jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
3 * Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
4 *
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8#include <LibWeb/Bindings/Intrinsics.h>
9#include <LibWeb/CSS/Parser/Parser.h>
10#include <LibWeb/Layout/Node.h>
11#include <LibWeb/SVG/SVGGraphicsElement.h>
12#include <LibWeb/SVG/SVGSVGElement.h>
13
14namespace Web::SVG {
15
16SVGGraphicsElement::SVGGraphicsElement(DOM::Document& document, DOM::QualifiedName qualified_name)
17 : SVGElement(document, move(qualified_name))
18{
19}
20
21JS::ThrowCompletionOr<void> SVGGraphicsElement::initialize(JS::Realm& realm)
22{
23 MUST_OR_THROW_OOM(Base::initialize(realm));
24 set_prototype(&Bindings::ensure_web_prototype<Bindings::SVGGraphicsElementPrototype>(realm, "SVGGraphicsElement"));
25
26 return {};
27}
28
29void SVGGraphicsElement::apply_presentational_hints(CSS::StyleProperties& style) const
30{
31 CSS::Parser::ParsingContext parsing_context { document() };
32 for_each_attribute([&](auto& name, auto& value) {
33 if (name.equals_ignoring_ascii_case("fill"sv)) {
34 // FIXME: The `fill` attribute and CSS `fill` property are not the same! But our support is limited enough that they are equivalent for now.
35 if (auto fill_value = parse_css_value(parsing_context, value, CSS::PropertyID::Fill))
36 style.set_property(CSS::PropertyID::Fill, fill_value.release_nonnull());
37 } else if (name.equals_ignoring_ascii_case("stroke"sv)) {
38 // FIXME: The `stroke` attribute and CSS `stroke` property are not the same! But our support is limited enough that they are equivalent for now.
39 if (auto stroke_value = parse_css_value(parsing_context, value, CSS::PropertyID::Stroke))
40 style.set_property(CSS::PropertyID::Stroke, stroke_value.release_nonnull());
41 } else if (name.equals_ignoring_ascii_case("stroke-width"sv)) {
42 if (auto stroke_width_value = parse_css_value(parsing_context, value, CSS::PropertyID::StrokeWidth))
43 style.set_property(CSS::PropertyID::StrokeWidth, stroke_width_value.release_nonnull());
44 } else if (name.equals_ignoring_ascii_case("transform"sv)) {
45 if (auto transform = parse_css_value(parsing_context, value, CSS::PropertyID::Transform))
46 style.set_property(CSS::PropertyID::Transform, transform.release_nonnull());
47 }
48 });
49}
50
51Optional<Gfx::Color> SVGGraphicsElement::fill_color() const
52{
53 if (!layout_node())
54 return {};
55 // FIXME: In the working-draft spec, `fill` is intended to be a shorthand, with `fill-color`
56 // being what we actually want to use. But that's not final or widely supported yet.
57 return layout_node()->computed_values().fill();
58}
59
60Optional<Gfx::Color> SVGGraphicsElement::stroke_color() const
61{
62 if (!layout_node())
63 return {};
64 // FIXME: In the working-draft spec, `stroke` is intended to be a shorthand, with `stroke-color`
65 // being what we actually want to use. But that's not final or widely supported yet.
66 return layout_node()->computed_values().stroke();
67}
68
69Optional<float> SVGGraphicsElement::stroke_width() const
70{
71 if (!layout_node())
72 return {};
73 // FIXME: Converting to pixels isn't really correct - values should be in "user units"
74 // https://svgwg.org/svg2-draft/coords.html#TermUserUnits
75 if (auto width = layout_node()->computed_values().stroke_width(); width.has_value()) {
76 // Resolved relative to the "Scaled viewport size": https://www.w3.org/TR/2017/WD-fill-stroke-3-20170413/#scaled-viewport-size
77 // FIXME: This isn't right, but it's something.
78 CSSPixels viewport_width = 0;
79 CSSPixels viewport_height = 0;
80 if (auto* svg_svg_element = first_ancestor_of_type<SVGSVGElement>()) {
81 if (auto* svg_svg_layout_node = svg_svg_element->layout_node()) {
82 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);
83 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);
84 }
85 }
86 auto scaled_viewport_size = CSS::Length::make_px((viewport_width + viewport_height) * 0.5f);
87 return width->resolved(*layout_node(), scaled_viewport_size).to_px(*layout_node()).value();
88 }
89 return {};
90}
91
92}