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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. ``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
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* 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/StyleColor.h>
#include <WebCore/StyleURL.h>
namespace WebCore {
namespace Style {
enum class ForVisitedLink : bool;
// <paint> = none | <color> | <url> [none | <color>]? | context-fill | context-stroke
// NOTE: `context-fill` and `context-stroke` are not implemented.
// https://svgwg.org/svg2-draft/painting.html#SpecifyingPaint
struct SVGPaint {
struct URLNone {
URL url;
CSS::Keyword::None none;
bool operator==(const URLNone&) const = default;
};
struct URLColor {
URL url;
Color color;
bool operator==(const URLColor&) const = default;
};
SVGPaint(CSS::Keyword::None)
: m_type { Type::None }
{
}
SVGPaint(Style::Color&& value)
: m_type { Type::Color }
, m_color { WTFMove(value) }
{
}
SVGPaint(Style::URL&& value)
: m_type { Type::URL }
, m_url { WTFMove(value) }
{
}
SVGPaint(URLNone&& value)
: m_type { Type::URLNone }
, m_url { WTFMove(value.url) }
{
}
SVGPaint(URLColor&& value)
: m_type { Type::URLColor }
, m_url { WTFMove(value.url) }
, m_color { WTFMove(value.color) }
{
}
bool isNone() const { return m_type == Type::None; }
bool isColor() const { return m_type == Type::Color; }
bool isURL() const { return m_type == Type::URL; }
bool isURLNone() const { return m_type == Type::URLNone; }
bool isURLColor() const { return m_type == Type::URLColor; }
bool hasColor() const { return isColor() || isURLColor(); }
bool hasURL() const { return isURL() || isURLNone() || isURLColor(); }
std::optional<Color> tryColor() const { return isColor() ? std::make_optional(m_color) : std::nullopt; }
std::optional<URL> tryURL() const { return isURL() ? std::make_optional(m_url) : std::nullopt; }
std::optional<URLNone> tryURLNone() const { return isURLNone() ? std::make_optional(URLNone { m_url, CSS::Keyword::None { } }) : std::nullopt; }
std::optional<URLColor> tryURLColor() const { return isURLColor() ? std::make_optional(URLColor { m_url, m_color }) : std::nullopt; }
std::optional<Color> tryAnyColor() const { return hasColor() ? std::make_optional(m_color) : std::nullopt; }
std::optional<URL> tryAnyURL() const { return hasURL() ? std::make_optional(m_url) : std::nullopt; }
const Color& colorDisregardingType() const { return m_color; }
const URL& urlDisregardingType() const { return m_url; }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
switch (m_type) {
case Type::None:
return visitor(CSS::Keyword::None { });
case Type::Color:
return visitor(m_color);
case Type::URL:
return visitor(m_url);
case Type::URLNone:
return visitor(URLNone { m_url, CSS::Keyword::None { } });
case Type::URLColor:
return visitor(URLColor { m_url, m_color });
}
RELEASE_ASSERT_NOT_REACHED();
}
bool operator==(const SVGPaint&) const = default;
bool hasSameType(const SVGPaint& other) const { return m_type == other.m_type; }
private:
enum class Type : uint8_t {
None,
Color,
URL,
URLNone,
URLColor
};
Type m_type;
URL m_url { .resolved = { }, .modifiers = { } };
Color m_color { WebCore::Color { } };
};
template<size_t I> const auto& get(const SVGPaint::URLNone& value)
{
if constexpr (!I)
return value.url;
else if constexpr (I == 1)
return value.none;
}
template<size_t I> const auto& get(const SVGPaint::URLColor& value)
{
if constexpr (!I)
return value.url;
else if constexpr (I == 1)
return value.color;
}
bool containsCurrentColor(const Style::SVGPaint&);
// MARK: - Conversion
template<> struct CSSValueConversion<SVGPaint> { auto operator()(BuilderState&, const CSSValue&, ForVisitedLink) -> SVGPaint; };
// MARK: - Blending
template<> struct Blending<SVGPaint> {
auto equals(const SVGPaint&, const SVGPaint&, const RenderStyle&, const RenderStyle&) -> bool;
auto canBlend(const SVGPaint&, const SVGPaint&) -> bool;
auto blend(const SVGPaint&, const SVGPaint&, const RenderStyle&, const RenderStyle&, const BlendingContext&) -> SVGPaint;
};
} // namespace Style
} // namespace WebCore
DEFINE_SPACE_SEPARATED_TUPLE_LIKE_CONFORMANCE(WebCore::Style::SVGPaint::URLNone, 2)
DEFINE_SPACE_SEPARATED_TUPLE_LIKE_CONFORMANCE(WebCore::Style::SVGPaint::URLColor, 2)
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::SVGPaint)
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