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64 lines
2.5 KiB
C++
64 lines
2.5 KiB
C++
/*
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Heap/Heap.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/DocumentFragment.h>
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#include <LibWeb/DOMParsing/InnerHTML.h>
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#include <LibWeb/HTML/Parser/HTMLParser.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::DOMParsing {
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// https://w3c.github.io/DOM-Parsing/#dfn-fragment-parsing-algorithm
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WebIDL::ExceptionOr<JS::NonnullGCPtr<DOM::DocumentFragment>> parse_fragment(StringView markup, DOM::Element& context_element)
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{
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// FIXME: Handle XML documents.
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auto& realm = context_element.realm();
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auto new_children = HTML::HTMLParser::parse_html_fragment(context_element, markup);
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auto fragment = realm.heap().allocate<DOM::DocumentFragment>(realm, context_element.document());
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for (auto& child : new_children) {
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// I don't know if this can throw here, but let's be safe.
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(void)TRY(fragment->append_child(*child));
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}
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return fragment;
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}
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// https://w3c.github.io/DOM-Parsing/#dom-innerhtml-innerhtml
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WebIDL::ExceptionOr<void> inner_html_setter(JS::NonnullGCPtr<DOM::Node> context_object, StringView value)
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{
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// 1. Let context element be the context object's host if the context object is a ShadowRoot object, or the context object otherwise.
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// (This is handled in Element and ShadowRoot)
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JS::NonnullGCPtr<DOM::Element> context_element = is<DOM::ShadowRoot>(*context_object) ? *verify_cast<DOM::ShadowRoot>(*context_object).host() : verify_cast<DOM::Element>(*context_object);
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// 2. Let fragment be the result of invoking the fragment parsing algorithm with the new value as markup, and with context element.
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auto fragment = TRY(parse_fragment(value, context_element));
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// 3. If the context object is a template element, then let context object be the template's template contents (a DocumentFragment).
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if (is<HTML::HTMLTemplateElement>(*context_object))
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context_object = verify_cast<HTML::HTMLTemplateElement>(*context_object).content();
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// 4. Replace all with fragment within the context object.
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context_object->replace_all(fragment);
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// NOTE: We don't invalidate style & layout for <template> elements since they don't affect rendering.
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if (!is<HTML::HTMLTemplateElement>(*context_object)) {
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context_object->set_needs_style_update(true);
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// NOTE: Since the DOM has changed, we have to rebuild the layout tree.
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context_object->document().invalidate_layout();
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context_object->document().set_needs_layout();
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}
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return {};
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}
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}
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