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LibWeb: Expose ParentNode.{first,last}ElementChild

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I needed these to write the event dispatcher test.
This commit is contained in:
Luke 2020-11-21 18:49:09 +00:00 committed by Andreas Kling
parent e8b3a65581
commit c5e15d9282
Notes: sideshowbarker 2024-07-19 01:18:42 +09:00 
Author: https://github.com/Lubrsi
Commit: https://github.com/SerenityOS/serenity/commit/c5e15d92823
Pull-request: https://github.com/SerenityOS/serenity/pull/4131
Reviewed-by: https://github.com/awesomekling
6 changed files with 41 additions and 1 deletions
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6
Libraries/LibWeb/DOM/Document.idl
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@ -8,8 +8,12 @@ interface Document : Node {
readonly attribute DOMString contentType;
Element? getElementById(DOMString id);
Element? querySelector(DOMString selectors);
ArrayFromVector getElementsByTagName(DOMString tagName);
readonly attribute Element? firstElementChild;
readonly attribute Element? lastElementChild;
Element? querySelector(DOMString selectors);
ArrayFromVector querySelectorAll(DOMString selectors);
Element createElement(DOMString tagName);

4
Libraries/LibWeb/DOM/DocumentFragment.idl
View file

@ -1,6 +1,10 @@
interface DocumentFragment : Node {
Element? getElementById(DOMString id);
readonly attribute Element? firstElementChild;
readonly attribute Element? lastElementChild;
Element? querySelector(DOMString selectors);
ArrayFromVector querySelectorAll(DOMString selectors);

3
Libraries/LibWeb/DOM/Element.idl
View file

@ -5,6 +5,9 @@ interface Element : Node {
DOMString? getAttribute(DOMString qualifiedName);
void setAttribute(DOMString qualifiedName, DOMString value);
readonly attribute Element? firstElementChild;
readonly attribute Element? lastElementChild;
Element? querySelector(DOMString selectors);
ArrayFromVector querySelectorAll(DOMString selectors);

10
Libraries/LibWeb/DOM/ParentNode.cpp
View file

@ -70,4 +70,14 @@ NonnullRefPtrVector<Element> ParentNode::query_selector_all(const StringView& se
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>();
}
}

3
Libraries/LibWeb/DOM/ParentNode.h
View file

@ -38,6 +38,9 @@ public:
template<typename F>
void for_each_child(F);
RefPtr<Element> first_element_child();
RefPtr<Element> last_element_child();
RefPtr<Element> query_selector(const StringView&);
NonnullRefPtrVector<Element> query_selector_all(const StringView&);

16
Libraries/LibWeb/TreeNode.h
View file

@ -255,6 +255,12 @@ public:
return const_cast<TreeNode*>(this)->template first_child_of_type<U>();
}
template<typename U>
const U* last_child_of_type() const
{
return const_cast<TreeNode*>(this)->template last_child_of_type<U>();
}
template<typename U>
U* first_child_of_type()
{
@ -265,6 +271,16 @@ public:
return nullptr;
}
template<typename U>
U* last_child_of_type()
{
for (auto* child = last_child(); child; child = child->previous_sibling()) {
if (is<U>(*child))
return &downcast<U>(*child);
}
return nullptr;
}
template<typename U>
const U* first_ancestor_of_type() const
{