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LibWeb: Implement fragment parsing and use it for Element.innerHTML

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This patch implements most of the HTML fragment parsing algorithm and
ports Element::set_inner_html() to it. This was the last remaining user
of the old HTML parser. :^)
This commit is contained in:
Andreas Kling 2020-06-25 23:42:08 +02:00
parent eb33021d65
commit 92d831c25b
7 changed files with 91 additions and 18 deletions
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69
Libraries/LibWeb/Parser/HTMLDocumentParser.cpp
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@ -56,6 +56,7 @@ RefPtr<Document> parse_html_document(const StringView& data, const URL& url, con
HTMLDocumentParser::HTMLDocumentParser(const StringView& input, const String& encoding)
: m_tokenizer(input, encoding)
{
m_document = adopt(*new Document);
}
HTMLDocumentParser::~HTMLDocumentParser()
@ -64,7 +65,6 @@ HTMLDocumentParser::~HTMLDocumentParser()
void HTMLDocumentParser::run(const URL& url)
{
m_document = adopt(*new Document);
m_document->set_url(url);
m_document->set_source(m_tokenizer.source());
@ -2518,10 +2518,17 @@ void HTMLDocumentParser::handle_after_after_frameset(HTMLToken& token)
PARSE_ERROR();
}
void HTMLDocumentParser::reset_the_insertion_mode_appropriately()
void HTMLDocumentParser::reset_the_insertion_mode_appropriately(const Element* context_element)
{
for (ssize_t i = m_stack_of_open_elements.elements().size() - 1; i >= 0; --i) {
RefPtr<Element> node = m_stack_of_open_elements.elements().at(i);
// NOTE: When parsing fragments, we substitute the context element for the root of the stack of open elements.
RefPtr<Element> node;
if (i == 0 && context_element) {
node = context_element;
} else {
node = m_stack_of_open_elements.elements().at(i);
}
if (node->tag_name() == HTML::TagNames::select) {
TODO();
@ -2580,9 +2587,6 @@ void HTMLDocumentParser::reset_the_insertion_mode_appropriately()
}
m_insertion_mode = InsertionMode::InBody;
if (m_parsing_fragment) {
TODO();
}
}
const char* HTMLDocumentParser::insertion_mode_name() const
@ -2601,4 +2605,57 @@ Document& HTMLDocumentParser::document()
{
return *m_document;
}
NonnullRefPtrVector<Node> HTMLDocumentParser::parse_html_fragment(Element& context_element, const StringView& markup)
{
HTMLDocumentParser parser(markup, "utf-8");
parser.m_parsing_fragment = true;
parser.document().set_quirks_mode(context_element.document().in_quirks_mode());
if (context_element.tag_name().is_one_of(HTML::TagNames::title, HTML::TagNames::textarea)) {
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::RCDATA);
} else if (context_element.tag_name().is_one_of(HTML::TagNames::style, HTML::TagNames::xmp, HTML::TagNames::iframe, HTML::TagNames::noembed, HTML::TagNames::noframes)) {
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::RAWTEXT);
} else if (context_element.tag_name().is_one_of(HTML::TagNames::script)) {
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::ScriptData);
} else if (context_element.tag_name().is_one_of(HTML::TagNames::noscript)) {
if (context_element.document().is_scripting_enabled())
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::RAWTEXT);
} else if (context_element.tag_name().is_one_of(HTML::TagNames::noscript)) {
if (context_element.document().is_scripting_enabled())
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::RAWTEXT);
} else if (context_element.tag_name().is_one_of(HTML::TagNames::plaintext)) {
parser.m_tokenizer.switch_to({}, HTMLTokenizer::State::PLAINTEXT);
}
auto root = create_element(context_element.document(), HTML::TagNames::html);
parser.document().append_child(root);
parser.m_stack_of_open_elements.push(root);
if (context_element.tag_name() == HTML::TagNames::template_) {
TODO();
}
// FIXME: Create a start tag token whose name is the local name of context and whose attributes are the attributes of context.
parser.reset_the_insertion_mode_appropriately(&context_element);
for (auto* form_candidate = &context_element; form_candidate; form_candidate = form_candidate->parent_element()) {
if (is<HTMLFormElement>(*form_candidate)) {
parser.m_form_element = to<HTMLFormElement>(*form_candidate);
break;
}
}
parser.run(context_element.document().url());
NonnullRefPtrVector<Node> children;
while (RefPtr<Node> child = root->first_child()) {
root->remove_child(*child);
context_element.document().adopt_node(*child);
children.append(*child);
}
return children;
}
}