/*
	Copyright (c) 2004-2005, 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/community/licensing.shtml
*/

/**
* @file hostenv_browser.js
*
* Implements the hostenv interface for a browser environment. 
*
* Perhaps it could be called a "dom" or "useragent" environment.
*
* @author Copyright 2004 Mark D. Anderson (mda@discerning.com)
* @author Licensed under the Academic Free License 2.1 http://www.opensource.org/licenses/afl-2.1.php
*/

// make jsc shut up (so we can use jsc to sanity check the code even if it will never run it).
/*@cc_on
@if (@_jscript_version >= 7)
var window; var XMLHttpRequest;
@end
@*/

if(typeof window == 'undefined'){
	dojo.raise("no window object");
}

// attempt to figure out the path to dojo if it isn't set in the config
(function() {
	// before we get any further with the config options, try to pick them out
	// of the URL. Most of this code is from NW
	if(djConfig.allowQueryConfig){
		var baseUrl = document.location.toString(); // FIXME: use location.query instead?
		var params = baseUrl.split("?", 2);
		if(params.length > 1){
			var paramStr = params[1];
			var pairs = paramStr.split("&");
			for(var x in pairs){
				var sp = pairs[x].split("=");
				// FIXME: is this eval dangerous?
				if((sp[0].length > 9)&&(sp[0].substr(0, 9) == "djConfig.")){
					var opt = sp[0].substr(9);
					try{
						djConfig[opt]=eval(sp[1]);
					}catch(e){
						djConfig[opt]=sp[1];
					}
				}
			}
		}
	}

	if(((djConfig["baseScriptUri"] == "")||(djConfig["baseRelativePath"] == "")) &&(document && document.getElementsByTagName)){
		var scripts = document.getElementsByTagName("script");
		var rePkg = /(__package__|dojo)\.js(\?|$)/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) {
				root = src.substring(0, m.index);
				if(!this["djConfig"]) { djConfig = {}; }
				if(djConfig["baseScriptUri"] == "") { djConfig["baseScriptUri"] = root; }
				if(djConfig["baseRelativePath"] == "") { djConfig["baseRelativePath"] = root; }
				break;
			}
		}
	}

	var dr = dojo.render;
	var drh = dojo.render.html;
	var dua = drh.UA = navigator.userAgent;
	var dav = drh.AV = navigator.appVersion;
	var t = true;
	var f = false;
	drh.capable = t;
	drh.support.builtin = t;

	dr.ver = parseFloat(drh.AV);
	dr.os.mac = dav.indexOf("Macintosh") >= 0;
	dr.os.win = dav.indexOf("Windows") >= 0;
	// could also be Solaris or something, but it's the same browser
	dr.os.linux = dav.indexOf("X11") >= 0;

	drh.opera = dua.indexOf("Opera") >= 0;
	drh.khtml = (dav.indexOf("Konqueror") >= 0)||(dav.indexOf("Safari") >= 0);
	drh.safari = dav.indexOf("Safari") >= 0;
	var geckoPos = dua.indexOf("Gecko");
	drh.mozilla = drh.moz = (geckoPos >= 0)&&(!drh.khtml);
	if (drh.mozilla) {
		// gecko version is YYYYMMDD
		drh.geckoVersion = dua.substring(geckoPos + 6, geckoPos + 14);
	}
	drh.ie = (document.all)&&(!drh.opera);
	drh.ie50 = drh.ie && dav.indexOf("MSIE 5.0")>=0;
	drh.ie55 = drh.ie && dav.indexOf("MSIE 5.5")>=0;
	drh.ie60 = drh.ie && dav.indexOf("MSIE 6.0")>=0;

