1/*! lg-thumbnail - v1.0.3 - 2017-02-05
2* http://sachinchoolur.github.io/lightGallery
3* Copyright (c) 2017 Sachin N; Licensed GPLv3 */
4
5(function (root, factory) {
6  if (typeof define === 'function' && define.amd) {
7    // AMD. Register as an anonymous module unless amdModuleId is set
8    define(['jquery'], function (a0) {
9      return (factory(a0));
10    });
11  } else if (typeof exports === 'object') {
12    // Node. Does not work with strict CommonJS, but
13    // only CommonJS-like environments that support module.exports,
14    // like Node.
15    module.exports = factory(require('jquery'));
16  } else {
17    factory(jQuery);
18  }
19}(this, function ($) {
20
21(function() {
22
23    'use strict';
24
25    var defaults = {
26        thumbnail: true,
27
28        animateThumb: true,
29        currentPagerPosition: 'middle',
30
31        thumbWidth: 100,
32        thumbContHeight: 100,
33        thumbMargin: 5,
34
35        exThumbImage: false,
36        showThumbByDefault: true,
37        toogleThumb: true,
38        pullCaptionUp: true,
39
40        enableThumbDrag: true,
41        enableThumbSwipe: true,
42        swipeThreshold: 50,
43
44        loadYoutubeThumbnail: true,
45        youtubeThumbSize: 1,
46
47        loadVimeoThumbnail: true,
48        vimeoThumbSize: 'thumbnail_small',
49
50        loadDailymotionThumbnail: true
51    };
52
53    var Thumbnail = function(element) {
54
55        // get lightGallery core plugin data
56        this.core = $(element).data('lightGallery');
57
58        // extend module default settings with lightGallery core settings
59        this.core.s = $.extend({}, defaults, this.core.s);
60
61        this.$el = $(element);
62        this.$thumbOuter = null;
63        this.thumbOuterWidth = 0;
64        this.thumbTotalWidth = (this.core.$items.length * (this.core.s.thumbWidth + this.core.s.thumbMargin));
65        this.thumbIndex = this.core.index;
66
67        // Thumbnail animation value
68        this.left = 0;
69
70        this.init();
71
72        return this;
73    };
74
75    Thumbnail.prototype.init = function() {
76        var _this = this;
77        if (this.core.s.thumbnail && this.core.$items.length > 1) {
78            if (this.core.s.showThumbByDefault) {
79                setTimeout(function(){
80                    _this.core.$outer.addClass('lg-thumb-open');
81                }, 700);
82            }
83
84            if (this.core.s.pullCaptionUp) {
85                this.core.$outer.addClass('lg-pull-caption-up');
86            }
87
88            this.build();
89            if (this.core.s.animateThumb) {
90                if (this.core.s.enableThumbDrag && !this.core.isTouch && this.core.doCss()) {
91                    this.enableThumbDrag();
92                }
93
94                if (this.core.s.enableThumbSwipe && this.core.isTouch && this.core.doCss()) {
95                    this.enableThumbSwipe();
96                }
97
98                this.thumbClickable = false;
99            } else {
100                this.thumbClickable = true;
101            }
102
103            this.toogle();
104            this.thumbkeyPress();
105        }
106    };
107
108    Thumbnail.prototype.build = function() {
109        var _this = this;
110        var thumbList = '';
111        var vimeoErrorThumbSize = '';
112        var $thumb;
113        var html = '<div class="lg-thumb-outer">' +
114            '<div class="lg-thumb lg-group">' +
115            '</div>' +
116            '</div>';
117
118        switch (this.core.s.vimeoThumbSize) {
119            case 'thumbnail_large':
120                vimeoErrorThumbSize = '640';
121                break;
122            case 'thumbnail_medium':
123                vimeoErrorThumbSize = '200x150';
124                break;
125            case 'thumbnail_small':
126                vimeoErrorThumbSize = '100x75';
127        }
128
129        _this.core.$outer.addClass('lg-has-thumb');
130
131        _this.core.$outer.find('.lg').append(html);
132
133        _this.$thumbOuter = _this.core.$outer.find('.lg-thumb-outer');
134        _this.thumbOuterWidth = _this.$thumbOuter.width();
135
136        if (_this.core.s.animateThumb) {
137            _this.core.$outer.find('.lg-thumb').css({
