simpleWebSlides.js

   1 /*
   2   Namespace object.
   3 */
   4
   5 var SWS = SWS || {};
   6
   7
   8
   9 SWS.Utils = new function () {
  10     var self = this;
  11
  12     self.isUndefined = function (o) { return typeof o == "undefined"; };
  13     self.push2 = function (t, i, v) {
  14         if ((typeof t[i]) == 'undefined') {
  15             t[i] = new Array();
  16         };
  17         var l = t[i].length;
  18         t[i][l] = v;
  19     };
  20
  21     self.isEmpty = function (o) {
  22         for(var _ in o) return false;
  23         return true;
  24     };
  25
  26     self.parseFrameSpec = function (s) {
  27         var elems = s.split("_");
  28         var result = {};
  29         var min_last = 10000;
  30         var max_value = -1;
  31         for(var i = 0; i < elems.length; i++){
  32             var bounds = elems[i].split("-");
  33             if (bounds.length > 2 || bounds.length == 0) return {};
  34             if (bounds.length == 1) bounds[1] = bounds[0];
  35             var a = parseInt(bounds[0]);
  36             var b = parseInt(bounds[1])
  37             if (!isFinite(a) || !isFinite(b)) return {};
  38             a = Math.min(a, 1000); // don't allow more than 1000 frames/slide
  39             b = Math.min(b, 1000);
  40             if (b > max_value) max_value = b;
  41             for (var j = a; j <= b; j++)
  42                 result[j] = true;
  43         };
  44         return result;
  45     };
  46
  47     self.getParameterByName = function (name) {
  48         name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  49         var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
  50         results = regex.exec(location.search);
  51         return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
  52     }
  53 };
  54
  55
  56
  57
  58 SWS.Templates = new function () {
  59     var self = this;
  60     self.helpPanel = "<div id='sws-help-panel-canvas'>\
  61 <h1>Keyboard shortcuts</h1>\
  62 <table>\
  63 <tr ><td style='color:#f55;'>h</td><td style='color:#f55;'> toggle help</td></tr>\
  64 <tr><td>c</td><td> toggle the control panel</td></tr>\
  65 <tr><td>Left, PgUp,swipe left</td><td> previous step</td></tr>\
  66 <tr><td>Right, PgDown, Space, swipe right</td><td> next step</td></tr>\
  67 <tr><td>p</td><td> previous slide</td></tr>\
  68 <tr><td>n</td><td> next slide</td></tr>\
  69 <tr><td>Home</td><td> first slide</td></tr>\
  70 <tr><td>End</td><td> last slide</td></tr>\
  71 </table>\
  72 </div>";
  73     self.controlPanel = "<div id='sws-control-panel-canvas'><div id='sws-control-panel'>\
  74 <div id='sws-control-panel-title-bar'>\
  75 <a title='Toggle fullscreen' id='sws-control-panel-fullscreen' class='sws-symbol' onclick='SWS.Presentation.toggleFullScreen();'></a>\
  76 <a title='Close panel' id='sws-control-panel-close' onclick='$(\"#sws-control-panel-canvas\").toggle();'>&#x2716;</a>\
  77 </div>\
  78 <div id='sws-control-panel-options'>\
  79 <span title='Change the aspect ratio' class='sws-symbol' >&#x1f4bb;</span><select id='sws-aspect-select' onchange='SWS.Presentation.changeAspect();'>\
  80 <option value='sws-aspect-4-3' selected='selected'>4:3</option>\
  81 <option value='sws-aspect-16-9'>16:9</option>\
  82 <option value='sws-aspect-16-10'>16:10</option>\
  83 </select>\
  84 <span title='Change the theme' class='sws-symbol'>&#x1f3a8;</span><select id='sws-theme-select' onchange='SWS.Presentation.changeTheme();'></select>\
  85 <a onclick='SWS.Presentation.openPrint()' ><span title='Open Print-Out' class='sws-symbol'>&#59158;</span></a>\
  86 </div>\
  87 <div id='sws-control-panel-navigation'>\
  88 <a title='First slide' class='sws-symbol' onclick='SWS.Presentation.goToSlide(SWS.Presentation.firstSlide());' >&#x23ee;</a>\
  89 <a title='Previous slide' class='sws-symbol' onclick='SWS.Presentation.previousSlide();SWS.Presentation.refresh();'>&#x23ea;</a>\
  90 <a title='Previous step' class='sws-symbol' style='-webkit-transform: scaleX(-1);' onclick='SWS.Presentation.previous();SWS.Presentation.refresh();'>&#x25b6;</a>\
  91 <a title='Next step' class='sws-symbol' onclick='SWS.Presentation.next();SWS.Presentation.refresh();'>&#x25b6;</a>\
  92 <a title='Next slide' class='sws-symbol' onclick='SWS.Presentation.nextSlide();SWS.Presentation.refresh();'>&#x23e9;</a>\
  93 <a title='Last slide' class='sws-symbol' onclick='SWS.Presentation.goToSlide(SWS.Presentation.lastSlide());'>&#x23ed;</a>\
  94 <br/>\
  95 <span class='sws-symbol'>&#xe4ae;</span><input type='text' id='sws-control-panel-slide-input' oninput='SWS.Presentation.goToSlide($(\"#sws-control-panel-slide-input\").val()-1);'></input><span id='sws-control-panel-total-slides'></span>\
  96 <input type='range' title='Navigate the presentation' id='sws-control-panel-navigation-bar' onchange='SWS.Presentation.navigate();' step='1'></input>\
