1 /*
2 * $Id: editbox.c,v 1.70 2018/06/19 22:57:01 tom Exp $
3 *
4 * editbox.c -- implements the edit box
5 *
6 * Copyright 2007-2016,2018 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 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this program; if not, write to
18 * Free Software Foundation, Inc.
19 * 51 Franklin St., Fifth Floor
20 * Boston, MA 02110, USA.
21 */
22
23 #include <dialog.h>
24 #include <dlg_keys.h>
25
26 #include <sys/stat.h>
27
28 #define sTEXT -1
29
30 static void
fail_list(void)31 fail_list(void)
32 {
33 dlg_exiterr("File too large");
34 }
35
36 static void
grow_list(char *** list,int * have,int want)37 grow_list(char ***list, int *have, int want)
38 {
39 if (want > *have) {
40 size_t last = (size_t) *have;
41 size_t need = (size_t) (want | 31) + 3;
42 *have = (int) need;
43 (*list) = dlg_realloc(char *, need, *list);
44 if ((*list) == 0) {
45 fail_list();
46 } else {
47 while (++last < need) {
48 (*list)[last] = 0;
49 }
50 }
51 }
52 }
53
54 static void
load_list(const char * file,char *** list,int * rows)55 load_list(const char *file, char ***list, int *rows)
56 {
57 FILE *fp;
58 char *blob = 0;
59 struct stat sb;
60 unsigned n, pass;
61 unsigned need;
62 size_t size;
63
64 *list = 0;
65 *rows = 0;
66
67 if (stat(file, &sb) < 0 ||
68 (sb.st_mode & S_IFMT) != S_IFREG)
69 dlg_exiterr("Not a file: %s", file);
70
71 size = (size_t) sb.st_size;
72 if ((blob = dlg_malloc(char, size + 2)) == 0) {
73 fail_list();
74 } else {
75 blob[size] = '\0';
76
77 if ((fp = fopen(file, "r")) == 0)
78 dlg_exiterr("Cannot open: %s", file);
79 size = fread(blob, sizeof(char), size, fp);
80 fclose(fp);
81
82 /*
83 * If the file is not empty, ensure that it ends with a newline.
84 */
85 if (size != 0 && blob[size - 1] != '\n') {
86 blob[++size - 1] = '\n';
87 blob[size] = '\0';
88 }
89
90 for (pass = 0; pass < 2; ++pass) {
91 int first = TRUE;
92 need = 0;
93 for (n = 0; n < size; ++n) {
94 if (first && pass) {
95 (*list)[need] = blob + n;
96 first = FALSE;
97 }
98 if (blob[n] == '\n') {
99 first = TRUE;
100 ++need;
101 if (pass)
102 blob[n] = '\0';
103 }
104 }
105 if (pass) {
106 if (need == 0) {
107 (*list)[0] = dlg_strclone("");
108 (*list)[1] = 0;
109 } else {
110 for (n = 0; n < need; ++n) {
111 (*list)[n] = dlg_strclone((*list)[n]);
112 }
113 (*list)[need] = 0;
114 }
115 } else {
116 grow_list(list, rows, (int) need + 1);
117 }
118 }
119 free(blob);
120 }
121 }
122
123 static void
free_list(char *** list,int * rows)124 free_list(char ***list, int *rows)
125 {
126 if (*list != 0) {
127 int n;
128 for (n = 0; n < (*rows); ++n) {
129 if ((*list)[n] != 0)
130 free((*list)[n]);
131 }
132 free(*list);
133 *list = 0;
134 }
135 *rows = 0;
136 }
137
138 /*
139 * Display a single row in the editing window:
140 * thisrow is the actual row number that's being displayed.
141 * show_row is the row number that's highlighted for edit.
