/*
	Copyright (c) 2004-2008, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/book/dojo-book-0-9/introduction/licensing
*/


/*=====
dojo.isBrowser = {
	//	example:
	//	|	if(dojo.isBrowser){ ... }
};

dojo.isFF = {
	//	example:
	//	|	if(dojo.isFF > 1){ ... }
};

dojo.isIE = {
	// example:
	//	|	if(dojo.isIE > 6){
	//	|		// we are IE7
	// 	|	}
};

dojo.isSafari = {
	//	example:
	//	|	if(dojo.isSafari){ ... }
	//	example: 
	//		Detect iPhone:
	//	|	if(dojo.isSafari && (navigator.userAgent.indexOf("iPhone") < 0)){ 
	//	|		// we are iPhone. iPod touch reports "iPod" above
	//	|	}
};

dojo = {
	// isBrowser: Boolean
	//		True if the client is a web-browser
	isBrowser: true,
	//	isFF: Number
	//		Greater than zero if client is FireFox. 0 otherwise. Corresponds to
	//		major detected FireFox version (1.5, 2, 3, etc.)
	isFF: 2,
	//	isIE: Number
	//		Greater than zero if client is MSIE(PC). 0 otherwise. Corresponds to
	//		major detected IE version (6, 7, 8, etc.)
	isIE: 6,
	//	isKhtml: Number
	//		Greater than zero if client is a KTHML-derived browser (Konqueror,
	//		Safari, etc.). 0 otherwise. Corresponds to major detected version.
	isKhtml: 0,
	//	isMozilla: Number
	//		Greater than zero if client is a Mozilla-based browser (Firefox,
	//		SeaMonkey). 0 otherwise. Corresponds to major detected version.
	isMozilla: 0,
	//	isOpera: Number
	//		Greater than zero if client is Opera. 0 otherwise. Corresponds to
	//		major detected version.
	isOpera: 0,
	//	isSafari: Number
	//		Greater than zero if client is Safari or iPhone. 0 otherwise.
	isSafari: 0
}
=====*/

if(typeof window != 'undefined'){
	dojo.isBrowser = true;
	dojo._name = "browser";


	// attempt to figure out the path to dojo if it isn't set in the config
	(function(){
		var d = dojo;
		// this is a scope protection closure. We set browser versions and grab
		// the URL we were loaded from here.

		// grab the node we were loaded from
		if(document && document.getElementsByTagName){
			var scripts = document.getElementsByTagName("script");
			var rePkg = /dojo(\.xd)?\.js(\W|$)/i;
			for(var i = 0; i < scripts.length; i++){
				var src = scripts[i].getAttribute("src");
				if(!src){ continue; }
				var m = src.match(rePkg);
				if(m){
					// find out where we came from
					if(!d.config.baseUrl){
						d.config.baseUrl = src.substring(0, m.index);
					}
					// and find out if we need to modify our behavior
					var cfg = scripts[i].getAttribute("djConfig");
					if(cfg){
						var cfgo = eval("({ "+cfg+" })");
						for(var x in cfgo){
							dojo.config[x] = cfgo[x];
						}
					}
					break; // "first Dojo wins"
				}
			}
		}
		d.baseUrl = d.config.baseUrl;

		// fill in the rendering support information in dojo.render.*
		var n = navigator;
		var dua = n.userAgent;
		var dav = n.appVersion;
		var tv = parseFloat(dav);

		d.isOpera = (dua.indexOf("Opera") >= 0) ? tv : 0;
		// safari detection derived from:
		//		http://developer.apple.com/internet/safari/faq.html#anchor2
		//		http://developer.apple.com/internet/safari/uamatrix.html
		var idx = Math.max(dav.indexOf("WebKit"), dav.indexOf("Safari"), 0);
		if(idx){
			// try to grab the explicit Safari version first. If we don't get
			// one, look for 419.3+ as the indication that we're on something
			// "Safari 3-ish". Lastly, default to "Safari 2" handling.
			d.isSafari = parseFloat(dav.split("Version/")[1]) || ( ( parseFloat(dav.substr(idx+7)) >= 419.3 ) ? 3 : 2 ) || 2;
		}
		d.isAIR = (dua.indexOf("AdobeAIR") >= 0) ? 1 : 0;
		d.isKhtml = (dav.indexOf("Konqueror") >= 0 || d.isSafari) ? tv : 0;
		d.isMozilla = d.isMoz = (dua.indexOf("Gecko") >= 0 && !d.isKhtml) ? tv : 0;
		d.isFF = d.isIE = 0;
		if(d.isMoz){
			d.isFF = parseFloat(dua.split("Firefox/")[1]) || 0;
		}
		if(document.all && !d.isOpera){
			d.isIE = parseFloat(dav.split("MSIE ")[1]) || 0;
		}

