//This function runs on page load
function start() {
	//if we are on the home page, move focus to the text box:
	if(location.pathname.toLowerCase().indexOf("home.")>-1) {
		var el=document.getElementById("txtTerm");
		if(el && el.focus) el.focus();
	}
	
	//set detail view:
	if(document.getElementById("results")) {
		detailSwitcher.start();
	}

	//do this to correct IE6's weird rendering problem (text box misaligned until history arrow is touched):
	historyman.hideList();

	//attach keyboard event handler:
	document.documentElement.onkeyup=keyboarder.action;
}

function corpuslink_on(obj) {obj.src="corpuslink-on.gif";}
function corpuslink_off(obj) {obj.src="corpuslink-off.gif";}

//-------------------------------------------
//-------------------------------------------

//detail switcher object: takes care of switching between less detail and more detail:
var detailSwitcher=new Object();

//the currently selected view; "less" or "more":
detailSwitcher.currentView='less';

//this function runs when the page has loaded.
detailSwitcher.start=function() {
	var view=cookieMaker.readCookie('view');
	if(view) this.set(view);
	
	//if there is no difference between less detail and more detail, hide the buttons:
	var elBlocks=MbmUtils.getElementsByClassName("dDetailBlock");
	var elInlines=MbmUtils.getElementsByClassName("dDetailInline");
	if((elBlocks.length+elInlines.length)==0) {
	document.getElementById("lessdetail").style.display="none";
	document.getElementById("moredetail").style.display="none";
	}
};

//function to swap detail view
detailSwitcher.set=function(view) {
	
	//currentify buttons:
	elLess=document.getElementById("lessdetail");
	elMore=document.getElementById("moredetail");
	if(view=="less") {
		MbmUtils.addClassName(elLess, "current");
		MbmUtils.removeClassName(elMore, "current");
	} else {
		MbmUtils.removeClassName(elLess, "current");
		MbmUtils.addClassName(elMore, "current");
	}
	
	//crawl document:
	var elBlocks=MbmUtils.getElementsByClassName("dDetailBlock");
	var elInlines=MbmUtils.getElementsByClassName("dDetailInline");
	for(var i=0; i<elBlocks.length; i++) {
		if(view=="less") elBlocks[i].style.display="none";
		else elBlocks[i].style.display="block";
	}
	for(var i=0; i<elInlines.length; i++) {
		if(view=="less") elInlines[i].style.display="none";
		else elInlines[i].style.display="inline";
	}
	
	//set the current view:
	this.currentView=view;

	//set a cookie called "view":
	cookieMaker.createCookie("view", this.currentView, 2);
};

//-------------------------------------------
//-------------------------------------------

//style switcher object: takes care of switching colour schemes, remembers the currently selected colour scheme:
var styleSwitcher=new Object();

//the currently selected colour scheme:
styleSwitcher.currentStyle='Amh/Raw';

//This function runs when the page is loading.
styleSwitcher.start=function() {
	var style=cookieMaker.readCookie('colourscheme');
	if(style) this.set(style);
};

//function to swap stylesheets, based on an article by Paul Sowden at http://www.alistapart.com/articles/alternate/
styleSwitcher.set=function(title) {
	//swap stylesheets:
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
			a.disabled = true;
			if(a.getAttribute("title") == title) {
				a.disabled = false;
				this.currentStyle=title;
			}
		}
	}

	//swap logo:
	var logo=document.getElementById("imgLogo");
	if(logo) {
		switch(this.currentStyle) {
			case "Amh/Raw": logo.src="logo-focal-raw.gif"; break;
			case "Múscán/Mouldy": logo.src="logo-focal-mouldy.gif"; break;
			case "Gaineamh/Sandy": logo.src="logo-focal-sandy.gif"; break;
		}

		//set current colour chip:
		var chip;
		chip=document.getElementById("colourchip-raw");    if(this.currentStyle=="Amh/Raw")        chip.className="current"; else chip.className="";
		chip=document.getElementById("colourchip-mouldy"); if(this.currentStyle=="Múscán/Mouldy")  chip.className="current"; else chip.className="";
		chip=document.getElementById("colourchip-sandy");  if(this.currentStyle=="Gaineamh/Sandy") chip.className="current"; else chip.className="";
	}

	//set a cookie called "colourscheme":
	cookieMaker.createCookie("colourscheme", this.currentStyle, 2);

	//make the same change in iframes:
	var frm=frames["frmNews"]; if(frm) frm.styleSwitcher.set(title);
	var frm=frames["frmTOD"];  if(frm) frm.styleSwitcher.set(title);
};

//a function to turn print layout on and off
styleSwitcher.print=function(printOn) {
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1) {
			if(printOn) {
				if(a.getAttribute("href").indexOf("template-screen.css")==0) a.disabled=true;
				if(a.getAttribute("href").indexOf("template-print.css")==0)  a.setAttribute("media", "all");
			} else {
				if(a.getAttribute("href").indexOf("template-screen.css")==0) a.disabled=false;
				if(a.getAttribute("href").indexOf("template-print.css")==0)  a.setAttribute("media", "print");
			}
			
		}
	}
};

//-------------------------------------------
//-------------------------------------------

