https://www.citeco.fr/themes/custom/cem/js/vendor/zoomer/jquery.mousewheel.js?tm91kp

1/*! Copyright (c) 2013 Brandon Aaron (http://brandon.aaron.sh)
2 * Licensed under the MIT License (LICENSE.txt).
3 *
4 * Version: 3.1.4
5 *
6 * Requires: 1.2.2+
7 */
8
9(function (factory) {
10    if ( typeof define === 'function' && define.amd ) {
11        // AMD. Register as an anonymous module.
12        define(['jquery'], factory);
13    } else if (typeof exports === 'object') {
14        // Node/CommonJS style for Browserify
15        module.exports = factory;
16    } else {
17        // Browser globals
18        factory(jQuery);
19    }
20}(function ($) {
21
22    var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'];
23    var toBind = 'onwheel' in document || document.documentMode >= 9 ? ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'];
24    var lowestDelta, lowestDeltaXY;
25
26    if ( $.event.fixHooks ) {
27        for ( var i = toFix.length; i; ) {
28            $.event.fixHooks[ toFix[--i] ] = $.event.mouseHooks;
29        }
30    }
31
32    $.event.special.mousewheel = {
33        setup: function() {
34            if ( this.addEventListener ) {
35                for ( var i = toBind.length; i; ) {
36                    this.addEventListener( toBind[--i], handler, false );
37                }
38            } else {
39                this.onmousewheel = handler;
40            }
41        },
42
43        teardown: function() {
44            if ( this.removeEventListener ) {
45                for ( var i = toBind.length; i; ) {
46                    this.removeEventListener( toBind[--i], handler, false );
47                }
48            } else {
49                this.onmousewheel = null;
50            }
51        }
52    };
53
54    $.fn.extend({
55        mousewheel: function(fn) {
56            return fn ? this.bind('mousewheel', fn) : this.trigger('mousewheel');
57        },
58
59        unmousewheel: function(fn) {
60            return this.unbind('mousewheel', fn);
61        }
62    });
63
64
65    function handler(event) {
66        var orgEvent   = event || window.event,
67            args       = [].slice.call(arguments, 1),
68            delta      = 0,
69            deltaX     = 0,
70            deltaY     = 0,
71            absDelta   = 0,
72            absDeltaXY = 0,
73            fn;
74        event = $.event.fix(orgEvent);
75        event.type = 'mousewheel';
76
77        // Old school scrollwheel delta
78        if ( orgEvent.wheelDelta ) { delta = orgEvent.wheelDelta; }
79        if ( orgEvent.detail )     { delta = orgEvent.detail * -1; }
80
81        // At a minimum, setup the deltaY to be delta
82        deltaY = delta;
83
84        // Firefox < 17 related to DOMMouseScroll event
85        if ( orgEvent.axis !== undefined && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) {
86            deltaY = 0;
87            deltaX = delta * -1;
88        }
89
90        // New school wheel delta (wheel event)
91        if ( orgEvent.deltaY ) {
92            deltaY = orgEvent.deltaY * -1;
93            delta  = deltaY;
94        }
95        if ( orgEvent.deltaX ) {
96            deltaX = orgEvent.deltaX;
97            delta  = deltaX * -1;
98        }
99
100        // Webkit
101        if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; }
102        if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; }
103
104        // Look for lowest delta to normalize the delta values
105        absDelta = Math.abs(delta);
106        if ( !lowestDelta || absDelta < lowestDelta ) { lowestDelta = absDelta; }
107        absDeltaXY = Math.max(Math.abs(deltaY), Math.abs(deltaX));
108        if ( !lowestDeltaXY || absDeltaXY < lowestDeltaXY ) { lowestDeltaXY = absDeltaXY; }
109
110        // Get a whole value for the deltas
111        fn     = delta > 0 ? 'floor' : 'ceil';
112        delta  = Math[fn](delta  / lowestDelta);
113        deltaX = Math[fn](deltaX / lowestDeltaXY);
114        deltaY = Math[fn](deltaY / lowestDeltaXY);
115
116        // Add event and delta to the front of the arguments
117        args.unshift(event, delta, deltaX, deltaY);
118
119        return ($.event.dispatch || $.event.handle).apply(this, args);
120    }
121
122}));