56 lines
1.0 KiB
C
56 lines
1.0 KiB
C
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#ifndef NTX_UNDO_STACK_H
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#define NTX_UNDO_STACK_H
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#include <ntxicommand.h>
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#include <vector>
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#include <functional>
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namespace ntx
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{
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class NtxUndoStack
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{
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public:
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NtxUndoStack();
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~NtxUndoStack() = default;
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NtxUndoStack(const NtxUndoStack&) = delete;
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NtxUndoStack& operator=(const NtxUndoStack&) = delete;
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void push(NtxCommandUPtr command);
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bool canUndo() const;
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bool canRedo() const;
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void undo();
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void redo();
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int index() const;
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int count() const;
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NtxString undoText() const;
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NtxString redoText() const;
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void clear();
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void setClean();
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bool isClean() const;
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void setUndoLimit(int limit);
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int undoLimit() const;
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const NtxICommand* command(int index) const;
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private:
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std::vector<NtxCommandUPtr> m_commands;
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int m_index;
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int m_cleanIndex;
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int m_undoLimit;
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void checkUndoLimit();
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};
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} // namespace ntx
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#endif // NTX_UNDO_STACK_H
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