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LibWeb: Load X(HT)ML documents and transform them into HTML DOM

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Ali Mohammad Pur 2022-03-28 16:25:17 +04:30 • committed by Andreas Kling
parent c1649e3372
commit 5a0123fd2f
9 changed files with 347 additions and 29 deletions
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26
Userland/Libraries/LibWeb/HTML/DOMParser.cpp
View file

@ -7,6 +7,7 @@
#include <LibWeb/Bindings/DOMParserWrapper.h>
#include <LibWeb/HTML/DOMParser.h>
#include <LibWeb/HTML/Parser/HTMLParser.h>
#include <LibWeb/XML/XMLDocumentBuilder.h>
namespace Web::HTML {
@ -36,16 +37,23 @@ NonnullRefPtr<DOM::Document> DOMParser::parse_from_string(String const& string,
parser->run("about:blank");
} else {
// -> Otherwise
// FIXME: 1. Create an XML parser parse, associated with document, and with XML scripting support disabled.
// 2. Parse string using parser.
// 3. If the previous step resulted in an XML well-formedness or XML namespace well-formedness error, then:
// 1. Assert: document has no child nodes.
// 2. Let root be the result of creating an element given document, "parsererror", and "http://www.mozilla.org/newlayout/xml/parsererror.xml".
// 3. Optionally, add attributes or children to root to describe the nature of the parsing error.
// 4. Append root to document.
dbgln("DOMParser::parse_from_string: Unimplemented parser for type: {}", Bindings::idl_enum_to_string(type));
TODO();
// 1. Create an XML parser parse, associated with document, and with XML scripting support disabled.
XML::Parser parser(string, { .resolve_external_resource = resolve_xml_resource });
XMLDocumentBuilder builder { document, XMLScriptingSupport::Disabled };
// 2. Parse string using parser.
auto result = parser.parse_with_listener(builder);
// 3. If the previous step resulted in an XML well-formedness or XML namespace well-formedness error, then:
if (result.is_error() || builder.has_error()) {
// NOTE: The XML parsing can produce nodes before it hits an error, just remove them.
// 1. Assert: document has no child nodes.
document->remove_all_children(true);
// 2. Let root be the result of creating an element given document, "parsererror", and "http://www.mozilla.org/newlayout/xml/parsererror.xml".
auto root = DOM::create_element(document, "parsererror", "http://www.mozilla.org/newlayout/xml/parsererror.xml");
// FIXME: 3. Optionally, add attributes or children to root to describe the nature of the parsing error.
// 4. Append root to document.
document->append_child(root);
}
}
// 3. Return document.

10
Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
View file

@ -26,11 +26,6 @@ HTMLScriptElement::HTMLScriptElement(DOM::Document& document, DOM::QualifiedName
HTMLScriptElement::~HTMLScriptElement() = default;
void HTMLScriptElement::set_parser_document(Badge<HTMLParser>, DOM::Document& document)
{
m_parser_document = document;
}
void HTMLScriptElement::begin_delaying_document_load_event(DOM::Document& document)
{
// https://html.spec.whatwg.org/multipage/scripting.html#concept-script-script
@ -38,11 +33,6 @@ void HTMLScriptElement::begin_delaying_document_load_event(DOM::Document& docume
m_document_load_event_delayer.emplace(document);
}
void HTMLScriptElement::set_non_blocking(Badge<HTMLParser>, bool non_blocking)
{
m_non_blocking = non_blocking;
}
// https://html.spec.whatwg.org/multipage/scripting.html#execute-the-script-block
void HTMLScriptElement::execute_script()
{

16
Userland/Libraries/LibWeb/HTML/HTMLScriptElement.h
View file

@ -24,10 +24,18 @@ public:
bool is_ready_to_be_parser_executed() const { return m_ready_to_be_parser_executed; }
bool failed_to_load() const { return m_failed_to_load; }
void set_parser_document(Badge<HTMLParser>, DOM::Document&);
void set_non_blocking(Badge<HTMLParser>, bool);
void set_already_started(Badge<HTMLParser>, bool b) { m_already_started = b; }
void prepare_script(Badge<HTMLParser>) { prepare_script(); }
template<OneOf<XMLDocumentBuilder, HTMLParser> T>
void set_parser_document(Badge<T>, DOM::Document& document) { m_parser_document = document; }
template<OneOf<XMLDocumentBuilder, HTMLParser> T>
void set_non_blocking(Badge<T>, bool b) { m_non_blocking = b; }
template<OneOf<XMLDocumentBuilder, HTMLParser> T>
void set_already_started(Badge<T>, bool b) { m_already_started = b; }
template<OneOf<XMLDocumentBuilder, HTMLParser> T>
void prepare_script(Badge<T>) { prepare_script(); }
void execute_script();
bool is_parser_inserted() const { return !!m_parser_document; }

10
Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
View file

@ -791,12 +791,12 @@ void HTMLParser::handle_in_head(HTMLToken& token)
auto adjusted_insertion_location = find_appropriate_place_for_inserting_node();
auto element = create_element_for(token, Namespace::HTML, *adjusted_insertion_location.parent);
auto& script_element = verify_cast<HTMLScriptElement>(*element);
script_element.set_parser_document({}, document());
script_element.set_non_blocking({}, false);
script_element.set_parser_document(Badge<HTMLParser> {}, document());
script_element.set_non_blocking(Badge<HTMLParser> {}, false);
script_element.set_source_line_number({}, token.start_position().line + 1); // FIXME: This +1 is incorrect for script tags whose script does not start on a new line
if (m_parsing_fragment) {
script_element.set_already_started({}, true);
script_element.set_already_started(Badge<HTMLParser> {}, true);
}
if (m_invoked_via_document_write) {
@ -2223,7 +2223,7 @@ void HTMLParser::handle_text(HTMLToken& token)
if (token.is_end_of_file()) {
log_parse_error();
if (current_node().local_name() == HTML::TagNames::script)
verify_cast<HTMLScriptElement>(current_node()).set_already_started({}, true);
verify_cast<HTMLScriptElement>(current_node()).set_already_started(Badge<HTMLParser> {}, true);
(void)m_stack_of_open_elements.pop();
m_insertion_mode = m_original_insertion_mode;
process_using_the_rules_for(m_insertion_mode, token);
@ -2243,7 +2243,7 @@ void HTMLParser::handle_text(HTMLToken& token)
m_tokenizer.update_insertion_point();
increment_script_nesting_level();
// FIXME: Check if active speculative HTML parser is null.
script->prepare_script({});
script->prepare_script(Badge<HTMLParser> {});
decrement_script_nesting_level();
if (script_nesting_level() == 0)
m_parser_pause_flag = false;