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         var checkAgain = function(evt){self._checkSizeStability();};
 150         for (i=0 ; i<this._barSizes.length - 1 ; i++) {
 151                 if (this._barSizes[i] !== this._barSizes[i+1]) {
 152                         this._barSizes = [];
 153                         setTimeout(checkAgain, 250);
 154                         return;
 155                 }
 156         }
 157         clearInterval(this._checkSizeIntervalId);
 158         delete this._barSizes;
 159         delete this._checkSizeIntervalId;
 160 };
 161
 162 FilmSlider.prototype.fitToScreen = function(evt) {
 163         this._fitToScreen();
 164         var thisSlider = this;
 165         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 166 };
 167
 168 FilmSlider.prototype._fitToScreen = function(evt) {
 169         var wh = getWindowHeight();
 170         var rb;
 171         if (!browser.isMobile) {
 172                 rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 173         }
 174         else {
 175                 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.translateImgUrl = function(url) {
 361         var canonicalImgUrl;
 362         if (this.ctxUrlTranslation[0]) {
 363                 canonicalImgUrl = url.replace(this.ctxUrlTranslation[0],
 364                                                                           this.ctxUrlTranslation[1]);
 365         }
 366         else {
 367                 canonicalImgUrl = url;
 368         }
 369         return canonicalImgUrl;
 370 };
 371
 372 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 373         var target = getTargetedObject(evt);
 374         while (target.tagName !== 'A' && target !== this.filmBar) { target = target.parentNode; }
 375         if (target.tagName !== 'A') { return; }
 376         else {
 377                 if (this.viewMode === 'full') {
 378                         this.mosaique.unload();
 379                         this.mosaique = null;
 380                         this.viewMode = 'medium';
 381                 }
 382                 disableDefault(evt);
 383                 disablePropagation(evt);
 384                 target.blur();
 385                 history.pushState(target.href, '', target.href);
 386
 387                 var imgBaseUrl = target.href;
 388                 var canonicalImgUrl = this.translateImgUrl(imgBaseUrl);
 389
 390                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 391                 var thisFS = this;
 392
 393                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 394                 var thumbnail = target.getElementsByTagName('IMG')[0];
 395                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 396                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 397
 398                 // update buttons
 399                 var fullScreenLink = this.buttons.full_screen.parentNode;
 400                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 401
 402                 var toggleSelectionBtn = this.buttons.toggle_selection;
 403                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 404                 this.selectedSlideInSelection = (target.className==='selected');
 405                 if (this.selectedSlideInSelection) {
 406                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 407                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 408                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 409                 }
 410                 else {
 411                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 412                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 413                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 414                 }
 415
 416                 var showBuyableButtonLink = this.buttons.show_buyable.parentNode;
 417                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 418                 this.cartSlide.innerHTML = '';
 419                 this.cartSlide.style.visibility='hidden';
 420
 421
 422                 var metadataButton = this.buttons.edit_metadata;
 423                 if (metadataButton) {
 424                         var metadataEditLink = metadataButton.parentNode;
 425                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form';
 426                 }
 427
 428
 429                 var req = new XMLHttpRequest();
 430                 req.onreadystatechange = function() {
 431                         switch (req.readyState) {
 432                                 case 1 :
 433                                         showProgressImage();
 434                                         break;
 435                                 case 2 :
 436                                         try {
 437                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 438                                                         req.onreadystatechange = null;
 439                                                         req.abort();
 440                                                         hideProgressImage();
 441                                                         window.location.href = thisFS._fallBackUrl;
 442                                                 }
 443                                         }
 444                                         catch(e){}
 445                                         break;
 446                                 case 4 :
 447                                         hideProgressImage();
 448                                         if (req.status === 200) { thisFS.populateViewer(req); }
 449                                         break;
 450                         }
 451                 };
 452
 453                 req.open("GET", ajaxUrl, true);
 454                 req.send(null);
 455
 456                 // update old displayed slide className
 457                 var className = this.selectedSlide.className;
 458                 var classes = className.split(' ');
