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/*
* Copyright (C) 2013 Apple 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 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 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
#if ENABLE(SPEECH_SYNTHESIS)
#include "PlatformSpeechSynthesisVoice.h"
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#if PLATFORM(COCOA)
#include <wtf/RetainPtr.h>
OBJC_CLASS WebSpeechSynthesisWrapper;
#endif
namespace WebCore {
enum class SpeechBoundary : uint8_t {
SpeechWordBoundary,
SpeechSentenceBoundary
};
#if USE(GSTREAMER)
class GstSpeechSynthesisWrapper;
#endif
class PlatformSpeechSynthesisUtterance;
class PlatformSpeechSynthesizerClient {
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, unsigned charLength) = 0;
virtual void voicesDidChange() = 0;
protected:
virtual ~PlatformSpeechSynthesizerClient() = default;
};
class WEBCORE_EXPORT PlatformSpeechSynthesizer : public RefCounted<PlatformSpeechSynthesizer> {
WTF_MAKE_FAST_ALLOCATED;
public:
WEBCORE_EXPORT static Ref<PlatformSpeechSynthesizer> create(PlatformSpeechSynthesizerClient&);
// FIXME: We have multiple virtual functions just so we can support a mock for testing.
// Seems wasteful. Would be nice to find a better way.
WEBCORE_EXPORT virtual ~PlatformSpeechSynthesizer();
const Vector<RefPtr<PlatformSpeechSynthesisVoice>>& voiceList() const;
virtual void speak(RefPtr<PlatformSpeechSynthesisUtterance>&&);
virtual void pause();
virtual void resume();
virtual void cancel();
virtual void resetState();
PlatformSpeechSynthesizerClient& client() const { return m_speechSynthesizerClient; }
protected:
explicit PlatformSpeechSynthesizer(PlatformSpeechSynthesizerClient&);
Vector<RefPtr<PlatformSpeechSynthesisVoice>> m_voiceList;
private:
virtual void initializeVoiceList();
bool m_voiceListIsInitialized { false };
PlatformSpeechSynthesizerClient& m_speechSynthesizerClient;
#if PLATFORM(COCOA)
RetainPtr<WebSpeechSynthesisWrapper> m_platformSpeechWrapper;
#elif USE(GSTREAMER)
std::unique_ptr<GstSpeechSynthesisWrapper> m_platformSpeechWrapper { nullptr };
#endif
};
} // namespace WebCore
#endif // ENABLE(SPEECH_SYNTHESIS)
#endif // PlatformSpeechSynthesizer_h
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