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comparison src/undo.c @ 632:b6632d553df3 v7.0182

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updated for version 7.0182
author vimboss
date Thu, 19 Jan 2006 22:16:24 +0000
parents 66080ac5dab7
children 1c586ee8dd45
comparison
equal deleted inserted replaced
631:68a196b7504d 632:b6632d553df3
50 /* See below: use malloc()/free() for memory management. */ 50 /* See below: use malloc()/free() for memory management. */
51 #define U_USE_MALLOC 1 51 #define U_USE_MALLOC 1
52 52
53 static u_entry_T *u_get_headentry __ARGS((void)); 53 static u_entry_T *u_get_headentry __ARGS((void));
54 static void u_getbot __ARGS((void)); 54 static void u_getbot __ARGS((void));
55 static int undo_allowed __ARGS((void));
55 static int u_savecommon __ARGS((linenr_T, linenr_T, linenr_T)); 56 static int u_savecommon __ARGS((linenr_T, linenr_T, linenr_T));
56 static void u_doit __ARGS((int count)); 57 static void u_doit __ARGS((int count));
57 static void u_undoredo __ARGS((void)); 58 static void u_undoredo __ARGS((void));
58 static void u_undo_end __ARGS((void)); 59 static void u_undo_end __ARGS((void));
59 static void u_freelist __ARGS((buf_T *buf, struct u_header *)); 60 static void u_freelist __ARGS((buf_T *buf, struct u_header *));
154 155
155 return (u_savecommon(lnum - 1, lnum + nlines, 156 return (u_savecommon(lnum - 1, lnum + nlines,
156 nlines == curbuf->b_ml.ml_line_count ? 2 : lnum)); 157 nlines == curbuf->b_ml.ml_line_count ? 2 : lnum));
157 } 158 }
158 159
160 /*
161 * Return TRUE when undo is allowed. Otherwise give an error message and
162 * return FALSE.
163 */
164 static int
165 undo_allowed()
166 {
167 /* Don't allow changes when 'modifiable' is off. */
168 if (!curbuf->b_p_ma)
169 {
170 EMSG(_(e_modifiable));
171 return FALSE;
172 }
173
174 #ifdef HAVE_SANDBOX
175 /* In the sandbox it's not allowed to change the text. */
176 if (sandbox != 0)
177 {
178 EMSG(_(e_sandbox));
179 return FALSE;
180 }
181 #endif
182
183 /* Don't allow changes in the buffer while editing the cmdline. The
184 * caller of getcmdline() may get confused. */
185 if (cmdline_busy)
186 {
187 EMSG(_(e_secure));
188 return FALSE;
189 }
190
191 return TRUE;
192 }
193
159 static int 194 static int
160 u_savecommon(top, bot, newbot) 195 u_savecommon(top, bot, newbot)
161 linenr_T top, bot; 196 linenr_T top, bot;
162 linenr_T newbot; 197 linenr_T newbot;
163 { 198 {
166 struct u_header *uhp; 201 struct u_header *uhp;
167 u_entry_T *uep; 202 u_entry_T *uep;
168 u_entry_T *prev_uep; 203 u_entry_T *prev_uep;
169 long size; 204 long size;
170 205
171 /* 206 /* When making changes is not allowed return FAIL. It's a crude way to
172 * Don't allow changes when 'modifiable' is off. Letting the 207 * make all change commands fail. */
173 * undo fail is a crude way to make all change commands fail. 208 if (!undo_allowed())
174 */
175 if (!curbuf->b_p_ma)
176 {
177 EMSG(_(e_modifiable));
178 return FAIL; 209 return FAIL;
179 }
180
181 #ifdef HAVE_SANDBOX
182 /*
183 * In the sandbox it's not allowed to change the text. Letting the
184 * undo fail is a crude way to make all change commands fail.
185 */
186 if (sandbox != 0)
187 {
188 EMSG(_(e_sandbox));
189 return FAIL;
190 }
191 #endif
192 210
193 #ifdef FEAT_NETBEANS_INTG 211 #ifdef FEAT_NETBEANS_INTG
194 /* 212 /*
195 * Netbeans defines areas that cannot be modified. Bail out here when 213 * Netbeans defines areas that cannot be modified. Bail out here when
196 * trying to change text in a guarded area. 214 * trying to change text in a guarded area.
482 */ 500 */
483 static void 501 static void
484 u_doit(count) 502 u_doit(count)
485 int count; 503 int count;
486 { 504 {
487 /* Don't allow changes when 'modifiable' is off. */ 505 if (!undo_allowed())
488 if (!curbuf->b_p_ma)
489 {
490 EMSG(_(e_modifiable));
491 return; 506 return;
492 }
493 #ifdef HAVE_SANDBOX
494 /* In the sandbox it's not allowed to change the text. */
495 if (sandbox != 0)
496 {
497 EMSG(_(e_sandbox));
498 return;
499 }
500 #endif
501 507
502 u_newcount = 0; 508 u_newcount = 0;
503 u_oldcount = 0; 509 u_oldcount = 0;
504 if (curbuf->b_ml.ml_flags & ML_EMPTY) 510 if (curbuf->b_ml.ml_flags & ML_EMPTY)
505 u_oldcount = -1; 511 u_oldcount = -1;