1 /*
2 * $Id: editbox.c,v 1.80 2020/11/23 00:27:21 tom Exp $
3 *
4 * editbox.c -- implements the edit box
5 *
6 * Copyright 2007-2019,2020 Thomas E. Dickey
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License, version 2.1
10 * as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this program; if not, write to
19 * Free Software Foundation, Inc.
20 * 51 Franklin St., Fifth Floor
21 * Boston, MA 02110, USA.
22 */
23
24 #include <dialog.h>
25 #include <dlg_keys.h>
26
27 #include <sys/stat.h>
28
29 #define sTEXT -1
30
31 static void
fail_list(void)32 fail_list(void)
33 {
34 dlg_exiterr("File too large");
35 }
36
37 static void
grow_list(char *** list,int * have,int want)38 grow_list(char ***list, int *have, int want)
39 {
40 if (want > *have) {
41 size_t last = (size_t) *have;
42 size_t need = (size_t) (want | 31) + 3;
43 *have = (int) need;
44 (*list) = dlg_realloc(char *, need, *list);
45 if ((*list) == 0) {
46 fail_list();
47 } else {
48 while (++last < need) {
49 (*list)[last] = 0;
50 }
51 }
52 }
53 }
54
55 static void
load_list(const char * file,char *** list,int * rows)56 load_list(const char *file, char ***list, int *rows)
57 {
58 char *blob = 0;
59 struct stat sb;
60 size_t size;
61
62 *list = 0;
63 *rows = 0;
64
65 if (stat(file, &sb) < 0 ||
66 (sb.st_mode & S_IFMT) != S_IFREG)
67 dlg_exiterr("Not a file: %s", file);
68
69 size = (size_t) sb.st_size;
70 if ((blob = dlg_malloc(char, size + 2)) == 0) {
71 fail_list();
72 } else {
73 FILE *fp;
74 unsigned n, pass;
75
76 blob[size] = '\0';
77
78 if ((fp = fopen(file, "r")) == 0)
79 dlg_exiterr("Cannot open: %s", file);
80 size = fread(blob, sizeof(char), size, fp);
81 fclose(fp);
82
83 /*
84 * If the file is not empty, ensure that it ends with a newline.
85 */
86 if (size != 0 && blob[size - 1] != '\n') {
87 blob[++size - 1] = '\n';
88 blob[size] = '\0';
89 }
90
91 for (pass = 0; pass < 2; ++pass) {
92 int first = TRUE;
93 unsigned need = 0;
94
95 for (n = 0; n < size; ++n) {
96 if (first && pass) {
97 (*list)[need] = blob + n;
98 first = FALSE;
99 }
100 if (blob[n] == '\n') {
101 first = TRUE;
102 ++need;
103 if (pass)
104 blob[n] = '\0';
105 }
106 }
107 if (pass) {
108 if (need == 0) {
109 (*list)[0] = dlg_strclone("");
110 (*list)[1] = 0;
111 } else {
112 for (n = 0; n < need; ++n) {
113 (*list)[n] = dlg_strclone((*list)[n]);
114 }
115 (*list)[need] = 0;
116 }
117 } else {
118 grow_list(list, rows, (int) need + 1);
119 }
120 }
121 free(blob);
122 }
123 }
124
125 static void
free_list(char *** list,int * rows)126 free_list(char ***list, int *rows)
127 {
128 if (*list != 0) {
129 int n;
130 for (n = 0; n < (*rows); ++n) {
131 if ((*list)[n] != 0)
132 free((*list)[n]);
133 }
134 free(*list);
135 *list = 0;
136 }
137 *rows = 0;
138 }
139
140 /*
141 * Display a single row in the editing window:
142 * thisrow is the actual row number that's being displayed.
143 * show_row is the row number that's highlighted for edit.
