AListModelRange.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * 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/.
 */
 
#pragma once
 
 
#include "AListModelIndex.h"
#include <AUI/Common/SharedPtr.h>
#include <cassert>
 
 
template<typename T> class IListModel;
 
template <typename T>
class AListModelRange {
private:
   AListModelIndex mBegin;
   AListModelIndex mEnd;
   _<IListModel<T>> mModel;
 
public:
   AListModelRange() = default;
   AListModelRange(const AListModelIndex& begin, const AListModelIndex& end, _<IListModel<T>> model) : mBegin(begin),
                                                                                               mEnd(end),
                                                                                               mModel(std::move(model)) {}
 
   bool operator==(const AListModelRange& rhs) const {
       return std::tie(mBegin, mEnd, mModel) == std::tie(rhs.mBegin, rhs.mEnd, rhs.mModel);
   }
 
   class Iterator {
   private:
       AListModelIndex mIndex;
       _<IListModel<T>> mModel;
 
 
   public:
       Iterator(const AListModelIndex& index, _<IListModel<T>> model):
               mIndex(index), mModel(std::move(model)) {}
 
       Iterator& operator*() {
           return *this;
       }
 
       auto& operator->() {
           return mModel->listItemAt(mIndex);
       }
       auto get() const {
           return mModel->listItemAt(mIndex);
       }
 
       Iterator& operator++() {
           mIndex = {mIndex.getRow() + 1, mIndex.getColumn()};
           return *this;
       }
 
       bool operator!=(const Iterator& other) const {
           AUI_ASSERT(mModel == other.mModel);
           return mIndex.getRow() != other.mIndex.getRow();
       }
 
       bool operator==(const Iterator& other) const {
           AUI_ASSERT(mModel == other.mModel);
           return mIndex.getRow() == other.mIndex.getRow();
       }
 
       [[nodiscard]] const AListModelIndex& getIndex() const {
           return mIndex;
       }
   };
 
   AListModelRange<T>::Iterator begin() const {
       return {mBegin, mModel};
   }
   AListModelRange<T>::Iterator end() const {
       return {mEnd, mModel};
   }
 
   [[nodiscard]] const AListModelIndex& getBegin() const {
       return mBegin;
   }
 
   [[nodiscard]] const AListModelIndex& getEnd() const {
       return mEnd;
   }
 
   const _<IListModel<T>>& getModel() const {
       return mModel;
   }
};
 
 
template<typename T>
inline std::ostream& operator<<(std::ostream& o, const AListModelRange<T>& range) {
   o << "[ " << range.getBegin() << "; " << range.getEnd() << " )";
 
   return o;
}
 
#include "IListModel.h"

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