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         this.filmBarWidth = getObjectWidth(this.filmBar);
  21         var film = filmBar.firstChild;
  22         if (film.nodeType === 3) { film = film.nextSibling; }
  23         this.film = film;
  24         this.slider = slider;
  25         this.rail = slider.parentNode;
  26         this.sliderSpeedRatio = undefined;
  27         this.sliderRatio = undefined;
  28         this.selectedSlide = undefined;
  29         this.selectedSlideInSelection = undefined;
  30         this.cartSlide = document.getElementById('cart_slide');
  31         this.image = image;
  32         this.stretchable = image.parentNode;
  33         this.viewMode = 'medium';
  34
  35         this.buttons = [];
  36         this.toolbar = toolbar;
  37         if (breadcrumbs) {
  38                 var bcElements = breadcrumbs.getElementsByTagName('a');
  39                 this.lastBCElement = bcElements[bcElements.length-1];
  40                 var imgSrcParts = image.src.split('/');
  41                 this.lastBCElement.innerHTML = imgSrcParts[imgSrcParts.length-2];
  42                 this.hasBreadcrumbs = true;
  43         }
  44         else {
  45                 this.hasBreadcrumbs = false;
  46         }
  47
  48         var buttons = toolbar.getElementsByTagName('img');
  49         var b, name, i;
  50         for (i=0 ; i<buttons.length ; i++) {
  51                 b = buttons[i];
  52                 name = b.getAttribute('name');
  53                 if (name) { this.buttons[name] = b; }
  54         }
  55
  56         this.pendingImage = new Image();
  57         this.pendingImage.onload = function() {
  58                 thisSlider.refreshImage();
  59         };
  60         this.initialized = false;
  61
  62         this.film.style.left='0';
  63         this.film.style.top='0';
  64
  65         this.filmLength = ctxInfos.filmLength;
  66         this.center = ctxInfos.center;
  67         this.slideSize = ctxInfos.slideSize;
  68         this.ctxUrlTranslation = ctxInfos.ctxUrlTranslation;
  69
  70         this.ddHandlers = {'down' : function(evt){thisSlider.mouseDownHandler(evt);},
  71                                            'move' : function(evt){thisSlider.mouseMoveHandler(evt);},
  72                                            'up' :       function(evt){thisSlider.mouseUpHandler(evt);},
  73                                            'out' :      function(evt){thisSlider.mouseOutHandler(evt);}
  74                                           };
  75
  76         this.resizeSlider();
  77         this.addEventListeners();
  78 };
  79
  80
  81 FilmSlider.prototype.resizeSlider = function(evt) {
  82         var filmBarWidth = this.filmBarWidth;
  83         if (!filmBarWidth) { return; }
  84         var filmWidth = this.slideSize * this.filmLength;
  85         var sliderRatio = this.sliderRatio =  filmBarWidth / filmWidth;
  86         var sliderWidth = filmBarWidth * sliderRatio;
  87         this.rail.style.width = filmBarWidth + 'px';
  88         this.rail.style.display = 'block';
  89         this.rail.style.visibility = 'visible';
  90         if (sliderRatio < 1) {
  91                 this.slider.style.width = Math.round(sliderWidth) + 'px';
  92                 this.slider.style.visibility = 'visible';
  93         }
  94         else {
  95                 this.slider.style.visibility = 'hidden';
  96         }
  97
  98         this.winSize = {'width'  : getWindowWidth(),
  99                                         'height' : getWindowHeight()};
 100         this.maxRightPosition = filmBarWidth - sliderWidth;
 101         this.sliderSpeedRatio = - (filmBarWidth - sliderWidth) / (filmWidth - filmBarWidth);
 102         if (!this.initialized) {
 103                 this.centerSlide(this.center);
 104                 this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 105                 this.initialized = true;
 106         }
 107 };
 108
 109 FilmSlider.prototype._checkSizeAfterLoad = function(evt) {
 110         this._barSizes = [];
 111         this.filmBarWidth = this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 112         this.resizeSlider();
 113         var self = this;
 114         this._checkSizeIntervalId = setInterval(function(evt){self._checkSize(evt);}, 25);
 115         setTimeout(function(evt){self._checkSizeStability();}, 250);
 116 };
 117
 118 FilmSlider.prototype._checkSize = function(evt) {
 119         this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 120         if (this._barSizes.length >= 2 &&
 121                 this._barSizes[this._barSizes.length-2] !== this._barSizes[this._barSizes.length-1]) {
 122                 this.filmBarWidth = this._barSizes[this._barSizes.length-1];
 123                 this.initialized = false;
 124                 this.resizeSlider();
 125         }
 126 };
 127
 128 FilmSlider.prototype._checkSizeStability = function(evt) {
 129         var self = this;
 130         var i;
 131         for (i=0 ; i<this._barSizes.length - 1 ; i++) {
 132                 if (this._barSizes[i] !== this._barSizes[i+1]) {
 133                         this._barSizes = [];
 134                         setTimeout(function(evt){self._checkSizeStability();}, 250);
