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https://github.com/LadybirdBrowser/ladybird.git
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eea81738cd
For the slight cost of counting code points when converting between encodings and a teeny bit of memory, this commit adds a fast path for all-happy utf-16 substrings and code point operations. This seems to be a significant chunk of time spent in many regex benchmarks.
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Utf16View.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Utf16String.h>
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#include <LibWeb/Bindings/SVGTextContentElementPrototype.h>
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#include <LibWeb/CSS/Parser/Parser.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/Layout/SVGTextBox.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/SVGGeometryElement.h>
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#include <LibWeb/SVG/SVGTextContentElement.h>
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namespace Web::SVG {
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SVGTextContentElement::SVGTextContentElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: SVGGraphicsElement(document, move(qualified_name))
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{
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}
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void SVGTextContentElement::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(SVGTextContentElement);
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Base::initialize(realm);
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}
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Optional<TextAnchor> SVGTextContentElement::text_anchor() const
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{
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if (!layout_node())
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return {};
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switch (layout_node()->computed_values().text_anchor()) {
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case CSS::TextAnchor::Start:
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return TextAnchor::Start;
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case CSS::TextAnchor::Middle:
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return TextAnchor::Middle;
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case CSS::TextAnchor::End:
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return TextAnchor::End;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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ByteString SVGTextContentElement::text_contents() const
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{
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return child_text_content().to_byte_string().trim_whitespace();
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}
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// https://svgwg.org/svg2-draft/text.html#__svg__SVGTextContentElement__getNumberOfChars
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WebIDL::ExceptionOr<WebIDL::Long> SVGTextContentElement::get_number_of_chars() const
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{
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auto chars = TRY_OR_THROW_OOM(vm(), utf8_to_utf16(text_contents())).data;
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return static_cast<WebIDL::Long>(chars.size());
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}
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GC::Ref<Geometry::DOMPoint> SVGTextContentElement::get_start_position_of_char(WebIDL::UnsignedLong charnum)
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{
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dbgln("(STUBBED) SVGTextContentElement::get_start_position_of_char(charnum={}). Called on: {}", charnum, debug_description());
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return Geometry::DOMPoint::from_point(vm(), Geometry::DOMPointInit {});
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}
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}
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