skins/photo_film_viewer.js

   1 /*
   2 * © 2008 Benoît Pin – Centre de recherche en informatique – École des mines de Paris
   3 * http://plinn.org
   4 * Licence Creative Commons http://creativecommons.org/licenses/by-nc/2.0/
   5 *
   6 *
   7 */
   8
   9 var FilmSlider;
  10
  11 (function(){
  12
  13 var keyLeft = 37, keyRight = 39;
  14 var isTextMime = /^text\/.+/i;
  15 var isAddToSelection = /.*\/add_to_selection$/;
  16 var imgRequestedSize = /size=(\d+)/;
  17 var DEFAULT_IMAGE_SIZES = [500, 600, 800];
  18
  19 FilmSlider = function(filmBar, slider, ctxInfos, image, toolbar, breadcrumbs) {
  20         var thisSlider = this;
  21         this.filmBar = filmBar;
  22         var film = filmBar.firstChild;
  23         if (film.nodeType == 3)
  24                 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 = new Array();
  38         this.toolbar = toolbar;
  39         var bcElements = breadcrumbs.getElementsByTagName('a');
  40         this.lastBCElement = bcElements[bcElements.length-1];
  41         var imgSrcParts = image.src.split('/');
  42         this.lastBCElement.innerHTML = imgSrcParts[imgSrcParts.length-2];
  43
  44         var buttons = toolbar.getElementsByTagName('img');
  45         var b, name;
  46         for (var i=0 ; i<buttons.length ; i++) {
  47                 b = buttons[i];
  48                 name = b.getAttribute('name');
  49                 if (name)
  50                         this.buttons[name] = b;
  51         }
  52
  53         this.pendingImage = new Image();
  54         this.pendingImage.onload = function() {
  55                 thisSlider.refreshImage();
  56         };
  57         this.initialized = false;
  58
  59         with(this.slider.style) {
  60                 left='0';
  61                 top='0';
  62         }
  63         with(this.film.style) {
  64                 left='0';
  65                 top='0';
  66         }
  67
  68         this.filmLength = ctxInfos.filmLength;
  69         this.center = ctxInfos.center;
  70         this.slideSize = ctxInfos.slideSize;
  71         this.ctxUrlTranslation = ctxInfos.ctxUrlTranslation;
  72
  73         this.ddHandlers = {'down' : function(evt){thisSlider.mouseDownHandler(evt);},
  74                                            'move' : function(evt){thisSlider.mouseMoveHandler(evt);},
  75                                            'up' :   function(evt){thisSlider.mouseUpHandler(evt);},
  76                                            'out' :  function(evt){thisSlider.mouseOutHandler(evt);}
  77                                           };
  78
  79         this.resizeSlider();
  80         this.addEventListeners()
  81 };
  82
  83
  84 FilmSlider.prototype.resizeSlider = function(evt) {
  85         var filmBarWidth = getObjectWidth(this.filmBar);
  86         if (!filmBarWidth){
  87                 var thisSlider = this;
  88                 addListener(window, 'load', function(evt){thisSlider.resizeSlider(evt);});
  89                 return;
  90         }
  91
  92         var filmWidth = this.slideSize * this.filmLength;
  93         var sliderRatio = this.sliderRatio =  filmBarWidth / filmWidth;
  94         var sliderWidth = filmBarWidth * sliderRatio;
  95         this.rail.style.width = filmBarWidth + 'px';
  96         this.rail.style.display = 'block';
  97         this.rail.style.visibility = 'visible';
  98         if (sliderRatio < 1) {
  99                 this.slider.style.width = Math.round(sliderWidth) + 'px';
 100                 this.slider.style.visibility = 'visible';
 101         }
 102         else {
 103                 this.slider.style.visibility = 'hidden';
 104         }
 105
 106         this.winSize = {'width'  : getWindowWidth(),
 107                                         'height' : getWindowHeight()};
 108         this.maxRightPosition = filmBarWidth - sliderWidth
 109         this.sliderSpeedRatio = - (filmBarWidth - sliderWidth) / (filmWidth - filmBarWidth);
 110         if (!this.initialized) {
 111                 this.centerSlide(this.center);
 112                 this.selectedSlide = this.filmBar.getElementsByTagName('img')[this.center].parentNode;
 113                 this.initialized = true;
 114         }
 115 };
 116
 117 FilmSlider.prototype.fitToScreen = function(evt) {
 118         this._fitToScreen();
 119         var thisSlider = this;
 120         addListener(window, 'resize', function(evt){thisSlider._fitToScreen();});
 121 };
 122
 123 FilmSlider.prototype._fitToScreen = function(evt) {
