1 /*
2 * $Id: editbox.c,v 1.62 2013/03/17 15:03:41 tom Exp $
3 *
4 * editbox.c -- implements the edit box
5 *
6 * Copyright 2007-2012,2013 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 + 1)) == 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 for (pass = 0; pass < 2; ++pass) {
83 int first = TRUE;
84 need = 0;
85 for (n = 0; n < size; ++n) {
86 if (first && pass) {
87 (*list)[need] = blob + n;
88 first = FALSE;
89 }
90 if (blob[n] == '\n') {
91 first = TRUE;
92 ++need;
93 if (pass)
94 blob[n] = '\0';
95 }
96 }
97 if (pass) {
98 if (need == 0) {
99 (*list)[0] = dlg_strclone("");
100 (*list)[1] = 0;
101 } else {
102 for (n = 0; n < need; ++n) {
103 (*list)[n] = dlg_strclone((*list)[n]);
104 }
105 (*list)[need] = 0;
106 }
107 } else {
108 grow_list(list, rows, (int) need + 1);
109 }
110 }
111 free(blob);
112 }
113 }
114
115 static void
free_list(char *** list,int * rows)116 free_list(char ***list, int *rows)
117 {
118 if (*list != 0) {
119 int n;
120 for (n = 0; n < (*rows); ++n) {
121 if ((*list)[n] != 0)
122 free((*list)[n]);
123 }
124 free(*list);
125 *list = 0;
126 }
127 *rows = 0;
128 }
129
130 /*
131 * Display a single row in the editing window:
132 * thisrow is the actual row number that's being displayed.
133 * show_row is the row number that's highlighted for edit.
134 * base_row is the first row number in the window
135 */
136 static bool
display_one(WINDOW * win,char * text,int thisrow,int show_row,int base_row,int chr_offset)137 display_one(WINDOW *win,
138 char *text,
139 int thisrow,
140 int show_row,
141 int base_row,
142 int chr_offset)
143 {
144 bool result;
145
146 if (text != 0) {
147 dlg_show_string(win,
148 text,
149 chr_offset,
150 ((thisrow == show_row)
151 ? form_active_text_attr
152 : form_text_attr),
153 thisrow - base_row,
154 0,
155 getmaxx(win),
156 FALSE,
157 FALSE);
158 result = TRUE;
159 } else {
160 result = FALSE;
161 }
162 return result;
163 }
164
165 static void
display_all(WINDOW * win,char ** list,int show_row,int firstrow,int lastrow,int chr_offset)166 display_all(WINDOW *win,
167 char **list,
168 int show_row,
169 int firstrow,
170 int lastrow,
171 int chr_offset)
172 {
173 int limit = getmaxy(win);
174 int row;
175
176 dlg_attr_clear(win, getmaxy(win), getmaxx(win), dialog_attr);
177 if (lastrow - firstrow >= limit)
178 lastrow = firstrow + limit;
179 for (row = firstrow; row < lastrow; ++row) {
180 if (!display_one(win, list[row],
181 row, show_row, firstrow,
182 (row == show_row) ? chr_offset : 0))
183 break;
184 }
185 }
186
187 static int
size_list(char ** list)188 size_list(char **list)
189 {
190 int result = 0;
191
192 if (list != 0) {
193 while (*list++ != 0) {
194 ++result;
195 }
196 }
197 return result;
198 }
199
200 static bool
scroll_to(int pagesize,int rows,int * base_row,int * this_row,int target)201 scroll_to(int pagesize, int rows, int *base_row, int *this_row, int target)
202 {
203 bool result = FALSE;
204
205 if (target < *base_row) {
206 if (target < 0) {
207 if (*base_row == 0 && *this_row == 0) {
208 beep();
209 } else {
210 *this_row = 0;
211 *base_row = 0;
212 result = TRUE;
213 }
214 } else {
215 *this_row = target;
216 *base_row = target;
217 result = TRUE;
218 }
219 } else if (target >= rows) {
220 if (*this_row < rows - 1) {
221 *this_row = rows - 1;
222 *base_row = rows - 1;
223 result = TRUE;
224 } else {
225 beep();
226 }
227 } else if (target >= *base_row + pagesize) {
228 *this_row = target;
229 *base_row = target;
230 result = TRUE;
231 } else {
232 *this_row = target;
233 result = FALSE;
234 }
235 if (pagesize < rows) {
236 if (*base_row + pagesize >= rows) {
