react-dom-core/lib/SimpleEventPlugin.js

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 */

'use strict';

var _prodInvariant = require('./reactProdInvariant');

var EventListener = require('fbjs/lib/EventListener');
var EventPropagators = require('./EventPropagators');
var ReactDOMComponentTree = require('./ReactDOMComponentTree');
var SyntheticAnimationEvent = require('./SyntheticAnimationEvent');
var SyntheticClipboardEvent = require('./SyntheticClipboardEvent');
var SyntheticEvent = require('./SyntheticEvent');
var SyntheticFocusEvent = require('./SyntheticFocusEvent');
var SyntheticKeyboardEvent = require('./SyntheticKeyboardEvent');
var SyntheticMouseEvent = require('./SyntheticMouseEvent');
var SyntheticDragEvent = require('./SyntheticDragEvent');
var SyntheticTouchEvent = require('./SyntheticTouchEvent');
var SyntheticTransitionEvent = require('./SyntheticTransitionEvent');
var SyntheticUIEvent = require('./SyntheticUIEvent');
var SyntheticWheelEvent = require('./SyntheticWheelEvent');

var emptyFunction = require('fbjs/lib/emptyFunction');
var getEventCharCode = require('./getEventCharCode');
var invariant = require('fbjs/lib/invariant');

/**
 * Turns
 * ['abort', ...]
 * into
 * eventTypes = {
 *   'abort': {
 *     phasedRegistrationNames: {
 *       bubbled: 'onAbort',
 *       captured: 'onAbortCapture',
 *     },
 *     dependencies: ['topAbort'],
 *   },
 *   ...
 * };
 * topLevelEventsToDispatchConfig = {
 *   'topAbort': { sameConfig }
 * };
 */
var eventTypes = {};
var topLevelEventsToDispatchConfig = {};
['abort', 'animationEnd', 'animationIteration', 'animationStart', 'blur', 'canPlay', 'canPlayThrough', 'click', 'contextMenu', 'copy', 'cut', 'doubleClick', 'drag', 'dragEnd', 'dragEnter', 'dragExit', 'dragLeave', 'dragOver', 'dragStart', 'drop', 'durationChange', 'emptied', 'encrypted', 'ended', 'error', 'focus', 'input', 'invalid', 'keyDown', 'keyPress', 'keyUp', 'load', 'loadedData', 'loadedMetadata', 'loadStart', 'mouseDown', 'mouseMove', 'mouseOut', 'mouseOver', 'mouseUp', 'paste', 'pause', 'play', 'playing', 'progress', 'rateChange', 'reset', 'scroll', 'seeked', 'seeking', 'stalled', 'submit', 'suspend', 'timeUpdate', 'touchCancel', 'touchEnd', 'touchMove', 'touchStart', 'transitionEnd', 'volumeChange', 'waiting', 'wheel'].forEach(function (event) {
  var capitalizedEvent = event[0].toUpperCase() + event.slice(1);
  var onEvent = 'on' + capitalizedEvent;
  var topEvent = 'top' + capitalizedEvent;

  var type = {
    phasedRegistrationNames: {
      bubbled: onEvent,
      captured: onEvent + 'Capture'
    },
    dependencies: [topEvent]
  };
  eventTypes[event] = type;
  topLevelEventsToDispatchConfig[topEvent] = type;
});

var onClickListeners = {};

function getDictionaryKey(inst) {
  // Prevents V8 performance issue:
  // https://github.com/facebook/react/pull/7232
  return '.' + inst._rootNodeID;
}

function isInteractive(tag) {
  return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';
}

