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                 this.filmMaxX = - (getObjectWidth(this.film) - this.filmBarWidth);
 119                 if (!this.initialized) {
 120                         this.centerSlide(this.center);
 121                         this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 122                         this.initialized = true;
 123                 }
 124         };
 125 }
 126
 127 FilmSlider.prototype._checkSizeAfterLoad = function(evt) {
 128         this._barSizes = [];
 129         this.filmBarWidth = this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 130         this.resizeSlider();
 131         var self = this;
 132         this._checkSizeIntervalId = setInterval(function(evt){self._checkSize(evt);}, 25);
 133         setTimeout(function(evt){self._checkSizeStability();}, 250);
 134 };
 135
 136 FilmSlider.prototype._checkSize = function(evt) {
 137         this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 138         if (this._barSizes.length >= 2 &&
 139                 this._barSizes[this._barSizes.length-2] !== this._barSizes[this._barSizes.length-1]) {
 140                 this.filmBarWidth = this._barSizes[this._barSizes.length-1];
 141                 this.initialized = false;
 142                 this.resizeSlider();
 143         }
 144 };
 145
 146 FilmSlider.prototype._checkSizeStability = function(evt) {
 147         var self = this;
 148         var i;
 149         for (i=0 ; i<this._barSizes.length - 1 ; i++) {
 150                 if (this._barSizes[i] !== this._barSizes[i+1]) {
 151                         this._barSizes = [];
 152                         setTimeout(function(evt){self._checkSizeStability();}, 250);
 153                         return;
 154                 }
 155         }
 156         clearInterval(this._checkSizeIntervalId);
 157         delete this._barSizes;
 158         delete this._checkSizeIntervalId;
 159 };
 160
 161 FilmSlider.prototype.fitToScreen = function(evt) {
 162         this._fitToScreen();
 163         var thisSlider = this;
 164         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 165 };
 166
 167 FilmSlider.prototype._fitToScreen = function(evt) {
 168         var wh = getWindowHeight();
 169         if (!browser.isMobile) {
 170                 var rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 171         }
 172         else {
 173                 var rb = getObjectTop(this.filmBar) + getObjectHeight(this.filmBar); // film bottom
 174         }
 175         var delta = wh - rb;
 176         var sh = getObjectHeight(this.stretchable);
 177         var newSize = sh + delta;
 178         this.stretchable.style.height = newSize + 'px';
 179
 180         var ratio = this.image.height / this.image.width;
 181         var bestFitSize = this.getBestFitSize(ratio);
 182         var currentSize = parseInt(imgRequestedSize.exec(this.image.src)[1], 10);
 183         if (currentSize !== bestFitSize) {
 184                 var src = this.image.src.replace(imgRequestedSize, 'size=' + bestFitSize);
 185                 this.pendingImage.src = src;
 186         }
 187 };
 188
 189 FilmSlider.prototype.getBestFitSize = function(ratio) {
 190         var fw = getObjectWidth(this.stretchable) - 1;
 191         var fh = getObjectHeight(this.stretchable) - 1;
 192
 193         var i, irw, irh;
 194         if (ratio < 1) {
 195                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 196                         irw = DEFAULT_IMAGE_SIZES[i];
 197                         irh = irw * ratio;
 198                         if (irw <= fw && irh <= fh) { break; }
 199                 }
 200         }
 201         else {
 202                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 203                         irh = DEFAULT_IMAGE_SIZES[i];
 204                         irw = irh / ratio;
 205                         if (irw <= fw && irh <= fh) { break; }
 206                 }
 207         }
 208         return DEFAULT_IMAGE_SIZES[i];
 209 };
 210
 211 if (!browser.isMobile) {
 212         FilmSlider.prototype.centerSlide = function(slideIndex) {
 213                 if (this.sliderRatio > 1) { return; }
 214                 var filmBarWidth = getObjectWidth(this.filmBar);
 215                 var x = slideIndex * this.slideSize;
 216                 x = x - (filmBarWidth - this.slideSize) / 2.0;
 217                 x = x * this.sliderSpeedRatio;
 218                 var p = new Point( -x, 0 );
 219                 this.setSliderPosition(p);
 220         };
 221 }
 222 else {
 223         FilmSlider.prototype.centerSlide = function(slideIndex) {
 224                 var filmBarWidth = getObjectWidth(this.filmBar);
 225                 var x = slideIndex * this.slideSize;
 226                 x = x - (filmBarWidth - this.slideSize) / 2.0;
 227                 this.setFilmPosition(-x);
 228         };
 229 }
 230
 231 FilmSlider.prototype.setSliderPosition = function(point) {
 232         if(point.x < 0) { point.x = 0; }
 233         if (point.x > this.maxRightPosition) { point.x = this.maxRightPosition; }
 234         this.slider.style.left = point.x + 'px';
 235         this.setFilmPosition(point);
 236 };
 237
 238 if (!browser.isMobile) {
 239         FilmSlider.prototype.setFilmPosition = function(point) {
 240                 this.film.style.left = point.x / this.sliderSpeedRatio + 'px';
 241         };
 242 }
 243 else {
 244         FilmSlider.prototype.setFilmPosition = function(x) {
 245                 x = Math.min(0, x);
