https://onerpm.com/wp-content/themes/onerpm-v2/assets/js/jquery.nav.js?ver=2.0

1/*
2 * jQuery One Page Nav Plugin
3 * http://github.com/davist11/jQuery-One-Page-Nav
4 *
5 * Copyright (c) 2010 Trevor Davis (http://trevordavis.net)
6 * Dual licensed under the MIT and GPL licenses.
7 * Uses the same license as jQuery, see:
8 * http://jquery.org/license
9 *
10 * @version 3.0.0
11 *
12 * Example usage:
13 * $('#nav').onePageNav({
14 *   currentClass: 'current',
15 *   changeHash: false,
16 *   scrollSpeed: 750
17 * });
18 */
19
20;(function($, window, document, undefined){
21
22	// our plugin constructor
23	var OnePageNav = function(elem, options){
24		this.elem = elem;
25		this.$elem = $(elem);
26		this.options = options;
27		this.metadata = this.$elem.data('plugin-options');
28		this.$win = $(window);
29		this.sections = {};
30		this.didScroll = false;
31		this.$doc = $(document);
32		this.docHeight = this.$doc.height();
33	};
34
35	// the plugin prototype
36	OnePageNav.prototype = {
37		defaults: {
38			navItems: 'a',
39			currentClass: 'current',
40			changeHash: false,
41			easing: 'swing',
42			filter: '',
43			scrollSpeed: 750,
44			scrollThreshold: 0.5,
45			begin: false,
46			end: false,
47			scrollChange: false
48		},
49
50		init: function() {
51			// Introduce defaults that can be extended either
52			// globally or using an object literal.
53			this.config = $.extend({}, this.defaults, this.options, this.metadata);
54
55			this.$nav = this.$elem.find(this.config.navItems);
56
57			//Filter any links out of the nav
58			if(this.config.filter !== '') {
59				this.$nav = this.$nav.filter(this.config.filter);
60			}
61
62			//Handle clicks on the nav
63			this.$nav.on('click.onePageNav', $.proxy(this.handleClick, this));
64
65			//Get the section positions
66			this.getPositions();
67
68			//Handle scroll changes
69			this.bindInterval();
70
71			//Update the positions on resize too
72			this.$win.on('resize.onePageNav', $.proxy(this.getPositions, this));
73
74			return this;
75		},
76
77		adjustNav: function(self, $parent) {
78			self.$elem.find('.' + self.config.currentClass).removeClass(self.config.currentClass);
79			$parent.addClass(self.config.currentClass);
80		},
81
82		bindInterval: function() {
83			var self = this;
84			var docHeight;
85
86			self.$win.on('scroll.onePageNav', function() {
87				self.didScroll = true;
88			});
89
90			self.t = setInterval(function() {
91				docHeight = self.$doc.height();
92
93				//If it was scrolled
94				if(self.didScroll) {
95					self.didScroll = false;
96					self.scrollChange();
97				}
98
99				//If the document height changes
100				if(docHeight !== self.docHeight) {
101					self.docHeight = docHeight;
102					self.getPositions();
103				}
104			}, 250);
105		},
106
107		getHash: function($link) {
108			return $link.attr('href').split('#')[1];
109		},
110
111		getPositions: function() {
112			var self = this;
113			var linkHref;
114			var topPos;
115			var $target;
116
117			self.$nav.each(function() {
118				linkHref = self.getHash($(this));
119				$target = $('#' + linkHref);
120
121				if($target.length) {
122					topPos = $target.offset().top;
123					self.sections[linkHref] = Math.round(topPos);
124				}
125			});
126		},
127
128		getSection: function(windowPos) {
129			var returnValue = null;
130			var windowHeight = Math.round(this.$win.height() * this.config.scrollThreshold);
131
132			for(var section in this.sections) {
133				if((this.sections[section] - windowHeight) < windowPos) {
134					returnValue = section;
135				}
136			}
137
138			return returnValue;
139		},
140
141		handleClick: function(e) {
142			var self = this;
143			var $link = $(e.currentTarget);
144			var $parent = $link.parent();
145			var newLoc = '#' + self.getHash($link);
146
147			if(!$parent.hasClass(self.config.currentClass)) {
148				//Start callback
149				if(self.config.begin) {
150					self.config.begin();
151				}
152
153				//Change the highlighted nav item
154				self.adjustNav(self, $parent);
155
156				//Removing the auto-adjust on scroll
157				self.unbindInterval();
158
159				//Scroll to the correct position
160				self.scrollTo(newLoc, function() {
161					//Do we need to change the hash?
162					if(self.config.changeHash) {
163						window.location.hash = newLoc;
164					}
165
166					//Add the auto-adjust on scroll back in
167					self.bindInterval();
168
169					//End callback
170					if(self.config.end) {
171						self.config.end();
172					}
173				});
174			}
175
176			e.preventDefault();
177		},
178
179		scrollChange: function() {
180			var windowTop = this.$win.scrollTop();

181			var position = this.getSection(windowTop);
182			var $parent;
183
184			//If the position is set
185			if(position !== null) {
186				$parent = this.$elem.find('a[href$="#' + position + '"]').parent();
187
188				//If it's not already the current section
189				if(!$parent.hasClass(this.config.currentClass)) {
190					//Change the highlighted nav item
191					this.adjustNav(this, $parent);
192
193					//If there is a scrollChange callback
194					if(this.config.scrollChange) {
195						this.config.scrollChange($parent);
196					}
197				}
198			}
199		},
200
201		scrollTo: function(target, callback) {
202			var offset = $(target).offset().top;
203
204			$('html, body').animate({
205				scrollTop: offset
206			}, this.config.scrollSpeed, this.config.easing, callback);
207		},
208
209		unbindInterval: function() {
210			clearInterval(this.t);
211			this.$win.unbind('scroll.onePageNav');
212		}
213	};
214
215	OnePageNav.defaults = OnePageNav.prototype.defaults;
216
217	$.fn.onePageNav = function(options) {
218		return this.each(function() {
219			new OnePageNav(this, options).init();
220		});
221	};
222
223})( jQuery, window , document );