142 * base_row is the first row number in the window
143 */
144 static bool
display_one(WINDOW * win,char * text,int thisrow,int show_row,int base_row,int chr_offset)145 display_one(WINDOW *win,
146 char *text,
147 int thisrow,
148 int show_row,
149 int base_row,
150 int chr_offset)
151 {
152 bool result;
153
154 if (text != 0) {
155 dlg_show_string(win,
156 text,
157 chr_offset,
158 ((thisrow == show_row)
159 ? form_active_text_attr
160 : form_text_attr),
161 thisrow - base_row,
162 0,
163 getmaxx(win),
164 FALSE,
165 FALSE);
166 result = TRUE;
167 } else {
168 result = FALSE;
169 }
170 return result;
171 }
172
173 static void
display_all(WINDOW * win,char ** list,int show_row,int firstrow,int lastrow,int chr_offset)174 display_all(WINDOW *win,
175 char **list,
176 int show_row,
177 int firstrow,
178 int lastrow,
179 int chr_offset)
180 {
181 int limit = getmaxy(win);
182 int row;
183
184 dlg_attr_clear(win, getmaxy(win), getmaxx(win), dialog_attr);
185 if (lastrow - firstrow >= limit)
186 lastrow = firstrow + limit;
187 for (row = firstrow; row < lastrow; ++row) {
188 if (!display_one(win, list[row],
189 row, show_row, firstrow,
190 (row == show_row) ? chr_offset : 0))
191 break;
192 }
193 }
194
195 static int
size_list(char ** list)196 size_list(char **list)
197 {
198 int result = 0;
199
200 if (list != 0) {
201 while (*list++ != 0) {
202 ++result;
203 }
204 }
205 return result;
206 }
207
208 static bool
scroll_to(int pagesize,int rows,int * base_row,int * this_row,int target)209 scroll_to(int pagesize, int rows, int *base_row, int *this_row, int target)
210 {
211 bool result = FALSE;
212
213 if (target < *base_row) {
214 if (target < 0) {
215 if (*base_row == 0 && *this_row == 0) {
216 beep();
217 } else {
218 *this_row = 0;
219 *base_row = 0;
220 result = TRUE;
221 }
222 } else {
223 *this_row = target;
224 *base_row = target;
225 result = TRUE;
226 }
227 } else if (target >= rows) {
228 if (*this_row < rows - 1) {
229 *this_row = rows - 1;
230 *base_row = rows - 1;
231 result = TRUE;
232 } else {
233 beep();
234 }
235 } else if (target >= *base_row + pagesize) {
236 *this_row = target;
237 *base_row = target;
238 result = TRUE;
239 } else {
240 *this_row = target;
241 result = FALSE;
242 }
243 if (pagesize < rows) {
244 if (*base_row + pagesize >= rows) {
245 *base_row = rows - pagesize;
246 }
247 } else {
248 *base_row = 0;
249 }
250 return result;
251 }
252
253 static int
col_to_chr_offset(const char * text,int col)254 col_to_chr_offset(const char *text, int col)
255 {
256 const int *cols = dlg_index_columns(text);
257 const int *indx = dlg_index_wchars(text);
258 bool found = FALSE;
259 int result = 0;
260 unsigned n;
261 unsigned len = (unsigned) dlg_count_wchars(text);
262
263 for (n = 0; n < len; ++n) {
264 if (cols[n] <= col && cols[n + 1] > col) {
265 result = indx[n];
266 found = TRUE;
267 break;
268 }
269 }
270 if (!found && len && cols[len] == col) {
271 result = indx[len];
272 }
273 return result;
274 }
275
276 #define SCROLL_TO(target) show_all = scroll_to(pagesize, listsize, &base_row, &thisrow, target)
277
278 #define PREV_ROW (*list)[thisrow - 1]
279 #define THIS_ROW (*list)[thisrow]
280 #define NEXT_ROW (*list)[thisrow + 1]
281
282 #define UPDATE_COL(input) col_offset = dlg_edit_offset(input, chr_offset, box_width)
283
284 static int
widest_line(char ** list)285 widest_line(char **list)
286 {
287 int result = MAX_LEN;
288 char *value;
289
290 if (list != 0) {
291 while ((value = *list++) != 0) {
292 int check = (int) strlen(value);
293 if (check > result)
294 result = check;
295 }
296 }
297 return result;
298 }
299
300 #define NAVIGATE_BINDINGS \
301 DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ), \
302 DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ), \
303 DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ), \