 135                         return;
 136                 }
 137         }
 138         clearInterval(this._checkSizeIntervalId);
 139         delete this._barSizes, this._checkSizeIntervalId;
 140 };
 141
 142 FilmSlider.prototype.fitToScreen = function(evt) {
 143         this._fitToScreen();
 144         var thisSlider = this;
 145         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 146 };
 147
 148 FilmSlider.prototype._fitToScreen = function(evt) {
 149         var wh = getWindowHeight();
 150         var rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 151         var delta = wh - rb;
 152         var sh = getObjectHeight(this.stretchable);
 153         var newSize = sh + delta;
 154         this.stretchable.style.height = newSize + 'px';
 155
 156         var ratio = this.image.height / this.image.width;
 157         var bestFitSize = this.getBestFitSize(ratio);
 158         var currentSize = parseInt(imgRequestedSize.exec(this.image.src)[1], 10);
 159         if (currentSize !== bestFitSize) {
 160                 var src = this.image.src.replace(imgRequestedSize, 'size=' + bestFitSize);
 161                 this.pendingImage.src = src;
 162         }
 163 };
 164
 165 FilmSlider.prototype.getBestFitSize = function(ratio) {
 166         var fw = getObjectWidth(this.stretchable) - 1;
 167         var fh = getObjectHeight(this.stretchable) - 1;
 168
 169         var i, irw, irh;
 170         if (ratio < 1) {
 171                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 172                         irw = DEFAULT_IMAGE_SIZES[i];
 173                         irh = irw * ratio;
 174                         if (irw <= fw && irh <= fh) { break; }
 175                 }
 176         }
 177         else {
 178                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 179                         irh = DEFAULT_IMAGE_SIZES[i];
 180                         irw = irh / ratio;
 181                         if (irw <= fw && irh <= fh) { break; }
 182                 }
 183         }
 184         return DEFAULT_IMAGE_SIZES[i];
 185 };
 186
 187 FilmSlider.prototype.centerSlide = function(slideIndex) {
 188         if (this.sliderRatio > 1) { return; }
 189         var filmBarWidth = getObjectWidth(this.filmBar);
 190         var x = slideIndex * this.slideSize;
 191         x = x - (filmBarWidth - this.slideSize) / 2.0;
 192         x = x * this.sliderSpeedRatio;
 193         var p = new Point( -x, 0 );
 194         this.setSliderPosition(p);
 195 };
 196
 197 FilmSlider.prototype.setSliderPosition = function(point) {
 198         if(point.x < 0) { point.x = 0; }
 199         if (point.x > this.maxRightPosition) { point.x = this.maxRightPosition; }
 200         this.slider.style.left = point.x + 'px';
 201         this.setFilmPosition(point);
 202 };
 203
 204 FilmSlider.prototype.setFilmPosition = function(point) {
 205         this.film.style.left = point.x / this.sliderSpeedRatio + 'px';
 206 };
 207
 208 FilmSlider.prototype.getSliderPosition = function() {
 209         var x = parseInt(this.slider.style.left, 10);
 210         var y = parseInt(this.slider.style.top, 10);
 211         var p = new Point(x, y);
 212         return p;
 213 };
 214
 215 FilmSlider.prototype.getFilmPosition = function() {
 216         var x = parseInt(this.film.style.left, 10);
 217         var y = parseInt(this.film.style.top, 10);
 218         var p = new Point(x, y);
 219         return p;
 220 };
 221
 222 FilmSlider.prototype.loadSibling = function(previous) {
 223         var slide = null;
 224         if (previous) {
 225                 slide = this.selectedSlide.parentNode.previousSibling;
 226                 if (slide && slide.nodeType===3) { slide = slide.previousSibling; }
 227         }
 228         else {
 229                 slide = this.selectedSlide.parentNode.nextSibling;
 230                 if (slide && slide.nodeType===3) { slide = slide.nextSibling; }
 231         }
 232
 233         if (!slide) { return; }
 234         else {
 235                 var target = slide.getElementsByTagName('a')[0];
 236                 raiseMouseEvent(target, 'click');
 237                 var index = parseInt(target.getAttribute('portfolio:position'), 10);
 238                 this.centerSlide(index);
 239         }
 240 };
 241
 242 FilmSlider.prototype.addEventListeners = function() {
 243         var thisSlider = this;
 244         addListener(window, 'resize', function(evt){thisSlider.resizeSlider(evt);});
 245         addListener(this.filmBar, 'click', function(evt){thisSlider.thumbnailClickHandler(evt);});
 246         addListener(this.toolbar, 'click', function(evt){thisSlider.toolbarClickHandler(evt);});
 247         addListener(window, 'load', function(evt){thisSlider.fitToScreen(evt);});
 248         addListener(window, 'load', function(evt){thisSlider._checkSizeAfterLoad(evt);});
 249
 250         // dd listeners
 251         addListener(this.slider, 'mousedown', this.ddHandlers.down);
 252         if(browser.isDOM2Event){
 253                 if (browser.isAppleWebKit) {
 254                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 255                 }
 256                 else {
