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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({},{},{})", value.row(), value.column(), value.internal_data());
- return Formatter<FormatString>::format(builder, "ModelIndex({},{})", 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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