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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "modules/presentation/NavigatorPresentation.h"
#include "core/frame/Navigator.h"
#include "modules/presentation/Presentation.h"
namespace blink {
NavigatorPresentation::NavigatorPresentation()
{
}
// static
const char* NavigatorPresentation::supplementName()
{
return "NavigatorPresentation";
}
// static
NavigatorPresentation& NavigatorPresentation::from(Navigator& navigator)
{
NavigatorPresentation* supplement = static_cast<NavigatorPresentation*>(HeapSupplement<Navigator>::from(navigator, supplementName()));
if (!supplement) {
supplement = new NavigatorPresentation();
provideTo(navigator, supplementName(), supplement);
}
return *supplement;
}
// static
Presentation* NavigatorPresentation::presentation(Navigator& navigator)
{
NavigatorPresentation& self = NavigatorPresentation::from(navigator);
if (!self.m_presentation) {
if (!navigator.frame())
return nullptr;
self.m_presentation = Presentation::create(navigator.frame());
}
return self.m_presentation;
}
DEFINE_TRACE(NavigatorPresentation)
{
visitor->trace(m_presentation);
HeapSupplement<Navigator>::trace(visitor);
}
} // namespace blink
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