  97 </div>\
  98 </div>\
  99 </div>";
 100     self.slideActivate = function (o) {
 101         if (!(o.hasClass("sws-active-slide"))){
 102             o.removeClass("sws-inactive-slide").addClass("sws-active-slide");
 103         };
 104     };
 105
 106     self.slideDeactivate = function (o) {
 107         if (!(o.hasClass("sws-inactive-slide"))){
 108             o.removeClass("sws-active-slide").addClass("sws-inactive-slide");
 109         };
 110     };
 111
 112     self.slideChange = function (from, to) {
 113         var canvas = $(".sws-canvas");
 114         self.slideDeactivate($(canvas[from]));
 115         self.slideActivate($(canvas[to]));
 116     };
 117
 118     self.objectActivate = function (o) {
 119         if (!(o.hasClass("sws-active-object"))){
 120             o.removeClass("sws-inactive-object").addClass("sws-active-object");
 121             return true;
 122         };
 123         return false;
 124     };
 125
 126     self.objectDeactivate = function (o) {
 127         if (!(o.hasClass("sws-inactive-object"))){
 128             o.addClass("sws-inactive-object").removeClass("sws-active-object");
 129             return true;
 130         };
 131         return false;
 132     };
 133
 134     self.updateFooter = function (o) {
 135         var footer = o.find(".sws-footer");
 136         if (footer.length && (footer.children("*").length == 0)) {
 137             var i = SWS.Presentation.getCurrentSlide();
 138             var cur = $( "<span class='sws-current-slide-number'>"
 139                          + (i + 1)
 140                          +"</span>");
 141             var sep = $( "<span class='sws-slide-num-sep' />");
 142             var tot = $( "<span class='sws-last-slide-number'>"
 143                          + (SWS.Presentation.getNumSlides())
 144                          +"</span>");
 145             footer.append(cur).append(sep).append(tot);
 146         };
 147     };
 148     self.updateHeader = function (o) {};
 149 };
 150 SWS.ConfigBuilder = function () {
 151     var self = this;
 152     self['sws-object-activate'] = SWS.Templates.objectActivate;
 153     self['sws-object-deactivate'] = SWS.Templates.objectDeactivate;
 154     self['sws-slide-change'] = SWS.Templates.slideChange;
 155     self['sws-update-footer'] = SWS.Templates.updateFooter;
 156     self['sws-update-header'] = SWS.Templates.updateHeader;
 157 };
 158
 159 SWS.Defaults = new SWS.ConfigBuilder ();
 160
 161 SWS.Config = new SWS.ConfigBuilder ();
 162
 163
 164 SWS.Effects = new function () {
 165     var self = this;
 166
 167     self.objectDeactivateFadeOut = function (o) {
 168         if (o.is("embed")) return;
 169         o.animate({'opacity': '0'}, 200,
 170                   function () {
 171
 172                       SWS.Templates.objectDeactivate(o);
 173                   });
 174     };
 175
 176     self.objectActivateFadeIn = function (o) {
 177
 178         if (SWS.Templates.objectActivate(o)){
 179             o.animate({'opacity': '1' }, 200);
 180         };
 181
 182     };
 183
 184     self.slideChangeHorizontalFlip = function (from, to){
 185         var f = SWS.Presentation.getSlide(from);
 186         var t = SWS.Presentation.getSlide(to);
 187         f.animate({ 'left': '50%', 'width': '0pt', 'opacity':'0' }, 150,
 188                   function  () {
 189                       SWS.Templates.slideDeactivate(f);
 190                       f.css({'left':'0%', 'width': '100%'});
 191                       t.css({ 'left': '50%', 'width': '0pt','opacity':'0' });
 192                       SWS.Templates.slideActivate(t);
 193                       t.animate({'left':'0%', 'width': '100%','opacity':'1'});
 194                   });
 195     };
 196     self.slideChangeFadeOutIn = function (from, to) {
 197         var f = SWS.Presentation.getSlide(from);
 198         var t = SWS.Presentation.getSlide(to);
 199         f.animate({ 'opacity': '0'}, 150,
 200                   function () { SWS.Templates.slideDeactivate(f);
 201                                 SWS.Templates.slideActivate(t);
 202                                 t.css('opacity', '0');
 203                                 t.animate({ 'opacity': '1'}, 150);
 204                               });
 205     };
 206     self.slideChangeHorizontalSlide = function (from, to) {
 207         var f = SWS.Presentation.getSlide(from);
 208         var t = SWS.Presentation.getSlide(to);
 209         if (from < to) {
 210             t.css('left', '100%');
 211             t.css('opacity', '1');
 212             SWS.Templates.slideActivate(t);
 213             f.animate({ 'left': '-100%' }, 250, function () { SWS.Templates.slideDeactivate(f);
 214                                                               f.css('opacity', '0');
 215                                                               t.animate({ 'left': '0%' }, 250);