138                width: _this.thumbTotalWidth + 'px',
139                position: 'relative'
140            });
141        }
142
143        if (this.core.s.animateThumb) {
144            _this.$thumbOuter.css('height', _this.core.s.thumbContHeight + 'px');
145        }
146
147        function getThumb(src, thumb, index) {
148            var isVideo = _this.core.isVideo(src, index) || {};
149            var thumbImg;
150            var vimeoId = '';
151
152            if (isVideo.youtube || isVideo.vimeo || isVideo.dailymotion) {
153                if (isVideo.youtube) {
154                    if (_this.core.s.loadYoutubeThumbnail) {
155                        thumbImg = '//img.youtube.com/vi/' + isVideo.youtube[1] + '/' + _this.core.s.youtubeThumbSize + '.jpg';
156                    } else {
157                        thumbImg = thumb;
158                    }
159                } else if (isVideo.vimeo) {
160                    if (_this.core.s.loadVimeoThumbnail) {
161                        thumbImg = '//i.vimeocdn.com/video/error_' + vimeoErrorThumbSize + '.jpg';
162                        vimeoId = isVideo.vimeo[1];
163                    } else {
164                        thumbImg = thumb;
165                    }
166                } else if (isVideo.dailymotion) {
167                    if (_this.core.s.loadDailymotionThumbnail) {
168                        thumbImg = '//www.dailymotion.com/thumbnail/video/' + isVideo.dailymotion[1];
169                    } else {
170                        thumbImg = thumb;
171                    }
172                }
173            } else {
174                thumbImg = thumb;
175            }
176
177            thumbList += '<div data-vimeo-id="' + vimeoId + '" class="lg-thumb-item" style="width:' + _this.core.s.thumbWidth + 'px; margin-right: ' + _this.core.s.thumbMargin + 'px"><img src="' + thumbImg + '" /></div>';
178            vimeoId = '';
179        }
180
181        if (_this.core.s.dynamic) {
182            for (var i = 0; i < _this.core.s.dynamicEl.length; i++) {
183                getThumb(_this.core.s.dynamicEl[i].src, _this.core.s.dynamicEl[i].thumb, i);
184            }
185        } else {
186            _this.core.$items.each(function(i) {
187
188                if (!_this.core.s.exThumbImage) {
189                    getThumb($(this).attr('href') || $(this).attr('data-src'), $(this).find('img').attr('src'), i);
190                } else {
191                    getThumb($(this).attr('href') || $(this).attr('data-src'), $(this).attr(_this.core.s.exThumbImage), i);
192                }
193
194            });
195        }
196
197        _this.core.$outer.find('.lg-thumb').html(thumbList);
198
199        $thumb = _this.core.$outer.find('.lg-thumb-item');
200
201        // Load vimeo thumbnails
202        $thumb.each(function() {
203            var $this = $(this);
204            var vimeoVideoId = $this.attr('data-vimeo-id');
205
206            if (vimeoVideoId) {
207                $.getJSON('//www.vimeo.com/api/v2/video/' + vimeoVideoId + '.json?callback=?', {
208                    format: 'json'
209                }, function(data) {
210                    $this.find('img').attr('src', data[0][_this.core.s.vimeoThumbSize]);
211                });
212            }
213        });
214
215        // manage active class for thumbnail
216        $thumb.eq(_this.core.index).addClass('active');
217        _this.core.$el.on('onBeforeSlide.lg.tm', function() {
218            $thumb.removeClass('active');
219            $thumb.eq(_this.core.index).addClass('active');
220        });
221
222        $thumb.on('click.lg touchend.lg', function() {
223            var _$this = $(this);
224            setTimeout(function() {
225
226                // In IE9 and bellow touch does not support
227                // Go to slide if browser does not support css transitions
228                if ((_this.thumbClickable && !_this.core.lgBusy) || !_this.core.doCss()) {
229                    _this.core.index = _$this.index();
230                    _this.core.slide(_this.core.index, false, true, false);
231                }
232            }, 50);
233        });
234
235        _this.core.$el.on('onBeforeSlide.lg.tm', function() {
