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 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * 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.
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 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 */

#ifndef WebSpeechInputController_h
#define WebSpeechInputController_h

#include "WebCommon.h"

namespace WebKit {

struct WebRect;

// Provides an embedder API called by WebKit.
class WebSpeechInputController {
public:
    // Starts speech recognition. Speech will get recorded until the endpointer detects silence,
    // runs to the limit or stopRecording is called. Progress indications and the recognized
    // text are returned via the listener interface.
    virtual bool startRecognition(int requestId, const WebRect&)
    {
        WEBKIT_ASSERT_NOT_REACHED();
        return false;
    }

    // Cancels an ongoing recognition and discards any audio recorded so far. No partial
    // recognition results are returned to the listener.
    virtual void cancelRecognition(int) { WEBKIT_ASSERT_NOT_REACHED(); }

    // Stops audio recording and performs recognition with the audio recorded until now
    // (does not discard audio). This is an optional call and is typically invoked if the user
    // wants to stop recording audio as soon as they finished speaking. Otherwise, the speech
    // recording 'endpointer' should detect silence in the input and stop recording automatically.
    // Call startRecognition() to record audio and recognize speech again.
    virtual void stopRecording(int) { WEBKIT_ASSERT_NOT_REACHED(); }

protected:
    virtual ~WebSpeechInputController() { }
};

} // namespace WebKit

#endif // WebSpeechInputController_h