modeliterator.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#include "modeliterator.h"
#include <QAbstractItemModel>
#include <QtDebug>
 
namespace LC::Util
{
    ModelIterator::ModelIterator (const QAbstractItemModel *model,
            int row, int col, ModelIterator::Direction dir, const QModelIndex& parent)
    : Model_ (model)
    , Parent_ (parent)
    , Row_ (row)
    , Col_ (col)
    , Dir_ (dir)
    {
    }
 
    ModelIterator& ModelIterator::operator++ ()
    {
        ++GetIncrementable ();
        return *this;
    }
 
    ModelIterator ModelIterator::operator++ (int)
    {
        ModelIterator oldThis (*this);
        ++GetIncrementable ();
        return oldThis;
    }
 
    ModelIterator& ModelIterator::operator-- ()
    {
        --GetIncrementable ();
        return *this;
    }
 
    ModelIterator ModelIterator::operator-- (int)
    {
        ModelIterator oldThis (*this);
        --GetIncrementable ();
        return oldThis;
    }
 
    ModelIterator& ModelIterator::operator+= (int diff)
    {
        GetIncrementable () += diff;
        return *this;
    }
 
    ModelIterator& ModelIterator::operator-= (int diff)
    {
        GetIncrementable () -= diff;
        return *this;
    }
 
    int ModelIterator::operator- (const ModelIterator& other) const
    {
        return GetIncrementable () - other.GetIncrementable ();
    }
 
    bool operator== (const ModelIterator& left, const ModelIterator& right)
    {
        return left.Row_ == right.Row_ &&
                left.Col_ == right.Col_ &&
                left.Model_ == right.Model_ &&
                left.Parent_ == right.Parent_;
    }
 
    QModelIndex ModelIterator::operator* () const
    {
        return Model_->index (Row_, Col_, Parent_);
    }
 
    int ModelIterator::GetRow () const
    {
        return Row_;
    }
 
    int ModelIterator::GetCol () const
    {
        return Col_;
    }
 
    ModelIterator::Direction ModelIterator::GetDirection () const
    {
        return Dir_;
    }
 
    int& ModelIterator::GetIncrementable ()
    {
        switch (Dir_)
        {
        case Direction::Rows:
            return Row_;
        case Direction::Cols:
            return Col_;
        }
 
        qWarning () << Q_FUNC_INFO
                << "unknown direction";
        return Row_;
    }
 
    int ModelIterator::GetIncrementable () const
    {
        switch (Dir_)
        {
        case Direction::Rows:
            return Row_;
        case Direction::Cols:
            return Col_;
        }
 
        qWarning () << Q_FUNC_INFO
                << "unknown direction";
        return Row_;
    }
 
    bool UTIL_MODELS_API operator== (const ModelIterator& left, const ModelRange::Sentinel& right)
    {
        switch (left.GetDirection ())
        {
        case ModelIterator::Direction::Rows:
            return left.GetRow () == right.End_;
        case ModelIterator::Direction::Cols:
            return left.GetCol () == right.End_;
        }
 
        std::unreachable ();
    }
}