/*

ameaFontResizer.js
cookiesFuncs.js

*/

var dw_fontSizerDX = {
    sizeUnit:       "px",
    defaultSize:    12,
    maxSize:        24,
    minSize:        10,
    queryName:      "dw_fsz",   // name to check query string for when passing size in URL
    queryNum:       true,       // check query string for number only (eg. index.html?18 )
	adjustList:[],
	setDefaults:function(unit,dflt,mn,mx,sels)
	{
		this.sizeUnit=unit;
		this.defaultSize=dflt;
		this.maxSize=mx;
		this.minSize=mn;
		if(sels)this.set(dflt,mn,mx,sels);
	},
	set:function(dflt,mn,mx,sels)
	{
		var ln=this.adjustList.length;
		
		for(var i=0 ; sels[i] ; i++)
		{
			this.adjustList[ln+i]=[];
			this.adjustList[ln+i]["sel"]=sels[i];
			this.adjustList[ln+i]["dflt"]=dflt;
			this.adjustList[ln+i]["min"]=mn||this.minSize;
			this.adjustList[ln+i]["max"]=mx||this.maxSize;
			this.adjustList[ln+i]["ratio"]=this.adjustList[ln+i]["dflt"]/this.defaultSize;
		}
	},
	init:function()
	{
		if(!document.getElementById||!document.getElementsByTagName||!dw_fontSizerDX.ready) return;
		
		var size,sizerEl,i;
		
		size=getValueFromQueryString(this.queryName,this.queryNum);
		
		if (isNaN(parseFloat(size))||size>this.maxSize||size<this.minSize)
		{
			size=getCookie("fontSize");
			
			if(isNaN(parseFloat(size))||size>this.maxSize||size<this.minSize)
			{
				size=this.defaultSize;
			}	
		}
		
		this.curSize=this.defaultSize;
		sizerEl=document.getElementById('sizer');
		
		if (sizerEl) sizerEl.style.display="block";
		
		if (this.adjustList.length==0)
		{
			this.setDefaults(this.sizeUnit,this.defaultSize,this.minSize,this.maxSize,['body','td']);
		}
		
		if (size!=this.defaultSize)
		{
			this.adjust(size-this.defaultSize);
		}
	},
	adjust:function(n)
	{
		if (!this.curSize||!dw_fontSizerDX.ready) return;
		
		var alist,size,list,i,j;
		
		if (n > 0)
		{
			if (this.curSize+n>this.maxSize) n=this.maxSize-this.curSize;
		}
		else if (n<0)
		{
			if(this.curSize+n<this.minSize) n=this.minSize-this.curSize;
		}
		
		if(n==0)return;
		
		this.curSize+=n;
		alist=this.adjustList;
		
		for(i=0;alist[i];i++)
		{
			size=this.curSize*alist[i]['ratio'];
			size=Math.max(alist[i]['min'],size);
			size=Math.min(alist[i]['max'],size);
			list=dw_getElementsBySelector(alist[i]['sel']);
			
			for(j=0;list[j];j++)
			{
				list[j].style.fontSize=size+this.sizeUnit;
			}
		}
		
		setCookie("fontSize",this.curSize,180,"/");
	},
	reset:function()
	{
		if(!this.curSize||!dw_fontSizerDX.ready)return;
		
		var alist=this.adjustList,list,i,j;
		
		for(i=0;alist[i];i++)
		{
			list=dw_getElementsBySelector(alist[i]['sel']);
			
			for(j=0;list[j];j++)
			{
				list[j].style.fontSize='';
			}
		}
		
		this.curSize=this.defaultSize;deleteCookie("fontSize","/");}
};

function dw_getElementsBySelector(selector)
{
	if(!document.getElementsByTagName)return[];
	
	var nodeList=[document],tokens,bits,list,col,els,i,j,k;
	selector=selector.normalize();
	tokens=selector.split(' ');
	
	for(i=0;tokens[i];i++)
	{
		if(tokens[i].indexOf('#')!=-1)
		{
			bits=tokens[i].split('#');
			
			var el=document.getElementById(bits[1]);
			
			if(!el)return[];
			
			if(bits[0])
			{
				if(el.tagName.toLowerCase()!=bits[0].toLowerCase())return[];
			}
			
			for(j=0;nodeList[j];j++)
			{
				if(nodeList[j]==document||dw_contained(el,nodeList[j]))
				{
					nodeList=[el];
				}
				else 
				{
					return[];
				}
			}
		}
		else if(tokens[i].indexOf('.')!=-1)
		{
			bits=tokens[i].split('.');col=[];
			
			for(j=0;nodeList[j];j++)
			{
				els=dw_getElementsByClassName(bits[1],bits[0],nodeList[j]);
				
				for(k=0;els[k];k++)
				{
					col[col.length]=els[k];
				}
			}
			
			nodeList=[];
			
			for(j=0;col[j];j++)
			{
				nodeList.push(col[j]);
			}
		}
		else
		{
			els=[];for(j=0;nodeList[j];j++){list=nodeList[j].getElementsByTagName(tokens[i]);for(k=0;list[k];k++){els.push(list[k]);}}nodeList=els;
		}
	}
	return nodeList;
};

function dw_getElementsByClassName(sClass,sTag,oCont)
{
	var result=[],list,i;
	
	var re=new RegExp("\\b"+sClass+"\\b","i");
	
	oCont=oCont?oCont:document;
	
	if(document.getElementsByTagName)
	{
		if(!sTag||sTag=="*")
		{
			list=oCont.all?oCont.all:oCont.getElementsByTagName("*");
		}
		else
		{
			list=oCont.getElementsByTagName(sTag);
		}
		
		for(i=0;list[i];i++) if(re.test(list[i].className))result.push(list[i]);
	}
	
	return result;
};

function getValueFromQueryString(varName,bReturn)
{
	var val="";
	
	if(window.location.search)
	{
		var qStr=window.location.search.slice(1);
		var ar=qStr.split("&");
		var get=[],ar2;
		
		for(var i=0;ar[i];i++)
		{
			if(ar[i].indexOf("=")!=-1)
			{
				ar2=ar[i].split("=");get[ar2[0]]=ar2[1];
			}
		}
		
		val=get[varName];
		
		if(!val&&bReturn){val=qStr;}
	}
	
	return val;
};

function dw_contained(oNode,oCont)
{
	if(!oNode)return;
	
	while(oNode=oNode.parentNode)if(oNode==oCont)return true;
	
	return false;
};

if (!Array.prototype.push)
{
	Array.prototype.push=function()
	{
		for(var i=0;arguments[i];i++)this[this.length]=arguments[i];return this[this.length-1];
	}
};

String.prototype.normalize=function()
{
	var re=/\s\s+/g;return this.trim().replace(re," ");
};

String.prototype.trim=function()
{
	var re=/^\s+|\s+$/g;return this.replace(re,"");
};

dw_fontSizerDX.ready=true;