source: trunk/ncurses/test/cardfile.c@ 2996

Last change on this file since 2996 was 2621, checked in by bird, 20 years ago

GNU ncurses 5.5
File size: 13.3 KB
Line 
1/****************************************************************************
2 * Copyright (c) 1999-2003,2004 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29/*
30 * Author: Thomas E. Dickey
31 *
32 * $Id: cardfile.c,v 1.27 2004/11/06 19:33:39 tom Exp $
33 *
34 * File format: text beginning in column 1 is a title; other text is content.
35 */
36
37#include <test.priv.h>
38
39#if USE_LIBFORM && USE_LIBPANEL
40
41#include <form.h>
42#include <panel.h>
43
44#define VISIBLE_CARDS 10
45#define OFFSET_CARD 2
46#define pair_1 1
47#define pair_2 2
48
49#define isVisible(cardp) ((cardp)->panel != 0)
50
51enum {
52 MY_CTRL_x = MAX_FORM_COMMAND
53 ,MY_CTRL_N
54 ,MY_CTRL_P
55 ,MY_CTRL_Q
56 ,MY_CTRL_W
57};
58
59typedef struct _card {
60 struct _card *link;
61 PANEL *panel;
62 FORM *form;
63 char *title;
64 char *content;
65} CARD;
66
67static CARD *all_cards;
68static bool try_color = FALSE;
69static char default_name[] = "cardfile.dat";
70
71#if !HAVE_STRDUP
72#define strdup my_strdup
73static char *
74strdup(char *s)
75{
76 char *p = (char *) malloc(strlen(s) + 1);
77 if (p)
78 strcpy(p, s);
79 return (p);
80}
81#endif /* not HAVE_STRDUP */
82
83static const char *
84skip(const char *buffer)
85{
86 while (isspace(UChar(*buffer)))
87 buffer++;
88 return buffer;
89}
90
91static void
92trim(char *buffer)
93{
94 unsigned n = strlen(buffer);
95 while (n-- && isspace(UChar(buffer[n])))
96 buffer[n] = 0;
97}
98
99/*******************************************************************************/
100
101static CARD *
102add_title(const char *title)
103{
104 CARD *card, *p, *q;
105
106 for (p = all_cards, q = 0; p != 0; q = p, p = p->link) {
107 int cmp = strcmp(p->title, title);
108 if (cmp == 0)
109 return p;
110 if (cmp > 0)
111 break;
112 }
113
114 card = (CARD *) calloc(1, sizeof(CARD));
115 card->title = strdup(title);
116 card->content = strdup("");
117
118 if (q == 0) {
119 card->link = all_cards;
120 all_cards = card;
121 } else {
122 card->link = q->link;
123 q->link = card;
124 }
125
126 return card;
127}
128
129static void
130add_content(CARD * card, const char *content)
131{
132 unsigned total, offset;
133
134 content = skip(content);
135 if ((total = strlen(content)) != 0) {
136 if ((offset = strlen(card->content)) != 0) {
137 total += 1 + offset;
138 card->content = (char *) realloc(card->content, total + 1);
139 strcpy(card->content + offset++, " ");
140 } else {
141 if (card->content != 0)
142 free(card->content);
143 card->content = (char *) malloc(total + 1);
144 }
145 strcpy(card->content + offset, content);
146 }
147}
148
149static CARD *
150new_card(void)
151{
152 CARD *card = add_title("");
153 add_content(card, "");
154 return card;
155}
156
157static CARD *
158find_card(char *title)
159{
160 CARD *card;
161
162 for (card = all_cards; card != 0; card = card->link)
163 if (!strcmp(card->title, title))
164 break;
165
166 return card;
167}
168
169static void
170read_data(char *fname)
171{
172 FILE *fp;
173 CARD *card = 0;
174 char buffer[BUFSIZ];
175
176 if ((fp = fopen(fname, "r")) != 0) {
177 while (fgets(buffer, sizeof(buffer), fp)) {
178 trim(buffer);
179 if (isspace(UChar(*buffer))) {
180 if (card == 0)
181 card = add_title("");
182 add_content(card, buffer);
183 } else if ((card = find_card(buffer)) == 0) {
184 card = add_title(buffer);
185 }
186 }
187 fclose(fp);
188 }
189}
190
191/*******************************************************************************/
192
193static void
194write_data(const char *fname)
195{
196 FILE *fp;
197 CARD *p = 0;
198 int n;
199
200 if (!strcmp(fname, default_name))
201 fname = "cardfile.out";
202
203 if ((fp = fopen(fname, "w")) != 0) {
204 for (p = all_cards; p != 0; p = p->link) {
205 FIELD **f = form_fields(p->form);
206 for (n = 0; f[n] != 0; n++) {
207 char *s = field_buffer(f[n], 0);
208 if (s != 0
209 && (s = strdup(s)) != 0) {
210 trim(s);
211 fprintf(fp, "%s%s\n", n ? "\t" : "", s);
212 free(s);
213 }
214 }
215 }
216 fclose(fp);
217 }
218}
219
220/*******************************************************************************/
221
222/*
223 * Count the cards
224 */
225static int
226count_cards(void)
227{
228 CARD *p;
229 int count = 0;
230
231 for (p = all_cards; p != 0; p = p->link)
232 count++;
233
234 return count;
235}
236
237/*
238 * Shuffle the panels to keep them in a natural hierarchy.
