141 lines
5.7 KiB
C++
141 lines
5.7 KiB
C++
/*
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* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
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* Copyright (C) 2009 Torch Mobile, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CachedSVGFont.h"
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#include "FontDescription.h"
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#include "FontPlatformData.h"
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#include "SVGDocument.h"
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#include "SVGFontElement.h"
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#include "SVGFontFaceElement.h"
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#include "SVGToOTFFontConversion.h"
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#include "ScriptDisallowedScope.h"
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#include "Settings.h"
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#include "SharedBuffer.h"
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#include "TextResourceDecoder.h"
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#include "TypedElementDescendantIterator.h"
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namespace WebCore {
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CachedSVGFont::CachedSVGFont(CachedResourceRequest&& request, PAL::SessionID sessionID, const CookieJar* cookieJar, const Settings& settings)
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: CachedFont(WTFMove(request), sessionID, cookieJar, Type::SVGFontResource)
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, m_externalSVGFontElement(nullptr)
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, m_settings(settings)
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{
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}
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CachedSVGFont::CachedSVGFont(CachedResourceRequest&& request, CachedSVGFont& resource)
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: CachedSVGFont(WTFMove(request), resource.sessionID(), resource.cookieJar(), resource.m_settings)
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{
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}
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RefPtr<Font> CachedSVGFont::createFont(const FontDescription& fontDescription, const AtomString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
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{
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ASSERT(firstFontFace(remoteURI));
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return CachedFont::createFont(fontDescription, remoteURI, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceCapabilities);
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}
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FontPlatformData CachedSVGFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
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{
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if (m_externalSVGDocument)
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return FontPlatformData(fontDescription.computedPixelSize(), bold, italic);
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return CachedFont::platformDataFromCustomData(fontDescription, bold, italic, fontFaceFeatures, fontFaceCapabilities);
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}
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bool CachedSVGFont::ensureCustomFontData(const AtomString& remoteURI)
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{
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if (!m_externalSVGDocument && !errorOccurred() && !isLoading() && m_data) {
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bool sawError = false;
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{
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// We may get here during render tree updates when events are forbidden.
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// Frameless document can't run scripts or call back to the client so this is safe.
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m_externalSVGDocument = SVGDocument::create(nullptr, m_settings, URL());
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auto decoder = TextResourceDecoder::create("application/xml");
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ScriptDisallowedScope::DisableAssertionsInScope disabledScope;
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m_externalSVGDocument->setContent(decoder->decodeAndFlush(m_data->data(), m_data->size()));
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sawError = decoder->sawError();
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}
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if (sawError)
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m_externalSVGDocument = nullptr;
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if (m_externalSVGDocument)
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maybeInitializeExternalSVGFontElement(remoteURI);
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if (!m_externalSVGFontElement || !firstFontFace(remoteURI))
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return false;
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if (auto convertedFont = convertSVGToOTFFont(*m_externalSVGFontElement))
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m_convertedFont = SharedBuffer::create(WTFMove(convertedFont.value()));
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else {
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m_externalSVGDocument = nullptr;
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m_externalSVGFontElement = nullptr;
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return false;
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}
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}
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return m_externalSVGDocument && CachedFont::ensureCustomFontData(m_convertedFont.get());
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}
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SVGFontElement* CachedSVGFont::getSVGFontById(const String& fontName) const
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{
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ASSERT(m_externalSVGDocument);
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auto elements = descendantsOfType<SVGFontElement>(*m_externalSVGDocument);
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if (fontName.isEmpty())
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return elements.first();
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for (auto& element : elements) {
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if (element.getIdAttribute() == fontName)
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return &element;
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}
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return nullptr;
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}
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SVGFontElement* CachedSVGFont::maybeInitializeExternalSVGFontElement(const AtomString& remoteURI)
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{
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if (m_externalSVGFontElement)
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return m_externalSVGFontElement;
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String fragmentIdentifier;
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size_t start = remoteURI.find('#');
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if (start != notFound)
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fragmentIdentifier = remoteURI.string().substring(start + 1);
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m_externalSVGFontElement = getSVGFontById(fragmentIdentifier);
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return m_externalSVGFontElement;
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}
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SVGFontFaceElement* CachedSVGFont::firstFontFace(const AtomString& remoteURI)
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{
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if (!maybeInitializeExternalSVGFontElement(remoteURI))
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return nullptr;
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if (auto* firstFontFace = childrenOfType<SVGFontFaceElement>(*m_externalSVGFontElement).first())
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return firstFontFace;
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return nullptr;
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}
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}
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