 216                                                             });
 217         } else {
 218             t.css('left', '-100%');
 219             SWS.Templates.slideActivate(t);
 220             f.animate({ 'left': '100%' }, 250, function () { SWS.Templates.slideDeactivate(f);
 221                                                              f.css('opacity', '0');
 222                                                            });
 223             t.css('opacity', '1');
 224             t.animate({ 'left': '0%' }, 250);
 225         };
 226     };
 227
 228
 229     self.slideChangeVerticalSlide = function (from, to) {
 230         var f = SWS.Presentation.getSlide(from);
 231         var t = SWS.Presentation.getSlide(to);
 232         if (from < to) {
 233             t.css('top', '100%');
 234             SWS.Templates.slideActivate(t);
 235             f.animate({ 'top': '-100%' }, 250, function () { SWS.Templates.slideDeactivate(f); });
 236             t.animate({ 'top': '0%' }, 250);
 237         } else {
 238             t.css('top', '-100%');
 239             SWS.Templates.slideActivate(t);
 240             f.animate({ 'top': '100%' }, 250, function () { SWS.Templates.slideDeactivate(f); });
 241             t.animate({ 'top': '0%' }, 250);
 242         };
 243     };
 244
 245 };
 246
 247 SWS.Fullscreen = new function () {
 248     var self = this;
 249
 250     if (SWS.Utils.isUndefined(document.fullScreen)) {
 251         if (SWS.Utils.isUndefined(document.mozfullScreen)) {
 252             self.status = function () { return document.webkitIsFullScreen; };
 253             self.enter = function(e) {
 254                 e.webkitRequestFullScreen();
 255             };
 256             self.exit = function () {
 257                 document.webkitCancelFullScreen();
 258             };
 259
 260         } else {
 261             self.status = function () { return document.mozfullScreen; };
 262             self.enter = function(e) {
 263                 e.mozRequestFullScreen();
 264             };
 265             self.exit = function () {
 266                 document.mozCancelFullScreen();
 267             };
 268
 269         };
 270     } else {
 271             self.status = function () { return document.fullScreen; };
 272             self.enter = function(e) {
 273                 e.requestFullScreen();
 274             };
 275             self.exit = function () {
 276                 document.cancelFullScreen();
 277             };
 278
 279     };
 280
 281
 282 };
 283
 284 SWS.Presentation = new function () {
 285
 286
 287     var self = this;
 288
 289     //TODO move outside of the Presentation object
 290
 291
 292     var _total_slides;
 293     var _initialized = false;
 294     var _disable_input_events = false;
 295     var _print_mode = false;
 296     var _slide_callbacks = new Array ();
 297     var _total_steps = -1;
 298     var _current_theme = "";
 299
 300     self.getNumSlides = function () { return _total_slides; };
 301
 302     self.getSlide = function(i) {
 303         return $($(".sws-canvas")[i]);
 304     };
 305
 306     self.registerCallback = function (i, f) {
 307         if (_initialized) return;
 308         //jQuery does not seem to work well
 309         //on a partial DOM
 310         var slides = $(".sws-slide");
 311         var h1s = $("body").children("h1");
 312         var slide_num = slides.add(h1s).length - 1;
 313         SWS.Utils.push2(_slide_callbacks, slide_num,{ 'fn': f, 'frame': i });
 314
 315     };
 316
 317     if (typeof(Storage)!=="undefined"){
 318         self.getCurrentSlide = function () {
 319             //unary + casts to integer
 320             var i = +(sessionStorage.getItem("current_slide"));
 321             if (!(i >= 0 && i < self.getNumSlides())){
 322                 return 0;
 323             } else {
 324                 return i;
 325             };
 326         };
 327
 328         self.setCurrentSlide = function (i) {
 329             sessionStorage.setItem("current_slide", i);
 330         };
 331
 332         self.showHelpAtStartup = function () {
 333             var r = sessionStorage.getItem("show_help");
 334             if (r == "hide") return false;
 335             sessionStorage.setItem("show_help", "hide");
 336             return true;
 337         };
 338
 339     } else {
 340         var _current_slide = 0;
 341         self.getCurrentSlide = function () { return _current_slide; };
 342         self.setCurrentSlide = function (i) { _current_slide = i; };
 343         self.showHelpAtStartup = function () { return false; };
 344     };
 345     self.firstSlide = function () { return 0; };
 346     self.lastSlide = function () { return self.getNumSlides() - 1; };
 347     self.refresh = function () {
 348         /* block upcoming input event until all animations are finished */
