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LibWeb: Implement quirks mode detection

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This allows us to determine which mode to render the page in.

Exposes "doctype" and "compatMode" on Document.
Exposes "name", "publicId" and "systemId" on DocumentType.
This commit is contained in:
Luke 2020-07-18 21:17:17 +01:00 • committed by Andreas Kling
parent a5ecb9bd6b
commit 19d6884529
13 changed files with 196 additions and 6 deletions
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120
Libraries/LibWeb/Parser/HTMLDocumentParser.cpp
View file

@ -46,6 +46,64 @@
namespace Web {
static Vector<FlyString> s_quirks_public_ids = {
"+//Silmaril//dtd html Pro v0r11 19970101//",
"-//AS//DTD HTML 3.0 asWedit + extensions//",
"-//AdvaSoft Ltd//DTD HTML 3.0 asWedit + extensions//",
"-//IETF//DTD HTML 2.0 Level 1//",
"-//IETF//DTD HTML 2.0 Level 2//",
"-//IETF//DTD HTML 2.0 Strict Level 1//",
"-//IETF//DTD HTML 2.0 Strict Level 2//",
"-//IETF//DTD HTML 2.0 Strict//",
"-//IETF//DTD HTML 2.0//",
"-//IETF//DTD HTML 2.1E//",
"-//IETF//DTD HTML 3.0//",
"-//IETF//DTD HTML 3.2 Final//",
"-//IETF//DTD HTML 3.2//",
"-//IETF//DTD HTML 3//",
"-//IETF//DTD HTML Level 0//",
"-//IETF//DTD HTML Level 1//",
"-//IETF//DTD HTML Level 2//",
"-//IETF//DTD HTML Level 3//",
"-//IETF//DTD HTML Strict Level 0//",
"-//IETF//DTD HTML Strict Level 1//",
"-//IETF//DTD HTML Strict Level 2//",
"-//IETF//DTD HTML Strict Level 3//",
"-//IETF//DTD HTML Strict//",
"-//IETF//DTD HTML//",
"-//Metrius//DTD Metrius Presentational//",
"-//Microsoft//DTD Internet Explorer 2.0 HTML Strict//",
"-//Microsoft//DTD Internet Explorer 2.0 HTML//",
"-//Microsoft//DTD Internet Explorer 2.0 Tables//",
"-//Microsoft//DTD Internet Explorer 3.0 HTML Strict//",
"-//Microsoft//DTD Internet Explorer 3.0 HTML//",
"-//Microsoft//DTD Internet Explorer 3.0 Tables//",
"-//Netscape Comm. Corp.//DTD HTML//",
"-//Netscape Comm. Corp.//DTD Strict HTML//",
"-//O'Reilly and Associates//DTD HTML 2.0//",
"-//O'Reilly and Associates//DTD HTML Extended 1.0//",
"-//O'Reilly and Associates//DTD HTML Extended Relaxed 1.0//",
"-//SQ//DTD HTML 2.0 HoTMetaL + extensions//",
"-//SoftQuad Software//DTD HoTMetaL PRO 6.0::19990601::extensions to HTML 4.0//",
"-//SoftQuad//DTD HoTMetaL PRO 4.0::19971010::extensions to HTML 4.0//",
"-//Spyglass//DTD HTML 2.0 Extended//",
"-//Sun Microsystems Corp.//DTD HotJava HTML//",
"-//Sun Microsystems Corp.//DTD HotJava Strict HTML//",
"-//W3C//DTD HTML 3 1995-03-24//",
"-//W3C//DTD HTML 3.2 Draft//",
"-//W3C//DTD HTML 3.2 Final//",
"-//W3C//DTD HTML 3.2//",
"-//W3C//DTD HTML 3.2S Draft//",
"-//W3C//DTD HTML 4.0 Frameset//",
"-//W3C//DTD HTML 4.0 Transitional//",
"-//W3C//DTD HTML Experimental 19960712//",
"-//W3C//DTD HTML Experimental 970421//",
"-//W3C//DTD W3 HTML//",
"-//W3O//DTD W3 HTML 3.0//",
"-//WebTechs//DTD Mozilla HTML 2.0//",
"-//WebTechs//DTD Mozilla HTML//"
};
RefPtr<Document> parse_html_document(const StringView& data, const URL& url, const String& encoding)
{
HTMLDocumentParser parser(data, encoding);
@ -181,6 +239,60 @@ void HTMLDocumentParser::process_using_the_rules_for(InsertionMode mode, HTMLTok
}
}
QuirksMode HTMLDocumentParser::which_quirks_mode(const HTMLToken& doctype_token) const
