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 var s;
   9
  10 (function(){
  11
  12 var keyLeft = 37, keyRight = 39;
  13 var isTextMime = /^text\/.+/i;
  14 var isAddToSelection = /.*\/add_to_selection$/;
  15 var imgRequestedSize = /size=(\d+)/;
  16 var DEFAULT_IMAGE_SIZES = [500, 600, 800];
  17
  18 FilmSlider = function(filmBar, slider, ctxInfos, image, toolbar, breadcrumbs) {
  19         var thisSlider = this;
  20         s = this;
  21         this.filmBar = filmBar;
  22         this.filmBarWidth = getObjectWidth(this.filmBar);
  23         var film = filmBar.firstChild;
  24         if (film.nodeType === 3) { film = film.nextSibling; }
  25         this.film = film;
  26         this.slider = slider;
  27         this.rail = slider.parentNode;
  28         this.sliderSpeedRatio = undefined;
  29         this.sliderRatio = undefined;
  30         this.selectedSlide = undefined;
  31         this.selectedSlideInSelection = undefined;
  32         this.cartSlide = document.getElementById('cart_slide');
  33         this.image = image;
  34         this.stretchable = image.parentNode;
  35         this.viewMode = 'medium';
  36
  37         this.buttons = [];
  38         this.toolbar = toolbar;
  39         if (breadcrumbs) {
  40                 var bcElements = breadcrumbs.getElementsByTagName('a');
  41                 this.lastBCElement = bcElements[bcElements.length-1];
  42                 var imgSrcParts = image.src.split('/');
  43                 this.lastBCElement.innerHTML = imgSrcParts[imgSrcParts.length-2];
  44                 this.hasBreadcrumbs = true;
  45         }
  46         else {
  47                 this.hasBreadcrumbs = false;
  48         }
  49
  50         var buttons = toolbar.getElementsByTagName('img');
  51         var b, name, i;
  52         for (i=0 ; i<buttons.length ; i++) {
  53                 b = buttons[i];
  54                 name = b.getAttribute('name');
  55                 if (name) { this.buttons[name] = b; }
  56         }
  57
  58         this.pendingImage = new Image();
  59         this.pendingImage.onload = function() {
  60                 thisSlider.refreshImage();
  61         };
  62         this.initialized = false;
  63
  64         this.film.style.left='0';
  65         this.film.style.top='0';
  66
  67         this.filmLength = ctxInfos.filmLength;
  68         this.center = ctxInfos.center;
  69         this.slideSize = ctxInfos.slideSize;
  70         this.ctxUrlTranslation = ctxInfos.ctxUrlTranslation;
  71
  72         this.ddHandlers = {'down' : function(evt){thisSlider.mouseDownHandler(evt);},
  73                                            'move' : function(evt){thisSlider.mouseMoveHandler(evt);},
  74                                            'up' :       function(evt){thisSlider.mouseUpHandler(evt);},
  75                                            'out' :      function(evt){thisSlider.mouseOutHandler(evt);}
  76                                           };
  77
  78         if (browser.isMobile) {
  79                 this.rail.className = 'hidden';
  80         }
  81         else {
  82                 this.resizeSlider();
  83         }
  84         this.addEventListeners();
  85 };
  86
  87 if (!browser.isMobile) {
  88         FilmSlider.prototype.resizeSlider = function(evt) {
  89                 var filmBarWidth = this.filmBarWidth;
  90                 if (!filmBarWidth) { return; }
  91                 var filmWidth = this.slideSize * this.filmLength;
  92                 var sliderRatio = this.sliderRatio =  filmBarWidth / filmWidth;
  93                 var sliderWidth = filmBarWidth * sliderRatio;
  94                 this.rail.style.width = filmBarWidth + 'px';
  95                 this.rail.style.display = 'block';
  96                 this.rail.style.visibility = 'visible';
  97                 if (sliderRatio < 1) {
  98                         this.slider.style.width = Math.round(sliderWidth) + 'px';
  99                         this.slider.style.visibility = 'visible';
 100                 }
 101                 else {
 102                         this.slider.style.visibility = 'hidden';
 103                 }
 104
 105                 this.winSize = {'width'  : getWindowWidth(),
 106                                                 'height' : getWindowHeight()};
 107                 this.maxRightPosition = filmBarWidth - sliderWidth;
 108                 this.sliderSpeedRatio = - (filmBarWidth - sliderWidth) / (filmWidth - filmBarWidth);
 109                 if (!this.initialized) {
 110                         this.centerSlide(this.center);
 111                         this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 112                         this.initialized = true;
 113                 }
 114         };
 115 }
 116
 117 else {
 118         // pas de barre de scroll horizontal pour les tablettes
 119         FilmSlider.prototype.resizeSlider = function(evt) {
 120                 this.filmMaxX = - (getObjectWidth(this.film) - this.filmBarWidth);
 121                 if (!this.initialized) {
 122                         this.centerSlide(this.center);
 123                         this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 124                         this.initialized = true;
 125                 }
 126         };
 127 }
 128
 129 FilmSlider.prototype._checkSizeAfterLoad = function(evt) {
