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59 lines
2 KiB
C++
59 lines
2 KiB
C++
/*
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2022, Andreas Kling <kling@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/HTML/Path2D.h>
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#include <LibWeb/SVG/AttributeParser.h>
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#include <LibWeb/SVG/SVGPathElement.h>
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namespace Web::HTML {
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JS::NonnullGCPtr<Path2D> Path2D::construct_impl(JS::Realm& realm, Optional<Variant<JS::Handle<Path2D>, String>> const& path)
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{
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return *realm.heap().allocate<Path2D>(realm, realm, path);
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}
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// https://html.spec.whatwg.org/multipage/canvas.html#dom-path2d
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Path2D::Path2D(JS::Realm& realm, Optional<Variant<JS::Handle<Path2D>, String>> const& path)
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: PlatformObject(realm)
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, CanvasPath(static_cast<Bindings::PlatformObject&>(*this))
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{
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set_prototype(&Bindings::cached_web_prototype(realm, "Path2D"));
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// 1. Let output be a new Path2D object.
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// 2. If path is not given, then return output.
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if (!path.has_value())
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return;
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// 3. If path is a Path2D object, then add all subpaths of path to output and return output.
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// (In other words, it returns a copy of the argument.)
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if (path->has<JS::Handle<Path2D>>()) {
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this->path() = path->get<JS::Handle<Path2D>>()->path();
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return;
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}
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// 4. Let svgPath be the result of parsing and interpreting path according to SVG 2's rules for path data. [SVG]
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auto path_instructions = SVG::AttributeParser::parse_path_data(path->get<String>());
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auto svg_path = SVG::path_from_path_instructions(path_instructions);
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if (!svg_path.segments().is_empty()) {
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// 5. Let (x, y) be the last point in svgPath.
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auto xy = svg_path.segments().last().point();
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// 6. Add all the subpaths, if any, from svgPath to output.
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this->path() = move(svg_path);
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// 7. Create a new subpath in output with (x, y) as the only point in the subpath.
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this->move_to(xy.x(), xy.y());
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}
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// 8. Return output.
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}
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Path2D::~Path2D() = default;
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}
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