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LibWeb: Add Node.insertBefore(Node node, Node? child)
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4 changed files with 43 additions and 0 deletions
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@ -110,6 +110,7 @@ public:
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void prepend_child(NonnullRefPtr<T> node);
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void append_child(NonnullRefPtr<T> node, bool notify = true);
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void insert_before(NonnullRefPtr<T> node, RefPtr<T> child, bool notify = true);
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NonnullRefPtr<T> remove_child(NonnullRefPtr<T> node);
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void donate_all_children_to(T& node);
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@ -252,6 +253,33 @@ inline void TreeNode<T>::append_child(NonnullRefPtr<T> node, bool notify)
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static_cast<T*>(this)->children_changed();
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}
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template<typename T>
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inline void TreeNode<T>::insert_before(NonnullRefPtr<T> node, RefPtr<T> child, bool notify)
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{
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if (!child)
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return append_child(move(node), notify);
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ASSERT(!node->m_parent);
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ASSERT(child->parent() == this);
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if (!static_cast<T*>(this)->is_child_allowed(*node))
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return;
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node->m_previous_sibling = child->m_previous_sibling;
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node->m_next_sibling = child;
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if (m_first_child == child)
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m_first_child = node;
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node->m_parent = static_cast<T*>(this);
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if (notify)
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node->inserted_into(static_cast<T&>(*this));
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(void)node.leak_ref();
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if (notify)
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static_cast<T*>(this)->children_changed();
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}
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template<typename T>
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inline void TreeNode<T>::prepend_child(NonnullRefPtr<T> node)
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{
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