 246                 x = Math.max(this.filmMaxX, x);
 247                 this.film.style.left = String(x) + 'px';
 248         };
 249 }
 250
 251 FilmSlider.prototype.getSliderPosition = function() {
 252         var x = parseInt(this.slider.style.left, 10);
 253         var y = parseInt(this.slider.style.top, 10);
 254         var p = new Point(x, y);
 255         return p;
 256 };
 257
 258 FilmSlider.prototype.getFilmPosition = function() {
 259         var x = parseInt(this.film.style.left, 10);
 260         var y = parseInt(this.film.style.top, 10);
 261         var p = new Point(x, y);
 262         return p;
 263 };
 264
 265 FilmSlider.prototype.loadSibling = function(previous) {
 266         var slide = null;
 267         if (previous) {
 268                 slide = this.selectedSlide.parentNode.previousSibling;
 269                 if (slide && slide.nodeType===3) { slide = slide.previousSibling; }
 270         }
 271         else {
 272                 slide = this.selectedSlide.parentNode.nextSibling;
 273                 if (slide && slide.nodeType===3) { slide = slide.nextSibling; }
 274         }
 275
 276         if (!slide) { return; }
 277         else {
 278                 var target = slide.getElementsByTagName('a')[0];
 279                 raiseMouseEvent(target, 'click');
 280                 var index = parseInt(target.getAttribute('portfolio:position'), 10);
 281                 this.centerSlide(index);
 282         }
 283 };
 284
 285 FilmSlider.prototype.addEventListeners = function() {
 286         var thisSlider = this;
 287         addListener(window, 'resize', function(evt){thisSlider.resizeSlider(evt);});
 288         addListener(this.filmBar, 'click', function(evt){thisSlider.thumbnailClickHandler(evt);});
 289         addListener(this.toolbar, 'click', function(evt){thisSlider.toolbarClickHandler(evt);});
 290         addListener(window, 'load', function(evt){thisSlider.fitToScreen(evt);});
 291         addListener(window, 'load', function(evt){thisSlider._checkSizeAfterLoad(evt);});
 292         addListener(window, 'load', function(evt){thisSlider.startThumbnailsLoadQueue(evt);});
 293
 294         // dd listeners
 295         addListener(this.slider, 'mousedown', this.ddHandlers.down);
 296         if(browser.isDOM2Event){
 297                 if (browser.isAppleWebKit) {
 298                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 299                 }
 300                 else {
 301                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 302                 }
 303         }
 304         else if (browser.isIE6up) {
 305                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 306         }
 307         if (browser.isMobile) {
 308                 this.filmBar.addEventListener('touchstart', function(evt){thisSlider.touchStartHandler(evt);}, false);
 309                 this.filmBar.addEventListener('touchmove', function(evt){thisSlider.touchMoveHandler(evt);}, false);
 310                 this.filmBar.addEventListener('touchend', function(evt){thisSlider.touchEndHandler(evt);}, false);
 311         }
 312
 313         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 314         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 315 };
 316
 317
 318 FilmSlider.prototype.mouseDownHandler = function(evt) {
 319         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 320         this.initialPosition = this.getSliderPosition();
 321         this.dragInProgress = true;
 322         addListener(document, 'mousemove', this.ddHandlers.move);
 323         addListener(document, 'mouseup', this.ddHandlers.up);
 324         addListener(document.body, 'mouseout', this.ddHandlers.out);
 325 };
 326
 327
 328 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 329         if(!this.dragInProgress) { return; }
 330
 331         clearSelection();
 332         evt = getEventObject(evt);
 333         var currentPoint = new Point(evt.clientX, evt.clientY);
 334         var displacement = currentPoint.diff(this.initialClickPoint);
 335         this.setSliderPosition(this.initialPosition.add(displacement));
 336 };
 337
 338 FilmSlider.prototype.mouseUpHandler = function(evt) {
 339         this.dragInProgress = false;
 340         evt = getEventObject(evt);
 341         this.mouseMoveHandler(evt);
 342 };
 343
 344
 345 FilmSlider.prototype.mouseOutHandler = function(evt) {
 346         evt = getEventObject(evt);
 347         var x = evt.clientX;
 348         var y = evt.clientY;
 349         if (x < 0 ||
 350                 x > this.winSize.width ||
 351                 y < 0 ||
 352                 y > this.winSize.height
 353                 ) {
 354                 this.mouseUpHandler(evt);
 355         }
 356 };
 357
 358 FilmSlider.prototype.translateImgUrl = function(url) {
 359         var canonicalImgUrl;
 360         if (this.ctxUrlTranslation[0]) {
 361                 canonicalImgUrl = url.replace(this.ctxUrlTranslation[0],
 362                                                                           this.ctxUrlTranslation[1]);
 363         }
 364         else {
 365                 canonicalImgUrl = url;
 366         }
 367         return canonicalImgUrl;
 368 };
 369
 370 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 371         var target = getTargetedObject(evt);
 372         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 373         if (target.tagName !== 'A') { return; }
 374         else {
 375                 if (this.viewMode === 'full') {
