[fa375fe] | 1 | /* ========================================================================
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| 2 | * Bootstrap: scrollspy.js v3.4.1
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| 3 | * https://getbootstrap.com/docs/3.4/javascript/#scrollspy
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| 4 | * ========================================================================
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| 5 | * Copyright 2011-2019 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 |
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| 9 |
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| 10 | +function ($) {
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| 11 | 'use strict';
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| 12 |
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| 13 | // SCROLLSPY CLASS DEFINITION
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| 14 | // ==========================
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| 15 |
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| 16 | function ScrollSpy(element, options) {
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| 17 | this.$body = $(document.body)
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| 18 | this.$scrollElement = $(element).is(document.body) ? $(window) : $(element)
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| 19 | this.options = $.extend({}, ScrollSpy.DEFAULTS, options)
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| 20 | this.selector = (this.options.target || '') + ' .nav li > a'
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| 21 | this.offsets = []
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| 22 | this.targets = []
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| 23 | this.activeTarget = null
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| 24 | this.scrollHeight = 0
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| 25 |
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| 26 | this.$scrollElement.on('scroll.bs.scrollspy', $.proxy(this.process, this))
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| 27 | this.refresh()
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| 28 | this.process()
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| 29 | }
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| 30 |
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| 31 | ScrollSpy.VERSION = '3.4.1'
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| 32 |
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| 33 | ScrollSpy.DEFAULTS = {
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| 34 | offset: 10
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| 35 | }
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| 36 |
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| 37 | ScrollSpy.prototype.getScrollHeight = function () {
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| 38 | return this.$scrollElement[0].scrollHeight || Math.max(this.$body[0].scrollHeight, document.documentElement.scrollHeight)
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| 39 | }
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| 40 |
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| 41 | ScrollSpy.prototype.refresh = function () {
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| 42 | var that = this
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| 43 | var offsetMethod = 'offset'
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| 44 | var offsetBase = 0
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| 45 |
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| 46 | this.offsets = []
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| 47 | this.targets = []
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| 48 | this.scrollHeight = this.getScrollHeight()
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| 49 |
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| 50 | if (!$.isWindow(this.$scrollElement[0])) {
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| 51 | offsetMethod = 'position'
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| 52 | offsetBase = this.$scrollElement.scrollTop()
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| 53 | }
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| 54 |
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| 55 | this.$body
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| 56 | .find(this.selector)
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| 57 | .map(function () {
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| 58 | var $el = $(this)
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| 59 | var href = $el.data('target') || $el.attr('href')
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| 60 | var $href = /^#./.test(href) && $(href)
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| 61 |
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| 62 | return ($href
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| 63 | && $href.length
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| 64 | && $href.is(':visible')
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| 65 | && [[$href[offsetMethod]().top + offsetBase, href]]) || null
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| 66 | })
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| 67 | .sort(function (a, b) { return a[0] - b[0] })
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| 68 | .each(function () {
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| 69 | that.offsets.push(this[0])
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| 70 | that.targets.push(this[1])
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| 71 | })
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| 72 | }
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| 73 |
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| 74 | ScrollSpy.prototype.process = function () {
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| 75 | var scrollTop = this.$scrollElement.scrollTop() + this.options.offset
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| 76 | var scrollHeight = this.getScrollHeight()
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| 77 | var maxScroll = this.options.offset + scrollHeight - this.$scrollElement.height()
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| 78 | var offsets = this.offsets
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| 79 | var targets = this.targets
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| 80 | var activeTarget = this.activeTarget
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| 81 | var i
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| 82 |
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| 83 | if (this.scrollHeight != scrollHeight) {
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| 84 | this.refresh()
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| 85 | }
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| 86 |
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| 87 | if (scrollTop >= maxScroll) {
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| 88 | return activeTarget != (i = targets[targets.length - 1]) && this.activate(i)
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| 89 | }
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| 90 |
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| 91 | if (activeTarget && scrollTop < offsets[0]) {
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| 92 | this.activeTarget = null
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| 93 | return this.clear()
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| 94 | }
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| 95 |
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| 96 | for (i = offsets.length; i--;) {
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| 97 | activeTarget != targets[i]
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| 98 | && scrollTop >= offsets[i]
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| 99 | && (offsets[i + 1] === undefined || scrollTop < offsets[i + 1])
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| 100 | && this.activate(targets[i])
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| 101 | }
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| 102 | }
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| 103 |
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| 104 | ScrollSpy.prototype.activate = function (target) {
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| 105 | this.activeTarget = target
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| 106 |
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| 107 | this.clear()
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| 108 |
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| 109 | var selector = this.selector +
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| 110 | '[data-target="' + target + '"],' +
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| 111 | this.selector + '[href="' + target + '"]'
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| 112 |
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| 113 | var active = $(selector)
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| 114 | .parents('li')
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| 115 | .addClass('active')
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| 116 |
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| 117 | if (active.parent('.dropdown-menu').length) {
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| 118 | active = active
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| 119 | .closest('li.dropdown')
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| 120 | .addClass('active')
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| 121 | }
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| 122 |
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| 123 | active.trigger('activate.bs.scrollspy')
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| 124 | }
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| 125 |
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| 126 | ScrollSpy.prototype.clear = function () {
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| 127 | $(this.selector)
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| 128 | .parentsUntil(this.options.target, '.active')
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| 129 | .removeClass('active')
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| 130 | }
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| 131 |
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| 132 |
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| 133 | // SCROLLSPY PLUGIN DEFINITION
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| 134 | // ===========================
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| 135 |
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| 136 | function Plugin(option) {
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| 137 | return this.each(function () {
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| 138 | var $this = $(this)
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| 139 | var data = $this.data('bs.scrollspy')
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| 140 | var options = typeof option == 'object' && option
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| 141 |
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| 142 | if (!data) $this.data('bs.scrollspy', (data = new ScrollSpy(this, options)))
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| 143 | if (typeof option == 'string') data[option]()
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| 144 | })
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| 145 | }
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| 146 |
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| 147 | var old = $.fn.scrollspy
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| 148 |
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| 149 | $.fn.scrollspy = Plugin
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| 150 | $.fn.scrollspy.Constructor = ScrollSpy
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| 151 |
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| 152 |
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| 153 | // SCROLLSPY NO CONFLICT
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| 154 | // =====================
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| 155 |
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| 156 | $.fn.scrollspy.noConflict = function () {
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| 157 | $.fn.scrollspy = old
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| 158 | return this
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| 159 | }
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| 160 |
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| 161 |
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| 162 | // SCROLLSPY DATA-API
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| 163 | // ==================
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| 164 |
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| 165 | $(window).on('load.bs.scrollspy.data-api', function () {
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| 166 | $('[data-spy="scroll"]').each(function () {
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| 167 | var $spy = $(this)
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| 168 | Plugin.call($spy, $spy.data())
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| 169 | })
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| 170 | })
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| 171 |
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| 172 | }(jQuery);
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