1// Copyright 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef SYNC_JS_JS_BACKEND_H_
6#define SYNC_JS_JS_BACKEND_H_
7
8// See README.js for design comments.
9
10#include <string>
11
12#include "sync/base/sync_export.h"
13
14namespace syncer {
15
16class JsArgList;
17class JsEventHandler;
18class JsReplyHandler;
19template <typename T> class WeakHandle;
20
21// Interface representing the backend of chrome://sync-internals.  A
22// JsBackend can handle messages and can emit events to a
23// JsEventHandler.
24class SYNC_EXPORT_PRIVATE JsBackend {
25 public:
26  // Starts emitting events to the given handler, if initialized.
27  virtual void SetJsEventHandler(
28      const WeakHandle<JsEventHandler>& event_handler) = 0;
29
30  // Processes the given message and replies via the given handler, if
31  // initialized.
32  virtual void ProcessJsMessage(
33      const std::string& name, const JsArgList& args,
34      const WeakHandle<JsReplyHandler>& reply_handler) = 0;
35
36 protected:
37  virtual ~JsBackend() {}
38};
39
40}  // namespace syncer
41
42#endif  // SYNC_JS_JS_BACKEND_H_
43