 257                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 258                 }
 259         }
 260         else if (browser.isIE6up) {
 261                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 262         }
 263
 264         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 265         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 266 };
 267
 268
 269 FilmSlider.prototype.mouseDownHandler = function(evt) {
 270         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 271         this.initialPosition = this.getSliderPosition();
 272         this.dragInProgress = true;
 273         addListener(document, 'mousemove', this.ddHandlers.move);
 274         addListener(document, 'mouseup', this.ddHandlers.up);
 275         addListener(document.body, 'mouseout', this.ddHandlers.out);
 276 };
 277
 278
 279 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 280         if(!this.dragInProgress) { return; }
 281
 282         clearSelection();
 283         evt = getEventObject(evt);
 284         var currentPoint = new Point(evt.clientX, evt.clientY);
 285         var displacement = currentPoint.diff(this.initialClickPoint);
 286         this.setSliderPosition(this.initialPosition.add(displacement));
 287 };
 288
 289 FilmSlider.prototype.mouseUpHandler = function(evt) {
 290         this.dragInProgress = false;
 291         evt = getEventObject(evt);
 292         this.mouseMoveHandler(evt);
 293 };
 294
 295
 296 FilmSlider.prototype.mouseOutHandler = function(evt) {
 297         evt = getEventObject(evt);
 298         var x = evt.clientX;
 299         var y = evt.clientY;
 300         if (x < 0 ||
 301                 x > this.winSize.width ||
 302                 y < 0 ||
 303                 y > this.winSize.height
 304                 ) {
 305                 this.mouseUpHandler(evt);
 306         }
 307 };
 308
 309 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 310         var target = getTargetedObject(evt);
 311         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 312         if (target.tagName !== 'A') { return; }
 313         else {
 314                 if (this.viewMode === 'full') {
 315                         this.mosaique.unload();
 316                         this.mosaique = null;
 317                         this.viewMode = 'medium';
 318                 }
 319                 disableDefault(evt);
 320                 disablePropagation(evt);
 321                 target.blur();
 322                 history.pushState(target.href, '', target.href);
 323
 324                 var imgBaseUrl = target.href;
 325                 var canonicalImgUrl;
 326                 if (this.ctxUrlTranslation[0]) {
 327                         canonicalImgUrl = imgBaseUrl.replace(this.ctxUrlTranslation[0],
 328                                                                                                  this.ctxUrlTranslation[1]);
 329                 }
 330                 else { canonicalImgUrl = imgBaseUrl; }
 331
 332                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 333                 var thisFS = this;
 334
 335                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 336                 var thumbnail = target.getElementsByTagName('IMG')[0];
 337                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 338                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 339
 340                 // update buttons
 341                 var fullScreenLink = this.buttons.full_screen.parentNode;
 342                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 343
 344                 var toggleSelectionBtn = this.buttons.toggle_selection;
 345                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 346                 this.selectedSlideInSelection = (target.className==='selected');
 347                 if (this.selectedSlideInSelection) {
 348                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 349                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 350                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 351                 }
 352                 else {
 353                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 354                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 355                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 356                 }
 357
 358                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 359                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 360                 this.cartSlide.innerHTML = '';
 361                 this.cartSlide.style.visibility='hidden';
 362
 363
 364                 var metadataButton = this.buttons.edit_metadata;
 365                 if (metadataButton) {
 366                         var metadataEditLink = metadataButton.parentNode;
 367                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 368                 }
 369
 370
 371                 var req = new XMLHttpRequest();
 372                 req.onreadystatechange = function() {
 373                         switch (req.readyState) {
 374                                 case 1 :
