https://elhierro.travel/modules/custom/hic_md_loader/js/jquery.visible.js?tm9kk1

1(function($) {
2
3	/**
4	 * Copyright 2012, Digital Fusion Licensed under the MIT license.
5	 * http://teamdf.com/jquery-plugins/license/
6	 * 
7	 * @author Sam Sehnert
8	 * @desc A small plugin that checks whether elements are within the user
9	 *       visible viewport of a web browser. can accounts for vertical
10	 *       position, horizontal, or both
11	 */
12	var $w = $(window);
13	$.fn.visible = function(partial, hidden, direction, container) {
14
15		if (this.length < 1)
16			return;
17
18		// Set direction default to 'both'.
19		direction = direction || 'both';
20
21		var $t = this.length > 1 ? this.eq(0) : this, isContained = typeof container !== 'undefined'
22				&& container !== null, $c = isContained ? $(container) : $w, wPosition = isContained ? $c
23				.position()
24				: 0, t = $t.get(0), vpWidth = $c.outerWidth(), vpHeight = $c
25				.outerHeight(), clientSize = hidden === true ? t.offsetWidth
26				* t.offsetHeight : true;
27
28		if (typeof t.getBoundingClientRect === 'function') {
29
30			// Use this native browser method, if available.
31			var rec = t.getBoundingClientRect(), tViz = isContained ? rec.top
32					- wPosition.top >= 0
33					&& rec.top < vpHeight + wPosition.top : rec.top >= 0
34					&& rec.top < vpHeight, bViz = isContained ? rec.bottom
35					- wPosition.top > 0
36					&& rec.bottom <= vpHeight + wPosition.top : rec.bottom > 0
37					&& rec.bottom <= vpHeight, lViz = isContained ? rec.left
38					- wPosition.left >= 0
39					&& rec.left < vpWidth + wPosition.left : rec.left >= 0
40					&& rec.left < vpWidth, rViz = isContained ? rec.right
41					- wPosition.left > 0
42					&& rec.right < vpWidth + wPosition.left : rec.right > 0
43					&& rec.right <= vpWidth, vVisible = partial ? tViz || bViz
44					: tViz && bViz, hVisible = partial ? lViz || rViz : lViz
45					&& rViz, vVisible = (rec.top < 0 && rec.bottom > vpHeight) ? true
46					: vVisible, hVisible = (rec.left < 0 && rec.right > vpWidth) ? true
47					: hVisible;
48
49			if (direction === 'both')
50				return clientSize && vVisible && hVisible;
51			else if (direction === 'vertical')
52				return clientSize && vVisible;
53			else if (direction === 'horizontal')
54				return clientSize && hVisible;
55		} else {
56
57			var viewTop = isContained ? 0 : wPosition, viewBottom = viewTop
58					+ vpHeight, viewLeft = $c.scrollLeft(), viewRight = viewLeft
59					+ vpWidth, position = $t.position(), _top = position.top, _bottom = _top
60					+ $t.height(), _left = position.left, _right = _left
61					+ $t.width(), compareTop = partial === true ? _bottom
62					: _top, compareBottom = partial === true ? _top : _bottom, compareLeft = partial === true ? _right
63					: _left, compareRight = partial === true ? _left : _right;
64
65			if (direction === 'both')
66				return !!clientSize
67						&& ((compareBottom <= viewBottom) && (compareTop >= viewTop))
68						&& ((compareRight <= viewRight) && (compareLeft >= viewLeft));
69			else if (direction === 'vertical')
70				return !!clientSize
71						&& ((compareBottom <= viewBottom) && (compareTop >= viewTop));
72			else if (direction === 'horizontal')
73				return !!clientSize
74						&& ((compareRight <= viewRight) && (compareLeft >= viewLeft));
75		}
76	};
77
78})(jQuery);