 124         var wh = getWindowHeight();
 125         var rb = getObjectTop(this.rail) + getObjectHeight(this.rail); // rail bottom
 126         var delta = wh - rb
 127         var sh = getObjectHeight(this.stretchable);
 128         var newSize = sh + delta;
 129         this.stretchable.style.height = newSize + 'px';
 130
 131         var ratio = this.image.height / this.image.width;
 132         var bestFitSize = this.getBestFitSize(ratio);
 133         var currentSize = parseInt(imgRequestedSize.exec(this.image.src)[1]);
 134         if (currentSize != bestFitSize) {
 135                 var src = this.image.src.replace(imgRequestedSize, 'size=' + bestFitSize);
 136                 this.pendingImage.src = src;
 137         }
 138 };
 139
 140 FilmSlider.prototype.getBestFitSize = function(ratio) {
 141         var fw = getObjectWidth(this.stretchable) - 1;
 142         var fh = getObjectHeight(this.stretchable) - 1;
 143
 144         var i, irw, irh;
 145         if (ratio < 1) {
 146                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 147                         irw = DEFAULT_IMAGE_SIZES[i];
 148                         irh = irw * ratio;
 149                         if (irw <= fw && irh <= fh)
 150                                 break;
 151                 }
 152         }
 153         else {
 154                 for (i=DEFAULT_IMAGE_SIZES.length -1 ; i>0 ; i--) {
 155                         irh = DEFAULT_IMAGE_SIZES[i];
 156                         irw = irh / ratio;
 157                         if (irw <= fw && irh <= fh)
 158                                 break;
 159                 }
 160         }
 161         return DEFAULT_IMAGE_SIZES[i];
 162 };
 163
 164 FilmSlider.prototype.centerSlide = function(slideIndex) {
 165         if (this.sliderRatio > 1)
 166                 return;
 167         var filmBarWidth = getObjectWidth(this.filmBar);
 168         var x = slideIndex * this.slideSize
 169         x = x - (filmBarWidth - this.slideSize) / 2.0;
 170         x = x * this.sliderSpeedRatio;
 171         var p = new Point( -x, 0 )
 172         this.setSliderPosition(p);
 173 };
 174
 175 FilmSlider.prototype.setSliderPosition = function(point) {
 176         if(point.x < 0)
 177                 point.x = 0;
 178         if (point.x > this.maxRightPosition)
 179                 point.x = this.maxRightPosition;
 180         this.slider.style.left = point.x + 'px';
 181         this.setFilmPosition(point);
 182 };
 183
 184 FilmSlider.prototype.setFilmPosition = function(point) {
 185         this.film.style.left = point.x / this.sliderSpeedRatio + 'px';
 186 };
 187
 188 FilmSlider.prototype.getSliderPosition = function() {
 189         var x = parseInt(this.slider.style.left);
 190         var y = parseInt(this.slider.style.top);
 191         var p = new Point(x, y);
 192         return p;
 193 };
 194
 195 FilmSlider.prototype.getFilmPosition = function() {
 196         var x = parseInt(this.film.style.left);
 197         var y = parseInt(this.film.style.top);
 198         var p = new Point(x, y);
 199         return p;
 200 };
 201
 202 FilmSlider.prototype.loadSibling = function(previous) {
 203         var slide = null;
 204         if (previous) {
 205                 slide = this.selectedSlide.parentNode.previousSibling;
 206                 if (slide && slide.nodeType==3)
 207                         slide = slide.previousSibling;
 208         }
 209         else {
 210                 slide = this.selectedSlide.parentNode.nextSibling;
 211                 if (slide && slide.nodeType==3)
 212                         slide = slide.nextSibling;
 213         }
 214
 215         if (!slide)
 216                 return;
 217         else {
 218                 var target = slide.getElementsByTagName('a')[0];
 219                 raiseMouseEvent(target, 'click');
 220                 var index = parseInt(target.getAttribute('portfolio:position'));
 221                 this.centerSlide(index);
 222         }
 223 };
 224
 225 FilmSlider.prototype.addEventListeners = function() {
 226         var thisSlider = this;
 227         addListener(window, 'resize', function(evt){thisSlider.resizeSlider(evt);});
 228         addListener(this.filmBar, 'click', function(evt){thisSlider.thumbnailClickHandler(evt);});
 229         addListener(this.toolbar, 'click', function(evt){thisSlider.toolbarClickHandler(evt);});
 230         addListener(window, 'load', function(evt){thisSlider.fitToScreen(evt);});
 231
 232         // dd listeners
