skins/photo_film_viewer.js

   1 /*
   2 copyright 2008-2014 Benoit Pin - Centre de recherche en informatique - MINES ParisTech
   3 http://plinn.org
   4 Licence Creative Commons http://creativecommons.org/licenses/by-nc/2.0/
   5 */
   6
   7 var FilmSlider;
   8
   9 (function(){
  10
  11 var keyLeft = 37, keyRight = 39;
  12 var isTextMime = /^text\/.+/i;
  13 var isAddToSelection = /.*\/add_to_selection$/;
  14 var imgRequestedSize = /size=(\d+)/;
  15 var DEFAULT_IMAGE_SIZES = [500, 600, 800];
  16
  17 FilmSlider = function(filmBar, slider, ctxInfos, image, toolbar, breadcrumbs) {
  18         var thisSlider = this;
  19         this.filmBar = filmBar;
  20         var film = filmBar.firstChild;
  21         if (film.nodeType === 3) { film = film.nextSibling; }
  22         this.film = film;
  23         this.slider = slider;
  24         this.rail = slider.parentNode;
  25         this.sliderSpeedRatio = undefined;
  26         this.sliderRatio = undefined;
  27         this.selectedSlide = undefined;
  28         this.selectedSlideInSelection = undefined;
  29         this.cartSlide = document.getElementById('cart_slide');
  30         this.image = image;
  31         this.stretchable = image.parentNode;
  32         this.viewMode = 'medium';
  33
  34         this.buttons = [];
  35         this.toolbar = toolbar;
  36         if (breadcrumbs) {
  37                 var bcElements = breadcrumbs.getElementsByTagName('a');
  38                 this.lastBCElement = bcElements[bcElements.length-1];
  39                 var imgSrcParts = image.src.split('/');
  40                 this.lastBCElement.innerHTML = imgSrcParts[imgSrcParts.length-2];
  41                 this.hasBreadcrumbs = true;
  42         }
  43         else {
  44                 this.hasBreadcrumbs = false;
  45         }
  46
  47         var buttons = toolbar.getElementsByTagName('img');
  48         var b, name, i;
  49         for (i=0 ; i<buttons.length ; i++) {
  50                 b = buttons[i];
  51                 name = b.getAttribute('name');
  52                 if (name) { this.buttons[name] = b; }
  53         }
  54
  55         this.pendingImage = new Image();
  56         this.pendingImage.onload = function() {
  57                 thisSlider.refreshImage();
  58         };
  59         this.initialized = false;
  60
  61         this.film.style.left='0';
  62         this.film.style.top='0';
  63
  64         this.filmLength = ctxInfos.filmLength;
  65         this.center = ctxInfos.center;
  66         this.slideSize = ctxInfos.slideSize;
  67         this.ctxUrlTranslation = ctxInfos.ctxUrlTranslation;
  68
  69         this.ddHandlers = {'down' : function(evt){thisSlider.mouseDownHandler(evt);},
  70                                            'move' : function(evt){thisSlider.mouseMoveHandler(evt);},
  71                                            'up' :       function(evt){thisSlider.mouseUpHandler(evt);},
  72                                            'out' :      function(evt){thisSlider.mouseOutHandler(evt);}
  73                                           };
  74
  75         this.resizeSlider();
  76         this.addEventListeners();
  77 };
  78
  79
  80 FilmSlider.prototype.resizeSlider = function(evt) {
  81         var filmBarWidth = getObjectWidth(this.filmBar);
  82         if (!filmBarWidth) {
  83                 var thisSlider = this;
  84                 addListener(window, 'load', function(evt){thisSlider.resizeSlider(evt);});
  85                 return;
  86         }
  87
  88         var filmWidth = this.slideSize * this.filmLength;
  89         var sliderRatio = this.sliderRatio =  filmBarWidth / filmWidth;
  90         var sliderWidth = filmBarWidth * sliderRatio;
  91         this.rail.style.width = filmBarWidth + 'px';
  92         this.rail.style.display = 'block';
  93         this.rail.style.visibility = 'visible';
  94         if (sliderRatio < 1) {
  95                 this.slider.style.width = Math.round(sliderWidth) + 'px';
  96                 this.slider.style.visibility = 'visible';
  97         }
  98         else {
  99                 this.slider.style.visibility = 'hidden';
 100         }
 101
 102         this.winSize = {'width'  : getWindowWidth(),
 103                                         'height' : getWindowHeight()};
 104         this.maxRightPosition = filmBarWidth - sliderWidth;
 105         this.sliderSpeedRatio = - (filmBarWidth - sliderWidth) / (filmWidth - filmBarWidth);
 106         if (!this.initialized) {
 107                 this.centerSlide(this.center);
 108                 this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 109                 this.initialized = true;
 110         }
 111 };
 112
 113 FilmSlider.prototype.fitToScreen = function(evt) {
 114         this._fitToScreen();
 115         var thisSlider = this;
 116         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 117 };
 118
 119 FilmSlider.prototype._fitToScreen = function(evt) {
 120         var wh = getWindowHeight();
 121         var rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 122         var delta = wh - rb;
