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         if (browser.isMobile) {
  77                 this.rail.className = 'hidden';
  78         }
  79         else {
  80                 this.resizeSlider();
  81         }
  82         this.addEventListeners();
  83 };
  84
  85 if (!browser.isMobile) {
  86         FilmSlider.prototype.resizeSlider = function(evt) {
  87                 var filmBarWidth = this.filmBarWidth;
  88                 if (!filmBarWidth) { return; }
  89                 var filmWidth = this.slideSize * this.filmLength;
  90                 var sliderRatio = this.sliderRatio =  filmBarWidth / filmWidth;
  91                 var sliderWidth = filmBarWidth * sliderRatio;
  92                 this.rail.style.width = filmBarWidth + 'px';
  93                 this.rail.style.display = 'block';
  94                 this.rail.style.visibility = 'visible';
  95                 if (sliderRatio < 1) {
  96                         this.slider.style.width = Math.round(sliderWidth) + 'px';
  97                         this.slider.style.visibility = 'visible';
  98                 }
  99                 else {
 100                         this.slider.style.visibility = 'hidden';
 101                 }
 102
 103                 this.winSize = {'width'  : getWindowWidth(),
 104                                                 'height' : getWindowHeight()};
 105                 this.maxRightPosition = filmBarWidth - sliderWidth;
 106                 this.sliderSpeedRatio = - (filmBarWidth - sliderWidth) / (filmWidth - filmBarWidth);
 107                 if (!this.initialized) {
 108                         this.centerSlide(this.center);
 109                         this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 110                         this.initialized = true;
 111                 }
 112         };
 113 }
 114
 115 else {
 116         // pas de barre de scroll horizontal pour les tablettes
 117         FilmSlider.prototype.resizeSlider = function(evt) {};
 118 }
 119
 120 FilmSlider.prototype._checkSizeAfterLoad = function(evt) {
 121         this._barSizes = [];
 122         this.filmBarWidth = this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 123         this.resizeSlider();
 124         var self = this;
 125         this._checkSizeIntervalId = setInterval(function(evt){self._checkSize(evt);}, 25);
 126         setTimeout(function(evt){self._checkSizeStability();}, 250);
 127 };
 128
 129 FilmSlider.prototype._checkSize = function(evt) {
 130         this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 131         if (this._barSizes.length >= 2 &&
 132                 this._barSizes[this._barSizes.length-2] !== this._barSizes[this._barSizes.length-1]) {
 133                 this.filmBarWidth = this._barSizes[this._barSizes.length-1];
 134                 this.initialized = false;
 135                 this.resizeSlider();
 136         }
 137 };
 138
 139 FilmSlider.prototype._checkSizeStability = function(evt) {
 140         var self = this;
 141         var i;
 142         for (i=0 ; i<this._barSizes.length - 1 ; i++) {
 143                 if (this._barSizes[i] !== this._barSizes[i+1]) {
 144                         this._barSizes = [];
 145                         setTimeout(function(evt){self._checkSizeStability();}, 250);
 146                         return;
 147                 }
 148         }
 149         clearInterval(this._checkSizeIntervalId);
 150         delete this._barSizes;
 151         delete this._checkSizeIntervalId;
 152 };
 153
 154 FilmSlider.prototype.fitToScreen = function(evt) {
 155         this._fitToScreen();
 156         var thisSlider = this;
 157         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 158 };
 159
 160 FilmSlider.prototype._fitToScreen = function(evt) {
 161         var wh = getWindowHeight();
 162         if (!browser.isMobile) {
 163                 var rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 164         }
 165         else {
 166                 var rb = getObjectTop(this.filmBar) + getObjectHeight(this.filmBar); // film bottom
 167         }
 168         var delta = wh - rb;
 169         var sh = getObjectHeight(this.stretchable);
 170         var newSize = sh + delta;
 171         this.stretchable.style.height = newSize + 'px';
 172
 173         var ratio = this.image.height / this.image.width;
 174         var bestFitSize = this.getBestFitSize(ratio);
 175         var currentSize = parseInt(imgRequestedSize.exec(this.image.src)[1], 10);
 176         if (currentSize !== bestFitSize) {
 177                 var src = this.image.src.replace(imgRequestedSize, 'size=' + bestFitSize);
 178                 this.pendingImage.src = src;
 179         }
 180 };
 181
 182 FilmSlider.prototype.getBestFitSize = function(ratio) {
 183         var fw = getObjectWidth(this.stretchable) - 1;
 184         var fh = getObjectHeight(this.stretchable) - 1;
 185
 186         var i, irw, irh;
 187         if (ratio < 1) {
 188                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 189                         irw = DEFAULT_IMAGE_SIZES[i];