237 *base_row = rows - pagesize;
238 }
239 } else {
240 *base_row = 0;
241 }
242 return result;
243 }
244
245 static int
col_to_chr_offset(const char * text,int col)246 col_to_chr_offset(const char *text, int col)
247 {
248 const int *cols = dlg_index_columns(text);
249 const int *indx = dlg_index_wchars(text);
250 bool found = FALSE;
251 int result = 0;
252 unsigned n;
253 unsigned len = (unsigned) dlg_count_wchars(text);
254
255 for (n = 0; n < len; ++n) {
256 if (cols[n] <= col && cols[n + 1] > col) {
257 result = indx[n];
258 found = TRUE;
259 break;
260 }
261 }
262 if (!found && len && cols[len] == col) {
263 result = indx[len];
264 }
265 return result;
266 }
267
268 #define SCROLL_TO(target) show_all = scroll_to(pagesize, listsize, &base_row, &thisrow, target)
269
270 #define PREV_ROW (*list)[thisrow - 1]
271 #define THIS_ROW (*list)[thisrow]
272 #define NEXT_ROW (*list)[thisrow + 1]
273
274 #define UPDATE_COL(input) col_offset = dlg_edit_offset(input, chr_offset, box_width)
275
276 static int
widest_line(char ** list)277 widest_line(char **list)
278 {
279 int result = MAX_LEN;
280 char *value;
281
282 if (list != 0) {
283 while ((value = *list++) != 0) {
284 int check = (int) strlen(value);
285 if (check > result)
286 result = check;
287 }
288 }
289 return result;
290 }
291
292 #define NAVIGATE_BINDINGS \
293 DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ), \
294 DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ), \
295 DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ), \
296 DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ), \
297 DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
298 DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
299 DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ), \
300 DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ), \
301 DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ), \
302 DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ), \
303 DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ), \
304 DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ), \
305 DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) )
306 /*
307 * Display a dialog box for editing a copy of a file
308 */
309 int
dlg_editbox(const char * title,char *** list,int * rows,int height,int width)310 dlg_editbox(const char *title,
311 char ***list,
312 int *rows,
313 int height,
314 int width)
315 {
316 /* *INDENT-OFF* */
317 static DLG_KEYS_BINDING binding[] = {
318 HELPKEY_BINDINGS,
319 ENTERKEY_BINDINGS,
320 NAVIGATE_BINDINGS,
321 END_KEYS_BINDING
322 };
323 static DLG_KEYS_BINDING binding2[] = {
324 INPUTSTR_BINDINGS,
325 HELPKEY_BINDINGS,
326 ENTERKEY_BINDINGS,
327 NAVIGATE_BINDINGS,
328 END_KEYS_BINDING
329 };
330 /* *INDENT-ON* */
331
332 #ifdef KEY_RESIZE
333 int old_height = height;
334 int old_width = width;
335 #endif
336 int x, y, box_y, box_x, box_height, box_width;
337 int show_buttons;
338 int thisrow, base_row, lastrow;
339 int goal_col = -1;
340 int col_offset = 0;
341 int chr_offset = 0;
342 int key, fkey, code;
343 int pagesize;
344 int listsize = size_list(*list);
345 int result = DLG_EXIT_UNKNOWN;
346 int state;
347 size_t max_len = (size_t) dlg_max_input(widest_line(*list));
348 char *input, *buffer;
349 bool show_all, show_one, was_mouse;
350 bool first_trace = TRUE;
351 WINDOW *dialog;
352 WINDOW *editing;
353 DIALOG_VARS save_vars;
354 const char **buttons = dlg_ok_labels();
355 int mincols = (3 * COLS / 4);
356
357 dlg_save_vars(&save_vars);
358 dialog_vars.separate_output = TRUE;
359
360 dlg_does_output();
361
362 buffer = dlg_malloc(char, max_len + 1);
363 assert_ptr(buffer, "dlg_editbox");
