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undo.c (157184) undo.c (165670)
1/* readline.c -- a general facility for reading lines of input
2 with emacs style editing and completion. */
3
1/* readline.c -- a general facility for reading lines of input
2 with emacs style editing and completion. */
3
4/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
4/* Copyright (C) 1987, 1989, 1992, 2006 Free Software Foundation, Inc.
5
6 This file is part of the GNU Readline Library, a library for
7 reading lines of text with interactive input and history editing.
8
9 The GNU Readline Library is free software; you can redistribute it
10 and/or modify it under the terms of the GNU General Public License
11 as published by the Free Software Foundation; either version 2, or
12 (at your option) any later version.

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45
46/* Some standard library routines. */
47#include "readline.h"
48#include "history.h"
49
50#include "rlprivate.h"
51#include "xmalloc.h"
52
5
6 This file is part of the GNU Readline Library, a library for
7 reading lines of text with interactive input and history editing.
8
9 The GNU Readline Library is free software; you can redistribute it
10 and/or modify it under the terms of the GNU General Public License
11 as published by the Free Software Foundation; either version 2, or
12 (at your option) any later version.

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45
46/* Some standard library routines. */
47#include "readline.h"
48#include "history.h"
49
50#include "rlprivate.h"
51#include "xmalloc.h"
52
53extern void replace_history_data PARAMS((int, histdata_t *, histdata_t *));
54
53/* Non-zero tells rl_delete_text and rl_insert_text to not add to
54 the undo list. */
55int _rl_doing_an_undo = 0;
56
57/* How many unclosed undo groups we currently have. */
58int _rl_undo_group_level = 0;
59
60/* The current undo list for THE_LINE. */
61UNDO_LIST *rl_undo_list = (UNDO_LIST *)NULL;
62
63/* **************************************************************** */
64/* */
65/* Undo, and Undoing */
66/* */
67/* **************************************************************** */
68
55/* Non-zero tells rl_delete_text and rl_insert_text to not add to
56 the undo list. */
57int _rl_doing_an_undo = 0;
58
59/* How many unclosed undo groups we currently have. */
60int _rl_undo_group_level = 0;
61
62/* The current undo list for THE_LINE. */
63UNDO_LIST *rl_undo_list = (UNDO_LIST *)NULL;
64
65/* **************************************************************** */
66/* */
67/* Undo, and Undoing */
68/* */
69/* **************************************************************** */
70
69/* Remember how to undo something. Concatenate some undos if that
70 seems right. */
71void
72rl_add_undo (what, start, end, text)
71static UNDO_LIST *
72alloc_undo_entry (what, start, end, text)
73 enum undo_code what;
74 int start, end;
75 char *text;
76{
73 enum undo_code what;
74 int start, end;
75 char *text;
76{
77 UNDO_LIST *temp = (UNDO_LIST *)xmalloc (sizeof (UNDO_LIST));
77 UNDO_LIST *temp;
78
79 temp = (UNDO_LIST *)xmalloc (sizeof (UNDO_LIST));
78 temp->what = what;
79 temp->start = start;
80 temp->end = end;
81 temp->text = text;
80 temp->what = what;
81 temp->start = start;
82 temp->end = end;
83 temp->text = text;
84
85 temp->next = (UNDO_LIST *)NULL;
86 return temp;
87}
88
89/* Remember how to undo something. Concatenate some undos if that
90 seems right. */
91void
92rl_add_undo (what, start, end, text)
93 enum undo_code what;
94 int start, end;
95 char *text;
96{
97 UNDO_LIST *temp;
98
99 temp = alloc_undo_entry (what, start, end, text);
82 temp->next = rl_undo_list;
83 rl_undo_list = temp;
84}
85
86/* Free the existing undo list. */
87void
88rl_free_undo_list ()
89{
100 temp->next = rl_undo_list;
101 rl_undo_list = temp;
102}
103
104/* Free the existing undo list. */
105void
106rl_free_undo_list ()
107{
108 UNDO_LIST *release, *orig_list;
109
110 orig_list = rl_undo_list;
90 while (rl_undo_list)
91 {
111 while (rl_undo_list)
112 {
92 UNDO_LIST *release = rl_undo_list;
113 release = rl_undo_list;
93 rl_undo_list = rl_undo_list->next;
94
95 if (release->what == UNDO_DELETE)
96 free (release->text);
97
98 free (release);
99 }
100 rl_undo_list = (UNDO_LIST *)NULL;
114 rl_undo_list = rl_undo_list->next;
115
116 if (release->what == UNDO_DELETE)
117 free (release->text);
118
119 free (release);
120 }
121 rl_undo_list = (UNDO_LIST *)NULL;
122 replace_history_data (-1, (histdata_t *)orig_list, (histdata_t *)NULL);
101}
102
123}
124
125UNDO_LIST *
126_rl_copy_undo_entry (entry)
127 UNDO_LIST *entry;
128{
129 UNDO_LIST *new;
130
131 new = alloc_undo_entry (entry->what, entry->start, entry->end, (char *)NULL);
132 new->text = entry->text ? savestring (entry->text) : 0;
133 return new;
134}
135
136UNDO_LIST *
137_rl_copy_undo_list (head)
138 UNDO_LIST *head;
139{
140 UNDO_LIST *list, *new, *roving, *c;
141
142 list = head;
143 new = 0;
144 while (list)
145 {
146 c = _rl_copy_undo_entry (list);
147 if (new == 0)
148 roving = new = c;
149 else
150 {
151 roving->next = c;
152 roving = roving->next;
153 }
154 list = list->next;
155 }
156
157 roving->next = 0;
158 return new;
159}
160
103/* Undo the next thing in the list. Return 0 if there
104 is nothing to undo, or non-zero if there was. */
105int
106rl_do_undo ()
107{
108 UNDO_LIST *release;
109 int waiting_for_begin, start, end;
110

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156 break;
157 }
158
159 _rl_doing_an_undo = 0;
160 RL_UNSETSTATE(RL_STATE_UNDOING);
161
162 release = rl_undo_list;
163 rl_undo_list = rl_undo_list->next;
161/* Undo the next thing in the list. Return 0 if there
162 is nothing to undo, or non-zero if there was. */
163int
164rl_do_undo ()
165{
166 UNDO_LIST *release;
167 int waiting_for_begin, start, end;
168

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214 break;
215 }
216
217 _rl_doing_an_undo = 0;
218 RL_UNSETSTATE(RL_STATE_UNDOING);
219
220 release = rl_undo_list;
221 rl_undo_list = rl_undo_list->next;
222 replace_history_data (-1, (histdata_t *)release, (histdata_t *)rl_undo_list);
223
164 free (release);
165 }
166 while (waiting_for_begin);
167
168 return (1);
169}
170#undef TRANS
171

--- 97 unchanged lines hidden --- 		224 free (release);
225 }
226 while (waiting_for_begin);
227
228 return (1);
229}
230#undef TRANS
231

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