added nodes.

nodes/services/ntxcmdlist.h

@@ -0,0 +1,42 @@
+#ifndef NTX_CMDLIST_H
+#define NTX_CMDLIST_H
+
+#include <ntxicommand.h>
+#include <vector>
+
+namespace ntx
+{
+
+  class NtxCmdList : public NtxICommand
+  {
+  public:
+
+    NtxCmdList();
+    explicit NtxCmdList(const NtxString& description);
+    ~NtxCmdList() override = default;
+
+    bool execute() override;
+    bool undo() override;
+
+    bool canExecute() const override;
+    bool canUndo() const override;
+
+    NtxString getDescription() const override;
+
+    void addCommand(NtxCommandUPtr command);
+    void clear();
+
+    size_t count() const;
+    bool isEmpty() const;
+
+  private:
+
+    std::vector<NtxCommandUPtr> m_commands;
+    size_t m_executedCount;
+
+    void rollback(size_t upToIndex);
+  };
+
+} // namespace ntx
+
+#endif // NTX_CMDLIST_H