1// S5 v1.1 slides.js -- released into the Public Domain
2//
3// Please see http://www.meyerweb.com/eric/tools/s5/credits.html for information
4// about all the wonderful and talented contributors to this code!
5
6var undef;
7var slideCSS = '';
8var snum = 0;
9var smax = 1;
10var incpos = 0;
11var number = undef;
12var s5mode = true;
13var defaultView = 'slideshow';
14var controlVis = 'visible';
15
16var isIE = navigator.appName == 'Microsoft Internet Explorer' ? 1 : 0;
17var isOp = navigator.userAgent.indexOf('Opera') > -1 ? 1 : 0;
18var isGe = navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('Safari') < 1 ? 1 : 0;
19
20function hasClass(object, className) {
21	if (!object.className) return false;
22	return (object.className.search('(^|\\s)' + className + '(\\s|$)') != -1);
23}
24
25function hasValue(object, value) {
26	if (!object) return false;
27	return (object.search('(^|\\s)' + value + '(\\s|$)') != -1);
28}
29
30function removeClass(object,className) {
31	if (!object) return;
32	object.className = object.className.replace(new RegExp('(^|\\s)'+className+'(\\s|$)'), RegExp.$1+RegExp.$2);
33}
34
35function addClass(object,className) {
36	if (!object || hasClass(object, className)) return;
37	if (object.className) {
38		object.className += ' '+className;
39	} else {
40		object.className = className;
41	}
42}
43
44function GetElementsWithClassName(elementName,className) {
45	var allElements = document.getElementsByTagName(elementName);
46	var elemColl = new Array();
47	for (var i = 0; i< allElements.length; i++) {
48		if (hasClass(allElements[i], className)) {
49			elemColl[elemColl.length] = allElements[i];
50		}
51	}
52	return elemColl;
53}
54
55function isParentOrSelf(element, id) {
56	if (element == null || element.nodeName=='BODY') return false;
57	else if (element.id == id) return true;
58	else return isParentOrSelf(element.parentNode, id);
59}
60
61function nodeValue(node) {
62	var result = "";
63	if (node.nodeType == 1) {
64		var children = node.childNodes;
65		for (var i = 0; i < children.length; ++i) {
66			result += nodeValue(children[i]);
67		}
68	}
69	else if (node.nodeType == 3) {
70		result = node.nodeValue;
71	}
72	return(result);
73}
74
75function slideLabel() {
76	var slideColl = GetElementsWithClassName('*','slide');
77	var list = document.getElementById('jumplist');
78	smax = slideColl.length;
79	for (var n = 0; n < smax; n++) {
80		var obj = slideColl[n];
81
82		var did = 'slide' + n.toString();
83		obj.setAttribute('id',did);
84		if (isOp) continue;
85
86		var otext = '';
87		var menu = obj.firstChild;
88		if (!menu) continue; // to cope with empty slides
89		while (menu && menu.nodeType == 3) {
90			menu = menu.nextSibling;
91		}
92	 	if (!menu) continue; // to cope with slides with only text nodes
93
94		var menunodes = menu.childNodes;
95		for (var o = 0; o < menunodes.length; o++) {
96			otext += nodeValue(menunodes[o]);
97		}
98		list.options[list.length] = new Option(n + ' : '  + otext, n);
99	}
100}
101
102function currentSlide() {
103	var cs;
104	if (document.getElementById) {
105		cs = document.getElementById('currentSlide');
106	} else {
107		cs = document.currentSlide;
108	}
109	cs.innerHTML = '<span id="csHere">' + snum + '<\/span> ' +
110		'<span id="csSep">\/<\/span> ' +
111		'<span id="csTotal">' + (smax-1) + '<\/span>';
112	if (snum == 0) {
113		cs.style.visibility = 'hidden';
114	} else {
115		cs.style.visibility = 'visible';
116	}
117    window.location.replace( window.location.search + '#slide' + snum);
118}
119
120function go(step) {
121	if (document.getElementById('slideProj').disabled || step == 0) return;
122	var jl = document.getElementById('jumplist');
123	var cid = 'slide' + snum;
124	var ce = document.getElementById(cid);
125	if (incrementals[snum].length > 0) {
126		for (var i = 0; i < incrementals[snum].length; i++) {
127			removeClass(incrementals[snum][i], 'current');
128			removeClass(incrementals[snum][i], 'incremental');
129		}
130	}
131	if (step != 'j') {
132		snum += step;
133		lmax = smax - 1;
134		if (snum > lmax) snum = lmax;
135		if (snum < 0) snum = 0;
136	} else
137		snum = parseInt(jl.value);
138	var nid = 'slide' + snum;
