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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SpeechInput_h
#define SpeechInput_h
#if ENABLE(INPUT_SPEECH)
#include "SpeechInputListener.h"
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
class SpeechInputClient;
class SpeechInputListener;
// This class connects the input elements requiring speech input with the platform specific
// speech recognition engine. It provides methods for the input elements to activate speech
// recognition and methods for the speech recognition engine to return back the results.
class SpeechInput : public Noncopyable, public SpeechInputListener {
public:
SpeechInput(SpeechInputClient*);
virtual ~SpeechInput();
// Generates a unique ID for the given listener to be used for speech requests.
// This should be the first call made by listeners before anything else.
int registerListener(SpeechInputListener*);
// Invoked when the listener is done with recording or getting destroyed.
// Failure to unregister may result in crashes if there were any pending speech events.
void unregisterListener(int);
// Methods invoked by the input elements.
bool startRecognition(int);
void stopRecording(int);
void cancelRecognition(int);
// SpeechInputListener methods.
virtual void didCompleteRecording(int);
virtual void didCompleteRecognition(int);
virtual void setRecognitionResult(int, const String&);
private:
SpeechInputClient* m_client;
HashMap<int, SpeechInputListener*> m_listeners;
int m_nextListenerId;
};
} // namespace WebCore
#endif // ENABLE(INPUT_SPEECH)
#endif // SpeechInput_h
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