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Clean up the various delta conditionals a bit

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This commit is contained in:
Brandon Aaron
2013-11-13 10:51:32 -05:00
parent ced8a7b3b8
commit b1a07617f2
1 changed files with 21 additions and 22 deletions
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jquery.mousewheel.js
+21 -22
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@@ -3,7 +3,7 @@
*
* Version: 3.1.5-pre
*
* Requires: 1.2.2+
* Requires: jQuery 1.2.2+
*/
(function (factory) {
@@ -19,8 +19,9 @@
}
}(function ($) {
var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'];
var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'];
var toBind = 'onwheel' in document || document.documentMode >= 9 ? ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'];
var slice = Array.prototype.slice;
var lowestDelta, lowestDeltaXY;
if ( $.event.fixHooks ) {
@@ -64,7 +65,7 @@
function handler(event) {
var orgEvent = event || window.event,
args = [].slice.call(arguments, 1),
args = slice.call(arguments, 1),
delta = 0,
deltaX = 0,
deltaY = 0,
@@ -75,31 +76,29 @@
event.type = 'mousewheel';
// Old school scrollwheel delta
if ( orgEvent.wheelDelta ) { delta = orgEvent.wheelDelta; }
if ( orgEvent.detail ) { delta = orgEvent.detail * -1; }
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; }
// At a minimum, setup the deltaY to be delta
deltaY = delta;
// Firefox < 17 related to DOMMouseScroll event
if ( orgEvent.axis !== undefined && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) {
// Firefox < 17 horizontal scrolling related to DOMMouseScroll event
if ( 'axis' in orgEvent && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) {
deltaY = 0;
deltaX = delta * -1;
}
// New school wheel delta (wheel event)
if ( orgEvent.deltaY ) {
deltaY = orgEvent.deltaY * -1;
delta = deltaY;
}
if ( orgEvent.deltaX ) {
deltaX = orgEvent.deltaX;
delta = deltaX * -1;
}
// Set delta to be deltaY or deltaX if deltaY is 0 for backwards compatabilitiy
delta = deltaY === 0 ? deltaX : deltaY;
// Webkit
if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; }
if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; }
// New school wheel delta (wheel event)
if ( 'deltaY' in orgEvent ) {
deltaY = orgEvent.deltaY * -1;
delta = deltaY;
}
if ( 'deltaX' in orgEvent ) {
deltaX = orgEvent.deltaX;
delta = detlaX * -1;
}
// Look for lowest delta to normalize the delta values
absDelta = Math.abs(delta);