http://tversocium.ru/library/js/lightbox.js

1
2/*
3Lightbox v2.51
4by Lokesh Dhakar - http://www.lokeshdhakar.com
5
6For more information, visit:
7http://lokeshdhakar.com/projects/lightbox2/
8
9Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
10- free for use in both personal and commercial projects
11- attribution requires leaving author name, author link, and the license info intact
12	
13Thanks
14- Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
15- Artemy Tregubenko (arty.name) for cleanup and help in updating to latest proto-aculous in v2.05.
16
17
18Table of Contents
19=================
20LightboxOptions
21
22Lightbox
23- constructor
24- init
25- enable
26- build
27- start
28- changeImage
29- sizeContainer
30- showImage
31- updateNav
32- updateDetails
33- preloadNeigbhoringImages
34- enableKeyboardNav
35- disableKeyboardNav
36- keyboardAction
37- end
38
39options = new LightboxOptions
40lightbox = new Lightbox options
41*/
42
43(function() {
44  var $, Lightbox, LightboxOptions;
45
46  $ = jQuery;
47
48  LightboxOptions = (function() {
49
50    function LightboxOptions() {
51      this.fileLoadingImage = 'images/loading.gif';
52      this.fileCloseImage = 'images/close.png';
53      this.resizeDuration = 700;
54      this.fadeDuration = 500;
55      this.labelImage = "Image";
56      this.labelOf = "of";
57    }
58
59    return LightboxOptions;
60
61  })();
62
63  Lightbox = (function() {
64
65    function Lightbox(options) {
66      this.options = options;
67      this.album = [];
68      this.currentImageIndex = void 0;
69      this.init();
70    }
71
72    Lightbox.prototype.init = function() {
73      this.enable();
74      return this.build();
75    };
76
77    Lightbox.prototype.enable = function() {
78      var _this = this;
79      return $('body').on('click', 'a[rel^=lightbox], area[rel^=lightbox]', function(e) {
80        _this.start($(e.currentTarget));
81        return false;
82      });
83    };
84
85    Lightbox.prototype.build = function() {
86      var $lightbox,
87        _this = this;
88      $("<div>", {
89        id: 'lightboxOverlay'
90      }).after($('<div/>', {
91        id: 'lightbox'
92      }).append($('<div/>', {
93        "class": 'lb-outerContainer'
94      }).append($('<div/>', {
95        "class": 'lb-container'
96      }).append($('<img/>', {
97        "class": 'lb-image'
98      }), $('<div/>', {
99        "class": 'lb-nav'
100      }).append($('<a/>', {
101        "class": 'lb-prev'
102      }), $('<a/>', {
103        "class": 'lb-next'
104      })), $('<div/>', {
105        "class": 'lb-loader'
106      }).append($('<a/>', {
107        "class": 'lb-cancel'
108      }).append($('<img/>', {
109        src: this.options.fileLoadingImage
110      }))))), $('<div/>', {
111        "class": 'lb-dataContainer'
112      }).append($('<div/>', {
113        "class": 'lb-data'
114      }).append($('<div/>', {
115        "class": 'lb-details'
116      }).append($('<span/>', {
117        "class": 'lb-caption'
118      }), $('<span/>', {
119        "class": 'lb-number'
120      })), $('<div/>', {
121        "class": 'lb-closeContainer'
122      }).append($('<a/>', {
123        "class": 'lb-close'
124      }).append($('<img/>', {
125        src: this.options.fileCloseImage
126      }))))))).appendTo($('body'));
127      $('#lightboxOverlay').hide().on('click', function(e) {
128        _this.end();
129        return false;
130      });
131      $lightbox = $('#lightbox');
132      $lightbox.hide().on('click', function(e) {
133        if ($(e.target).attr('id') === 'lightbox') _this.end();
134        return false;
135      });
136      $lightbox.find('.lb-outerContainer').on('click', function(e) {
137        if ($(e.target).attr('id') === 'lightbox') _this.end();
138        return false;
139      });
140      $lightbox.find('.lb-prev').on('click', function(e) {
141        _this.changeImage(_this.currentImageIndex - 1);
142        return false;
143      });
144      $lightbox.find('.lb-next').on('click', function(e) {
145        _this.changeImage(_this.currentImageIndex + 1);
146        return false;
147      });