 233         addListener(this.slider, 'mousedown', this.ddHandlers['down']);
 234         if(browser.isDOM2Event){
 235                 if (browser.isAppleWebKit) {
 236                         this.filmBar.addEventListener('mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);}, false);
 237                 }
 238                 else {
 239                         addListener(this.filmBar, 'DOMMouseScroll', function(evt){thisSlider.mouseWheelHandler(evt);});
 240                 }
 241         }
 242         else if (browser.isIE6up) {
 243                 addListener(this.filmBar, 'mousewheel', function(evt){thisSlider.mouseWheelHandler(evt);});
 244         }
 245
 246         addListener(document, 'keydown', function(evt){thisSlider.keyDownHandler(evt);});
 247         addListener(document, 'keypress', function(evt){thisSlider.keyPressHandler(evt);});
 248 };
 249
 250
 251 FilmSlider.prototype.mouseDownHandler = function(evt) {
 252         this.initialClickPoint = new Point(evt.clientX, evt.clientY);
 253         this.initialPosition = this.getSliderPosition();
 254         this.dragInProgress = true;
 255         addListener(document, 'mousemove', this.ddHandlers['move']);
 256         addListener(document, 'mouseup', this.ddHandlers['up']);
 257         addListener(document.body, 'mouseout', this.ddHandlers['out'])
 258
 259 };
 260
 261
 262 FilmSlider.prototype.mouseMoveHandler = function(evt) {
 263         if(!this.dragInProgress)
 264                 return;
 265
 266         clearSelection();
 267         evt = getEventObject(evt);
 268         var currentPoint = new Point(evt.clientX, evt.clientY);
 269         var displacement = currentPoint.diff(this.initialClickPoint);
 270         this.setSliderPosition(this.initialPosition.add(displacement));
 271 };
 272
 273 FilmSlider.prototype.mouseUpHandler = function(evt) {
 274         this.dragInProgress = false;
 275         evt = getEventObject(evt);
 276         this.mouseMoveHandler(evt);
 277 };
 278
 279
 280 FilmSlider.prototype.mouseOutHandler = function(evt) {
 281         evt = getEventObject(evt);
 282         var x = evt.clientX;
 283         var y = evt.clientY;
 284         if (x < 0 ||
 285                 x > this.winSize['width'] ||
 286                 y < 0 ||
 287                 y > this.winSize['height']
 288                 ){
 289                 this.mouseUpHandler(evt);
 290         }
 291 };
 292
 293 FilmSlider.prototype.thumbnailClickHandler = function(evt) {
 294         var target = getTargetedObject(evt);
 295         while (target.tagName != 'A' && target != this.filmBar)
 296                 target = target.parentNode;
 297         if (target.tagName != 'A')
 298                 return;
 299         else {
 300                 if (this.viewMode == 'full') {
 301                         this.mosaique.unload();
 302                         this.mosaique = null;
 303                         this.viewMode = 'medium';
 304                 }
 305                 disableDefault(evt);
 306                 disablePropagation(evt);
 307                 target.blur();
 308         history.pushState(target.href, '', target.href);
 309
 310                 var imgBaseUrl = target.href;
 311                 var canonicalImgUrl;
 312                 if (this.ctxUrlTranslation[0])
 313                         canonicalImgUrl = imgBaseUrl.replace(this.ctxUrlTranslation[0],
 314                                                                                                  this.ctxUrlTranslation[1]);
 315                 else
 316                         canonicalImgUrl = imgBaseUrl;
 317
 318                 var ajaxUrl = imgBaseUrl + '/photo_view_ajax';
 319                 var thisFS = this;
 320
 321                 //this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=600';
 322                 var thumbnail = target.getElementsByTagName('IMG')[0];
 323                 var bestFitSize = this.getBestFitSize(thumbnail.height/thumbnail.width);
 324                 this.pendingImage.src = canonicalImgUrl + '/getResizedImage?size=' + bestFitSize;
 325
 326                 // update buttons
 327                 var fullScreenLink = this.buttons['full_screen'].parentNode;
 328                 fullScreenLink.href = canonicalImgUrl + '/zoom_view';
 329
 330                 var toggleSelectionBtn = this.buttons['toggle_selection'];
 331                 var toggleSelectionLink = toggleSelectionBtn.parentNode;
 332                 this.selectedSlideInSelection = (target.className=='selected');