 190                         irh = irw * ratio;
 191                         if (irw <= fw && irh <= fh) { break; }
 192                 }
 193         }
 194         else {
 195                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 196                         irh = DEFAULT_IMAGE_SIZES[i];
 197                         irw = irh / ratio;
 198                         if (irw <= fw && irh <= fh) { break; }
 199                 }
 200         }
 201         return DEFAULT_IMAGE_SIZES[i];
 202 };
 203
 204 FilmSlider.prototype.centerSlide = function(slideIndex) {
 205         if (this.sliderRatio > 1) { return; }
 206         var filmBarWidth = getObjectWidth(this.filmBar);
 207         var x = slideIndex * this.slideSize;
 208         x = x - (filmBarWidth - this.slideSize) / 2.0;
 209         x = x * this.sliderSpeedRatio;
 210         var p = new Point( -x, 0 );
 211         this.setSliderPosition(p);
 212 };
 213
 214 FilmSlider.prototype.setSliderPosition = function(point) {
 215         if(point.x < 0) { point.x = 0; }
 216         if (point.x > this.maxRightPosition) { point.x = this.maxRightPosition; }
 217         this.slider.style.left = point.x + 'px';
 218         this.setFilmPosition(point);
 219 };
 220
 221 FilmSlider.prototype.setFilmPosition = function(point) {
 222         this.film.style.left = point.x / this.sliderSpeedRatio + 'px';
 223 };
 224
 225 FilmSlider.prototype.getSliderPosition = function() {
 226         var x = parseInt(this.slider.style.left, 10);
 227         var y = parseInt(this.slider.style.top, 10);
 228         var p = new Point(x, y);
 229         return p;
 230 };
 231
 232 FilmSlider.prototype.getFilmPosition = function() {
 233         var x = parseInt(this.film.style.left, 10);
 234         var y = parseInt(this.film.style.top, 10);
 235         var p = new Point(x, y);
 236         return p;
 237 };
 238
 239 FilmSlider.prototype.loadSibling = function(previous) {
 240         var slide = null;
 241         if (previous) {
 242                 slide = this.selectedSlide.parentNode.previousSibling;
 243                 if (slide && slide.nodeType===3) { slide = slide.previousSibling; }
 244         }
 245         else {
 246                 slide = this.selectedSlide.parentNode.nextSibling;
 247                 if (slide && slide.nodeType===3) { slide = slide.nextSibling; }
 248         }
 249
 250         if (!slide) { return; }
 251         else {
 252                 var target = slide.getElementsByTagName('a')[0];
 253                 raiseMouseEvent(target, 'click');
 254                 var index = parseInt(target.getAttribute('portfolio:position'), 10);
 255                 this.centerSlide(index);
 256         }
 257 };
 258
 259 FilmSlider.prototype.addEventListeners = function() {
 260         var thisSlider = this;
 261         addListener(window, 'resize', function(evt){thisSlider.resizeSlider(evt);});
 262         addListener(this.filmBar, 'click', function(evt){thisSlider.thumbnailClickHandler(evt);});
 263         addListener(this.toolbar, 'click', function(evt){thisSlider.toolbarClickHandler(evt);});
 264         addListener(window, 'load', function(evt){thisSlider.fitToScreen(evt);});
 265         addListener(window, 'load', function(evt){thisSlider._checkSizeAfterLoad(evt);});
 266
 267         // dd listeners
 268         addListener(this.slider, 'mousedown', this.ddHandlers.down);
 269         if(browser.isDOM2Event){
 270                 if (browser.isAppleWebKit) {
 271                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 272                 }
 273                 else {
 274                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 275                 }
 276         }
 277         else if (browser.isIE6up) {
 278                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 279         }
 280         if (browser.isMobile) {
 281                 this.filmBar.addEventListener('touchstart', function(evt){thisSlider.touchStartHandler(evt);}, false);
 282                 this.filmBar.addEventListener('touchmove', function(evt){thisSlider.touchMoveHandler(evt);}, false);
 283                 this.filmBar.addEventListener('touchend', function(evt){thisSlider.touchEndHandler(evt);}, false);
 284         }
 285
 286         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 287         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 288 };
 289
 290
 291 FilmSlider.prototype.mouseDownHandler = function(evt) {
 292         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 293         this.initialPosition = this.getSliderPosition();
 294         this.dragInProgress = true;
 295         addListener(document, 'mousemove', this.ddHandlers.move);
 296         addListener(document, 'mouseup', this.ddHandlers.up);
 297         addListener(document.body, 'mouseout', this.ddHandlers.out);
 298 };
 299
 300
 301 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 302         if(!this.dragInProgress) { return; }
 303
 304         clearSelection();
 305         evt = getEventObject(evt);
 306         var currentPoint = new Point(evt.clientX, evt.clientY);