304 DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ), \
305 DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
306 DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
307 DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ), \
308 DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ), \
309 DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ), \
310 DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ), \
311 DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ), \
312 DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ), \
313 DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) )
314 /*
315 * Display a dialog box for editing a copy of a file
316 */
317 int
dlg_editbox(const char * title,char *** list,int * rows,int height,int width)318 dlg_editbox(const char *title,
319 char ***list,
320 int *rows,
321 int height,
322 int width)
323 {
324 /* *INDENT-OFF* */
325 static DLG_KEYS_BINDING binding[] = {
326 HELPKEY_BINDINGS,
327 ENTERKEY_BINDINGS,
328 NAVIGATE_BINDINGS,
329 TOGGLEKEY_BINDINGS,
330 END_KEYS_BINDING
331 };
332 static DLG_KEYS_BINDING binding2[] = {
333 INPUTSTR_BINDINGS,
334 HELPKEY_BINDINGS,
335 ENTERKEY_BINDINGS,
336 NAVIGATE_BINDINGS,
337 /* no TOGGLEKEY_BINDINGS, since that includes space... */
338 END_KEYS_BINDING
339 };
340 /* *INDENT-ON* */
341
342 #ifdef KEY_RESIZE
343 int old_height = height;
344 int old_width = width;
345 #endif
346 int x, y, box_y, box_x, box_height, box_width;
347 int show_buttons;
348 int thisrow, base_row, lastrow;
349 int goal_col = -1;
350 int col_offset = 0;
351 int chr_offset = 0;
352 int key, fkey, code;
353 int pagesize;
354 int listsize = size_list(*list);
355 int result = DLG_EXIT_UNKNOWN;
356 int state;
357 size_t max_len = (size_t) dlg_max_input(widest_line(*list));
358 char *input, *buffer;
359 bool show_all, show_one, was_mouse;
360 bool first_trace = TRUE;
361 WINDOW *dialog;
362 WINDOW *editing;
363 DIALOG_VARS save_vars;
364 const char **buttons = dlg_ok_labels();
365 int mincols = (3 * COLS / 4);
366
367 DLG_TRACE(("# editbox args:\n"));
368 DLG_TRACE2S("title", title);
369 /* FIXME dump the rows & list */
370 DLG_TRACE2N("height", height);
371 DLG_TRACE2N("width", width);
372
373 dlg_save_vars(&save_vars);
374 dialog_vars.separate_output = TRUE;
375
376 dlg_does_output();
377
378 buffer = dlg_malloc(char, max_len + 1);
379 assert_ptr(buffer, "dlg_editbox");
380
381 thisrow = base_row = lastrow = 0;
382
383 #ifdef KEY_RESIZE
384 retry:
385 #endif
386 show_buttons = TRUE;
387 state = dialog_vars.default_button >= 0 ? dlg_default_button() : sTEXT;
388 fkey = 0;
389
390 dlg_button_layout(buttons, &mincols);
391 dlg_auto_size(title, "", &height, &width, 3 * LINES / 4, mincols);
392 dlg_print_size(height, width);
393 dlg_ctl_size(height, width);
394
395 x = dlg_box_x_ordinate(width);
396 y = dlg_box_y_ordinate(height);
397
398 dialog = dlg_new_window(height, width, y, x);
399 dlg_register_window(dialog, "editbox", binding);
400 dlg_register_buttons(dialog, "editbox", buttons);
401
402 dlg_mouse_setbase(x, y);
403
404 dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
405 dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
406 dlg_draw_title(dialog, title);
407
408 dlg_attrset(dialog, dialog_attr);
409
410 /* Draw the editing field in a box */
411 box_y = MARGIN + 0;
412 box_x = MARGIN + 1;
413 box_width = width - 2 - (2 * MARGIN);
414 box_height = height - (4 * MARGIN);
415
416 dlg_draw_box(dialog,
417 box_y,
418 box_x,
419 box_height,
420 box_width,
421 border_attr, border2_attr);
422 dlg_mouse_mkbigregion(box_y + MARGIN,
423 box_x + MARGIN,
424 box_height - (2 * MARGIN),
425 box_width - (2 * MARGIN),
426 KEY_MAX, 1, 1, 3);
427 editing = dlg_sub_window(dialog,
428 box_height - (2 * MARGIN),
429 box_width - (2 * MARGIN),
