https://1st-tools.de/wp-content/plugins/shortcode-toc/assets/vendor/js/anchorific.js?ver=1.0.3

1/*
2	The MIT License (MIT)
3
4	Copyright (c) <2013> <Ren Aysha>
5
6	Permission is hereby granted, free of charge, to any person obtaining a copy
7	of this software and associated documentation files (the "Software"), to deal
8	in the Software without restriction, including without limitation the rights
9	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10	copies of the Software, and to permit persons to whom the Software is
11	furnished to do so, subject to the following conditions:
12
13	The above copyright notice and this permission notice shall be included in
14	all copies or substantial portions of the Software.
15
16	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22	THE SOFTWARE.
23*/
24
25if ( typeof Object.create !== 'function' ) {
26	Object.create = function( obj ) {
27		function F() {
28		}
29
30		F.prototype = obj;
31		return new F();
32	};
33}
34
35(function( $, window, document, undefined ) {
36	"use strict";
37
38	var Anchorific = {
39
40		init: function( options, elem ) {
41			var self = this;
42
43			self.elem = elem;
44			self.$elem = $( elem );
45
46			self.opt = $.extend( {}, this.opt, options );
47
48			self.headers = self.$elem.find( self.opt.headers );
49			self.previous = 0;
50
51			// Fix bug #1
52			if ( self.headers.length !== 0 ) {
53				self.first = parseInt( self.headers.prop( 'nodeName' ).substring( 1 ), null );
54			}
55
56			self.build();
57		},
58
59		opt: {
60			navigation: '.anchorific', // position of navigation
61			headers: 'h1, h2, h3, h4, h5, h6', // custom headers selector
62			speed: 200, // speed of sliding back to top
63			anchorClass: 'anchor', // class of anchor links
64			anchorText: '#', // prepended or appended to anchor headings
65			top: '.top', // back to top button or link class
66			spy: true, // scroll spy
67			position: 'append', // position of anchor text
68			spyOffset: ! 0 // specify heading offset for spy scrolling
69		},
70
71		build: function() {
72			var self = this, obj, navigations = function() {
73			};
74			// when navigation configuration is set
75			if ( self.opt.navigation ) {
76				$( self.opt.navigation ).append( '<ul />' );
77				self.previous = $( self.opt.navigation ).find( 'ul' ).last();
78				navigations = function( obj ) {
79					return self.navigations( obj );
80				};
81			}
82
83			for ( var i = 0; i < self.headers.length; i ++ ) {
84				obj = self.headers.eq( i );
85				navigations( obj );
86				self.anchor( obj );
87			}
88
89			if ( self.opt.spy ) {
90				self.spy();
91			}
92
93			if ( self.opt.top ) {
94				self.back();
95			}
96		},
97
98		navigations: function( obj ) {
99			var self = this, link, list, which, name = self.name( obj );
100
101			if ( obj.attr( 'id' ) !== undefined ) {
102				name = obj.attr( 'id' );
103			}
104
105			link = $( '<a />' ).attr( 'href', '#' + name ).text( obj.text() );
106			list = $( '<li />' ).append( link );
107
108			which = parseInt( obj.prop( 'nodeName' ).substring( 1 ), null );
109			list.attr( 'data-tag', which );
110
111			self.subheadings( which, list );
112
113			self.first = which;
114		},
115
116		subheadings: function( which, a ) {
117			var self = this, ul = $( self.opt.navigation ).find( 'ul' ),
118				li = $( self.opt.navigation ).find( 'li' );
119
120			if ( which === self.first ) {
121				self.previous.append( a );
122			} else if ( which > self.first ) {
123				li.last().append( '<ul />' );
124				// can't use cache ul; need to find ul once more
125				$( self.opt.navigation ).find( 'ul' ).last().append( a );
126				self.previous = a.parent();
127			} else {
128				$( 'li[data-tag=' + which + ']' ).last().parent().append( a );
129				self.previous = a.parent();
130			}
131		},
132
133		name: function( obj ) {
134			var name = obj.text().replace( /[^\w\s]/gi, '' )
135				.replace( /\s+/g, '-' )
136				.toLowerCase();
137
138			return name;
139		},
140
141		anchor: function( obj ) {
142			var self = this, name = self.name( obj ), anchor, text = self.opt.anchorText,
143				klass = self.opt.anchorClass, id;
144
145			if ( obj.attr( 'id' ) === undefined ) {
146				obj.attr( 'id', name );
147			}
148
149			id = obj.attr( 'id' );
150
151			anchor = $( '<a />' ).attr( 'href', '#' + id ).html( text ).addClass( klass );
152
153			if ( self.opt.position === 'append' ) {
154				obj.append( anchor );
155			} else {
156				obj.prepend( anchor );
157			}
158		},
159
160		back: function() {
161			var self = this, body = $( 'body, html' ), top = $( self.opt.top );
162
163			top.on( 'click', function( e ) {
164				e.preventDefault();
165
166				body.animate( {
167					'scrollTop': 0
168				}, self.opt.speed );
169			} );
170		},
171
172		top: function( that ) {
173			var self = this, top = self.opt.top, back;
174
175			if ( top !== false ) {
176				back = ( $( that ).scrollTop() > 200 ) ?
177				       $( top ).fadeIn() :
178				       $( top ).fadeOut();
179			}
180		},
181
182		spy: function() {
183			var self = this, previous, current, list, top, prev;
184
185			$( window ).scroll( function( e ) {
186				// show links back to top
187				self.top( this );
188				// get all the header on top of the viewport
189				current = self.headers.map( function( e ) {
190					if ( ( $( this ).offset().top - $( window ).scrollTop() ) < self.opt.spyOffset ) {
191						return this;
192					}
193				} );
194				// get only the latest header on the viewport
195				current = $( current ).eq( current.length - 1 );
196
197				if ( current && current.length ) {
198					// get all li tag that contains href of # ( all the parents )
199					list = $( 'li:has(a[href="#' + current.attr( 'id' ) + '"])' );
200
201					if ( prev !== undefined ) {
202						prev.removeClass( 'active' );
203					}
204
205					list.addClass( 'active' );
206					prev = list;
207				}
208			} );
209		}
210	};
211
212	$.fn.anchorific = function( options ) {
213		return this.each( function() {
214			if ( ! $.data( this, 'anchorific' ) ) {
215				var anchor = Object.create( Anchorific );
216
217				anchor.init( options, this );
218
219				$.data( this, 'anchorific', anchor );
220			}
221		} );
222	};
223
224})( jQuery, window, document );