/** 
 *  @fileoverview TextResizeDetector
 * 
 *  Detects changes to font sizes when user changes browser settings
 *
 *  Fires a custom event with the following data:
 *
 *
 * 	iBase  : base font size  	
 *	iDelta : difference in pixels from previous setting<br>
 *  iSize  : size in pixel of text<br>
 *  
 *  
 * @author Lawrence Carvalho carvalho@uk.yahoo-inc.com
 * @version 1.0
 */

/**
 * @constructor
 */
TextResizeDetector = function() { 
    var el  = null;
	var iIntervalDelay  = 200;
	var iInterval = null;
	var iCurrSize = -1;
	var iBase = -1;
 	var aListeners = [];
 	var createControlElement = function() {
	 	el = document.createElement('span');
		el.id='textResizeControl';
		el.innerHTML='&nbsp;';
		el.style.position="absolute";
		el.style.left="-9999px";
		var elC = document.getElementById(TextResizeDetector.TARGET_ELEMENT_ID);
		// insert before firstChild
		if (elC)
			elC.insertBefore(el,elC.firstChild);
		iBase = iCurrSize = TextResizeDetector.getSize();
 	};

 	function _stopDetector() {
		window.clearInterval(iInterval);
		iInterval=null;
	};
	function _startDetector() {
		if (!iInterval) {
			iInterval = window.setInterval('TextResizeDetector.detect()',iIntervalDelay);
		}
	};
 	
 	 function _detect() {
 		var iNewSize = TextResizeDetector.getSize();
		
 		if(iNewSize!== iCurrSize) {
			for (var 	i=0;i <aListeners.length;i++) {
				aListnr = aListeners[i];
				var oArgs = {  iBase: iBase,iDelta:((iCurrSize!=-1) ? iNewSize - iCurrSize + 'px' : "0px"),iSize:iCurrSize = iNewSize};
				if (!aListnr.obj) {
					aListnr.fn('textSizeChanged',[oArgs]);
				}
				else  {
					aListnr.fn.apply(aListnr.obj,['textSizeChanged',[oArgs]]);
				}
			}

 		}
 		return iCurrSize;
 	};
	var onAvailable = function() {
		
		if (!TextResizeDetector.onAvailableCount_i ) {
			TextResizeDetector.onAvailableCount_i =0;
		}

		if (document.getElementById(TextResizeDetector.TARGET_ELEMENT_ID)) {
			TextResizeDetector.init();
			if (TextResizeDetector.USER_INIT_FUNC){
				TextResizeDetector.USER_INIT_FUNC();
			}
			TextResizeDetector.onAvailableCount_i = null;
		}
		else {
			if (TextResizeDetector.onAvailableCount_i<600) {
	  	 	    TextResizeDetector.onAvailableCount_i++;
				setTimeout(onAvailable,200)
			}
		}
	};
	setTimeout(onAvailable,500);

 	return {
		 	/*
		 	 * Initializes the detector
		 	 * 
		 	 * @param {String} sId The id of the element in which to create the control element
		 	 */
		 	init: function() {
		 		
		 		createControlElement();		
				_startDetector();
 			},
			/**
			 * Adds listeners to the ontextsizechange event. 
			 * Returns the base font size
			 * 
			 */
 			addEventListener:function(fn,obj,bScope) {
				aListeners[aListeners.length] = {
					fn: fn,
					obj: obj
				}
				return iBase;
			},
			/**
			 * performs the detection and fires textSizeChanged event
			 * @return the current font size
			 * @type {integer}
			 */
 			detect:function() {
 				return _detect();
 			},
 			/**
 			 * Returns the height of the control element
 			 * 
			 * @return the current height of control element
			 * @type {integer}
 			 */
 			getSize:function() {
	 				var iSize;
			 		return el.offsetHeight;
		 		
		 		
 			},
 			/**
 			 * Stops the detector
 			 */
 			stopDetector:function() {
				return _stopDetector();
			},
			/*
			 * Starts the detector
			 */
 			startDetector:function() {
				return _startDetector();
			}
 	}
 }();

TextResizeDetector.TARGET_ELEMENT_ID = 'doc';
TextResizeDetector.USER_INIT_FUNC = null;

