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LibHTML: Add inserted_into() and removed_from() TreeNode callbacks

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These will be called when a Node or LayoutNode is inserted or removed
from a tree. They get the parent node as an argument.
This commit is contained in:
Andreas Kling 2019-09-29 17:40:39 +02:00
parent 402c6de5c9
commit 7912592f89
4 changed files with 26 additions and 5 deletions
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9
Libraries/LibHTML/TreeNode.h
View file

@ -33,7 +33,7 @@ public:
const T* first_child() const { return m_first_child; }
const T* last_child() const { return m_last_child; }
void append_child(NonnullRefPtr<T> node);
void append_child(NonnullRefPtr<T> node, bool call_inserted_into = true);
void donate_all_children_to(T& node);
protected:
@ -49,16 +49,19 @@ private:
};
template<typename T>
inline void TreeNode<T>::append_child(NonnullRefPtr<T> node)
inline void TreeNode<T>::append_child(NonnullRefPtr<T> node, bool call_inserted_into)
{
ASSERT(!node->m_parent);
if (m_last_child)
m_last_child->m_next_sibling = node.ptr();
node->m_previous_sibling = m_last_child;
node->m_parent = static_cast<T*>(this);
m_last_child = &node.leak_ref();
m_last_child = node.ptr();
if (!m_first_child)
m_first_child = m_last_child;
if (call_inserted_into)
node->inserted_into(static_cast<T&>(*this));
(void)node.leak_ref();
}
template<typename T>