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LibWeb: Add initial support for SVG <textPath>
This patch adds basic support for the SVG `<textPath>`, so it supports placing text along a path, but none of the extra attributes for controlling the layout of the text. This is enough to correctly display the MDN example.
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41
Userland/Libraries/LibWeb/SVG/SVGTextPathElement.cpp
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Userland/Libraries/LibWeb/SVG/SVGTextPathElement.cpp
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/*
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/URL.h>
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#include <LibWeb/Layout/SVGTextPathBox.h>
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#include <LibWeb/SVG/AttributeNames.h>
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#include <LibWeb/SVG/SVGTextPathElement.h>
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namespace Web::SVG {
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JS_DEFINE_ALLOCATOR(SVGTextPathElement);
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SVGTextPathElement::SVGTextPathElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: SVGTextContentElement(document, move(qualified_name))
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{
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}
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JS::GCPtr<SVGGeometryElement const> SVGTextPathElement::path_or_shape() const
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{
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auto href = get_attribute(AttributeNames::href);
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if (!href.has_value())
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return {};
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auto url = document().url().complete_url(*href);
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return try_resolve_url_to<SVGGeometryElement const>(url);
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}
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void SVGTextPathElement::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::SVGTextPathElementPrototype>(realm, "SVGTextPathElement"_fly_string));
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}
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JS::GCPtr<Layout::Node> SVGTextPathElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)
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{
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return heap().allocate_without_realm<Layout::SVGTextPathBox>(document(), *this, move(style));
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}
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};
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30
Userland/Libraries/LibWeb/SVG/SVGTextPathElement.h
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Userland/Libraries/LibWeb/SVG/SVGTextPathElement.h
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/*
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/SVG/SVGGeometryElement.h>
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#include <LibWeb/SVG/SVGTextContentElement.h>
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namespace Web::SVG {
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// https://svgwg.org/svg2-draft/text.html#TextPathElement
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class SVGTextPathElement : public SVGTextContentElement {
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WEB_PLATFORM_OBJECT(SVGTextPathElement, SVGTextContentElement);
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JS_DECLARE_ALLOCATOR(SVGTextPathElement);
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public:
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virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
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JS::GCPtr<SVGGeometryElement const> path_or_shape() const;
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protected:
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SVGTextPathElement(DOM::Document&, DOM::QualifiedName);
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virtual void initialize(JS::Realm&) override;
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};
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}
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Userland/Libraries/LibWeb/SVG/SVGTextPathElement.idl
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Userland/Libraries/LibWeb/SVG/SVGTextPathElement.idl
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#import <SVG/SVGTextContentElement.idl>
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#import <SVG/SVGURIReference.idl>
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// https://svgwg.org/svg2-draft/text.html#InterfaceSVGTextPathElement
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[Exposed=Window]
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interface SVGTextPathElement : SVGTextContentElement {
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// textPath Method Types
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const unsigned short TEXTPATH_METHODTYPE_UNKNOWN = 0;
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const unsigned short TEXTPATH_METHODTYPE_ALIGN = 1;
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const unsigned short TEXTPATH_METHODTYPE_STRETCH = 2;
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// textPath Spacing Types
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const unsigned short TEXTPATH_SPACINGTYPE_UNKNOWN = 0;
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const unsigned short TEXTPATH_SPACINGTYPE_AUTO = 1;
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const unsigned short TEXTPATH_SPACINGTYPE_EXACT = 2;
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// FIXME: [SameObject] readonly attribute SVGAnimatedLength startOffset;
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// FIXME: [SameObject] readonly attribute SVGAnimatedEnumeration method;
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// FIXME: [SameObject] readonly attribute SVGAnimatedEnumeration spacing;
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};
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SVGTextPathElement includes SVGURIReference;
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Userland/Libraries/LibWeb/SVG/SVGURIReference.idl
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Userland/Libraries/LibWeb/SVG/SVGURIReference.idl
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interface mixin SVGURIReference {
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// FIXME: [SameObject] readonly attribute SVGAnimatedString href;
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};
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@ -22,6 +22,7 @@ namespace Web::SVG::TagNames {
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__ENUMERATE_SVG_TAG(rect) \
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__ENUMERATE_SVG_TAG(svg) \
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__ENUMERATE_SVG_TAG(text) \
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__ENUMERATE_SVG_TAG(textPath) \
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__ENUMERATE_SVG_TAG(tspan)
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#define ENUMERATE_SVG_TAGS \
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