// exponent Javascript Support Systems

//EXPERIMENTAL: introduction of a common namespace object
//TODO: migrate all of E`s JS API to this new object
Exponent = new Object();

Exponent.LANG = "eng_US";
Exponent.PATH_RELATIVE = "/";
Exponent.THEME_RELATIVE = "/themes/expertresourcestheme/";
Exponent.ICON_RELATIVE = "/iconset/";

var onLoadInits = new Array(); // array of functions

var openWindows = new Array(); // array of window references.

// Compatibility layer
function pathosJSinitialize() {
	exponentJSinitialize();
}
function pathosJSregister(func) {
	exponentJSregister(func);
}
function pathosGetCookie(name) {
	return exponentGetCookie(name);
}
//End compatibility layer

function exponentJSinitialize() {
	for (i = 0; i < onLoadInits.length; i++) {
		onLoadInits[i]();
	}
}

function exponentJSregister(func) {
	onLoadInits.push(func);
}

var PATH_RELATIVE = "/";
var THEME_RELATIVE = "/themes/expertresourcestheme/";
var ICON_RELATIVE = "/iconset/";


function exponentGetCookie(name) {
	cookiestr = document.cookie;
	var nameIndex = cookiestr.indexOf(name);
	if (nameIndex != -1) { // found the named cookie
		var startOffset = nameIndex+name.length+1;
		var endOffset = cookiestr.indexOf(";",startOffset);
		if (endOffset == -1) endOffset = cookiestr.length;
		return cookiestr.substring(startOffset,endOffset);
	}
	return "";
}

function makeLink() {
	var link = "";
	var link = "";
	var args = makeLink.arguments;
	link = PATH_RELATIVE + "index.html?";
	for (var i = 0; i < args.length; i+=2) {
		var v = args[i+1];
		if (v != null && v != "") {
			link += escape(args[i]) + "=" + escape(args[i+1]) + "&";
		}
	}
	return link.substr(0,link.length - 1);
}

function openWindow(url,name,options) {
	for (key in openWindows) {
		if (key == name) {
			if (openWindows[key].focus()) {
				return;
			} else {
				break;
			}
		}
	}
	openWindows[name] = window.open(url,name,options);
}

function openSelector(mod,dest,vmod,vview) {
	var url = PATH_RELATIVE+"source_selector.php?showmodules="+mod+"&dest="+escape(dest)+"&vmod="+vmod+"&vview="+vview;
	openWindow(url,'sourcePicker','title=no,toolbar=no,width=640,height=480,scrollbars=yes');
}

function openContentSelector(mod,dest,view) {
	var url = PATH_RELATIVE+"content_selector.php?showmodules="+mod+"&dest="+escape(dest)+"&vmod=containermodule&vview="+view;
	openWindow(url,'contentPicker','title=no,toolbar=no,width=640,height=480,scrollbars=yes');
}

function sourceSelected(hidden,showPreview,src,desc) {
	var hidden = document.getElementById(hidden);
	hidden.value = src;
	if (showPreview){
	showPreviewCall();
	}
}

function selectAll(prefix,checked) {
	elems = document.getElementsByTagName("input");
	for (var key in elems) {
		if (elems[key].type == "checkbox" && elems[key].name.substr(0,prefix.length) == prefix) {
			elems[key].checked = checked;
		}
	}
}

function isOneSelected(prefix,enabledOnly) {
	if (typeof enabledOnly == "undefined") {
		enabledOnly = true;
	}
	elems = document.getElementsByTagName("input");
	for (var key in elems) {
		if (elems[key].type == "checkbox" && elems[key].name.substr(0,prefix.length) == prefix) {
			if (enabledOnly && elems[key].checked && !elems[key].disabled) return true;
			if (!enabledOnly && elems[key].checked) return true;
		}
	}
	return false;
}

// Patch the String object, to make string parsing a little easier in exponent
String.prototype.isValid = function (alpha,numeric,others) {
	for (var i = 0; i < this.length; i++) {
		if (alpha && this.isAlpha(i)) continue;
		if (numeric && this.isNumeric(i)) continue;
		var isGood = false;
		for (var j = 0; j < others.length; j++) {
			if (others[j] == this.charAt(i)) {
				isGood = true;
				continue;
			}
		}
		if (!isGood) return false;
	}
	return true;
}

String.prototype.isNumeric = function(index) {
	var charcode = this.charCodeAt(index);
	return (
		(charcode >= 48 && charcode < 48+10)
	);
}

String.prototype.isAlpha = function(index) {	
	var charcode = this.charCodeAt(index);
	return (
		(charcode >= 65 && charcode < 65+26) ||
		(charcode >= 97 && charcode < 97+26)
	);
}

String.prototype.trim = function() {
	str = this;
	while (1) {
		if (str.substring(str.length - 1, str.length) != " ") break;
		str = str.substr(0,str.length - 1);
	}
	while (1 && str.length > 0) {
		if (str.substring(0,1) != " ") break;
		str = str.substr(1,str.length - 1);
	}
	return str;
}