 333                 if (this.selectedSlideInSelection) {
 334                         toggleSelectionBtn.src = portal_url() + '/unselect_flag_btn.gif';
 335                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Retirer de la sélection';
 336                         toggleSelectionLink.href = canonicalImgUrl + '/remove_to_selection';
 337                 }
 338                 else {
 339                         toggleSelectionBtn.src = portal_url() + '/select_flag_btn.gif';
 340                         toggleSelectionBtn.alt = toggleSelectionLink.title = 'Ajouter à la sélection';
 341                         toggleSelectionLink.href = canonicalImgUrl + '/add_to_selection';
 342                 }
 343
 344                 var showBuyableButtonLink = this.buttons['show_buyable'].parentNode;
 345                 showBuyableButtonLink.href = canonicalImgUrl + '/get_slide_buyable_items';
 346                 this.cartSlide.innerHTML = '';
 347                 this.cartSlide.style.visibility='hidden';
 348
 349
 350                 var metadataButton = this.buttons['edit_metadata']
 351                 if (metadataButton) {
 352                         var metadataEditLink = metadataButton.parentNode;
 353                         metadataEditLink.href = canonicalImgUrl + '/photo_edit_form'
 354                 }
 355
 356
 357                 var req = new XMLHttpRequest();
 358                 req.onreadystatechange = function() {
 359                         switch (req.readyState) {
 360                                 case 1 :
 361                                         showProgressImage();
 362                                         break;
 363                                 case 2 :
 364                                         try {
 365                                                 if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
 366                                                         req.onreadystatechange = null;
 367                                                         req.abort();
 368                                                         hideProgressImage();
 369                                                         window.location.href = thisFS._fallBackUrl;
 370                                                 }
 371                                         }
 372                                         catch(e){}
 373                                         break;
 374                                 case 4 :
 375                                         hideProgressImage();
 376                                         if (req.status == '200')
 377                                                 thisFS.populateViewer(req);
 378                                         else
 379                                                 //window.location.href = target.href;
 380                                                 console.error(ajaxUrl);
 381
 382                         };
 383                 };
 384
 385                 req.open("GET", ajaxUrl, true);
 386                 req.send(null);
 387
 388                 // update old displayed slide className
 389                 var className = this.selectedSlide.className;
 390                 var classes = className.split(' ');
 391                 var newClasses = new Array();
 392                 var name;
 393
 394                 for (i in classes) {
 395                         name = classes[i];
 396                         if (name == 'displayed')
 397                                 continue;
 398                         else
 399                                 newClasses.push(name);
 400                 }
 401
 402                 this.selectedSlide.className = newClasses.join(' ')
 403
 404                 // hightlight new displayed slide
 405                 this.selectedSlide = target;
 406                 className = this.selectedSlide.className;
 407                 classes = className.split(' ');
 408                 classes.push('displayed');
 409                 this.selectedSlide.className = classes.join(' ');
 410         }
 411 };
 412
 413 FilmSlider.prototype.toolbarClickHandler = function(evt) {
 414         var target = getTargetedObject(evt);
 415         if(target.tagName == 'IMG' && target.getAttribute('name')){
 416                 switch(target.getAttribute('name')) {
 417                         case 'previous' :
 418                                 disableDefault(evt);
 419                                 disablePropagation(evt);