 307         var displacement = currentPoint.diff(this.initialClickPoint);
 308         this.setSliderPosition(this.initialPosition.add(displacement));
 309 };
 310
 311 FilmSlider.prototype.mouseUpHandler = function(evt) {
 312         this.dragInProgress = false;
 313         evt = getEventObject(evt);
 314         this.mouseMoveHandler(evt);
 315 };
 316
 317
 318 FilmSlider.prototype.mouseOutHandler = function(evt) {
 319         evt = getEventObject(evt);
 320         var x = evt.clientX;
 321         var y = evt.clientY;
 322         if (x < 0 ||
 323                 x > this.winSize.width ||
 324                 y < 0 ||
 325                 y > this.winSize.height
 326                 ) {
 327                 this.mouseUpHandler(evt);
 328         }
 329 };
 330
 331 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 332         var target = getTargetedObject(evt);
 333         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 334         if (target.tagName !== 'A') { return; }
 335         else {
 336                 if (this.viewMode === 'full') {
 337                         this.mosaique.unload();
 338                         this.mosaique = null;
 339                         this.viewMode = 'medium';
 340                 }
 341                 disableDefault(evt);
 342                 disablePropagation(evt);
 343                 target.blur();
 344                 history.pushState(target.href, '', target.href);
 345
 346                 var imgBaseUrl = target.href;
 347                 var canonicalImgUrl;
 348                 if (this.ctxUrlTranslation[0]) {
 349                         canonicalImgUrl = imgBaseUrl.replace(this.ctxUrlTranslation[0],
 350                                                                                                  this.ctxUrlTranslation[1]);
 351                 }
 352                 else { canonicalImgUrl = imgBaseUrl; }
 353
 354                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 355                 var thisFS = this;
 356
 357                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 358                 var thumbnail = target.getElementsByTagName('IMG')[0];
 359                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 360                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 361
 362                 // update buttons
 363                 var fullScreenLink = this.buttons.full_screen.parentNode;
 364                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 365
 366                 var toggleSelectionBtn = this.buttons.toggle_selection;
 367                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 368                 this.selectedSlideInSelection = (target.className==='selected');
 369                 if (this.selectedSlideInSelection) {
 370                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 371                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 372                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 373                 }
 374                 else {
 375                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 376                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 377                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 378                 }
 379
 380                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 381                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 382                 this.cartSlide.innerHTML = '';
 383                 this.cartSlide.style.visibility='hidden';
 384
 385
 386                 var metadataButton = this.buttons.edit_metadata;
 387                 if (metadataButton) {
 388                         var metadataEditLink = metadataButton.parentNode;
 389                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 390                 }
 391
 392
 393                 var req = new XMLHttpRequest();
 394                 req.onreadystatechange = function() {
 395                         switch (req.readyState) {
 396                                 case 1 :
 397                                         showProgressImage();
 398                                         break;
 399                                 case 2 :
 400                                         try {
 401                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 402                                                         req.onreadystatechange = null;
 403                                                         req.abort();
 404                                                         hideProgressImage();
 405                                                         window.location.href = thisFS._fallBackUrl;
 406                                                 }
 407                                         }
 408                                         catch(e){}
 409                                         break;
 410                                 case 4 :
 411                                         hideProgressImage();
