Added lightbox.js for product images

COPYRIGHT

@@ -29,3 +29,4 @@ This project includes the work of others, namely:
 * reportlab, (c) ReportLab Europe Ltd, BSD License
 * django-compressor, (c) Jannis Leidel and contributors, MIT License
 * static3, (c) Roman Mohr and contributors, LGPL License
+* Lightbox, (c) Lokesh Dhakar, MIT License

src/pretix/presale/templates/pretixpresale/event/base.html

@@ -75,5 +75,8 @@
         {% endblocktrans %}
     {% endwith %}
 </footer>
+{% compress js %}
+    <script type="text/javascript" src="{% static "lightbox/js/lightbox.min.js" %}"></script>
+{% endcompress %}
 </body>
 </html>

src/pretix/presale/templates/pretixpresale/event/index.html

@@ -62,9 +62,12 @@
                                 <div class="row-fluid product-row headline">
                                     <div class="col-md-8 col-xs-12">
                                         {% if item.picture %}
-                                            <img src="{{ item.picture|thumbnail_url:'productlist' }}"
+                                            <a href="{{ item.picture.url }}" class="productpicture"
-                                                    class="productpicture"
+                                                    data-title="{{ item.name }}"
-                                                    alt="{{ item.name }}" />
+                                                    data-lightbox="{{ item.identity }}">
+                                                <img src="{{ item.picture|thumbnail_url:'productlist' }}"
+                                                        alt="{{ item.name }}" />
+                                            </a>
                                         {% endif %}
                                         <a href="javascript:void(0);" data-toggle="variations">
                                             <strong>{{ item.name }}</strong>
@@ -118,6 +121,14 @@
                         {% else %}
                             <div class="row-fluid product-row simple">
                                 <div class="col-md-8 col-xs-12">
+                                    {% if item.picture %}
+                                        <a href="{{ item.picture.url }}" class="productpicture"
+                                                data-title="{{ item.name }}"
+                                                data-lightbox="{{ item.identity }}">
+                                            <img src="{{ item.picture|thumbnail_url:'productlist' }}"
+                                                    alt="{{ item.name }}" />
+                                        </a>
+                                    {% endif %}
                                     <strong>{{ item.name }}</strong>
                                     {% if item.short_description %}<p>{{ item.short_description }}</p>{% endif %}
                                 </div>