 376                         this.mosaique.unload();
 377                         this.mosaique = null;
 378                         this.viewMode = 'medium';
 379                 }
 380                 disableDefault(evt);
 381                 disablePropagation(evt);
 382                 target.blur();
 383                 history.pushState(target.href, '', target.href);
 384
 385                 var imgBaseUrl = target.href;
 386                 var canonicalImgUrl = this.translateImgUrl(imgBaseUrl);
 387
 388                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 389                 var thisFS = this;
 390
 391                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 392                 var thumbnail = target.getElementsByTagName('IMG')[0];
 393                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 394                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 395
 396                 // update buttons
 397                 var fullScreenLink = this.buttons.full_screen.parentNode;
 398                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 399
 400                 var toggleSelectionBtn = this.buttons.toggle_selection;
 401                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 402                 this.selectedSlideInSelection = (target.className==='selected');
 403                 if (this.selectedSlideInSelection) {
 404                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 405                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 406                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 407                 }
 408                 else {
 409                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 410                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 411                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 412                 }
 413
 414                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 415                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 416                 this.cartSlide.innerHTML = '';
 417                 this.cartSlide.style.visibility='hidden';
 418
 419
 420                 var metadataButton = this.buttons.edit_metadata;
 421                 if (metadataButton) {
 422                         var metadataEditLink = metadataButton.parentNode;
 423                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 424                 }
 425
 426
 427                 var req = new XMLHttpRequest();
 428                 req.onreadystatechange = function() {
 429                         switch (req.readyState) {
 430                                 case 1 :
 431                                         showProgressImage();
 432                                         break;
 433                                 case 2 :
 434                                         try {
 435                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 436                                                         req.onreadystatechange = null;
 437                                                         req.abort();
 438                                                         hideProgressImage();
 439                                                         window.location.href = thisFS._fallBackUrl;
 440                                                 }
 441                                         }
 442                                         catch(e){}
 443                                         break;
 444                                 case 4 :
 445                                         hideProgressImage();
 446                                         if (req.status === 200) { thisFS.populateViewer(req); }
 447                                         break;
 448                         }
 449                 };
 450
 451                 req.open("GET", ajaxUrl, true);
 452                 req.send(null);
 453
 454                 // update old displayed slide className
 455                 var className = this.selectedSlide.className;
 456                 var classes = className.split(' ');
 457                 var newClasses = [];
 458                 var name, i;
 459
 460                 for (i=0 ; i<classes.length ;  i++) {
 461                         name = classes[i];
 462                         if (name !== 'displayed') {
 463                                 newClasses.push(name);
 464                         }
 465                 }
 466
 467                 this.selectedSlide.className = newClasses.join(' ');
 468
 469                 // hightlight new displayed slide
 470                 this.selectedSlide = target;
 471                 className = this.selectedSlide.className;
 472                 classes = className.split(' ');
 473                 classes.push('displayed');
 474                 this.selectedSlide.className = classes.join(' ');
 475         }
 476 };
 477
 478 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 479         var target = getTargetedObject(evt);
 480         var button, link, url;
 481         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 482                 switch(target.getAttribute('name')) {
 483                         case 'previous' :
 484                                 disableDefault(evt);
 485                                 disablePropagation(evt);
 486                                 button = target;
 487                                 link = button.parentNode;