 123         var sh = getObjectHeight(this.stretchable);
 124         var newSize = sh + delta;
 125         this.stretchable.style.height = newSize + 'px';
 126
 127         var ratio = this.image.height / this.image.width;
 128         var bestFitSize = this.getBestFitSize(ratio);
 129         var currentSize = parseInt(imgRequestedSize.exec(this.image.src)[1], 10);
 130         if (currentSize !== bestFitSize) {
 131                 var src = this.image.src.replace(imgRequestedSize, 'size=' + bestFitSize);
 132                 this.pendingImage.src = src;
 133         }
 134 };
 135
 136 FilmSlider.prototype.getBestFitSize = function(ratio) {
 137         var fw = getObjectWidth(this.stretchable) - 1;
 138         var fh = getObjectHeight(this.stretchable) - 1;
 139
 140         var i, irw, irh;
 141         if (ratio < 1) {
 142                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 143                         irw = DEFAULT_IMAGE_SIZES[i];
 144                         irh = irw * ratio;
 145                         if (irw <= fw && irh <= fh) { break; }
 146                 }
 147         }
 148         else {
 149                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 150                         irh = DEFAULT_IMAGE_SIZES[i];
 151                         irw = irh / ratio;
 152                         if (irw <= fw && irh <= fh) { break; }
 153                 }
 154         }
 155         return DEFAULT_IMAGE_SIZES[i];
 156 };
 157
 158 FilmSlider.prototype.centerSlide = function(slideIndex) {
 159         if (this.sliderRatio > 1) { return; }
 160         var filmBarWidth = getObjectWidth(this.filmBar);
 161         var x = slideIndex * this.slideSize;
 162         x = x - (filmBarWidth - this.slideSize) / 2.0;
 163         x = x * this.sliderSpeedRatio;
 164         var p = new Point( -x, 0 );
 165         this.setSliderPosition(p);
 166 };
 167
 168 FilmSlider.prototype.setSliderPosition = function(point) {
 169         if(point.x < 0) { point.x = 0; }
 170         if (point.x > this.maxRightPosition) { point.x = this.maxRightPosition; }
 171         this.slider.style.left = point.x + 'px';
 172         this.setFilmPosition(point);
 173 };
 174
 175 FilmSlider.prototype.setFilmPosition = function(point) {
 176         this.film.style.left = point.x / this.sliderSpeedRatio + 'px';
 177 };
 178
 179 FilmSlider.prototype.getSliderPosition = function() {
 180         var x = parseInt(this.slider.style.left, 10);
 181         var y = parseInt(this.slider.style.top, 10);
 182         var p = new Point(x, y);
 183         return p;
 184 };
 185
 186 FilmSlider.prototype.getFilmPosition = function() {
 187         var x = parseInt(this.film.style.left, 10);
 188         var y = parseInt(this.film.style.top, 10);
 189         var p = new Point(x, y);
 190         return p;
 191 };
 192
 193 FilmSlider.prototype.loadSibling = function(previous) {
 194         var slide = null;
 195         if (previous) {
 196                 slide = this.selectedSlide.parentNode.previousSibling;
 197                 if (slide && slide.nodeType===3) { slide = slide.previousSibling; }
 198         }
 199         else {
 200                 slide = this.selectedSlide.parentNode.nextSibling;
 201                 if (slide && slide.nodeType===3) { slide = slide.nextSibling; }
 202         }
 203
 204         if (!slide) { return; }
 205         else {
 206                 var target = slide.getElementsByTagName('a')[0];
 207                 raiseMouseEvent(target, 'click');
 208                 var index = parseInt(target.getAttribute('portfolio:position'), 10);
 209                 this.centerSlide(index);
 210         }
 211 };
 212
 213 FilmSlider.prototype.addEventListeners = function() {
 214         var thisSlider = this;
 215         addListener(window, 'resize', function(evt){thisSlider.resizeSlider(evt);});
 216         addListener(this.filmBar, 'click', function(evt){thisSlider.thumbnailClickHandler(evt);});
 217         addListener(this.toolbar, 'click', function(evt){thisSlider.toolbarClickHandler(evt);});
 218         addListener(window, 'load', function(evt){thisSlider.fitToScreen(evt);});
 219
 220         // dd listeners
 221         addListener(this.slider, 'mousedown', this.ddHandlers.down);
 222         if(browser.isDOM2Event){
 223                 if (browser.isAppleWebKit) {
 224                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 225                 }
 226                 else {
 227                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 228                 }
 229         }
 230         else if (browser.isIE6up) {
 231                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 232         }
 233
 234         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 235         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 236 };
 237
 238
 239 FilmSlider.prototype.mouseDownHandler = function(evt) {
 240         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 241         this.initialPosition = this.getSliderPosition();
