alertHandler('Application "' + _app + '" not found.',
				'The application "' + _app + '" the link "' + _link + '" points to is not registered.');
		}
		else
		{
			egw_alertHandler("No appropriate target application has been found.", 
				"Target link: " + _link);
		}
	}
}

egw_fw.prototype.egw_openWindowCentered2 = function(_url, _windowName, _width, _height, _status, _app, _returnID)
{
	if (typeof _returnID == 'undefined') _returnID = false;
	windowWidth = egw_getWindowOuterWidth();
	windowHeight = egw_getWindowOuterHeight();

	positionLeft = (windowWidth/2)-(_width/2)+egw_getWindowLeft();
	positionTop  = (windowHeight/2)-(_height/2)+egw_getWindowTop();

	//Determine the window the popup should be opened in - normally this is the iframe of the currently active application	
	var parentWindow = window;
	var navigate = false;
	if (typeof _app != 'undefined' && _app !== false)
	{
		var appEntry = framework.getApplicationByName(_app);
		if (appEntry && appEntry.browser == null)
		{
			navigate = true;
			framework.applicationTabNavigate(appEntry, 'about:blank', appEntry.legacyApp);
		}
	}
	else
	{
		var appEntry = framework.activeApp;
	}

	if (appEntry != null && appEntry.browser.iframe != null)
		parentWindow = appEntry.browser.iframe.contentWindow;

	windowID = parentWindow.open(_url, _windowName, "width=" + _width + ",height=" + _height +
		",screenX=" + positionLeft + ",left=" + positionLeft + ",screenY=" + positionTop + ",top=" + positionTop +
		",location=no,menubar=no,directories=no,toolbar=no,scrollbars=yes,resizable=yes,status="+_status);

	if (navigate)
	{
		window.setTimeout("framework.applicationTabNavigate(framework.activeApp, framework.activeApp.indexUrl);", 500);
	}

	if (_returnID === false)
	{
		// return nothing
	}
	else
	{
		return windowID;
	}
}

egw_fw.prototype.egw_appWindow = function(_app)
{
	var app = framework.getApplicationByName(_app);
	var result = null;
	if (app != null && app.browser != null && app.browser.iframe != null)
	{
		result = app.browser.iframe.contentWindow;
	}
	return result;
}

/**
 * egw_fw_content_browser class
 */

EGW_BROWSER_TYPE_NONE = 0;
EGW_BROWSER_TYPE_IFRAME = 1;
EGW_BROWSER_TYPE_DIV = 2;

/**
 * Creates a new content browser ui, _heightCallback must either be a function
 * or an egw_fw_class_callback object.
 */
function egw_fw_content_browser(_app, _heightCallback)
{
	//Create a div which contains both, the legacy iframe and the contentDiv
	this.baseDiv = document.createElement('div');
	this.type = EGW_BROWSER_TYPE_NONE;
	this.iframe = null;
	this.contentDiv = null;
	this.heightCallback = _heightCallback;
	this.app = _app;
}

/**
 * Resizes both, the contentDiv and the iframe to the size returned from the heightCallback
 */
egw_fw_content_browser.prototype.resize = function()
{
	var height = this.heightCallback.call() + 'px';

	//Set the height of the content div or the iframe
	if (this.contentDiv)
	{
		this.contentDiv.style.height = height;
	}
	if (this.iframe)
	{
		this.iframe.style.height = height;
	}
}

egw_fw_content_browser.prototype.setBrowserType = function(_type)
{
	//Only do anything if the browser type has changed
	if (_type != this.type)
	{
		//Destroy the iframe and/or the contentDiv
		$(this.baseDiv).empty();
		this.iframe = null;
		this.contentDiv = null;
		this.ajaxLoaderDiv = null;
		
		switch (_type)
		{
			//Create the div for displaying the content
			case EGW_BROWSER_TYPE_DIV:
				this.contentDiv = document.createElement('div');
				$(this.contentDiv).addClass('egw_fw_content_browser_div');
				$(this.baseDiv).append(this.contentDiv);
				
				break;
			
			case EGW_BROWSER_TYPE_IFRAME:
				//Create the iframe
				this.iframe = document.createElement('iframe');
				this.iframe.style.width = "100%";
				this.iframe.style.borderWidth = 0;
				this.iframe.frameBorder = 0;
				this.iframe.name = this.app.appName;
				$(this.iframe).addClass('egw_fw_content_browser_iframe');
				$(this.baseDiv).append(this.iframe);

				break;
		}

		this.resize();
		this.type = _type;
	}
}

egw_fw_content_browser.prototype.browse = function(_url, _useIframe)
{
	//Set the browser type
	if (_useIframe)
	{
		this.setBrowserType(EGW_BROWSER_TYPE_IFRAME);

		//Perform the actual "navigation"
		this.iframe.src = _url;

		//Set the "_legacy_iframe" flag to allow link handlers to easily determine
		//the type of the link source
		this.iframe.contentWindow._legacy_iframe = true;		
	}
	else
	{
		this.setBrowserType(EGW_BROWSER_TYPE_DIV)

		//Special treatement of "about:blank"
		if (_url == "about:blank")
		{
			$(this.contentDiv).empty();
		}
		else
		{
			//Perform an AJAX request loading application output
			if (this.app.sidemenuEntry)
				this.app.sidemenuEntry.showAjaxLoader();
			var req = new egw_json_request(
				this.app.appName + '.jdots_framework.ajax_exec',
				[_url], this.contentDiv);
			req.sendRequest(true, this.browse_callback, this);
		}
	}
}

egw_fw_content_browser.prototype.browse_callback = function(_data)
{
	if (this.app.sidemenuEntry)
		this.app.sidemenuEntry.hideAjaxLoader();
	$(this.contentDiv).empty();
	$(this.contentDiv).append(_data);
//	console.log(_data);
}

egw_fw_content_browser.prototype.reload = function()
{
	switch (_type)
	{
		case EGW_BROWSER_TYPE_DIV:

			break;

		case EGW_BROWSER_TYPE_IFRAME:
			//Do a simple reload in the iframe case
			this.iframe.contentWindow.location.reload();
			break;
	}
}

egw_fw_content_browser.prototype.blank = function()
{
	this.browse('about:blank', this.type = EGW_BROWSER_TYPE_IFRAME);
}

/**
 * Global funcitons
 */

window.egw_link_handler = function(_link, _app)
{
	//Determine where the link came from
	var link_source = EGW_LINK_SOURCE_FRAMEWORK;
	if (window.framework == 'undefined')
	{
		if (typeof window._legacy_iframe != 'undefined')
		{
			var link_source = EGW_LINK_SOURCE_LEGACY_IFRAME //1, iframe ==> legacy application
		}
		else
		{
			var link_source = EGW_LINK_SOURCE_POPUP; //2, popup
		}
	}

	//Default the application parameter to false
	if (typeof _app == 'undefined')
	{
		_app = false;
	}

	//Default the _useIframe parameter to true
	if (typeof _useIframe == 'undefined')
	{
		_useIframe = true;
	}

	var frmwrk = getFramework();
	if (frmwrk != null)
	{
		frmwrk.linkHandler(_link, _app, link_source)
	}
	else
	{
		window.location = _link;
	}
}

window.getFramework = function()
{
	if (typeof window.framework != 'undefined')
	{
		return framework;
	}
	else if (typeof window.parent.getFramework != "undefined")
	{
		return window.parent.getFramework();
	}
	else
	{
		return null;
	}
}