1 // Copyright (c) 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 CONTENT_RENDERER_SPEECH_RECOGNITION_DISPATCHER_H_ 6 #define CONTENT_RENDERER_SPEECH_RECOGNITION_DISPATCHER_H_ 7 8 #include <map> 9 10 #include "base/basictypes.h" 11 #include "content/public/common/speech_recognition_result.h" 12 #include "content/public/renderer/render_view_observer.h" 13 #include "third_party/WebKit/public/platform/WebVector.h" 14 #include "third_party/WebKit/public/web/WebSpeechRecognitionHandle.h" 15 #include "third_party/WebKit/public/web/WebSpeechRecognizer.h" 16 17 namespace content { 18 class RenderViewImpl; 19 struct SpeechRecognitionError; 20 struct SpeechRecognitionResult; 21 22 // SpeechRecognitionDispatcher is a delegate for methods used by WebKit for 23 // scripted JS speech APIs. It's the complement of 24 // SpeechRecognitionDispatcherHost (owned by RenderViewHost). 25 class SpeechRecognitionDispatcher : public RenderViewObserver, 26 public blink::WebSpeechRecognizer { 27 public: 28 explicit SpeechRecognitionDispatcher(RenderViewImpl* render_view); 29 virtual ~SpeechRecognitionDispatcher(); 30 31 // Aborts all speech recognitions. 32 void AbortAllRecognitions(); 33 34 private: 35 // RenderViewObserver implementation. 36 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 37 38 // blink::WebSpeechRecognizer implementation. 39 virtual void start(const blink::WebSpeechRecognitionHandle&, 40 const blink::WebSpeechRecognitionParams&, 41 blink::WebSpeechRecognizerClient*) OVERRIDE; 42 virtual void stop(const blink::WebSpeechRecognitionHandle&, 43 blink::WebSpeechRecognizerClient*) OVERRIDE; 44 virtual void abort(const blink::WebSpeechRecognitionHandle&, 45 blink::WebSpeechRecognizerClient*) OVERRIDE; 46 47 void OnRecognitionStarted(int request_id); 48 void OnAudioStarted(int request_id); 49 void OnSoundStarted(int request_id); 50 void OnSoundEnded(int request_id); 51 void OnAudioEnded(int request_id); 52 void OnErrorOccurred(int request_id, const SpeechRecognitionError& error); 53 void OnRecognitionEnded(int request_id); 54 void OnResultsRetrieved(int request_id, 55 const SpeechRecognitionResults& result); 56 57 int GetOrCreateIDForHandle(const blink::WebSpeechRecognitionHandle& handle); 58 bool HandleExists(const blink::WebSpeechRecognitionHandle& handle); 59 const blink::WebSpeechRecognitionHandle& GetHandleFromID(int handle_id); 60 61 // The WebKit client class that we use to send events back to the JS world. 62 blink::WebSpeechRecognizerClient* recognizer_client_; 63 64 typedef std::map<int, blink::WebSpeechRecognitionHandle> HandleMap; 65 HandleMap handle_map_; 66 int next_id_; 67 68 DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionDispatcher); 69 }; 70 71 } // namespace content 72 73 #endif // CONTENT_RENDERER_SPEECH_RECOGNITION_DISPATCHER_H_ 74