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/**
* 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 SyntheticUIEvent = require('./SyntheticUIEvent');
var ViewportMetrics = require('./ViewportMetrics');
var getEventModifierState = require('./getEventModifierState');
/**
* @interface MouseEvent
* @see http://www.w3.org/TR/DOM-Level-3-Events/
*/
var MouseEventInterface = {
screenX: null,
screenY: null,
clientX: null,
clientY: null,
ctrlKey: null,
shiftKey: null,
altKey: null,
metaKey: null,
getModifierState: getEventModifierState,
button: function (event) {
// Webkit, Firefox, IE9+
// which: 1 2 3
// button: 0 1 2 (standard)
var button = event.button;
if ('which' in event) {
return button;
}
// IE<9
// which: undefined
// button: 0 0 0
// button: 1 4 2 (onmouseup)
return button === 2 ? 2 : button === 4 ? 1 : 0;
},
buttons: null,
relatedTarget: function (event) {
return event.relatedTarget || (event.fromElement === event.srcElement ? event.toElement : event.fromElement);
},
// "Proprietary" Interface.
pageX: function (event) {
return 'pageX' in event ? event.pageX : event.clientX + ViewportMetrics.currentScrollLeft;
},
pageY: function (event) {
return 'pageY' in event ? event.pageY : event.clientY + ViewportMetrics.currentScrollTop;
}
};
/**
* @param {object} dispatchConfig Configuration used to dispatch this event.
* @param {string} dispatchMarker Marker identifying the event target.
* @param {object} nativeEvent Native browser event.
* @extends {SyntheticUIEvent}
*/
function SyntheticMouseEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
return SyntheticUIEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
}
SyntheticUIEvent.augmentClass(SyntheticMouseEvent, MouseEventInterface);
module.exports = SyntheticMouseEvent;
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