/*! lightgallery - v1.2.19 - 2016-05-17
* http://sachinchoolur.github.io/lightGallery/
* Copyright (c) 2016 Sachin N; Licensed Apache 2.0 */
/**
 * Autoplay Plugin
 * @version 1.2.0
 * @author Sachin N - @sachinchoolur
 * @license MIT License (MIT)
 */

(function($, window, document, undefined) {

    'use strict';

    var defaults = {
        autoplay: false,
        pause: 5000,
        progressBar: true,
        fourceAutoplay: false,
        autoplayControls: true,
        appendAutoplayControlsTo: '.lg-toolbar'
    };

    /**
     * Creates the autoplay plugin.
     * @param {object} element - lightGallery element
     */
    var Autoplay = function(element) {

        this.core = $(element).data('lightGallery');

        this.$el = $(element);

        // Execute only if items are above 1
        if (this.core.$items.length < 2) {
            return false;
        }

        this.core.s = $.extend({}, defaults, this.core.s);
        this.interval = false;

        // Identify if slide happened from autoplay
        this.fromAuto = true;

        // Identify if autoplay canceled from touch/drag
        this.canceledOnTouch = false;

        // save fourceautoplay value
        this.fourceAutoplayTemp = this.core.s.fourceAutoplay;

        // do not allow progress bar if browser does not support css3 transitions
        if (!this.core.doCss()) {
            this.core.s.progressBar = false;
        }

        this.init();

        return this;
    };

    Autoplay.prototype.init = function() {
        var _this = this;

        // append autoplay controls
        if (_this.core.s.autoplayControls) {
            _this.controls();
        }

        // Create progress bar
        if (_this.core.s.progressBar) {
            _this.core.$outer.find('.lg').append('<div class="lg-progress-bar"><div class="lg-progress"></div></div>');
        }

        // set progress
        _this.progress();

        // Start autoplay
        if (_this.core.s.autoplay) {
            _this.startlAuto();
        }

        // cancel interval on touchstart and dragstart
        _this.$el.on('onDragstart.lg.tm touchstart.lg.tm', function() {
            if (_this.interval) {
                _this.cancelAuto();
                _this.canceledOnTouch = true;
            }
        });

        // restore autoplay if autoplay canceled from touchstart / dragstart
        _this.$el.on('onDragend.lg.tm touchend.lg.tm onSlideClick.lg.tm', function() {
            if (!_this.interval && _this.canceledOnTouch) {
                _this.startlAuto();
                _this.canceledOnTouch = false;
            }
        });

    };

    Autoplay.prototype.progress = function() {

        var _this = this;
        var _$progressBar;
        var _$progress;

        _this.$el.on('onBeforeSlide.lg.tm', function() {

            // start progress bar animation
            if (_this.core.s.progressBar && _this.fromAuto) {
                _$progressBar = _this.core.$outer.find('.lg-progress-bar');
                _$progress = _this.core.$outer.find('.lg-progress');
                if (_this.interval) {
                    _$progress.removeAttr('style');
                    _$progressBar.removeClass('lg-start');
                    setTimeout(function() {
                        _$progress.css('transition', 'width ' + (_this.core.s.speed + _this.core.s.pause) + 'ms ease 0s');
                        _$progressBar.addClass('lg-start');
                    }, 20);
                }
            }

            // Remove setinterval if slide is triggered manually and fourceautoplay is false
            if (!_this.fromAuto && !_this.core.s.fourceAutoplay) {
                _this.cancelAuto();
            }

            _this.fromAuto = false;

        });
    };

    // Manage autoplay via play/stop buttons
    Autoplay.prototype.controls = function() {
        var _this = this;
        var _html = '<span class="lg-autoplay-button lg-icon"></span>';

        // Append autoplay controls
        $(this.core.s.appendAutoplayControlsTo).append(_html);

        _this.core.$outer.find('.lg-autoplay-button').on('click.lg', function() {
            if ($(_this.core.$outer).hasClass('lg-show-autoplay')) {
                _this.cancelAuto();
                _this.core.s.fourceAutoplay = false;
            } else {
                if (!_this.interval) {
                    _this.startlAuto();
                    _this.core.s.fourceAutoplay = _this.fourceAutoplayTemp;
                }
            }
        });
    };

    // Autostart gallery
    Autoplay.prototype.startlAuto = function() {
        var _this = this;

        _this.core.$outer.find('.lg-progress').css('transition', 'width ' + (_this.core.s.speed + _this.core.s.pause) + 'ms ease 0s');
        _this.core.$outer.addClass('lg-show-autoplay');
        _this.core.$outer.find('.lg-progress-bar').addClass('lg-start');

        _this.interval = setInterval(function() {
            if (_this.core.index + 1 < _this.core.$items.length) {
                _this.core.index = _this.core.index;
            } else {
                _this.core.index = -1;
            }

            _this.core.index++;
            _this.fromAuto = true;
            _this.core.slide(_this.core.index, false, false);
        }, _this.core.s.speed + _this.core.s.pause);
    };

    // cancel Autostart
    Autoplay.prototype.cancelAuto = function() {
        clearInterval(this.interval);
        this.interval = false;
        this.core.$outer.find('.lg-progress').removeAttr('style');
        this.core.$outer.removeClass('lg-show-autoplay');
        this.core.$outer.find('.lg-progress-bar').removeClass('lg-start');
    };

    Autoplay.prototype.destroy = function() {

        this.cancelAuto();
        this.core.$outer.find('.lg-progress-bar').remove();
    };

    $.fn.lightGallery.modules.autoplay = Autoplay;

})(jQuery, window, document);
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