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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.
*/
#pragma once
#include <WebCore/RenderStyleConstants.h>
#include <WebCore/StyleCounterStyle.h>
#include <WebCore/StyleImageWrapper.h>
#include <WebCore/StyleValueTypes.h>
namespace WebCore {
namespace Style {
// <leader()> = leader( <leader-type> )
// <target> = <target-counter()> | <target-counters()> | <target-text()>
// <counter> = <counter()> | <counters()>
// <quote> = open-quote | close-quote | no-open-quote | no-close-quote
// <content-replacement> = <image>
// <content-list> = [ <string> | contents | <image> | <counter> | <quote> | <target> | <leader()> ]+
// <alt-content> = [ <string> | <counter> ]+
// <'content'> = normal | none | [ <content-replacement> | <content-list> ] [/ <alt-content> ]?
// https://www.w3.org/TR/css-content-3/#propdef-content
// MISSING from <content-list>:
// contents
// <leader()>
// <target>
// MISSING from <alt-content>:
// <counter>
struct Content {
struct Text {
String text;
bool operator==(const Text&) const = default;
};
struct Image {
ImageWrapper image;
bool operator==(const Image&) const = default;
};
struct Counter {
AtomString identifier;
AtomString separator;
CounterStyle style;
template<typename... F> decltype(auto) switchOn(F&&...) const;
bool operator==(const Counter&) const = default;
};
struct Quote {
QuoteType quote;
bool operator==(const Quote&) const = default;
};
using ListItem = Variant<Text, Image, Counter, Quote>;
using List = SpaceSeparatedFixedVector<ListItem>;
// FIXME: This struct could be optimized down to a pointer when unused by using TrailingArray.
struct Data {
List list;
Markable<String> altText;
bool operator==(const Data&) const = default;
};
Content(CSS::Keyword::None keyword)
: m_value { keyword }
{
}
Content(CSS::Keyword::Normal keyword)
: m_value { keyword }
{
}
Content(Data&& data)
: m_value { WTFMove(data) }
{
}
bool isNone() const { return WTF::holdsAlternative<CSS::Keyword::None>(m_value); }
bool isNormal() const { return WTF::holdsAlternative<CSS::Keyword::Normal>(m_value); }
bool isData() const { return WTF::holdsAlternative<Data>(m_value); }
const Data* tryData() const LIFETIME_BOUND
{
return std::get_if<Data>(&m_value);
}
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
return WTF::switchOn(m_value, std::forward<F>(f)...);
}
bool operator==(const Content&) const = default;
private:
// FIXME: If Data is converted to be pointer sized when unused using TrailingArray (see above), this can be converted to use a CompactVariant.
Variant<CSS::Keyword::None, CSS::Keyword::Normal, Data> m_value;
};
template<size_t I> const auto& get(const Content::Data& value)
{
if constexpr (!I)
return value.list;
else if constexpr (I == 1)
return value.altText;
}
DEFINE_TYPE_WRAPPER_GET(Content::Text, text);
DEFINE_TYPE_WRAPPER_GET(Content::Image, image);
DEFINE_TYPE_WRAPPER_GET(Content::Quote, quote);
template<typename... F> decltype(auto) Content::Counter::switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
using CounterFunction = FunctionNotation<CSSValueCounter, CommaSeparatedTuple<CustomIdentifier, std::optional<CounterStyle>>>;
using CountersFunction = FunctionNotation<CSSValueCounters, CommaSeparatedTuple<CustomIdentifier, AtomString, std::optional<CounterStyle>>>;
if (separator.isEmpty()) {
return visitor(CounterFunction {
.parameters = { CustomIdentifier { identifier }, style != nameString(CSSValueDecimal) ? std::make_optional(style) : std::nullopt }
});
} else {
return visitor(CountersFunction {
.parameters = { CustomIdentifier { identifier }, separator, style != nameString(CSSValueDecimal) ? std::make_optional(style) : std::nullopt }
});
}
}
// MARK: - Conversion
template<> struct CSSValueConversion<Content> { auto operator()(BuilderState&, const CSSValue&) -> Content; };
// `Content::Counter` is special-cased to return a `CSSCounterValue`.
template<> struct CSSValueCreation<Content::Counter> { Ref<CSSValue> operator()(CSSValuePool&, const RenderStyle&, const Content::Counter&); };
} // namespace Style
} // namespace WebCore
DEFINE_SLASH_SEPARATED_TUPLE_LIKE_CONFORMANCE(WebCore::Style::Content::Data, 2)
DEFINE_TUPLE_LIKE_CONFORMANCE_FOR_TYPE_WRAPPER(WebCore::Style::Content::Text)
DEFINE_TUPLE_LIKE_CONFORMANCE_FOR_TYPE_WRAPPER(WebCore::Style::Content::Image)
DEFINE_TUPLE_LIKE_CONFORMANCE_FOR_TYPE_WRAPPER(WebCore::Style::Content::Quote)
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::Content::Counter)
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::Content)
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