 130         this._barSizes = [];
 131         this.filmBarWidth = this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 132         this.resizeSlider();
 133         var self = this;
 134         this._checkSizeIntervalId = setInterval(function(evt){self._checkSize(evt);}, 25);
 135         setTimeout(function(evt){self._checkSizeStability();}, 250);
 136 };
 137
 138 FilmSlider.prototype._checkSize = function(evt) {
 139         this._barSizes[this._barSizes.length] = getObjectWidth(this.filmBar);
 140         if (this._barSizes.length >= 2 &&
 141                 this._barSizes[this._barSizes.length-2] !== this._barSizes[this._barSizes.length-1]) {
 142                 this.filmBarWidth = this._barSizes[this._barSizes.length-1];
 143                 this.initialized = false;
 144                 this.resizeSlider();
 145         }
 146 };
 147
 148 FilmSlider.prototype._checkSizeStability = function(evt) {
 149         var self = this;
 150         var i;
 151         for (i=0 ; i<this._barSizes.length - 1 ; i++) {
 152                 if (this._barSizes[i] !== this._barSizes[i+1]) {
 153                         this._barSizes = [];
 154                         setTimeout(function(evt){self._checkSizeStability();}, 250);
 155                         return;
 156                 }
 157         }
 158         clearInterval(this._checkSizeIntervalId);
 159         delete this._barSizes;
 160         delete this._checkSizeIntervalId;
 161 };
 162
 163 FilmSlider.prototype.fitToScreen = function(evt) {
 164         this._fitToScreen();
 165         var thisSlider = this;
 166         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 167 };
 168
 169 FilmSlider.prototype._fitToScreen = function(evt) {
 170         var wh = getWindowHeight();
 171         if (!browser.isMobile) {
 172                 var rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 173         }
 174         else {
 175                 var rb = getObjectTop(this.filmBar) + getObjectHeight(this.filmBar); // film bottom
 176         }
 177         var delta = wh - rb;
 178         var sh = getObjectHeight(this.stretchable);
 179         var newSize = sh + delta;
 180         this.stretchable.style.height = newSize + 'px';
 181
 182         var ratio = this.image.height / this.image.width;
 183         var bestFitSize = this.getBestFitSize(ratio);
 184         var currentSize = parseInt(imgRequestedSize.exec(this.image.src)[1], 10);
 185         if (currentSize !== bestFitSize) {
 186                 var src = this.image.src.replace(imgRequestedSize, 'size=' + bestFitSize);
 187                 this.pendingImage.src = src;
 188         }
 189 };
 190
 191 FilmSlider.prototype.getBestFitSize = function(ratio) {
 192         var fw = getObjectWidth(this.stretchable) - 1;
 193         var fh = getObjectHeight(this.stretchable) - 1;
 194
 195         var i, irw, irh;
 196         if (ratio < 1) {
 197                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 198                         irw = DEFAULT_IMAGE_SIZES[i];
 199                         irh = irw * ratio;
 200                         if (irw <= fw && irh <= fh) { break; }
 201                 }
 202         }
 203         else {
 204                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 205                         irh = DEFAULT_IMAGE_SIZES[i];
 206                         irw = irh / ratio;
 207                         if (irw <= fw && irh <= fh) { break; }
 208                 }
 209         }
 210         return DEFAULT_IMAGE_SIZES[i];
 211 };
 212
 213 if (!browser.isMobile) {
 214         FilmSlider.prototype.centerSlide = function(slideIndex) {
 215                 if (this.sliderRatio > 1) { return; }
 216                 var filmBarWidth = getObjectWidth(this.filmBar);
 217                 var x = slideIndex * this.slideSize;
 218                 x = x - (filmBarWidth - this.slideSize) / 2.0;
 219                 x = x * this.sliderSpeedRatio;
 220                 var p = new Point( -x, 0 );
 221                 this.setSliderPosition(p);
 222         };
 223 }
 224 else {
 225         FilmSlider.prototype.centerSlide = function(slideIndex) {
 226                 var filmBarWidth = getObjectWidth(this.filmBar);
 227                 var x = slideIndex * this.slideSize;
 228                 x = x - (filmBarWidth - this.slideSize) / 2.0;
 229                 this.setFilmPosition(-x);
 230         };
 231 }
 232
 233 FilmSlider.prototype.setSliderPosition = function(point) {
 234         if(point.x < 0) { point.x = 0; }
 235         if (point.x > this.maxRightPosition) { point.x = this.maxRightPosition; }
 236         this.slider.style.left = point.x + 'px';
 237         this.setFilmPosition(point);
 238 };
 239
 240 if (!browser.isMobile) {
 241         FilmSlider.prototype.setFilmPosition = function(point) {
 242                 this.film.style.left = point.x / this.sliderSpeedRatio + 'px';
 243         };
 244 }
 245 else {
 246         FilmSlider.prototype.setFilmPosition = function(x) {
 247                 x = Math.min(0, x);
 248                 x = Math.max(this.filmMaxX, x);
 249                 this.film.style.left = String(x) + 'px';
 250         };
 251 }
 252
 253 FilmSlider.prototype.getSliderPosition = function() {
 254         var x = parseInt(this.slider.style.left, 10);
 255         var y = parseInt(this.slider.style.top, 10);
 256         var p = new Point(x, y);
