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components/com_tabulizer/assets/js/jquery.mousewheel.js

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+/*! Copyright (c) 2013 Brandon Aaron (http://brandon.aaron.sh)
+ * Licensed under the MIT License (LICENSE.txt).
+ *
+ * Version: 3.1.6
+ *
+ * Requires: jtQuery 1.2.2+
+ */
+
+(function (factory) {
+    if ( typeof define === 'function' && define.amd ) {
+        // AMD. Register as an anonymous module.
+        define(['jquery'], factory);
+    } else if (typeof exports === 'object') {
+        // Node/CommonJS style for Browserify
+        module.exports = factory;
+    } else {
+        // Browser globals
+        factory(jtQuery);
+    }
+}(function ($) {
+
+    var toFix  = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'],
+        toBind = ( 'onwheel' in document || document.documentMode >= 9 ) ?
+                    ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'],
+        slice  = Array.prototype.slice,
+        nullLowestDeltaTimeout, lowestDelta;
+
+    if ( $.event.fixHooks ) {
+        for ( var i = toFix.length; i; ) {
+            $.event.fixHooks[ toFix[--i] ] = $.event.mouseHooks;
+        }
+    }
+
+    $.event.special.mousewheel = {
+        version: '3.1.6',
+
+        setup: function() {
+            if ( this.addEventListener ) {
+                for ( var i = toBind.length; i; ) {
+                    this.addEventListener( toBind[--i], handler, false );
+                }
+            } else {
+                this.onmousewheel = handler;
+            }
+        },
+
+        teardown: function() {
+            if ( this.removeEventListener ) {
+                for ( var i = toBind.length; i; ) {
+                    this.removeEventListener( toBind[--i], handler, false );
+                }
+            } else {
+                this.onmousewheel = null;
+            }
+        }
+    };
+
+    $.fn.extend({
+        mousewheel: function(fn) {
+            return fn ? this.bind('mousewheel', fn) : this.trigger('mousewheel');
+        },
+
+        unmousewheel: function(fn) {
+            return this.unbind('mousewheel', fn);
+        }
+    });
+
+
+    function handler(event) {
+        var orgEvent   = event || window.event,
+            args       = slice.call(arguments, 1),
+            delta      = 0,
+            deltaX     = 0,
+            deltaY     = 0,
+            absDelta   = 0;
+        event = $.event.fix(orgEvent);
+        event.type = 'mousewheel';
+
+        // Old school scrollwheel delta
+        if ( 'detail'      in orgEvent ) { deltaY = orgEvent.detail * -1;      }
+        if ( 'wheelDelta'  in orgEvent ) { deltaY = orgEvent.wheelDelta;       }
+        if ( 'wheelDeltaY' in orgEvent ) { deltaY = orgEvent.wheelDeltaY;      }
+        if ( 'wheelDeltaX' in orgEvent ) { deltaX = orgEvent.wheelDeltaX * -1; }
+
+        // Firefox < 17 horizontal scrolling related to DOMMouseScroll event
+        if ( 'axis' in orgEvent && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) {
+            deltaX = deltaY * -1;
+            deltaY = 0;
+        }
+
+        // Set delta to be deltaY or deltaX if deltaY is 0 for backwards compatabilitiy
+        delta = deltaY === 0 ? deltaX : deltaY;
+
+        // New school wheel delta (wheel event)
+        if ( 'deltaY' in orgEvent ) {
+          deltaY = orgEvent.deltaY * -1;
+          delta  = deltaY;
+        }
+        if ( 'deltaX' in orgEvent ) {
+          deltaX = orgEvent.deltaX;
+          if ( deltaY === 0 ) { delta  = deltaX * -1; }
+        }
+
+        // No change actually happened, no reason to go any further
+        if ( deltaY === 0 && deltaX === 0 ) { return; }
+
+        // Store lowest absolute delta to normalize the delta values
+        absDelta = Math.max( Math.abs(deltaY), Math.abs(deltaX) );
+        if ( !lowestDelta || absDelta < lowestDelta ) {
+          lowestDelta = absDelta;
+        }
+
+        // Get a whole, normalized value for the deltas
+        delta  = Math[ delta  >= 1 ? 'floor' : 'ceil' ](delta  / lowestDelta);
+        deltaX = Math[ deltaX >= 1 ? 'floor' : 'ceil' ](deltaX / lowestDelta);
+        deltaY = Math[ deltaY >= 1 ? 'floor' : 'ceil' ](deltaY / lowestDelta);
+
+        // Add information to the event object
+        event.deltaX = deltaX;
+        event.deltaY = deltaY;
+        event.deltaFactor = lowestDelta;
+
+        // Add event and delta to the front of the arguments
+        args.unshift(event, delta, deltaX, deltaY);
+
+        // Clearout lowestDelta after sometime to better
+        // handle multiple device types that give different
+        // a different lowestDelta
+        // Ex: trackpad = 3 and mouse wheel = 120
+        if (nullLowestDeltaTimeout) { clearTimeout(nullLowestDeltaTimeout); }
+        nullLowestDeltaTimeout = setTimeout(nullLowestDelta, 200);
+
+        return ($.event.dispatch || $.event.handle).apply(this, args);
+    }
+
+    function nullLowestDelta() {
+      lowestDelta = null;
+    }
+
+}));