236            _this.animateThumb(_this.core.index);
237        });
238
239        $(window).on('resize.lg.thumb orientationchange.lg.thumb', function() {
240            setTimeout(function() {
241                _this.animateThumb(_this.core.index);
242                _this.thumbOuterWidth = _this.$thumbOuter.width();
243            }, 200);
244        });
245
246    };
247
248    Thumbnail.prototype.setTranslate = function(value) {
249        // jQuery supports Automatic CSS prefixing since jQuery 1.8.0
250        this.core.$outer.find('.lg-thumb').css({
251            transform: 'translate3d(-' + (value) + 'px, 0px, 0px)'
252        });
253    };
254
255    Thumbnail.prototype.animateThumb = function(index) {
256        var $thumb = this.core.$outer.find('.lg-thumb');
257        if (this.core.s.animateThumb) {
258            var position;
259            switch (this.core.s.currentPagerPosition) {
260                case 'left':
261                    position = 0;
262                    break;
263                case 'middle':
264                    position = (this.thumbOuterWidth / 2) - (this.core.s.thumbWidth / 2);
265                    break;
266                case 'right':
267                    position = this.thumbOuterWidth - this.core.s.thumbWidth;
268            }
269            this.left = ((this.core.s.thumbWidth + this.core.s.thumbMargin) * index - 1) - position;
270            if (this.left > (this.thumbTotalWidth - this.thumbOuterWidth)) {
271                this.left = this.thumbTotalWidth - this.thumbOuterWidth;
272            }
273
274            if (this.left < 0) {
275                this.left = 0;
276            }
277
278            if (this.core.lGalleryOn) {
279                if (!$thumb.hasClass('on')) {
280                    this.core.$outer.find('.lg-thumb').css('transition-duration', this.core.s.speed + 'ms');
281                }
282
283                if (!this.core.doCss()) {
284                    $thumb.animate({
285                        left: -this.left + 'px'
286                    }, this.core.s.speed);
287                }
288            } else {
289                if (!this.core.doCss()) {
290                    $thumb.css('left', -this.left + 'px');
291                }
292            }
293
294            this.setTranslate(this.left);
295
296        }
297    };
298
299    // Enable thumbnail dragging and swiping
300    Thumbnail.prototype.enableThumbDrag = function() {
301
302        var _this = this;
303        var startCoords = 0;
304        var endCoords = 0;
305        var isDraging = false;
306        var isMoved = false;
307        var tempLeft = 0;
308
309        _this.$thumbOuter.addClass('lg-grab');
310
311        _this.core.$outer.find('.lg-thumb').on('mousedown.lg.thumb', function(e) {
312            if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
313                // execute only on .lg-object
314                e.preventDefault();
315                startCoords = e.pageX;
316                isDraging = true;
317
318                // ** Fix for webkit cursor issue https://code.google.com/p/chromium/issues/detail?id=26723
319                _this.core.$outer.scrollLeft += 1;
320                _this.core.$outer.scrollLeft -= 1;
321
322                // *
323                _this.thumbClickable = false;
324                _this.$thumbOuter.removeClass('lg-grab').addClass('lg-grabbing');
325            }
326        });
327
328        $(window).on('mousemove.lg.thumb', function(e) {
329            if (isDraging) {
330                tempLeft = _this.left;
331                isMoved = true;
332                endCoords = e.pageX;
333
334                _this.$thumbOuter.addClass('lg-dragging');
335
336                tempLeft = tempLeft - (endCoords - startCoords);
337
338                if (tempLeft > (_this.thumbTotalWidth - _this.thumbOuterWidth)) {
339                    tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth;
340                }
341
342                if (tempLeft < 0) {
343                    tempLeft = 0;
344                }
345
346                // move current slide
347                _this.setTranslate(tempLeft);
348
349            }
350        });
351