src/static/lightbox/css/lightbox.css

@@ -0,0 +1,210 @@
+/* Preload images */
+body:after {
+  content: url(../images/close.png) url(../images/loading.gif) url(../images/prev.png) url(../images/next.png);
+  display: none;
+}
+
+.lightboxOverlay {
+  position: absolute;
+  top: 0;
+  left: 0;
+  z-index: 9999;
+  background-color: black;
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80);
+  opacity: 0.8;
+  display: none;
+}
+
+.lightbox {
+  position: absolute;
+  left: 0;
+  width: 100%;
+  z-index: 10000;
+  text-align: center;
+  line-height: 0;
+  font-weight: normal;
+}
+
+.lightbox .lb-image {
+  display: block;
+  height: auto;
+  max-width: inherit;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  -ms-border-radius: 3px;
+  -o-border-radius: 3px;
+  border-radius: 3px;
+}
+
+.lightbox a img {
+  border: none;
+}
+
+.lb-outerContainer {
+  position: relative;
+  background-color: white;
+  *zoom: 1;
+  width: 250px;
+  height: 250px;
+  margin: 0 auto;
+  -webkit-border-radius: 4px;
+  -moz-border-radius: 4px;
+  -ms-border-radius: 4px;
+  -o-border-radius: 4px;
+  border-radius: 4px;
+}
+
+.lb-outerContainer:after {
+  content: "";
+  display: table;
+  clear: both;
+}
+
+.lb-container {
+  padding: 4px;
+}
+
+.lb-loader {
+  position: absolute;
+  top: 43%;
+  left: 0;
+  height: 25%;
+  width: 100%;
+  text-align: center;
+  line-height: 0;
+}
+
+.lb-cancel {
+  display: block;
+  width: 32px;
+  height: 32px;
+  margin: 0 auto;
+  background: url(../images/loading.gif) no-repeat;
+}
+
+.lb-nav {
+  position: absolute;
+  top: 0;
+  left: 0;
+  height: 100%;
+  width: 100%;
+  z-index: 10;
+}
+
+.lb-container > .nav {
+  left: 0;
+}
+
+.lb-nav a {
+  outline: none;
+  background-image: url('data:image/gif;base64,R0lGODlhAQABAPAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==');
+}
+
+.lb-prev, .lb-next {
+  height: 100%;
+  cursor: pointer;
+  display: block;
+}
+
+.lb-nav a.lb-prev {
+  width: 34%;
+  left: 0;
+  float: left;
+  background: url(../images/prev.png) left 48% no-repeat;
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
+  opacity: 0;
+  -webkit-transition: opacity 0.6s;
+  -moz-transition: opacity 0.6s;
+  -o-transition: opacity 0.6s;
+  transition: opacity 0.6s;
+}
+
+.lb-nav a.lb-prev:hover {
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
+  opacity: 1;
+}
+
+.lb-nav a.lb-next {
+  width: 64%;
+  right: 0;
+  float: right;
+  background: url(../images/next.png) right 48% no-repeat;
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
+  opacity: 0;
+  -webkit-transition: opacity 0.6s;
+  -moz-transition: opacity 0.6s;
+  -o-transition: opacity 0.6s;
+  transition: opacity 0.6s;
+}
+
+.lb-nav a.lb-next:hover {
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
+  opacity: 1;
+}
+
+.lb-dataContainer {
+  margin: 0 auto;
+  padding-top: 5px;
+  *zoom: 1;
+  width: 100%;
+  -moz-border-radius-bottomleft: 4px;
+  -webkit-border-bottom-left-radius: 4px;
+  border-bottom-left-radius: 4px;
+  -moz-border-radius-bottomright: 4px;
+  -webkit-border-bottom-right-radius: 4px;
+  border-bottom-right-radius: 4px;
+}
+
+.lb-dataContainer:after {
+  content: "";
+  display: table;
+  clear: both;
+}
+
+.lb-data {
+  padding: 0 4px;
+  color: #ccc;
+}
+
+.lb-data .lb-details {
+  width: 85%;
+  float: left;
+  text-align: left;
+  line-height: 1.1em;
+}
+
+.lb-data .lb-caption {
+  font-size: 13px;
+  font-weight: bold;
+  line-height: 1em;
+}
+
+.lb-data .lb-number {
+  display: block;
+  clear: left;
+  padding-bottom: 1em;
+  font-size: 12px;
+  color: #999999;
+}
+
+.lb-data .lb-close {
+  display: block;
+  float: right;
+  width: 30px;
+  height: 30px;
+  background: url(../images/close.png) top right no-repeat;
+  text-align: right;
+  outline: none;
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=70);
+  opacity: 0.7;
+  -webkit-transition: opacity 0.2s;
+  -moz-transition: opacity 0.2s;
+  -o-transition: opacity 0.2s;
+  transition: opacity 0.2s;
+}
+
+.lb-data .lb-close:hover {
+  cursor: pointer;
+  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
+  opacity: 1;
+}

