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updated bootstrapped to twitter bootstrap 2.1.0
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Nicholas Watson
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Aug 31, 2012
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/* ========================================================== | ||
* bootstrap-affix.js v2.1.0 | ||
* http://twitter.github.com/bootstrap/javascript.html#affix | ||
* ========================================================== | ||
* 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. | ||
* ========================================================== */ | ||
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!function ($) { | ||
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"use strict"; // jshint ;_; | ||
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/* AFFIX CLASS DEFINITION | ||
* ====================== */ | ||
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var Affix = function (element, options) { | ||
this.options = $.extend({}, $.fn.affix.defaults, options) | ||
this.$window = $(window).on('scroll.affix.data-api', $.proxy(this.checkPosition, this)) | ||
this.$element = $(element) | ||
this.checkPosition() | ||
} | ||
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Affix.prototype.checkPosition = function () { | ||
if (!this.$element.is(':visible')) return | ||
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var scrollHeight = $(document).height() | ||
, scrollTop = this.$window.scrollTop() | ||
, position = this.$element.offset() | ||
, offset = this.options.offset | ||
, offsetBottom = offset.bottom | ||
, offsetTop = offset.top | ||
, reset = 'affix affix-top affix-bottom' | ||
, affix | ||
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if (typeof offset != 'object') offsetBottom = offsetTop = offset | ||
if (typeof offsetTop == 'function') offsetTop = offset.top() | ||
if (typeof offsetBottom == 'function') offsetBottom = offset.bottom() | ||
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affix = this.unpin != null && (scrollTop + this.unpin <= position.top) ? | ||
false : offsetBottom != null && (position.top + this.$element.height() >= scrollHeight - offsetBottom) ? | ||
'bottom' : offsetTop != null && scrollTop <= offsetTop ? | ||
'top' : false | ||
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if (this.affixed === affix) return | ||
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this.affixed = affix | ||
this.unpin = affix == 'bottom' ? position.top - scrollTop : null | ||
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this.$element.removeClass(reset).addClass('affix' + (affix ? '-' + affix : '')) | ||
} | ||
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/* AFFIX PLUGIN DEFINITION | ||
* ======================= */ | ||
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$.fn.affix = function (option) { | ||
return this.each(function () { | ||
var $this = $(this) | ||
, data = $this.data('affix') | ||
, options = typeof option == 'object' && option | ||
if (!data) $this.data('affix', (data = new Affix(this, options))) | ||
if (typeof option == 'string') data[option]() | ||
}) | ||
} | ||
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$.fn.affix.Constructor = Affix | ||
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$.fn.affix.defaults = { | ||
offset: 0 | ||
} | ||
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/* AFFIX DATA-API | ||
* ============== */ | ||
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$(window).on('load', function () { | ||
$('[data-spy="affix"]').each(function () { | ||
var $spy = $(this) | ||
, data = $spy.data() | ||
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data.offset = data.offset || {} | ||
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data.offsetBottom && (data.offset.bottom = data.offsetBottom) | ||
data.offsetTop && (data.offset.top = data.offsetTop) | ||
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$spy.affix(data) | ||
}) | ||
}) | ||
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}(window.jQuery); |
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