 349         _disable_input_events = true;
 350
 351         var canvas = $(".sws-canvas");
 352         var from_slide_num = canvas.index($(".sws-active-slide"));
 353         var to_slide_num = self.getCurrentSlide();
 354         var watch_slide_anim = false;
 355         var to_slide = $(canvas[to_slide_num]);
 356         var from_slide = $(canvas[from_slide_num]);
 357         var slide_change = (from_slide_num != to_slide_num);
 358
 359
 360         var info = to_slide.data("sws-frame-info");
 361         SWS.Config['sws-update-header'](to_slide);
 362         SWS.Config['sws-update-footer'](to_slide);
 363
 364         if (slide_change) {
 365             //Launch a slide transition:
 366             SWS.Config['sws-slide-change'](from_slide_num, to_slide_num);
 367             watch_slide_anim = true;
 368             for (var i = 0; i < info.callbacks.at_slide.length;i++){
 369                 info.callbacks.at_slide[i](to_slide);
 370             };
 371         };
 372
 373
 374         var cur = info.current;
 375         var custom = info.custom;
 376         var real_slide = to_slide.find(".sws-slide");
 377         var dont_touch = real_slide.find("sws-protect").find("*").addBack();
 378         real_slide.find("*").addBack().not(dont_touch).each(function (i){
 379             var frameset = $(this).data("sws-frame-set") || {};
 380             if (frameset[cur])
 381                 SWS.Config['sws-object-activate']($(this));
 382             else
 383                 SWS.Config['sws-object-deactivate']($(this));
 384         });
 385
 386
 387         var all = $(from_slide).add(to_slide);
 388         all.find("*").addBack().promise().done(function() {
 389             var callbacks;
 390             //execute callbacks when all elements are finished transitioning
 391             if (callbacks = info.callbacks.at_frame[self.getCurrentFrame()]){
 392                 for (var k = 0; k < callbacks.length; k++)
 393                     callbacks[k]($(to_slide));
 394             };
 395             all.find("*").addBack().promise().done(function() {
 396                 //wait for all elements to finish transitionning, in case a callback animate something
 397                 //and enable _input_events again.
 398                 _disable_input_events = false;
 399             });
 400         });
 401     };
 402
 403     self.nextSlide = function () {
 404         self.setCurrentSlide(Math.min(self.getCurrentSlide()+1,
 405                                       self.lastSlide()));
 406         self.setCurrentFrame(self.firstFrame());
 407     };
 408
 409     self.previousSlide = function () {
 410         self.setCurrentSlide(Math.max(self.getCurrentSlide()-1,
 411                                       self.firstSlide()));
 412         self.setCurrentFrame(self.firstFrame());
 413     };
 414
 415     self.getFrameInfo = function () {
 416
 417         var i = self.getCurrentSlide();
 418         var canvas = $($(".sws-canvas")[i]);
 419         var infos = canvas.data("sws-frame-info");
 420         return infos;
 421     };
 422
 423     self.getTotalSteps = function () {
 424         if (_total_steps >= 0) return _total_steps;
 425         _total_steps = 0;
 426         $(".sws-canvas").each(function(i) {
 427             var canvas = $($(".sws-canvas")[i]);
 428             var infos = canvas.data("sws-frame-info");
 429             _total_steps += infos.last + 1;
 430         });
 431         return _total_steps;
 432     };
 433
 434     self.getCurrentFrame = function () { return self.getFrameInfo().current; };
 435     self.setCurrentFrame = function (i) { self.getFrameInfo().current = i; };
 436     self.firstFrame = function () { return 0; };
 437     self.lastFrame = function () { return self.getFrameInfo().last; };
 438
 439     self.nextFrame = function () {
 440         self.setCurrentFrame(Math.min(self.getCurrentFrame()+1,
 441                                       self.lastFrame()));
 442
 443     };
 444     self.previousFrame = function () {
 445         self.setCurrentFrame(Math.max(self.getCurrentFrame()-1,
 446                                        self.firstFrame()));
 447     };
 448
 449     self.next = function () {
 450         var i = self.getCurrentFrame();
 451         if (i == self.lastFrame()) {
 452             self.nextSlide();
 453             self.setCurrentFrame(self.firstFrame());
 454         } else
 455             self.nextFrame();
 456     };
 457
 458     self.previous = function () {
 459         var i = self.getCurrentFrame();
 460         if (i == self.firstFrame()){
 461             self.previousSlide();
 462             self.setCurrentFrame(self.lastFrame());
 463         }
 464         else
 465             self.previousFrame();
 466     };
 467
 468     self.goToSlide = function (s, f) {
 469         if (SWS.Utils.isUndefined(f))
 470             f = 0;