src/static/lightbox/js/lightbox.js

@@ -0,0 +1,444 @@
+/*!
+ * Lightbox v2.8.1
+ * by Lokesh Dhakar
+ *
+ * More info:
+ * http://lokeshdhakar.com/projects/lightbox2/
+ *
+ * Copyright 2007, 2015 Lokesh Dhakar
+ * Released under the MIT license
+ * https://github.com/lokesh/lightbox2/blob/master/LICENSE
+ */
+
+// Uses Node, AMD or browser globals to create a module.
+(function (root, factory) {
+    if (typeof define === 'function' && define.amd) {
+        // AMD. Register as an anonymous module.
+        define(['jquery'], factory);
+    } else if (typeof exports === 'object') {
+        // Node. Does not work with strict CommonJS, but
+        // only CommonJS-like environments that support module.exports,
+        // like Node.
+        module.exports = factory(require('jquery'));
+    } else {
+        // Browser globals (root is window)
+        root.lightbox = factory(root.jQuery);
+    }
+}(this, function ($) {
+
+  function Lightbox(options) {
+    this.album = [];
+    this.currentImageIndex = void 0;
+    this.init();
+
+    // options
+    this.options = $.extend({}, this.constructor.defaults);
+    this.option(options);
+  }
+
+  // Descriptions of all options available on the demo site:
+  // http://lokeshdhakar.com/projects/lightbox2/index.html#options
+  Lightbox.defaults = {
+    albumLabel: 'Image %1 of %2',
+    alwaysShowNavOnTouchDevices: false,
+    fadeDuration: 500,
+    fitImagesInViewport: true,
+    // maxWidth: 800,
+    // maxHeight: 600,
+    positionFromTop: 50,
+    resizeDuration: 700,
+    showImageNumberLabel: true,
+    wrapAround: false
+  };
+
+  Lightbox.prototype.option = function(options) {
+    $.extend(this.options, options);
+  };
+
+  Lightbox.prototype.imageCountLabel = function(currentImageNum, totalImages) {
+    return this.options.albumLabel.replace(/%1/g, currentImageNum).replace(/%2/g, totalImages);
+  };
+
+  Lightbox.prototype.init = function() {
+    this.enable();
+    this.build();
+  };
+
+  // Loop through anchors and areamaps looking for either data-lightbox attributes or rel attributes
+  // that contain 'lightbox'. When these are clicked, start lightbox.
+  Lightbox.prototype.enable = function() {
+    var self = this;
+    $('body').on('click', 'a[rel^=lightbox], area[rel^=lightbox], a[data-lightbox], area[data-lightbox]', function(event) {
+      self.start($(event.currentTarget));
+      return false;
+    });
+  };
+
+  // Build html for the lightbox and the overlay.
+  // Attach event handlers to the new DOM elements. click click click
+  Lightbox.prototype.build = function() {
+    var self = this;
+    $('<div id="lightboxOverlay" class="lightboxOverlay"></div><div id="lightbox" class="lightbox"><div class="lb-outerContainer"><div class="lb-container"><img class="lb-image" src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" /><div class="lb-nav"><a class="lb-prev" href="" ></a><a class="lb-next" href="" ></a></div><div class="lb-loader"><a class="lb-cancel"></a></div></div></div><div class="lb-dataContainer"><div class="lb-data"><div class="lb-details"><span class="lb-caption"></span><span class="lb-number"></span></div><div class="lb-closeContainer"><a class="lb-close"></a></div></div></div></div>').appendTo($('body'));
+
+    // Cache jQuery objects
+    this.$lightbox       = $('#lightbox');
+    this.$overlay        = $('#lightboxOverlay');
+    this.$outerContainer = this.$lightbox.find('.lb-outerContainer');
+    this.$container      = this.$lightbox.find('.lb-container');
+
+    // Store css values for future lookup
+    this.containerTopPadding = parseInt(this.$container.css('padding-top'), 10);
+    this.containerRightPadding = parseInt(this.$container.css('padding-right'), 10);
+    this.containerBottomPadding = parseInt(this.$container.css('padding-bottom'), 10);
+    this.containerLeftPadding = parseInt(this.$container.css('padding-left'), 10);
+
+    // Attach event handlers to the newly minted DOM elements
+    this.$overlay.hide().on('click', function() {
+      self.end();
+      return false;
+    });
+
