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/*
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/DOMParserPrototype.h>
#include <LibWeb/Bindings/MainThreadVM.h>
#include <LibWeb/HTML/DOMParser.h>
#include <LibWeb/HTML/Parser/HTMLParser.h>
#include <LibWeb/HTML/Scripting/Environments.h>
#include <LibWeb/XML/XMLDocumentBuilder.h>
namespace Web::HTML {
WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMParser>> DOMParser::construct_impl(JS::Realm& realm)
{
return realm.heap().allocate<DOMParser>(realm, realm);
}
DOMParser::DOMParser(JS::Realm& realm)
: PlatformObject(realm)
{
}
DOMParser::~DOMParser() = default;
JS::ThrowCompletionOr<void> DOMParser::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::DOMParserPrototype>(realm, "DOMParser"));
return {};
}
// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring
JS::NonnullGCPtr<DOM::Document> DOMParser::parse_from_string(DeprecatedString const& string, Bindings::DOMParserSupportedType type)
{
// 1. Let document be a new Document, whose content type is type and url is this's relevant global object's associated Document's URL.
auto document = DOM::Document::create(realm(), verify_cast<HTML::Window>(relevant_global_object(*this)).associated_document().url());
document->set_content_type(Bindings::idl_enum_to_deprecated_string(type));
// 2. Switch on type:
if (type == Bindings::DOMParserSupportedType::Text_Html) {
// -> "text/html"
// 1. Set document's type to "html".
document->set_document_type(DOM::Document::Type::HTML);
// 2. Create an HTML parser parser, associated with document.
// 3. Place string into the input stream for parser. The encoding confidence is irrelevant.
// FIXME: We don't have the concept of encoding confidence yet.
auto parser = HTMLParser::create(*document, string, "UTF-8");
// 4. Start parser and let it run until it has consumed all the characters just inserted into the input stream.
// FIXME: This is to match the default URL. Instead, pass in this's relevant global object's associated Document's URL.
parser->run("about:blank"sv);
} else {
// -> Otherwise
// 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.
MUST(document->append_child(*root));
}
}
// 3. Return document.
return document;
}
}
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