| /* ============================================================= |
| * bootstrap-scrollspy.js v2.0.0 |
| * http://twitter.github.com/bootstrap/javascript.html#scrollspy |
| * ============================================================= |
| * Copyright 2012 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 ( $ ) { |
| |
| "use strict" |
| |
| /* SCROLLSPY CLASS DEFINITION |
| * ========================== */ |
| |
| function ScrollSpy( element, options) { |
| var process = $.proxy(this.process, this) |
| , $element = $(element).is('body') ? $(window) : $(element) |
| , href |
| this.options = $.extend({}, $.fn.scrollspy.defaults, options) |
| this.$scrollElement = $element.on('scroll.scroll.data-api', process) |
| this.selector = (this.options.target |
| || ((href = $(element).attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7 |
| || '') + ' .nav li > a' |
| this.$body = $('body').on('click.scroll.data-api', this.selector, process) |
| this.refresh() |
| this.process() |
| } |
| |
| ScrollSpy.prototype = { |
| |
| constructor: ScrollSpy |
| |
| , refresh: function () { |
| this.targets = this.$body |
| .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 $(id).position().top |
| }) |
| } |
| |
| , process: function () { |
| var scrollTop = this.$scrollElement.scrollTop() + this.options.offset |
| , 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.$body |
| .find(this.selector).parent('.active') |
| .removeClass('active') |
| |
| active = this.$body |
| .find(this.selector + '[href="' + target + '"]') |
| .parent('li') |
| .addClass('active') |
| |
| if ( active.parent('.dropdown-menu') ) { |
| active.closest('li.dropdown').addClass('active') |
| } |
| } |
| |
| } |
| |
| |
| /* SCROLLSPY PLUGIN DEFINITION |
| * =========================== */ |
| |
| $.fn.scrollspy = function ( option ) { |
| return this.each(function () { |
| var $this = $(this) |
| , data = $this.data('scrollspy') |
| , options = typeof option == 'object' && option |
| if (!data) $this.data('scrollspy', (data = new ScrollSpy(this, options))) |
| if (typeof option == 'string') data[option]() |
| }) |
| } |
| |
| $.fn.scrollspy.Constructor = ScrollSpy |
| |
| $.fn.scrollspy.defaults = { |
| offset: 10 |
| } |
| |
| |
| /* SCROLLSPY DATA-API |
| * ================== */ |
| |
| $(function () { |
| $('[data-spy="scroll"]').each(function () { |
| var $spy = $(this) |
| $spy.scrollspy($spy.data()) |
| }) |
| }) |
| |
| }( window.jQuery ) |
