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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004-2025 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "CSSImageValue.h"
#include "CSSMarkup.h"
#include "CSSPrimitiveValue.h"
#include "CSSURLValue.h"
#include "CSSValueKeywords.h"
#include "CachedImage.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedResourceRequestInitiatorTypes.h"
#include "DeprecatedCSSOMPrimitiveValue.h"
#include "Document.h"
#include "Element.h"
#include "StyleBuilderState.h"
#include "StyleCachedImage.h"
namespace WebCore {
CSSImageValue::CSSImageValue()
: CSSValue(ClassType::Image)
, m_isInvalid(true)
{
}
CSSImageValue::CSSImageValue(CSS::URL&& location, AtomString&& initiatorType)
: CSSValue(ClassType::Image)
, m_location(WTFMove(location))
, m_initiatorType(WTFMove(initiatorType))
{
}
Ref<CSSImageValue> CSSImageValue::create()
{
return adoptRef(*new CSSImageValue);
}
Ref<CSSImageValue> CSSImageValue::create(CSS::URL location, AtomString initiatorType)
{
return adoptRef(*new CSSImageValue(WTFMove(location), WTFMove(initiatorType)));
}
Ref<CSSImageValue> CSSImageValue::create(WTF::URL imageURL, AtomString initiatorType)
{
return create(CSS::URL { .specified = imageURL.string(), .resolved = WTFMove(imageURL), .modifiers = { } }, WTFMove(initiatorType));
}
CSSImageValue::~CSSImageValue() = default;
Ref<CSSImageValue> CSSImageValue::copyForComputedStyle(const CSS::URL& resolvedURL) const
{
if (resolvedURL == m_location)
return const_cast<CSSImageValue&>(*this);
auto result = create(resolvedURL);
result->m_cachedImage = m_cachedImage;
result->m_initiatorType = m_initiatorType;
result->m_unresolvedValue = const_cast<CSSImageValue*>(this);
return result;
}
bool CSSImageValue::isLoadedFromOpaqueSource() const
{
return m_location.modifiers.loadedFromOpaqueSource == LoadedFromOpaqueSource::Yes;
}
bool CSSImageValue::isPending() const
{
return !m_cachedImage;
}
RefPtr<StyleImage> CSSImageValue::createStyleImage(const Style::BuilderState& state) const
{
auto styleLocation = Style::toStyle(m_location, state);
if (styleLocation.resolved == m_location.resolved)
return StyleCachedImage::create(WTFMove(styleLocation), const_cast<CSSImageValue&>(*this));
// FIXME: This case can only happen when a element from a document with no baseURL has an inline style with a relative image URL in it and has been moved to a document with a non-null baseURL. Instead of re-resolving in this case, moved elements with this kind of inline style should have their inline style re-parsed.
auto newLocation = m_location;
newLocation.resolved = styleLocation.resolved;
auto result = create(WTFMove(newLocation));
result->m_cachedImage = m_cachedImage;
result->m_initiatorType = m_initiatorType;
result->m_unresolvedValue = const_cast<CSSImageValue*>(this);
return StyleCachedImage::create(WTFMove(styleLocation), WTFMove(result));
}
CachedImage* CSSImageValue::loadImage(CachedResourceLoader& loader, const ResourceLoaderOptions& options)
{
if (!m_cachedImage) {
ASSERT(loader.document());
ResourceLoaderOptions loadOptions = options;
CSS::applyModifiersToLoaderOptions(m_location.modifiers, loadOptions);
CachedResourceRequest request(ResourceRequest(URL { m_location.resolved }), loadOptions);
if (m_initiatorType.isEmpty())
request.setInitiatorType(cachedResourceRequestInitiatorTypes().css);
else
request.setInitiatorType(m_initiatorType);
if (options.mode == FetchOptions::Mode::Cors)
request.updateForAccessControl(*loader.document());
m_cachedImage = loader.requestImage(WTFMove(request)).value_or(nullptr);
for (auto imageValue = this; (imageValue = imageValue->m_unresolvedValue.get()); )
imageValue->m_cachedImage = m_cachedImage;
}
return m_cachedImage.value().get();
}
bool CSSImageValue::customTraverseSubresources(NOESCAPE const Function<bool(const CachedResource&)>& handler) const
{
return m_cachedImage && *m_cachedImage && handler(**m_cachedImage);
}
bool CSSImageValue::customMayDependOnBaseURL() const
{
return WebCore::CSS::mayDependOnBaseURL(m_location);
}
bool CSSImageValue::equals(const CSSImageValue& other) const
{
return m_location == other.m_location;
}
String CSSImageValue::customCSSText(const CSS::SerializationContext& context) const
{
if (m_isInvalid)
return ""_s;
return CSS::serializationForCSS(context, m_location);
}
Ref<DeprecatedCSSOMValue> CSSImageValue::createDeprecatedCSSOMWrapper(CSSStyleDeclaration& styleDeclaration) const
{
// We expose CSSImageValues as URI primitive values in CSSOM to maintain old behavior.
return DeprecatedCSSOMPrimitiveValue::create(CSSURLValue::create(m_location), styleDeclaration);
}
bool CSSImageValue::knownToBeOpaque(const RenderElement& renderer) const
{
return m_cachedImage.value_or(nullptr) && (**m_cachedImage).currentFrameKnownToBeOpaque(&renderer);
}
} // namespace WebCore
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