 257         return p;
 258 };
 259
 260 FilmSlider.prototype.getFilmPosition = function() {
 261         var x = parseInt(this.film.style.left, 10);
 262         var y = parseInt(this.film.style.top, 10);
 263         var p = new Point(x, y);
 264         return p;
 265 };
 266
 267 FilmSlider.prototype.loadSibling = function(previous) {
 268         var slide = null;
 269         if (previous) {
 270                 slide = this.selectedSlide.parentNode.previousSibling;
 271                 if (slide && slide.nodeType===3) { slide = slide.previousSibling; }
 272         }
 273         else {
 274                 slide = this.selectedSlide.parentNode.nextSibling;
 275                 if (slide && slide.nodeType===3) { slide = slide.nextSibling; }
 276         }
 277
 278         if (!slide) { return; }
 279         else {
 280                 var target = slide.getElementsByTagName('a')[0];
 281                 raiseMouseEvent(target, 'click');
 282                 var index = parseInt(target.getAttribute('portfolio:position'), 10);
 283                 this.centerSlide(index);
 284         }
 285 };
 286
 287 FilmSlider.prototype.addEventListeners = function() {
 288         var thisSlider = this;
 289         addListener(window, 'resize', function(evt){thisSlider.resizeSlider(evt);});
 290         addListener(this.filmBar, 'click', function(evt){thisSlider.thumbnailClickHandler(evt);});
 291         addListener(this.toolbar, 'click', function(evt){thisSlider.toolbarClickHandler(evt);});
 292         addListener(window, 'load', function(evt){thisSlider.fitToScreen(evt);});
 293         addListener(window, 'load', function(evt){thisSlider._checkSizeAfterLoad(evt);});
 294         addListener(window, 'load', function(evt){thisSlider.startThumbnailsLoadQueue(evt);});
 295
 296         // dd listeners
 297         addListener(this.slider, 'mousedown', this.ddHandlers.down);
 298         if(browser.isDOM2Event){
 299                 if (browser.isAppleWebKit) {
 300                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 301                 }
 302                 else {
 303                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 304                 }
 305         }
 306         else if (browser.isIE6up) {
 307                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 308         }
 309         if (browser.isMobile) {
 310                 this.filmBar.addEventListener('touchstart', function(evt){thisSlider.touchStartHandler(evt);}, false);
 311                 this.filmBar.addEventListener('touchmove', function(evt){thisSlider.touchMoveHandler(evt);}, false);
 312                 this.filmBar.addEventListener('touchend', function(evt){thisSlider.touchEndHandler(evt);}, false);
 313         }
 314
 315         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 316         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 317 };
 318
 319
 320 FilmSlider.prototype.mouseDownHandler = function(evt) {
 321         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 322         this.initialPosition = this.getSliderPosition();
 323         this.dragInProgress = true;
 324         addListener(document, 'mousemove', this.ddHandlers.move);
 325         addListener(document, 'mouseup', this.ddHandlers.up);
 326         addListener(document.body, 'mouseout', this.ddHandlers.out);
 327 };
 328
 329
 330 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 331         if(!this.dragInProgress) { return; }
 332
 333         clearSelection();
 334         evt = getEventObject(evt);
 335         var currentPoint = new Point(evt.clientX, evt.clientY);
 336         var displacement = currentPoint.diff(this.initialClickPoint);
 337         this.setSliderPosition(this.initialPosition.add(displacement));
 338 };
 339
 340 FilmSlider.prototype.mouseUpHandler = function(evt) {
 341         this.dragInProgress = false;
 342         evt = getEventObject(evt);
 343         this.mouseMoveHandler(evt);
 344 };
 345
 346
 347 FilmSlider.prototype.mouseOutHandler = function(evt) {
 348         evt = getEventObject(evt);
 349         var x = evt.clientX;
 350         var y = evt.clientY;
 351         if (x < 0 ||
 352                 x > this.winSize.width ||
 353                 y < 0 ||
 354                 y > this.winSize.height
 355                 ) {
 356                 this.mouseUpHandler(evt);
 357         }
 358 };
 359
 360 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 361         var target = getTargetedObject(evt);
 362         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 363         if (target.tagName !== 'A') { return; }
 364         else {
 365                 if (this.viewMode === 'full') {
 366                         this.mosaique.unload();
 367                         this.mosaique = null;
 368                         this.viewMode = 'medium';
 369                 }
 370                 disableDefault(evt);
 371                 disablePropagation(evt);
 372                 target.blur();
 373                 history.pushState(target.href, '', target.href);
 374
 375                 var imgBaseUrl = target.href;
 376                 var canonicalImgUrl;
 377                 if (this.ctxUrlTranslation[0]) {
 378                         canonicalImgUrl = imgBaseUrl.replace(this.ctxUrlTranslation[0],
 379                                                                                                  this.ctxUrlTranslation[1]);