352        $(window).on('mouseup.lg.thumb', function() {
353            if (isMoved) {
354                isMoved = false;
355                _this.$thumbOuter.removeClass('lg-dragging');
356
357                _this.left = tempLeft;
358
359                if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
360                    _this.thumbClickable = true;
361                }
362
363            } else {
364                _this.thumbClickable = true;
365            }
366
367            if (isDraging) {
368                isDraging = false;
369                _this.$thumbOuter.removeClass('lg-grabbing').addClass('lg-grab');
370            }
371        });
372
373    };
374
375    Thumbnail.prototype.enableThumbSwipe = function() {
376        var _this = this;
377        var startCoords = 0;
378        var endCoords = 0;
379        var isMoved = false;
380        var tempLeft = 0;
381
382        _this.core.$outer.find('.lg-thumb').on('touchstart.lg', function(e) {
383            if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
384                e.preventDefault();
385                startCoords = e.originalEvent.targetTouches[0].pageX;
386                _this.thumbClickable = false;
387            }
388        });
389
390        _this.core.$outer.find('.lg-thumb').on('touchmove.lg', function(e) {
391            if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
392                e.preventDefault();
393                endCoords = e.originalEvent.targetTouches[0].pageX;
394                isMoved = true;
395
396                _this.$thumbOuter.addClass('lg-dragging');
397
398                tempLeft = _this.left;
399
400                tempLeft = tempLeft - (endCoords - startCoords);
401
402                if (tempLeft > (_this.thumbTotalWidth - _this.thumbOuterWidth)) {
403                    tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth;
404                }
405
406                if (tempLeft < 0) {
407                    tempLeft = 0;
408                }
409
410                // move current slide
411                _this.setTranslate(tempLeft);
412
413            }
414        });
415
416        _this.core.$outer.find('.lg-thumb').on('touchend.lg', function() {
417            if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
418
419                if (isMoved) {
420                    isMoved = false;
421                    _this.$thumbOuter.removeClass('lg-dragging');
422                    if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
423                        _this.thumbClickable = true;
424                    }
425
426                    _this.left = tempLeft;
427                } else {
428                    _this.thumbClickable = true;
429                }
430            } else {
431                _this.thumbClickable = true;
432            }
433        });
434
435    };
436
437    Thumbnail.prototype.toogle = function() {
438        var _this = this;
439        if (_this.core.s.toogleThumb) {
440            _this.core.$outer.addClass('lg-can-toggle');
441            _this.$thumbOuter.append('<span class="lg-toogle-thumb lg-icon"></span>');
442            _this.core.$outer.find('.lg-toogle-thumb').on('click.lg', function() {
443                _this.core.$outer.toggleClass('lg-thumb-open');
444            });
445        }
446    };
447
448    Thumbnail.prototype.thumbkeyPress = function() {
449        var _this = this;
450        $(window).on('keydown.lg.thumb', function(e) {
451            if (e.keyCode === 38) {
452                e.preventDefault();
453                _this.core.$outer.addClass('lg-thumb-open');
454            } else if (e.keyCode === 40) {
455                e.preventDefault();
456                _this.core.$outer.removeClass('lg-thumb-open');
457            }
458        });
459    };
460
461    Thumbnail.prototype.destroy = function() {
462        if (this.core.s.thumbnail && this.core.$items.length > 1) {
463            $(window).off('resize.lg.thumb orientationchange.lg.thumb keydown.lg.thumb');
464            this.$thumbOuter.remove();
465            this.core.$outer.removeClass('lg-has-thumb');
466        }
467    };
468
469    $.fn.lightGallery.modules.Thumbnail = Thumbnail;
470
471})();
472
473}));
474