slides.js

Requirement =====================================================================================

				goTo(0);
				break;
			case 35: // end
				goTo(smax-1);
				break;
			case 67: // c
				showHide('k');
				break;
		}
		if (key.which < 48 || key.which > 57) {
			number = undef;
		} else {
			if (window.event && isParentOrSelf(window.event.srcElement, 'controls')) return;
			if (key.target && isParentOrSelf(key.target, 'controls')) return;
			number = (((number != undef) ? number : 0) * 10) + (key.which - 48);
		}
	}
	return false;
}

function clicker(e) {
	number = undef;
	var target;
	if (window.event) {
		target = window.event.srcElement;
		e = window.event;
	} else target = e.target;
    if (target.href != null || hasValue(target.rel, 'external') || isParentOrSelf(target, 'controls') || isParentOrSelf(target,'embed') || isParentOrSelf(target, 'object')) return true; 
	if (!e.which || e.which == 1) {
		if (!incrementals[snum] || incpos >= incrementals[snum].length) {
			go(1);
		} else {
			subgo(1);
		}
	}
}

function findSlide(hash) {
	var target = document.getElementById(hash);
	if (target) {
		for (var i = 0; i < slideIDs.length; i++) {
			if (target.id == slideIDs[i]) return i;
		}
	}
	return null;
}

function slideJump() {
	if (window.location.hash == null || window.location.hash == '') {
		currentSlide();
		return;
	}
	if (window.location.hash == null) return;
	var dest = null;
	dest = findSlide(window.location.hash.slice(1));
	if (dest == null) {
		dest = 0;
	}
	go(dest - snum);
}

function fixLinks() {
	var thisUri = window.location.href;
	thisUri = thisUri.slice(0, thisUri.length - window.location.hash.length);
	var aelements = document.getElementsByTagName('A');
	for (var i = 0; i < aelements.length; i++) {
		var a = aelements[i].href;
		var slideID = a.match('\#.+');
		if ((slideID) && (slideID[0].slice(0,1) == '#')) {
			var dest = findSlide(slideID[0].slice(1));
			if (dest != null) {
				if (aelements[i].addEventListener) {
					aelements[i].addEventListener("click", new Function("e",
						"if (document.getElementById('slideProj').disabled) return;" +
						"go("+dest+" - snum); " +
						"if (e.preventDefault) e.preventDefault();"), true);
				} else if (aelements[i].attachEvent) {
					aelements[i].attachEvent("onclick", new Function("",
						"if (document.getElementById('slideProj').disabled) return;" +
						"go("+dest+" - snum); " +
						"event.returnValue = false;"));
				}
			}
		}
	}
}

function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName('a');
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute('href') && hasValue(anchor.rel, 'external')) {
			anchor.target = '_blank';
			addClass(anchor,'external');
		}
	}
}

function createControls() {
	var controlsDiv = document.getElementById("controls");
	if (!controlsDiv) return;
	var hider = ' onmouseover="showHide(\'s\');" onmouseout="showHide(\'h\');"';
	var hideDiv, hideList = '';
	if (controlVis == 'hidden') {
		hideDiv = hider;
	} else {
		hideList = hider;
	}
	controlsDiv.innerHTML = '<form action="#" id="controlForm"' + hideDiv + '>' +
	'<div id="navLinks">' +
	'<a accesskey="t" id="toggle" href="javascript:toggle();">&#216;<\/a>' +
	'<a accesskey="z" id="prev" href="javascript:go(-1);">&laquo;<\/a>' +
	'<a accesskey="x" id="next" href="javascript:go(1);">&raquo;<\/a>' +
	'<div id="navList"' + hideList + '><select id="jumplist" onchange="go(\'j\');"><\/select><\/div>' +
	'<\/div><\/form>';
	if (controlVis == 'hidden') {
		var hidden = document.getElementById('navLinks');
	} else {
		var hidden = document.getElementById('jumplist');
	}
	addClass(hidden,'hideme');
}

function fontScale() {  // causes layout problems in FireFox that get fixed if browser's Reload is used; same may be true of other Gecko-based browsers
	if (!s5mode) return false;
	var vScale = 22;  // both yield 32 (after rounding) at 1024x768
	var hScale = 32;  // perhaps should auto-calculate based on theme's declared value?
	if (window.innerHeight) {
		var vSize = window.innerHeight;
		var hSize = window.innerWidth;
	} else if (document.documentElement.clientHeight) {
		var vSize = document.documentElement.clientHeight;
		var hSize = document.documentElement.clientWidth;
	} else if (document.body.clientHeight) {
		var vSize = document.body.clientHeight;
		var hSize = document.body.clientWidth;
	} else {
		var vSize = 700;  // assuming 1024x768, minus chrome and such
		var hSize = 1024; // these do not account for kiosk mode or Opera Show
	}
	var newSize = Math.min(Math.round(vSize/vScale),Math.round(hSize/hScale));
	fontSize(newSize + 'px');
	if (isGe) {  // hack to counter incremental reflow bugs
		var obj = document.getElementsByTagName('body')[0];
		obj.style.display = 'none';
		obj.style.display = 'block';
	}
}