 380                 }
 381                 else { canonicalImgUrl = imgBaseUrl; }
 382
 383                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 384                 var thisFS = this;
 385
 386                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 387                 var thumbnail = target.getElementsByTagName('IMG')[0];
 388                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 389                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 390
 391                 // update buttons
 392                 var fullScreenLink = this.buttons.full_screen.parentNode;
 393                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 394
 395                 var toggleSelectionBtn = this.buttons.toggle_selection;
 396                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 397                 this.selectedSlideInSelection = (target.className==='selected');
 398                 if (this.selectedSlideInSelection) {
 399                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 400                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 401                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 402                 }
 403                 else {
 404                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 405                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 406                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 407                 }
 408
 409                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 410                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 411                 this.cartSlide.innerHTML = '';
 412                 this.cartSlide.style.visibility='hidden';
 413
 414
 415                 var metadataButton = this.buttons.edit_metadata;
 416                 if (metadataButton) {
 417                         var metadataEditLink = metadataButton.parentNode;
 418                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 419                 }
 420
 421
 422                 var req = new XMLHttpRequest();
 423                 req.onreadystatechange = function() {
 424                         switch (req.readyState) {
 425                                 case 1 :
 426                                         showProgressImage();
 427                                         break;
 428                                 case 2 :
 429                                         try {
 430                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 431                                                         req.onreadystatechange = null;
 432                                                         req.abort();
 433                                                         hideProgressImage();
 434                                                         window.location.href = thisFS._fallBackUrl;
 435                                                 }
 436                                         }
 437                                         catch(e){}
 438                                         break;
 439                                 case 4 :
 440                                         hideProgressImage();
 441                                         if (req.status === 200) { thisFS.populateViewer(req); }
 442                                         break;
 443                         }
 444                 };
 445
 446                 req.open("GET", ajaxUrl, true);
 447                 req.send(null);
 448
 449                 // update old displayed slide className
 450                 var className = this.selectedSlide.className;
 451                 var classes = className.split(' ');
 452                 var newClasses = [];
 453                 var name, i;
 454
 455                 for (i=0 ; i<classes.length ;  i++) {
 456                         name = classes[i];
 457                         if (name !== 'displayed') {
 458                                 newClasses.push(name);
 459                         }
 460                 }
 461
 462                 this.selectedSlide.className = newClasses.join(' ');
 463
 464                 // hightlight new displayed slide
 465                 this.selectedSlide = target;
 466                 className = this.selectedSlide.className;
 467                 classes = className.split(' ');
 468                 classes.push('displayed');
 469                 this.selectedSlide.className = classes.join(' ');
 470         }
 471 };
 472
 473 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 474         var target = getTargetedObject(evt);
 475         var button, link, url;
 476         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 477                 switch(target.getAttribute('name')) {
 478                         case 'previous' :
 479                                 disableDefault(evt);
 480                                 disablePropagation(evt);
 481                                 button = target;
 482                                 link = button.parentNode;
 483                                 link.blur();
 484                                 this.loadSibling(true);
 485                                 break;
 486                         case 'next' :
 487                                 disableDefault(evt);