 375                                         showProgressImage();
 376                                         break;
 377                                 case 2 :
 378                                         try {
 379                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 380                                                         req.onreadystatechange = null;
 381                                                         req.abort();
 382                                                         hideProgressImage();
 383                                                         window.location.href = thisFS._fallBackUrl;
 384                                                 }
 385                                         }
 386                                         catch(e){}
 387                                         break;
 388                                 case 4 :
 389                                         hideProgressImage();
 390                                         if (req.status === 200) { thisFS.populateViewer(req); }
 391                                         break;
 392                         }
 393                 };
 394
 395                 req.open("GET", ajaxUrl, true);
 396                 req.send(null);
 397
 398                 // update old displayed slide className
 399                 var className = this.selectedSlide.className;
 400                 var classes = className.split(' ');
 401                 var newClasses = [];
 402                 var name, i;
 403
 404                 for (i=0 ; i<classes.length ;  i++) {
 405                         name = classes[i];
 406                         if (name !== 'displayed') {
 407                                 newClasses.push(name);
 408                         }
 409                 }
 410
 411                 this.selectedSlide.className = newClasses.join(' ');
 412
 413                 // hightlight new displayed slide
 414                 this.selectedSlide = target;
 415                 className = this.selectedSlide.className;
 416                 classes = className.split(' ');
 417                 classes.push('displayed');
 418                 this.selectedSlide.className = classes.join(' ');
 419         }
 420 };
 421
 422 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 423         var target = getTargetedObject(evt);
 424         var button, link, url;
 425         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 426                 switch(target.getAttribute('name')) {
 427                         case 'previous' :
 428                                 disableDefault(evt);
 429                                 disablePropagation(evt);
 430                                 button = target;
 431                                 link = button.parentNode;
 432                                 link.blur();
 433                                 this.loadSibling(true);
 434                                 break;
 435                         case 'next' :
 436                                 disableDefault(evt);
 437                                 disablePropagation(evt);
 438                                 button = target;
 439                                 link = button.parentNode;
 440                                 link.blur();
 441                                 this.loadSibling(false);
 442                                 break;
 443                         case 'full_screen':
 444                                 disableDefault(evt);
 445                                 disablePropagation(evt);
 446                                 target.parentNode.blur();
 447                                 if (this.viewMode === 'full') {
 448                                         this.mosaique.unload();
 449                                         this.mosaique = null;
 450                                         this.viewMode = 'medium';
 451                                         return;
 452                                 }
 453                                 var main = document.getElementById('photo_viewer');
 454                                 url = target.parentNode.href;
 455                                 url = url.substring(0, url.length - '/zoom_view'.length);
 456                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 457                                 this.mosaique = new Mosaique(main, url, margins);
 458                                 this.viewMode = 'full';
 459                                 break;
 460
 461                         case 'toggle_selection':
 462                                 disableDefault(evt);
 463                                 disablePropagation(evt);
 464                                 button = target;
 465                                 link = button.parentNode;
 466                                 link.blur();
 467
 468                                 var req = new XMLHttpRequest();
 469                                 url = link.href;
 470                                 req.open("POST", url, true);
 471                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 472                                 req.send("ajax=1");
 473
 474                                 // toggle button
 475                                 var parts = url.split('/');
