/*! lg-thumbnail - v1.0.0 - 2016-09-20
* http://sachinchoolur.github.io/lightGallery
* Copyright (c) 2016 Sachin N; Licensed GPLv3 */
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module unless amdModuleId is set
define([], function () {
return (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();
} else {
factory();
}
}(this, function () {
(function($, window, document, undefined) {
'use strict';
var defaults = {
thumbnail: true,
animateThumb: true,
currentPagerPosition: 'middle',
thumbWidth: 100,
thumbContHeight: 100,
thumbMargin: 5,
exThumbImage: false,
showThumbByDefault: true,
toogleThumb: true,
pullCaptionUp: true,
enableThumbDrag: true,
enableThumbSwipe: true,
swipeThreshold: 50,
loadYoutubeThumbnail: true,
youtubeThumbSize: 1,
loadVimeoThumbnail: true,
vimeoThumbSize: 'thumbnail_small',
loadDailymotionThumbnail: true
};
var Thumbnail = function(element) {
// get lightGallery core plugin data
this.core = $(element).data('lightGallery');
// extend module default settings with lightGallery core settings
this.core.s = $.extend({}, defaults, this.core.s);
this.$el = $(element);
this.$thumbOuter = null;
this.thumbOuterWidth = 0;
this.thumbTotalWidth = (this.core.$items.length * (this.core.s.thumbWidth + this.core.s.thumbMargin));
this.thumbIndex = this.core.index;
// Thumbnail animation value
this.left = 0;
this.init();
return this;
};
Thumbnail.prototype.init = function() {
var _this = this;
if (this.core.s.thumbnail && this.core.$items.length > 1) {
if (this.core.s.showThumbByDefault) {
setTimeout(function(){
_this.core.$outer.addClass('lg-thumb-open');
}, 700);
}
if (this.core.s.pullCaptionUp) {
this.core.$outer.addClass('lg-pull-caption-up');
}
this.build();
if (this.core.s.animateThumb) {
if (this.core.s.enableThumbDrag && !this.core.isTouch && this.core.doCss()) {
this.enableThumbDrag();
}
if (this.core.s.enableThumbSwipe && this.core.isTouch && this.core.doCss()) {
this.enableThumbSwipe();
}
this.thumbClickable = false;
} else {
this.thumbClickable = true;
}
this.toogle();
this.thumbkeyPress();
}
};
Thumbnail.prototype.build = function() {
var _this = this;
var thumbList = '';
var vimeoErrorThumbSize = '';
var $thumb;
var html = '<div class="lg-thumb-outer">' +
'<div class="lg-thumb group">' +
'</div>' +
'</div>';
switch (this.core.s.vimeoThumbSize) {
case 'thumbnail_large':
vimeoErrorThumbSize = '640';
break;
case 'thumbnail_medium':
vimeoErrorThumbSize = '200x150';
break;
case 'thumbnail_small':
vimeoErrorThumbSize = '100x75';
}
_this.core.$outer.addClass('lg-has-thumb');
_this.core.$outer.find('.lg').append(html);
_this.$thumbOuter = _this.core.$outer.find('.lg-thumb-outer');
_this.thumbOuterWidth = _this.$thumbOuter.width();
if (_this.core.s.animateThumb) {
_this.core.$outer.find('.lg-thumb').css({
width: _this.thumbTotalWidth + 'px',
position: 'relative'
});
}
if (this.core.s.animateThumb) {
_this.$thumbOuter.css('height', _this.core.s.thumbContHeight + 'px');
}
function getThumb(src, thumb, index) {
var isVideo = _this.core.isVideo(src, index) || {};
var thumbImg;
var vimeoId = '';
if (isVideo.youtube || isVideo.vimeo || isVideo.dailymotion) {
if (isVideo.youtube) {
if (_this.core.s.loadYoutubeThumbnail) {
thumbImg = '//img.youtube.com/vi/' + isVideo.youtube[1] + '/' + _this.core.s.youtubeThumbSize + '.jpg';
} else {
thumbImg = thumb;
}
} else if (isVideo.vimeo) {
if (_this.core.s.loadVimeoThumbnail) {
thumbImg = '//i.vimeocdn.com/video/error_' + vimeoErrorThumbSize + '.jpg';
vimeoId = isVideo.vimeo[1];
} else {
thumbImg = thumb;
}
} else if (isVideo.dailymotion) {
