third_party/WebKit/Source/modules/speech/DOMWindowSpeechSynthesis.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "modules/speech/DOMWindowSpeechSynthesis.h"

#include "core/frame/LocalDOMWindow.h"
#include "core/frame/LocalFrame.h"
#include "wtf/PassRefPtr.h"

namespace blink {

DOMWindowSpeechSynthesis::DOMWindowSpeechSynthesis(LocalDOMWindow& window)
    : DOMWindowProperty(window.frame())
{
}

const char* DOMWindowSpeechSynthesis::supplementName()
{
    return "DOMWindowSpeechSynthesis";
}

// static
DOMWindowSpeechSynthesis& DOMWindowSpeechSynthesis::from(LocalDOMWindow& window)
{
    DOMWindowSpeechSynthesis* supplement = static_cast<DOMWindowSpeechSynthesis*>(Supplement<LocalDOMWindow>::from(window, supplementName()));
    if (!supplement) {
        supplement = new DOMWindowSpeechSynthesis(window);
        provideTo(window, supplementName(), supplement);
    }
    return *supplement;
}

// static
SpeechSynthesis* DOMWindowSpeechSynthesis::speechSynthesis(DOMWindow& window)
{
    return DOMWindowSpeechSynthesis::from(toLocalDOMWindow(window)).speechSynthesis();
}

SpeechSynthesis* DOMWindowSpeechSynthesis::speechSynthesis()
{
    if (!m_speechSynthesis && frame())
        m_speechSynthesis = SpeechSynthesis::create(frame()->domWindow()->getExecutionContext());
    return m_speechSynthesis;
}

DEFINE_TRACE(DOMWindowSpeechSynthesis)
{
    visitor->trace(m_speechSynthesis);
    Supplement<LocalDOMWindow>::trace(visitor);
    DOMWindowProperty::trace(visitor);
}

} // namespace blink