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/*
* Copyright (C) 2006-2023 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"
#include "ElementChildIteratorInlines.h"
#include "FontCreationContext.h"
#include "FontDescription.h"
#include "FontPlatformData.h"
#include "SVGDocument.h"
#include "SVGElementTypeHelpers.h"
#include "SVGFontElement.h"
#include "SVGFontFaceElement.h"
#include "SVGToOTFFontConversion.h"
#include "ScriptDisallowedScope.h"
#include "Settings.h"
#include "SharedBuffer.h"
#include "TextResourceDecoder.h"
#include "TypedElementDescendantIteratorInlines.h"
namespace WebCore {
CachedSVGFont::CachedSVGFont(CachedResourceRequest&& request, PAL::SessionID sessionID, const CookieJar* cookieJar, const Settings& settings)
: CachedFont(WTFMove(request), sessionID, cookieJar, Type::SVGFontResource)
, m_externalSVGFontElement(nullptr)
, m_settings(settings)
{
}
CachedSVGFont::CachedSVGFont(CachedResourceRequest&& request, CachedSVGFont& resource)
: CachedSVGFont(WTFMove(request), resource.sessionID(), resource.cookieJar(), resource.m_settings)
{
}
RefPtr<Font> CachedSVGFont::createFont(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, const FontCreationContext& fontCreationContext)
{
ASSERT(firstFontFace());
return CachedFont::createFont(fontDescription, syntheticBold, syntheticItalic, fontCreationContext);
}
FontPlatformData CachedSVGFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontCreationContext& fontCreationContext)
{
if (m_externalSVGDocument)
return FontPlatformData(fontDescription.computedSize(), bold, italic); // FIXME: Why are we creating a bogus font here?
return CachedFont::platformDataFromCustomData(fontDescription, bold, italic, fontCreationContext);
}
bool CachedSVGFont::ensureCustomFontData()
{
if (!m_externalSVGDocument && !errorOccurred() && !isLoading() && m_data) {
bool sawError = false;
{
// We may get here during render tree updates when events are forbidden.
// Frameless document can't run scripts or call back to the client so this is safe.
auto externalSVGDocument = SVGDocument::create(nullptr, m_settings, URL());
auto decoder = TextResourceDecoder::create("application/xml"_s);
ScriptDisallowedScope::DisableAssertionsInScope disabledScope;
externalSVGDocument->setContent(decoder->decodeAndFlush(m_data->makeContiguous()->data(), m_data->size()));
sawError = decoder->sawError();
m_externalSVGDocument = WTFMove(externalSVGDocument);
}
if (sawError)
m_externalSVGDocument = nullptr;
if (m_externalSVGDocument)
maybeInitializeExternalSVGFontElement();
if (!m_externalSVGFontElement || !firstFontFace())
return false;
if (auto convertedFont = convertSVGToOTFFont(*m_externalSVGFontElement))
m_convertedFont = SharedBuffer::create(WTFMove(convertedFont.value()));
else {
m_externalSVGDocument = nullptr;
m_externalSVGFontElement = nullptr;
return false;
}
}
return m_externalSVGDocument && CachedFont::ensureCustomFontData(m_convertedFont.get());
}
SVGFontElement* CachedSVGFont::getSVGFontById(const AtomString& 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()
{
if (m_externalSVGFontElement)
return m_externalSVGFontElement;
m_externalSVGFontElement = getSVGFontById(url().fragmentIdentifier().toAtomString());
return m_externalSVGFontElement;
}
SVGFontFaceElement* CachedSVGFont::firstFontFace()
{
if (!maybeInitializeExternalSVGFontElement())
return nullptr;
if (auto* firstFontFace = childrenOfType<SVGFontFaceElement>(*m_externalSVGFontElement).first())
return firstFontFace;
return nullptr;
}
}
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