 412                                         if (req.status === 200) { thisFS.populateViewer(req); }
 413                                         break;
 414                         }
 415                 };
 416
 417                 req.open("GET", ajaxUrl, true);
 418                 req.send(null);
 419
 420                 // update old displayed slide className
 421                 var className = this.selectedSlide.className;
 422                 var classes = className.split(' ');
 423                 var newClasses = [];
 424                 var name, i;
 425
 426                 for (i=0 ; i<classes.length ;  i++) {
 427                         name = classes[i];
 428                         if (name !== 'displayed') {
 429                                 newClasses.push(name);
 430                         }
 431                 }
 432
 433                 this.selectedSlide.className = newClasses.join(' ');
 434
 435                 // hightlight new displayed slide
 436                 this.selectedSlide = target;
 437                 className = this.selectedSlide.className;
 438                 classes = className.split(' ');
 439                 classes.push('displayed');
 440                 this.selectedSlide.className = classes.join(' ');
 441         }
 442 };
 443
 444 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 445         var target = getTargetedObject(evt);
 446         var button, link, url;
 447         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 448                 switch(target.getAttribute('name')) {
 449                         case 'previous' :
 450                                 disableDefault(evt);
 451                                 disablePropagation(evt);
 452                                 button = target;
 453                                 link = button.parentNode;
 454                                 link.blur();
 455                                 this.loadSibling(true);
 456                                 break;
 457                         case 'next' :
 458                                 disableDefault(evt);
 459                                 disablePropagation(evt);
 460                                 button = target;
 461                                 link = button.parentNode;
 462                                 link.blur();
 463                                 this.loadSibling(false);
 464                                 break;
 465                         case 'full_screen':
 466                                 disableDefault(evt);
 467                                 disablePropagation(evt);
 468                                 target.parentNode.blur();
 469                                 if (this.viewMode === 'full') {
 470                                         this.mosaique.unload();
 471                                         this.mosaique = null;
 472                                         this.viewMode = 'medium';
 473                                         return;
 474                                 }
 475                                 var main = document.getElementById('photo_viewer');
 476                                 url = target.parentNode.href;
 477                                 url = url.substring(0, url.length - '/zoom_view'.length);
 478                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 479                                 this.mosaique = new Mosaique(main, url, margins);
 480                                 this.viewMode = 'full';
 481                                 break;
 482
 483                         case 'toggle_selection':
 484                                 disableDefault(evt);
 485                                 disablePropagation(evt);
 486                                 button = target;
 487                                 link = button.parentNode;
 488                                 link.blur();
 489
 490                                 var req = new XMLHttpRequest();
 491                                 url = link.href;
 492                                 req.open("POST", url, true);
 493                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 494                                 req.send("ajax=1");
 495
 496                                 // toggle button
 497                                 var parts = url.split('/');
 498                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 499
 500                                 if (isAddToSelection.test(url)) {
 501                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 502                                         button.alt = link.title = 'Retirer de la sélection';
 503                                         link.href = canonicalImgUrl + '/remove_to_selection';
 504                                         this.selectedSlide.className = 'selected displayed';
 505                                         this.image.parentNode.className = 'selected';
 506                                         this.selectedSlideInSelection = true;
 507                                 }
 508                                 else {
