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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.
*/
#pragma once
#if ENABLE(SPEECH_SYNTHESIS)
#include "PlatformSpeechSynthesisUtterance.h"
#include "PlatformSpeechSynthesizer.h"
#include "SpeechSynthesisClient.h"
#include "SpeechSynthesisUtterance.h"
#include "SpeechSynthesisVoice.h"
#include <wtf/Deque.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class Document;
class PlatformSpeechSynthesizerClient;
class SpeechSynthesisVoice;
class SpeechSynthesis : public PlatformSpeechSynthesizerClient, public SpeechSynthesisClientObserver, public RefCounted<SpeechSynthesis> {
public:
static Ref<SpeechSynthesis> create(WeakPtr<SpeechSynthesisClient>, Document&);
bool pending() const;
bool speaking() const;
bool paused() const;
void speak(SpeechSynthesisUtterance&);
void cancel();
void pause();
void resume();
const Vector<Ref<SpeechSynthesisVoice>>& getVoices();
// Used in testing to use a mock platform synthesizer
WEBCORE_EXPORT void setPlatformSynthesizer(std::unique_ptr<PlatformSpeechSynthesizer>);
private:
SpeechSynthesis(WeakPtr<SpeechSynthesisClient>, Document&);
// PlatformSpeechSynthesizerClient override methods.
void voicesDidChange() override;
void didStartSpeaking(PlatformSpeechSynthesisUtterance&) override;
void didPauseSpeaking(PlatformSpeechSynthesisUtterance&) override;
void didResumeSpeaking(PlatformSpeechSynthesisUtterance&) override;
void didFinishSpeaking(PlatformSpeechSynthesisUtterance&) override;
void speakingErrorOccurred(PlatformSpeechSynthesisUtterance&) override;
void boundaryEventOccurred(PlatformSpeechSynthesisUtterance&, SpeechBoundary, unsigned charIndex) override;
// SpeechSynthesisClient override methods
void didStartSpeaking() override;
void didFinishSpeaking() override;
void didPauseSpeaking() override;
void didResumeSpeaking() override;
void speakingErrorOccurred() override;
void boundaryEventOccurred(bool wordBoundary, unsigned charIndex) override;
void voicesChanged() override;
void startSpeakingImmediately(SpeechSynthesisUtterance&);
void handleSpeakingCompleted(SpeechSynthesisUtterance&, bool errorOccurred);
void fireEvent(const AtomString& type, SpeechSynthesisUtterance&, unsigned long charIndex, const String& name);
#if PLATFORM(IOS_FAMILY)
// Restrictions to change default behaviors.
enum BehaviorRestrictionFlags {
NoRestrictions = 0,
RequireUserGestureForSpeechStartRestriction = 1 << 0,
};
typedef unsigned BehaviorRestrictions;
bool userGestureRequiredForSpeechStart() const { return m_restrictions & RequireUserGestureForSpeechStartRestriction; }
void removeBehaviorRestriction(BehaviorRestrictions restriction) { m_restrictions &= ~restriction; }
#endif
PlatformSpeechSynthesizer& ensurePlatformSpeechSynthesizer();
std::unique_ptr<PlatformSpeechSynthesizer> m_platformSpeechSynthesizer;
Vector<Ref<SpeechSynthesisVoice>> m_voiceList;
RefPtr<SpeechSynthesisUtterance> m_currentSpeechUtterance;
Deque<Ref<SpeechSynthesisUtterance>> m_utteranceQueue;
bool m_isPaused;
#if PLATFORM(IOS_FAMILY)
BehaviorRestrictions m_restrictions;
#endif
WeakPtr<SpeechSynthesisClient> m_speechSynthesisClient;
};
} // namespace WebCore
#endif // ENABLE(SPEECH_SYNTHESIS)
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