430 getbegy(dialog) + box_y + 1,
431 getbegx(dialog) + box_x + 1);
432 dlg_register_window(editing, "editbox2", binding2);
433
434 show_all = TRUE;
435 show_one = FALSE;
436 pagesize = getmaxy(editing);
437
438 while (result == DLG_EXIT_UNKNOWN) {
439 int edit = 0;
440
441 if (show_all) {
442 display_all(editing, *list, thisrow, base_row, listsize, chr_offset);
443 display_one(editing, THIS_ROW,
444 thisrow, thisrow, base_row, chr_offset);
445 show_all = FALSE;
446 show_one = TRUE;
447 } else {
448 if (thisrow != lastrow) {
449 display_one(editing, (*list)[lastrow],
450 lastrow, thisrow, base_row, 0);
451 show_one = TRUE;
452 }
453 }
454 if (show_one) {
455 display_one(editing, THIS_ROW,
456 thisrow, thisrow, base_row, chr_offset);
457 getyx(editing, y, x);
458 dlg_draw_scrollbar(dialog,
459 base_row,
460 base_row,
461 base_row + pagesize,
462 listsize,
463 box_x,
464 box_x + getmaxx(editing),
465 box_y + 0,
466 box_y + getmaxy(editing) + 1,
467 border2_attr,
468 border_attr);
469 wmove(editing, y, x);
470 show_one = FALSE;
471 }
472 lastrow = thisrow;
473 input = THIS_ROW;
474
475 /*
476 * The last field drawn determines where the cursor is shown:
477 */
478 if (show_buttons) {
479 show_buttons = FALSE;
480 UPDATE_COL(input);
481 if (state != sTEXT) {
482 display_one(editing, input, thisrow,
483 -1, base_row, 0);
484 wrefresh(editing);
485 }
486 dlg_draw_buttons(dialog,
487 height - 2,
488 0,
489 buttons,
490 (state != sTEXT) ? state : 99,
491 FALSE,
492 width);
493 if (state == sTEXT) {
494 display_one(editing, input, thisrow,
495 thisrow, base_row, chr_offset);
496 }
497 }
498
499 if (first_trace) {
500 first_trace = FALSE;
501 dlg_trace_win(dialog);
502 }
503
504 key = dlg_mouse_wgetch((state == sTEXT) ? editing : dialog, &fkey);
505 if (key == ERR) {
506 result = DLG_EXIT_ERROR;
507 break;
508 } else if (key == ESC) {
509 result = DLG_EXIT_ESC;
510 break;
511 }
512 if (state != sTEXT) {
513 if (dlg_result_key(key, fkey, &result))
514 break;
515 }
516
517 was_mouse = (fkey && is_DLGK_MOUSE(key));
518 if (was_mouse)
519 key -= M_EVENT;
520
521 /*
522 * Handle mouse clicks first, since we want to know if this is a
523 * button, or something that dlg_edit_string() should handle.
524 */
525 if (fkey
526 && was_mouse
527 && (code = dlg_ok_buttoncode(key)) >= 0) {
528 result = code;
529 continue;
530 }
531
532 if (was_mouse
533 && (key >= KEY_MAX)) {
534 int wide = getmaxx(editing);
535 int cell = key - KEY_MAX;
536 int check = (cell / wide) + base_row;
537 if (check < listsize) {
538 thisrow = check;
539 col_offset = (cell % wide);
540 chr_offset = col_to_chr_offset(THIS_ROW, col_offset);
541 show_one = TRUE;
542 if (state != sTEXT) {
543 state = sTEXT;
544 show_buttons = TRUE;
545 }
546 } else {
547 beep();
548 }
549 continue;
550 } else if (was_mouse && key >= KEY_MIN) {
551 key = dlg_lookup_key(dialog, key, &fkey);
552 }
553
554 if (state == sTEXT) { /* editing box selected */
555 /*
556 * Intercept scrolling keys that dlg_edit_string() does not
557 * understand.
558 */
559 if (fkey) {
560 bool moved = TRUE;
561
562 switch (key) {
563 case DLGK_GRID_UP:
564 SCROLL_TO(thisrow - 1);
565 break;
566 case DLGK_GRID_DOWN:
567 SCROLL_TO(thisrow + 1);
568 break;
569 case DLGK_PAGE_FIRST:
570 SCROLL_TO(0);
571 break;
572 case DLGK_PAGE_LAST:
573 SCROLL_TO(listsize);
574 break;
575 case DLGK_PAGE_NEXT:
576 SCROLL_TO(base_row + pagesize);
577 break;
578 case DLGK_PAGE_PREV:
579 if (thisrow > base_row) {
580 SCROLL_TO(base_row);
581 } else {
582 SCROLL_TO(base_row - pagesize);
583 }
584 break;
585 case DLGK_DELETE_LEFT:
586 if (chr_offset == 0) {
587 if (thisrow == 0) {
588 beep();
589 } else {
590 size_t len = (strlen(THIS_ROW) +
591 strlen(PREV_ROW) + 1);
592 char *tmp = dlg_malloc(char, len);
593
594 assert_ptr(tmp, "dlg_editbox");
595