if (_this.core.s.loadDailymotionThumbnail) {
thumbImg = '//www.dailymotion.com/thumbnail/video/' + isVideo.dailymotion[1];
} else {
thumbImg = thumb;
}
}
} else {
thumbImg = thumb;
}
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>';
vimeoId = '';
}
if (_this.core.s.dynamic) {
for (var i = 0; i < _this.core.s.dynamicEl.length; i++) {
getThumb(_this.core.s.dynamicEl[i].src, _this.core.s.dynamicEl[i].thumb, i);
}
} else {
_this.core.$items.each(function(i) {
if (!_this.core.s.exThumbImage) {
getThumb($(this).attr('href') || $(this).attr('data-src'), $(this).find('img').attr('src'), i);
} else {
getThumb($(this).attr('href') || $(this).attr('data-src'), $(this).attr(_this.core.s.exThumbImage), i);
}
});
}
_this.core.$outer.find('.lg-thumb').html(thumbList);
$thumb = _this.core.$outer.find('.lg-thumb-item');
// Load vimeo thumbnails
$thumb.each(function() {
var $this = $(this);
var vimeoVideoId = $this.attr('data-vimeo-id');
if (vimeoVideoId) {
$.getJSON('//www.vimeo.com/api/v2/video/' + vimeoVideoId + '.json?callback=?', {
format: 'json'
}, function(data) {
$this.find('img').attr('src', data[0][_this.core.s.vimeoThumbSize]);
});
}
});
// manage active class for thumbnail
$thumb.eq(_this.core.index).addClass('active');
_this.core.$el.on('onBeforeSlide.lg.tm', function() {
$thumb.removeClass('active');
$thumb.eq(_this.core.index).addClass('active');
});
$thumb.on('click.lg touchend.lg', function() {
var _$this = $(this);
setTimeout(function() {
// In IE9 and bellow touch does not support
// Go to slide if browser does not support css transitions
if ((_this.thumbClickable && !_this.core.lgBusy) || !_this.core.doCss()) {
_this.core.index = _$this.index();
_this.core.slide(_this.core.index, false, true);
}
}, 50);
});
_this.core.$el.on('onBeforeSlide.lg.tm', function() {
_this.animateThumb(_this.core.index);
});
$(window).on('resize.lg.thumb orientationchange.lg.thumb', function() {
setTimeout(function() {
_this.animateThumb(_this.core.index);
_this.thumbOuterWidth = _this.$thumbOuter.width();
}, 200);
});
};
Thumbnail.prototype.setTranslate = function(value) {
// jQuery supports Automatic CSS prefixing since jQuery 1.8.0
this.core.$outer.find('.lg-thumb').css({
transform: 'translate3d(-' + (value) + 'px, 0px, 0px)'
});
};
Thumbnail.prototype.animateThumb = function(index) {
var $thumb = this.core.$outer.find('.lg-thumb');
if (this.core.s.animateThumb) {
var position;
switch (this.core.s.currentPagerPosition) {
case 'left':
position = 0;
break;
case 'middle':
position = (this.thumbOuterWidth / 2) - (this.core.s.thumbWidth / 2);
break;
case 'right':
position = this.thumbOuterWidth - this.core.s.thumbWidth;
}
this.left = ((this.core.s.thumbWidth + this.core.s.thumbMargin) * index - 1) - position;
if (this.left > (this.thumbTotalWidth - this.thumbOuterWidth)) {
this.left = this.thumbTotalWidth - this.thumbOuterWidth;
}
if (this.left < 0) {
this.left = 0;
}
if (this.core.lGalleryOn) {
if (!$thumb.hasClass('on')) {
this.core.$outer.find('.lg-thumb').css('transition-duration', this.core.s.speed + 'ms');
}
if (!this.core.doCss()) {
$thumb.animate({
left: -this.left + 'px'
}, this.core.s.speed);
}
} else {
if (!this.core.doCss()) {
$thumb.css('left', -this.left + 'px');
}
}
this.setTranslate(this.left);
}
};
// Enable thumbnail dragging and swiping
Thumbnail.prototype.enableThumbDrag = function() {
var _this = this;
var startCoords = 0;
var endCoords = 0;
var isDraging = false;
var isMoved = false;
var tempLeft = 0;
_this.$thumbOuter.addClass('lg-grab');
_this.core.$outer.find('.lg-thumb').on('mousedown.lg.thumb', function(e) {
