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
 293         // dd listeners
 294         addListener(this.slider, 'mousedown', this.ddHandlers.down);
 295         if(browser.isDOM2Event){
 296                 if (browser.isAppleWebKit) {
 297                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 298                 }
 299                 else {
 300                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 301                 }
 302         }
 303         else if (browser.isIE6up) {
 304                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 305         }
 306         if (browser.isMobile) {
 307                 this.filmBar.addEventListener('touchstart', function(evt){thisSlider.touchStartHandler(evt);}, false);
 308                 this.filmBar.addEventListener('touchmove', function(evt){thisSlider.touchMoveHandler(evt);}, false);
 309                 this.filmBar.addEventListener('touchend', function(evt){thisSlider.touchEndHandler(evt);}, false);
 310         }
 311
 312         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 313         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 314 };
 315
 316
 317 FilmSlider.prototype.mouseDownHandler = function(evt) {
 318         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 319         this.initialPosition = this.getSliderPosition();
 320         this.dragInProgress = true;
 321         addListener(document, 'mousemove', this.ddHandlers.move);
 322         addListener(document, 'mouseup', this.ddHandlers.up);
 323         addListener(document.body, 'mouseout', this.ddHandlers.out);
 324 };
 325
 326
 327 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 328         if(!this.dragInProgress) { return; }
 329
 330         clearSelection();
 331         evt = getEventObject(evt);
 332         var currentPoint = new Point(evt.clientX, evt.clientY);
 333         var displacement = currentPoint.diff(this.initialClickPoint);
 334         this.setSliderPosition(this.initialPosition.add(displacement));
 335 };
 336
 337 FilmSlider.prototype.mouseUpHandler = function(evt) {
 338         this.dragInProgress = false;
 339         evt = getEventObject(evt);
 340         this.mouseMoveHandler(evt);
 341 };
 342
 343
 344 FilmSlider.prototype.mouseOutHandler = function(evt) {
 345         evt = getEventObject(evt);
 346         var x = evt.clientX;
 347         var y = evt.clientY;
 348         if (x < 0 ||
 349                 x > this.winSize.width ||
 350                 y < 0 ||
 351                 y > this.winSize.height
 352                 ) {
 353                 this.mouseUpHandler(evt);
 354         }
 355 };
 356
 357 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 358         var target = getTargetedObject(evt);
 359         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 360         if (target.tagName !== 'A') { return; }
 361         else {
 362                 if (this.viewMode === 'full') {
 363                         this.mosaique.unload();
 364                         this.mosaique = null;
 365                         this.viewMode = 'medium';
 366                 }
 367                 disableDefault(evt);
 368                 disablePropagation(evt);
 369                 target.blur();
 370                 history.pushState(target.href, '', target.href);
 371
 372                 var imgBaseUrl = target.href;
 373                 var canonicalImgUrl;
 374                 if (this.ctxUrlTranslation[0]) {
 375                         canonicalImgUrl = imgBaseUrl.replace(this.ctxUrlTranslation[0],
 376                                                                                                  this.ctxUrlTranslation[1]);
 377                 }
 378                 else { canonicalImgUrl = imgBaseUrl; }
 379
 380                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 381                 var thisFS = this;
 382
 383                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 384                 var thumbnail = target.getElementsByTagName('IMG')[0];
 385                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 386                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 387
 388                 // update buttons
 389                 var fullScreenLink = this.buttons.full_screen.parentNode;
 390                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 391
 392                 var toggleSelectionBtn = this.buttons.toggle_selection;
 393                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 394                 this.selectedSlideInSelection = (target.className==='selected');
 395                 if (this.selectedSlideInSelection) {
 396                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 397                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 398                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 399                 }
 400                 else {
 401                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 402                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 403                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 404                 }
 405
 406                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 407                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 408                 this.cartSlide.innerHTML = '';
 409                 this.cartSlide.style.visibility='hidden';
 410
 411
 412                 var metadataButton = this.buttons.edit_metadata;
 413                 if (metadataButton) {
 414                         var metadataEditLink = metadataButton.parentNode;
 415                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 416                 }
 417
 418
 419                 var req = new XMLHttpRequest();
 420                 req.onreadystatechange = function() {