 420                                 var button = target;
 421                                 var link = button.parentNode;
 422                                 link.blur();
 423                                 this.loadSibling(true);
 424                                 break;
 425                         case 'next' :
 426                                 disableDefault(evt);
 427                                 disablePropagation(evt);
 428                                 var button = target;
 429                                 var link = button.parentNode;
 430                                 link.blur();
 431                                 this.loadSibling(false);
 432                                 break;
 433                         case 'full_screen':
 434                                 disableDefault(evt);
 435                                 disablePropagation(evt);
 436                                 target.parentNode.blur();
 437                                 if (this.viewMode == 'full') {
 438                                         this.mosaique.unload();
 439                                         this.mosaique = null;
 440                                         this.viewMode = 'medium';
 441                                         return;
 442                                 }
 443                                 var main = document.getElementById('photo_viewer');
 444                                 var url = target.parentNode.href;
 445                                 url = url.substring(0, url.length - '/zoom_view'.length);
 446                                 var margins = {'top':0, 'right':-1, 'bottom':0, 'left':0};
 447                                 this.mosaique = new Mosaique(main, url, margins);
 448                                 this.viewMode = 'full';
 449                                 break;
 450
 451                         case 'toggle_selection':
 452                                 disableDefault(evt);
 453                                 disablePropagation(evt);
 454                                 var button = target;
 455                                 var link = button.parentNode;
 456                                 link.blur();
 457
 458                                 var req = new XMLHttpRequest();
 459                                 var url = link.href;
 460                                 req.open("POST", url, true);
 461                                 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
 462                                 req.send("ajax=1");
 463
 464                                 // toggle button
 465                                 var parts = url.split('/');
 466                                 var canonicalImgUrl = parts.slice(0, parts.length-1).join('/');
 467
 468                                 if (isAddToSelection.test(url)) {
 469                                         button.src = portal_url() + '/unselect_flag_btn.gif';
 470                                         button.alt = link.title = 'Retirer de la sélection';
 471                                         link.href = canonicalImgUrl + '/remove_to_selection';
 472                                         this.selectedSlide.className = 'selected displayed';
 473                                         this.image.parentNode.className = 'selected';
 474                                         this.selectedSlideInSelection = true;
 475                                 }
 476                                 else {
 477                                         button.src = portal_url() + '/select_flag_btn.gif';
 478                                         button.alt = link.title = 'Ajouter à la sélection';
 479                                         link.href = canonicalImgUrl + '/add_to_selection';
 480                                         this.selectedSlide.className = 'displayed';
 481                                         this.image.parentNode.className = '';
 482                                         this.selectedSlideInSelection = false;
 483                                 }
 484                                 break;
 485
 486                         case 'show_buyable':
 487                                 disableDefault(evt);
 488                                 disablePropagation(evt);
 489                                 var button = target;
 490                                 var link = button.parentNode;
 491                                 link.blur();