139	var ne = document.getElementById(nid);
140	if (!ne) {
141		ne = document.getElementById('slide0');
142		snum = 0;
143	}
144	if (step < 0) {incpos = incrementals[snum].length} else {incpos = 0;}
145	if (incrementals[snum].length > 0 && incpos == 0) {
146		for (var i = 0; i < incrementals[snum].length; i++) {
147			if (hasClass(incrementals[snum][i], 'current'))
148				incpos = i + 1;
149			else
150				addClass(incrementals[snum][i], 'incremental');
151		}
152	}
153	if (incrementals[snum].length > 0 && incpos > 0)
154		addClass(incrementals[snum][incpos - 1], 'current');
155	ce.style.visibility = 'hidden';
156	ne.style.visibility = 'visible';
157	jl.selectedIndex = snum;
158	currentSlide();
159	number = 0;
160}
161
162function goTo(target) {
163	if (target >= smax || target == snum) return;
164	go(target - snum);
165}
166
167function subgo(step) {
168	if (step > 0) {
169		removeClass(incrementals[snum][incpos - 1],'current');
170		removeClass(incrementals[snum][incpos], 'incremental');
171		addClass(incrementals[snum][incpos],'current');
172		incpos++;
173	} else {
174		incpos--;
175		removeClass(incrementals[snum][incpos],'current');
176		addClass(incrementals[snum][incpos], 'incremental');
177		addClass(incrementals[snum][incpos - 1],'current');
178	}
179}
180
181function toggle() {
182	var slideColl = GetElementsWithClassName('*','slide');
183	var slides = document.getElementById('slideProj');
184	var outline = document.getElementById('outlineStyle');
185	if (!slides.disabled) {
186		slides.disabled = true;
187		outline.disabled = false;
188		s5mode = false;
189		fontSize('1em');
190		for (var n = 0; n < smax; n++) {
191			var slide = slideColl[n];
192			slide.style.visibility = 'visible';
193		}
194	} else {
195		slides.disabled = false;
196		outline.disabled = true;
197		s5mode = true;
198		fontScale();
199		for (var n = 0; n < smax; n++) {
200			var slide = slideColl[n];
201			slide.style.visibility = 'hidden';
202		}
203		slideColl[snum].style.visibility = 'visible';
204	}
205}
206
207function showHide(action) {
208	var obj = GetElementsWithClassName('*','hideme')[0];
209	switch (action) {
210	case 's': obj.style.visibility = 'visible'; break;
211	case 'h': obj.style.visibility = 'hidden'; break;
212	case 'k':
213		if (obj.style.visibility != 'visible') {
214			obj.style.visibility = 'visible';
215		} else {
216			obj.style.visibility = 'hidden';
217		}
218	break;
219	}
220}
221
222// 'keys' code adapted from MozPoint (http://mozpoint.mozdev.org/)
223function keys(key) {
224	if (!key) {
225		key = event;
226		key.which = key.keyCode;
227	}
228	if (key.which == 84) {
229		toggle();
230		return;
231	}
232	if (s5mode) {
233		switch (key.which) {
234			case 10: // return
235			case 13: // enter
236				if (window.event && isParentOrSelf(window.event.srcElement, 'controls')) return;
237				if (key.target && isParentOrSelf(key.target, 'controls')) return;
238				if(number != undef) {
239					goTo(number);
240					break;
241				}
242			case 32: // spacebar
243			case 34: // page down
244			case 39: // rightkey
245			case 40: // downkey
246				if(number != undef) {
247					go(number);
248				} else if (!incrementals[snum] || incpos >= incrementals[snum].length) {
249					go(1);
250				} else {
251					subgo(1);
252				}
253				break;
254			case 33: // page up
255			case 37: // leftkey
256			case 38: // upkey
257				if(number != undef) {
258					go(-1 * number);
259				} else if (!incrementals[snum] || incpos <= 0) {
260					go(-1);
261				} else {
262					subgo(-1);
263				}
264				break;
265			case 36: // home
266				goTo(0);
267				break;
268			case 35: // end
269				goTo(smax-1);
270				break;
271			case 67: // c
272				showHide('k');
273				break;
274		}
275		if (key.which < 48 || key.which > 57) {
276			number = undef;
277		} else {
278			if (window.event && isParentOrSelf(window.event.srcElement, 'controls')) return;
279			if (key.target && isParentOrSelf(key.target, 'controls')) return;
280			number = (((number != undef) ? number : 0) * 10) + (key.which - 48);
281		}
282	}
283	return false;
284}
285
286function clicker(e) {
287	number = undef;
288	var target;
