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Diffstat (limited to 'node_modules/react-dom/lib/SyntheticWheelEvent.js')
-rw-r--r-- | node_modules/react-dom/lib/SyntheticWheelEvent.js | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/SyntheticWheelEvent.js b/node_modules/react-dom/lib/SyntheticWheelEvent.js new file mode 100644 index 000000000..e3ac8f9fa --- /dev/null +++ b/node_modules/react-dom/lib/SyntheticWheelEvent.js @@ -0,0 +1,53 @@ +/** + * Copyright 2013-present, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under the BSD-style license found in the + * LICENSE file in the root directory of this source tree. An additional grant + * of patent rights can be found in the PATENTS file in the same directory. + * + */ + +'use strict'; + +var SyntheticMouseEvent = require('./SyntheticMouseEvent'); + +/** + * @interface WheelEvent + * @see http://www.w3.org/TR/DOM-Level-3-Events/ + */ +var WheelEventInterface = { + deltaX: function (event) { + return 'deltaX' in event ? event.deltaX : + // Fallback to `wheelDeltaX` for Webkit and normalize (right is positive). + 'wheelDeltaX' in event ? -event.wheelDeltaX : 0; + }, + deltaY: function (event) { + return 'deltaY' in event ? event.deltaY : + // Fallback to `wheelDeltaY` for Webkit and normalize (down is positive). + 'wheelDeltaY' in event ? -event.wheelDeltaY : + // Fallback to `wheelDelta` for IE<9 and normalize (down is positive). + 'wheelDelta' in event ? -event.wheelDelta : 0; + }, + deltaZ: null, + + // Browsers without "deltaMode" is reporting in raw wheel delta where one + // notch on the scroll is always +/- 120, roughly equivalent to pixels. + // A good approximation of DOM_DELTA_LINE (1) is 5% of viewport size or + // ~40 pixels, for DOM_DELTA_SCREEN (2) it is 87.5% of viewport size. + deltaMode: null +}; + +/** + * @param {object} dispatchConfig Configuration used to dispatch this event. + * @param {string} dispatchMarker Marker identifying the event target. + * @param {object} nativeEvent Native browser event. + * @extends {SyntheticMouseEvent} + */ +function SyntheticWheelEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) { + return SyntheticMouseEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget); +} + +SyntheticMouseEvent.augmentClass(SyntheticWheelEvent, WheelEventInterface); + +module.exports = SyntheticWheelEvent;
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