152 lines
5.2 KiB
C++
152 lines
5.2 KiB
C++
/*
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* (C) 1999-2003 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2004-2021 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "CSSImageValue.h"
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#include "CSSMarkup.h"
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#include "CSSPrimitiveValue.h"
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#include "CSSValueKeywords.h"
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#include "CachedImage.h"
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#include "CachedResourceLoader.h"
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#include "CachedResourceRequest.h"
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#include "CachedResourceRequestInitiators.h"
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#include "DeprecatedCSSOMPrimitiveValue.h"
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#include "Document.h"
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#include "Element.h"
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#include "StyleBuilderState.h"
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namespace WebCore {
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static bool operator==(const ResolvedURL& a, const ResolvedURL& b)
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{
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return a.specifiedURLString == b.specifiedURLString && a.resolvedURL == b.resolvedURL;
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}
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static ResolvedURL makeResolvedURL(URL&& resolvedURL)
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{
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auto string = resolvedURL.string();
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return { WTFMove(string), WTFMove(resolvedURL) };
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}
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CSSImageValue::CSSImageValue(ResolvedURL&& location, LoadedFromOpaqueSource loadedFromOpaqueSource)
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: CSSValue(ImageClass)
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, m_location(WTFMove(location))
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, m_loadedFromOpaqueSource(loadedFromOpaqueSource)
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{
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}
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CSSImageValue::CSSImageValue(CachedImage& image)
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: CSSValue(ImageClass)
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, m_location { image.url().string(), image.url() }
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, m_cachedImage(&image)
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{
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}
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Ref<CSSImageValue> CSSImageValue::create(ResolvedURL&& location, LoadedFromOpaqueSource loadedFromOpaqueSource)
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{
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return adoptRef(*new CSSImageValue(WTFMove(location), loadedFromOpaqueSource));
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}
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Ref<CSSImageValue> CSSImageValue::create(URL&& imageURL, LoadedFromOpaqueSource loadedFromOpaqueSource)
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{
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return create(makeResolvedURL(WTFMove(imageURL)), loadedFromOpaqueSource);
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}
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Ref<CSSImageValue> CSSImageValue::create(CachedImage& image)
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{
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return adoptRef(*new CSSImageValue(image));
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}
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CSSImageValue::~CSSImageValue() = default;
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bool CSSImageValue::isPending() const
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{
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return !m_cachedImage;
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}
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URL CSSImageValue::reresolvedURL(const Document& document) const
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{
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// Re-resolving the URL is important for cases where resolvedURL is still not an absolute URL.
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// This can happen if there was no absolute base URL when the value was created, like a style from a document without a base URL.
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return document.completeURL(m_location.resolvedURL.string());
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}
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Ref<CSSImageValue> CSSImageValue::valueWithStylesResolved(Style::BuilderState& state)
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{
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auto location = makeResolvedURL(reresolvedURL(state.document()));
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if (m_location == location)
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return *this;
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auto result = create(WTFMove(location), m_loadedFromOpaqueSource);
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result->m_cachedImage = m_cachedImage;
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result->m_initiatorName = m_initiatorName;
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result->m_unresolvedValue = this;
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return result;
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}
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CachedImage* CSSImageValue::loadImage(CachedResourceLoader& loader, const ResourceLoaderOptions& options)
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{
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if (!m_cachedImage) {
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ResourceLoaderOptions loadOptions = options;
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loadOptions.loadedFromOpaqueSource = m_loadedFromOpaqueSource;
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CachedResourceRequest request(ResourceRequest(reresolvedURL(*loader.document())), loadOptions);
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if (m_initiatorName.isEmpty())
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request.setInitiator(cachedResourceRequestInitiators().css);
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else
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request.setInitiator(m_initiatorName);
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if (options.mode == FetchOptions::Mode::Cors) {
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ASSERT(loader.document());
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request.updateForAccessControl(*loader.document());
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}
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m_cachedImage = loader.requestImage(WTFMove(request)).value_or(nullptr);
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for (auto imageValue = this; (imageValue = imageValue->m_unresolvedValue.get()); )
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imageValue->m_cachedImage = m_cachedImage;
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}
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return m_cachedImage.value().get();
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}
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bool CSSImageValue::traverseSubresources(const WTF::Function<bool (const CachedResource&)>& handler) const
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{
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return m_cachedImage.value_or(nullptr) && handler(**m_cachedImage);
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}
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bool CSSImageValue::equals(const CSSImageValue& other) const
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{
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return m_location == other.m_location;
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}
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String CSSImageValue::customCSSText() const
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{
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return serializeURL(m_location.specifiedURLString);
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}
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Ref<DeprecatedCSSOMValue> CSSImageValue::createDeprecatedCSSOMWrapper(CSSStyleDeclaration& styleDeclaration) const
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{
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// NOTE: We expose CSSImageValues as URI primitive values in CSSOM to maintain old behavior.
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return DeprecatedCSSOMPrimitiveValue::create(CSSPrimitiveValue::create(m_location.resolvedURL.string(), CSSUnitType::CSS_URI), styleDeclaration);
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}
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bool CSSImageValue::knownToBeOpaque(const RenderElement& renderer) const
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{
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return m_cachedImage.value_or(nullptr) && (**m_cachedImage).currentFrameKnownToBeOpaque(&renderer);
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}
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} // namespace WebCore
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