144 * base_row is the first row number in the window
145 */
146 static bool
display_one(WINDOW * win,char * text,int thisrow,int show_row,int base_row,int chr_offset)147 display_one(WINDOW *win,
148 char *text,
149 int thisrow,
150 int show_row,
151 int base_row,
152 int chr_offset)
153 {
154 bool result;
155
156 if (text != 0) {
157 dlg_show_string(win,
158 text,
159 chr_offset,
160 ((thisrow == show_row)
161 ? form_active_text_attr
162 : form_text_attr),
163 thisrow - base_row,
164 0,
165 getmaxx(win),
166 FALSE,
167 FALSE);
168 result = TRUE;
169 } else {
170 result = FALSE;
171 }
172 return result;
173 }
174
175 static void
display_all(WINDOW * win,char ** list,int show_row,int firstrow,int lastrow,int chr_offset)176 display_all(WINDOW *win,
177 char **list,
178 int show_row,
179 int firstrow,
180 int lastrow,
181 int chr_offset)
182 {
183 int limit = getmaxy(win);
184 int row;
185
186 dlg_attr_clear(win, getmaxy(win), getmaxx(win), dialog_attr);
187 if (lastrow - firstrow >= limit)
188 lastrow = firstrow + limit;
189 for (row = firstrow; row < lastrow; ++row) {
190 if (!display_one(win, list[row],
191 row, show_row, firstrow,
192 (row == show_row) ? chr_offset : 0))
193 break;
194 }
195 }
196
197 static int
size_list(char ** list)198 size_list(char **list)
199 {
200 int result = 0;
201
202 if (list != 0) {
203 while (*list++ != 0) {
204 ++result;
205 }
206 }
207 return result;
208 }
209
210 static bool
scroll_to(int pagesize,int rows,int * base_row,int * this_row,int target)211 scroll_to(int pagesize, int rows, int *base_row, int *this_row, int target)
212 {
213 bool result = FALSE;
214
215 if (target < *base_row) {
216 if (target < 0) {
217 if (*base_row == 0 && *this_row == 0) {
218 beep();
219 } else {
220 *this_row = 0;
221 *base_row = 0;
222 result = TRUE;
223 }
224 } else {
225 *this_row = target;
226 *base_row = target;
227 result = TRUE;
228 }
229 } else if (target >= rows) {
230 if (*this_row < rows - 1) {
231 *this_row = rows - 1;
232 *base_row = rows - 1;
233 result = TRUE;
234 } else {
235 beep();
236 }
237 } else if (target >= *base_row + pagesize) {
238 *this_row = target;
239 *base_row = target;
240 result = TRUE;
241 } else {
242 *this_row = target;
243 result = FALSE;
244 }
245 if (pagesize < rows) {
246 if (*base_row + pagesize >= rows) {
247 *base_row = rows - pagesize;
248 }
249 } else {
250 *base_row = 0;
251 }
252 return result;
253 }
254
255 static int
col_to_chr_offset(const char * text,int col)256 col_to_chr_offset(const char *text, int col)
257 {
258 const int *cols = dlg_index_columns(text);
259 const int *indx = dlg_index_wchars(text);
260 bool found = FALSE;
261 int result = 0;
262 unsigned n;
263 unsigned len = (unsigned) dlg_count_wchars(text);
264
265 for (n = 0; n < len; ++n) {
266 if (cols[n] <= col && cols[n + 1] > col) {
267 result = indx[n];
268 found = TRUE;
269 break;
270 }
271 }
272 if (!found && len && cols[len] == col) {
273 result = indx[len];
274 }
275 return result;
276 }
277
278 #define Scroll_To(target) scroll_to(pagesize, listsize, &base_row, &thisrow, target)
279 #define SCROLL_TO(target) show_all = Scroll_To(target)
280
281 #define PREV_ROW (*list)[thisrow - 1]
282 #define THIS_ROW (*list)[thisrow]
283 #define NEXT_ROW (*list)[thisrow + 1]
284
285 #define UPDATE_COL(input) col_offset = dlg_edit_offset(input, chr_offset, box_width)
286
287 static int
widest_line(char ** list)288 widest_line(char **list)
289 {
290 int result = MAX_LEN;
291
292 if (list != 0) {
293 char *value;
294
295 while ((value = *list++) != 0) {
296 int check = (int) strlen(value);
297 if (check > result)
298 result = check;
299 }
300 }
301 return result;
302 }
303
304 #define NAVIGATE_BINDINGS \
305 DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ), \
306 DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ), \
307 DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ), \