 471         if (!(s >= self.firstSlide() && s <= self.lastSlide())) return;
 472         self.setCurrentSlide(s);
 473         if (!(f >= self.firstFrame() && f <= self.lastFrame())) f = 0;
 474         self.setCurrentFrame(f);
 475         self.refresh();
 476     };
 477
 478     self.cycleStyle = function() {
 479         var styles = $("head").children('link[rel$="stylesheet"][title]');
 480         var j = styles.index(styles.filter(':not(:disabled)'));
 481         styles[j].disabled = true;
 482         if (++j == styles.length) j = 0;
 483         styles[j].disabled = false;
 484     };
 485
 486
 487     self.printMode = function () {
 488         _print_mode = true;
 489
 490         var old_fx_status = $.fx.off;
 491         //disable animation while printing.
 492
 493         $.fx.off = true;
 494         var progress = $("<div style='position:fixed;top:0pt;left:0pt;background:white;color:black;width:100%;height:100vh;z-index:200;' id='sws-print-progress'>Rendering presentation: <span id='sws-percent-progress'></span>%</div>");
 495         $("body").append(progress);
 496
 497         $("html").removeClass("sws-display").addClass("sws-print");
 498         self.goToSlide(0,0);
 499         var steps = self.getTotalSteps();
 500         var total_steps = steps;
 501         var loop;
 502         loop = function () {
 503             if (steps >= 0) {
 504                 //Crazy workaround for chromium
 505                 ($("link.sws-theme[rel='stylesheet']")[0]).disabled = false;
 506                 $(".sws-canvas").find("*").addBack().promise().done(function() {
 507                     var percent = ((total_steps - steps) / total_steps) * 100;
 508                     $("#sws-percent-progress").text(Math.round(percent));
 509                     SWS.Config['sws-slide-change'] = SWS.Templates.slideChange;
 510                     self.refresh();
 511                     $($(".sws-canvas")[self.getCurrentSlide()]).css('opacity', 1 );
 512                     self.next();
 513                     steps--;
 514                     loop();
 515                     })
 516             } else {
 517                 $("#sws-percent-progress").text(100);
 518                 progress.remove();
 519                 window.status = 'Ready';
 520                 $.fx.off = old_fx_status;
 521
 522             }
 523         };
 524         loop();
 525
 526     }
 527
 528     self.buildFullTOC = function () {
 529
 530         var build_sections = function (doc) {
 531             var res = [];
 532             var h1s = doc.find("body").first().children("h1");
 533             var slides = doc.find("body").first().children(".sws-slide");
 534             var slide_num = 1;
 535             var collection = h1s.add(slides);
 536             collection.each (function () {
 537                 if ($(this).is("h1")) {
 538                     res.push({ 'title' : $(this).text(),
 539                                'slide' : slide_num });
 540                 } else {
 541                     slide_num++;
 542                 }
 543             });
 544             return res;
 545         };
 546
 547         var toc = [];
 548
 549         var append = function (a,e) {
 550             return a.push(e);
 551         };
 552         var prepend = function (a,e) {
 553             return a.unshift(e);
 554         };
 555
 556         var loop = function (doc, dir, add, ignoreFirst) {
 557             if (ignoreFirst !== true) {
 558                 var this_toc = { 'title' : doc.find("title").first().text()
 559                                  .replace ("&", "&amp;")
 560                                  .replace("'","&apos;")
 561                                  .replace('"', "&quot;")
 562                                  .replace("<", "&lt;")
 563                                  .replace(">", "&gt;"),
 564                                  'sections' : build_sections(doc) };
 565                 add(toc, this_toc);
 566             };
 567             var url = doc.find(dir).first().attr("href");
 568             if (!SWS.Utils.isUndefined(url) && url != "") {
 569                 $.ajax({ 'url' : url, 'async' : false ,'success' : function (page) {
 570                     loop ($(page), dir, add, false);
 571                 }});
 572             };
 573         };
 574         loop ($(document), ".sws-previous", prepend, false);
 575         return toc;
 576
 577     };
 578
 579
 580
 581     var _startTouch = null;
 582
 583     self.inputHandler = function (event) {
 584         if (_disable_input_events || _print_mode) return;
 585         var code = 0;
 586         switch (event.type) {
 587         case 'touchstart':
 588             _startTouch = event.changedTouches[0];
 589             return;
 590         case 'touchend':
 591             if (!_startTouch) return;