 509                                         button.src = portal_url() + '/select_flag_btn.gif';
 510                                         button.alt = link.title = 'Ajouter à la sélection';
 511                                         link.href = canonicalImgUrl + '/add_to_selection';
 512                                         this.selectedSlide.className = 'displayed';
 513                                         this.image.parentNode.className = '';
 514                                         this.selectedSlideInSelection = false;
 515                                 }
 516                                 break;
 517
 518                         case 'show_buyable':
 519                                 disableDefault(evt);
 520                                 disablePropagation(evt);
 521                                 button = target;
 522                                 link = button.parentNode;
 523                                 link.blur();
 524                                 var slide = this.cartSlide;
 525                                 slide.innerHTML = '';
 526                                 slide.style.visibility = 'visible';
 527                                 var cw = new CartWidget(slide, link.href);
 528                                 cw.onCancel = function() {
 529                                         CartWidget.prototype.onCancel.apply(this);
 530                                         slide.style.visibility = 'hidden';
 531                                 };
 532                                 cw.onAfterConfirm = function() {
 533                                         slide.style.visibility = 'hidden';
 534                                 };
 535                                 break;
 536
 537
 538
 539
 540                         /*
 541                         case 'edit_metadata' :
 542                                 disableDefault(evt);
 543                                 disablePropagation(evt);
 544                                 target.blur();
 545                                 if (this.viewMode === 'full') {
 546                                         this.mosaique.unload();
 547                                         this.mosaique = null;
 548                                         this.viewMode = 'medium';
 549                                         return;
 550                                 }
 551                                 var fi = new FragmentImporter(absolute_url());
 552                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 553                                 break;
 554                         */
 555                 }
 556         }
 557 };
 558
 559
 560 if(browser.isDOM2Event) {
 561         if (browser.isAppleWebKit) {
 562                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 563                         disableDefault(evt);
 564                         var pos = this.getSliderPosition();
 565                         pos.x -= evt.wheelDelta / 40;
 566                         this.setSliderPosition(pos);
 567                 };
 568         }
 569         else {
 570                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 571                         disableDefault(evt);
 572                         var pos = this.getSliderPosition();
 573                         pos.x += evt.detail * 3;
 574                         this.setSliderPosition(pos);
 575                 };
 576         }
 577 }
 578 else if (browser.isIE6up) {
 579         FilmSlider.prototype.mouseWheelHandler = function() {
 580                 var evt = window.event;
 581                 evt.returnValue = false;
 582                 var pos = this.getSliderPosition();
 583                 pos.x -= evt.wheelDelta / 40;
 584                 this.setSliderPosition(pos);
 585         };
 586 }
 587
 588 FilmSlider.prototype.touchStartHandler = function(evt) {
 589         this.filmStartX = parseInt(this.film.style.left, 10);
 590         this.touchStartX = evt.pageX;
 591 };
 592
 593 FilmSlider.prototype.touchMoveHandler = function(evt) {
 594         var delta = this.touchStartX - evt.pageX;
 595         var posX = Math.min(0, this.filmStartX - delta);
 596         this.film.style.left = String(posX) + 'px';
 597 };
 598
 599 FilmSlider.prototype.touchEndHandler = function(evt) {
 600         this.touchStartX = undefined;
 601 };
 602
 603
 604 FilmSlider.prototype.keyDownHandler = function(evt) {
 605         evt = getEventObject(evt);
 606         switch (evt.keyCode) {
 607                 case keyLeft :
 608                         this.loadSibling(true);
 609                         break;
 610                 case keyRight :
 611                         this.loadSibling(false);
 612                         break;
 613                 default:
 614                         return;
 615         }
 616 };
 617
 618
 619 FilmSlider.prototype.keyPressHandler = function(evt) {
 620         var target = getTargetedObject(evt);
 621         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 622         evt = getEventObject(evt);