 242         this.dragInProgress = true;
 243         addListener(document, 'mousemove', this.ddHandlers.move);
 244         addListener(document, 'mouseup', this.ddHandlers.up);
 245         addListener(document.body, 'mouseout', this.ddHandlers.out);
 246 };
 247
 248
 249 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 250         if(!this.dragInProgress) { return; }
 251
 252         clearSelection();
 253         evt = getEventObject(evt);
 254         var currentPoint = new Point(evt.clientX, evt.clientY);
 255         var displacement = currentPoint.diff(this.initialClickPoint);
 256         this.setSliderPosition(this.initialPosition.add(displacement));
 257 };
 258
 259 FilmSlider.prototype.mouseUpHandler = function(evt) {
 260         this.dragInProgress = false;
 261         evt = getEventObject(evt);
 262         this.mouseMoveHandler(evt);
 263 };
 264
 265
 266 FilmSlider.prototype.mouseOutHandler = function(evt) {
 267         evt = getEventObject(evt);
 268         var x = evt.clientX;
 269         var y = evt.clientY;
 270         if (x < 0 ||
 271                 x > this.winSize.width ||
 272                 y < 0 ||
 273                 y > this.winSize.height
 274                 ) {
 275                 this.mouseUpHandler(evt);
 276         }
 277 };
 278
 279 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 280         var target = getTargetedObject(evt);
 281         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 282         if (target.tagName !== 'A') { return; }
 283         else {
 284                 if (this.viewMode === 'full') {
 285                         this.mosaique.unload();
 286                         this.mosaique = null;
 287                         this.viewMode = 'medium';
 288                 }
 289                 disableDefault(evt);
 290                 disablePropagation(evt);
 291                 target.blur();
 292                 history.pushState(target.href, '', target.href);
 293
 294                 var imgBaseUrl = target.href;
 295                 var canonicalImgUrl;
 296                 if (this.ctxUrlTranslation[0]) {
 297                         canonicalImgUrl = imgBaseUrl.replace(this.ctxUrlTranslation[0],
 298                                                                                                  this.ctxUrlTranslation[1]);
 299                 }
 300                 else { canonicalImgUrl = imgBaseUrl; }
 301
 302                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 303                 var thisFS = this;
 304
 305                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 306                 var thumbnail = target.getElementsByTagName('IMG')[0];
 307                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 308                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 309
 310                 // update buttons
 311                 var fullScreenLink = this.buttons.full_screen.parentNode;
 312                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 313
 314                 var toggleSelectionBtn = this.buttons.toggle_selection;
 315                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 316                 this.selectedSlideInSelection = (target.className==='selected');
 317                 if (this.selectedSlideInSelection) {
 318                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 319                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 320                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 321                 }
 322                 else {
 323                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 324                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 325                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 326                 }
 327
 328                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 329                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 330                 this.cartSlide.innerHTML = '';
 331                 this.cartSlide.style.visibility='hidden';
 332
 333
 334                 var metadataButton = this.buttons.edit_metadata;
 335                 if (metadataButton) {
 336                         var metadataEditLink = metadataButton.parentNode;
 337                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 338                 }
 339
 340
 341                 var req = new XMLHttpRequest();
 342                 req.onreadystatechange = function() {
 343                         switch (req.readyState) {
 344                                 case 1 :
 345                                         showProgressImage();
 346                                         break;
 347                                 case 2 :
 348                                         try {
 349                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 350                                                         req.onreadystatechange = null;
 351                                                         req.abort();
