mirror of
https://github.com/RGBCube/serenity
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112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
/*
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/SVG/AttributeNames.h>
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#include <LibWeb/SVG/AttributeParser.h>
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#include <LibWeb/SVG/SVGCircleElement.h>
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namespace Web::SVG {
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JS_DEFINE_ALLOCATOR(SVGCircleElement);
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SVGCircleElement::SVGCircleElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: SVGGeometryElement(document, qualified_name)
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{
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}
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void SVGCircleElement::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::SVGCircleElementPrototype>(realm, "SVGCircleElement"_fly_string));
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}
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void SVGCircleElement::attribute_changed(FlyString const& name, Optional<String> const& value)
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{
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SVGGeometryElement::attribute_changed(name, value);
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if (name == SVG::AttributeNames::cx) {
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m_center_x = AttributeParser::parse_coordinate(value.value_or(String {}));
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m_path.clear();
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} else if (name == SVG::AttributeNames::cy) {
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m_center_y = AttributeParser::parse_coordinate(value.value_or(String {}));
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m_path.clear();
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} else if (name == SVG::AttributeNames::r) {
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m_radius = AttributeParser::parse_positive_length(value.value_or(String {}));
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m_path.clear();
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}
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}
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Gfx::Path& SVGCircleElement::get_path()
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{
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if (m_path.has_value())
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return m_path.value();
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float cx = m_center_x.value_or(0);
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float cy = m_center_y.value_or(0);
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float r = m_radius.value_or(0);
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Gfx::Path path;
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// A zero radius disables rendering.
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if (r == 0) {
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m_path = move(path);
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return m_path.value();
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}
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bool large_arc = false;
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bool sweep = true;
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// 1. A move-to command to the point cx+r,cy;
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path.move_to({ cx + r, cy });
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// 2. arc to cx,cy+r;
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path.arc_to({ cx, cy + r }, r, large_arc, sweep);
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// 3. arc to cx-r,cy;
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path.arc_to({ cx - r, cy }, r, large_arc, sweep);
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// 4. arc to cx,cy-r;
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path.arc_to({ cx, cy - r }, r, large_arc, sweep);
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// 5. arc with a segment-completing close path operation.
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path.arc_to({ cx + r, cy }, r, large_arc, sweep);
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m_path = move(path);
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return m_path.value();
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}
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// https://www.w3.org/TR/SVG11/shapes.html#CircleElementCXAttribute
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JS::NonnullGCPtr<SVGAnimatedLength> SVGCircleElement::cx() const
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{
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// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
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// FIXME: Create a proper animated value when animations are supported.
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auto base_length = SVGLength::create(realm(), 0, m_center_x.value_or(0));
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auto anim_length = SVGLength::create(realm(), 0, m_center_x.value_or(0));
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return SVGAnimatedLength::create(realm(), move(base_length), move(anim_length));
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}
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// https://www.w3.org/TR/SVG11/shapes.html#CircleElementCYAttribute
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JS::NonnullGCPtr<SVGAnimatedLength> SVGCircleElement::cy() const
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{
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// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
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// FIXME: Create a proper animated value when animations are supported.
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auto base_length = SVGLength::create(realm(), 0, m_center_y.value_or(0));
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auto anim_length = SVGLength::create(realm(), 0, m_center_y.value_or(0));
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return SVGAnimatedLength::create(realm(), move(base_length), move(anim_length));
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}
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// https://www.w3.org/TR/SVG11/shapes.html#CircleElementRAttribute
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JS::NonnullGCPtr<SVGAnimatedLength> SVGCircleElement::r() const
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{
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// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
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// FIXME: Create a proper animated value when animations are supported.
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auto base_length = SVGLength::create(realm(), 0, m_radius.value_or(0));
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auto anim_length = SVGLength::create(realm(), 0, m_radius.value_or(0));
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return SVGAnimatedLength::create(realm(), move(base_length), move(anim_length));
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}
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}
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