596 chr_offset = dlg_count_wchars(PREV_ROW);
597 UPDATE_COL(PREV_ROW);
598 goal_col = col_offset;
599
600 sprintf(tmp, "%s%s", PREV_ROW, THIS_ROW);
601 if (len > max_len)
602 tmp[max_len] = '\0';
603
604 free(PREV_ROW);
605 PREV_ROW = tmp;
606 for (y = thisrow; y < listsize; ++y) {
607 (*list)[y] = (*list)[y + 1];
608 }
609 --listsize;
610 --thisrow;
611 SCROLL_TO(thisrow);
612
613 show_all = TRUE;
614 }
615 } else {
616 /* dlg_edit_string() can handle this case */
617 moved = FALSE;
618 }
619 break;
620 default:
621 moved = FALSE;
622 break;
623 }
624 if (moved) {
625 if (thisrow != lastrow) {
626 if (goal_col < 0)
627 goal_col = col_offset;
628 chr_offset = col_to_chr_offset(THIS_ROW, goal_col);
629 } else {
630 UPDATE_COL(THIS_ROW);
631 }
632 continue;
633 }
634 }
635 strncpy(buffer, input, max_len - 1)[max_len - 1] = '\0';
636 edit = dlg_edit_string(buffer, &chr_offset, key, fkey, FALSE);
637
638 if (edit) {
639 goal_col = UPDATE_COL(input);
640 if (strcmp(input, buffer)) {
641 free(input);
642 THIS_ROW = dlg_strclone(buffer);
643 input = THIS_ROW;
644 }
645 display_one(editing, input, thisrow,
646 thisrow, base_row, chr_offset);
647 continue;
648 }
649 }
650
651 /* handle non-functionkeys */
652 if (!fkey && (code = dlg_char_to_button(key, buttons)) >= 0) {
653 dlg_del_window(dialog);
654 result = dlg_ok_buttoncode(code);
655 continue;
656 }
657
658 /* handle functionkeys */
659 if (fkey) {
660 switch (key) {
661 case DLGK_GRID_UP:
662 case DLGK_GRID_LEFT:
663 case DLGK_FIELD_PREV:
664 show_buttons = TRUE;
665 state = dlg_prev_ok_buttonindex(state, sTEXT);
666 break;
667 case DLGK_GRID_RIGHT:
668 case DLGK_GRID_DOWN:
669 case DLGK_FIELD_NEXT:
670 show_buttons = TRUE;
671 state = dlg_next_ok_buttonindex(state, sTEXT);
672 break;
673 case DLGK_ENTER:
674 if (state == sTEXT) {
675 const int *indx = dlg_index_wchars(THIS_ROW);
676 int split = indx[chr_offset];
677 char *tmp = dlg_strclone(THIS_ROW + split);
678
679 assert_ptr(tmp, "dlg_editbox");
680 grow_list(list, rows, listsize + 1);
681 ++listsize;
682 for (y = listsize; y > thisrow; --y) {
683 (*list)[y] = (*list)[y - 1];
684 }
685 THIS_ROW[split] = '\0';
686 ++thisrow;
687 chr_offset = 0;
688 col_offset = 0;
689 THIS_ROW = tmp;
690 SCROLL_TO(thisrow);
691 show_all = TRUE;
692 } else {
693 result = dlg_ok_buttoncode(state);
694 }
695 break;
696 #ifdef KEY_RESIZE
697 case KEY_RESIZE:
698 dlg_will_resize(dialog);
699 /* reset data */
700 height = old_height;
701 width = old_width;
702 dlg_clear();
703 dlg_unregister_window(editing);
704 dlg_del_window(editing);
705 dlg_del_window(dialog);
706 dlg_mouse_free_regions();
707 /* repaint */
708 goto retry;
709 #endif
710 case DLGK_TOGGLE:
711 if (state != sTEXT) {
712 result = dlg_ok_buttoncode(state);
713 } else {
714 beep();
715 }
716 break;
717 default:
718 beep();
719 break;
720 }
721 } else {
722 beep();
723 }
724 }
725
726 dlg_unregister_window(editing);
727 dlg_del_window(editing);
728 dlg_del_window(dialog);
729 dlg_mouse_free_regions();
730
731 /*
732 * The caller's copy of the (*list)[] array has been updated, but for
733 * consistency with the other widgets, we put the "real" result in
734 * the output buffer.
735 */
736 if (result == DLG_EXIT_OK) {
737 int n;
738 for (n = 0; n < listsize; ++n) {
739 dlg_add_result((*list)[n]);
740 dlg_add_separator();
741 }
742 dlg_add_last_key(-1);
743 }
744 free(buffer);
745 dlg_restore_vars(&save_vars);
746 return result;
747 }
748
749 int
dialog_editbox(const char * title,const char * file,int height,int width)750 dialog_editbox(const char *title, const char *file, int height, int width)
751 {
752 int result;
753 char **list;
754 int rows;
755
756 load_list(file, &list, &rows);
757 result = dlg_editbox(title, &list, &rows, height, width);
758 free_list(&list, &rows);
759 return result;
760 }
761