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LibWeb: Add spec comments to HTML parser's "initial" insertion mode

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Andreas Kling 2024-11-23 16:26:52 +01:00 • committed by Andreas Kling
parent 701ed8470d
commit 7309f2a6f9
Notes: github-actions[bot] 2024-11-23 18:20:34 +00:00
1 changed files with 26 additions and 0 deletions
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26
Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
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@ -519,25 +519,51 @@ DOM::QuirksMode HTMLParser::which_quirks_mode(HTMLToken const& doctype_token) co
return DOM::QuirksMode::No;
}
// https://html.spec.whatwg.org/multipage/parsing.html#the-initial-insertion-mode
void HTMLParser::handle_initial(HTMLToken& token)
{
// -> A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF),
// U+000C FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE
if (token.is_character() && token.is_parser_whitespace()) {
return;
}
// -> A comment token
if (token.is_comment()) {
// Insert a comment as the last child of the Document object.
auto comment = realm().create<DOM::Comment>(document(), token.comment());
MUST(document().append_child(*comment));
return;
}
// -> A DOCTYPE token
if (token.is_doctype()) {
// If the DOCTYPE token's name is not "html", or the token's public identifier is not missing,
// or the token's system identifier is neither missing nor "about:legacy-compat", then there is a parse error.
if (token.doctype_data().name != "html" || !token.doctype_data().missing_public_identifier || (!token.doctype_data().missing_system_identifier && token.doctype_data().system_identifier != "about:legacy-compat")) {
log_parse_error();
}
// Append a DocumentType node to the Document node, with its name set to the name given in the DOCTYPE token,
// or the empty string if the name was missing; its public ID set to the public identifier given in the DOCTYPE token,
// or the empty string if the public identifier was missing; and its system ID set to the system identifier
// given in the DOCTYPE token, or the empty string if the system identifier was missing.
auto doctype = realm().create<DOM::DocumentType>(document());
doctype->set_name(token.doctype_data().name);
doctype->set_public_id(token.doctype_data().public_identifier);
doctype->set_system_id(token.doctype_data().system_identifier);
MUST(document().append_child(*doctype));
// Then, if the document is not an iframe srcdoc document, and the parser cannot change the mode flag is false,
// and the DOCTYPE token matches one of the conditions in the following list, then set the Document to quirks mode:
// [...]
// Otherwise, if the document is not an iframe srcdoc document, and the parser cannot change the mode flag is false,
// and the DOCTYPE token matches one of the conditions in the following list, then set the Document to limited-quirks mode:
// [...]
document().set_quirks_mode(which_quirks_mode(token));
// Then, switch the insertion mode to "before html".
m_insertion_mode = InsertionMode::BeforeHTML;
return;
}