89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
/* =============================================================
|
|
* 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 ) |