source: trip-planner-front/node_modules/bootstrap/js/affix.js@ eed0bf8

Last change on this file since eed0bf8 was fa375fe, checked in by Ema <ema_spirova@…>, 3 years ago

adding new components

  • Property mode set to 100644
File size: 4.8 KB
Line 
1/* ========================================================================
2 * Bootstrap: affix.js v3.4.1
3 * https://getbootstrap.com/docs/3.4/javascript/#affix
4 * ========================================================================
5 * Copyright 2011-2019 Twitter, Inc.
6 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
7 * ======================================================================== */
8
9
10+function ($) {
11 'use strict';
12
13 // AFFIX CLASS DEFINITION
14 // ======================
15
16 var Affix = function (element, options) {
17 this.options = $.extend({}, Affix.DEFAULTS, options)
18
19 var target = this.options.target === Affix.DEFAULTS.target ? $(this.options.target) : $(document).find(this.options.target)
20
21 this.$target = target
22 .on('scroll.bs.affix.data-api', $.proxy(this.checkPosition, this))
23 .on('click.bs.affix.data-api', $.proxy(this.checkPositionWithEventLoop, this))
24
25 this.$element = $(element)
26 this.affixed = null
27 this.unpin = null
28 this.pinnedOffset = null
29
30 this.checkPosition()
31 }
32
33 Affix.VERSION = '3.4.1'
34
35 Affix.RESET = 'affix affix-top affix-bottom'
36
37 Affix.DEFAULTS = {
38 offset: 0,
39 target: window
40 }
41
42 Affix.prototype.getState = function (scrollHeight, height, offsetTop, offsetBottom) {
43 var scrollTop = this.$target.scrollTop()
44 var position = this.$element.offset()
45 var targetHeight = this.$target.height()
46
47 if (offsetTop != null && this.affixed == 'top') return scrollTop < offsetTop ? 'top' : false
48
49 if (this.affixed == 'bottom') {
50 if (offsetTop != null) return (scrollTop + this.unpin <= position.top) ? false : 'bottom'
51 return (scrollTop + targetHeight <= scrollHeight - offsetBottom) ? false : 'bottom'
52 }
53
54 var initializing = this.affixed == null
55 var colliderTop = initializing ? scrollTop : position.top
56 var colliderHeight = initializing ? targetHeight : height
57
58 if (offsetTop != null && scrollTop <= offsetTop) return 'top'
59 if (offsetBottom != null && (colliderTop + colliderHeight >= scrollHeight - offsetBottom)) return 'bottom'
60
61 return false
62 }
63
64 Affix.prototype.getPinnedOffset = function () {
65 if (this.pinnedOffset) return this.pinnedOffset
66 this.$element.removeClass(Affix.RESET).addClass('affix')
67 var scrollTop = this.$target.scrollTop()
68 var position = this.$element.offset()
69 return (this.pinnedOffset = position.top - scrollTop)
70 }
71
72 Affix.prototype.checkPositionWithEventLoop = function () {
73 setTimeout($.proxy(this.checkPosition, this), 1)
74 }
75
76 Affix.prototype.checkPosition = function () {
77 if (!this.$element.is(':visible')) return
78
79 var height = this.$element.height()
80 var offset = this.options.offset
81 var offsetTop = offset.top
82 var offsetBottom = offset.bottom
83 var scrollHeight = Math.max($(document).height(), $(document.body).height())
84
85 if (typeof offset != 'object') offsetBottom = offsetTop = offset
86 if (typeof offsetTop == 'function') offsetTop = offset.top(this.$element)
87 if (typeof offsetBottom == 'function') offsetBottom = offset.bottom(this.$element)
88
89 var affix = this.getState(scrollHeight, height, offsetTop, offsetBottom)
90
91 if (this.affixed != affix) {
92 if (this.unpin != null) this.$element.css('top', '')
93
94 var affixType = 'affix' + (affix ? '-' + affix : '')
95 var e = $.Event(affixType + '.bs.affix')
96
97 this.$element.trigger(e)
98
99 if (e.isDefaultPrevented()) return
100
101 this.affixed = affix
102 this.unpin = affix == 'bottom' ? this.getPinnedOffset() : null
103
104 this.$element
105 .removeClass(Affix.RESET)
106 .addClass(affixType)
107 .trigger(affixType.replace('affix', 'affixed') + '.bs.affix')
108 }
109
110 if (affix == 'bottom') {
111 this.$element.offset({
112 top: scrollHeight - height - offsetBottom
113 })
114 }
115 }
116
117
118 // AFFIX PLUGIN DEFINITION
119 // =======================
120
121 function Plugin(option) {
122 return this.each(function () {
123 var $this = $(this)
124 var data = $this.data('bs.affix')
125 var options = typeof option == 'object' && option
126
127 if (!data) $this.data('bs.affix', (data = new Affix(this, options)))
128 if (typeof option == 'string') data[option]()
129 })
130 }
131
132 var old = $.fn.affix
133
134 $.fn.affix = Plugin
135 $.fn.affix.Constructor = Affix
136
137
138 // AFFIX NO CONFLICT
139 // =================
140
141 $.fn.affix.noConflict = function () {
142 $.fn.affix = old
143 return this
144 }
145
146
147 // AFFIX DATA-API
148 // ==============
149
150 $(window).on('load', function () {
151 $('[data-spy="affix"]').each(function () {
152 var $spy = $(this)
153 var data = $spy.data()
154
155 data.offset = data.offset || {}
156
157 if (data.offsetBottom != null) data.offset.bottom = data.offsetBottom
158 if (data.offsetTop != null) data.offset.top = data.offsetTop
159
160 Plugin.call($spy, data)
161 })
162 })
163
164}(jQuery);
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