 476                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 477
 478                                 if (isAddToSelection.test(url)) {
 479                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 480                                         button.alt = link.title = 'Retirer de la sélection';
 481                                         link.href = canonicalImgUrl + '/remove_to_selection';
 482                                         this.selectedSlide.className = 'selected displayed';
 483                                         this.image.parentNode.className = 'selected';
 484                                         this.selectedSlideInSelection = true;
 485                                 }
 486                                 else {
 487                                         button.src = portal_url() + '/select_flag_btn.gif';
 488                                         button.alt = link.title = 'Ajouter à la sélection';
 489                                         link.href = canonicalImgUrl + '/add_to_selection';
 490                                         this.selectedSlide.className = 'displayed';
 491                                         this.image.parentNode.className = '';
 492                                         this.selectedSlideInSelection = false;
 493                                 }
 494                                 break;
 495
 496                         case 'show_buyable':
 497                                 disableDefault(evt);
 498                                 disablePropagation(evt);
 499                                 button = target;
 500                                 link = button.parentNode;
 501                                 link.blur();
 502                                 var slide = this.cartSlide;
 503                                 slide.innerHTML = '';
 504                                 slide.style.visibility = 'visible';
 505                                 var cw = new CartWidget(slide, link.href);
 506                                 cw.onCancel = function() {
 507                                         CartWidget.prototype.onCancel.apply(this);
 508                                         slide.style.visibility = 'hidden';
 509                                 };
 510                                 cw.onAfterConfirm = function() {
 511                                         slide.style.visibility = 'hidden';
 512                                 };
 513                                 break;
 514
 515
 516
 517
 518                         /*
 519                         case 'edit_metadata' :
 520                                 disableDefault(evt);
 521                                 disablePropagation(evt);
 522                                 target.blur();
 523                                 if (this.viewMode === 'full') {
 524                                         this.mosaique.unload();
 525                                         this.mosaique = null;
 526                                         this.viewMode = 'medium';
 527                                         return;
 528                                 }
 529                                 var fi = new FragmentImporter(absolute_url());
 530                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 531                                 break;
 532                         */
 533                 }
 534         }
 535 };
 536
 537
 538 if(browser.isDOM2Event) {
 539         if (browser.isAppleWebKit) {
 540                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 541                         disableDefault(evt);
 542                         var pos = this.getSliderPosition();
 543                         pos.x -= evt.wheelDelta / 40;
 544                         this.setSliderPosition(pos);
 545                 };
 546         }
 547         else {
 548                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 549                         disableDefault(evt);
 550                         var pos = this.getSliderPosition();
 551                         pos.x += evt.detail * 3;
 552                         this.setSliderPosition(pos);
 553                 };
 554         }
 555 }
 556 else if (browser.isIE6up) {
 557         FilmSlider.prototype.mouseWheelHandler = function() {
 558                 var evt = window.event;
 559                 evt.returnValue = false;
 560                 var pos = this.getSliderPosition();
 561                 pos.x -= evt.wheelDelta / 40;
 562                 this.setSliderPosition(pos);
 563         };
 564 }
 565
 566 FilmSlider.prototype.keyDownHandler = function(evt) {
 567         evt = getEventObject(evt);
 568         switch (evt.keyCode) {
 569                 case keyLeft :
 570                         this.loadSibling(true);
 571                         break;
 572                 case keyRight :
 573                         this.loadSibling(false);
 574                         break;
 575                 default:
 576                         return;
 577         }
 578 };
 579
 580
 581 FilmSlider.prototype.keyPressHandler = function(evt) {
 582         var target = getTargetedObject(evt);