308 DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ), \
309 DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
310 DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
311 DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ), \
312 DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ), \
313 DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ), \
314 DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ), \
315 DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ), \
316 DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ), \
317 DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) )
318 /*
319 * Display a dialog box for editing a copy of a file
320 */
321 int
dlg_editbox(const char * title,char *** list,int * rows,int height,int width)322 dlg_editbox(const char *title,
323 char ***list,
324 int *rows,
325 int height,
326 int width)
327 {
328 /* *INDENT-OFF* */
329 static DLG_KEYS_BINDING binding[] = {
330 HELPKEY_BINDINGS,
331 ENTERKEY_BINDINGS,
332 NAVIGATE_BINDINGS,
333 TOGGLEKEY_BINDINGS,
334 END_KEYS_BINDING
335 };
336 static DLG_KEYS_BINDING binding2[] = {
337 INPUTSTR_BINDINGS,
338 HELPKEY_BINDINGS,
339 ENTERKEY_BINDINGS,
340 NAVIGATE_BINDINGS,
341 /* no TOGGLEKEY_BINDINGS, since that includes space... */
342 END_KEYS_BINDING
343 };
344 /* *INDENT-ON* */
345
346 #ifdef KEY_RESIZE
347 int old_height = height;
348 int old_width = width;
349 #endif
350 int x, y, box_y, box_x, box_height, box_width;
351 int show_buttons;
352 int thisrow, base_row, lastrow;
353 int goal_col = -1;
354 int col_offset = 0;
355 int chr_offset = 0;
356 int key, fkey, code;
357 int pagesize;
358 int listsize = size_list(*list);
359 int result = DLG_EXIT_UNKNOWN;
360 int state;
361 size_t max_len = (size_t) dlg_max_input(widest_line(*list));
362 char *buffer;
363 bool show_all, show_one;
364 bool first_trace = TRUE;
365 WINDOW *dialog;
366 WINDOW *editing;
367 DIALOG_VARS save_vars;
368 const char **buttons = dlg_ok_labels();
369 int mincols = (3 * COLS / 4);
370
371 DLG_TRACE(("# editbox args:\n"));
372 DLG_TRACE2S("title", title);
373 /* FIXME dump the rows & list */
374 DLG_TRACE2N("height", height);
375 DLG_TRACE2N("width", width);
376
377 dlg_save_vars(&save_vars);
378 dialog_vars.separate_output = TRUE;
379
380 dlg_does_output();
381
382 buffer = dlg_malloc(char, max_len + 1);
383 assert_ptr(buffer, "dlg_editbox");
384
385 thisrow = base_row = lastrow = 0;
386
387 #ifdef KEY_RESIZE
388 retry:
389 #endif
390 show_buttons = TRUE;
391 state = dialog_vars.default_button >= 0 ? dlg_default_button() : sTEXT;
392 fkey = 0;
393
394 dlg_button_layout(buttons, &mincols);
395 dlg_auto_size(title, "", &height, &width, 3 * LINES / 4, mincols);
396 dlg_print_size(height, width);
397 dlg_ctl_size(height, width);
398
399 x = dlg_box_x_ordinate(width);
400 y = dlg_box_y_ordinate(height);
401
402 dialog = dlg_new_window(height, width, y, x);
403 dlg_register_window(dialog, "editbox", binding);
404 dlg_register_buttons(dialog, "editbox", buttons);
405
406 dlg_mouse_setbase(x, y);
407
408 dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
409 dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
410 dlg_draw_title(dialog, title);
411
412 dlg_attrset(dialog, dialog_attr);
413
414 /* Draw the editing field in a box */
415 box_y = MARGIN + 0;
416 box_x = MARGIN + 1;
417 box_width = width - 2 - (2 * MARGIN);
418 box_height = height - (4 * MARGIN);
419
420 dlg_draw_box(dialog,
421 box_y,
422 box_x,
423 box_height,
424 box_width,
425 border_attr, border2_attr);
426 dlg_mouse_mkbigregion(box_y + MARGIN,
427 box_x + MARGIN,
428 box_height - (2 * MARGIN),
429 box_width - (2 * MARGIN),
430 KEY_MAX, 1, 1, 3);
431 editing = dlg_sub_window(dialog,
432 box_height - (2 * MARGIN),
433 box_width - (2 * MARGIN),
434 getbegy(dialog) + box_y + 1,
435 getbegx(dialog) + box_x + 1);