364
365 thisrow = base_row = lastrow = 0;
366
367 #ifdef KEY_RESIZE
368 retry:
369 #endif
370 show_buttons = TRUE;
371 state = dialog_vars.default_button >= 0 ? dlg_default_button() : sTEXT;
372 fkey = 0;
373
374 dlg_button_layout(buttons, &mincols);
375 dlg_auto_size(title, "", &height, &width, 3 * LINES / 4, mincols);
376 dlg_print_size(height, width);
377 dlg_ctl_size(height, width);
378
379 x = dlg_box_x_ordinate(width);
380 y = dlg_box_y_ordinate(height);
381
382 dialog = dlg_new_window(height, width, y, x);
383 dlg_register_window(dialog, "editbox", binding);
384 dlg_register_buttons(dialog, "editbox", buttons);
385
386 dlg_mouse_setbase(x, y);
387
388 dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
389 dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
390 dlg_draw_title(dialog, title);
391
392 (void) wattrset(dialog, dialog_attr);
393
394 /* Draw the editing field in a box */
395 box_y = MARGIN + 0;
396 box_x = MARGIN + 1;
397 box_width = width - 2 - (2 * MARGIN);
398 box_height = height - (4 * MARGIN);
399
400 dlg_draw_box(dialog,
401 box_y,
402 box_x,
403 box_height,
404 box_width,
405 border_attr, border2_attr);
406 dlg_mouse_mkbigregion(box_y + MARGIN,
407 box_x + MARGIN,
408 box_height - (2 * MARGIN),
409 box_width - (2 * MARGIN),
410 KEY_MAX, 1, 1, 3);
411 editing = dlg_sub_window(dialog,
412 box_height - (2 * MARGIN),
413 box_width - (2 * MARGIN),
414 getbegy(dialog) + box_y + 1,
415 getbegx(dialog) + box_x + 1);
416 dlg_register_window(editing, "editbox2", binding2);
417
418 show_all = TRUE;
419 show_one = FALSE;
420 pagesize = getmaxy(editing);
421
422 while (result == DLG_EXIT_UNKNOWN) {
423 int edit = 0;
424
425 if (show_all) {
426 display_all(editing, *list, thisrow, base_row, listsize, chr_offset);
427 display_one(editing, THIS_ROW,
428 thisrow, thisrow, base_row, chr_offset);
429 show_all = FALSE;
430 show_one = TRUE;
431 } else {
432 if (thisrow != lastrow) {
433 display_one(editing, (*list)[lastrow],
434 lastrow, thisrow, base_row, 0);
435 show_one = TRUE;
436 }
437 }
438 if (show_one) {
439 display_one(editing, THIS_ROW,
440 thisrow, thisrow, base_row, chr_offset);
441 getyx(editing, y, x);
442 dlg_draw_scrollbar(dialog,
443 base_row,
444 base_row,
445 base_row + pagesize,
446 listsize,
447 box_x,
448 box_x + getmaxx(editing),
449 box_y + 0,
450 box_y + getmaxy(editing) + 1,
451 border2_attr,
452 border_attr);
453 wmove(editing, y, x);
454 show_one = FALSE;
455 }
456 lastrow = thisrow;
457 input = THIS_ROW;
458
459 /*
460 * The last field drawn determines where the cursor is shown:
461 */
462 if (show_buttons) {
463 show_buttons = FALSE;
464 UPDATE_COL(input);
465 if (state != sTEXT) {
466 display_one(editing, input, thisrow,
467 -1, base_row, 0);
468 wrefresh(editing);
469 }
470 dlg_draw_buttons(dialog,
471 height - 2,
472 0,
473 buttons,
474 (state != sTEXT) ? state : 99,
475 FALSE,
476 width);
477 if (state == sTEXT) {
478 display_one(editing, input, thisrow,
479 thisrow, base_row, chr_offset);
480 }
481 }
482
483 if (first_trace) {
484 first_trace = FALSE;
485 dlg_trace_win(dialog);
486 }
487
488 key = dlg_mouse_wgetch((state == sTEXT) ? editing : dialog, &fkey);
489 if (key == ERR) {
490 result = DLG_EXIT_ERROR;
491 break;
492 } else if (key == ESC) {
493 result = DLG_EXIT_ESC;
494 break;
495 }
496 if (state != sTEXT) {
497 if (dlg_result_key(key, fkey, &result))
498 break;
499 }
500
501 was_mouse = (fkey && is_DLGK_MOUSE(key));
502 if (was_mouse)
503 key -= M_EVENT;
504
505 /*
506 * Handle mouse clicks first, since we want to know if this is a
507 * button, or something that dlg_edit_string() should handle.
