/**

* @license

* Copyright Google Inc. All Rights Reserved.

*

* Use of this source code is governed by an MIT-style license that can be

* found in the LICENSE file at https://angular.io/license

*/

export function eventTargetPatch(_global: any, api: _ZonePrivate) {

if ((Zone as any)[api.symbol('patchEventTarget')]) {

// EventTarget is already patched.

return;

}

const {eventNames, zoneSymbolEventNames, TRUE_STR, FALSE_STR, ZONE_SYMBOL_PREFIX} =

api.getGlobalObjects()!;

// predefine all __zone_symbol__ + eventName + true/false string

for (let i = 0; i < eventNames.length; i++) {

const eventName = eventNames[i];

const falseEventName = eventName + FALSE_STR;

const trueEventName = eventName + TRUE_STR;

const symbol = ZONE_SYMBOL_PREFIX + falseEventName;

const symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;

zoneSymbolEventNames[eventName] = {};

zoneSymbolEventNames[eventName][FALSE_STR] = symbol;

zoneSymbolEventNames[eventName][TRUE_STR] = symbolCapture;

}

const EVENT_TARGET = _global['EventTarget'];

if (!EVENT_TARGET || !EVENT_TARGET.prototype) {

return;

}

api.patchEventTarget(_global, [EVENT_TARGET && EVENT_TARGET.prototype]);

return true;

}

export function patchEvent(global: any, api: _ZonePrivate) {

api.patchEventPrototype(global, api);

}