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/* =============================================================
* bootstrap-scrollspy.js v2.0.0
* http://twitter.github.com/bootstrap/javascript.html#scrollspy
* =============================================================
* Copyright 2011 Twitter, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============================================================== */
!function ( $ ) {
var $window = $(window)
function ScrollSpy() {
var process = $.proxy(this.process, this)
this.$topbar = $('body')
this.selector = '[data-scrollspy] li > a'
this.refresh()
this.$topbar.delegate(this.selector, 'click', process)
$window.scroll(process)
this.process()
}
ScrollSpy.prototype = {
refresh: function () {
this.targets = this.$topbar.find(this.selector).map(function () {
var href = $(this).attr('href')
return /^#\w/.test(href) && $(href).length ? href : null
})
this.offsets = $.map(this.targets, function (id) {
return $(id).offset().top
})
}
, process: function () {
var scrollTop = $window.scrollTop() + 10
, offsets = this.offsets
, targets = this.targets
, activeTarget = this.activeTarget
, i
for (i = offsets.length; i--;) {
activeTarget != targets[i]
&& scrollTop >= offsets[i]
&& (!offsets[i + 1] || scrollTop <= offsets[i + 1])
&& this.activate( targets[i] )
}
}
, activate: function (target) {
var active
this.activeTarget = target
this.$topbar
.find(this.selector).parent('.active')
.removeClass('active')
active = this.$topbar
.find(this.selector + '[href="' + target + '"]')
.parent('li')
.addClass('active')
if ( active.parent('.dropdown-menu') ) {
active.closest('li.dropdown').addClass('active')
}
}
}
$(function () {
new ScrollSpy()
})
}( window.jQuery || window.ender )
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