 488                                 link.blur();
 489                                 this.loadSibling(true);
 490                                 break;
 491                         case 'next' :
 492                                 disableDefault(evt);
 493                                 disablePropagation(evt);
 494                                 button = target;
 495                                 link = button.parentNode;
 496                                 link.blur();
 497                                 this.loadSibling(false);
 498                                 break;
 499                         case 'full_screen':
 500                                 disableDefault(evt);
 501                                 disablePropagation(evt);
 502                                 target.parentNode.blur();
 503                                 if (this.viewMode === 'full') {
 504                                         this.mosaique.unload();
 505                                         this.mosaique = null;
 506                                         this.viewMode = 'medium';
 507                                         return;
 508                                 }
 509                                 var main = document.getElementById('photo_viewer');
 510                                 url = target.parentNode.href;
 511                                 url = url.substring(0, url.length - '/zoom_view'.length);
 512                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 513                                 this.mosaique = new Mosaique(main, url, margins);
 514                                 this.viewMode = 'full';
 515                                 break;
 516
 517                         case 'toggle_selection':
 518                                 disableDefault(evt);
 519                                 disablePropagation(evt);
 520                                 button = target;
 521                                 link = button.parentNode;
 522                                 link.blur();
 523
 524                                 var req = new XMLHttpRequest();
 525                                 url = link.href;
 526                                 req.open("POST", url, true);
 527                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 528                                 req.send("ajax=1");
 529
 530                                 // toggle button
 531                                 var parts = url.split('/');
 532                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 533
 534                                 if (isAddToSelection.test(url)) {
 535                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 536                                         button.alt = link.title = 'Retirer de la sélection';
 537                                         link.href = canonicalImgUrl + '/remove_to_selection';
 538                                         this.selectedSlide.className = 'selected displayed';
 539                                         this.image.parentNode.className = 'selected';
 540                                         this.selectedSlideInSelection = true;
 541                                 }
 542                                 else {
 543                                         button.src = portal_url() + '/select_flag_btn.gif';
 544                                         button.alt = link.title = 'Ajouter à la sélection';
 545                                         link.href = canonicalImgUrl + '/add_to_selection';
 546                                         this.selectedSlide.className = 'displayed';
 547                                         this.image.parentNode.className = '';
 548                                         this.selectedSlideInSelection = false;
 549                                 }
 550                                 break;
 551
 552                         case 'show_buyable':
 553                                 disableDefault(evt);
 554                                 disablePropagation(evt);
 555                                 button = target;
 556                                 link = button.parentNode;
 557                                 link.blur();
 558                                 var slide = this.cartSlide;
 559                                 slide.innerHTML = '';
 560                                 slide.style.visibility = 'visible';
 561                                 var cw = new CartWidget(slide, link.href);
 562                                 cw.onCancel = function() {
 563                                         CartWidget.prototype.onCancel.apply(this);
 564                                         slide.style.visibility = 'hidden';
 565                                 };
 566                                 cw.onAfterConfirm = function() {
 567                                         slide.style.visibility = 'hidden';
 568                                 };
 569                                 break;
 570
 571
 572
 573
 574                         /*
 575                         case 'edit_metadata' :
 576                                 disableDefault(evt);
 577                                 disablePropagation(evt);
 578                                 target.blur();
 579                                 if (this.viewMode === 'full') {
 580                                         this.mosaique.unload();
 581                                         this.mosaique = null;
