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      1 /*
      2  * Copyright (C) 2013 Apple Computer, Inc.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef PlatformSpeechSynthesizer_h
     27 #define PlatformSpeechSynthesizer_h
     28 
     29 #include "platform/PlatformExport.h"
     30 #include "platform/speech/PlatformSpeechSynthesisVoice.h"
     31 #include "wtf/PassOwnPtr.h"
     32 #include "wtf/Vector.h"
     33 
     34 namespace blink {
     35 class WebSpeechSynthesizer;
     36 class WebSpeechSynthesizerClient;
     37 }
     38 
     39 namespace WebCore {
     40 
     41 enum SpeechBoundary {
     42     SpeechWordBoundary,
     43     SpeechSentenceBoundary
     44 };
     45 
     46 class PlatformSpeechSynthesisUtterance;
     47 
     48 class PlatformSpeechSynthesizerClient {
     49 public:
     50     virtual void didStartSpeaking(PassRefPtr<PlatformSpeechSynthesisUtterance>) = 0;
     51     virtual void didFinishSpeaking(PassRefPtr<PlatformSpeechSynthesisUtterance>) = 0;
     52     virtual void didPauseSpeaking(PassRefPtr<PlatformSpeechSynthesisUtterance>) = 0;
     53     virtual void didResumeSpeaking(PassRefPtr<PlatformSpeechSynthesisUtterance>) = 0;
     54     virtual void speakingErrorOccurred(PassRefPtr<PlatformSpeechSynthesisUtterance>) = 0;
     55     virtual void boundaryEventOccurred(PassRefPtr<PlatformSpeechSynthesisUtterance>, SpeechBoundary, unsigned charIndex) = 0;
     56     virtual void voicesDidChange() = 0;
     57 protected:
     58     virtual ~PlatformSpeechSynthesizerClient() { }
     59 };
     60 
     61 class PLATFORM_EXPORT PlatformSpeechSynthesizer {
     62     WTF_MAKE_NONCOPYABLE(PlatformSpeechSynthesizer);
     63 public:
     64     static PassOwnPtr<PlatformSpeechSynthesizer> create(PlatformSpeechSynthesizerClient*);
     65 
     66     virtual ~PlatformSpeechSynthesizer();
     67 
     68     const Vector<RefPtr<PlatformSpeechSynthesisVoice> >& voiceList() const { return m_voiceList; }
     69     virtual void speak(PassRefPtr<PlatformSpeechSynthesisUtterance>);
     70     virtual void pause();
     71     virtual void resume();
     72     virtual void cancel();
     73 
     74     PlatformSpeechSynthesizerClient* client() const { return m_speechSynthesizerClient; }
     75 
     76     void setVoiceList(Vector<RefPtr<PlatformSpeechSynthesisVoice> >&);
     77 
     78 protected:
     79     virtual void initializeVoiceList();
     80     explicit PlatformSpeechSynthesizer(PlatformSpeechSynthesizerClient*);
     81     Vector<RefPtr<PlatformSpeechSynthesisVoice> > m_voiceList;
     82 
     83 private:
     84     PlatformSpeechSynthesizerClient* m_speechSynthesizerClient;
     85 
     86     OwnPtr<blink::WebSpeechSynthesizer> m_webSpeechSynthesizer;
     87     OwnPtr<blink::WebSpeechSynthesizerClient> m_webSpeechSynthesizerClient;
     88 };
     89 
     90 } // namespace WebCore
     91 
     92 #endif // PlatformSpeechSynthesizer_h
     93