 459                 var newClasses = [];
 460                 var name, i;
 461
 462                 for (i=0 ; i<classes.length ;  i++) {
 463                         name = classes[i];
 464                         if (name !== 'displayed') {
 465                                 newClasses.push(name);
 466                         }
 467                 }
 468
 469                 this.selectedSlide.className = newClasses.join(' ');
 470
 471                 // hightlight new displayed slide
 472                 this.selectedSlide = target;
 473                 className = this.selectedSlide.className;
 474                 classes = className.split(' ');
 475                 classes.push('displayed');
 476                 this.selectedSlide.className = classes.join(' ');
 477         }
 478 };
 479
 480 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 481         var target = getTargetedObject(evt);
 482         var button, link, url;
 483         if(target.tagName === 'IMG' && target.getAttribute('name')) {
 484                 switch(target.getAttribute('name')) {
 485                         case 'previous' :
 486                                 disableDefault(evt);
 487                                 disablePropagation(evt);
 488                                 button = target;
 489                                 link = button.parentNode;
 490                                 link.blur();
 491                                 this.loadSibling(true);
 492                                 break;
 493                         case 'next' :
 494                                 disableDefault(evt);
 495                                 disablePropagation(evt);
 496                                 button = target;
 497                                 link = button.parentNode;
 498                                 link.blur();
 499                                 this.loadSibling(false);
 500                                 break;
 501                         case 'full_screen':
 502                                 disableDefault(evt);
 503                                 disablePropagation(evt);
 504                                 target.parentNode.blur();
 505                                 if (this.viewMode === 'full') {
 506                                         this.mosaique.unload();
 507                                         this.mosaique = null;
 508                                         this.viewMode = 'medium';
 509                                         return;
 510                                 }
 511                                 var main = document.getElementById('photo_viewer');
 512                                 url = target.parentNode.href;
 513                                 url = url.substring(0, url.length - '/zoom_view'.length);
 514                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 515                                 this.mosaique = new Mosaique(main, url, margins);
 516                                 this.viewMode = 'full';
 517                                 break;
 518
 519                         case 'toggle_selection':
 520                                 disableDefault(evt);
 521                                 disablePropagation(evt);
 522                                 button = target;
 523                                 link = button.parentNode;
 524                                 link.blur();
 525
 526                                 var req = new XMLHttpRequest();
 527                                 url = link.href;
 528                                 req.open("POST", url, true);
 529                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 530                                 req.send("ajax=1");
 531
 532                                 // toggle button
 533                                 var parts = url.split('/');
 534                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 535
 536                                 if (isAddToSelection.test(url)) {
 537                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 538                                         button.alt = link.title = 'Retirer de la sélection';
 539                                         link.href = canonicalImgUrl + '/remove_to_selection';
 540                                         this.selectedSlide.className = 'selected displayed';
 541                                         this.image.parentNode.className = 'selected';
 542                                         this.selectedSlideInSelection = true;
 543                                 }
 544                                 else {
 545                                         button.src = portal_url() + '/select_flag_btn.gif';
 546                                         button.alt = link.title = 'Ajouter à la sélection';
 547                                         link.href = canonicalImgUrl + '/add_to_selection';
 548                                         this.selectedSlide.className = 'displayed';
 549                                         this.image.parentNode.className = '';
 550                                         this.selectedSlideInSelection = false;
 551                                 }
 552                                 break;
 553
 554                         case 'show_buyable':
 555                                 disableDefault(evt);
 556                                 disablePropagation(evt);
 557                                 button = target;
 558                                 link = button.parentNode;
 559                                 link.blur();
 560                                 var slide = this.cartSlide;
 561                                 slide.innerHTML = '';
 562                                 slide.style.visibility = 'visible';
 563                                 var cw = new CartWidget(slide, link.href);
 564                                 cw.onCancel = function() {
 565                                         CartWidget.prototype.onCancel.apply(this);
 566                                         slide.style.visibility = 'hidden';