		//Workaround to get local file loads of dojo to work on IE 7
		//by forcing to not use native xhr.
		if(dojo.isIE && window.location.protocol === "file:"){
			dojo.config.ieForceActiveXXhr=true;
		}

		var cm = document.compatMode;
		d.isQuirks = cm == "BackCompat" || cm == "QuirksMode" || d.isIE < 6;

		// TODO: is the HTML LANG attribute relevant?
		d.locale = dojo.config.locale || (d.isIE ? n.userLanguage : n.language).toLowerCase();

		// These are in order of decreasing likelihood; this will change in time.
		d._XMLHTTP_PROGIDS = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'];

		d._xhrObj = function(){
			// summary: 
			//		does the work of portably generating a new XMLHTTPRequest
			//		object.
			var http = null;
			var last_e = null;
			if(!dojo.isIE || !dojo.config.ieForceActiveXXhr){
				try{ http = new XMLHttpRequest(); }catch(e){}
			}
			if(!http){
				for(var i=0; i<3; ++i){
					var progid = d._XMLHTTP_PROGIDS[i];
					try{
						http = new ActiveXObject(progid);
					}catch(e){
						last_e = e;
					}

					if(http){
						d._XMLHTTP_PROGIDS = [progid];  // so faster next time
						break;
					}
				}
			}

			if(!http){
				throw new Error("XMLHTTP not available: "+last_e);
			}

			return http; // XMLHTTPRequest instance
		}

		d._isDocumentOk = function(http){
			var stat = http.status || 0;
			return (stat >= 200 && stat < 300) || 	// Boolean
				stat == 304 || 						// allow any 2XX response code
				stat == 1223 || 						// get it out of the cache
				(!stat && (location.protocol=="file:" || location.protocol=="chrome:") ); // Internet Explorer mangled the status code
		}

		//See if base tag is in use.
		//This is to fix http://trac.dojotoolkit.org/ticket/3973,
		//but really, we need to find out how to get rid of the dojo._Url reference
		//below and still have DOH work with the dojo.i18n test following some other
		//test that uses the test frame to load a document (trac #2757).
		//Opera still has problems, but perhaps a larger issue of base tag support
		//with XHR requests (hasBase is true, but the request is still made to document
		//path, not base path).
		var owloc = window.location+"";
		var base = document.getElementsByTagName("base");
		var hasBase = (base && base.length > 0);

		d._getText = function(/*URI*/ uri, /*Boolean*/ fail_ok){
			// summary: Read the contents of the specified uri and return those contents.
			// uri:
			//		A relative or absolute uri. If absolute, it still must be in
			//		the same "domain" as we are.
			// fail_ok:
			//		Default false. If fail_ok and loading fails, return null
			//		instead of throwing.
			// returns: The response text. null is returned when there is a
			//		failure and failure is okay (an exception otherwise)

			// alert("_getText: " + uri);

			// NOTE: must be declared before scope switches ie. this._xhrObj()
			var http = this._xhrObj();

			if(!hasBase && dojo._Url){
				uri = (new dojo._Url(owloc, uri)).toString();
			}
			/*
			console.debug("_getText:", uri);
			console.debug(window.location+"");
			alert(uri);
			*/

			if(d.config.cacheBust){
				uri += (uri.indexOf("?") == -1 ? "?" : "&") + String(d.config.cacheBust).replace(/\W+/g,"");
			}

			http.open('GET', uri, false);
			try{
				http.send(null);
				// alert(http);
				if(!d._isDocumentOk(http)){
					var err = Error("Unable to load "+uri+" status:"+ http.status);
					err.status = http.status;
					err.responseText = http.responseText;
					throw err;
				}
			}catch(e){
				if(fail_ok){ return null; } // null
				// rethrow the exception
				throw e;
			}
			return http.responseText; // String
		}
	})();

	dojo._initFired = false;
	//	BEGIN DOMContentLoaded, from Dean Edwards (http://dean.edwards.name/weblog/2006/06/again/)
	dojo._loadInit = function(e){
		dojo._initFired = true;
		// allow multiple calls, only first one will take effect
		// A bug in khtml calls events callbacks for document for event which isnt supported
		// for example a created contextmenu event calls DOMContentLoaded, workaround
		var type = (e && e.type) ? e.type.toLowerCase() : "load";
		if(arguments.callee.initialized || (type != "domcontentloaded" && type != "load")){ return; }
		arguments.callee.initialized = true;
		if("_khtmlTimer" in dojo){
			clearInterval(dojo._khtmlTimer);
			delete dojo._khtmlTimer;
		}