 488                                 disablePropagation(evt);
 489                                 button = target;
 490                                 link = button.parentNode;
 491                                 link.blur();
 492                                 this.loadSibling(false);
 493                                 break;
 494                         case 'full_screen':
 495                                 disableDefault(evt);
 496                                 disablePropagation(evt);
 497                                 target.parentNode.blur();
 498                                 if (this.viewMode === 'full') {
 499                                         this.mosaique.unload();
 500                                         this.mosaique = null;
 501                                         this.viewMode = 'medium';
 502                                         return;
 503                                 }
 504                                 var main = document.getElementById('photo_viewer');
 505                                 url = target.parentNode.href;
 506                                 url = url.substring(0, url.length - '/zoom_view'.length);
 507                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 508                                 this.mosaique = new Mosaique(main, url, margins);
 509                                 this.viewMode = 'full';
 510                                 break;
 511
 512                         case 'toggle_selection':
 513                                 disableDefault(evt);
 514                                 disablePropagation(evt);
 515                                 button = target;
 516                                 link = button.parentNode;
 517                                 link.blur();
 518
 519                                 var req = new XMLHttpRequest();
 520                                 url = link.href;
 521                                 req.open("POST", url, true);
 522                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 523                                 req.send("ajax=1");
 524
 525                                 // toggle button
 526                                 var parts = url.split('/');
 527                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 528
 529                                 if (isAddToSelection.test(url)) {
 530                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 531                                         button.alt = link.title = 'Retirer de la sélection';
 532                                         link.href = canonicalImgUrl + '/remove_to_selection';
 533                                         this.selectedSlide.className = 'selected displayed';
 534                                         this.image.parentNode.className = 'selected';
 535                                         this.selectedSlideInSelection = true;
 536                                 }
 537                                 else {
 538                                         button.src = portal_url() + '/select_flag_btn.gif';
 539                                         button.alt = link.title = 'Ajouter à la sélection';
 540                                         link.href = canonicalImgUrl + '/add_to_selection';
 541                                         this.selectedSlide.className = 'displayed';
 542                                         this.image.parentNode.className = '';
 543                                         this.selectedSlideInSelection = false;
 544                                 }
 545                                 break;
 546
 547                         case 'show_buyable':
 548                                 disableDefault(evt);
 549                                 disablePropagation(evt);
 550                                 button = target;
 551                                 link = button.parentNode;
 552                                 link.blur();
 553                                 var slide = this.cartSlide;
 554                                 slide.innerHTML = '';
 555                                 slide.style.visibility = 'visible';
 556                                 var cw = new CartWidget(slide, link.href);
 557                                 cw.onCancel = function() {
 558                                         CartWidget.prototype.onCancel.apply(this);
 559                                         slide.style.visibility = 'hidden';
 560                                 };
 561                                 cw.onAfterConfirm = function() {
 562                                         slide.style.visibility = 'hidden';
 563                                 };
 564                                 break;
 565
 566
 567
 568
 569                         /*
 570                         case 'edit_metadata' :
 571                                 disableDefault(evt);
 572                                 disablePropagation(evt);
 573                                 target.blur();
 574                                 if (this.viewMode === 'full') {
 575                                         this.mosaique.unload();
 576                                         this.mosaique = null;
 577                                         this.viewMode = 'medium';
 578                                         return;
 579                                 }
