Created
February 27, 2012 09:22
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Modified bootstrap-scrollspy.js to support horizontal scroll.
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/* ============================================================= | |
* bootstrap-scrollspy.js v2.0.1 | |
* 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 $(id).position().left | |
}) | |
} | |
, process: function () { | |
var scrollLeft = this.$scrollElement.scrollLeft() + this.options.offset | |
, offsets = this.offsets | |
, targets = this.targets | |
, activeTarget = this.activeTarget | |
, i | |
for (i = offsets.length; i--;) { | |
activeTarget != targets[i] | |
&& scrollLeft >= offsets[i] | |
&& (!offsets[i + 1] || scrollLeft <= 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 ); |
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Any advice for usage of this? The vertical version is working fine for me but I can't get this horizontal version to work :-/