53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
#include <stddef.h>
|
|
|
|
#include "abuf.h"
|
|
|
|
|
|
#ifndef KE_UNDO_H
|
|
#define KE_UNDO_H
|
|
|
|
|
|
struct buffer;
|
|
|
|
|
|
typedef enum undo_kind {
|
|
UNDO_INSERT = 1 << 0,
|
|
UNDO_UNKNOWN = 1 << 1,
|
|
} undo_kind;
|
|
|
|
|
|
typedef struct undo_node {
|
|
undo_kind kind;
|
|
size_t row, col;
|
|
abuf text;
|
|
|
|
struct undo_node *next;
|
|
struct undo_node *parent;
|
|
|
|
} undo_node;
|
|
|
|
|
|
typedef struct undo_tree {
|
|
undo_node *root; /* the start of the undo sequence */
|
|
undo_node *current; /* where we are currently at */
|
|
undo_node *pending; /* the current undo operations being built */
|
|
} undo_tree;
|
|
|
|
|
|
undo_node *undo_node_new(undo_kind kind);
|
|
void undo_node_free(undo_node *node);
|
|
void undo_tree_init(undo_tree *tree);
|
|
void undo_tree_free(undo_tree *tree);
|
|
void undo_begin(undo_tree *tree, undo_kind kind);
|
|
void undo_prepend(undo_tree *tree, abuf *buf);
|
|
void undo_append(undo_tree *tree, abuf *buf);
|
|
void undo_prependch(undo_tree *tree, char c);
|
|
void undo_appendch(undo_tree *tree, char c);
|
|
void undo_commit(undo_tree *tree);
|
|
void undo_apply(struct buffer *buf);
|
|
void editor_undo(struct buffer *buf);
|
|
void editor_redo(struct buffer *buf);
|
|
|
|
|
|
#endif
|