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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Format.h>
#include <AK/Traits.h>
#include <LibGUI/Forward.h>
#include <LibGUI/ModelRole.h>
namespace GUI {
class ModelIndex {
friend class Model;
public:
ModelIndex() = default;
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 is_parent_of(ModelIndex const&) const;
bool operator==(ModelIndex const& 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!=(ModelIndex const& other) const
{
return !(*this == other);
}
Model const* model() const { return m_model; }
Variant data(ModelRole = ModelRole::Display) const;
ModelIndex sibling(int row, int column) const;
ModelIndex sibling_at_column(int column) const;
private:
ModelIndex(Model const& model, int row, int column, void* internal_data)
: m_model(&model)
, m_row(row)
, m_column(column)
, m_internal_data(internal_data)
{
}
Model const* m_model { nullptr };
int m_row { -1 };
int m_column { -1 };
void* m_internal_data { nullptr };
};
}
namespace AK {
template<>
struct Formatter<GUI::ModelIndex> : Formatter<FormatString> {
ErrorOr<void> format(FormatBuilder& builder, GUI::ModelIndex const& value)
{
if (value.internal_data())
return Formatter<FormatString>::format(builder, "ModelIndex({},{},{})"sv, value.row(), value.column(), value.internal_data());
return Formatter<FormatString>::format(builder, "ModelIndex({},{})"sv, value.row(), value.column());
}
};
template<>
struct Traits<GUI::ModelIndex> : public GenericTraits<GUI::ModelIndex> {
static unsigned hash(const GUI::ModelIndex& index)
{
return pair_int_hash(pair_int_hash(index.row(), index.column()), reinterpret_cast<FlatPtr>(index.internal_data()));
}
};
}
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