 567                                 };
 568                                 cw.onAfterConfirm = function() {
 569                                         slide.style.visibility = 'hidden';
 570                                 };
 571                                 break;
 572
 573
 574
 575
 576                         /*
 577                         case 'edit_metadata' :
 578                                 disableDefault(evt);
 579                                 disablePropagation(evt);
 580                                 target.blur();
 581                                 if (this.viewMode === 'full') {
 582                                         this.mosaique.unload();
 583                                         this.mosaique = null;
 584                                         this.viewMode = 'medium';
 585                                         return;
 586                                 }
 587                                 var fi = new FragmentImporter(absolute_url());
 588                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 589                                 break;
 590                         */
 591                 }
 592         }
 593 };
 594
 595
 596 if(browser.isDOM2Event) {
 597         if (browser.isAppleWebKit) {
 598                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 599                         disableDefault(evt);
 600                         var pos = this.getSliderPosition();
 601                         pos.x -= evt.wheelDelta / 40;
 602                         this.setSliderPosition(pos);
 603                 };
 604         }
 605         else {
 606                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 607                         disableDefault(evt);
 608                         var pos = this.getSliderPosition();
 609                         pos.x += evt.detail * 3;
 610                         this.setSliderPosition(pos);
 611                 };
 612         }
 613 }
 614 else if (browser.isIE6up) {
 615         FilmSlider.prototype.mouseWheelHandler = function() {
 616                 var evt = window.event;
 617                 evt.returnValue = false;
 618                 var pos = this.getSliderPosition();
 619                 pos.x -= evt.wheelDelta / 40;
 620                 this.setSliderPosition(pos);
 621         };
 622 }
 623
 624 FilmSlider.prototype.touchStartHandler = function(evt) {
 625         this.filmStartX = parseInt(this.film.style.left, 10);
 626         this.touchStartX = evt.changedTouches[0].screenX;
 627         this.touchStartTime = (new Date()).getTime();
 628 };
 629
 630 FilmSlider.prototype.touchMoveHandler = function(evt) {
 631         disableDefault(evt);
 632         var delta = this.touchStartX - evt.changedTouches[0].screenX;
 633         var posX = this.filmStartX - delta;
 634         this.setFilmPosition(posX);
 635         this.lastMoveTime = (new Date()).getTime();
 636 };
 637
 638 FilmSlider.prototype.touchEndHandler = function(evt) {
 639         var x = evt.changedTouches[0].screenX;
 640         var delta = x - this.touchStartX;
 641         if (delta) {
 642                 disableDefault(evt);
 643                 var now = (new Date()).getTime();
 644                 if (now - this.lastMoveTime < 100) {
 645                         // au delà de 100 ms de maintient, on annule l'inertie
 646                         var speed = delta / (now - this.touchStartTime);
 647                         var x0 = parseInt(this.film.style.left, 10);
 648                         var t0 = (new Date()).getTime();
 649                         var d = 500; // milisecondes
 650                         delta = 0;
 651                         var dt = 25;
 652                         var self = this;
 653
 654                         var animate = function() {
 655                                 // inertie
 656                                 var t = (new Date()).getTime() - t0;
 657                                 if (t < d) {
 658                                         setTimeout(animate, dt);
 659                                         delta = delta + (1-t/d) * speed * dt; // décelleration linéaire
 660                                         self.setFilmPosition(x0 + delta);
 661                                 }
 662                         };
 663                         animate();
 664                 }
 665         }
 666         this.touchStartX = undefined;
 667 };
 668
 669
 670 FilmSlider.prototype.keyDownHandler = function(evt) {
 671         evt = getEventObject(evt);
 672         switch (evt.keyCode) {
 673                 case keyLeft :
 674                         this.loadSibling(true);
 675                         break;
 676                 case keyRight :
 677                         this.loadSibling(false);
 678                         break;
 679                 default:
 680                         return;
 681         }
 682 };
 683
 684
 685 FilmSlider.prototype.keyPressHandler = function(evt) {
 686         var target = getTargetedObject(evt);
 687         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') { return; }
 688         evt = getEventObject(evt);
 689         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 690         switch(charPress) {
 691                 case 'f':
 692                 case 'F':
 693                         raiseMouseEvent(this.buttons.full_screen, 'click');
 694                         break;
 695         }
 696 };
 697
 698 FilmSlider.prototype.populateViewer = function(req) {
 699         var elements = req.responseXML.documentElement.childNodes;
 700         var i;
 701         for(i=0 ; i < elements.length ; i++ ) {
 702                 element = elements[i];
 703                 switch (element.nodeName) {
 704                         case 'fragment' :
 705                                 var dest = document.getElementById(element.getAttribute('id'));
 706                                 if (dest) { dest.innerHTML = element.firstChild.nodeValue; }
 707                                 break;
 708                         case 'imageattributes' :
