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// Copyright 2014 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 CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
#define CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
#include <vector>
#include "base/strings/string16.h"
#include "content/common/content_export.h"
// Windows headers will redefine SendMessage.
#ifdef SendMessage
#undef SendMessage
#endif
namespace content {
struct MessagePortMessage;
struct TransferredMessagePort;
// Delegate used by MessagePortService to send messages to message ports to the
// correct renderer. Delegates are responsible for managing their own lifetime,
// and should call MessagePortService::OnMessagePortDelegateClosing if they are
// destroyed while there are still message ports associated with them.
class CONTENT_EXPORT MessagePortDelegate {
public:
// Sends a message to the given route. Implementations are responsible for
// updating MessagePortService with new routes for the sent message ports.
virtual void SendMessage(
int route_id,
const MessagePortMessage& message,
const std::vector<TransferredMessagePort>& sent_message_ports) = 0;
// Called when MessagePortService tried to send a message to a port, but
// instead added it to its queue because the port is currently configured to
// hold all its messages.
virtual void MessageWasHeld(int route_id) {}
// Requests messages to the given route to be queued.
virtual void SendMessagesAreQueued(int route_id) = 0;
protected:
virtual ~MessagePortDelegate() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
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