scratch – Blame information for rev 134
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Rev | Author | Line No. | Line |
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134 | office | 1 | /* ======================================================================== |
2 | * Bootstrap: scrollspy.js v3.1.1 |
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3 | * http://getbootstrap.com/javascript/#scrollspy |
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4 | * ======================================================================== |
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5 | * Copyright 2011-2014 Twitter, Inc. |
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6 | * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) |
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7 | * ======================================================================== */ |
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8 | |||
9 | |||
10 | +function ($) { |
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11 | 'use strict'; |
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12 | |||
13 | // SCROLLSPY CLASS DEFINITION |
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14 | // ========================== |
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15 | |||
16 | function ScrollSpy(element, options) { |
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17 | var href |
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18 | var process = $.proxy(this.process, this) |
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19 | |||
20 | this.$element = $(element).is('body') ? $(window) : $(element) |
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21 | this.$body = $('body') |
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22 | this.$scrollElement = this.$element.on('scroll.bs.scroll-spy.data-api', process) |
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23 | this.options = $.extend({}, ScrollSpy.DEFAULTS, options) |
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24 | this.selector = (this.options.target |
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25 | || ((href = $(element).attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7 |
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26 | || '') + ' .nav li > a' |
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27 | this.offsets = $([]) |
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28 | this.targets = $([]) |
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29 | this.activeTarget = null |
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30 | |||
31 | this.refresh() |
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32 | this.process() |
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33 | } |
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34 | |||
35 | ScrollSpy.DEFAULTS = { |
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36 | offset: 10 |
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37 | } |
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38 | |||
39 | ScrollSpy.prototype.refresh = function () { |
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40 | var offsetMethod = this.$element[0] == window ? 'offset' : 'position' |
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41 | |||
42 | this.offsets = $([]) |
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43 | this.targets = $([]) |
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44 | |||
45 | var self = this |
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46 | var $targets = this.$body |
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47 | .find(this.selector) |
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48 | .map(function () { |
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49 | var $el = $(this) |
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50 | var href = $el.data('target') || $el.attr('href') |
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51 | var $href = /^#./.test(href) && $(href) |
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52 | |||
53 | return ($href |
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54 | && $href.length |
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55 | && $href.is(':visible') |
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56 | && [[ $href[offsetMethod]().top + (!$.isWindow(self.$scrollElement.get(0)) && self.$scrollElement.scrollTop()), href ]]) || null |
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57 | }) |
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58 | .sort(function (a, b) { return a[0] - b[0] }) |
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59 | .each(function () { |
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60 | self.offsets.push(this[0]) |
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61 | self.targets.push(this[1]) |
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62 | }) |
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63 | } |
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64 | |||
65 | ScrollSpy.prototype.process = function () { |
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66 | var scrollTop = this.$scrollElement.scrollTop() + this.options.offset |
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67 | var scrollHeight = this.$scrollElement[0].scrollHeight || this.$body[0].scrollHeight |
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68 | var maxScroll = scrollHeight - this.$scrollElement.height() |
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69 | var offsets = this.offsets |
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70 | var targets = this.targets |
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71 | var activeTarget = this.activeTarget |
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72 | var i |
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73 | |||
74 | if (scrollTop >= maxScroll) { |
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75 | return activeTarget != (i = targets.last()[0]) && this.activate(i) |
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76 | } |
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77 | |||
78 | if (activeTarget && scrollTop <= offsets[0]) { |
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79 | return activeTarget != (i = targets[0]) && this.activate(i) |
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80 | } |
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81 | |||
82 | for (i = offsets.length; i--;) { |
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83 | activeTarget != targets[i] |
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84 | && scrollTop >= offsets[i] |
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85 | && (!offsets[i + 1] || scrollTop <= offsets[i + 1]) |
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86 | && this.activate( targets[i] ) |
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87 | } |
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88 | } |
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89 | |||
90 | ScrollSpy.prototype.activate = function (target) { |
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91 | this.activeTarget = target |
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92 | |||
93 | $(this.selector) |
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94 | .parentsUntil(this.options.target, '.active') |
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95 | .removeClass('active') |
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96 | |||
97 | var selector = this.selector + |
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98 | '[data-target="' + target + '"],' + |
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99 | this.selector + '[href="' + target + '"]' |
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100 | |||
101 | var active = $(selector) |
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102 | .parents('li') |
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103 | .addClass('active') |
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104 | |||
105 | if (active.parent('.dropdown-menu').length) { |
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106 | active = active |
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107 | .closest('li.dropdown') |
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108 | .addClass('active') |
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109 | } |
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110 | |||
111 | active.trigger('activate.bs.scrollspy') |
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112 | } |
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113 | |||
114 | |||
115 | // SCROLLSPY PLUGIN DEFINITION |
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116 | // =========================== |
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117 | |||
118 | var old = $.fn.scrollspy |
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119 | |||
120 | $.fn.scrollspy = function (option) { |
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121 | return this.each(function () { |
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122 | var $this = $(this) |
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123 | var data = $this.data('bs.scrollspy') |
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124 | var options = typeof option == 'object' && option |
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125 | |||
126 | if (!data) $this.data('bs.scrollspy', (data = new ScrollSpy(this, options))) |
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127 | if (typeof option == 'string') data[option]() |
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128 | }) |
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129 | } |
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130 | |||
131 | $.fn.scrollspy.Constructor = ScrollSpy |
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132 | |||
133 | |||
134 | // SCROLLSPY NO CONFLICT |
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135 | // ===================== |
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136 | |||
137 | $.fn.scrollspy.noConflict = function () { |
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138 | $.fn.scrollspy = old |
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139 | return this |
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140 | } |
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141 | |||
142 | |||
143 | // SCROLLSPY DATA-API |
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144 | // ================== |
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145 | |||
146 | $(window).on('load', function () { |
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147 | $('[data-spy="scroll"]').each(function () { |
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148 | var $spy = $(this) |
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149 | $spy.scrollspy($spy.data()) |
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150 | }) |
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151 | }) |
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152 | |||
153 | }(jQuery); |