presentations

Presentations
Log | Files | Refs

slides.js (15703B)

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