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| 1 // Copyright 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef SYNC_JS_JS_CONTROLLER_H_ | 5 #ifndef COMPONENTS_SYNC_JS_JS_CONTROLLER_H_ |
| 6 #define SYNC_JS_JS_CONTROLLER_H_ | 6 #define COMPONENTS_SYNC_JS_JS_CONTROLLER_H_ |
| 7 | 7 |
| 8 // See README.js for design comments. | 8 // See README.js for design comments. |
| 9 | 9 |
| 10 #include <string> | 10 #include <string> |
| 11 | 11 |
| 12 #include "sync/base/sync_export.h" | 12 #include "components/sync/base/sync_export.h" |
| 13 | 13 |
| 14 namespace syncer { | 14 namespace syncer { |
| 15 | 15 |
| 16 class JsEventHandler; | 16 class JsEventHandler; |
| 17 template <typename T> class WeakHandle; | 17 template <typename T> |
| 18 class WeakHandle; |
| 18 | 19 |
| 19 // An interface for objects that JsEventHandlers directly interact | 20 // An interface for objects that JsEventHandlers directly interact |
| 20 // with. JsEventHandlers can add themselves to receive events and | 21 // with. JsEventHandlers can add themselves to receive events and |
| 21 // also send messages which will eventually reach the backend. | 22 // also send messages which will eventually reach the backend. |
| 22 class SYNC_EXPORT JsController { | 23 class SYNC_EXPORT JsController { |
| 23 public: | 24 public: |
| 24 // Adds an event handler which will start receiving JS events (not | 25 // Adds an event handler which will start receiving JS events (not |
| 25 // immediately, so this can be called in the handler's constructor). | 26 // immediately, so this can be called in the handler's constructor). |
| 26 // Multiple event handlers are supported, but each event handler | 27 // Multiple event handlers are supported, but each event handler |
| 27 // must be added at most once. | 28 // must be added at most once. |
| 28 // | 29 // |
| 29 // Ideally, we'd take WeakPtrs, but we need the raw pointer values | 30 // Ideally, we'd take WeakPtrs, but we need the raw pointer values |
| 30 // to be able to look them up for removal. | 31 // to be able to look them up for removal. |
| 31 virtual void AddJsEventHandler(JsEventHandler* event_handler) = 0; | 32 virtual void AddJsEventHandler(JsEventHandler* event_handler) = 0; |
| 32 | 33 |
| 33 // Removes the given event handler if it has been added. It will | 34 // Removes the given event handler if it has been added. It will |
| 34 // immediately stop receiving any JS events. | 35 // immediately stop receiving any JS events. |
| 35 virtual void RemoveJsEventHandler(JsEventHandler* event_handler) = 0; | 36 virtual void RemoveJsEventHandler(JsEventHandler* event_handler) = 0; |
| 36 | 37 |
| 37 protected: | 38 protected: |
| 38 virtual ~JsController() {} | 39 virtual ~JsController() {} |
| 39 }; | 40 }; |
| 40 | 41 |
| 41 } // namespace syncer | 42 } // namespace syncer |
| 42 | 43 |
| 43 #endif // SYNC_JS_JS_CONTROLLER_H_ | 44 #endif // COMPONENTS_SYNC_JS_JS_CONTROLLER_H_ |
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