289	if (window.event) {
290		target = window.event.srcElement;
291		e = window.event;
292	} else target = e.target;
293	if (target.getAttribute('href') != null || hasValue(target.rel, 'external') || isParentOrSelf(target, 'controls') || isParentOrSelf(target,'embed') || isParentOrSelf(target,'object')) return true;
294	if (!e.which || e.which == 1) {
295		if (!incrementals[snum] || incpos >= incrementals[snum].length) {
296			go(1);
297		} else {
298			subgo(1);
299		}
300	}
301}
302
303function findSlide(hash) {
304	var target = null;
305	var slides = GetElementsWithClassName('*','slide');
306	for (var i = 0; i < slides.length; i++) {
307		var targetSlide = slides[i];
308		if ( (targetSlide.name && targetSlide.name == hash)
309		 || (targetSlide.id && targetSlide.id == hash) ) {
310			target = targetSlide;
311			break;
312		}
313	}
314	while(target != null && target.nodeName != 'BODY') {
315		if (hasClass(target, 'slide')) {
316			return parseInt(target.id.slice(5));
317		}
318		target = target.parentNode;
319	}
320	return null;
321}
322
323function slideJump() {
324	if (window.location.hash == null) return;
325	var sregex = /^#slide(\d+)$/;
326	var matches = sregex.exec(window.location.hash);
327	var dest = null;
328	if (matches != null) {
329		dest = parseInt(matches[1]);
330	} else {
331		dest = findSlide(window.location.hash.slice(1));
332	}
333	if (dest != null)
334		go(dest - snum);
335}
336
337function fixLinks() {
338	var thisUri = window.location.href;
339	thisUri = thisUri.slice(0, thisUri.length - window.location.hash.length);
340	var aelements = document.getElementsByTagName('A');
341	for (var i = 0; i < aelements.length; i++) {
342		var a = aelements[i].href;
343		var slideID = a.match('\#slide[0-9]{1,2}');
344		if ((slideID) && (slideID[0].slice(0,1) == '#')) {
345			var dest = findSlide(slideID[0].slice(1));
346			if (dest != null) {
347				if (aelements[i].addEventListener) {
348					aelements[i].addEventListener("click", new Function("e",
349						"if (document.getElementById('slideProj').disabled) return;" +
350						"go("+dest+" - snum); " +
351						"if (e.preventDefault) e.preventDefault();"), true);
352				} else if (aelements[i].attachEvent) {
353					aelements[i].attachEvent("onclick", new Function("",
354						"if (document.getElementById('slideProj').disabled) return;" +
355						"go("+dest+" - snum); " +
356						"event.returnValue = false;"));
357				}
358			}
359		}
360	}
361}
362
363function externalLinks() {
364	if (!document.getElementsByTagName) return;
365	var anchors = document.getElementsByTagName('a');
366	for (var i=0; i<anchors.length; i++) {
367		var anchor = anchors[i];
368		if (anchor.getAttribute('href') && hasValue(anchor.rel, 'external')) {
369			anchor.target = '_blank';
370			addClass(anchor,'external');
371		}
372	}
373}
374
375function createControls() {
376	var controlsDiv = document.getElementById("controls");
377	if (!controlsDiv) return;
378	var hider = ' onmouseover="showHide(\'s\');" onmouseout="showHide(\'h\');"';
379	var hideDiv, hideList = '';
380	if (controlVis == 'hidden') {
381		hideDiv = hider;
382	} else {
383		hideList = hider;
384	}
385	controlsDiv.innerHTML = '<form action="#" id="controlForm"' + hideDiv + '>' +
386	'<div id="navLinks">' +
387	'<a accesskey="t" id="toggle" href="javascript:toggle();">&#216;<\/a>' +
388	'<a accesskey="z" id="prev" href="javascript:go(-1);">&laquo;<\/a>' +
389	'<a accesskey="x" id="next" href="javascript:go(1);">&raquo;<\/a>' +
390	'<div id="navList"' + hideList + '><select id="jumplist" onchange="go(\'j\');"><\/select><\/div>' +
391	'<\/div><\/form>';
392	if (controlVis == 'hidden') {
393		var hidden = document.getElementById('navLinks');
394	} else {
395		var hidden = document.getElementById('jumplist');
396	}
397	addClass(hidden,'hideme');
398}
399
400function fontScale() {  // causes layout problems in FireFox that get fixed if browser's Reload is used; same may be true of other Gecko-based browsers
401	if (!s5mode) return false;
402	var vScale = 22;  // both yield 32 (after rounding) at 1024x768
403	var hScale = 32;  // perhaps should auto-calculate based on theme's declared value?