+    this.$lightbox.hide().on('click', function(event) {
+      if ($(event.target).attr('id') === 'lightbox') {
+        self.end();
+      }
+      return false;
+    });
+
+    this.$outerContainer.on('click', function(event) {
+      if ($(event.target).attr('id') === 'lightbox') {
+        self.end();
+      }
+      return false;
+    });
+
+    this.$lightbox.find('.lb-prev').on('click', function() {
+      if (self.currentImageIndex === 0) {
+        self.changeImage(self.album.length - 1);
+      } else {
+        self.changeImage(self.currentImageIndex - 1);
+      }
+      return false;
+    });
+
+    this.$lightbox.find('.lb-next').on('click', function() {
+      if (self.currentImageIndex === self.album.length - 1) {
+        self.changeImage(0);
+      } else {
+        self.changeImage(self.currentImageIndex + 1);
+      }
+      return false;
+    });
+
+    this.$lightbox.find('.lb-loader, .lb-close').on('click', function() {
+      self.end();
+      return false;
+    });
+  };
+
+  // Show overlay and lightbox. If the image is part of a set, add siblings to album array.
+  Lightbox.prototype.start = function($link) {
+    var self    = this;
+    var $window = $(window);
+
+    $window.on('resize', $.proxy(this.sizeOverlay, this));
+
+    $('select, object, embed').css({
+      visibility: 'hidden'
+    });
+
+    this.sizeOverlay();
+
+    this.album = [];
+    var imageNumber = 0;
+
+    function addToAlbum($link) {
+      self.album.push({
+        link: $link.attr('href'),
+        title: $link.attr('data-title') || $link.attr('title')
+      });
+    }
+
+    // Support both data-lightbox attribute and rel attribute implementations
+    var dataLightboxValue = $link.attr('data-lightbox');
+    var $links;
+
+    if (dataLightboxValue) {
+      $links = $($link.prop('tagName') + '[data-lightbox="' + dataLightboxValue + '"]');
+      for (var i = 0; i < $links.length; i = ++i) {
+        addToAlbum($($links[i]));
+        if ($links[i] === $link[0]) {
+          imageNumber = i;
+        }
+      }
+    } else {
+      if ($link.attr('rel') === 'lightbox') {
+        // If image is not part of a set
+        addToAlbum($link);
+      } else {
+        // If image is part of a set
+        $links = $($link.prop('tagName') + '[rel="' + $link.attr('rel') + '"]');
+        for (var j = 0; j < $links.length; j = ++j) {
+          addToAlbum($($links[j]));
+          if ($links[j] === $link[0]) {
+            imageNumber = j;
+          }
+        }
+      }
+    }
+
+    // Position Lightbox
+    var top  = $window.scrollTop() + this.options.positionFromTop;
+    var left = $window.scrollLeft();
+    this.$lightbox.css({
+      top: top + 'px',
+      left: left + 'px'
+    }).fadeIn(this.options.fadeDuration);
+
+    this.changeImage(imageNumber);
+  };
+
+  // Hide most UI elements in preparation for the animated resizing of the lightbox.
+  Lightbox.prototype.changeImage = function(imageNumber) {
+    var self = this;
+
+    this.disableKeyboardNav();
+    var $image = this.$lightbox.find('.lb-image');
+
+    this.$overlay.fadeIn(this.options.fadeDuration);
+
+    $('.lb-loader').fadeIn('slow');
+    this.$lightbox.find('.lb-image, .lb-nav, .lb-prev, .lb-next, .lb-dataContainer, .lb-numbers, .lb-caption').hide();
+
+    this.$outerContainer.addClass('animating');
+
+    // When image to show is preloaded, we send the width and height to sizeContainer()
+    var preloader = new Image();
+    preloader.onload = function() {
+      var $preloader;
+      var imageHeight;
+      var imageWidth;
+      var maxImageHeight;
+      var maxImageWidth;
+      var windowHeight;
+      var windowWidth;
+
+      $image.attr('src', self.album[imageNumber].link);
+
+      $preloader = $(preloader);
+
+      $image.width(preloader.width);
+      $image.height(preloader.height);
+
+      if (self.options.fitImagesInViewport) {
+        // Fit image inside the viewport.
+        // Take into account the border around the image and an additional 10px gutter on each side.
+
+        windowWidth    = $(window).width();