 421                         switch (req.readyState) {
 422                                 case 1 :
 423                                         showProgressImage();
 424                                         break;
 425                                 case 2 :
 426                                         try {
 427                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 428                                                         req.onreadystatechange = null;
 429                                                         req.abort();
 430                                                         hideProgressImage();
 431                                                         window.location.href = thisFS._fallBackUrl;
 432                                                 }
 433                                         }
 434                                         catch(e){}
 435                                         break;
 436                                 case 4 :
 437                                         hideProgressImage();
 438                                         if (req.status === 200) { thisFS.populateViewer(req); }
 439                                         break;
 440                         }
 441                 };
 442
 443                 req.open("GET", ajaxUrl, true);
 444                 req.send(null);
 445
 446                 // update old displayed slide className
 447                 var className = this.selectedSlide.className;
 448                 var classes = className.split(' ');
 449                 var newClasses = [];
 450                 var name, i;
 451
 452                 for (i=0 ; i<classes.length ;  i++) {
 453                         name = classes[i];
 454                         if (name !== 'displayed') {
 455                                 newClasses.push(name);
 456                         }
 457                 }
 458
 459                 this.selectedSlide.className = newClasses.join(' ');
 460
 461                 // hightlight new displayed slide
 462                 this.selectedSlide = target;
 463                 className = this.selectedSlide.className;
 464                 classes = className.split(' ');
 465                 classes.push('displayed');
 466                 this.selectedSlide.className = classes.join(' ');
 467         }
 468 };
 469
 470 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 471         var target = getTargetedObject(evt);
 472         var button, link, url;
 473         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 474                 switch(target.getAttribute('name')) {
 475                         case 'previous' :
 476                                 disableDefault(evt);
 477                                 disablePropagation(evt);
 478                                 button = target;
 479                                 link = button.parentNode;
 480                                 link.blur();
 481                                 this.loadSibling(true);
 482                                 break;
 483                         case 'next' :
 484                                 disableDefault(evt);
 485                                 disablePropagation(evt);
 486                                 button = target;
 487                                 link = button.parentNode;
 488                                 link.blur();
 489                                 this.loadSibling(false);
 490                                 break;
 491                         case 'full_screen':
 492                                 disableDefault(evt);
 493                                 disablePropagation(evt);
 494                                 target.parentNode.blur();
 495                                 if (this.viewMode === 'full') {
 496                                         this.mosaique.unload();
 497                                         this.mosaique = null;
 498                                         this.viewMode = 'medium';
 499                                         return;
 500                                 }
 501                                 var main = document.getElementById('photo_viewer');
 502                                 url = target.parentNode.href;
 503                                 url = url.substring(0, url.length - '/zoom_view'.length);
 504                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 505                                 this.mosaique = new Mosaique(main, url, margins);
 506                                 this.viewMode = 'full';
 507                                 break;
 508
 509                         case 'toggle_selection':
 510                                 disableDefault(evt);
 511                                 disablePropagation(evt);
 512                                 button = target;
 513                                 link = button.parentNode;
 514                                 link.blur();
 515
 516                                 var req = new XMLHttpRequest();
 517                                 url = link.href;
 518                                 req.open("POST", url, true);
 519                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 520                                 req.send("ajax=1");
 521
 522                                 // toggle button
 523                                 var parts = url.split('/');
 524                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 525
 526                                 if (isAddToSelection.test(url)) {
 527                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 528                                         button.alt = link.title = 'Retirer de la sélection';
 529                                         link.href = canonicalImgUrl + '/remove_to_selection';
 530                                         this.selectedSlide.className = 'selected displayed';
