https://polarisweb.arlingtonlibrary.org/polaris/scripts/jquery.fastClick.js

1/**
2 * jQuery.fastClick.js
3 *
4 * Work around the 300ms delay for the click event in some mobile browsers.
5 *
6 * Code based on <http://code.google.com/mobile/articles/fast_buttons.html>
7 *
8 * @usage
9 * $('button').fastClick(function() {alert('clicked!');});
10 *
11 * @license MIT
12 * @author Dave Hulbert (dave1010)
13 * @version 1.0.0 2013-01-17
14 */
15
16/*global document, window, jQuery, Math */
17
18(function($) {
19
20$.fn.fastClick = function(handler) {
21	return $(this).each(function(){
22		$.FastButton($(this)[0], handler);
23	});
24};
25
26$.FastButton = function(element, handler) {
27	var startX, startY;
28
29	var reset = function() {
30		$(element).unbind('touchend');
31		$("body").unbind('touchmove.fastClick');
32	};
33
34	var onClick = function(event) {
35		event.stopPropagation();
36		reset();
37		handler.call(this, event);
38
39		if (event.type === 'touchend') {
40			$.clickbuster.preventGhostClick(startX, startY);
41		}
42	};
43
44	var onTouchMove = function(event) {
45		if (Math.abs(event.originalEvent.touches[0].clientX - startX) > 10 ||
46			Math.abs(event.originalEvent.touches[0].clientY - startY) > 10) {
47			reset();
48		}
49	};
50
51	var onTouchStart = function(event) {
52		event.stopPropagation();
53
54		$(element).bind('touchend', onClick);
55		$("body").bind('touchmove.fastClick', onTouchMove);
56
57		startX = event.originalEvent.touches[0].clientX;
58		startY = event.originalEvent.touches[0].clientY;
59	};
60
61	$(element).bind({
62		touchstart: onTouchStart,
63		click: onClick
64	});
65};
66
67$.clickbuster = {
68	coordinates: [],
69
70	preventGhostClick: function(x, y) {
71		$.clickbuster.coordinates.push(x, y);
72		window.setTimeout($.clickbuster.pop, 2500);
73	},
74
75	pop: function() {
76		$.clickbuster.coordinates.splice(0, 2);
77	},
78
79	onClick: function(event) {
80		var x, y, i;
81		for (i = 0; i < $.clickbuster.coordinates.length; i += 2) {
82			x = $.clickbuster.coordinates[i];
83			y = $.clickbuster.coordinates[i + 1];
84			if (Math.abs(event.clientX - x) < 25 && Math.abs(event.clientY - y) < 25) {
85				event.stopPropagation();
86				event.preventDefault();
87			}
88		}
89	}
90};
91
92$(function(){
93	if (document.addEventListener){
94		document.addEventListener('click', $.clickbuster.onClick, true);
95	} else if (document.attachEvent){
96		// for IE 7/8
97		document.attachEvent('onclick', $.clickbuster.onClick);
98	}
99});
100
101}(jQuery));