https://www.porbatata.pt/wp-content/themes/imix/js/thegem-sticky.js?ver=6.7.1

1(function ($) {
2
3    function getScrollY(elem){
4        return window.pageYOffset || document.documentElement.scrollTop;
5    }
6
7    function Sticky(el, options) {
8        var self = this;
9        this.el = el;
10        this.$el = $(el);
11
12        this.options = {
13        };
14        $.extend(this.options, options);
15
16        self.init();
17    }
18
19    $.fn.scSticky = function(options) {
20        $(this).each(function() {
21            return new Sticky(this, options);
22        });
23    }
24
25    Sticky.prototype = {
26        init: function() {
27            var self = this;
28
29            this.$wrapper = false;
30
31            this.$parent = this.getParent();
32
33            $(window).scroll(function() {
34                if (self.useSticky()) {
35                    self.wrap();
36                    self.scroll();
37                } else {
38                    self.unwrap();
39                }
40            });
41
42            $(window).resize(function() {
43                if (self.useSticky()) {
44                    self.wrap();
45                    self.scroll();
46                } else {
47                    self.unwrap();
48                }
49            });
50        },
51
52        wrap: function() {
53            if (!this.$wrapper)
54                this.$wrapper = this.$el.wrap('<div />').parent();
55
56            this.$wrapper.attr('class', this.$el.attr('class')).addClass('gem-sticky-block').css({
57                padding: 0,
58                height: this.$el.outerHeight()
59            });
60
61            this.$el.css({
62                width: this.$wrapper.outerWidth(),
63                margin: 0
64            });
65        },
66
67        getParent: function() {
68            return this.$el.parent();
69        },
70
71        useSticky: function() {
72            var is_sidebar = true;
73            if (this.$el.hasClass('sidebar')) {
74                if (this.$wrapper) {
75                    if (this.$wrapper.outerHeight() > this.$wrapper.siblings('.panel-center:first').outerHeight())
76                        is_sidebar = false;
77                } else {
78                    if (this.$el.outerHeight() > this.$el.siblings('.panel-center:first').outerHeight())
79                        is_sidebar = false;
80                }
81            }
82
83            return $(window).width() > 1000 && is_sidebar;
84        },
85
86        unwrap: function() {
87            if (this.$el.parent().is('.gem-sticky-block')) {
88                this.$el.unwrap();
89                this.$wrapper = false;
90            }
91            this.$el.css({
92                width: "",
93                top: "",
94                bottom: "",
95                margin: ""
96            });
97        },
98
99        scroll: function() {
100            var top_offset = parseInt($('html').css('margin-top'));
101
102            var $header = $('#site-header');
103            if ($header.hasClass('fixed')) {
104                top_offset += $header.outerHeight();
105            }
106
107            var scroll = getScrollY();
108            var offset = this.$wrapper.offset();
109            var parent_offset = this.$parent.offset();
110            var parent_bottom = parent_offset.top + this.$parent.outerHeight() - scroll;
111            var bottom = $(window).height() - parent_bottom;
112
113            if ( (top_offset + this.$el.outerHeight() ) >= parent_bottom ) {
114                this.$el.addClass('sticky-fixed').css({
115                    top: "",
116                    bottom: bottom,
117                    left: offset.left
118                });
119                return;
120            }
121
122            if ( (scroll + top_offset) > offset.top ) {
123                this.$el.addClass('sticky-fixed').css({
124                    top: top_offset,
125                    bottom: "",
126                    left: offset.left
127                });
128            } else {
129                this.$el.removeClass('sticky-fixed').css({
130                    top: "",
131                    bottom: "",
132                    left: ""
133                });
134            }
135        }
136    };
137
138}(jQuery));