Kyle Isom
ac0eadc345
- Implemented robust undo system supporting coalescing of text operations (insert, backspace, delete). - Added `UndoSystem` integration into the editor/commands pipeline. - Wrote extensive unit tests for various undo/redo scenarios, including multiline operations, cursor preservation, and history management. - Refactored to ensure consistent cursor behavior during undo/redo actions. - Updated CMake to include new tests.
60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
#pragma once
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#include <string_view>
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#include <cstddef>
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#include <cstdint>
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#include "UndoTree.h"
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class Buffer;
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class UndoSystem {
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public:
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explicit UndoSystem(Buffer &owner, UndoTree &tree);
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void Begin(UndoType type);
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void Append(char ch);
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void Append(std::string_view text);
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void commit();
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void undo();
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void redo();
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void mark_saved();
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void discard_pending();
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void clear();
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void UpdateBufferReference(Buffer &new_buf);
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private:
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enum class PendingAppendMode : std::uint8_t {
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Append,
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Prepend,
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};
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void apply(const UndoNode *node, int direction); // +1 redo, -1 undo
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void free_node(UndoNode *node);
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void free_branch(UndoNode *node); // frees redo siblings only
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UndoNode *find_parent(UndoNode *from, UndoNode *target);
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// Debug helpers (compiled only when KTE_UNDO_DEBUG is defined)
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void debug_log(const char *op) const;
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static const char *type_str(UndoType t);
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static bool is_descendant(UndoNode *root, const UndoNode *target);
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void update_dirty_flag();
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PendingAppendMode pending_mode_ = PendingAppendMode::Append;
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Buffer *buf_;
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UndoTree &tree_;
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}; |