 352                                                         hideProgressImage();
 353                                                         window.location.href = thisFS._fallBackUrl;
 354                                                 }
 355                                         }
 356                                         catch(e){}
 357                                         break;
 358                                 case 4 :
 359                                         hideProgressImage();
 360                                         if (req.status === 200) { thisFS.populateViewer(req); }
 361                                         break;
 362                         }
 363                 };
 364
 365                 req.open("GET", ajaxUrl, true);
 366                 req.send(null);
 367
 368                 // update old displayed slide className
 369                 var className = this.selectedSlide.className;
 370                 var classes = className.split(' ');
 371                 var newClasses = [];
 372                 var name, i;
 373
 374                 for (i=0 ; i<classes.length ;  i++) {
 375                         name = classes[i];
 376                         if (name !== 'displayed') {
 377                                 newClasses.push(name);
 378                         }
 379                 }
 380
 381                 this.selectedSlide.className = newClasses.join(' ');
 382
 383                 // hightlight new displayed slide
 384                 this.selectedSlide = target;
 385                 className = this.selectedSlide.className;
 386                 classes = className.split(' ');
 387                 classes.push('displayed');
 388                 this.selectedSlide.className = classes.join(' ');
 389         }
 390 };
 391
 392 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 393         var target = getTargetedObject(evt);
 394         var button, link, url;
 395         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 396                 switch(target.getAttribute('name')) {
 397                         case 'previous' :
 398                                 disableDefault(evt);
 399                                 disablePropagation(evt);
 400                                 button = target;
 401                                 link = button.parentNode;
 402                                 link.blur();
 403                                 this.loadSibling(true);
 404                                 break;
 405                         case 'next' :
 406                                 disableDefault(evt);
 407                                 disablePropagation(evt);
 408                                 button = target;
 409                                 link = button.parentNode;
 410                                 link.blur();
 411                                 this.loadSibling(false);
 412                                 break;
 413                         case 'full_screen':
 414                                 disableDefault(evt);
 415                                 disablePropagation(evt);
 416                                 target.parentNode.blur();
 417                                 if (this.viewMode === 'full') {
 418                                         this.mosaique.unload();
 419                                         this.mosaique = null;
 420                                         this.viewMode = 'medium';
 421                                         return;
 422                                 }
 423                                 var main = document.getElementById('photo_viewer');
 424                                 url = target.parentNode.href;
 425                                 url = url.substring(0, url.length - '/zoom_view'.length);
 426                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 427                                 this.mosaique = new Mosaique(main, url, margins);
 428                                 this.viewMode = 'full';
 429                                 break;
 430
 431                         case 'toggle_selection':
 432                                 disableDefault(evt);
 433                                 disablePropagation(evt);
 434                                 button = target;
 435                                 link = button.parentNode;
 436                                 link.blur();
 437
 438                                 var req = new XMLHttpRequest();
 439                                 url = link.href;
 440                                 req.open("POST", url, true);
 441                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 442                                 req.send("ajax=1");
 443
 444                                 // toggle button
 445                                 var parts = url.split('/');
 446                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 447
 448                                 if (isAddToSelection.test(url)) {
 449                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 450                                         button.alt = link.title = 'Retirer de la sélection';
