/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * 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_GFX_ARRAY_VIEW_H_
#define MOZILLA_GFX_ARRAY_VIEW_H_

#include "nsTArray.h"

/* This is similar to mfbt/Range.h but has implicit conversion
 * from nsTArray and less bounds checking.
 * For now, prefer Range over ArrayView */

namespace mozilla {
namespace gfx {

template <typename T>
class ArrayView {
 public:
  MOZ_IMPLICIT ArrayView(const nsTArray<T>& aData)
      : mData(aData.Elements()), mLength(aData.Length()) {}
  ArrayView(const T* aData, const size_t aLength)
      : mData(aData), mLength(aLength) {}
  const T& operator[](const size_t aIdx) const { return mData[aIdx]; }
  size_t Length() const { return mLength; }
  const T* Data() const { return mData; }

 private:
  const T* mData;
  const size_t mLength;
};

}  // namespace gfx
}  // namespace mozilla

#endif /* MOZILLA_GFX_ARRAY_VIEW_H_ */