//Object for working with cookies, by Peter-Paul Koch,
//stolen from the article on style switching at http://www.alistapart.com/articles/alternate/
var cookieMaker=new Object();

cookieMaker.createCookie=function(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
};

cookieMaker.readCookie=function(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
};

//-------------------------------------------
//-------------------------------------------

//Object for working with the keyboard
var keyboarder=new Object();

//this function fires on keyup (handler attached in the function "start()")
keyboarder.action=function(e) {
	var e=window.event || e;
	//alert(e.keyCode+", Ctrl: "+e.ctrlKey+", Alt: "+e.altKey +", Shift: "+e.shiftKey);

	//if Ctrl+Alt+T is pressed, move focus to the textbox
	if(e.keyCode==84 && e.altKey && e.ctrlKey) {
		var el=document.getElementById("txtTerm");
		if(el && el.focus) el.focus();
	}
}

//-------------------------------------------
//-------------------------------------------

//Wrapper object for my utilities:
var MbmUtils=new Object();

//Adds a classname to the element, NOT overwriting any other classnames already in there:
MbmUtils.addClassName=function(element, className) {
	if(element) {
		if(element.className=='')  element.className=className;
		else  element.className+=' '+className;
	}
};

//Removes a classname from an element, keeping any other classnames untouched:
MbmUtils.removeClassName=function(element, className) {
	if(element && element.className) {
		var newClassNames='';
		var classNames=element.className.split(' ');
		for(var i=0; i<classNames.length; i++) {
			if(classNames[i]!=className) {
				if(newClassNames!='') newClassNames+=' ';
				newClassNames+=classNames[i];
			}
		}
		element.className=newClassNames;
	}
};

//getElementsByClassName
/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
MbmUtils.getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};

//-------------------------------------------
//-------------------------------------------

//Object for working with result listings
var dataman=new Object();

//This function fires when an annotation has been mouseovered.
//The "ann" argument refers to the <span class="dAnn..."> element that has been mouseovered.
dataman.annOn=function(ann) {
	if(ann.parentNode) {
		var obj=ann.parentNode;
		MbmUtils.addClassName(obj, "dHighlighted");
	}
};

//This function fires when an annotation has been moused out.
//The "ann" argument refers to the <span class="dAnn..."> element that has been moused out.
dataman.annOff=function(ann) {
	if(ann.parentNode) {
		var obj=ann.parentNode;
		MbmUtils.removeClassName(obj, "dHighlighted");
	}
};

//-------------------------------------------
//-------------------------------------------

//Object for working with search history
var historyman=new Object();

historyman.restore=function(txt) {
	var el=document.getElementById("txtTerm");
	if(el){
		el.value=txt;
		if(el.focus) el.focus();
	}
};

historyman.arrowClick=function() {
	var list=document.getElementById("historyList");
	if(list.style.display!="block") historyman.showList();
	else historyman.hideList();
};

historyman.clickOff=function(e) {
	var event=window.event||e; if(!event.target) event.target=event.srcElement
	if(event.target.id!="historyArrow") historyman.hideList();
};

historyman.showList=function() {
	var list=document.getElementById("historyList");
	if(list) list.style.display="block";
	var arrow=document.getElementById("historyArrow");
	if(arrow) arrow.innerHTML="&#9650;";
	document.onclick=historyman.clickOff;
};

historyman.hideList=function() {
	var list=document.getElementById("historyList");
	if(list) list.style.display="none";
	var arrow=document.getElementById("historyArrow");
	if(arrow) arrow.innerHTML="&#9660;";
	document.onclick=null;
};

//-------------------------------------------
//-------------------------------------------

//Object for working with the copybox (a box from which plain text can be copied)
var copybox=new Object();

copybox.toggle=function(objSrc) {
	var extent=objSrc.parentNode;
	var obj=objSrc.parentNode.parentNode.getElementsByTagName("textarea")[0];
	if(extent && obj) {
		if(obj.style.display=="none") {
			if(copybox.current) copybox.current.style.display="none";
			obj.style.width=extent.offsetWidth+"px";
			obj.style.height=(extent.offsetHeight+4)+"px";
			obj.style.display="block";
			obj.focus();
			copybox.current=obj;
			document.onclick=copybox.clickOff;
		} else {
			obj.style.display="none";
		}
	}
};

copybox.clickOff=function(e) {
	var event=window.event||e; if(!event.target) event.target=event.srcElement
	if(event.target.className!="clipboard-icon" && event.target.className!="clipboard-textbox") {
		copybox.current.style.display="none";
		copybox.current=null;
		document.onclick=null;
	}
};

copybox.showIcon=function(objSrc) {
	var objs=objSrc.getElementsByTagName("span");
	var icon=null;
	for(var i=0; i<objs.length; i++) {
		if(objs[i].className=="clipboard-icon") icon=objs[i];
	}
	if(icon) icon.style.display="inline";
};

copybox.hideIcon=function(objSrc) {
	var objs=objSrc.getElementsByTagName("span");
	var icon=null;
	for(var i=0; i<objs.length; i++) {
		if(objs[i].className=="clipboard-icon") icon=objs[i];
	}
	if(icon) icon.style.display="none";
};