 592             var _endTouch = event.changedTouches[0];
 593             var Xdist = _endTouch.clientX - _startTouch.clientX;
 594             var Ydist = _endTouch.clientY - _startTouch.clientY;
 595             if (Xdist > 40) code = 39
 596             else if (Xdist < -40) code = 37
 597             else if (Ydist > 20 && !$("#sws-control-panel-canvas").is(":visible")) code = 67;
 598             else if (Ydist < -20  && $("#sws-control-panel-canvas").is(":visible")) code = 67;
 599             else code = 39;
 600             break;
 601         case 'keydown':
 602             code = event.which;
 603             break;
 604         default:
 605             return;
 606         };
 607
 608         switch (code) {
 609         case 36:/* Home */
 610             self.setCurrentSlide(self.firstSlide());
 611             break;
 612
 613         case 35:/* End */
 614             self.setCurrentSlide(self.lastSlide());
 615             break;
 616         case 32: /* space */
 617         case 34: /* PgDown */
 618         case 39: /* -> */
 619         case 176: /* Multimedia skip forward */
 620         case 179: /* Multimedia play/pause */
 621             if (self.getCurrentSlide() == self.lastSlide()
 622                 && self.getCurrentFrame() == self.lastFrame()) return;
 623             self.next();
 624             break;
 625         case 78: /* n */
 626             self.nextSlide();
 627             break;
 628         case 8: /* backspace */
 629         case 33: /* PgUp */
 630         case 37: /* <-   */
 631         case 177: /* Multimedia skip backward */
 632             self.previous();
 633             break;
 634         case 80: /* p */
 635             self.previousSlide();
 636             break;
 637         case 83: /* s */
 638                 self.cycleStyle();
 639             return;
 640         case 67: /* c */
 641             $("#sws-control-panel-canvas").toggle();
 642             return;
 643         case 72: /* h */
 644             $("#sws-help-panel-canvas").toggle();
 645
 646         default:
 647             return;
 648         };
 649         self.refresh();
 650 };
 651
 652
 653
 654     function init_canvas(canvas, custom) {
 655         var cur_frame = 0;
 656         var last_frame = canvas.find(".sws-pause").length;
 657         //Add all regular elements to the frame list
 658         var slide = $(canvas.find(".sws-slide")[0]);
 659
 660         var callbacks = { at_slide : new Array(),
 661                           at_frame : new Array() }
 662
 663         if (SWS.Utils.isUndefined(custom)) {
 664             custom = new Array ();
 665         };
 666
 667         for (var i = 0; i < custom.length; i++) {
 668             if (isFinite(custom[i].frame)){
 669                 var num = +(custom[i].frame);
 670                 if (num > last_frame) last_frame = num;
 671                 SWS.Utils.push2(callbacks.at_frame, num, custom[i].fn);
 672             } else if (custom[i].frame == "slide")
 673                 callbacks.at_slide.push(custom[i].fn);
 674             else {
 675                 var frame_set = SWS.Utils.parseFrameSpec(custom[i].frame);
 676                 for(var f in frame_set){
 677                     if (f > last_frame) last_frame = f;
 678                     SWS.Utils.push2(callbacks.at_frame, +(f), custom[i].fn);
 679                 };
 680             }
 681         };
 682
 683         var specials = $([]);
 684
 685         slide.find('*[class*="sws-onframe-"]').each(function(_){
 686             var cls = $(this).attr('class');
 687             var idx = cls.indexOf("sws-onframe-");
 688             if (idx >= 0) {
 689                 var end = cls.indexOf(" ", idx);
 690                 end = (end == -1) ? cls.length : end;
 691                 var spec = cls.substring(idx+12, end);
 692                 var o = SWS.Utils.parseFrameSpec(spec);
 693                 for(var f in o)
 694                     if (f > last_frame) last_frame = f;
 695                 $(this).find("*").andSelf().each(function(_){
 696                     if (!SWS.Utils.isEmpty(o)){
 697                         $(this).data("sws-frame-set", o);
 698                     }
 699                     specials = specials.add($(this));
 700                 });
 701             };
 702         });
 703
 704         slide.find("*").andSelf().not(specials).each(function(i) {
 705             if ($(this).hasClass("sws-pause"))  cur_frame++;
 706             var o = {};
 707             for (var j = cur_frame; j <= last_frame; j++)
 708                 o[ j ] = true;
 709             if (!SWS.Utils.isEmpty(o))
 710                 $(this).data("sws-frame-set", o);
 711         });
 712
 713         canvas.data("sws-frame-info", { current: 0,
 714                                         last: (last_frame - 0), // force cast to integer
 715                                         callbacks: callbacks
