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- /*
- * Copyright (c) 2023, MacDue <macdue@dueutil.tech>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <AK/IterationDecision.h>
- #include <LibGfx/PaintStyle.h>
- #include <LibWeb/SVG/AttributeParser.h>
- #include <LibWeb/SVG/SVGElement.h>
- #include <LibWeb/SVG/SVGStopElement.h>
- namespace Web::SVG {
- struct SVGPaintContext {
- Gfx::FloatRect viewport;
- Gfx::FloatRect path_bounding_box;
- Gfx::AffineTransform transform;
- };
- inline Gfx::SVGGradientPaintStyle::SpreadMethod to_gfx_spread_method(SpreadMethod spread_method)
- {
- switch (spread_method) {
- case SpreadMethod::Pad:
- return Gfx::SVGGradientPaintStyle::SpreadMethod::Pad;
- case SpreadMethod::Reflect:
- return Gfx::SVGGradientPaintStyle::SpreadMethod::Reflect;
- case SpreadMethod::Repeat:
- return Gfx::SVGGradientPaintStyle::SpreadMethod::Repeat;
- default:
- VERIFY_NOT_REACHED();
- }
- }
- class SVGGradientElement : public SVGElement {
- WEB_PLATFORM_OBJECT(SVGGradientElement, SVGElement);
- public:
- virtual ~SVGGradientElement() override = default;
- virtual void attribute_changed(FlyString const& name, Optional<String> const& value) override;
- virtual Optional<Gfx::PaintStyle const&> to_gfx_paint_style(SVGPaintContext const&) const = 0;
- GradientUnits gradient_units() const;
- SpreadMethod spread_method() const;
- Optional<Gfx::AffineTransform> gradient_transform() const;
- protected:
- SVGGradientElement(DOM::Document&, DOM::QualifiedName);
- virtual void initialize(JS::Realm&) override;
- JS::GCPtr<SVGGradientElement const> linked_gradient(HashTable<SVGGradientElement const*>& seen_gradients) const;
- Gfx::AffineTransform gradient_paint_transform(SVGPaintContext const&) const;
- template<VoidFunction<SVGStopElement> Callback>
- void for_each_color_stop(Callback const& callback) const
- {
- HashTable<SVGGradientElement const*> seen_gradients;
- return for_each_color_stop_impl(callback, seen_gradients);
- }
- void add_color_stops(Gfx::SVGGradientPaintStyle&) const;
- private:
- template<VoidFunction<SVGStopElement> Callback>
- void for_each_color_stop_impl(Callback const& callback, HashTable<SVGGradientElement const*>& seen_gradients) const
- {
- bool color_stops_found = false;
- for_each_child_of_type<SVG::SVGStopElement>([&](auto& stop) {
- color_stops_found = true;
- callback(stop);
- });
- if (!color_stops_found) {
- if (auto gradient = linked_gradient(seen_gradients))
- gradient->for_each_color_stop_impl(callback, seen_gradients);
- }
- }
- GradientUnits gradient_units_impl(HashTable<SVGGradientElement const*>& seen_gradients) const;
- SpreadMethod spread_method_impl(HashTable<SVGGradientElement const*>& seen_gradients) const;
- Optional<Gfx::AffineTransform> gradient_transform_impl(HashTable<SVGGradientElement const*>& seen_gradients) const;
- Optional<GradientUnits> m_gradient_units = {};
- Optional<SpreadMethod> m_spread_method = {};
- Optional<Gfx::AffineTransform> m_gradient_transform = {};
- };
- }
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