| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef EventDispatchResult_h |
| #define EventDispatchResult_h |
| |
| namespace blink { |
| |
| enum class DispatchEventResult { |
| // Event was not canceled by event handler or default event handler. |
| NotCanceled, |
| // Event was canceled by event handler; i.e. a script handler calling |
| // preventDefault. |
| CanceledByEventHandler, |
| // Event was canceled by the default event handler; i.e. executing the default |
| // action. This result should be used sparingly as it deviates from the DOM |
| // Event Dispatch model. Default event handlers really shouldn't be invoked |
| // inside of dispatch. |
| CanceledByDefaultEventHandler, |
| // Event was canceled but suppressed before dispatched to event handler. This |
| // result should be used sparingly; and its usage likely indicates there is |
| // potential for a bug. Trusted events may return this code; but untrusted |
| // events likely should always execute the event handler the developer intends |
| // to execute. |
| CanceledBeforeDispatch, |
| }; |
| |
| } // namespace blink |
| |
| #endif // EventDispatchResult_h |