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/* ========================================================================
* Bootstrap: scrollspy.js v3.1.1
* http://getbootstrap.com/javascript/#scrollspy
* ========================================================================
* Copyright 2011-2014 Twitter, Inc.
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
* ======================================================================== */
+function ($) {
'use strict';
// SCROLLSPY CLASS DEFINITION
// ==========================
function ScrollSpy(element, options) {
var href
var process = $.proxy(this.process, this)
this.$element = $(element).is('body') ? $(window) : $(element)
this.$body = $('body')
this.$scrollElement = this.$element.on('scroll.bs.scroll-spy.data-api', process)
this.options = $.extend({}, ScrollSpy.DEFAULTS, options)
this.selector = (this.options.target
|| ((href = $(element).attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
|| '') + ' .nav li > a'
this.offsets = $([])
this.targets = $([])
this.activeTarget = null
this.refresh()
this.process()
}
ScrollSpy.DEFAULTS = {
offset: 10
}
ScrollSpy.prototype.refresh = function () {
var offsetMethod = this.$element[0] == window ? 'offset' : 'position'
this.offsets = $([])
this.targets = $([])
var self = this
var $targets = this.$body
.find(this.selector)
.map(function () {
var $el = $(this)
var href = $el.data('target') || $el.attr('href')
var $href = /^#./.test(href) && $(href)
return ($href
&& $href.length
&& $href.is(':visible')
&& [[ $href[offsetMethod]().top + (!$.isWindow(self.$scrollElement.get(0)) && self.$scrollElement.scrollTop()), href ]]) || null
})
.sort(function (a, b) { return a[0] - b[0] })
.each(function () {
self.offsets.push(this[0])
self.targets.push(this[1])
})
}
ScrollSpy.prototype.process = function () {
var scrollTop = this.$scrollElement.scrollTop() + this.options.offset
var scrollHeight = this.$scrollElement[0].scrollHeight || this.$body[0].scrollHeight
var maxScroll = scrollHeight - this.$scrollElement.height()
var offsets = this.offsets
var targets = this.targets
var activeTarget = this.activeTarget
var i
if (scrollTop >= maxScroll) {
return activeTarget != (i = targets.last()[0]) && this.activate(i)
}
if (activeTarget && scrollTop <= offsets[0]) {
return activeTarget != (i = targets[0]) && this.activate(i)
}
for (i = offsets.length; i--;) {
activeTarget != targets[i]
&& scrollTop >= offsets[i]
&& (!offsets[i + 1] || scrollTop <= offsets[i + 1])
&& this.activate( targets[i] )
}
}
ScrollSpy.prototype.activate = function (target) {
this.activeTarget = target
$(this.selector)
.parentsUntil(this.options.target, '.active')
.removeClass('active')
var selector = this.selector +
'[data-target="' + target + '"],' +
this.selector + '[href="' + target + '"]'
var active = $(selector)
.parents('li')
.addClass('active')
if (active.parent('.dropdown-menu').length) {
active = active
.closest('li.dropdown')
.addClass('active')
}
active.trigger('activate.bs.scrollspy')
}
// SCROLLSPY PLUGIN DEFINITION
// ===========================
var old = $.fn.scrollspy
$.fn.scrollspy = function (option) {
return this.each(function () {
var $this = $(this)
var data = $this.data('bs.scrollspy')
var options = typeof option == 'object' && option
if (!data) $this.data('bs.scrollspy', (data = new ScrollSpy(this, options)))
if (typeof option == 'string') data[option]()
})
}
$.fn.scrollspy.Constructor = ScrollSpy
// SCROLLSPY NO CONFLICT
// =====================
$.fn.scrollspy.noConflict = function () {
$.fn.scrollspy = old
return this
}
// SCROLLSPY DATA-API
// ==================
$(window).on('load', function () {
$('[data-spy="scroll"]').each(function () {
var $spy = $(this)
$spy.scrollspy($spy.data())
})
})
}(jQuery);
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