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// Copyright 2018 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_WEB_ON_ERROR_EVENT_LISTENER_H_
#define COBALT_WEB_ON_ERROR_EVENT_LISTENER_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/optional.h"
#include "cobalt/script/union_type.h"
#include "cobalt/script/wrappable.h"
#include "cobalt/web/event.h"
#include "cobalt/web/event_listener.h"
namespace cobalt {
namespace web {
// This interface exists to support the special case OnErrorEventHandler:
// https://html.spec.whatwg.org/#onerroreventhandler
class OnErrorEventListener {
public:
using EventOrMessage = script::UnionType2<scoped_refptr<Event>, std::string>;
// The public interface simply accepts the error event, which will be
// translated to the more complicated IDL handleEvent interface which is
// marked protected. During that translation, the event parameters may
// be unpacked if the |unpack_error_events| flag is true.
base::Optional<bool> HandleEvent(
const scoped_refptr<script::Wrappable>& callback_this,
const scoped_refptr<Event>& event, bool* had_exception,
bool unpack_error_events) const;
protected:
virtual base::Optional<bool> HandleEvent(
const scoped_refptr<script::Wrappable>& callback_this,
const EventOrMessage& message, const std::string& filename, uint32 lineno,
uint32 colno, const script::ValueHandleHolder* error,
bool* had_exception) const = 0;
};
} // namespace web
} // namespace cobalt
#endif // COBALT_WEB_ON_ERROR_EVENT_LISTENER_H_