 531                                         this.image.parentNode.className = 'selected';
 532                                         this.selectedSlideInSelection = true;
 533                                 }
 534                                 else {
 535                                         button.src = portal_url() + '/select_flag_btn.gif';
 536                                         button.alt = link.title = 'Ajouter à la sélection';
 537                                         link.href = canonicalImgUrl + '/add_to_selection';
 538                                         this.selectedSlide.className = 'displayed';
 539                                         this.image.parentNode.className = '';
 540                                         this.selectedSlideInSelection = false;
 541                                 }
 542                                 break;
 543
 544                         case 'show_buyable':
 545                                 disableDefault(evt);
 546                                 disablePropagation(evt);
 547                                 button = target;
 548                                 link = button.parentNode;
 549                                 link.blur();
 550                                 var slide = this.cartSlide;
 551                                 slide.innerHTML = '';
 552                                 slide.style.visibility = 'visible';
 553                                 var cw = new CartWidget(slide, link.href);
 554                                 cw.onCancel = function() {
 555                                         CartWidget.prototype.onCancel.apply(this);
 556                                         slide.style.visibility = 'hidden';
 557                                 };
 558                                 cw.onAfterConfirm = function() {
 559                                         slide.style.visibility = 'hidden';
 560                                 };
 561                                 break;
 562
 563
 564
 565
 566                         /*
 567                         case 'edit_metadata' :
 568                                 disableDefault(evt);
 569                                 disablePropagation(evt);
 570                                 target.blur();
 571                                 if (this.viewMode === 'full') {
 572                                         this.mosaique.unload();
 573                                         this.mosaique = null;
 574                                         this.viewMode = 'medium';
 575                                         return;
 576                                 }
 577                                 var fi = new FragmentImporter(absolute_url());
 578                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 579                                 break;
 580                         */
 581                 }
 582         }
 583 };
 584
 585
 586 if(browser.isDOM2Event) {
 587         if (browser.isAppleWebKit) {
 588                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 589                         disableDefault(evt);
 590                         var pos = this.getSliderPosition();
 591                         pos.x -= evt.wheelDelta / 40;
 592                         this.setSliderPosition(pos);
 593                 };
 594         }
 595         else {
 596                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 597                         disableDefault(evt);
 598                         var pos = this.getSliderPosition();
 599                         pos.x += evt.detail * 3;
 600                         this.setSliderPosition(pos);
 601                 };
 602         }
 603 }
 604 else if (browser.isIE6up) {
 605         FilmSlider.prototype.mouseWheelHandler = function() {
 606                 var evt = window.event;
 607                 evt.returnValue = false;
 608                 var pos = this.getSliderPosition();
 609                 pos.x -= evt.wheelDelta / 40;
 610                 this.setSliderPosition(pos);
 611         };
 612 }
 613
 614 FilmSlider.prototype.touchStartHandler = function(evt) {
 615         this.filmStartX = parseInt(this.film.style.left, 10);
 616         this.touchStartX = evt.changedTouches[0].screenX;
 617         this.touchStartTime = (new Date()).getTime();
 618 };
 619
 620 FilmSlider.prototype.touchMoveHandler = function(evt) {
 621         disableDefault(evt);
 622         var delta = this.touchStartX - evt.changedTouches[0].screenX;
 623         var posX = this.filmStartX - delta;
 624         this.setFilmPosition(posX);
 625     this.lastMoveTime = (new Date()).getTime();
 626 };
 627
 628 FilmSlider.prototype.touchEndHandler = function(evt) {
 629     var x = evt.changedTouches[0].screenX;
 630         var delta = x - this.touchStartX;
 631         if (delta) {
 632                 disableDefault(evt);
 633         var now = (new Date()).getTime();
 634         if (now - this.lastMoveTime < 100) {
 635             // au delà de 100 ms de maintient, on annule l'inertie
 636                 var speed = delta / (now - this.touchStartTime)
 637                 var x0 = parseInt(this.film.style.left, 10);
 638                 var t0 = (new Date()).getTime();
 639                 var d = 500; // milisecondes
 640             var delta = 0;
 641             var dt = 25
 642                 var self = this;
 643
 644                 function animate() {
 645                 // inertie
 646                         var t = (new Date()).getTime() - t0;
 647                         if (t < d) {
 648                                 setTimeout(animate, dt);
 649                                 delta = delta + (1-t/d) * speed * dt; // décelleration linéaire
 650                                 self.setFilmPosition(x0 + delta);
 651                         }
 652                 }
 653                 animate();
