https://e-ukmppd.com/wp-content/themes/decades/js/jquery.singlePageNav.js?ver=6.6.9

1/**
2 * Single Page Nav Plugin
3 * Copyright (c) 2014 Chris Wojcik <[email protected]>
4 * Dual licensed under MIT and GPL.
5 * @author Chris Wojcik
6 * @version 1.2.0
7 */
8
9// Utility
10if (typeof Object.create !== "function") {
11  Object.create = function (obj) {
12    function F() {}
13    F.prototype = obj;
14    return new F();
15  };
16}
17
18(function ($, window, document, undefined) {
19  "use strict";
20
21  var SinglePageNav = {
22    init: function (options, container) {
23      this.options = $.extend({}, $.fn.singlePageNav.defaults, options);
24
25      this.container = container;
26      this.$container = $(container);
27      this.$links = this.$container.find("a");
28
29      if (this.options.filter !== "") {
30        this.$links = this.$links.filter(this.options.filter);
31      }
32
33      this.$window = $(window);
34      this.$htmlbody = $("html, body");
35
36      this.$links.on("click.singlePageNav", $.proxy(this.handleClick, this));
37
38      this.didScroll = false;
39      this.checkPosition();
40      this.setTimer();
41    },
42
43    handleClick: function (e) {
44      var self = this,
45        link = e.currentTarget,
46        $elem = $(link.hash);
47
48      e.preventDefault();
49
50      if ($elem.length) {
51        // Make sure the target elem exists
52
53        // Prevent active link from cycling during the scroll
54        self.clearTimer();
55
56        // Before scrolling starts
57        if (typeof self.options.beforeStart === "function") {
58          self.options.beforeStart();
59        }
60
61        self.setActiveLink(link.hash);
62
63        self.scrollTo($elem, function () {
64          if (self.options.updateHash && history.pushState) {
65            history.pushState(null, null, link.hash);
66          }
67
68          self.setTimer();
69
70          // After scrolling ends
71          if (typeof self.options.onComplete === "function") {
72            self.options.onComplete();
73          }
74        });
75      }
76    },
77
78    scrollTo: function ($elem, callback) {
79      var self = this;
80      var target = self.getCoords($elem).top;
81      var called = false;
82
83      self.$htmlbody.stop().animate(
84        { scrollTop: target },
85        {
86          duration: self.options.speed,
87          easing: self.options.easing,
88          complete: function () {
89            if (typeof callback === "function" && !called) {
90              callback();
91            }
92            called = true;
93          },
94        }
95      );
96    },
97
98    setTimer: function () {
99      var self = this;
100
101      self.$window.on("scroll.singlePageNav", function () {
102        self.didScroll = true;
103      });
104
105      self.timer = setInterval(function () {
106        if (self.didScroll) {
107          self.didScroll = false;
108          self.checkPosition();
109        }
110      }, 250);
111    },
112
113    clearTimer: function () {
114      clearInterval(this.timer);
115      this.$window.off("scroll.singlePageNav");
116      this.didScroll = false;
117    },
118
119    // Check the scroll position and set the active section
120    checkPosition: function () {
121      var scrollPos = this.$window.scrollTop();
122      var currentSection = this.getCurrentSection(scrollPos);
123      if (currentSection !== null) {
124        this.setActiveLink(currentSection);
125      }
126    },
127
128    getCoords: function ($elem) {
129      return {
130        top: Math.round($elem.offset().top) - this.options.offset,
131      };
132    },
133
134    setActiveLink: function (href) {
135      var $activeLink = this.$container.find("a[href$='" + href + "']");
136
137      if (!$activeLink.hasClass(this.options.currentClass)) {
138        this.$links.removeClass(this.options.currentClass);
139        $activeLink.addClass(this.options.currentClass);
140      }
141    },
142
143    getCurrentSection: function (scrollPos) {
144      var i, hash, coords, section;
145
146      for (i = 0; i < this.$links.length; i++) {
147        hash = this.$links[i].hash;
148
149        if ($(hash).length) {
150          coords = this.getCoords($(hash));
151
152          if (scrollPos >= coords.top - this.options.threshold) {
153            section = hash;
154          }
155        }
156      }
157
158      // The current section or the first link if it is found
159      return section || (this.$links.length === 0 ? null : this.$links[0].hash);
160    },
161  };
162
163  $.fn.singlePageNav = function (options) {
164    return this.each(function () {
165      var singlePageNav = Object.create(SinglePageNav);
166      singlePageNav.init(options, this);
167    });

168  };
169
170  $.fn.singlePageNav.defaults = {
171    offset: 0,
172    threshold: 120,
173    speed: 400,
174    currentClass: "current",
175    easing: "swing",
176    updateHash: false,
177    filter: "",
178    onComplete: false,
179    beforeStart: false,
180  };
181})(jQuery, window, document);