 709                                 var link = this.buttons.back_to_portfolio.parentNode;
 710                                 link.href = element.getAttribute('back_to_context_url');
 711                                 link = this.buttons.show_buyable.parentNode;
 712                                 var buyable = element.getAttribute('buyable');
 713                                 if(buyable === 'True') { link.className = null; }
 714                                 else if(buyable === 'False') { link.className = 'hidden'; }
 715                                 this.image.alt = element.getAttribute('alt');
 716                                 this.updateBreadcrumbs(element.getAttribute('last_bc_url'),
 717                                                                            element.getAttribute('img_id'));
 718                                 break;
 719                 }
 720         }
 721 };
 722
 723 FilmSlider.prototype.refreshImage = function() {
 724         this.image.style.visibility = 'hidden';
 725         this.image.src = this.pendingImage.src;
 726         this.image.width = this.pendingImage.width;
 727         this.image.height = this.pendingImage.height;
 728         this.image.style.visibility = 'visible';
 729         if (this.selectedSlideInSelection) { this.image.parentNode.className = 'selected'; }
 730         else { this.image.parentNode.className = ''; }
 731 };
 732
 733 FilmSlider.prototype.updateBreadcrumbs = function(url, title) {
 734         if (this.hasBreadcrumbs) {
 735                 this.lastBCElement.href = url;
 736                 this.lastBCElement.innerHTML = title;
 737         }
 738 };
 739
 740 FilmSlider.prototype.startThumbnailsLoadQueue = function(evt) {
 741         var thumbnails = this.film.getElementsByTagName('img');
 742         if (thumbnails.length === 1) { return; }
 743         this.thumbnailsLoadingOrder = [];
 744         var leftSize = this.center;
 745         var rightSize = thumbnails.length - this.center - 1;
 746         var i;
 747         for (i=1 ; i<=Math.min(leftSize, rightSize) ; i++) {
 748                 this.thumbnailsLoadingOrder.push(thumbnails[this.center + i]);
 749                 this.thumbnailsLoadingOrder.push(thumbnails[this.center - i]);
 750         }
 751         if (leftSize > rightSize) {
 752                 for (i = this.center - rightSize - 1 ; i >= 0 ; i--) {
 753                         console.log(i);
 754                         this.thumbnailsLoadingOrder.push(thumbnails[i]);
 755                 }
 756         }
 757         else if (leftSize < rightSize) {
 758                 for (i = this.center + leftSize ; i < thumbnails.length ; i++) {
 759                         this.thumbnailsLoadingOrder.push(thumbnails[i]);
 760                 }
 761         }
 762         var next = this.thumbnailsLoadingOrder.shift();
 763         var self = this;
 764         addListener(next, 'load', function(evt){self._loadNextThumb(evt);});
 765         next.src = this.translateImgUrl(next.parentNode.href) + '/getThumbnail';
 766 };
 767
 768 FilmSlider.prototype._loadNextThumb = function(evt) {
 769         var next = this.thumbnailsLoadingOrder.shift();
 770         if (!next) {return;}
 771         var self = this;
 772         addListener(next, 'load', function(evt){self._loadNextThumb(evt);});
 773         next.src = this.translateImgUrl(next.parentNode.href) + '/getThumbnail';
 774 };
 775
 776
 777 FilmSlider.prototype.startSlideShow = function() {
 778         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 779         return this.slideShowSlide.href;
 780 };
 781
 782 FilmSlider.prototype.slideShowNext = function() {
 783         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 784         if (nextSlide && nextSlide.nodeType===3) { nextSlide = nextSlide.nextSibling; }
 785
 786         if (nextSlide) {
 787                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 788                 this.pendingSlideShowSlide = nextSlide;
 789                 return this.pendingSlideShowSlide.href;
 790         }
 791         else {
 792                 var row = this.slideShowSlide.parentNode.parentNode;
 793                 var first = row.firstChild;
 794                 if (first.nodeType===3) { first = first.nextSibling; }
 795                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 796                 return this.pendingSlideShowSlide.href;
 797         }
 798 };
 799
 800 FilmSlider.prototype.slideShowPrevious = function() {
 801         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 802         if (previousSlide && previousSlide.nodeType===3) { previousSlide = previousSlide.previousSibling; }
 803
 804         if (previousSlide) {
 805                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 806                 this.pendingSlideShowSlide = previousSlide;
 807                 return this.pendingSlideShowSlide.href;
 808         }
 809         else {
 810                 var row = this.slideShowSlide.parentNode.parentNode;
 811                 var last = row.lastChild;
 812                 if (last.nodeType===3) { last = last.previousSibling; }
 813                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 814                 return this.pendingSlideShowSlide.href;
 815         }
 816 };
 817
 818 FilmSlider.prototype.slideShowImageLoaded = function() {
 819         this.slideShowSlide = this.pendingSlideShowSlide;
 820 };
 821
 822 FilmSlider.prototype.stopSlideShow = function() {
 823         raiseMouseEvent(this.slideShowSlide, 'click');
 824         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'), 10);
 825         this.centerSlide(index);
 826 };
 827
 828
 829 /* UTILS */
 830 function Point(x, y) {
 831         this.x = Math.round(x);
 832         this.y = Math.round(y);
 833 }
 834 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 835 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 836 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k); };
 837 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 838
 839 }());