 583         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 584         evt = getEventObject(evt);
 585         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 586         switch(charPress) {
 587                 case 'f':
 588                 case 'F':
 589                         raiseMouseEvent(this.buttons.full_screen, 'click');
 590                         break;
 591         }
 592 };
 593
 594 FilmSlider.prototype.populateViewer = function(req) {
 595         var elements = req.responseXML.documentElement.childNodes;
 596         var i;
 597         for(i=0 ; i < elements.length ; i++ ) {
 598                 element = elements[i];
 599                 switch (element.nodeName) {
 600                         case 'fragment' :
 601                                 var dest = document.getElementById(element.getAttribute('id'));
 602                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 603                                 break;
 604                         case 'imageattributes' :
 605                                 var link = this.buttons.back_to_portfolio.parentNode;
 606                                 link.href = element.getAttribute('backToContextUrl');
 607                                 link = this.buttons.show_buyable.parentNode;
 608                                 var buyable = element.getAttribute('buyable');
 609                                 if(buyable === 'True') { link.className = null; }
 610                                 else if(buyable === 'False') { link.className = 'hidden'; }
 611                                 this.image.alt = element.getAttribute('alt');
 612                                 this.updateBreadcrumbs(element.getAttribute('lastBcUrl'),
 613                                                                            element.getAttribute('img_id'));
 614                                 break;
 615                 }
 616         }
 617 };
 618
 619 FilmSlider.prototype.refreshImage = function() {
 620         this.image.style.visibility = 'hidden';
 621         this.image.src = this.pendingImage.src;
 622         this.image.width = this.pendingImage.width;
 623         this.image.height = this.pendingImage.height;
 624         this.image.style.visibility = 'visible';
 625         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 626         else { this.image.parentNode.className = ''; }
 627 };
 628
 629 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 630         if (this.hasBreadcrumbs) {
 631                 this.lastBCElement.href = element.getAttribute('lastBcUrl');
 632                 this.lastBCElement.innerHTML = element.getAttribute('img_id');
 633         }
 634 };
 635
 636 FilmSlider.prototype.startSlideShow = function() {
 637         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 638         return this.slideShowSlide.href;
 639 };
 640
 641 FilmSlider.prototype.slideShowNext = function() {
 642         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 643         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 644
 645         if (nextSlide) {
 646                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 647                 this.pendingSlideShowSlide = nextSlide;
 648                 return this.pendingSlideShowSlide.href;
 649         }
 650         else {
 651                 var row = this.slideShowSlide.parentNode.parentNode;
 652                 var first = row.firstChild;
 653                 if (first.nodeType===3) { first = first.nextSibling; }
 654                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 655                 return this.pendingSlideShowSlide.href;
 656         }
 657 };
 658
 659 FilmSlider.prototype.slideShowPrevious = function() {
 660         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 661         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 662
 663         if (previousSlide) {
 664                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 665                 this.pendingSlideShowSlide = previousSlide;
 666                 return this.pendingSlideShowSlide.href;
 667         }
 668         else {
 669                 var row = this.slideShowSlide.parentNode.parentNode;
 670                 var last = row.lastChild;
 671                 if (last.nodeType===3) { last = last.previousSibling; }
 672                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 673                 return this.pendingSlideShowSlide.href;
 674         }
 675 };
 676
 677 FilmSlider.prototype.slideShowImageLoaded = function() {
 678         this.slideShowSlide = this.pendingSlideShowSlide;
 679 };
 680
 681 FilmSlider.prototype.stopSlideShow = function() {
 682         raiseMouseEvent(this.slideShowSlide, 'click');
 683         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 684         this.centerSlide(index);
 685 };
 686
 687
 688 /* UTILS */
 689 function Point(x, y) {
 690         this.x = Math.round(x);
 691         this.y = Math.round(y);
 692 }
 693 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 694 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 695 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 696 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 697
 698 }());