IListModel.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 <AUI/Common/AVector.h>
#include <AUI/Common/ASignal.h>
#include <AUI/Model/AListModelSelection.h>
#include <memory>
#include "AListModelRange.h"
#include "AUI/Common/AObject.h"
 
template<typename T>
class IListModel: public AObject 
{
public:
   using value_type = T;
   ~IListModel() override = default;
 
   virtual size_t listSize() = 0;
   virtual T listItemAt(const AListModelIndex& index) = 0;
 
   using stored_t = T;
 
   AListModelRange<T> range(const AListModelIndex& begin, const AListModelIndex& end) {
       return AListModelRange<T>(begin, end, std::dynamic_pointer_cast<IListModel<T>>(this->shared_from_this()));
   }
 
   AListModelRange<T> range(const AListModelIndex& item) {
       return AListModelRange<T>(item, {item.getRow() + 1}, std::dynamic_pointer_cast<IListModel<T>>(this->shared_from_this()));
   }
 
 
   AVector<T> toVector() noexcept {
       AVector<T> result;
       size_t size = listSize();
       result.reserve(size);
       for (size_t i = 0; i < size; ++i) {
           result << listItemAt(i);
       }
       return result;
   }
 
   template<typename Filter>
   AVector<AListModelRange<T>> rangesIncluding(Filter&& filter) {
       AVector<AListModelRange<T>> result;
       size_t currentBeginning = 0;
       size_t s = listSize();
       bool prevValue = false;
       bool currentValue;
 
       auto endSliceIfNecessary = [&](size_t i) {
           if (prevValue) {
               result << range(currentBeginning, i);
           }
       };
       for (size_t i = 0; i < s; ++i, prevValue = currentValue) {
           currentValue = filter(i);
           if (currentValue) {
               if (!prevValue) {
                   currentBeginning = i;
               }
           } else {
               endSliceIfNecessary(i);
           }
       }
       endSliceIfNecessary(listSize());
       return result;
   }
 
signals:
   emits<AListModelRange<T>> dataChanged;

   emits<AListModelRange<T>> dataInserted;

   emits<AListModelRange<T>> dataRemoved;
};

© 2025 AUI Framework Contributors. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. All trademarks are property of their respective owners.