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LibHTML: Add Node::first_ancestor_of_type<T>()

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Here's another helper for finding the first ancestor of a Node of a
specific type.
This commit is contained in:
Andreas Kling 2019-10-06 21:07:36 +02:00
parent 03725c6135
commit a239ef34d5
2 changed files with 15 additions and 6 deletions
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13
Libraries/LibHTML/DOM/Node.h
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@ -50,6 +50,9 @@ public:
template<typename T>
const T* first_child_of_type() const;
template<typename T>
const T* first_ancestor_of_type() const;
virtual void inserted_into(Node&) {}
virtual void removed_from(Node&) {}
@ -130,3 +133,13 @@ inline const T* Node::first_child_of_type() const
}
return nullptr;
}
template<typename T>
inline const T* Node::first_ancestor_of_type() const
{
for (auto* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
if (is<T>(*ancestor))
return to<T>(ancestor);
}
return nullptr;
}