436 dlg_register_window(editing, "editbox2", binding2);
437
438 show_all = TRUE;
439 show_one = FALSE;
440 pagesize = getmaxy(editing);
441
442 while (result == DLG_EXIT_UNKNOWN) {
443 bool was_mouse;
444 char *input;
445
446 if (show_all) {
447 display_all(editing, *list, thisrow, base_row, listsize, chr_offset);
448 display_one(editing, THIS_ROW,
449 thisrow, thisrow, base_row, chr_offset);
450 show_all = FALSE;
451 show_one = TRUE;
452 } else {
453 if (thisrow != lastrow) {
454 display_one(editing, (*list)[lastrow],
455 lastrow, thisrow, base_row, 0);
456 show_one = TRUE;
457 }
458 }
459 if (show_one) {
460 display_one(editing, THIS_ROW,
461 thisrow, thisrow, base_row, chr_offset);
462 getyx(editing, y, x);
463 dlg_draw_scrollbar(dialog,
464 base_row,
465 base_row,
466 base_row + pagesize,
467 listsize,
468 box_x,
469 box_x + getmaxx(editing),
470 box_y + 0,
471 box_y + getmaxy(editing) + 1,
472 border2_attr,
473 border_attr);
474 wmove(editing, y, x);
475 show_one = FALSE;
476 }
477 lastrow = thisrow;
478 input = THIS_ROW;
479
480 /*
481 * The last field drawn determines where the cursor is shown:
482 */
483 if (show_buttons) {
484 show_buttons = FALSE;
485 UPDATE_COL(input);
486 if (state != sTEXT) {
487 display_one(editing, input, thisrow,
488 -1, base_row, 0);
489 wrefresh(editing);
490 }
491 dlg_draw_buttons(dialog,
492 height - 2,
493 0,
494 buttons,
495 (state != sTEXT) ? state : 99,
496 FALSE,
497 width);
498 if (state == sTEXT) {
499 display_one(editing, input, thisrow,
500 thisrow, base_row, chr_offset);
501 }
502 }
503
504 if (first_trace) {
505 first_trace = FALSE;
506 dlg_trace_win(dialog);
507 }
508
509 key = dlg_mouse_wgetch((state == sTEXT) ? editing : dialog, &fkey);
510 if (key == ERR) {
511 result = DLG_EXIT_ERROR;
512 break;
513 } else if (key == ESC) {
514 result = DLG_EXIT_ESC;
515 break;
516 }
517 if (state != sTEXT) {
518 if (dlg_result_key(key, fkey, &result)) {
519 if (!dlg_button_key(result, &code, &key, &fkey))
520 break;
521 }
522 }
523
524 was_mouse = (fkey && is_DLGK_MOUSE(key));
525 if (was_mouse)
526 key -= M_EVENT;
527
528 /*
529 * Handle mouse clicks first, since we want to know if this is a
530 * button, or something that dlg_edit_string() should handle.
531 */
532 if (fkey
533 && was_mouse
534 && (code = dlg_ok_buttoncode(key)) >= 0) {
535 result = code;
536 continue;
537 }
538
539 if (was_mouse
540 && (key >= KEY_MAX)) {
541 int wide = getmaxx(editing);
542 int cell = key - KEY_MAX;
543 int check = (cell / wide) + base_row;
544 if (check < listsize) {
545 thisrow = check;
546 col_offset = (cell % wide);
547 chr_offset = col_to_chr_offset(THIS_ROW, col_offset);
548 show_one = TRUE;
549 if (state != sTEXT) {
550 state = sTEXT;
551 show_buttons = TRUE;
552 }
553 } else {
554 beep();
555 }
556 continue;
557 } else if (was_mouse && key >= KEY_MIN) {
558 key = dlg_lookup_key(dialog, key, &fkey);
559 }
560
561 if (state == sTEXT) { /* editing box selected */
562 int edit = 0;
563
564 /*
565 * Intercept scrolling keys that dlg_edit_string() does not
566 * understand.
567 */
568 if (fkey) {
569 bool moved = TRUE;
570
571 switch (key) {
572 case DLGK_GRID_UP:
573 SCROLL_TO(thisrow - 1);
574 break;
575 case DLGK_GRID_DOWN:
576 SCROLL_TO(thisrow + 1);
577 break;
578 case DLGK_PAGE_FIRST:
579 SCROLL_TO(0);
580 break;
581 case DLGK_PAGE_LAST:
582 SCROLL_TO(listsize);
583 break;
584 case DLGK_PAGE_NEXT:
585 SCROLL_TO(base_row + pagesize);
586 break;
587 case DLGK_PAGE_PREV:
588 if (thisrow > base_row) {
589 SCROLL_TO(base_row);
590 } else {
591 SCROLL_TO(base_row - pagesize);
592 }
593 break;
594 case DLGK_DELETE_LEFT:
595 if (chr_offset == 0) {
596 if (thisrow == 0) {
597 beep();
598 } else {
599 size_t len = (strlen(THIS_ROW) +
600 strlen(PREV_ROW) + 1);
601 char *tmp = dlg_malloc(char, len);
602
603 assert_ptr(tmp, "dlg_editbox");
604
605 chr_offset = dlg_count_wchars(PREV_ROW);