+        windowHeight   = $(window).height();
+        maxImageWidth  = windowWidth - self.containerLeftPadding - self.containerRightPadding - 20;
+        maxImageHeight = windowHeight - self.containerTopPadding - self.containerBottomPadding - 120;
+
+        // Check if image size is larger then maxWidth|maxHeight in settings
+        if (self.options.maxWidth && self.options.maxWidth < maxImageWidth) {
+          maxImageWidth = self.options.maxWidth;
+        }
+        if (self.options.maxHeight && self.options.maxHeight < maxImageWidth) {
+          maxImageHeight = self.options.maxHeight;
+        }
+
+        // Is there a fitting issue?
+        if ((preloader.width > maxImageWidth) || (preloader.height > maxImageHeight)) {
+          if ((preloader.width / maxImageWidth) > (preloader.height / maxImageHeight)) {
+            imageWidth  = maxImageWidth;
+            imageHeight = parseInt(preloader.height / (preloader.width / imageWidth), 10);
+            $image.width(imageWidth);
+            $image.height(imageHeight);
+          } else {
+            imageHeight = maxImageHeight;
+            imageWidth = parseInt(preloader.width / (preloader.height / imageHeight), 10);
+            $image.width(imageWidth);
+            $image.height(imageHeight);
+          }
+        }
+      }
+      self.sizeContainer($image.width(), $image.height());
+    };
+
+    preloader.src          = this.album[imageNumber].link;
+    this.currentImageIndex = imageNumber;
+  };
+
+  // Stretch overlay to fit the viewport
+  Lightbox.prototype.sizeOverlay = function() {
+    this.$overlay
+      .width($(window).width())
+      .height($(document).height());
+  };
+
+  // Animate the size of the lightbox to fit the image we are showing
+  Lightbox.prototype.sizeContainer = function(imageWidth, imageHeight) {
+    var self = this;
+
+    var oldWidth  = this.$outerContainer.outerWidth();
+    var oldHeight = this.$outerContainer.outerHeight();
+    var newWidth  = imageWidth + this.containerLeftPadding + this.containerRightPadding;
+    var newHeight = imageHeight + this.containerTopPadding + this.containerBottomPadding;
+
+    function postResize() {
+      self.$lightbox.find('.lb-dataContainer').width(newWidth);
+      self.$lightbox.find('.lb-prevLink').height(newHeight);
+      self.$lightbox.find('.lb-nextLink').height(newHeight);
+      self.showImage();
+    }
+
+    if (oldWidth !== newWidth || oldHeight !== newHeight) {
+      this.$outerContainer.animate({
+        width: newWidth,
+        height: newHeight
+      }, this.options.resizeDuration, 'swing', function() {
+        postResize();
+      });
+    } else {
+      postResize();
+    }
+  };
+
+  // Display the image and its details and begin preload neighboring images.
+  Lightbox.prototype.showImage = function() {
+    this.$lightbox.find('.lb-loader').stop(true).hide();
+    this.$lightbox.find('.lb-image').fadeIn('slow');
+
+    this.updateNav();
+    this.updateDetails();
+    this.preloadNeighboringImages();
+    this.enableKeyboardNav();
+  };
+
+  // Display previous and next navigation if appropriate.
+  Lightbox.prototype.updateNav = function() {
+    // Check to see if the browser supports touch events. If so, we take the conservative approach
+    // and assume that mouse hover events are not supported and always show prev/next navigation
+    // arrows in image sets.
+    var alwaysShowNav = false;
+    try {
+      document.createEvent('TouchEvent');
+      alwaysShowNav = (this.options.alwaysShowNavOnTouchDevices) ? true : false;
+    } catch (e) {}
+
+    this.$lightbox.find('.lb-nav').show();
+
+    if (this.album.length > 1) {
+      if (this.options.wrapAround) {
+        if (alwaysShowNav) {
+          this.$lightbox.find('.lb-prev, .lb-next').css('opacity', '1');
+        }
+        this.$lightbox.find('.lb-prev, .lb-next').show();
+      } else {
+        if (this.currentImageIndex > 0) {
+          this.$lightbox.find('.lb-prev').show();
+          if (alwaysShowNav) {
+            this.$lightbox.find('.lb-prev').css('opacity', '1');
+          }
+        }