function fontSize(value) {
	if (!(s5ss = document.getElementById('s5ss'))) {
		if (!isIE) {
			document.getElementsByTagName('head')[0].appendChild(s5ss = document.createElement('style'));
			s5ss.setAttribute('media','screen, projection');
			s5ss.setAttribute('id','s5ss');
		} else {
			document.createStyleSheet();
			document.s5ss = document.styleSheets[document.styleSheets.length - 1];
		}
	}
	if (!isIE) {
		while (s5ss.lastChild) s5ss.removeChild(s5ss.lastChild);
		s5ss.appendChild(document.createTextNode('body {font-size: ' + value + ' !important;}'));
	} else {
		document.s5ss.addRule('body','font-size: ' + value + ' !important;');
	}
}

function notOperaFix() {
	slideCSS = document.getElementById('slideProj').href;
	var slides = document.getElementById('slideProj');
	var outline = document.getElementById('outlineStyle');
	slides.setAttribute('media','screen');
	outline.disabled = true;
	if (isGe) {
		slides.setAttribute('href','null');   // Gecko fix
		slides.setAttribute('href',slideCSS); // Gecko fix
	}
	if (isIE && document.styleSheets && document.styleSheets[0]) {
		document.styleSheets[0].addRule('img', 'behavior: url(ui/default/iepngfix.htc)');
		document.styleSheets[0].addRule('div', 'behavior: url(ui/default/iepngfix.htc)');
		document.styleSheets[0].addRule('.slide', 'behavior: url(ui/default/iepngfix.htc)');
	}
}

function getIncrementals(obj) {
	var incrementals = new Array();
	if (!obj) 
		return incrementals;
	var children = obj.childNodes;
	for (var i = 0; i < children.length; i++) {
		var child = children[i];
		if (hasClass(child, 'incremental')) {
			if (child.nodeName == 'OL' || child.nodeName == 'UL') {
				removeClass(child, 'incremental');
				for (var j = 0; j < child.childNodes.length; j++) {
					if (child.childNodes[j].nodeType == 1) {
						addClass(child.childNodes[j], 'incremental');
					}
				}
			} else {
				incrementals[incrementals.length] = child;
				removeClass(child,'incremental');
			}
		}
		if (hasClass(child, 'show-first')) {
			if (child.nodeName == 'OL' || child.nodeName == 'UL') {
				removeClass(child, 'show-first');
				if (child.childNodes[isGe].nodeType == 1) {
					removeClass(child.childNodes[isGe], 'incremental');
				}
			} else {
				incrementals[incrementals.length] = child;
			}
		}
		incrementals = incrementals.concat(getIncrementals(child));
	}
	return incrementals;
}

function createIncrementals() {
	var incrementals = new Array();
	for (var i = 0; i < smax; i++) {
		incrementals[i] = getIncrementals(document.getElementById(slideIDs[i]));
	}
	return incrementals;
}

function defaultCheck() {
	var allMetas = document.getElementsByTagName('meta');
	for (var i = 0; i< allMetas.length; i++) {
		if (allMetas[i].name == 'defaultView') {
			defaultView = allMetas[i].content;
		}
		if (allMetas[i].name == 'controlVis') {
			controlVis = allMetas[i].content;
		}
	}
}

// Key trap fix, new function body for trap()
function trap(e) {
	if (!e) {
		e = event;
		e.which = e.keyCode;
	}
	try {
		modifierKey = e.ctrlKey || e.altKey || e.metaKey;
	}
	catch(e) {
		modifierKey = false;
	}
	return modifierKey || e.which == 0;
}

function startup() {
	defaultCheck();
	if (!isOp) createControls();
	slideLabel();
	fixLinks();
	externalLinks();
	fontScale();
	if (!isOp) {
		notOperaFix();
		incrementals = createIncrementals();
		slideJump();
		if (defaultView == 'outline') {
			toggle();
		}
		document.onkeyup = keys;
		document.onkeypress = trap;
		document.onclick = clicker;
	}
}

window.onload = startup;
window.onresize = function(){setTimeout('fontScale()', 50);}