148      $lightbox.find('.lb-loader, .lb-close').on('click', function(e) {
149        _this.end();
150        return false;
151      });
152    };
153
154    Lightbox.prototype.start = function($link) {
155      var $lightbox, $window, a, i, imageNumber, left, top, _len, _ref;
156      $(window).on("resize", this.sizeOverlay);
157      $('select, object, embed').css({
158        visibility: "hidden"
159      });
160      $('#lightboxOverlay').width($(document).width()).height($(document).height()).fadeIn(this.options.fadeDuration);
161      this.album = [];
162      imageNumber = 0;
163      if ($link.attr('rel') === 'lightbox') {
164        this.album.push({
165          link: $link.attr('href'),
166          title: $link.attr('title')
167        });
168      } else {
169        _ref = $($link.prop("tagName") + '[rel="' + $link.attr('rel') + '"]');
170        for (i = 0, _len = _ref.length; i < _len; i++) {
171          a = _ref[i];
172          this.album.push({
173            link: $(a).attr('href'),
174            title: $(a).attr('title')
175          });
176          if ($(a).attr('href') === $link.attr('href')) imageNumber = i;
177        }
178      }
179      $window = $(window);
180      top = $window.scrollTop() + $window.height() / 10;
181      left = $window.scrollLeft();
182      $lightbox = $('#lightbox');
183      $lightbox.css({
184        top: top + 'px',
185        left: left + 'px'
186      }).fadeIn(this.options.fadeDuration);
187      this.changeImage(imageNumber);
188    };
189
190    Lightbox.prototype.changeImage = function(imageNumber) {
191      var $image, $lightbox, preloader,
192        _this = this;
193      this.disableKeyboardNav();
194      $lightbox = $('#lightbox');
195      $image = $lightbox.find('.lb-image');
196      this.sizeOverlay();
197      $('#lightboxOverlay').fadeIn(this.options.fadeDuration);
198      $('.loader').fadeIn('slow');
199      $lightbox.find('.lb-image, .lb-nav, .lb-prev, .lb-next, .lb-dataContainer, .lb-numbers, .lb-caption').hide();
200      $lightbox.find('.lb-outerContainer').addClass('animating');
201      preloader = new Image;
202      preloader.onload = function() {
203        $image.attr('src', _this.album[imageNumber].link);
204        $image.width = preloader.width;
205        $image.height = preloader.height;
206        return _this.sizeContainer(preloader.width, preloader.height);
207      };
208      preloader.src = this.album[imageNumber].link;
209      this.currentImageIndex = imageNumber;
210    };
211
212    Lightbox.prototype.sizeOverlay = function() {
213      return $('#lightboxOverlay').width($(document).width()).height($(document).height());
214    };
215
216    Lightbox.prototype.sizeContainer = function(imageWidth, imageHeight) {
217      var $container, $lightbox, $outerContainer, containerBottomPadding, containerLeftPadding, containerRightPadding, containerTopPadding, newHeight, newWidth, oldHeight, oldWidth,
218        _this = this;
219      $lightbox = $('#lightbox');
220      $outerContainer = $lightbox.find('.lb-outerContainer');
221      oldWidth = $outerContainer.outerWidth();
222      oldHeight = $outerContainer.outerHeight();
223      $container = $lightbox.find('.lb-container');
224      containerTopPadding = parseInt($container.css('padding-top'), 10);
225      containerRightPadding = parseInt($container.css('padding-right'), 10);
226      containerBottomPadding = parseInt($container.css('padding-bottom'), 10);
227      containerLeftPadding = parseInt($container.css('padding-left'), 10);
228      newWidth = imageWidth + containerLeftPadding + containerRightPadding;
229      newHeight = imageHeight + containerTopPadding + containerBottomPadding;
230      if (newWidth !== oldWidth && newHeight !== oldHeight) {
231        $outerContainer.animate({
232          width: newWidth,
233          height: newHeight
234        }, this.options.resizeDuration, 'swing');
235      } else if (newWidth !== oldWidth) {
236        $outerContainer.animate({
237          width: newWidth
238        }, this.options.resizeDuration, 'swing');
239      } else if (newHeight !== oldHeight) {
240        $outerContainer.animate({
241          height: newHeight
