third_party/WebKit/Source/core/events/EventDispatchResult.h

// 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