 451                                         link.href = canonicalImgUrl + '/remove_to_selection';
 452                                         this.selectedSlide.className = 'selected displayed';
 453                                         this.image.parentNode.className = 'selected';
 454                                         this.selectedSlideInSelection = true;
 455                                 }
 456                                 else {
 457                                         button.src = portal_url() + '/select_flag_btn.gif';
 458                                         button.alt = link.title = 'Ajouter à la sélection';
 459                                         link.href = canonicalImgUrl + '/add_to_selection';
 460                                         this.selectedSlide.className = 'displayed';
 461                                         this.image.parentNode.className = '';
 462                                         this.selectedSlideInSelection = false;
 463                                 }
 464                                 break;
 465
 466                         case 'show_buyable':
 467                                 disableDefault(evt);
 468                                 disablePropagation(evt);
 469                                 button = target;
 470                                 link = button.parentNode;
 471                                 link.blur();
 472                                 var slide = this.cartSlide;
 473                                 slide.innerHTML = '';
 474                                 slide.style.visibility = 'visible';
 475                                 var cw = new CartWidget(slide, link.href);
 476                                 cw.onCancel = function() {
 477                                         CartWidget.prototype.onCancel.apply(this);
 478                                         slide.style.visibility = 'hidden';
 479                                 };
 480                                 cw.onAfterConfirm = function() {
 481                                         slide.style.visibility = 'hidden';
 482                                 };
 483                                 break;
 484
 485
 486
 487
 488                         /*
 489                         case 'edit_metadata' :
 490                                 disableDefault(evt);
 491                                 disablePropagation(evt);
 492                                 target.blur();
 493                                 if (this.viewMode === 'full') {
 494                                         this.mosaique.unload();
 495                                         this.mosaique = null;
 496                                         this.viewMode = 'medium';
 497                                         return;
 498                                 }
 499                                 var fi = new FragmentImporter(absolute_url());
 500                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 501                                 break;
 502                         */
 503                 }
 504         }
 505 };
 506
 507
 508 if(browser.isDOM2Event) {
 509         if (browser.isAppleWebKit) {
 510                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 511                         disableDefault(evt);
 512                         var pos = this.getSliderPosition();
 513                         pos.x -= evt.wheelDelta / 40;
 514                         this.setSliderPosition(pos);
 515                 };
 516         }
 517         else {
 518                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 519                         disableDefault(evt);
 520                         var pos = this.getSliderPosition();
 521                         pos.x += evt.detail * 3;
 522                         this.setSliderPosition(pos);
 523                 };
 524         }
 525 }
 526 else if (browser.isIE6up) {
 527         FilmSlider.prototype.mouseWheelHandler = function() {
 528                 var evt = window.event;
 529                 evt.returnValue = false;
 530                 var pos = this.getSliderPosition();
 531                 pos.x -= evt.wheelDelta / 40;
 532                 this.setSliderPosition(pos);
 533         };
 534 }
 535
 536 FilmSlider.prototype.keyDownHandler = function(evt) {
 537         evt = getEventObject(evt);
 538         switch (evt.keyCode) {
 539                 case keyLeft :
 540                         this.loadSibling(true);
 541                         break;
 542                 case keyRight :
 543                         this.loadSibling(false);
 544                         break;
 545                 default:
 546                         return;
 547         }
 548 };
 549
 550
 551 FilmSlider.prototype.keyPressHandler = function(evt) {
 552         var target = getTargetedObject(evt);
 553         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 554         evt = getEventObject(evt);
