content/renderer/speech_recognition_dispatcher.h

   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_