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annotate 3rdparty/bootstrap/js/bootstrap-affix.js @ 5132:0142b4fb5a2d

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issue2550648 - partial fix for problem in this issue. Ezio Melotti reported that the expression editor allowed the user to generate an expression using retired values. To align the expression editor with the simple dropdown search item, retired values are now removed from the expression editor. Do we really want this though? Supposed a keyword is retired and I want to search for an issue with that retired keyword? Do we have a best policy document that says to remove retired keywords from all places it could possibly be used? It could be argued that the simple search dropdown is wrong and should allow selecting retired values.
author John Rouillard <rouilj@ieee.org>
date Fri, 08 Jul 2016 19:31:02 -0400
parents c109f7c1e477
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4854
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1 /* ==========================================================
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2 * bootstrap-affix.js v2.2.2
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3 * http://twitter.github.com/bootstrap/javascript.html#affix
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4 * ==========================================================
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5 * Copyright 2012 Twitter, Inc.
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6 *
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7 * Licensed under the Apache License, Version 2.0 (the "License");
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8 * you may not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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10 *
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11 * http://www.apache.org/licenses/LICENSE-2.0
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12 *
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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18 * ========================================================== */
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19
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20
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21 !function ($) {
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22
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23 "use strict"; // jshint ;_;
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24
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25
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26 /* AFFIX CLASS DEFINITION
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27 * ====================== */
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28
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29 var Affix = function (element, options) {
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30 this.options = $.extend({}, $.fn.affix.defaults, options)
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31 this.$window = $(window)
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32 .on('scroll.affix.data-api', $.proxy(this.checkPosition, this))
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33 .on('click.affix.data-api', $.proxy(function () { setTimeout($.proxy(this.checkPosition, this), 1) }, this))
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34 this.$element = $(element)
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35 this.checkPosition()
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36 }
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37
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38 Affix.prototype.checkPosition = function () {
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39 if (!this.$element.is(':visible')) return
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40
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41 var scrollHeight = $(document).height()
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42 , scrollTop = this.$window.scrollTop()
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43 , position = this.$element.offset()
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44 , offset = this.options.offset
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45 , offsetBottom = offset.bottom
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46 , offsetTop = offset.top
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47 , reset = 'affix affix-top affix-bottom'
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48 , affix
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49
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50 if (typeof offset != 'object') offsetBottom = offsetTop = offset
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51 if (typeof offsetTop == 'function') offsetTop = offset.top()
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52 if (typeof offsetBottom == 'function') offsetBottom = offset.bottom()
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53
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54 affix = this.unpin != null && (scrollTop + this.unpin <= position.top) ?
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55 false : offsetBottom != null && (position.top + this.$element.height() >= scrollHeight - offsetBottom) ?
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56 'bottom' : offsetTop != null && scrollTop <= offsetTop ?
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57 'top' : false
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58
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59 if (this.affixed === affix) return
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60
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61 this.affixed = affix
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62 this.unpin = affix == 'bottom' ? position.top - scrollTop : null
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63
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64 this.$element.removeClass(reset).addClass('affix' + (affix ? '-' + affix : ''))
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65 }
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66
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67
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68 /* AFFIX PLUGIN DEFINITION
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69 * ======================= */
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70
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71 var old = $.fn.affix
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72
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73 $.fn.affix = function (option) {
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74 return this.each(function () {
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75 var $this = $(this)
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76 , data = $this.data('affix')
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77 , options = typeof option == 'object' && option
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78 if (!data) $this.data('affix', (data = new Affix(this, options)))
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79 if (typeof option == 'string') data[option]()
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80 })
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81 }
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82
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83 $.fn.affix.Constructor = Affix
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84
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85 $.fn.affix.defaults = {
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86 offset: 0
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87 }
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88
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89
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90 /* AFFIX NO CONFLICT
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91 * ================= */
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92
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93 $.fn.affix.noConflict = function () {
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94 $.fn.affix = old
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95 return this
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96 }
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97
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98
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99 /* AFFIX DATA-API
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100 * ============== */
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101
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102 $(window).on('load', function () {
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103 $('[data-spy="affix"]').each(function () {
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104 var $spy = $(this)
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105 , data = $spy.data()
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106
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107 data.offset = data.offset || {}
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108
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109 data.offsetBottom && (data.offset.bottom = data.offsetBottom)
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110 data.offsetTop && (data.offset.top = data.offsetTop)
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111
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112 $spy.affix(data)
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113 })
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114 })
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115
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116
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117 }(window.jQuery);
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