 580                                 var fi = new FragmentImporter(absolute_url());
 581                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 582                                 break;
 583                         */
 584                 }
 585         }
 586 };
 587
 588
 589 if(browser.isDOM2Event) {
 590         if (browser.isAppleWebKit) {
 591                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 592                         disableDefault(evt);
 593                         var pos = this.getSliderPosition();
 594                         pos.x -= evt.wheelDelta / 40;
 595                         this.setSliderPosition(pos);
 596                 };
 597         }
 598         else {
 599                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 600                         disableDefault(evt);
 601                         var pos = this.getSliderPosition();
 602                         pos.x += evt.detail * 3;
 603                         this.setSliderPosition(pos);
 604                 };
 605         }
 606 }
 607 else if (browser.isIE6up) {
 608         FilmSlider.prototype.mouseWheelHandler = function() {
 609                 var evt = window.event;
 610                 evt.returnValue = false;
 611                 var pos = this.getSliderPosition();
 612                 pos.x -= evt.wheelDelta / 40;
 613                 this.setSliderPosition(pos);
 614         };
 615 }
 616
 617 FilmSlider.prototype.touchStartHandler = function(evt) {
 618         this.filmStartX = parseInt(this.film.style.left, 10);
 619         this.touchStartX = evt.changedTouches[0].screenX;
 620         this.touchStartTime = (new Date()).getTime();
 621 };
 622
 623 FilmSlider.prototype.touchMoveHandler = function(evt) {
 624         disableDefault(evt);
 625         var delta = this.touchStartX - evt.changedTouches[0].screenX;
 626         var posX = this.filmStartX - delta;
 627         this.setFilmPosition(posX);
 628     this.lastMoveTime = (new Date()).getTime();
 629 };
 630
 631 FilmSlider.prototype.touchEndHandler = function(evt) {
 632     var x = evt.changedTouches[0].screenX;
 633         var delta = x - this.touchStartX;
 634         if (delta) {
 635                 disableDefault(evt);
 636         var now = (new Date()).getTime();
 637         if (now - this.lastMoveTime < 100) {
 638             // au delà de 100 ms de maintient, on annule l'inertie
 639                 var speed = delta / (now - this.touchStartTime)
 640                 var x0 = parseInt(this.film.style.left, 10);
 641                 var t0 = (new Date()).getTime();
 642                 var d = 500; // milisecondes
 643             var delta = 0;
 644             var dt = 25
 645                 var self = this;
 646
 647                 function animate() {
 648                 // inertie
 649                         var t = (new Date()).getTime() - t0;
 650                         if (t < d) {
 651                                 setTimeout(animate, dt);
 652                                 delta = delta + (1-t/d) * speed * dt; // décelleration linéaire
 653                                 self.setFilmPosition(x0 + delta);
 654                         }
 655                 }
 656                 animate();
 657         }
 658         }
 659         this.touchStartX = undefined;
 660 };
 661
 662
 663 FilmSlider.prototype.keyDownHandler = function(evt) {
 664         evt = getEventObject(evt);
 665         switch (evt.keyCode) {
 666                 case keyLeft :
 667                         this.loadSibling(true);
 668                         break;
 669                 case keyRight :
 670                         this.loadSibling(false);
 671                         break;
 672                 default:
 673                         return;
 674         }
 675 };
 676
 677
 678 FilmSlider.prototype.keyPressHandler = function(evt) {
 679         var target = getTargetedObject(evt);
 680         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 681         evt = getEventObject(evt);
 682         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 683         switch(charPress) {
 684                 case 'f':
 685                 case 'F':
 686                         raiseMouseEvent(this.buttons.full_screen, 'click');
 687                         break;
 688         }
 689 };
 690
 691 FilmSlider.prototype.populateViewer = function(req) {
 692         var elements = req.responseXML.documentElement.childNodes;
 693         var i;
 694         for(i=0 ; i < elements.length ; i++ ) {
 695                 element = elements[i];
 696                 switch (element.nodeName) {
 697                         case 'fragment' :
 698                                 var dest = document.getElementById(element.getAttribute('id'));
 699                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 700                                 break;
 701                         case 'imageattributes' :
 702                                 var link = this.buttons.back_to_portfolio.parentNode;
 703                                 link.href = element.getAttribute('back_to_context_url');
 704                                 link = this.buttons.show_buyable.parentNode;
 705                                 var buyable = element.getAttribute('buyable');
 706                                 if(buyable === 'True') { link.className = null; }
