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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef mozilla_dom_TreeOrderedArrayInlines_h
#define mozilla_dom_TreeOrderedArrayInlines_h
#include "mozilla/dom/TreeOrderedArray.h"
#include "mozilla/BinarySearch.h"
#include "nsContentUtils.h"
#include <type_traits>
namespace mozilla::dom {
template <typename Node>
size_t TreeOrderedArray<Node>::Insert(Node& aNode, nsINode* aCommonAncestor) {
static_assert(std::is_base_of_v<nsINode, Node>, "Should be a node");
if (mList.IsEmpty()) {
return 0;
struct PositionComparator {
Node& mNode;
nsINode* mCommonAncestor;
PositionComparator(Node& aNode, nsINode* aCommonAncestor)
: mNode(aNode), mCommonAncestor(aCommonAncestor) {}
int operator()(void* aNode) const {
auto* curNode = static_cast<Node*>(aNode);
"Tried to insert a node already in the list");
return nsContentUtils::CompareTreePosition<TreeKind::DOM>(
&mNode, curNode, mCommonAncestor);
size_t idx;
BinarySearchIf(mList, 0, mList.Length(),
PositionComparator(aNode, aCommonAncestor), &idx);
mList.InsertElementAt(idx, &aNode);
return idx;
} // namespace mozilla::dom