 716                                       });
 717
 718     };
 719
 720     /* Forces redrawing the page without reloading */
 721     self.redraw = function (f) {
 722         if (SWS.Utils.isUndefined(f))
 723             $("body").hide().show(400, function () {
 724                 $("body").css("display","block");
 725                 if (!SWS.Utils.isUndefined(f))
 726                     f();
 727             });
 728     };
 729     self.changeAspect = function() {
 730         if (_print_mode) return;
 731         var newClass = $("#sws-aspect-select").val();
 732         var args = newClass.split("-");
 733         var targetRatio = (args[2] - 0) / (args[3] - 0);
 734         var realRatio = window.innerWidth / window.innerHeight;
 735         var byClass = (targetRatio > realRatio ) ? "sws-by-height" : "sws-by-width";
 736         if ($("html").hasClass(newClass)
 737             && $("html").hasClass(byClass))
 738             return;
 739
 740         $("html").removeClass("sws-aspect-4-3")
 741             .removeClass("sws-aspect-16-9")
 742             .removeClass("sws-aspect-16-10")
 743             .removeClass("sws-by-width")
 744             .removeClass("sws-by-height")
 745             .addClass(newClass).addClass(byClass);
 746         self.redraw();
 747     };
 748
 749     self.getCurrentTheme = function () {
 750         var l = $("link.sws-theme[rel='stylesheet']")[0];
 751
 752         if (l) {
 753             return  l.title;
 754         } else
 755             return ""
 756     };
 757
 758     self.changeTheme = function (name) {
 759         var theme_name;
 760         if (typeof name === 'undefined')
 761             theme_name = $("#sws-theme-select").val()
 762         else
 763             theme_name = name;
 764
 765         _current_theme = theme_name;
 766         $("link.sws-theme").each (function (i) {
 767             var e = this;
 768             var title =  e.title;
 769             if (title == theme_name) {
 770                 e.rel = "stylesheet";
 771                 e.disabled = false;
 772                 e.media="all";
 773             } else {
 774                 e.rel = "alternate stylesheet";
 775                 e.disabled = true;
 776                 e.media="all";
 777             };
 778         });
 779         self.redraw();
 780
 781     };
 782
 783     self.openPrint = function () {
 784         window.open ("?mode=print&theme=" + self.getCurrentTheme());
 785     }
 786     var _fullscreen_icon_on = "&#xe746;";
 787     var _fullscreen_icon_off = "&#xe744;";
 788
 789     self.toggleFullScreen = function () {
 790         if (SWS.Fullscreen.status()) {
 791             SWS.Fullscreen.exit();
 792             $("a#sws-control-panel-fullscreen")
 793                 .html(_fullscreen_icon_off);
 794
 795
 796
 797         } else {
 798             SWS.Fullscreen.enter($("body")[0]);
 799             $("a#sws-control-panel-fullscreen")
 800                 .html(_fullscreen_icon_on);
 801         };
 802     };
 803     function _update_ui() {
 804         var nav = $('#sws-control-panel-navigation-bar');
 805         nav.val(SWS.Presentation.getCurrentSlide() + 1);
 806         $('#sws-control-panel-slide-input').val(nav.val());
 807     }
 808     self.navigate = function () {
 809         self.goToSlide($("#sws-control-panel-navigation-bar").val()-1);
 810         _update_ui();
 811     };
 812
 813
 814     self.init = function () {
 815
 816
 817         $("html").addClass("sws-display");
 818         //$(window).resize(self.redraw);
 819
 820         var slides = $(".sws-slide");
 821         var h1s = $("body").children("h1");
 822         var slide_num = slides.add(h1s).length - 1;
 823
 824         _total_slides = $(".sws-slide").add($("body").children("h1")).length;
 825
 826         var cur = self.getCurrentSlide();
 827         var toc = self.buildFullTOC();
 828         var common_html = "<div class='sws-slide sws-toc'><h1>Plan</h1><ul style='list-style-type:none'>";
 829         var i;
 830         for (i= 0; i < toc.length - 1; i++)
 831             common_html += "<li class='done'>" + (i+1) +
 832             ' ' + toc[i].title + "</li>";
 833
 834         common_html += "<li>" + toc.length + ' ' + toc[toc.length - 1].title;
 835         common_html += "<ul style='list-style-type:none' >";
 836         var sections = toc[toc.length - 1].sections;
 837         $("body").children("h1").each(function (i) {
 838             var this_html = common_html;
 839             var j;
 840             var secnum = toc.length + '.';
 841             for (j = 0; j < i; ++j)
 842                 this_html += "<li class='done'>" + secnum + (j+1) + ' ' +
 843                 sections[j].title + "</li>";
 844             this_html += "<li class='hl'>" + secnum + (i+1) + ' ' +
 845                 sections[i].title + "</li>";
