Kyle Isom
cc8df36bdf
- Added branching model for undo/redo, enabling multiple redo paths and branch selection. - Updated `UndoNode` to include `parent` and refined hierarchical navigation. - Extended `UndoSystem` with branching logic for redo operations, supporting sibling branch selection. - Overhauled tests to validate branching behavior and tree invariants. - Refined editor command logic for undo/redo with repeat counts and branch selection. - Enabled test-only introspection hooks for undo tree validation. - Updated CMake to include test definitions (`KTE_TESTS` flag).
71 lines
1.4 KiB
C++
71 lines
1.4 KiB
C++
#pragma once
|
|
#include <string_view>
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
|
|
#include "UndoTree.h"
|
|
|
|
|
|
class Buffer;
|
|
|
|
class UndoSystem {
|
|
public:
|
|
explicit UndoSystem(Buffer &owner, UndoTree &tree);
|
|
|
|
void Begin(UndoType type);
|
|
|
|
void Append(char ch);
|
|
|
|
void Append(std::string_view text);
|
|
|
|
void commit();
|
|
|
|
void undo();
|
|
|
|
// Redo the current node's active child branch.
|
|
// If `branch_index` > 0, selects that redo sibling (0-based) and makes it active.
|
|
// When current is null (pre-first-edit), branches are selected among `tree_.root` siblings.
|
|
void redo(int branch_index = 0);
|
|
|
|
void mark_saved();
|
|
|
|
void discard_pending();
|
|
|
|
void clear();
|
|
|
|
void UpdateBufferReference(Buffer &new_buf);
|
|
|
|
#if defined(KTE_TESTS)
|
|
// Test-only introspection hook.
|
|
const UndoTree &TreeForTests() const
|
|
{
|
|
return tree_;
|
|
}
|
|
#endif
|
|
|
|
private:
|
|
enum class PendingAppendMode : std::uint8_t {
|
|
Append,
|
|
Prepend,
|
|
};
|
|
|
|
void apply(const UndoNode *node, int direction); // +1 redo, -1 undo
|
|
void free_node(UndoNode *node);
|
|
|
|
void free_branch(UndoNode *node); // frees redo siblings only
|
|
UndoNode *find_parent(UndoNode *from, UndoNode *target);
|
|
|
|
// Debug helpers (compiled only when KTE_UNDO_DEBUG is defined)
|
|
void debug_log(const char *op) const;
|
|
|
|
static const char *type_str(UndoType t);
|
|
|
|
static bool is_descendant(UndoNode *root, const UndoNode *target);
|
|
|
|
void update_dirty_flag();
|
|
|
|
PendingAppendMode pending_mode_ = PendingAppendMode::Append;
|
|
|
|
Buffer *buf_;
|
|
UndoTree &tree_;
|
|
}; |