{
if (doctype_token.m_doctype.force_quirks)
return QuirksMode::Yes;
// NOTE: The tokenizer puts the name into lower case for us.
if (doctype_token.m_doctype.name.to_string() != "html")
return QuirksMode::Yes;
auto public_identifier = doctype_token.m_doctype.public_identifier.to_string();
auto system_identifier = doctype_token.m_doctype.system_identifier.to_string();
if (public_identifier.equals_ignoring_case("-//W3O//DTD W3 HTML Strict 3.0//EN//"))
return QuirksMode::Yes;
if (public_identifier.equals_ignoring_case("-/W3C/DTD HTML 4.0 Transitional/EN"))
return QuirksMode::Yes;
if (public_identifier.equals_ignoring_case("HTML"))
return QuirksMode::Yes;
if (system_identifier.equals_ignoring_case("http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"))
return QuirksMode::Yes;
for (auto& public_id : s_quirks_public_ids) {
if (public_identifier.starts_with(public_id, CaseSensitivity::CaseInsensitive))
return QuirksMode::Yes;
}
if (doctype_token.m_doctype.missing_system_identifier) {
if (public_identifier.starts_with("-//W3C//DTD HTML 4.01 Frameset//", CaseSensitivity::CaseInsensitive))
return QuirksMode::Yes;
if (public_identifier.starts_with("-//W3C//DTD HTML 4.01 Transitional//", CaseSensitivity::CaseInsensitive))
return QuirksMode::Yes;
}
if (public_identifier.starts_with("-//W3C//DTD XHTML 1.0 Frameset//", CaseSensitivity::CaseInsensitive))
return QuirksMode::Limited;
if (public_identifier.starts_with("-//W3C//DTD XHTML 1.0 Transitional//", CaseSensitivity::CaseInsensitive))
return QuirksMode::Limited;
if (!doctype_token.m_doctype.missing_system_identifier) {
if (public_identifier.starts_with("-//W3C//DTD HTML 4.01 Frameset//", CaseSensitivity::CaseInsensitive))
return QuirksMode::Limited;
if (public_identifier.starts_with("-//W3C//DTD HTML 4.01 Transitional//", CaseSensitivity::CaseInsensitive))
return QuirksMode::Limited;
}
return QuirksMode::No;
}
void HTMLDocumentParser::handle_initial(HTMLToken& token)
{
if (token.is_character() && token.is_parser_whitespace()) {
@ -196,14 +308,16 @@ void HTMLDocumentParser::handle_initial(HTMLToken& token)
if (token.is_doctype()) {
auto doctype = adopt(*new DocumentType(document()));
doctype->set_name(token.m_doctype.name.to_string());
doctype->set_public_id(token.m_doctype.public_identifier.to_string());
doctype->set_system_id(token.m_doctype.system_identifier.to_string());
document().append_child(move(doctype));
document().set_quirks_mode(token.m_doctype.force_quirks);
document().set_quirks_mode(which_quirks_mode(token));
m_insertion_mode = InsertionMode::BeforeHTML;
return;
}
PARSE_ERROR();
document().set_quirks_mode(true);
document().set_quirks_mode(QuirksMode::Yes);
m_insertion_mode = InsertionMode::BeforeHTML;
process_using_the_rules_for(InsertionMode::BeforeHTML, token);
}
@ -2612,7 +2726,7 @@ NonnullRefPtrVector<Node> HTMLDocumentParser::parse_html_fragment(Element& conte
{
HTMLDocumentParser parser(markup, "utf-8");
parser.m_parsing_fragment = true;
parser.document().set_quirks_mode(context_element.document().in_quirks_mode());
parser.document().set_quirks_mode(context_element.document().mode());
if (context_element.tag_name().is_one_of(HTML::TagNames::title, HTML::TagNames::textarea)) {
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::RCDATA);