 492                                 var slide = this.cartSlide;
 493                                 slide.innerHTML = '';
 494                                 slide.style.visibility = 'visible';
 495                                 var cw = new CartWidget(slide, link.href);
 496                                 cw.onCancel = function() {
 497                                         CartWidget.prototype.onCancel.apply(this);
 498                                         slide.style.visibility = 'hidden';
 499                                 };
 500                                 cw.onAfterConfirm = function() {
 501                                         slide.style.visibility = 'hidden';
 502                                 };
 503                                 break;
 504
 505
 506
 507
 508                         /*
 509                         case 'edit_metadata' :
 510                                 disableDefault(evt);
 511                                 disablePropagation(evt);
 512                                 target.blur();
 513                                 if (this.viewMode == 'full') {
 514                                         this.mosaique.unload();
 515                                         this.mosaique = null;
 516                                         this.viewMode = 'medium';
 517                                         return;
 518                                 }
 519                                 var fi = new FragmentImporter(absolute_url());
 520                                 fi.useMacro('metadata_edit_form_macros', 'iptc', 'image_metadata');
 521                                 break;
 522                         */
 523                 }
 524         }
 525 };
 526
 527
 528 if(browser.isDOM2Event){
 529         if (browser.isAppleWebKit) {
 530                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 531                         disableDefault(evt);
 532                         var pos = this.getSliderPosition();
 533                         pos.x -= evt.wheelDelta / 40;
 534                         this.setSliderPosition(pos);
 535                 };
 536         }
 537         else {
 538                 FilmSlider.prototype.mouseWheelHandler = function(evt) {
 539                         disableDefault(evt);
 540                         var pos = this.getSliderPosition();
 541                         pos.x += evt.detail * 3;
 542                         this.setSliderPosition(pos);
 543                 };
 544         }
 545 }
 546 else if (browser.isIE6up) {
 547         FilmSlider.prototype.mouseWheelHandler = function() {
 548                 var evt = window.event;
 549                 evt.returnValue = false;
 550                 var pos = this.getSliderPosition();
 551                 pos.x -= evt.wheelDelta / 40;
 552                 this.setSliderPosition(pos);
 553         };
 554 }
 555
 556 FilmSlider.prototype.keyDownHandler = function(evt) {
 557         var evt = getEventObject(evt);
 558         switch (evt.keyCode) {
 559                 case keyLeft :
 560                         this.loadSibling(true);
 561                         break;
 562                 case keyRight :
 563                         this.loadSibling(false);
 564                         break;
 565                 default:
 566                         return;
 567         }
 568 };
 569
 570
 571 FilmSlider.prototype.keyPressHandler = function(evt) {
 572         var target = getTargetedObject(evt);
 573         if (target.tagName == 'INPUT' || target.tagName== 'TEXTAREA')
 574                 return;
 575         var evt = getEventObject(evt);
 576         var charPress = String.fromCharCode((evt.keyCode) ? evt.keyCode : evt.which);
 577         switch(charPress) {
 578                 case 'f':
 579                 case 'F':
 580                         raiseMouseEvent(this.buttons['full_screen'], 'click');
 581                         break;
 582         }
 583 };
 584
 585 FilmSlider.prototype.populateViewer = function(req) {
 586         var elements = req.responseXML.documentElement.childNodes;
 587         for(var i=0 ; i < elements.length ; i++ ) {
 588                 element = elements[i];
 589                 switch (element.nodeName) {
 590                         case 'fragment' :
 591                                 var dest = document.getElementById(element.getAttribute('id'));
 592                                 dest.innerHTML = element.firstChild.nodeValue;
 593                                 break;