 582                                         this.viewMode = 'medium';
 583                                         return;
 584                                 }
 585                                 var fi = new FragmentImporter(absolute_url());
 586                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 587                                 break;
 588                         */
 589                 }
 590         }
 591 };
 592
 593
 594 if(browser.isDOM2Event) {
 595         if (browser.isAppleWebKit) {
 596                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 597                         disableDefault(evt);
 598                         var pos = this.getSliderPosition();
 599                         pos.x -= evt.wheelDelta / 40;
 600                         this.setSliderPosition(pos);
 601                 };
 602         }
 603         else {
 604                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 605                         disableDefault(evt);
 606                         var pos = this.getSliderPosition();
 607                         pos.x += evt.detail * 3;
 608                         this.setSliderPosition(pos);
 609                 };
 610         }
 611 }
 612 else if (browser.isIE6up) {
 613         FilmSlider.prototype.mouseWheelHandler = function() {
 614                 var evt = window.event;
 615                 evt.returnValue = false;
 616                 var pos = this.getSliderPosition();
 617                 pos.x -= evt.wheelDelta / 40;
 618                 this.setSliderPosition(pos);
 619         };
 620 }
 621
 622 FilmSlider.prototype.touchStartHandler = function(evt) {
 623         this.filmStartX = parseInt(this.film.style.left, 10);
 624         this.touchStartX = evt.changedTouches[0].screenX;
 625         this.touchStartTime = (new Date()).getTime();
 626 };
 627
 628 FilmSlider.prototype.touchMoveHandler = function(evt) {
 629         disableDefault(evt);
 630         var delta = this.touchStartX - evt.changedTouches[0].screenX;
 631         var posX = this.filmStartX - delta;
 632         this.setFilmPosition(posX);
 633     this.lastMoveTime = (new Date()).getTime();
 634 };
 635
 636 FilmSlider.prototype.touchEndHandler = function(evt) {
 637     var x = evt.changedTouches[0].screenX;
 638         var delta = x - this.touchStartX;
 639         if (delta) {
 640                 disableDefault(evt);
 641         var now = (new Date()).getTime();
 642         if (now - this.lastMoveTime < 100) {
 643             // au delà de 100 ms de maintient, on annule l'inertie
 644                 var speed = delta / (now - this.touchStartTime)
 645                 var x0 = parseInt(this.film.style.left, 10);
 646                 var t0 = (new Date()).getTime();
 647                 var d = 500; // milisecondes
 648             var delta = 0;
 649             var dt = 25
 650                 var self = this;
 651
 652                 function animate() {
 653                 // inertie
 654                         var t = (new Date()).getTime() - t0;
 655                         if (t < d) {
 656                                 setTimeout(animate, dt);
 657                                 delta = delta + (1-t/d) * speed * dt; // décelleration linéaire
 658                                 self.setFilmPosition(x0 + delta);
 659                         }
 660                 }
 661                 animate();
 662         }
 663         }
 664         this.touchStartX = undefined;
 665 };
 666
 667
 668 FilmSlider.prototype.keyDownHandler = function(evt) {
 669         evt = getEventObject(evt);
 670         switch (evt.keyCode) {
 671                 case keyLeft :
 672                         this.loadSibling(true);
 673                         break;
 674                 case keyRight :
 675                         this.loadSibling(false);
 676                         break;
 677                 default:
 678                         return;
 679         }
 680 };
 681
 682
 683 FilmSlider.prototype.keyPressHandler = function(evt) {
 684         var target = getTargetedObject(evt);
 685         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 686         evt = getEventObject(evt);
 687         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 688         switch(charPress) {
 689                 case 'f':
 690                 case 'F':
 691                         raiseMouseEvent(this.buttons.full_screen, 'click');
 692                         break;
 693         }
 694 };
 695
 696 FilmSlider.prototype.populateViewer = function(req) {
 697         var elements = req.responseXML.documentElement.childNodes;
 698         var i;
 699         for(i=0 ; i < elements.length ; i++ ) {
 700                 element = elements[i];
 701                 switch (element.nodeName) {
 702                         case 'fragment' :
 703                                 var dest = document.getElementById(element.getAttribute('id'));
 704                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 705                                 break;
 706                         case 'imageattributes' :
 707                                 var link = this.buttons.back_to_portfolio.parentNode;
 708                                 link.href = element.getAttribute('back_to_context_url');
 709                                 link = this.buttons.show_buyable.parentNode;
 710                                 var buyable = element.getAttribute('buyable');
 711                                 if(buyable === 'True') { link.className = null; }
