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/*
* Copyright (C) 2013 Google, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef CSSCustomFontData_h
#define CSSCustomFontData_h
#include "core/css/CSSFontFaceSource.h"
#include "platform/fonts/CustomFontData.h"
#include "platform/heap/Handle.h"
namespace blink {
class CSSCustomFontData final : public CustomFontData {
public:
enum FallbackVisibility { InvisibleFallback, VisibleFallback };
static PassRefPtr<CSSCustomFontData> create(RemoteFontFaceSource* source, FallbackVisibility visibility)
{
return adoptRef(new CSSCustomFontData(source, visibility));
}
~CSSCustomFontData() override { }
bool shouldSkipDrawing() const override
{
if (m_fontFaceSource)
m_fontFaceSource->paintRequested();
return m_fallbackVisibility == InvisibleFallback && m_isLoading;
}
void beginLoadIfNeeded() const override
{
if (!m_isLoading && m_fontFaceSource) {
m_isLoading = true;
m_fontFaceSource->beginLoadIfNeeded();
}
}
bool isLoading() const override { return m_isLoading; }
bool isLoadingFallback() const override { return true; }
void clearFontFaceSource() override { m_fontFaceSource = 0; }
private:
CSSCustomFontData(RemoteFontFaceSource* source, FallbackVisibility visibility)
: m_fontFaceSource(source)
, m_fallbackVisibility(visibility)
, m_isLoading(false)
{
if (source)
m_isLoading = source->isLoading();
}
// TODO(Oilpan): consider moving (Custom)FontFace hierarchy to the heap,
// thereby making this reference a Member<>.
RawPtrWillBeWeakPersistent<RemoteFontFaceSource> m_fontFaceSource;
FallbackVisibility m_fallbackVisibility;
mutable bool m_isLoading;
};
} // namespace blink
#endif // CSSCustomFontData_h
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