508 */
509 if (fkey
510 && was_mouse
511 && (code = dlg_ok_buttoncode(key)) >= 0) {
512 result = code;
513 continue;
514 }
515
516 if (was_mouse
517 && (key >= KEY_MAX)) {
518 int wide = getmaxx(editing);
519 int cell = key - KEY_MAX;
520 thisrow = (cell / wide) + base_row;
521 col_offset = (cell % wide);
522 chr_offset = col_to_chr_offset(THIS_ROW, col_offset);
523 show_one = TRUE;
524 if (state != sTEXT) {
525 state = sTEXT;
526 show_buttons = TRUE;
527 }
528 continue;
529 } else if (was_mouse && key >= KEY_MIN) {
530 key = dlg_lookup_key(dialog, key, &fkey);
531 }
532
533 if (state == sTEXT) { /* editing box selected */
534 /*
535 * Intercept scrolling keys that dlg_edit_string() does not
536 * understand.
537 */
538 if (fkey) {
539 bool moved = TRUE;
540
541 switch (key) {
542 case DLGK_GRID_UP:
543 SCROLL_TO(thisrow - 1);
544 break;
545 case DLGK_GRID_DOWN:
546 SCROLL_TO(thisrow + 1);
547 break;
548 case DLGK_PAGE_FIRST:
549 SCROLL_TO(0);
550 break;
551 case DLGK_PAGE_LAST:
552 SCROLL_TO(listsize);
553 break;
554 case DLGK_PAGE_NEXT:
555 SCROLL_TO(base_row + pagesize);
556 break;
557 case DLGK_PAGE_PREV:
558 if (thisrow > base_row) {
559 SCROLL_TO(base_row);
560 } else {
561 SCROLL_TO(base_row - pagesize);
562 }
563 break;
564 case DLGK_DELETE_LEFT:
565 if (chr_offset == 0) {
566 if (thisrow == 0) {
567 beep();
568 } else {
569 size_t len = (strlen(THIS_ROW) +
570 strlen(PREV_ROW) + 1);
571 char *tmp = dlg_malloc(char, len);
572
573 assert_ptr(tmp, "dlg_editbox");
574
575 chr_offset = dlg_count_wchars(PREV_ROW);
576 UPDATE_COL(PREV_ROW);
577 goal_col = col_offset;
578
579 sprintf(tmp, "%s%s", PREV_ROW, THIS_ROW);
580 if (len > max_len)
581 tmp[max_len] = '\0';
582
583 free(PREV_ROW);
584 PREV_ROW = tmp;
585 for (y = thisrow; y < listsize; ++y) {
586 (*list)[y] = (*list)[y + 1];
587 }
588 --listsize;
589 --thisrow;
590 SCROLL_TO(thisrow);
591
592 show_all = TRUE;
593 }
594 } else {
595 /* dlg_edit_string() can handle this case */
596 moved = FALSE;
597 }
598 break;
599 default:
600 moved = FALSE;
601 break;
602 }
603 if (moved) {
604 if (thisrow != lastrow) {
605 if (goal_col < 0)
606 goal_col = col_offset;
607 chr_offset = col_to_chr_offset(THIS_ROW, goal_col);
608 } else {
609 UPDATE_COL(THIS_ROW);
610 }
611 continue;
612 }
613 }
614 strncpy(buffer, input, max_len - 1)[max_len - 1] = '\0';
615 edit = dlg_edit_string(buffer, &chr_offset, key, fkey, FALSE);
616
617 if (edit) {
618 goal_col = UPDATE_COL(input);
619 if (strcmp(input, buffer)) {
620 free(input);
621 THIS_ROW = dlg_strclone(buffer);
622 input = THIS_ROW;