606 UPDATE_COL(PREV_ROW);
607 goal_col = col_offset;
608
609 sprintf(tmp, "%s%s", PREV_ROW, THIS_ROW);
610 if (len > max_len)
611 tmp[max_len] = '\0';
612
613 free(PREV_ROW);
614 PREV_ROW = tmp;
615 for (y = thisrow; y < listsize; ++y) {
616 (*list)[y] = (*list)[y + 1];
617 }
618 --listsize;
619 --thisrow;
620 (void) Scroll_To(thisrow);
621
622 show_all = TRUE;
623 }
624 } else {
625 /* dlg_edit_string() can handle this case */
626 moved = FALSE;
627 }
628 break;
629 default:
630 moved = FALSE;
631 break;
632 }
633 if (moved) {
634 if (thisrow != lastrow) {
635 if (goal_col < 0)
636 goal_col = col_offset;
637 chr_offset = col_to_chr_offset(THIS_ROW, goal_col);
638 } else {
639 UPDATE_COL(THIS_ROW);
640 }
641 continue;
642 }
643 }
644 strncpy(buffer, input, max_len - 1)[max_len - 1] = '\0';
645 edit = dlg_edit_string(buffer, &chr_offset, key, fkey, FALSE);
646
647 if (edit) {
648 goal_col = UPDATE_COL(input);
649 if (strcmp(input, buffer)) {
650 free(input);
651 THIS_ROW = dlg_strclone(buffer);
652 input = THIS_ROW;
653 }
654 display_one(editing, input, thisrow,
655 thisrow, base_row, chr_offset);
656 continue;
657 }
658 }
659
660 /* handle non-functionkeys */
661 if (!fkey && (code = dlg_char_to_button(key, buttons)) >= 0) {
662 dlg_del_window(dialog);
663 result = dlg_ok_buttoncode(code);
664 continue;
665 }
666
667 /* handle functionkeys */
668 if (fkey) {
669 switch (key) {
670 case DLGK_GRID_UP:
671 case DLGK_GRID_LEFT:
672 case DLGK_FIELD_PREV:
673 show_buttons = TRUE;
674 state = dlg_prev_ok_buttonindex(state, sTEXT);
675 break;
676 case DLGK_GRID_RIGHT:
677 case DLGK_GRID_DOWN:
678 case DLGK_FIELD_NEXT:
679 show_buttons = TRUE;
680 state = dlg_next_ok_buttonindex(state, sTEXT);
681 break;
682 case DLGK_ENTER:
683 if (state == sTEXT) {
684 const int *indx = dlg_index_wchars(THIS_ROW);
685 int split = indx[chr_offset];
686 char *tmp = dlg_strclone(THIS_ROW + split);
687
688 assert_ptr(tmp, "dlg_editbox");
689 grow_list(list, rows, listsize + 1);
690 ++listsize;
691 for (y = listsize; y > thisrow; --y) {
692 (*list)[y] = (*list)[y - 1];
693 }
694 THIS_ROW[split] = '\0';
695 ++thisrow;
696 chr_offset = 0;
697 col_offset = 0;
698 THIS_ROW = tmp;
699 (void) Scroll_To(thisrow);
700 show_all = TRUE;
701 } else {
702 result = dlg_enter_buttoncode(state);
703 }
704 break;
705 case DLGK_LEAVE:
706 if (state >= 0)
707 result = dlg_ok_buttoncode(state);
708 break;
709 #ifdef KEY_RESIZE
710 case KEY_RESIZE:
711 dlg_will_resize(dialog);
712 /* reset data */
713 height = old_height;
714 width = old_width;
715 /* repaint */
716 dlg_del_window(editing);
717 dlg_unregister_window(editing);
718 _dlg_resize_cleanup(dialog);
719 goto retry;
720 #endif
721 case DLGK_TOGGLE:
722 if (state != sTEXT) {
723 result = dlg_ok_buttoncode(state);
724 } else {
725 beep();
726 }
727 break;
728 default:
729 beep();
730 break;
731 }
732 } else if (key > 0) {
733 beep();
734 }
735 }
736
737 dlg_unregister_window(editing);
738 dlg_del_window(editing);
739 dlg_del_window(dialog);
740 dlg_mouse_free_regions();
741
742 /*
743 * The caller's copy of the (*list)[] array has been updated, but for
744 * consistency with the other widgets, we put the "real" result in
745 * the output buffer.
746 */
747 if (result == DLG_EXIT_OK) {
748 int n;
749 for (n = 0; n < listsize; ++n) {
750 dlg_add_result((*list)[n]);
751 dlg_add_separator();
752 }
753 dlg_add_last_key(-1);
754 }
755 free(buffer);
756 dlg_restore_vars(&save_vars);
757 return result;
758 }
759
760 int
dialog_editbox(const char * title,const char * file,int height,int width)761 dialog_editbox(const char *title, const char *file, int height, int width)
762 {
763 int result;
764 char **list;
765 int rows;
766
767 load_list(file, &list, &rows);
768 result = dlg_editbox(title, &list, &rows, height, width);
769 free_list(&list, &rows);
770 return result;
771 }
772