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@@ -0,0 +1,162 @@
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+/* ========================================================================
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+ * Bootstrap: affix.js v3.3.7
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+ * http://getbootstrap.com/javascript/#affix
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+ * ========================================================================
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+ * Copyright 2011-2016 Twitter, Inc.
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+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
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+ * ======================================================================== */
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+
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+
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++function ($) {
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+ 'use strict';
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+
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+ // AFFIX CLASS DEFINITION
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+ // ======================
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+
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+ var Affix = function (element, options) {
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+ this.options = $.extend({}, Affix.DEFAULTS, options)
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+
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+ this.$target = $(this.options.target)
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+ .on('scroll.bs.affix.data-api', $.proxy(this.checkPosition, this))
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+ .on('click.bs.affix.data-api', $.proxy(this.checkPositionWithEventLoop, this))
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+
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+ this.$element = $(element)
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+ this.affixed = null
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+ this.unpin = null
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+ this.pinnedOffset = null
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+
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+ this.checkPosition()
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+ }
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+
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+ Affix.VERSION = '3.3.7'
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+
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+ Affix.RESET = 'affix affix-top affix-bottom'
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+
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+ Affix.DEFAULTS = {
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+ offset: 0,
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+ target: window
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+ }
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+
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+ Affix.prototype.getState = function (scrollHeight, height, offsetTop, offsetBottom) {
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+ var scrollTop = this.$target.scrollTop()
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+ var position = this.$element.offset()
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+ var targetHeight = this.$target.height()
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+
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+ if (offsetTop != null && this.affixed == 'top') return scrollTop < offsetTop ? 'top' : false
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+
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+ if (this.affixed == 'bottom') {
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+ if (offsetTop != null) return (scrollTop + this.unpin <= position.top) ? false : 'bottom'
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+ return (scrollTop + targetHeight <= scrollHeight - offsetBottom) ? false : 'bottom'
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+ }
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+
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+ var initializing = this.affixed == null
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+ var colliderTop = initializing ? scrollTop : position.top
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+ var colliderHeight = initializing ? targetHeight : height
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+
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+ if (offsetTop != null && scrollTop <= offsetTop) return 'top'
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+ if (offsetBottom != null && (colliderTop + colliderHeight >= scrollHeight - offsetBottom)) return 'bottom'
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+
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+ return false
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+ }
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+
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+ Affix.prototype.getPinnedOffset = function () {
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+ if (this.pinnedOffset) return this.pinnedOffset
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+ this.$element.removeClass(Affix.RESET).addClass('affix')
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+ var scrollTop = this.$target.scrollTop()
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+ var position = this.$element.offset()
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+ return (this.pinnedOffset = position.top - scrollTop)
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+ }
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+
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+ Affix.prototype.checkPositionWithEventLoop = function () {
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+ setTimeout($.proxy(this.checkPosition, this), 1)
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+ }
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+
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+ Affix.prototype.checkPosition = function () {
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+ if (!this.$element.is(':visible')) return
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+
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+ var height = this.$element.height()
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+ var offset = this.options.offset
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+ var offsetTop = offset.top
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+ var offsetBottom = offset.bottom
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+ var scrollHeight = Math.max($(document).height(), $(document.body).height())
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+
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+ if (typeof offset != 'object') offsetBottom = offsetTop = offset
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+ if (typeof offsetTop == 'function') offsetTop = offset.top(this.$element)
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+ if (typeof offsetBottom == 'function') offsetBottom = offset.bottom(this.$element)
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+
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+ var affix = this.getState(scrollHeight, height, offsetTop, offsetBottom)
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+
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+ if (this.affixed != affix) {
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+ if (this.unpin != null) this.$element.css('top', '')
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+
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+ var affixType = 'affix' + (affix ? '-' + affix : '')
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+ var e = $.Event(affixType + '.bs.affix')
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+
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+ this.$element.trigger(e)
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+
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+ if (e.isDefaultPrevented()) return
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+
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+ this.affixed = affix
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+ this.unpin = affix == 'bottom' ? this.getPinnedOffset() : null
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+
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+ this.$element
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+ .removeClass(Affix.RESET)
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+ .addClass(affixType)
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+ .trigger(affixType.replace('affix', 'affixed') + '.bs.affix')
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+ }
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+
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+ if (affix == 'bottom') {
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+ this.$element.offset({
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+ top: scrollHeight - height - offsetBottom
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+ })
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+ }
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+ }
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+
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+
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+ // AFFIX PLUGIN DEFINITION
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+ // =======================
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+
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+ function Plugin(option) {
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+ return this.each(function () {
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+ var $this = $(this)
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+ var data = $this.data('bs.affix')
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+ var options = typeof option == 'object' && option
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+
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+ if (!data) $this.data('bs.affix', (data = new Affix(this, options)))
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+ if (typeof option == 'string') data[option]()
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+ })
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+ }
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+
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+ var old = $.fn.affix
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+
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+ $.fn.affix = Plugin
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+ $.fn.affix.Constructor = Affix
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+
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+
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+ // AFFIX NO CONFLICT
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+ // =================
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+
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+ $.fn.affix.noConflict = function () {
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+ $.fn.affix = old
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+ return this
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+ }
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+
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+
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+ // AFFIX DATA-API
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+ // ==============
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+
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+ $(window).on('load', function () {
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+ $('[data-spy="affix"]').each(function () {
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+ var $spy = $(this)
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+ var data = $spy.data()
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+
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+ data.offset = data.offset || {}
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+
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+ if (data.offsetBottom != null) data.offset.bottom = data.offsetBottom
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+ if (data.offsetTop != null) data.offset.top = data.offsetTop
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+
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+ Plugin.call($spy, data)
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+ })
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+ })
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+
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+}(jQuery);
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James Iter