var SimpleEventPlugin = {
  eventTypes: eventTypes,

  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var dispatchConfig = topLevelEventsToDispatchConfig[topLevelType];
    if (!dispatchConfig) {
      return null;
    }
    var EventConstructor;
    switch (topLevelType) {
      case 'topAbort':
      case 'topCanPlay':
      case 'topCanPlayThrough':
      case 'topDurationChange':
      case 'topEmptied':
      case 'topEncrypted':
      case 'topEnded':
      case 'topError':
      case 'topInput':
      case 'topInvalid':
      case 'topLoad':
      case 'topLoadedData':
      case 'topLoadedMetadata':
      case 'topLoadStart':
      case 'topPause':
      case 'topPlay':
      case 'topPlaying':
      case 'topProgress':
      case 'topRateChange':
      case 'topReset':
      case 'topSeeked':
      case 'topSeeking':
      case 'topStalled':
      case 'topSubmit':
      case 'topSuspend':
      case 'topTimeUpdate':
      case 'topVolumeChange':
      case 'topWaiting':
        // HTML Events
        // @see http://www.w3.org/TR/html5/index.html#events-0
        EventConstructor = SyntheticEvent;
        break;
      case 'topKeyPress':
        // Firefox creates a keypress event for function keys too. This removes
        // the unwanted keypress events. Enter is however both printable and
        // non-printable. One would expect Tab to be as well (but it isn't).
        if (getEventCharCode(nativeEvent) === 0) {
          return null;
        }
      /* falls through */
      case 'topKeyDown':
      case 'topKeyUp':
        EventConstructor = SyntheticKeyboardEvent;
        break;
      case 'topBlur':
      case 'topFocus':
        EventConstructor = SyntheticFocusEvent;
        break;
      case 'topClick':
        // Firefox creates a click event on right mouse clicks. This removes the
        // unwanted click events.
        if (nativeEvent.button === 2) {
          return null;
        }
      /* falls through */
      case 'topDoubleClick':
      case 'topMouseDown':
      case 'topMouseMove':
      case 'topMouseUp':
      // TODO: Disabled elements should not respond to mouse events
      /* falls through */
      case 'topMouseOut':
      case 'topMouseOver':
      case 'topContextMenu':
        EventConstructor = SyntheticMouseEvent;
        break;
      case 'topDrag':
      case 'topDragEnd':
      case 'topDragEnter':
      case 'topDragExit':
      case 'topDragLeave':
      case 'topDragOver':
      case 'topDragStart':
      case 'topDrop':
        EventConstructor = SyntheticDragEvent;
        break;
      case 'topTouchCancel':
      case 'topTouchEnd':
      case 'topTouchMove':
      case 'topTouchStart':
        EventConstructor = SyntheticTouchEvent;
        break;
      case 'topAnimationEnd':
      case 'topAnimationIteration':
      case 'topAnimationStart':
        EventConstructor = SyntheticAnimationEvent;
        break;
      case 'topTransitionEnd':
        EventConstructor = SyntheticTransitionEvent;
        break;
      case 'topScroll':
        EventConstructor = SyntheticUIEvent;
        break;
      case 'topWheel':
        EventConstructor = SyntheticWheelEvent;
        break;
      case 'topCopy':
      case 'topCut':
      case 'topPaste':
        EventConstructor = SyntheticClipboardEvent;
        break;
    }
    !EventConstructor ? process.env.NODE_ENV !== 'production' ? invariant(false, 'SimpleEventPlugin: Unhandled event type, `%s`.', topLevelType) : _prodInvariant('86', topLevelType) : void 0;
    var event = EventConstructor.getPooled(dispatchConfig, targetInst, nativeEvent, nativeEventTarget);
    EventPropagators.accumulateTwoPhaseDispatches(event);
    return event;
  },

  didPutListener: function (inst, registrationName, listener) {
    // Mobile Safari does not fire properly bubble click events on
    // non-interactive elements, which means delegated click listeners do not
    // fire. The workaround for this bug involves attaching an empty click
    // listener on the target node.
    // http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
    if (registrationName === 'onClick' && !isInteractive(inst._tag)) {
      var key = getDictionaryKey(inst);
      var node = ReactDOMComponentTree.getNodeFromInstance(inst);
      if (!onClickListeners[key]) {
        onClickListeners[key] = EventListener.listen(node, 'click', emptyFunction);
      }
    }
  },

  willDeleteListener: function (inst, registrationName) {
    if (registrationName === 'onClick' && !isInteractive(inst._tag)) {
      var key = getDictionaryKey(inst);
      onClickListeners[key].remove();
      delete onClickListeners[key];
    }
  }
};

module.exports = SimpleEventPlugin;