102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
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#ifndef NTX_NODECOMMANDS_H
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#define NTX_NODECOMMANDS_H
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#include <ntxicommand.h>
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namespace ntx
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{
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// =========================================================================
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// Atomar: Knoten einfügen
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// =========================================================================
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/**
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* @brief Fügt einen Knoten an einer Position ein.
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* Undo entfernt ihn wieder.
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*/
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class NtxInsertNodeCmd : public NtxICommand
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{
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public:
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NtxInsertNodeCmd(NtxNodePtr parent, NtxNodePtr node, size_t index);
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bool execute() override;
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bool undo() override;
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bool canExecute() const override;
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private:
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NtxNodePtr m_parent;
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NtxNodePtr m_node;
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size_t m_index;
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bool m_executed{false};
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};
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// =========================================================================
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// Atomar: Knoten entfernen
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// =========================================================================
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/**
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* @brief Entfernt einen Knoten. Merkt sich Parent + Position für Undo.
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*/
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class NtxRemoveNodeCmd : public NtxICommand
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{
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public:
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explicit NtxRemoveNodeCmd(NtxNodePtr node);
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bool execute() override;
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bool undo() override;
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bool canExecute() const override;
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private:
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NtxNodePtr m_node;
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NtxNodePtr m_parent;
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size_t m_index{0};
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bool m_executed{false};
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};
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// =========================================================================
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// Makro-Command (Composite Command)
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// =========================================================================
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/**
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* @brief Führt mehrere Commands als atomare Einheit aus.
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*
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* execute(): Alle Commands vorwärts ausführen.
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* undo(): Alle Commands rückwärts rückgängig machen.
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* Bei Fehler: Rollback der bereits ausgeführten.
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*/
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class NtxMacroCommand : public NtxICommand
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{
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public:
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NtxMacroCommand() = default;
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explicit NtxMacroCommand(const NtxString& description);
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/// Factory: Erzeugt ein Makro aus einer Liste von Commands.
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static NtxCommandUPtr create(
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const NtxString& description,
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std::vector<NtxCommandUPtr> commands);
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void add(NtxCommandUPtr cmd);
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bool execute() override;
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bool undo() override;
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bool canExecute() const override;
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size_t commandCount() const { return m_commands.size(); }
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private:
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std::vector<NtxCommandUPtr> m_commands;
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size_t m_executedCount{0};
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};
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} // namespace ntx
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#endif // NTX_NODECOMMANDS_H
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