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/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CachedSVGFont.h"
#if ENABLE(SVG_FONTS)
#include "FontDescription.h"
#include "FontPlatformData.h"
#include "SVGDocument.h"
#include "SVGFontData.h"
#include "SVGFontElement.h"
#include "SVGFontFaceElement.h"
#include "SharedBuffer.h"
#include "TextResourceDecoder.h"
#include "TypedElementDescendantIterator.h"
#if ENABLE(SVG_OTF_CONVERTER)
#include "SVGToOTFFontConversion.h"
#endif
namespace WebCore {
CachedSVGFont::CachedSVGFont(const ResourceRequest& resourceRequest, SessionID sessionID)
: CachedFont(resourceRequest, sessionID, SVGFontResource)
, m_externalSVGFontElement(nullptr)
{
}
RefPtr<Font> CachedSVGFont::createFont(const FontDescription& fontDescription, const AtomicString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings)
{
#if ENABLE(SVG_OTF_CONVERTER)
if (firstFontFace(remoteURI))
return CachedFont::createFont(fontDescription, remoteURI, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings);
#else
UNUSED_PARAM(fontFaceFeatures);
UNUSED_PARAM(fontFaceVariantSettings);
if (SVGFontFaceElement* firstFontFace = this->firstFontFace(remoteURI))
return Font::create(std::make_unique<SVGFontData>(firstFontFace), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
#endif
return nullptr;
}
FontPlatformData CachedSVGFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings)
{
if (m_externalSVGDocument)
return FontPlatformData(fontDescription.computedPixelSize(), bold, italic);
return CachedFont::platformDataFromCustomData(fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings);
}
bool CachedSVGFont::ensureCustomFontData(const AtomicString& remoteURI)
{
if (!m_externalSVGDocument && !errorOccurred() && !isLoading() && m_data) {
m_externalSVGDocument = SVGDocument::create(nullptr, URL());
RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("application/xml");
m_externalSVGDocument->setContent(decoder->decodeAndFlush(m_data->data(), m_data->size()));
if (decoder->sawError())
m_externalSVGDocument = nullptr;
#if ENABLE(SVG_OTF_CONVERTER)
if (m_externalSVGDocument)
maybeInitializeExternalSVGFontElement(remoteURI);
if (!m_externalSVGFontElement)
return false;
if (auto convertedFont = convertSVGToOTFFont(*m_externalSVGFontElement))
m_convertedFont = SharedBuffer::adoptVector(convertedFont.value());
else {
m_externalSVGDocument = nullptr;
return false;
}
#else
UNUSED_PARAM(remoteURI);
#endif
}
#if !ENABLE(SVG_OTF_CONVERTER)
return m_externalSVGDocument;
#else
return m_externalSVGDocument && CachedFont::ensureCustomFontData(m_convertedFont.get());
#endif
}
SVGFontElement* CachedSVGFont::getSVGFontById(const String& fontName) const
{
ASSERT(m_externalSVGDocument);
auto elements = descendantsOfType<SVGFontElement>(*m_externalSVGDocument);
if (fontName.isEmpty())
return elements.first();
for (auto& element : elements) {
if (element.getIdAttribute() == fontName)
return &element;
}
return nullptr;
}
SVGFontElement* CachedSVGFont::maybeInitializeExternalSVGFontElement(const AtomicString& remoteURI)
{
if (m_externalSVGFontElement)
return m_externalSVGFontElement;
String fragmentIdentifier;
size_t start = remoteURI.find('#');
if (start != notFound)
fragmentIdentifier = remoteURI.string().substring(start + 1);
m_externalSVGFontElement = getSVGFontById(fragmentIdentifier);
return m_externalSVGFontElement;
}
SVGFontFaceElement* CachedSVGFont::firstFontFace(const AtomicString& remoteURI)
{
if (!maybeInitializeExternalSVGFontElement(remoteURI))
return nullptr;
if (auto* firstFontFace = childrenOfType<SVGFontFaceElement>(*m_externalSVGFontElement).first())
return firstFontFace;
return nullptr;
}
}
#endif
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