mirror of
https://github.com/twbs/bootstrap.git
synced 2024-11-29 11:24:18 +01:00
105 lines
2.9 KiB
JavaScript
105 lines
2.9 KiB
JavaScript
/* =============================================================
|
|
* bootstrap-scrollspy.js v1.3.0
|
|
* 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( topbar, selector ) {
|
|
var processScroll = $.proxy(this.processScroll, this)
|
|
this.$topbar = $(topbar)
|
|
this.selector = selector || 'li > a'
|
|
this.refresh()
|
|
this.$topbar.delegate(this.selector, 'click', processScroll)
|
|
$window.scroll(processScroll)
|
|
this.processScroll()
|
|
}
|
|
|
|
ScrollSpy.prototype = {
|
|
|
|
refresh: function () {
|
|
this.targets = this.$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
|
|
})
|
|
}
|
|
|
|
, processScroll: function () {
|
|
var scrollTop = $window.scrollTop() + 10
|
|
, offsets = this.offsets
|
|
, targets = this.targets
|
|
, activeTarget = this.activeTarget
|
|
, i
|
|
|
|
for (i = offsets.length; i--;) {
|
|
activeTarget != targets[i]
|
|
&& scrollTop >= offsets[i]
|
|
&& (!offsets[i + 1] || scrollTop <= offsets[i + 1])
|
|
&& this.activateButton( targets[i] )
|
|
}
|
|
}
|
|
|
|
, activateButton: function (target) {
|
|
this.activeTarget = target
|
|
|
|
this.$topbar
|
|
.find(this.selector).parent('.active')
|
|
.removeClass('active')
|
|
|
|
this.$topbar
|
|
.find(this.selector + '[href="' + target + '"]')
|
|
.parent('li')
|
|
.addClass('active')
|
|
}
|
|
|
|
}
|
|
|
|
/* SCROLLSPY PLUGIN DEFINITION
|
|
* =========================== */
|
|
|
|
$.fn.scrollSpy = function( options ) {
|
|
var scrollspy = this.data('scrollspy')
|
|
|
|
if (!scrollspy) {
|
|
return this.each(function () {
|
|
$(this).data('scrollspy', new ScrollSpy( this, options ))
|
|
})
|
|
}
|
|
|
|
if ( options === true ) {
|
|
return scrollspy
|
|
}
|
|
|
|
if ( typeof options == 'string' ) {
|
|
scrollspy[options]()
|
|
}
|
|
|
|
return this
|
|
}
|
|
|
|
$(document).ready(function () {
|
|
$('body').scrollSpy('[data-scrollspy] li > a')
|
|
})
|
|
|
|
}( window.jQuery || window.ender ) |