	dr.vml.capable=drh.ie;
	dr.svg.capable = f;
	dr.svg.support.plugin = f;
	dr.svg.support.builtin = f;
	dr.svg.adobe = f;
	if (document.implementation 
		&& document.implementation.hasFeature
		&& document.implementation.hasFeature("org.w3c.dom.svg", "1.0")
	){
		dr.svg.capable = t;
		dr.svg.support.builtin = t;
		dr.svg.support.plugin = f;
		dr.svg.adobe = f;
	}else{ 
		//	check for ASVG
		if(navigator.mimeTypes && navigator.mimeTypes.length > 0){
			var result = navigator.mimeTypes["image/svg+xml"] ||
				navigator.mimeTypes["image/svg"] ||
				navigator.mimeTypes["image/svg-xml"];
			if (result){
				dr.svg.adobe = result && result.enabledPlugin &&
					result.enabledPlugin.description && 
					(result.enabledPlugin.description.indexOf("Adobe") > -1);
				if(dr.svg.adobe) {
					dr.svg.capable = t;
					dr.svg.support.plugin = t;
				}
			}
		}else if(drh.ie && dr.os.win){
			var result = f;
			try {
				var test = new ActiveXObject("Adobe.SVGCtl");
				result = t;
			} catch(e){}
			if (result){
				dr.svg.capable = t;
				dr.svg.support.plugin = t;
				dr.svg.adobe = t;
			}
		}else{
			dr.svg.capable = f;
			dr.svg.support.plugin = f;
			dr.svg.adobe = f;
		}
	}
})();

dojo.hostenv.startPackage("dojo.hostenv");

dojo.hostenv.name_ = 'browser';
dojo.hostenv.searchIds = [];

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

dojo.hostenv.getXmlhttpObject = function(){
    var http = null;
	var last_e = null;
	try{ http = new XMLHttpRequest(); }catch(e){}
    if(!http){
		for(var i=0; i<3; ++i){
			var progid = DJ_XMLHTTP_PROGIDS[i];
			try{
				http = new ActiveXObject(progid);
			}catch(e){
				last_e = e;
			}

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

		/*if(http && !http.toString) {
			http.toString = function() { "[object XMLHttpRequest]"; }
		}*/
	}

	if(!http){
		return dojo.raise("XMLHTTP not available", last_e);
	}

	return http;
}

/**
 * Read the contents of the specified uri and return those contents.
 *
 * @param uri A relative or absolute uri. If absolute, it still must be in the
 * same "domain" as we are.
 *
 * @param async_cb If not specified, load synchronously. If specified, load
 * asynchronously, and use async_cb as the progress handler which takes the
 * xmlhttp object as its argument. If async_cb, this function returns null.
 *
 * @param fail_ok Default false. If fail_ok and !async_cb and loading fails,
 * return null instead of throwing.
 */ 
dojo.hostenv.getText = function(uri, async_cb, fail_ok){
	
	var http = this.getXmlhttpObject();

	if(async_cb){
		http.onreadystatechange = function(){ 
			if((4==http.readyState)&&(http["status"])){
				if(http.status==200){
					dojo.debug("LOADED URI: "+uri);
					async_cb(http.responseText);
				}
			}
		}
	}

	http.open('GET', uri, async_cb ? true : false);
	http.send(null);
	if(async_cb){
		return null;
	}
	
	return http.responseText;
}

/*
 * It turns out that if we check *right now*, as this script file is being loaded,
 * then the last script element in the window DOM is ourselves.
 * That is because any subsequent script elements haven't shown up in the document
 * object yet.
 */
 /*
function dj_last_script_src() {
    var scripts = window.document.getElementsByTagName('script');
    if(scripts.length < 1){ 
		dojo.raise("No script elements in window.document, so can't figure out my script src"); 
	}
    var script = scripts[scripts.length - 1];
    var src = script.src;
    if(!src){
		dojo.raise("Last script element (out of " + scripts.length + ") has no src");
	}
    return src;
}

if(!dojo.hostenv["library_script_uri_"]){
	dojo.hostenv.library_script_uri_ = dj_last_script_src();
}
*/

dojo.hostenv.defaultDebugContainerId = 'dojoDebug';
dojo.hostenv._println_buffer = [];
dojo.hostenv._println_safe = false;
dojo.hostenv.println = function (line){
	if(!dojo.hostenv._println_safe){
		dojo.hostenv._println_buffer.push(line);
	}else{
		try {
			var console = document.getElementById(djConfig.debugContainerId ?
				djConfig.debugContainerId : dojo.hostenv.defaultDebugContainerId);
			if(!console) { console = document.getElementsByTagName("body")[0] || document.body; }

