| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow |
| 8 | */ |
| 9 | |
| 10 | /* globals Event$Init */ |
| 11 | |
| 12 | /** |
| 13 | * A bridge event class that extends the W3C Event interface and carries |
| 14 | * the native event payload. This is used as a compatibility layer during |
| 15 | * the migration from the legacy SyntheticEvent system to EventTarget-based |
| 16 | * dispatching. |
| 17 | */ |
| 18 | export default class LegacySyntheticEvent extends Event { |
| 19 | _nativeEvent: {[string]: mixed}; |
| 20 | _propagationStopped: boolean; |
| 21 | |
| 22 | constructor( |
| 23 | type: string, |
| 24 | options: Event$Init, |
| 25 | nativeEvent: {[string]: mixed}, |
| 26 | ) { |
| 27 | super(type, options); |
| 28 | this._nativeEvent = nativeEvent; |
| 29 | this._propagationStopped = false; |
| 30 | } |
| 31 | |
| 32 | get nativeEvent(): {[string]: mixed} { |
| 33 | return this._nativeEvent; |
| 34 | } |
| 35 | |
| 36 | stopPropagation(): void { |
| 37 | super.stopPropagation(); |
| 38 | this._propagationStopped = true; |
| 39 | } |
| 40 | |
| 41 | stopImmediatePropagation(): void { |
| 42 | super.stopImmediatePropagation(); |
| 43 | this._propagationStopped = true; |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * No-op for backward compatibility. The legacy SyntheticEvent system |
| 48 | * used pooling which required calling persist() to keep the event. |
| 49 | * With EventTarget-based dispatching, events are never pooled. |
| 50 | */ |
| 51 | persist(): void { |
| 52 | // No-op |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Backward-compatible wrapper for `defaultPrevented`. |
| 57 | */ |
| 58 | isDefaultPrevented(): boolean { |
| 59 | return this.defaultPrevented; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Backward-compatible wrapper. Returns true if stopPropagation() |
| 64 | * has been called. |
| 65 | */ |
| 66 | isPropagationStopped(): boolean { |
| 67 | return this._propagationStopped; |
| 68 | } |
| 69 | } |