404	if (window.innerHeight) {
405		var vSize = window.innerHeight;
406		var hSize = window.innerWidth;
407	} else if (document.documentElement.clientHeight) {
408		var vSize = document.documentElement.clientHeight;
409		var hSize = document.documentElement.clientWidth;
410	} else if (document.body.clientHeight) {
411		var vSize = document.body.clientHeight;
412		var hSize = document.body.clientWidth;
413	} else {
414		var vSize = 700;  // assuming 1024x768, minus chrome and such
415		var hSize = 1024; // these do not account for kiosk mode or Opera Show
416	}
417	var newSize = Math.min(Math.round(vSize/vScale),Math.round(hSize/hScale));
418	fontSize(newSize + 'px');
419	if (isGe) {  // hack to counter incremental reflow bugs
420		var obj = document.getElementsByTagName('body')[0];
421		obj.style.display = 'none';
422		obj.style.display = 'block';
423	}
424}
425
426function fontSize(value) {
427	if (!(s5ss = document.getElementById('s5ss'))) {
428		if (!isIE) {
429			document.getElementsByTagName('head')[0].appendChild(s5ss = document.createElement('style'));
430			s5ss.setAttribute('media','screen, projection');
431			s5ss.setAttribute('id','s5ss');
432		} else {
433			document.createStyleSheet();
434			document.s5ss = document.styleSheets[document.styleSheets.length - 1];
435		}
436	}
437	if (!isIE) {
438		while (s5ss.lastChild) s5ss.removeChild(s5ss.lastChild);
439		s5ss.appendChild(document.createTextNode('body {font-size: ' + value + ' !important;}'));
440	} else {
441		document.s5ss.addRule('body','font-size: ' + value + ' !important;');
442	}
443}
444
445function notOperaFix() {
446	slideCSS = document.getElementById('slideProj').href;
447	var slides = document.getElementById('slideProj');
448	var outline = document.getElementById('outlineStyle');
449	slides.setAttribute('media','screen');
450	outline.disabled = true;
451	if (isGe) {
452		slides.setAttribute('href','null');   // Gecko fix
453		slides.setAttribute('href',slideCSS); // Gecko fix
454	}
455	if (isIE && document.styleSheets && document.styleSheets[0]) {
456		document.styleSheets[0].addRule('img', 'behavior: url(ui/default/iepngfix.htc)');
457		document.styleSheets[0].addRule('div', 'behavior: url(ui/default/iepngfix.htc)');
458		document.styleSheets[0].addRule('.slide', 'behavior: url(ui/default/iepngfix.htc)');
459	}
460}
461
462function getIncrementals(obj) {
463	var incrementals = new Array();
464	if (!obj)
465		return incrementals;
466	var children = obj.childNodes;
467	for (var i = 0; i < children.length; i++) {
468		var child = children[i];
469		if (hasClass(child, 'incremental')) {
470			if (child.nodeName == 'OL' || child.nodeName == 'UL') {
471				removeClass(child, 'incremental');
472				for (var j = 0; j < child.childNodes.length; j++) {
473					if (child.childNodes[j].nodeType == 1) {
474						addClass(child.childNodes[j], 'incremental');
475					}
476				}
477			} else {
478				incrementals[incrementals.length] = child;
479				removeClass(child,'incremental');
480			}
481		}
482		if (hasClass(child, 'show-first')) {
483			if (child.nodeName == 'OL' || child.nodeName == 'UL') {
484				removeClass(child, 'show-first');
485				if (child.childNodes[isGe].nodeType == 1) {
486					removeClass(child.childNodes[isGe], 'incremental');
487				}
488			} else {
489				incrementals[incrementals.length] = child;
490			}
491		}
492		incrementals = incrementals.concat(getIncrementals(child));
493	}
494	return incrementals;
495}
496
497function createIncrementals() {
498	var incrementals = new Array();
499	for (var i = 0; i < smax; i++) {
500		incrementals[i] = getIncrementals(document.getElementById('slide'+i));
501	}
502	return incrementals;
503}
504
505function defaultCheck() {
506	var allMetas = document.getElementsByTagName('meta');
507	for (var i = 0; i< allMetas.length; i++) {
508		if (allMetas[i].name == 'defaultView') {
509			defaultView = allMetas[i].content;
510		}
511		if (allMetas[i].name == 'controlVis') {
512			controlVis = allMetas[i].content;
513		}
514	}
515}
516
517// Key trap fix, new function body for trap()
518function trap(e) {
519	if (!e) {
520		e = event;
521		e.which = e.keyCode;
522	}
523	try {
524		modifierKey = e.ctrlKey || e.altKey || e.metaKey;
525	}
526	catch(e) {
527		modifierKey = false;
528	}
529	return modifierKey || e.which == 0;
530}
531
532function startup() {
533	defaultCheck();
534	if (!isOp) createControls();
535	slideLabel();
536	fixLinks();
537	externalLinks();
538	fontScale();
539	if (!isOp) {
540		notOperaFix();
541		incrementals = createIncrementals();
542		slideJump();
543		if (defaultView == 'outline') {
544			toggle();
545		}
546		document.onkeyup = keys;
547		document.onkeypress = trap;
548		document.onclick = clicker;
549	}
550}
551
552window.onload = startup;
553window.onresize = function(){setTimeout('fontScale()', 50);}
554