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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
6 changed files with 41 additions and 1 deletions
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16
Libraries/LibWeb/TreeNode.h
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@ -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
{