Kyle Isom
a9bcb0d36b
+ editor removes per-buffer fields. + switching from internal use of 'int' to 'size_t'. + deleting old code + double checking relevancy of comments. A lot has changed in 5 years, even more so in the past week. + fixing a few vestigal memory errors from the overhaul. + fixing search behavior
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <stddef.h>
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#include "abuf.h"
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#include "editor.h"
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#ifndef KE_UNDO_H
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#define KE_UNDO_H
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typedef enum undo_kind {
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UNDO_INSERT = 1 << 0,
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UNDO_UNKNOWN = 1 << 1,
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} undo_kind;
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typedef struct undo_node {
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undo_kind kind;
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size_t row, col;
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abuf text;
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struct undo_node *next;
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struct undo_node *parent;
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} undo_node;
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typedef struct undo_tree {
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undo_node *root; /* the start of the undo sequence */
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undo_node *current; /* where we are currently at */
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undo_node *pending; /* the current undo operations being built */
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} undo_tree;
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undo_node *undo_node_new(undo_kind kind);
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void undo_node_free(undo_node *node);
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void undo_tree_init(undo_tree *tree);
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void undo_tree_free(undo_tree *tree);
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void undo_begin(undo_tree *tree, undo_kind kind);
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void undo_prepend(undo_tree *tree, abuf *buf);
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void undo_append(undo_tree *tree, abuf *buf);
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void undo_prependch(undo_tree *tree, char c);
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void undo_appendch(undo_tree *tree, char c);
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void undo_commit(undo_tree *tree);
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void undo_apply(struct editor *editor);
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void editor_undo(undo_tree *tree);
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void editor_redo(undo_tree *tree);
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#endif
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