			var div = document.createElement("div");
			div.appendChild(document.createTextNode(line));
			console.appendChild(div);
		} catch (e) {
			try{
				// safari needs the output wrapped in an element for some reason
				document.write("<div>" + line + "</div>");
			}catch(e2){
				window.status = line;
			}
		}
	}
}

dojo.addOnLoad(function(){
	dojo.hostenv._println_safe = true;
	while(dojo.hostenv._println_buffer.length > 0){
		dojo.hostenv.println(dojo.hostenv._println_buffer.shift());
	}
});

function dj_addNodeEvtHdlr (node, evtName, fp, capture){
	var oldHandler = node["on"+evtName] || function(){};
	node["on"+evtName] = function(){
		fp.apply(node, arguments);
		oldHandler.apply(node, arguments);
	}
	return true;
}

dj_addNodeEvtHdlr(window, "load", function(){
	if(dojo.render.html.ie){
		dojo.hostenv.makeWidgets();
	}
	dojo.hostenv.modulesLoaded();
});

dojo.hostenv.makeWidgets = function(){
	// you can put searchIds in djConfig and dojo.hostenv at the moment
	// we should probably eventually move to one or the other
	var sids = [];
	if(djConfig.searchIds && djConfig.searchIds.length > 0) {
		sids = sids.concat(djConfig.searchIds);
	}
	if(dojo.hostenv.searchIds && dojo.hostenv.searchIds.length > 0) {
		sids = sids.concat(dojo.hostenv.searchIds);
	}

	if((djConfig.parseWidgets)||(sids.length > 0)){
		if(dojo.evalObjPath("dojo.widget.Parse")){
			// we must do this on a delay to avoid:
			//	http://www.shaftek.org/blog/archives/000212.html
			// IE is such a tremendous peice of shit.
			try{
				var parser = new dojo.xml.Parse();
				if(sids.length > 0){
					for(var x=0; x<sids.length; x++){
						var tmpNode = document.getElementById(sids[x]);
						if(!tmpNode){ continue; }
						var frag = parser.parseElement(tmpNode, null, true);
						dojo.widget.getParser().createComponents(frag);
					}
				}else if(djConfig.parseWidgets){
					var frag  = parser.parseElement(document.getElementsByTagName("body")[0] || document.body, null, true);
					dojo.widget.getParser().createComponents(frag);
				}
			}catch(e){
				dojo.debug("auto-build-widgets error:", e);
			}
		}
	}
}

dojo.hostenv.modulesLoadedListeners.push(function(){
	if(!dojo.render.html.ie) {
		dojo.hostenv.makeWidgets();
	}
});

// we assume that we haven't hit onload yet. Lord help us.
try {
	if (!window["djConfig"] || !window.djConfig["preventBackButtonFix"]){
		document.write("<iframe style='border: 0px; width: 1px; height: 1px; position: absolute; bottom: 0px; right: 0px; visibility: visible;' name='djhistory' id='djhistory' src='"+(dojo.hostenv.getBaseScriptUri()+'iframe_history.html')+"'></iframe>");
	}
	if (dojo.render.html.ie) {
		document.write('<style>v\:*{ behavior:url(#default#VML); }</style>');
		document.write('<xml:namespace ns="urn:schemas-microsoft-com:vml" prefix="v"/>');
	}
} catch (e) { }

// stub, over-ridden by debugging code. This will at least keep us from
// breaking when it's not included
dojo.hostenv.writeIncludes = function(){} 

dojo.hostenv.byId = dojo.byId = function(id, doc){
	if(typeof id == "string" || id instanceof String){
		if(!doc){ doc = document; }
		return doc.getElementById(id);
	}
	return id; // assume it's a node
}

dojo.hostenv.byIdArray = dojo.byIdArray = function(){
	var ids = [];
	for(var i = 0; i < arguments.length; i++){
		if((arguments[i] instanceof Array)||(typeof arguments[i] == "array")){
			for(var j = 0; j < arguments[i].length; j++){
				ids = ids.concat(dojo.hostenv.byIdArray(arguments[i][j]));
			}
		}else{
			ids.push(dojo.hostenv.byId(arguments[i]));
		}
	}
	return ids;
}