623 }
624 display_one(editing, input, thisrow,
625 thisrow, base_row, chr_offset);
626 continue;
627 }
628 }
629
630 /* handle non-functionkeys */
631 if (!fkey && (code = dlg_char_to_button(key, buttons)) >= 0) {
632 dlg_del_window(dialog);
633 result = dlg_ok_buttoncode(code);
634 continue;
635 }
636
637 /* handle functionkeys */
638 if (fkey) {
639 switch (key) {
640 case DLGK_FIELD_PREV:
641 show_buttons = TRUE;
642 state = dlg_prev_ok_buttonindex(state, sTEXT);
643 break;
644 case DLGK_FIELD_NEXT:
645 show_buttons = TRUE;
646 state = dlg_next_ok_buttonindex(state, sTEXT);
647 break;
648 case DLGK_ENTER:
649 if (state == sTEXT) {
650 const int *indx = dlg_index_wchars(THIS_ROW);
651 int split = indx[chr_offset];
652 char *tmp = dlg_strclone(THIS_ROW + split);
653
654 assert_ptr(tmp, "dlg_editbox");
655 grow_list(list, rows, listsize + 1);
656 ++listsize;
657 for (y = listsize; y > thisrow; --y) {
658 (*list)[y] = (*list)[y - 1];
659 }
660 THIS_ROW[split] = '\0';
661 ++thisrow;
662 chr_offset = 0;
663 col_offset = 0;
664 THIS_ROW = tmp;
665 SCROLL_TO(thisrow);
666 show_all = TRUE;
667 } else {
668 result = dlg_ok_buttoncode(state);
669 }
670 break;
671 #ifdef KEY_RESIZE
672 case KEY_RESIZE:
673 /* reset data */
674 height = old_height;
675 width = old_width;
676 /* repaint */
677 dlg_clear();
678 dlg_del_window(editing);
679 dlg_del_window(dialog);
680 refresh();
681 dlg_mouse_free_regions();
682 goto retry;
683 #endif
684 default:
685 beep();
686 break;
687 }
688 } else {
689 if ((key == ' ') && (state != sTEXT)) {
690 result = dlg_ok_buttoncode(state);
691 } else {
692 beep();
693 }
694 }
695 }
696
697 dlg_unregister_window(editing);
698 dlg_del_window(editing);
699 dlg_del_window(dialog);
700 dlg_mouse_free_regions();
701
702 /*
703 * The caller's copy of the (*list)[] array has been updated, but for
704 * consistency with the other widgets, we put the "real" result in
705 * the output buffer.
706 */
707 if (result == DLG_EXIT_OK) {
708 int n;
709 for (n = 0; n < listsize; ++n) {
710 dlg_add_result((*list)[n]);
711 dlg_add_separator();
712 }
713 dlg_add_last_key(-1);
714 }
715 free(buffer);
716 dlg_restore_vars(&save_vars);
717 return result;
718 }
719
720 int
dialog_editbox(const char * title,const char * file,int height,int width)721 dialog_editbox(const char *title, const char *file, int height, int width)
722 {
723 int result;
724 char **list;
725 int rows;
726
727 load_list(file, &list, &rows);
728 result = dlg_editbox(title, &list, &rows, height, width);
729 free_list(&list, &rows);
730 return result;
731 }
732