 555         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 556         switch(charPress) {
 557                 case 'f':
 558                 case 'F':
 559                         raiseMouseEvent(this.buttons.full_screen, 'click');
 560                         break;
 561         }
 562 };
 563
 564 FilmSlider.prototype.populateViewer = function(req) {
 565         var elements = req.responseXML.documentElement.childNodes;
 566         var i;
 567         for(i=0 ; i < elements.length ; i++ ) {
 568                 element = elements[i];
 569                 switch (element.nodeName) {
 570                         case 'fragment' :
 571                                 var dest = document.getElementById(element.getAttribute('id'));
 572                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 573                                 break;
 574                         case 'imageattributes' :
 575                                 var link = this.buttons.back_to_portfolio.parentNode;
 576                                 link.href = element.getAttribute('backToContextUrl');
 577                                 link = this.buttons.show_buyable.parentNode;
 578                                 var buyable = element.getAttribute('buyable');
 579                                 if(buyable === 'True') { link.className = null; }
 580                                 else if(buyable === 'False') { link.className = 'hidden'; }
 581                                 this.image.alt = element.getAttribute('alt');
 582                                 this.updateBreadcrumbs(element.getAttribute('lastBcUrl'),
 583                                                                            element.getAttribute('img_id'));
 584                                 break;
 585                 }
 586         }
 587 };
 588
 589 FilmSlider.prototype.refreshImage = function() {
 590         this.image.style.visibility = 'hidden';
 591         this.image.src = this.pendingImage.src;
 592         this.image.width = this.pendingImage.width;
 593         this.image.height = this.pendingImage.height;
 594         this.image.style.visibility = 'visible';
 595         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 596         else { this.image.parentNode.className = ''; }
 597 };
 598
 599 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 600         if (this.hasBreadcrumbs) {
 601                 this.lastBCElement.href = element.getAttribute('lastBcUrl');
 602                 this.lastBCElement.innerHTML = element.getAttribute('img_id');
 603         }
 604 };
 605
 606 FilmSlider.prototype.startSlideShow = function() {
 607         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 608         return this.slideShowSlide.href;
 609 };
 610
 611 FilmSlider.prototype.slideShowNext = function() {
 612         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 613         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 614
 615         if (nextSlide) {
 616                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 617                 this.pendingSlideShowSlide = nextSlide;
 618                 return this.pendingSlideShowSlide.href;
 619         }
 620         else {
 621                 var row = this.slideShowSlide.parentNode.parentNode;
 622                 var first = row.firstChild;
 623                 if (first.nodeType===3) { first = first.nextSibling; }
 624                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 625                 return this.pendingSlideShowSlide.href;
 626         }
 627 };
 628
 629 FilmSlider.prototype.slideShowPrevious = function() {
 630         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 631         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 632
 633         if (previousSlide) {
 634                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 635                 this.pendingSlideShowSlide = previousSlide;
 636                 return this.pendingSlideShowSlide.href;
 637         }
 638         else {
 639                 var row = this.slideShowSlide.parentNode.parentNode;
 640                 var last = row.lastChild;
 641                 if (last.nodeType===3) { last = last.previousSibling; }
 642                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 643                 return this.pendingSlideShowSlide.href;
 644         }
 645 };
 646
 647 FilmSlider.prototype.slideShowImageLoaded = function() {
 648         this.slideShowSlide = this.pendingSlideShowSlide;
 649 };
 650
 651 FilmSlider.prototype.stopSlideShow = function() {
 652         raiseMouseEvent(this.slideShowSlide, 'click');
 653         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 654         this.centerSlide(index);
 655 };
 656
 657
 658 /* UTILS */
 659 function Point(x, y) {
 660         this.x = Math.round(x);
 661         this.y = Math.round(y);
 662 }
 663 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 664 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 665 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 666 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 667
 668 }());