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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 "FontDescription.h"
#include "FontPlatformData.h"
#include "Font.h"
#include "PlatformString.h"
#include <utility>
#include <wtf/ListHashSet.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringHash.h>
#include <QFont>
#if HAVE(QRAWFONT)
#include <QTextLayout>
#endif
using namespace WTF;
namespace WebCore {
void FontCache::platformInit()
{
}
#if HAVE(QRAWFONT)
static QRawFont rawFontForCharacters(const QString& string, const QFont& requestedFont)
{
QFont font(requestedFont);
font.setStyleStrategy(QFont::NoFontMerging);
QTextLayout layout(string, font);
layout.beginLayout();
layout.createLine();
layout.endLayout();
QList<QGlyphs> glyphList = layout.glyphs();
ASSERT(glyphList.size() == 1);
const QGlyphs& glyphs(glyphList.at(0));
QVector<quint32> glyphIndexes = glyphs.glyphIndexes();
if (glyphIndexes.isEmpty())
return QRawFont();
return glyphs.font();
}
#endif
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
#if HAVE(QRAWFONT)
QString qstring = QString::fromRawData(reinterpret_cast<const QChar*>(characters), length);
QRawFont computedFont = rawFontForCharacters(qstring, font.font());
if (!computedFont.isValid())
return 0;
FontPlatformData alternateFont(computedFont);
return getCachedFontData(&alternateFont);
#else
Q_UNUSED(font);
Q_UNUSED(characters);
Q_UNUSED(length);
return 0;
#endif
}
SimpleFontData* FontCache::getSimilarFontPlatformData(const Font& font)
{
return 0;
}
SimpleFontData* FontCache::getLastResortFallbackFont(const FontDescription& fontDescription)
{
const AtomicString fallbackFamily = QFont(fontDescription.family().family()).lastResortFamily();
return getCachedFontData(new FontPlatformData(fontDescription, fallbackFamily));
}
void FontCache::getTraitsInFamily(const AtomicString&, Vector<unsigned>&)
{
}
FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& familyName)
{
return new FontPlatformData(fontDescription, familyName);
}
} // namespace WebCore
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