/**
 * 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.
 *
 * @providesModule SyntheticMouseEvent
 */

'use strict';

var SyntheticUIEvent = require('SyntheticUIEvent');

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,
  pageX: null,
  pageY: 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);
  },
};

/**
 * @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;

/**
 * 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.
 *
 * @providesModule SyntheticMouseEvent
 */

'use strict';

var SyntheticUIEvent = require('SyntheticUIEvent');

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,
  pageX: null,
  pageY: null,
  ctrlKey: null,
  shiftKey: null,
  altKey: null,
  metaKey: null,
  getModifierState: getEventModifierState,
  button: null,
  buttons: null,
  relatedTarget: function(event) {
    return event.relatedTarget ||
      (event.fromElement === event.srcElement
        ? event.toElement
        : event.fromElement);
  },
};

/**
 * @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;

Remove MouseEvent.button polyfill (#9334)