 594                         case 'imageattributes' :
 595                                 var link = this.buttons['back_to_portfolio'].parentNode;
 596                                 link.href = element.getAttribute('backToContextUrl');
 597                                 link = this.buttons['show_buyable'].parentNode;
 598                                 var buyable = element.getAttribute('buyable');
 599                                 if(buyable == 'True')
 600                                         link.className = null;
 601                                 else if(buyable == 'False')
 602                                         link.className = 'hidden';
 603                                 this.image.alt = element.getAttribute('alt');
 604                                 this.lastBCElement.href = element.getAttribute('lastBcUrl');
 605                                 this.lastBCElement.innerHTML = element.getAttribute('img_id');
 606                                 break;
 607                 }
 608         }
 609 };
 610
 611 FilmSlider.prototype.refreshImage = function() {
 612         this.image.style.visibility = 'hidden';
 613         this.image.src = this.pendingImage.src;
 614         this.image.width = this.pendingImage.width;
 615         this.image.height = this.pendingImage.height;
 616         this.image.style.visibility = 'visible';
 617         if (this.selectedSlideInSelection)
 618                 this.image.parentNode.className = 'selected';
 619         else
 620                 this.image.parentNode.className = '';
 621 };
 622
 623 FilmSlider.prototype.startSlideShow = function() {
 624         this.slideShowSlide = this.pendingSlideShowSlide = this.selectedSlide;
 625         return this.slideShowSlide.href;
 626 };
 627
 628 FilmSlider.prototype.slideShowNext = function() {
 629         var nextSlide = this.slideShowSlide.parentNode.nextSibling;
 630         if (nextSlide && nextSlide.nodeType==3)
 631                 nextSlide = nextSlide.nextSibling;
 632
 633         if (nextSlide) {
 634                 nextSlide = nextSlide.getElementsByTagName('a')[0];
 635                 this.pendingSlideShowSlide = nextSlide;
 636                 return this.pendingSlideShowSlide.href;
 637         }
 638         else {
 639                 var row = this.slideShowSlide.parentNode.parentNode;
 640                 var first = row.firstChild;
 641                 if (first.nodeType==3)
 642                         first = first.nextSibling;
 643                 this.pendingSlideShowSlide = first.getElementsByTagName('a')[0];
 644                 return this.pendingSlideShowSlide.href;
 645         }
 646 };
 647
 648 FilmSlider.prototype.slideShowPrevious = function() {
 649         var previousSlide = this.slideShowSlide.parentNode.previousSibling;
 650         if (previousSlide && previousSlide.nodeType==3)
 651                 previousSlide = previousSlide.previousSibling;
 652
 653         if (previousSlide) {
 654                 previousSlide = previousSlide.getElementsByTagName('a')[0];
 655                 this.pendingSlideShowSlide = previousSlide;
 656                 return this.pendingSlideShowSlide.href;
 657         }
 658         else {
 659                 var row = this.slideShowSlide.parentNode.parentNode;
 660                 var last = row.lastChild;
 661                 if (last.nodeType==3)
 662                         last = last.previousSibling;
 663                 this.pendingSlideShowSlide = last.getElementsByTagName('a')[0];
 664                 return this.pendingSlideShowSlide.href;
 665         }
 666 };
 667
 668 FilmSlider.prototype.slideShowImageLoaded = function() {
 669         this.slideShowSlide = this.pendingSlideShowSlide;
 670 };
 671
 672 FilmSlider.prototype.stopSlideShow = function() {
 673         raiseMouseEvent(this.slideShowSlide, 'click');
 674         var index = parseInt(this.selectedSlide.getAttribute('portfolio:position'));
 675         this.centerSlide(index);
 676 };
 677
 678
 679 /* UTILS */
 680 function Point(x, y) {
 681         this.x = Math.round(x);
 682         this.y = Math.round(y);
 683 }
 684 Point.prototype.diff = function(point) { return new Point(this.x - point.x, this.y - point.y); };
 685 Point.prototype.add = function(point) { return new Point(this.x + point.x, this.y + point.y); };
 686 Point.prototype.mul = function(k) { return new Point(this.x * k, this.y *k)};
 687 Point.prototype.toString = function() { return "(" + String(this.x) + ", " + String(this.y) + ")"; };
 688
 689 })();