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/*
* Copyright (c) 2020, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/CSS/Parser/Parser.h>
#include <LibWeb/CSS/SelectorEngine.h>
#include <LibWeb/DOM/ParentNode.h>
#include <LibWeb/Dump.h>
namespace Web::DOM {
ExceptionOr<RefPtr<Element>> ParentNode::query_selector(StringView selector_text)
{
auto maybe_selectors = parse_selector(CSS::ParsingContext(*this), selector_text);
if (!maybe_selectors.has_value())
return DOM::SyntaxError::create("Failed to parse selector");
auto selectors = maybe_selectors.value();
for (auto& selector : selectors)
dump_selector(selector);
RefPtr<Element> result;
for_each_in_inclusive_subtree_of_type<Element>([&](auto& element) {
for (auto& selector : selectors) {
if (SelectorEngine::matches(selector, element)) {
result = element;
return IterationDecision::Break;
}
}
return IterationDecision::Continue;
});
return result;
}
ExceptionOr<NonnullRefPtrVector<Element>> ParentNode::query_selector_all(StringView selector_text)
{
auto maybe_selectors = parse_selector(CSS::ParsingContext(*this), selector_text);
if (!maybe_selectors.has_value())
return DOM::SyntaxError::create("Failed to parse selector");
auto selectors = maybe_selectors.value();
for (auto& selector : selectors)
dump_selector(selector);
NonnullRefPtrVector<Element> elements;
for_each_in_inclusive_subtree_of_type<Element>([&](auto& element) {
for (auto& selector : selectors) {
if (SelectorEngine::matches(selector, element)) {
elements.append(element);
}
}
return IterationDecision::Continue;
});
return elements;
}
RefPtr<Element> ParentNode::first_element_child()
{
return first_child_of_type<Element>();
}
RefPtr<Element> ParentNode::last_element_child()
{
return last_child_of_type<Element>();
}
// https://dom.spec.whatwg.org/#dom-parentnode-childelementcount
u32 ParentNode::child_element_count() const
{
u32 count = 0;
for (auto* child = first_child(); child; child = child->next_sibling()) {
if (is<Element>(child))
++count;
}
return count;
}
}
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