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/*
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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 "StyleContent.h"
#include "CSSAttrValue.h"
#include "CSSCounterValue.h"
#include "CSSPrimitiveValue.h"
#include "CSSValueList.h"
#include "RenderStyleInlines.h"
#include "RenderStyleSetters.h"
#include "StyleBuilderChecking.h"
namespace WebCore {
namespace Style {
// MARK: - Conversion
auto CSSValueConversion<Content>::operator()(BuilderState& state, const CSSValue& value) -> Content
{
if (RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value)) {
switch (primitiveValue->valueID()) {
case CSSValueNormal:
return CSS::Keyword::Normal { };
case CSSValueNone:
return CSS::Keyword::None { };
default:
break;
}
state.setCurrentPropertyInvalidAtComputedValueTime();
return CSS::Keyword::Normal { };
}
RefPtr contentListAltTextPair = dynamicDowncast<CSSValuePair>(value);
RefPtr contentList = requiredDowncast<CSSValueList>(state, contentListAltTextPair ? contentListAltTextPair->first() : value);
if (!contentList)
return CSS::Keyword::Normal { };
// FIXME: Replace with support for CSS Values 5 attr() substitution function.
auto processAttrContent = [&](const CSSAttrValue& value) -> AtomString {
if (state.style().pseudoElementType() == PseudoId::None)
state.style().setHasAttrContent();
else
const_cast<RenderStyle&>(state.parentStyle()).setHasAttrContent();
QualifiedName attr(nullAtom(), value.attributeName().impl(), nullAtom());
RefPtr element = state.element();
const AtomString& attributeValue = element ? element->getAttribute(attr) : nullAtom();
// Register the fact that the attribute value affects the style.
state.registerContentAttribute(attr.localName());
if (attributeValue.isNull()) {
RefPtr fallback = dynamicDowncast<CSSPrimitiveValue>(value.fallback());
return fallback && fallback->isString() ? fallback->stringValue().impl() : emptyAtom();
}
return attributeValue.impl();
};
auto computeContentList = [&] -> Content::List {
return Content::List::map(*contentList, [&](const CSSValue& item) -> Content::ListItem {
if (item.isImage()) {
if (RefPtr image = state.createStyleImage(item))
return Content::Image { ImageWrapper { image.releaseNonNull() } };
state.setCurrentPropertyInvalidAtComputedValueTime();
return Content::Text { emptyString() };
}
if (RefPtr primitive = dynamicDowncast<CSSPrimitiveValue>(item)) {
switch (primitive->valueID()) {
case CSSValueOpenQuote:
return Content::Quote { QuoteType::OpenQuote };
case CSSValueCloseQuote:
return Content::Quote { QuoteType::CloseQuote };
case CSSValueNoOpenQuote:
return Content::Quote { QuoteType::NoOpenQuote };
case CSSValueNoCloseQuote:
return Content::Quote { QuoteType::NoCloseQuote };
default:
break;
}
if (primitive->isString())
return Content::Text { primitive->stringValue() };
if (RefPtr attr = primitive->cssAttrValue())
return Content::Text { processAttrContent(*attr) };
state.setCurrentPropertyInvalidAtComputedValueTime();
return Content::Text { emptyString() };
}
if (RefPtr counter = dynamicDowncast<CSSCounterValue>(item))
return Content::Counter { counter->identifier(), counter->separator(), toStyleFromCSSValue<CounterStyle>(state, counter->counterStyle()) };
state.setCurrentPropertyInvalidAtComputedValueTime();
return Content::Text { emptyString() };
});
};
auto computeAltText = [&] -> std::optional<String> {
if (!contentListAltTextPair)
return { };
auto altTextList = requiredListDowncast<CSSValueList, CSSPrimitiveValue>(state, contentListAltTextPair->second());
if (!altTextList)
return { };
StringBuilder altTextBuilder;
for (Ref item : *altTextList) {
if (item->isString())
altTextBuilder.append(item->stringValue());
else if (RefPtr attr = item->cssAttrValue())
altTextBuilder.append(processAttrContent(*attr));
}
return altTextBuilder.toString();
};
return Content::Data { computeContentList(), computeAltText() };
}
Ref<CSSValue> CSSValueCreation<Content::Counter>::operator()(CSSValuePool& pool, const RenderStyle& style, const Content::Counter& value)
{
return CSSCounterValue::create(value.identifier, value.separator, createCSSValue(pool, style, value.style));
}
} // namespace Style
} // namespace WebCore
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