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File: vendors/bootstrap/js/affix.js

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File: vendors/bootstrap/js/affix.js
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: Gentelella BladeOne
Render templates using Bootstrap for presentation
Author: By
Last change:
Date: 3 years ago
Size: 4,838 bytes
 

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/* ======================================================================== * Bootstrap: affix.js v3.3.6 * http://getbootstrap.com/javascript/#affix * ======================================================================== * Copyright 2011-2015 Twitter, Inc. * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * ======================================================================== */ +function ($) { 'use strict'; // AFFIX CLASS DEFINITION // ====================== var Affix = function (element, options) { this.options = $.extend({}, Affix.DEFAULTS, options) this.$target = $(this.options.target) .on('scroll.bs.affix.data-api', $.proxy(this.checkPosition, this)) .on('click.bs.affix.data-api', $.proxy(this.checkPositionWithEventLoop, this)) this.$element = $(element) this.affixed = null this.unpin = null this.pinnedOffset = null this.checkPosition() } Affix.VERSION = '3.3.6' Affix.RESET = 'affix affix-top affix-bottom' Affix.DEFAULTS = { offset: 0, target: window } Affix.prototype.getState = function (scrollHeight, height, offsetTop, offsetBottom) { var scrollTop = this.$target.scrollTop() var position = this.$element.offset() var targetHeight = this.$target.height() if (offsetTop != null && this.affixed == 'top') return scrollTop < offsetTop ? 'top' : false if (this.affixed == 'bottom') { if (offsetTop != null) return (scrollTop + this.unpin <= position.top) ? false : 'bottom' return (scrollTop + targetHeight <= scrollHeight - offsetBottom) ? false : 'bottom' } var initializing = this.affixed == null var colliderTop = initializing ? scrollTop : position.top var colliderHeight = initializing ? targetHeight : height if (offsetTop != null && scrollTop <= offsetTop) return 'top' if (offsetBottom != null && (colliderTop + colliderHeight >= scrollHeight - offsetBottom)) return 'bottom' return false } Affix.prototype.getPinnedOffset = function () { if (this.pinnedOffset) return this.pinnedOffset this.$element.removeClass(Affix.RESET).addClass('affix') var scrollTop = this.$target.scrollTop() var position = this.$element.offset() return (this.pinnedOffset = position.top - scrollTop) } Affix.prototype.checkPositionWithEventLoop = function () { setTimeout($.proxy(this.checkPosition, this), 1) } Affix.prototype.checkPosition = function () { if (!this.$element.is(':visible')) return var height = this.$element.height() var offset = this.options.offset var offsetTop = offset.top var offsetBottom = offset.bottom var scrollHeight = Math.max($(document).height(), $(document.body).height()) if (typeof offset != 'object') offsetBottom = offsetTop = offset if (typeof offsetTop == 'function') offsetTop = offset.top(this.$element) if (typeof offsetBottom == 'function') offsetBottom = offset.bottom(this.$element) var affix = this.getState(scrollHeight, height, offsetTop, offsetBottom) if (this.affixed != affix) { if (this.unpin != null) this.$element.css('top', '') var affixType = 'affix' + (affix ? '-' + affix : '') var e = $.Event(affixType + '.bs.affix') this.$element.trigger(e) if (e.isDefaultPrevented()) return this.affixed = affix this.unpin = affix == 'bottom' ? this.getPinnedOffset() : null this.$element .removeClass(Affix.RESET) .addClass(affixType) .trigger(affixType.replace('affix', 'affixed') + '.bs.affix') } if (affix == 'bottom') { this.$element.offset({ top: scrollHeight - height - offsetBottom }) } } // AFFIX PLUGIN DEFINITION // ======================= function Plugin(option) { return this.each(function () { var $this = $(this) var data = $this.data('bs.affix') var options = typeof option == 'object' && option if (!data) $this.data('bs.affix', (data = new Affix(this, options))) if (typeof option == 'string') data[option]() }) } var old = $.fn.affix $.fn.affix = Plugin $.fn.affix.Constructor = Affix // AFFIX NO CONFLICT // ================= $.fn.affix.noConflict = function () { $.fn.affix = old return this } // AFFIX DATA-API // ============== $(window).on('load', function () { $('[data-spy="affix"]').each(function () { var $spy = $(this) var data = $spy.data() data.offset = data.offset || {} if (data.offsetBottom != null) data.offset.bottom = data.offsetBottom if (data.offsetTop != null) data.offset.top = data.offsetTop Plugin.call($spy, data) }) }) }(jQuery);