		if(dojo._inFlightCount == 0){
			dojo._modulesLoaded();
		}
	}

	dojo._fakeLoadInit = function(){
		dojo._loadInit({type: "load"});
	}

	if(dojo.config.afterOnLoad){
		//Dojo is being added to the page after page load, so just trigger
		//the init sequence after a timeout. Using a timeout so the rest of this
		//script gets evaluated properly.
		window.setTimeout(dojo._fakeLoadInit, 1000);
	}else{
		//	START DOMContentLoaded
		// Mozilla and Opera 9 expose the event we could use
		if(document.addEventListener){
			// NOTE: 
			//		due to a threading issue in Firefox 2.0, we can't enable
			//		DOMContentLoaded on that platform. For more information, see:
			//		http://trac.dojotoolkit.org/ticket/1704
			if(dojo.isOpera || dojo.isFF >= 3 || (dojo.isMoz && dojo.config.enableMozDomContentLoaded === true)){
				document.addEventListener("DOMContentLoaded", dojo._loadInit, null);
			}
	
			//	mainly for Opera 8.5, won't be fired if DOMContentLoaded fired already.
			//  also used for Mozilla because of trac #1640
			window.addEventListener("load", dojo._loadInit, null);
		}
	
		if(dojo.isAIR){
			window.addEventListener("load", dojo._loadInit, null);
		}else if(/(WebKit|khtml)/i.test(navigator.userAgent)){ // sniff
			dojo._khtmlTimer = setInterval(function(){
				if(/loaded|complete/.test(document.readyState)){
					dojo._loadInit(); // call the onload handler
				}
			}, 10);
		}
		//	END DOMContentLoaded
	}

	(function(){
		var _w = window;
		var _handleNodeEvent = function(/*String*/evtName, /*Function*/fp){
			// summary:
			//		non-destructively adds the specified function to the node's
			//		evtName handler.
			// evtName: should be in the form "onclick" for "onclick" handlers.
			// Make sure you pass in the "on" part.
			var oldHandler = _w[evtName] || function(){};
			_w[evtName] = function(){
				fp.apply(_w, arguments);
				oldHandler.apply(_w, arguments);
			};
		};

		if(dojo.isIE){
			// 	for Internet Explorer. readyState will not be achieved on init
			// 	call, but dojo doesn't need it however, we'll include it
			// 	because we don't know if there are other functions added that
			// 	might.  Note that this has changed because the build process
			// 	strips all comments -- including conditional ones.
			if(!dojo.config.afterOnLoad){
				document.write('<scr'+'ipt defer src="//:" '
					+ 'onreadystatechange="if(this.readyState==\'complete\'){' + dojo._scopeName + '._loadInit();}">'
					+ '</scr'+'ipt>'
				);
			}

			// IE WebControl hosted in an application can fire "beforeunload" and "unload"
			// events when control visibility changes, causing Dojo to unload too soon. The
			// following code fixes the problem
			// Reference: http://support.microsoft.com/default.aspx?scid=kb;en-us;199155
			var _unloading = true;
			_handleNodeEvent("onbeforeunload", function(){
				_w.setTimeout(function(){ _unloading = false; }, 0);
			});
			_handleNodeEvent("onunload", function(){
				if(_unloading){ dojo.unloaded(); }
			});

			try{
				document.namespaces.add("v","urn:schemas-microsoft-com:vml");
				document.createStyleSheet().addRule("v\\:*", "behavior:url(#default#VML)");
			}catch(e){}
		}else{
			// FIXME: dojo.unloaded requires dojo scope, so using anon function wrapper.
			_handleNodeEvent("onbeforeunload", function() { dojo.unloaded(); });
		}

	})();

	/*
	OpenAjax.subscribe("OpenAjax", "onload", function(){
		if(dojo._inFlightCount == 0){
			dojo._modulesLoaded();
		}
	});

	OpenAjax.subscribe("OpenAjax", "onunload", function(){
		dojo.unloaded();
	});
	*/
} //if (typeof window != 'undefined')

//Register any module paths set up in djConfig. Need to do this
//in the hostenvs since hostenv_browser can read djConfig from a
//script tag's attribute.
(function(){
	var mp = dojo.config["modulePaths"];
	if(mp){
		for(var param in mp){
			dojo.registerModulePath(param, mp[param]);
		}
	}
})();

//Load debug code if necessary.
if(dojo.config.isDebug){
	dojo.require("dojo._firebug.firebug");
}

if(dojo.config.debugAtAllCosts){
	dojo.config.useXDomain = true;
	dojo.require("dojo._base._loader.loader_xd");
	dojo.require("dojo._base._loader.loader_debug");
	dojo.require("dojo.i18n");
}