if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
// execute only on .lg-object
e.preventDefault();
startCoords = e.pageX;
isDraging = true;
// ** Fix for webkit cursor issue https://code.google.com/p/chromium/issues/detail?id=26723
_this.core.$outer.scrollLeft += 1;
_this.core.$outer.scrollLeft -= 1;
// *
_this.thumbClickable = false;
_this.$thumbOuter.removeClass('lg-grab').addClass('lg-grabbing');
}
});
$(window).on('mousemove.lg.thumb', function(e) {
if (isDraging) {
tempLeft = _this.left;
isMoved = true;
endCoords = e.pageX;
_this.$thumbOuter.addClass('lg-dragging');
tempLeft = tempLeft - (endCoords - startCoords);
if (tempLeft > (_this.thumbTotalWidth - _this.thumbOuterWidth)) {
tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth;
}
if (tempLeft < 0) {
tempLeft = 0;
}
// move current slide
_this.setTranslate(tempLeft);
}
});
$(window).on('mouseup.lg.thumb', function() {
if (isMoved) {
isMoved = false;
_this.$thumbOuter.removeClass('lg-dragging');
_this.left = tempLeft;
if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
_this.thumbClickable = true;
}
} else {
_this.thumbClickable = true;
}
if (isDraging) {
isDraging = false;
_this.$thumbOuter.removeClass('lg-grabbing').addClass('lg-grab');
}
});
};
Thumbnail.prototype.enableThumbSwipe = function() {
var _this = this;
var startCoords = 0;
var endCoords = 0;
var isMoved = false;
var tempLeft = 0;
_this.core.$outer.find('.lg-thumb').on('touchstart.lg', function(e) {
if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
e.preventDefault();
startCoords = e.originalEvent.targetTouches[0].pageX;
_this.thumbClickable = false;
}
});
_this.core.$outer.find('.lg-thumb').on('touchmove.lg', function(e) {
if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
e.preventDefault();
endCoords = e.originalEvent.targetTouches[0].pageX;
isMoved = true;
_this.$thumbOuter.addClass('lg-dragging');
tempLeft = _this.left;
tempLeft = tempLeft - (endCoords - startCoords);
if (tempLeft > (_this.thumbTotalWidth - _this.thumbOuterWidth)) {
tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth;
}
if (tempLeft < 0) {
tempLeft = 0;
}
// move current slide
_this.setTranslate(tempLeft);
}
});
_this.core.$outer.find('.lg-thumb').on('touchend.lg', function() {
if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
if (isMoved) {
isMoved = false;
_this.$thumbOuter.removeClass('lg-dragging');
if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
_this.thumbClickable = true;
}
_this.left = tempLeft;
} else {
_this.thumbClickable = true;
}
} else {
_this.thumbClickable = true;
}
});
};
Thumbnail.prototype.toogle = function() {
var _this = this;
if (_this.core.s.toogleThumb) {
_this.core.$outer.addClass('lg-can-toggle');
_this.$thumbOuter.append('<span class="lg-toogle-thumb lg-icon"></span>');
_this.core.$outer.find('.lg-toogle-thumb').on('click.lg', function() {
_this.core.$outer.toggleClass('lg-thumb-open');
});
}
};
Thumbnail.prototype.thumbkeyPress = function() {
var _this = this;
$(window).on('keydown.lg.thumb', function(e) {
if (e.keyCode === 38) {
e.preventDefault();
_this.core.$outer.addClass('lg-thumb-open');
} else if (e.keyCode === 40) {
e.preventDefault();
_this.core.$outer.removeClass('lg-thumb-open');
}
});
};
Thumbnail.prototype.destroy = function() {
if (this.core.s.thumbnail && this.core.$items.length > 1) {
$(window).off('resize.lg.thumb orientationchange.lg.thumb keydown.lg.thumb');
this.$thumbOuter.remove();
this.core.$outer.removeClass('lg-has-thumb');
}
};
$.fn.lightGallery.modules.Thumbnail = Thumbnail;
})(jQuery, window, document);
}));