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+/* ============================================================= |
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+ * bootstrap-scrollspy.js v1.4.0 |
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+ * http://twitter.github.com/bootstrap/javascript.html#scrollspy |
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+ * ============================================================= |
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+ * Copyright 2011 Twitter, Inc. |
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+ * |
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+ * Licensed under the Apache License, Version 2.0 (the "License"); |
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+ * you may not use this file except in compliance with the License. |
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+ * You may obtain a copy of the License at |
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+ * |
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+ * http://www.apache.org/licenses/LICENSE-2.0 |
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+ * |
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+ * Unless required by applicable law or agreed to in writing, software |
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+ * distributed under the License is distributed on an "AS IS" BASIS, |
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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+ * See the License for the specific language governing permissions and |
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+ * limitations under the License. |
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+ * ============================================================== */ |
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+ |
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+ |
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+!function ( $ ) { |
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+ |
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+ "use strict" |
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+ |
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+ var $window = $(window) |
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+ |
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+ function ScrollSpy( topbar, selector ) { |
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+ var processScroll = $.proxy(this.processScroll, this) |
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+ this.$topbar = $(topbar) |
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+ this.selector = selector || 'li > a' |
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+ this.refresh() |
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+ this.$topbar.delegate(this.selector, 'click', processScroll) |
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+ $window.scroll(processScroll) |
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+ this.processScroll() |
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+ } |
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+ |
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+ ScrollSpy.prototype = { |
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+ |
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+ refresh: function () { |
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+ this.targets = this.$topbar.find(this.selector).map(function () { |
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+ var href = $(this).attr('href') |
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+ return /^#\w/.test(href) && $(href).length ? href : null |
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+ }) |
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+ |
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+ this.offsets = $.map(this.targets, function (id) { |
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+ return $(id).offset().top |
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+ }) |
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+ } |
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+ |
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+ , processScroll: function () { |
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+ var scrollTop = $window.scrollTop() + 10 |
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+ , offsets = this.offsets |
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+ , targets = this.targets |
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+ , activeTarget = this.activeTarget |
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+ , i |
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+ |
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+ for (i = offsets.length; i--;) { |
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+ activeTarget != targets[i] |
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+ && scrollTop >= offsets[i] |
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+ && (!offsets[i + 1] || scrollTop <= offsets[i + 1]) |
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+ && this.activateButton( targets[i] ) |
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+ } |
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+ } |
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+ |
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+ , activateButton: function (target) { |
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+ this.activeTarget = target |
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+ |
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+ this.$topbar |
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+ .find(this.selector).parent('.active') |
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+ .removeClass('active') |
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+ |
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+ this.$topbar |
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+ .find(this.selector + '[href="' + target + '"]') |
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+ .parent('li') |
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+ .addClass('active') |
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+ } |
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+ |
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+ } |
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+ |
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+ /* SCROLLSPY PLUGIN DEFINITION |
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+ * =========================== */ |
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+ |
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+ $.fn.scrollSpy = function( options ) { |
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+ var scrollspy = this.data('scrollspy') |
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+ |
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+ if (!scrollspy) { |
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+ return this.each(function () { |
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+ $(this).data('scrollspy', new ScrollSpy( this, options )) |
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+ }) |
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+ } |
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+ |
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+ if ( options === true ) { |
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+ return scrollspy |
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+ } |
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+ |
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+ if ( typeof options == 'string' ) { |
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+ scrollspy[options]() |
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+ } |
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+ |
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+ return this |
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+ } |
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+ |
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+ $(document).ready(function () { |
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+ $('body').scrollSpy('[data-scrollspy] li > a') |
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+ }) |
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+ |
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+}( window.jQuery || window.ender ); |
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\ No newline at end of file |