 846             for (j = i+1; j < sections.length; j++)
 847                 this_html += "<li>" + secnum + (j+1) + ' '
 848                 +sections[j].title + "</li>";
 849             this_html += "</ul></li></ul></div>";
 850             $(this).after(this_html);
 851         });
 852
 853         $(".sws-slide").each(function (i) {
 854
 855             var par = $(this).parent();
 856
 857
 858             $(this).remove();
 859             var canvas = $('<div class="sws-canvas"/>');
 860
 861             if (!($(this).hasClass("sws-option-noheader"))) {
 862                 canvas.append($('<div class="sws-header"/>'));
 863             };
 864
 865             if (!$(this).hasClass("sws-cover")) {
 866                 var title = $($(this).find("h1")[0]);
 867                 var title_div = $('<div class="sws-title" />');
 868                 title_div.append(title);
 869                 canvas.append(title_div);
 870             };
 871
 872             var inner = $('<div class="sws-inner-canvas"/>');
 873             var content = $('<div class="sws-content"/>');
 874             $(this).find('script[type="text/javascript"]').remove();
 875             content.append($(this));
 876             inner.append(content);
 877             canvas.append(inner);
 878             var that = this;
 879             [ "sws-cover", "sws-toc" ].forEach(
 880                 function(v) {
 881                     if ($(that).hasClass(v)) {
 882                         inner.addClass(v);
 883                         $(that).removeClass(v);
 884                     }
 885                 });
 886
 887             if (!($(this).hasClass("sws-option-nofooter"))) {
 888                 canvas.append($('<div class="sws-footer"/>'));
 889             };
 890
 891             par.append(canvas);
 892
 893             if (i == cur) {
 894                 canvas
 895                     .addClass("sws-active-slide")
 896                     .removeClass("sws-inactive-slide");
 897             } else {
 898                 canvas
 899                     .addClass("sws-inactive-slide")
 900                     .removeClass("sws-active-slide");
 901             };
 902             init_canvas(canvas,_slide_callbacks[i]);
 903
 904         });
 905
 906         // Initialize the control panel
 907         $("body").append($(SWS.Templates.controlPanel));
 908         $("body").append($(SWS.Templates.helpPanel));
 909         // Fill the theme switcher
 910         $("link.sws-theme").each (function (i) {
 911             var e = $(this);
 912             var opt = "<option value='";
 913             opt += e.attr("title");
 914             opt += "' ";
 915             if (e.attr("rel") == "stylesheet") {
 916                 opt+= "selected='selected'";
 917             };
 918             opt += ">" + e.attr("title") + "</option>";
 919             $("#sws-theme-select").append($(opt));
 920         });
 921         // Set the fullscreen icon
 922         if (SWS.Fullscreen.status()) {
 923             $("a#sws-control-panel-fullscreen")
 924                 .html(_fullscreen_icon_on);
 925         } else {
 926             $("a#sws-control-panel-fullscreen")
 927                 .html(_fullscreen_icon_off);
 928         };
 929         // Put the navigation range at the correct position
 930         var nav = $('#sws-control-panel-navigation-bar');
 931         nav.attr("min", SWS.Presentation.firstSlide() + 1);
 932         nav.attr("max", SWS.Presentation.lastSlide() + 1);
 933         $('#sws-control-panel-total-slides').text('/' + SWS.Presentation.getNumSlides());
 934         _update_ui();
 935         _slide_callbacks = null; /* avoid a leak */
 936         var passed_theme = SWS.Utils.getParameterByName("theme");
 937
 938
 939         //workaround weird chrome CSS loading bug
 940         var f =
 941             function () {
 942                 if (passed_theme == "")
 943                     self.changeTheme();
 944                 else
 945                     self.changeTheme(passed_theme);
 946                 if (SWS.Utils.getParameterByName("mode") == "print") {
 947                     self.printMode();
 948                 }
 949                 else {
 950                     if (self.showHelpAtStartup()) $("#sws-help-panel-canvas").show().delay(5000).hide();
 951                     self.changeAspect();
 952                     self.refresh();
 953                 };
 954                 $(document).keydown(self.inputHandler);
 955                 document.body.addEventListener('touchstart',self.inputHandler, false);
 956                 document.body.addEventListener('touchend',self.inputHandler, false);
 957                 $(window).resize(self.changeAspect);
 958                 _initialized = true;
 959             };
 960         //setTimeout(f, 100);
 961         f();
 962     };
 963
 964 };