 623         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 624         switch(charPress) {
 625                 case 'f':
 626                 case 'F':
 627                         raiseMouseEvent(this.buttons.full_screen, 'click');
 628                         break;
 629         }
 630 };
 631
 632 FilmSlider.prototype.populateViewer = function(req) {
 633         var elements = req.responseXML.documentElement.childNodes;
 634         var i;
 635         for(i=0 ; i < elements.length ; i++ ) {
 636                 element = elements[i];
 637                 switch (element.nodeName) {
 638                         case 'fragment' :
 639                                 var dest = document.getElementById(element.getAttribute('id'));
 640                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 641                                 break;
 642                         case 'imageattributes' :
 643                                 var link = this.buttons.back_to_portfolio.parentNode;
 644                                 link.href = element.getAttribute('back_to_context_url');
 645                                 link = this.buttons.show_buyable.parentNode;
 646                                 var buyable = element.getAttribute('buyable');
 647                                 if(buyable === 'True') { link.className = null; }
 648                                 else if(buyable === 'False') { link.className = 'hidden'; }
 649                                 this.image.alt = element.getAttribute('alt');
 650                                 this.updateBreadcrumbs(element.getAttribute('last_bc_url'),
 651                                                                            element.getAttribute('img_id'));
 652                                 break;
 653                 }
 654         }
 655 };
 656
 657 FilmSlider.prototype.refreshImage = function() {
 658         this.image.style.visibility = 'hidden';
 659         this.image.src = this.pendingImage.src;
 660         this.image.width = this.pendingImage.width;
 661         this.image.height = this.pendingImage.height;
 662         this.image.style.visibility = 'visible';
 663         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 664         else { this.image.parentNode.className = ''; }
 665 };
 666
 667 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 668         if (this.hasBreadcrumbs) {
 669                 this.lastBCElement.href = element.getAttribute('lastBcUrl');
 670                 this.lastBCElement.innerHTML = element.getAttribute('img_id');
 671         }
 672 };
 673
 674 FilmSlider.prototype.startSlideShow = function() {
 675         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 676         return this.slideShowSlide.href;
 677 };
 678
 679 FilmSlider.prototype.slideShowNext = function() {
 680         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 681         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 682
 683         if (nextSlide) {
 684                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 685                 this.pendingSlideShowSlide = nextSlide;
 686                 return this.pendingSlideShowSlide.href;
 687         }
 688         else {
 689                 var row = this.slideShowSlide.parentNode.parentNode;
 690                 var first = row.firstChild;
 691                 if (first.nodeType===3) { first = first.nextSibling; }
 692                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 693                 return this.pendingSlideShowSlide.href;
 694         }
 695 };
 696
 697 FilmSlider.prototype.slideShowPrevious = function() {
 698         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 699         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 700
 701         if (previousSlide) {
 702                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 703                 this.pendingSlideShowSlide = previousSlide;
 704                 return this.pendingSlideShowSlide.href;
 705         }
 706         else {
 707                 var row = this.slideShowSlide.parentNode.parentNode;
 708                 var last = row.lastChild;
 709                 if (last.nodeType===3) { last = last.previousSibling; }
 710                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 711                 return this.pendingSlideShowSlide.href;
 712         }
 713 };
 714
 715 FilmSlider.prototype.slideShowImageLoaded = function() {
 716         this.slideShowSlide = this.pendingSlideShowSlide;
 717 };
 718
 719 FilmSlider.prototype.stopSlideShow = function() {
 720         raiseMouseEvent(this.slideShowSlide, 'click');
 721         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 722         this.centerSlide(index);
 723 };
 724
 725
 726 /* UTILS */
 727 function Point(x, y) {
 728         this.x = Math.round(x);
 729         this.y = Math.round(y);
 730 }
 731 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 732 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 733 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 734 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 735
 736 }());