 707                                 else if(buyable === 'False') { link.className = 'hidden'; }
 708                                 this.image.alt = element.getAttribute('alt');
 709                                 this.updateBreadcrumbs(element.getAttribute('last_bc_url'),
 710                                                                            element.getAttribute('img_id'));
 711                                 break;
 712                 }
 713         }
 714 };
 715
 716 FilmSlider.prototype.refreshImage = function() {
 717         this.image.style.visibility = 'hidden';
 718         this.image.src = this.pendingImage.src;
 719         this.image.width = this.pendingImage.width;
 720         this.image.height = this.pendingImage.height;
 721         this.image.style.visibility = 'visible';
 722         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 723         else { this.image.parentNode.className = ''; }
 724 };
 725
 726 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 727         if (this.hasBreadcrumbs) {
 728                 this.lastBCElement.href = url;
 729                 this.lastBCElement.innerHTML = title;
 730         }
 731 };
 732
 733 FilmSlider.prototype.startThumbnailsLoadQueue = function(evt) {
 734         var thumbnails = this.film.getElementsByTagName('img');
 735         this.thumbnailsLoadingOrder = [];
 736         var leftSize = this.center;
 737         var rightSize = thumbnails.length - this.center - 1;
 738         var i;
 739         for (i=1 ; i<=Math.min(leftSize, rightSize) ; i++) {
 740                 this.thumbnailsLoadingOrder.push(thumbnails[this.center + i]);
 741                 this.thumbnailsLoadingOrder.push(thumbnails[this.center - i]);
 742         }
 743         if (leftSize > rightSize) {
 744                 for (i = this.center - rightSize - 1 ; i >= 0 ; i--) {
 745                         console.log(i);
 746                         this.thumbnailsLoadingOrder.push(thumbnails[i]);
 747                 }
 748         }
 749         else if (leftSize < rightSize) {
 750                 for (i = this.center + leftSize ; i < thumbnails.length ; i++) {
 751                         this.thumbnailsLoadingOrder.push(thumbnails[i]);
 752                 }
 753         }
 754         var next = this.thumbnailsLoadingOrder.shift();
 755         var self = this;
 756         addListener(next, 'load', function(evt){self._loadNextThumb(evt);});
 757         next.src = next.parentNode.href + '/getThumbnail';
 758 };
 759
 760 FilmSlider.prototype._loadNextThumb = function(evt) {
 761         var next = this.thumbnailsLoadingOrder.shift();
 762         if (!next) {return;}
 763         var self = this;
 764         addListener(next, 'load', function(evt){self._loadNextThumb(evt);});
 765         next.src = next.parentNode.href + '/getThumbnail';
 766 };
 767
 768
 769 FilmSlider.prototype.startSlideShow = function() {
 770         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 771         return this.slideShowSlide.href;
 772 };
 773
 774 FilmSlider.prototype.slideShowNext = function() {
 775         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 776         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 777
 778         if (nextSlide) {
 779                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 780                 this.pendingSlideShowSlide = nextSlide;
 781                 return this.pendingSlideShowSlide.href;
 782         }
 783         else {
 784                 var row = this.slideShowSlide.parentNode.parentNode;
 785                 var first = row.firstChild;
 786                 if (first.nodeType===3) { first = first.nextSibling; }
 787                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 788                 return this.pendingSlideShowSlide.href;
 789         }
 790 };
 791
 792 FilmSlider.prototype.slideShowPrevious = function() {
 793         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 794         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 795
 796         if (previousSlide) {
 797                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 798                 this.pendingSlideShowSlide = previousSlide;
 799                 return this.pendingSlideShowSlide.href;
 800         }
 801         else {
 802                 var row = this.slideShowSlide.parentNode.parentNode;
 803                 var last = row.lastChild;
 804                 if (last.nodeType===3) { last = last.previousSibling; }
 805                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 806                 return this.pendingSlideShowSlide.href;
 807         }
 808 };
 809
 810 FilmSlider.prototype.slideShowImageLoaded = function() {
 811         this.slideShowSlide = this.pendingSlideShowSlide;
 812 };
 813
 814 FilmSlider.prototype.stopSlideShow = function() {
 815         raiseMouseEvent(this.slideShowSlide, 'click');
 816         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 817         this.centerSlide(index);
 818 };
 819
 820
 821 /* UTILS */
 822 function Point(x, y) {
 823         this.x = Math.round(x);
 824         this.y = Math.round(y);
 825 }
 826 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 827 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 828 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 829 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 830
 831 }());