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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 http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_TreeOrderedArray_h
#define mozilla_dom_TreeOrderedArray_h
#include "nsTArray.h"
class nsINode;
template <typename T>
class RefPtr;
namespace mozilla::dom {
// A sorted tree-ordered list of pointers (either raw or RefPtr) to nodes.
template <typename NodePointer>
class TreeOrderedArray {
template <typename T>
struct RawTypeExtractor {};
template <typename T>
struct RawTypeExtractor<T*> {
using type = T;
};
template <typename T>
struct RawTypeExtractor<RefPtr<T>> {
using type = T;
};
using Node = typename RawTypeExtractor<NodePointer>::type;
public:
operator const nsTArray<NodePointer>&() const { return mList; }
const nsTArray<NodePointer>& AsList() const { return mList; }
const nsTArray<NodePointer>* operator->() const { return &mList; }
// Inserts a node into the list, and returns the new index in the array.
//
// All the nodes in the list should be in the same subtree, and debug builds
// assert this.
//
// It's also forbidden to call Insert() with the same node multiple times, and
// it will assert as well.
//
// You can provide a potential common ancestor to speed up comparisons, see
// nsContentUtils::CompareTreePosition. That's only a hint.
inline size_t Insert(Node&, nsINode* aCommonAncestor = nullptr);
bool RemoveElement(Node& aNode) { return mList.RemoveElement(&aNode); }
void RemoveElementAt(size_t aIndex) { mList.RemoveElementAt(aIndex); }
void Clear() { mList.Clear(); }
private:
AutoTArray<NodePointer, 1> mList;
};
} // namespace mozilla::dom
#endif
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