/* end of original script */



/*	-----------------------	*
 *  Site-specific Functions	*
 *	-----------------------	*/

function init()  {
   var iBase = TextResizeDetector.addEventListener(onFontResize,null);
   adjustNav(iBase);
}

var navContainer;
function onFontResize(e,args) {
	var wrap = $(TextResizeDetector.TARGET_ELEMENT_ID);
	if(wrap){
/*		var msg = "\nThe base font size in pixels: " + args[0].iBase;
		msg +="\nThe current font size in pixels: " + args[0].iSize;
		msg += "\nThe change in pixels from the last size:" + args[0].iDelta;
		alert(msg);		*/
		adjustNav(args[0].iSize);
	}
}
function adjustNav(size) {
	// if the font is larger than maxImgTxtSize in pixels, add a class to the nav container to remove image for text
	var maxImgTxtSize = 15;
	if(!navContainer) {
		navContainer = $("masthead");
	}
	if(navContainer) {
		if(size > maxImgTxtSize) {
			navContainer.addClass("largeFont");
		} else {
			navContainer.removeClass("largeFont");
		}		
	}
}
// id of element to check for and insert control
TextResizeDetector.TARGET_ELEMENT_ID = "wrapper";
// function to call once TextResizeDetector has init'd
TextResizeDetector.USER_INIT_FUNC = init;


/*
	DOMAssistant is developed by Robert Nyman, http://www.robertnyman.com, and it is released according to the
	Creative Commons Attribution-ShareAlike 2.5 license (http://creativecommons.org/licenses/by-sa/2.5/deed.en)
	For more information, please see http://www.robertnyman.com/domassistant
*/
var DOMAssistant = {
	
	methodsToAdd : [],
	
	init : function (){
		this.applyMethod.call(window, "$", this.$);
		window.DOMAssistant = this;
	},
	
	applyMethod : function (method, func){
		if(typeof this[method] != "function"){
			this[method] = func;
		}
	},
	
	addMethods : function (elm){
		if(elm){
			var elms = (elm.constructor == Array)? elm : [elm];
			for(var i=0; i<elms.length; i++){	
				for(var j=0; j<this.methodsToAdd.length; j++){
	            	this.applyMethod.call(elms[i], this.methodsToAdd[j][0], this.methodsToAdd[j][1]);
	            }
			}
		}
	},
	
	$ : function (){
		var elm = null;
		if(document.getElementById){
			elm = (arguments.length > 1)? [] : null;
			var current;
			for(var i=0; i<arguments.length; i++){
				current = arguments[i];
				if(typeof current != "object"){
					current = document.getElementById(current);
				}
				if(arguments.length > 1){
					elm.push(current);
				}
				else{
					elm = current;
				}
			}
			DOMAssistant.addMethods(elm);
		}
		return elm;
    }
}
DOMAssistant.init();

DOMAssistant.initCSS = function (){
	this.addCSSMethods();
};

DOMAssistant.addCSSMethods = function (){
	if(typeof HTMLElement == "function"){		
		HTMLElement.prototype.addClass = this.addClass;
		HTMLElement.prototype.removeClass = this.removeClass;
		HTMLElement.prototype.hasClass = this.hasClass;
		HTMLElement.prototype.getStyle = this.getStyle;
	}
	this.methodsToAdd.push(["addClass", this.addClass]);
	this.methodsToAdd.push(["removeClass", this.removeClass]);
	this.methodsToAdd.push(["hasClass", this.hasClass]);
	this.methodsToAdd.push(["getStyle", this.getStyle]);
};

DOMAssistant.addClass = function (className){
	var currentClass = this.className;
	if(!new RegExp(("(^|\\s)" + className + "(\\s|$)"), "i").test(currentClass)){
		this.className = currentClass + ((currentClass.length > 0)? " " : "") + className;
	}
	return this.className;
};

DOMAssistant.removeClass = function (className){
	var classToRemove = new RegExp(("(^|\\s)" + className + "(\\s|$)"), "i");
	this.className = this.className.replace(classToRemove, "").replace(/^\s+|\s+$/g, "");
	return this.className;
},

DOMAssistant.hasClass = function (className){
	return new RegExp(("(^|\\s)" + className + "(\\s|$)"), "i").test(this.className);
};

DOMAssistant.getStyle = function (cssRule){
	var cssVal = "";
	if(document.defaultView && document.defaultView.getComputedStyle){
		cssVal = document.defaultView.getComputedStyle(this, "").getPropertyValue(cssRule);
	}
	else if(this.currentStyle){
		cssVal = cssRule.replace(/\-(\w)/g, function (match, p1){
			return p1.toUpperCase();
		});
		cssVal = this.currentStyle[cssVal];
	}
	return cssVal;
};

DOMAssistant.initCSS();