24 lines
493 B
C++
24 lines
493 B
C++
#pragma once
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#include <cstdint>
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#include <string>
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enum class UndoType : std::uint8_t {
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Insert,
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Delete,
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Paste,
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Newline,
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DeleteRow,
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};
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struct UndoNode {
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UndoType type{};
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int row{};
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int col{};
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std::uint64_t group_id = 0; // 0 means ungrouped; non-zero means undo/redo as an atomic group
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std::string text;
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UndoNode *parent = nullptr; // previous state; null means pre-first-edit
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UndoNode *child = nullptr; // next in current timeline
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UndoNode *next = nullptr; // redo branch
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};
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