bootstrap/js/carousel.js

/* ========================================================================
 * Bootstrap: carousel.js v3.1.1
 * http://getbootstrap.com/javascript/#carousel
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function () { 'use strict';

  (function (o_o) {
    typeof define  == 'function' && define.amd ? define(['jquery'], o_o) :
    typeof exports == 'object' ? o_o(require('jquery')) : o_o(jQuery)
  })(function ($) {

    // CAROUSEL CLASS DEFINITION
    // =========================

    var Carousel = function (element, options) {
      this.$element    = $(element).on('keydown.bs.carousel', $.proxy(this.keydown, this))
      this.$indicators = this.$element.find('.carousel-indicators')
      this.options     = options
      this.paused      =
      this.sliding     =
      this.interval    =
      this.$active     =
      this.$items      = null

      this.options.pause == 'hover' && this.$element
        .on('mouseenter.bs.carousel', $.proxy(this.pause, this))
        .on('mouseleave.bs.carousel', $.proxy(this.cycle, this))
    }

    Carousel.VERSION  = '3.1.1'

    Carousel.DEFAULTS = {
      interval: 5000,
      pause: 'hover',
      wrap: true
    }

    Carousel.prototype.keydown = function (e) {
      switch (e.which) {
        case 37: this.prev(); break
        case 39: this.next(); break
        default: return
      }

      e.preventDefault()
    }

    Carousel.prototype.cycle = function (e) {
      e || (this.paused = false)

      this.interval && clearInterval(this.interval)

      this.options.interval
        && !this.paused
        && (this.interval = setInterval($.proxy(this.next, this), this.options.interval))

      return this
    }

    Carousel.prototype.getItemIndex = function (item) {
      this.$items = item.parent().children('.item')
      return this.$items.index(item || this.$active)
    }

    Carousel.prototype.to = function (pos) {
      var that        = this
      var activeIndex = this.getItemIndex(this.$active = this.$element.find('.item.active'))

      if (pos > (this.$items.length - 1) || pos < 0) return

      if (this.sliding)       return this.$element.one('slid.bs.carousel', function () { that.to(pos) }) // yes, "slid"
      if (activeIndex == pos) return this.pause().cycle()

      return this.slide(pos > activeIndex ? 'next' : 'prev', $(this.$items[pos]))
    }

    Carousel.prototype.pause = function (e) {
      e || (this.paused = true)

      if (this.$element.find('.next, .prev').length && $.support.transition) {
        this.$element.trigger($.support.transition.end)
        this.cycle(true)
      }

      this.interval = clearInterval(this.interval)

      return this
    }

    Carousel.prototype.next = function () {
      if (this.sliding) return
      return this.slide('next')
    }

    Carousel.prototype.prev = function () {
      if (this.sliding) return
      return this.slide('prev')
    }

    Carousel.prototype.slide = function (type, next) {
      var $active   = this.$element.find('.item.active')
      var $next     = next || $active[type]()
      var isCycling = this.interval
      var direction = type == 'next' ? 'left' : 'right'
      var fallback  = type == 'next' ? 'first' : 'last'
      var that      = this

      if (!$next.length) {
        if (!this.options.wrap) return
        $next = this.$element.find('.item')[fallback]()
      }

      if ($next.hasClass('active')) return (this.sliding = false)

      var relatedTarget = $next[0]
      var slideEvent = $.Event('slide.bs.carousel', {
        relatedTarget: relatedTarget,
        direction: direction
      })
      this.$element.trigger(slideEvent)
      if (slideEvent.isDefaultPrevented()) return

      this.sliding = true

      isCycling && this.pause()

      if (this.$indicators.length) {
        this.$indicators.find('.active').removeClass('active')
        var $nextIndicator = $(this.$indicators.children()[this.getItemIndex($next)])
        $nextIndicator && $nextIndicator.addClass('active')
      }

      var slidEvent = $.Event('slid.bs.carousel', { relatedTarget: relatedTarget, direction: direction }) // yes, "slid"
      if ($.support.transition && this.$element.hasClass('slide')) {
        $next.addClass(type)
        $next[0].offsetWidth // force reflow
        $active.addClass(direction)
        $next.addClass(direction)
        $active
          .one('bsTransitionEnd', function () {
            $next.removeClass([type, direction].join(' ')).addClass('active')
            $active.removeClass(['active', direction].join(' '))
            that.sliding = false
            setTimeout(function () {
              that.$element.trigger(slidEvent)
            }, 0)
          })
          .emulateTransitionEnd($active.css('transition-duration').slice(0, -1) * 1000)
      } else {
        $active.removeClass('active')
        $next.addClass('active')
        this.sliding = false
        this.$element.trigger(slidEvent)
      }

      isCycling && this.cycle()

      return this
    }


    // CAROUSEL PLUGIN DEFINITION
    // ==========================

    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.carousel')
        var options = $.extend({}, Carousel.DEFAULTS, $this.data(), typeof option == 'object' && option)
        var action  = typeof option == 'string' ? option : options.slide

        if (!data) $this.data('bs.carousel', (data = new Carousel(this, options)))
        if (typeof option == 'number') data.to(option)
        else if (action) data[action]()
        else if (options.interval) data.pause().cycle()
      })
    }

    var old = $.fn.carousel

    $.fn.carousel             = Plugin
    $.fn.carousel.Constructor = Carousel


    // CAROUSEL NO CONFLICT
    // ====================

    $.fn.carousel.noConflict = function () {
      $.fn.carousel = old
      return this
    }


    // CAROUSEL DATA-API
    // =================

    $(document).on('click.bs.carousel.data-api', '[data-slide], [data-slide-to]', function (e) {
      var href
      var $this   = $(this)
      var $target = $($this.attr('data-target') || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) // strip for ie7
      var options = $.extend({}, $target.data(), $this.data())
      var slideIndex = $this.attr('data-slide-to')
      if (slideIndex) options.interval = false

      Plugin.call($target, options)

      if (slideIndex) {
        $target.data('bs.carousel').to(slideIndex)
      }

      e.preventDefault()
    })

    $(window).on('load', function () {
      $('[data-ride="carousel"]').each(function () {
        var $carousel = $(this)
        Plugin.call($carousel, $carousel.data())
      })
    })

  })

}();