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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Traits.h>
#include <LibGUI/Forward.h>
#include <LibGUI/ModelRole.h>
namespace GUI {
class ModelIndex {
friend class Model;
public:
ModelIndex() { }
bool is_valid() const { return m_model && m_row != -1 && m_column != -1; }
int row() const { return m_row; }
int column() const { return m_column; }
void* internal_data() const { return m_internal_data; }
ModelIndex parent() const;
bool operator==(const ModelIndex& other) const
{
return m_model == other.m_model && m_row == other.m_row && m_column == other.m_column && m_internal_data == other.m_internal_data;
}
bool operator!=(const ModelIndex& other) const
{
return !(*this == other);
}
const Model* model() const { return m_model; }
Variant data(ModelRole = ModelRole::Display) const;
private:
ModelIndex(const Model& model, int row, int column, void* internal_data)
: m_model(&model)
, m_row(row)
, m_column(column)
, m_internal_data(internal_data)
{
}
const Model* m_model { nullptr };
int m_row { -1 };
int m_column { -1 };
void* m_internal_data { nullptr };
};
const LogStream& operator<<(const LogStream&, const ModelIndex&);
}
namespace AK {
template<>
struct Formatter<GUI::ModelIndex> : Formatter<StringView> {
void format(TypeErasedFormatParams&, FormatBuilder&, const GUI::ModelIndex&);
};
template<>
struct Traits<GUI::ModelIndex> : public GenericTraits<GUI::ModelIndex> {
static unsigned hash(const GUI::ModelIndex& index) { return pair_int_hash(index.row(), index.column()); }
};
}
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