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https://github.com/RGBCube/serenity
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295cc123c7
Since we keep a stack of command combos, let's call entries on the stack "Combo" instead of "UndoCommandsContainer". And since it has a vector of commands, let's call it "commands" instead of "m_undo_vector".
44 lines
900 B
C++
44 lines
900 B
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullOwnPtrVector.h>
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#include <LibGUI/Forward.h>
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namespace GUI {
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class UndoStack {
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public:
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UndoStack();
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~UndoStack();
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void push(NonnullOwnPtr<Command>&&);
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bool can_undo() const { return m_stack_index < m_stack.size() && !m_stack.is_empty(); }
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bool can_redo() const { return m_stack_index > 0 && !m_stack.is_empty() && m_stack[m_stack_index - 1].commands.size() > 0; }
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void undo();
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void redo();
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void finalize_current_combo();
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void set_current_unmodified();
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bool is_current_modified() const;
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void clear();
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private:
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struct Combo {
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NonnullOwnPtrVector<Command> commands;
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};
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NonnullOwnPtrVector<Combo> m_stack;
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size_t m_stack_index { 0 };
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Optional<size_t> m_clean_index;
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};
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}
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