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/*
Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
Copyright (C) 2008 Holger Hans Peter Freyther
Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
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.
This class provides all functionality needed for loading images, style sheets and html
pages from the web. It has a memory cache for these objects.
*/
#include "config.h"
#include "FontCache.h"
#include "Font.h"
#include "FontDescription.h"
#include "FontPlatformData.h"
#include <utility>
#include <wtf/ListHashSet.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringHash.h>
#include <wtf/text/WTFString.h>
#include <QFont>
#include <QFontDatabase>
#include <QTextLayout>
using namespace WTF;
namespace WebCore {
void FontCache::platformInit()
{
}
static QRawFont rawFontForCharacters(const QString& string, const QRawFont& font)
{
QTextLayout layout(string);
layout.setRawFont(font);
layout.beginLayout();
layout.createLine();
layout.endLayout();
QList<QGlyphRun> glyphList = layout.glyphRuns();
ASSERT(glyphList.size() <= 1);
if (!glyphList.size())
return QRawFont();
const QGlyphRun& glyphs(glyphList.at(0));
return glyphs.rawFont();
}
PassRefPtr<SimpleFontData> FontCache::systemFallbackForCharacters(const FontDescription&, const SimpleFontData* originalFontData, bool, const UChar* characters, int length)
{
QString qstring = QString::fromRawData(reinterpret_cast<const QChar*>(characters), length);
QRawFont computedFont = rawFontForCharacters(qstring, originalFontData->getQtRawFont());
if (!computedFont.isValid())
return 0;
FontPlatformData alternateFont(computedFont);
return getCachedFontData(&alternateFont, DoNotRetain);
}
PassRefPtr<SimpleFontData> FontCache::getLastResortFallbackFont(const FontDescription& fontDescription, ShouldRetain shouldRetain)
{
const AtomicString fallbackFamily = QFont(fontDescription.firstFamily()).lastResortFamily();
FontPlatformData platformData(fontDescription, fallbackFamily);
return getCachedFontData(&platformData, shouldRetain);
}
void FontCache::getTraitsInFamily(const AtomicString&, Vector<unsigned>&)
{
}
PassOwnPtr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& familyName)
{
QFontDatabase db;
if (!db.hasFamily(familyName))
return nullptr;
return adoptPtr(new FontPlatformData(fontDescription, familyName));
}
} // namespace WebCore
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