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834202aeb9
This needs to happen before prototype/constructor intitialization can be made lazy. Otherwise, GC could run during the C++ constructor and try to collect the object currently being created.
90 lines
4.3 KiB
C++
90 lines
4.3 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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* Copyright (c) 2021-2022, 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/CSS/Parser/Parser.h>
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#include <LibWeb/Layout/Node.h>
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#include <LibWeb/SVG/SVGGraphicsElement.h>
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#include <LibWeb/SVG/SVGSVGElement.h>
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namespace Web::SVG {
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SVGGraphicsElement::SVGGraphicsElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: SVGElement(document, move(qualified_name))
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{
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}
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void SVGGraphicsElement::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::SVGGraphicsElementPrototype>(realm, "SVGGraphicsElement"));
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}
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void SVGGraphicsElement::apply_presentational_hints(CSS::StyleProperties& style) const
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{
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CSS::Parser::ParsingContext parsing_context { document() };
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for_each_attribute([&](auto& name, auto& value) {
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if (name.equals_ignoring_case("fill"sv)) {
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// FIXME: The `fill` attribute and CSS `fill` property are not the same! But our support is limited enough that they are equivalent for now.
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if (auto fill_value = parse_css_value(parsing_context, value, CSS::PropertyID::Fill))
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style.set_property(CSS::PropertyID::Fill, fill_value.release_nonnull());
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} else if (name.equals_ignoring_case("stroke"sv)) {
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// FIXME: The `stroke` attribute and CSS `stroke` property are not the same! But our support is limited enough that they are equivalent for now.
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if (auto stroke_value = parse_css_value(parsing_context, value, CSS::PropertyID::Stroke))
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style.set_property(CSS::PropertyID::Stroke, stroke_value.release_nonnull());
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} else if (name.equals_ignoring_case("stroke-width"sv)) {
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if (auto stroke_width_value = parse_css_value(parsing_context, value, CSS::PropertyID::StrokeWidth))
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style.set_property(CSS::PropertyID::StrokeWidth, stroke_width_value.release_nonnull());
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} else if (name.equals_ignoring_case("transform"sv)) {
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if (auto transform = parse_css_value(parsing_context, value, CSS::PropertyID::Transform))
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style.set_property(CSS::PropertyID::Transform, transform.release_nonnull());
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}
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});
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}
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Optional<Gfx::Color> SVGGraphicsElement::fill_color() const
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{
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if (!layout_node())
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return {};
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// FIXME: In the working-draft spec, `fill` is intended to be a shorthand, with `fill-color`
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// being what we actually want to use. But that's not final or widely supported yet.
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return layout_node()->computed_values().fill();
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}
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Optional<Gfx::Color> SVGGraphicsElement::stroke_color() const
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{
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if (!layout_node())
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return {};
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// FIXME: In the working-draft spec, `stroke` is intended to be a shorthand, with `stroke-color`
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// being what we actually want to use. But that's not final or widely supported yet.
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return layout_node()->computed_values().stroke();
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}
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Optional<float> SVGGraphicsElement::stroke_width() const
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{
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if (!layout_node())
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return {};
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// FIXME: Converting to pixels isn't really correct - values should be in "user units"
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// https://svgwg.org/svg2-draft/coords.html#TermUserUnits
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if (auto width = layout_node()->computed_values().stroke_width(); width.has_value()) {
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// Resolved relative to the "Scaled viewport size": https://www.w3.org/TR/2017/WD-fill-stroke-3-20170413/#scaled-viewport-size
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// FIXME: This isn't right, but it's something.
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CSSPixels viewport_width = 0;
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CSSPixels viewport_height = 0;
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if (auto* svg_svg_element = first_ancestor_of_type<SVGSVGElement>()) {
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if (auto* svg_svg_layout_node = svg_svg_element->layout_node()) {
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viewport_width = svg_svg_layout_node->computed_values().width().resolved(*svg_svg_layout_node, CSS::Length::make_px(0)).to_px(*svg_svg_layout_node);
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viewport_height = svg_svg_layout_node->computed_values().height().resolved(*svg_svg_layout_node, CSS::Length::make_px(0)).to_px(*svg_svg_layout_node);
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}
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}
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auto scaled_viewport_size = CSS::Length::make_px((viewport_width + viewport_height) * 0.5f);
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return width->resolved(*layout_node(), scaled_viewport_size).to_px(*layout_node()).value();
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}
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return {};
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}
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}
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