242        }, this.options.resizeDuration, 'swing');
243      }
244      setTimeout(function() {
245        $lightbox.find('.lb-dataContainer').width(newWidth);
246        $lightbox.find('.lb-prevLink').height(newHeight);
247        $lightbox.find('.lb-nextLink').height(newHeight);
248        _this.showImage();
249      }, this.options.resizeDuration);
250    };
251
252    Lightbox.prototype.showImage = function() {
253      var $lightbox;
254      $lightbox = $('#lightbox');
255      $lightbox.find('.lb-loader').hide();
256      $lightbox.find('.lb-image').fadeIn('slow');
257      this.updateNav();
258      this.updateDetails();
259      this.preloadNeighboringImages();
260      this.enableKeyboardNav();
261    };
262
263    Lightbox.prototype.updateNav = function() {
264      var $lightbox;
265      $lightbox = $('#lightbox');
266      $lightbox.find('.lb-nav').show();
267      if (this.currentImageIndex > 0) $lightbox.find('.lb-prev').show();
268      if (this.currentImageIndex < this.album.length - 1) {
269        $lightbox.find('.lb-next').show();
270      }
271    };
272
273    Lightbox.prototype.updateDetails = function() {
274      var $lightbox,
275        _this = this;
276      $lightbox = $('#lightbox');
277      if (typeof this.album[this.currentImageIndex].title !== 'undefined' && this.album[this.currentImageIndex].title !== "") {
278        $lightbox.find('.lb-caption').html(this.album[this.currentImageIndex].title).fadeIn('fast');
279      }
280      if (this.album.length > 1) {
281        $lightbox.find('.lb-number').html(this.options.labelImage + ' ' + (this.currentImageIndex + 1) + ' ' + this.options.labelOf + '  ' + this.album.length).fadeIn('fast');
282      } else {
283        $lightbox.find('.lb-number').hide();
284      }
285      $lightbox.find('.lb-outerContainer').removeClass('animating');
286      $lightbox.find('.lb-dataContainer').fadeIn(this.resizeDuration, function() {
287        return _this.sizeOverlay();
288      });
289    };
290
291    Lightbox.prototype.preloadNeighboringImages = function() {
292      var preloadNext, preloadPrev;
293      if (this.album.length > this.currentImageIndex + 1) {
294        preloadNext = new Image;
295        preloadNext.src = this.album[this.currentImageIndex + 1].link;
296      }
297      if (this.currentImageIndex > 0) {
298        preloadPrev = new Image;
299        preloadPrev.src = this.album[this.currentImageIndex - 1].link;
300      }
301    };
302
303    Lightbox.prototype.enableKeyboardNav = function() {
304      $(document).on('keyup.keyboard', $.proxy(this.keyboardAction, this));
305    };
306
307    Lightbox.prototype.disableKeyboardNav = function() {
308      $(document).off('.keyboard');
309    };
310
311    Lightbox.prototype.keyboardAction = function(event) {
312      var KEYCODE_ESC, KEYCODE_LEFTARROW, KEYCODE_RIGHTARROW, key, keycode;
313      KEYCODE_ESC = 27;
314      KEYCODE_LEFTARROW = 37;
315      KEYCODE_RIGHTARROW = 39;
316      keycode = event.keyCode;
317      key = String.fromCharCode(keycode).toLowerCase();
318      if (keycode === KEYCODE_ESC || key.match(/x|o|c/)) {
319        this.end();
320      } else if (key === 'p' || keycode === KEYCODE_LEFTARROW) {
321        if (this.currentImageIndex !== 0) {
322          this.changeImage(this.currentImageIndex - 1);
323        }
324      } else if (key === 'n' || keycode === KEYCODE_RIGHTARROW) {
325        if (this.currentImageIndex !== this.album.length - 1) {
326          this.changeImage(this.currentImageIndex + 1);
327        }
328      }
329    };
330
331    Lightbox.prototype.end = function() {
332      this.disableKeyboardNav();
333      $(window).off("resize", this.sizeOverlay);
334      $('#lightbox').fadeOut(this.options.fadeDuration);
335      $('#lightboxOverlay').fadeOut(this.options.fadeDuration);
336      return $('select, object, embed').css({
337        visibility: "visible"
338      });
339    };
340
341    return Lightbox;
342
343  })();
344
345  $(function() {
346    var lightbox, options;
347    options = new LightboxOptions;
348    return lightbox = new Lightbox(options);
349  });
350
351}).call(this);