public/javascripts/slides.js

   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);}