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CSSImageValue.cpp
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151 lines (130 loc) · 5.25 KB
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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004-2021 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 "CSSValueKeywords.h"
#include "CachedImage.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedResourceRequestInitiators.h"
#include "DeprecatedCSSOMPrimitiveValue.h"
#include "Document.h"
#include "Element.h"
#include "StyleBuilderState.h"
namespace WebCore {
static bool operator==(const ResolvedURL& a, const ResolvedURL& b)
{
return a.specifiedURLString == b.specifiedURLString && a.resolvedURL == b.resolvedURL;
}
static ResolvedURL makeResolvedURL(URL&& resolvedURL)
{
auto string = resolvedURL.string();
return { WTFMove(string), WTFMove(resolvedURL) };
}
CSSImageValue::CSSImageValue(ResolvedURL&& location, LoadedFromOpaqueSource loadedFromOpaqueSource)
: CSSValue(ImageClass)
, m_location(WTFMove(location))
, m_loadedFromOpaqueSource(loadedFromOpaqueSource)
{
}
CSSImageValue::CSSImageValue(CachedImage& image)
: CSSValue(ImageClass)
, m_location { image.url().string(), image.url() }
, m_cachedImage(&image)
{
}
Ref<CSSImageValue> CSSImageValue::create(ResolvedURL&& location, LoadedFromOpaqueSource loadedFromOpaqueSource)
{
return adoptRef(*new CSSImageValue(WTFMove(location), loadedFromOpaqueSource));
}
Ref<CSSImageValue> CSSImageValue::create(URL&& imageURL, LoadedFromOpaqueSource loadedFromOpaqueSource)
{
return create(makeResolvedURL(WTFMove(imageURL)), loadedFromOpaqueSource);
}
Ref<CSSImageValue> CSSImageValue::create(CachedImage& image)
{
return adoptRef(*new CSSImageValue(image));
}
CSSImageValue::~CSSImageValue() = default;
bool CSSImageValue::isPending() const
{
return !m_cachedImage;
}
URL CSSImageValue::reresolvedURL(const Document& document) const
{
// Re-resolving the URL is important for cases where resolvedURL is still not an absolute URL.
// 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.
return document.completeURL(m_location.resolvedURL.string());
}
Ref<CSSImageValue> CSSImageValue::valueWithStylesResolved(Style::BuilderState& state)
{
auto location = makeResolvedURL(reresolvedURL(state.document()));
if (m_location == location)
return *this;
auto result = create(WTFMove(location), m_loadedFromOpaqueSource);
result->m_cachedImage = m_cachedImage;
result->m_initiatorName = m_initiatorName;
result->m_unresolvedValue = this;
return result;
}
CachedImage* CSSImageValue::loadImage(CachedResourceLoader& loader, const ResourceLoaderOptions& options)
{
if (!m_cachedImage) {
ResourceLoaderOptions loadOptions = options;
loadOptions.loadedFromOpaqueSource = m_loadedFromOpaqueSource;
CachedResourceRequest request(ResourceRequest(reresolvedURL(*loader.document())), loadOptions);
if (m_initiatorName.isEmpty())
request.setInitiator(cachedResourceRequestInitiators().css);
else
request.setInitiator(m_initiatorName);
if (options.mode == FetchOptions::Mode::Cors) {
ASSERT(loader.document());
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::traverseSubresources(const WTF::Function<bool (const CachedResource&)>& handler) const
{
return m_cachedImage.value_or(nullptr) && handler(**m_cachedImage);
}
bool CSSImageValue::equals(const CSSImageValue& other) const
{
return m_location == other.m_location;
}
String CSSImageValue::customCSSText() const
{
return serializeURL(m_location.specifiedURLString);
}
Ref<DeprecatedCSSOMValue> CSSImageValue::createDeprecatedCSSOMWrapper(CSSStyleDeclaration& styleDeclaration) const
{
// NOTE: We expose CSSImageValues as URI primitive values in CSSOM to maintain old behavior.
return DeprecatedCSSOMPrimitiveValue::create(CSSPrimitiveValue::create(m_location.resolvedURL.string(), CSSUnitType::CSS_URI), styleDeclaration);
}
bool CSSImageValue::knownToBeOpaque(const RenderElement& renderer) const
{
return m_cachedImage.value_or(nullptr) && (**m_cachedImage).currentFrameKnownToBeOpaque(&renderer);
}
} // namespace WebCore