| /* |
| * Copyright (C) 2006-2021 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 "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 "TypedElementDescendantIterator.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, const AtomString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontCreationContext& fontCreationContext) |
| { |
| ASSERT(firstFontFace(remoteURI)); |
| return CachedFont::createFont(fontDescription, remoteURI, syntheticBold, syntheticItalic, fontCreationContext); |
| } |
| |
| FontPlatformData CachedSVGFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontCreationContext& fontCreationContext) |
| { |
| if (m_externalSVGDocument) |
| return FontPlatformData(fontDescription.computedPixelSize(), bold, italic); // FIXME: This doesn't seem right. |
| return CachedFont::platformDataFromCustomData(fontDescription, bold, italic, fontCreationContext); |
| } |
| |
| bool CachedSVGFont::ensureCustomFontData(const AtomString& remoteURI) |
| { |
| 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(remoteURI); |
| if (!m_externalSVGFontElement || !firstFontFace(remoteURI)) |
| 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(const AtomString& remoteURI) |
| { |
| if (m_externalSVGFontElement) |
| return m_externalSVGFontElement; |
| AtomString fragmentIdentifier; |
| size_t start = remoteURI.find('#'); |
| if (start != notFound) |
| fragmentIdentifier = StringView(remoteURI).substring(start + 1).toAtomString(); |
| m_externalSVGFontElement = getSVGFontById(fragmentIdentifier); |
| return m_externalSVGFontElement; |
| } |
| |
| SVGFontFaceElement* CachedSVGFont::firstFontFace(const AtomString& remoteURI) |
| { |
| if (!maybeInitializeExternalSVGFontElement(remoteURI)) |
| return nullptr; |
| |
| if (auto* firstFontFace = childrenOfType<SVGFontFaceElement>(*m_externalSVGFontElement).first()) |
| return firstFontFace; |
| return nullptr; |
| } |
| |
| } |