 712                                 else if(buyable === 'False') { link.className = 'hidden'; }
 713                                 this.image.alt = element.getAttribute('alt');
 714                                 this.updateBreadcrumbs(element.getAttribute('last_bc_url'),
 715                                                                            element.getAttribute('img_id'));
 716                                 break;
 717                 }
 718         }
 719 };
 720
 721 FilmSlider.prototype.refreshImage = function() {
 722         this.image.style.visibility = 'hidden';
 723         this.image.src = this.pendingImage.src;
 724         this.image.width = this.pendingImage.width;
 725         this.image.height = this.pendingImage.height;
 726         this.image.style.visibility = 'visible';
 727         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 728         else { this.image.parentNode.className = ''; }
 729 };
 730
 731 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 732         if (this.hasBreadcrumbs) {
 733                 this.lastBCElement.href = url;
 734                 this.lastBCElement.innerHTML = title;
 735         }
 736 };
 737
 738 FilmSlider.prototype.startThumbnailsLoadQueue = function(evt) {
 739         var thumbnails = this.film.getElementsByTagName('img');
 740         if (thumbnails.length === 1) { return; }
 741         this.thumbnailsLoadingOrder = [];
 742         var leftSize = this.center;
 743         var rightSize = thumbnails.length - this.center - 1;
 744         var i;
 745         for (i=1 ; i<=Math.min(leftSize, rightSize) ; i++) {
 746                 this.thumbnailsLoadingOrder.push(thumbnails[this.center + i]);
 747                 this.thumbnailsLoadingOrder.push(thumbnails[this.center - i]);
 748         }
 749         if (leftSize > rightSize) {
 750                 for (i = this.center - rightSize - 1 ; i >= 0 ; i--) {
 751                         console.log(i);
 752                         this.thumbnailsLoadingOrder.push(thumbnails[i]);
 753                 }
 754         }
 755         else if (leftSize < rightSize) {
 756                 for (i = this.center + leftSize ; i < thumbnails.length ; i++) {
 757                         this.thumbnailsLoadingOrder.push(thumbnails[i]);
 758                 }
 759         }
 760         var next = this.thumbnailsLoadingOrder.shift();
 761         var self = this;
 762         addListener(next, 'load', function(evt){self._loadNextThumb(evt);});
 763         next.src = this.translateImgUrl(next.parentNode.href) + '/getThumbnail';
 764 };
 765
 766 FilmSlider.prototype._loadNextThumb = function(evt) {
 767         var next = this.thumbnailsLoadingOrder.shift();
 768         if (!next) {return;}
 769         var self = this;
 770         addListener(next, 'load', function(evt){self._loadNextThumb(evt);});
 771         next.src = this.translateImgUrl(next.parentNode.href) + '/getThumbnail';
 772 };
 773
 774
 775 FilmSlider.prototype.startSlideShow = function() {
 776         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 777         return this.slideShowSlide.href;
 778 };
 779
 780 FilmSlider.prototype.slideShowNext = function() {
 781         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 782         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 783
 784         if (nextSlide) {
 785                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 786                 this.pendingSlideShowSlide = nextSlide;
 787                 return this.pendingSlideShowSlide.href;
 788         }
 789         else {
 790                 var row = this.slideShowSlide.parentNode.parentNode;
 791                 var first = row.firstChild;
 792                 if (first.nodeType===3) { first = first.nextSibling; }
 793                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 794                 return this.pendingSlideShowSlide.href;
 795         }
 796 };
 797
 798 FilmSlider.prototype.slideShowPrevious = function() {
 799         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 800         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 801
 802         if (previousSlide) {
 803                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 804                 this.pendingSlideShowSlide = previousSlide;
 805                 return this.pendingSlideShowSlide.href;
 806         }
 807         else {
 808                 var row = this.slideShowSlide.parentNode.parentNode;
 809                 var last = row.lastChild;
 810                 if (last.nodeType===3) { last = last.previousSibling; }
 811                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 812                 return this.pendingSlideShowSlide.href;
 813         }
 814 };
 815
 816 FilmSlider.prototype.slideShowImageLoaded = function() {
 817         this.slideShowSlide = this.pendingSlideShowSlide;
 818 };
 819
 820 FilmSlider.prototype.stopSlideShow = function() {
 821         raiseMouseEvent(this.slideShowSlide, 'click');
 822         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 823         this.centerSlide(index);
 824 };
 825
 826
 827 /* UTILS */
 828 function Point(x, y) {
 829         this.x = Math.round(x);
 830         this.y = Math.round(y);
 831 }
 832 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 833 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 834 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 835 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 836
 837 }());