+        if (this.currentImageIndex < this.album.length - 1) {
+          this.$lightbox.find('.lb-next').show();
+          if (alwaysShowNav) {
+            this.$lightbox.find('.lb-next').css('opacity', '1');
+          }
+        }
+      }
+    }
+  };
+
+  // Display caption, image number, and closing button.
+  Lightbox.prototype.updateDetails = function() {
+    var self = this;
+
+    // Enable anchor clicks in the injected caption html.
+    // Thanks Nate Wright for the fix. @https://github.com/NateWr
+    if (typeof this.album[this.currentImageIndex].title !== 'undefined' &&
+      this.album[this.currentImageIndex].title !== '') {
+      this.$lightbox.find('.lb-caption')
+        .html(this.album[this.currentImageIndex].title)
+        .fadeIn('fast')
+        .find('a').on('click', function(event) {
+          if ($(this).attr('target') !== undefined) {
+            window.open($(this).attr('href'), $(this).attr('target'));
+          } else {
+            location.href = $(this).attr('href');
+          }
+        });
+    }
+
+    if (this.album.length > 1 && this.options.showImageNumberLabel) {
+      var labelText = this.imageCountLabel(this.currentImageIndex + 1, this.album.length);
+      this.$lightbox.find('.lb-number').text(labelText).fadeIn('fast');
+    } else {
+      this.$lightbox.find('.lb-number').hide();
+    }
+
+    this.$outerContainer.removeClass('animating');
+
+    this.$lightbox.find('.lb-dataContainer').fadeIn(this.options.resizeDuration, function() {
+      return self.sizeOverlay();
+    });
+  };
+
+  // Preload previous and next images in set.
+  Lightbox.prototype.preloadNeighboringImages = function() {
+    if (this.album.length > this.currentImageIndex + 1) {
+      var preloadNext = new Image();
+      preloadNext.src = this.album[this.currentImageIndex + 1].link;
+    }
+    if (this.currentImageIndex > 0) {
+      var preloadPrev = new Image();
+      preloadPrev.src = this.album[this.currentImageIndex - 1].link;
+    }
+  };
+
+  Lightbox.prototype.enableKeyboardNav = function() {
+    $(document).on('keyup.keyboard', $.proxy(this.keyboardAction, this));
+  };
+
+  Lightbox.prototype.disableKeyboardNav = function() {
+    $(document).off('.keyboard');
+  };
+
+  Lightbox.prototype.keyboardAction = function(event) {
+    var KEYCODE_ESC        = 27;
+    var KEYCODE_LEFTARROW  = 37;
+    var KEYCODE_RIGHTARROW = 39;
+
+    var keycode = event.keyCode;
+    var key     = String.fromCharCode(keycode).toLowerCase();
+    if (keycode === KEYCODE_ESC || key.match(/x|o|c/)) {
+      this.end();
+    } else if (key === 'p' || keycode === KEYCODE_LEFTARROW) {
+      if (this.currentImageIndex !== 0) {
+        this.changeImage(this.currentImageIndex - 1);
+      } else if (this.options.wrapAround && this.album.length > 1) {
+        this.changeImage(this.album.length - 1);
+      }
+    } else if (key === 'n' || keycode === KEYCODE_RIGHTARROW) {
+      if (this.currentImageIndex !== this.album.length - 1) {
+        this.changeImage(this.currentImageIndex + 1);
+      } else if (this.options.wrapAround && this.album.length > 1) {
+        this.changeImage(0);
+      }
+    }
+  };
+
+  // Closing time. :-(
+  Lightbox.prototype.end = function() {
+    this.disableKeyboardNav();
+    $(window).off('resize', this.sizeOverlay);
+    this.$lightbox.fadeOut(this.options.fadeDuration);
+    this.$overlay.fadeOut(this.options.fadeDuration);
+    $('select, object, embed').css({
+      visibility: 'visible'
+    });
+  };
+
+  return new Lightbox();
+}));

src/static/pretixpresale/less/event.less

@@ -24,6 +24,8 @@
     .productpicture {
         float: left;
         margin-right: 10px;
+        text-decoration: none;
+        display: block;
     }
 }
 .item-with-variations .product-row.headline, .product-row.simple {

src/static/pretixpresale/less/main.less

@@ -1,5 +1,6 @@
 @import "../../bootstrap/less/bootstrap.less";
 @import "../../fontawesome/less/font-awesome.less";
+@import "../../lightbox/css/lightbox.css";
 @fa-font-path: "../../fontawesome/fonts";
 
 @brand-primary: #8E44B3;