 654         }
 655         }
 656         this.touchStartX = undefined;
 657 };
 658
 659
 660 FilmSlider.prototype.keyDownHandler = function(evt) {
 661         evt = getEventObject(evt);
 662         switch (evt.keyCode) {
 663                 case keyLeft :
 664                         this.loadSibling(true);
 665                         break;
 666                 case keyRight :
 667                         this.loadSibling(false);
 668                         break;
 669                 default:
 670                         return;
 671         }
 672 };
 673
 674
 675 FilmSlider.prototype.keyPressHandler = function(evt) {
 676         var target = getTargetedObject(evt);
 677         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 678         evt = getEventObject(evt);
 679         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 680         switch(charPress) {
 681                 case 'f':
 682                 case 'F':
 683                         raiseMouseEvent(this.buttons.full_screen, 'click');
 684                         break;
 685         }
 686 };
 687
 688 FilmSlider.prototype.populateViewer = function(req) {
 689         var elements = req.responseXML.documentElement.childNodes;
 690         var i;
 691         for(i=0 ; i < elements.length ; i++ ) {
 692                 element = elements[i];
 693                 switch (element.nodeName) {
 694                         case 'fragment' :
 695                                 var dest = document.getElementById(element.getAttribute('id'));
 696                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 697                                 break;
 698                         case 'imageattributes' :
 699                                 var link = this.buttons.back_to_portfolio.parentNode;
 700                                 link.href = element.getAttribute('back_to_context_url');
 701                                 link = this.buttons.show_buyable.parentNode;
 702                                 var buyable = element.getAttribute('buyable');
 703                                 if(buyable === 'True') { link.className = null; }
 704                                 else if(buyable === 'False') { link.className = 'hidden'; }
 705                                 this.image.alt = element.getAttribute('alt');
 706                                 this.updateBreadcrumbs(element.getAttribute('last_bc_url'),
 707                                                                            element.getAttribute('img_id'));
 708                                 break;
 709                 }
 710         }
 711 };
 712
 713 FilmSlider.prototype.refreshImage = function() {
 714         this.image.style.visibility = 'hidden';
 715         this.image.src = this.pendingImage.src;
 716         this.image.width = this.pendingImage.width;
 717         this.image.height = this.pendingImage.height;
 718         this.image.style.visibility = 'visible';
 719         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 720         else { this.image.parentNode.className = ''; }
 721 };
 722
 723 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 724         if (this.hasBreadcrumbs) {
 725                 this.lastBCElement.href = url;
 726                 this.lastBCElement.innerHTML = title;
 727         }
 728 };
 729
 730 FilmSlider.prototype.startSlideShow = function() {
 731         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 732         return this.slideShowSlide.href;
 733 };
 734
 735 FilmSlider.prototype.slideShowNext = function() {
 736         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 737         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 738
 739         if (nextSlide) {
 740                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 741                 this.pendingSlideShowSlide = nextSlide;
 742                 return this.pendingSlideShowSlide.href;
 743         }
 744         else {
 745                 var row = this.slideShowSlide.parentNode.parentNode;
 746                 var first = row.firstChild;
 747                 if (first.nodeType===3) { first = first.nextSibling; }
 748                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 749                 return this.pendingSlideShowSlide.href;
 750         }
 751 };
 752
 753 FilmSlider.prototype.slideShowPrevious = function() {
 754         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 755         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 756
 757         if (previousSlide) {
 758                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 759                 this.pendingSlideShowSlide = previousSlide;
 760                 return this.pendingSlideShowSlide.href;
 761         }
 762         else {
 763                 var row = this.slideShowSlide.parentNode.parentNode;
 764                 var last = row.lastChild;
 765                 if (last.nodeType===3) { last = last.previousSibling; }
 766                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 767                 return this.pendingSlideShowSlide.href;
 768         }
 769 };
 770
 771 FilmSlider.prototype.slideShowImageLoaded = function() {
 772         this.slideShowSlide = this.pendingSlideShowSlide;
 773 };
 774
 775 FilmSlider.prototype.stopSlideShow = function() {
 776         raiseMouseEvent(this.slideShowSlide, 'click');
 777         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 778         this.centerSlide(index);
 779 };
 780
 781
 782 /* UTILS */
 783 function Point(x, y) {
 784         this.x = Math.round(x);
 785         this.y = Math.round(y);
 786 }
 787 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 788 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 789 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 790 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 791
 792 }());