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/*
* Copyright (C) 2013 Apple Computer, 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 PlatformSpeechSynthesizer_h
#define PlatformSpeechSynthesizer_h
#include "platform/PlatformExport.h"
#include "platform/heap/Handle.h"
#include "platform/speech/PlatformSpeechSynthesisVoice.h"
#include "wtf/Vector.h"
#include <memory>
namespace blink {
enum SpeechBoundary { SpeechWordBoundary, SpeechSentenceBoundary };
class PlatformSpeechSynthesisUtterance;
class WebSpeechSynthesizer;
class WebSpeechSynthesizerClientImpl;
class PLATFORM_EXPORT PlatformSpeechSynthesizerClient
: public GarbageCollectedMixin {
public:
virtual void didStartSpeaking(PlatformSpeechSynthesisUtterance*) = 0;
virtual void didFinishSpeaking(PlatformSpeechSynthesisUtterance*) = 0;
virtual void didPauseSpeaking(PlatformSpeechSynthesisUtterance*) = 0;
virtual void didResumeSpeaking(PlatformSpeechSynthesisUtterance*) = 0;
virtual void speakingErrorOccurred(PlatformSpeechSynthesisUtterance*) = 0;
virtual void boundaryEventOccurred(PlatformSpeechSynthesisUtterance*,
SpeechBoundary,
unsigned charIndex) = 0;
virtual void voicesDidChange() = 0;
protected:
virtual ~PlatformSpeechSynthesizerClient() {}
};
class PLATFORM_EXPORT PlatformSpeechSynthesizer
: public GarbageCollectedFinalized<PlatformSpeechSynthesizer> {
WTF_MAKE_NONCOPYABLE(PlatformSpeechSynthesizer);
public:
static PlatformSpeechSynthesizer* create(PlatformSpeechSynthesizerClient*);
virtual ~PlatformSpeechSynthesizer();
const Vector<RefPtr<PlatformSpeechSynthesisVoice>>& voiceList() const {
return m_voiceList;
}
virtual void speak(PlatformSpeechSynthesisUtterance*);
virtual void pause();
virtual void resume();
virtual void cancel();
PlatformSpeechSynthesizerClient* client() const {
return m_speechSynthesizerClient;
}
void setVoiceList(Vector<RefPtr<PlatformSpeechSynthesisVoice>>&);
// Eager finalization is required to promptly release the owned
// WebSpeechSynthesizer.
//
// If not and delayed until lazily swept, m_webSpeechSynthesizerClient may end
// up being lazily swept first (i.e., before this PlatformSpeechSynthesizer),
// leaving m_webSpeechSynthesizer with a dangling pointer to a finalized
// object -- WebSpeechSynthesizer embedder implementations calling
// notification methods in the other directions by way of
// m_webSpeechSynthesizerClient. Eagerly releasing WebSpeechSynthesizer
// prevents such unsafe accesses.
EAGERLY_FINALIZE();
DECLARE_VIRTUAL_TRACE();
protected:
explicit PlatformSpeechSynthesizer(PlatformSpeechSynthesizerClient*);
virtual void initializeVoiceList();
Vector<RefPtr<PlatformSpeechSynthesisVoice>> m_voiceList;
private:
Member<PlatformSpeechSynthesizerClient> m_speechSynthesizerClient;
std::unique_ptr<WebSpeechSynthesizer> m_webSpeechSynthesizer;
Member<WebSpeechSynthesizerClientImpl> m_webSpeechSynthesizerClient;
};
} // namespace blink
#endif // PlatformSpeechSynthesizer_h
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