mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-11 01:22:43 +02:00
70ac025eff
When the HTML parser blocks on a synchronous external script, run a separate tokenizer over the unparsed input and issue speculative fetches for the resources it finds (script src, link rel=stylesheet|preload, img src), with <base href> tracking and template/foreign-content skipping. Also fills in the previously-stubbed "consume a preloaded resource" algorithm and the document's "map of preloaded resources", so that <link rel="preload"> followed by a matching consumer deduplicates to a single fetch.
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
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* Copyright (c) 2026, 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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#pragma once
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#include <AK/String.h>
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#include <LibGC/Ptr.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibURL/URL.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/HTML/Parser/HTMLTokenizer.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/parsing.html#speculative-html-parser
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class SpeculativeHTMLParser final : public JS::Cell {
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GC_CELL(SpeculativeHTMLParser, JS::Cell);
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GC_DECLARE_ALLOCATOR(SpeculativeHTMLParser);
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public:
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static GC::Ref<SpeculativeHTMLParser> create(JS::Realm&, GC::Ref<DOM::Document>, String pending_input, URL::URL base_url);
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virtual ~SpeculativeHTMLParser() override;
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void run();
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void stop();
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private:
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SpeculativeHTMLParser(GC::Ref<DOM::Document>, String pending_input, URL::URL base_url);
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virtual void visit_edges(JS::Cell::Visitor&) override;
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void process_start_tag(HTMLToken const&);
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void process_end_tag(HTMLToken const&);
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GC::Ref<DOM::Document> m_document;
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// m_input must precede m_tokenizer so that m_input.bytes_as_string_view() is valid when the
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// tokenizer's constructor runs in our initializer list.
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String m_input;
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HTMLTokenizer m_tokenizer;
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URL::URL m_base_url;
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u32 m_template_depth { 0 };
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u32 m_foreign_depth { 0 };
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};
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}
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