239 */
240static void
241order_cards(CARD * first, int depth)
242{
243 if (first) {
244 if (depth && first->link)
245 order_cards(first->link, depth - 1);
246 if (isVisible(first))
247 top_panel(first->panel);
248 }
249}
250
251/*
252 * Return the next card in the list
253 */
254static CARD *
255next_card(CARD * now)
256{
257 if (now->link != 0) {
258 CARD *tst = now->link;
259 if (isVisible(tst))
260 now = tst;
261 else
262 tst = next_card(tst);
263 }
264 return now;
265}
266
267/*
268 * Return the previous card in the list
269 */
270static CARD *
271prev_card(CARD * now)
272{
273 CARD *p;
274 for (p = all_cards; p != 0; p = p->link) {
275 if (p->link == now) {
276 if (!isVisible(p))
277 p = prev_card(p);
278 return p;
279 }
280 }
281 return now;
282}
283
284/*
285 * Returns the first card in the list that we will display.
286 */
287static CARD *
288first_card(CARD * now)
289{
290 if (!isVisible(now))
291 now = next_card(now);
292 return now;
293}
294
295/*******************************************************************************/
296
297static int
298form_virtualize(WINDOW *w)
299{
300 int c = wgetch(w);
301
302 switch (c) {
303 case CTRL('W'):
304 return (MY_CTRL_W);
305 case CTRL('N'):
306 return (MY_CTRL_N);
307 case CTRL('P'):
308 return (MY_CTRL_P);
309 case CTRL('Q'):
310 case 033:
311 return (MY_CTRL_Q);
312
313 case KEY_BACKSPACE:
314 return (REQ_DEL_PREV);
315 case KEY_DC:
316 return (REQ_DEL_CHAR);
317 case KEY_LEFT:
318 return (REQ_LEFT_CHAR);
319 case KEY_RIGHT:
320 return (REQ_RIGHT_CHAR);
321
322 case KEY_DOWN:
323 case KEY_NEXT:
324 return (REQ_NEXT_FIELD);
325 case KEY_UP:
326 case KEY_PREVIOUS:
327 return (REQ_PREV_FIELD);
328
329 default:
330 return (c);
331 }
332}
333
334static FIELD **
335make_fields(CARD * p, int form_high, int form_wide)
336{
337 FIELD **f = (FIELD **) calloc(3, sizeof(FIELD *));
338
339 f[0] = new_field(1, form_wide, 0, 0, 0, 0);
340 set_field_back(f[0], A_REVERSE);
341 set_field_buffer(f[0], 0, p->title);
342 field_opts_off(f[0], O_BLANK);
343
344 f[1] = new_field(form_high - 1, form_wide, 1, 0, 0, 0);
345 set_field_buffer(f[1], 0, p->content);
346 set_field_just(f[1], JUSTIFY_LEFT);
347 field_opts_off(f[1], O_BLANK);
348
349 f[2] = 0;
350 return f;
351}
352
353static void
354show_legend(void)
355{
356 erase();
357 move(LINES - 3, 0);
358 addstr("^Q/ESC -- exit form ^W -- writes data to file\n");
359 addstr("^N -- go to next card ^P -- go to previous card\n");
360 addstr("Arrow keys move left/right within a field, up/down between fields");
361}
362
363#if (defined(KEY_RESIZE) && HAVE_WRESIZE) || NO_LEAKS
364static void
365free_form_fields(FIELD ** f)
366{
367 int n;
368
369 for (n = 0; f[n] != 0; ++n) {
370 free_field(f[n]);
371 }
372 free(f);
373}
374#endif
375
376/*******************************************************************************/
377
378static void
379cardfile(char *fname)
380{
381 WINDOW *win;
382 CARD *p;
383 CARD *top_card;
384 int visible_cards;
385 int panel_wide;
386 int panel_high;
387 int form_wide;
388 int form_high;
389 int y;
390 int x;
391 int ch = ERR;
392 int last_ch;
393 int finished = FALSE;
394
395 show_legend();
396
397 /* decide how many cards we can display */
398 visible_cards = count_cards();
399 while (
400 (panel_wide = COLS - (visible_cards * OFFSET_CARD)) < 10 ||
401 (panel_high = LINES - (visible_cards * OFFSET_CARD) - 5) < 5) {
402 --visible_cards;
403 }
404 form_wide = panel_wide - 2;
405 form_high = panel_high - 2;
406 y = (visible_cards - 1) * OFFSET_CARD;
407 x = 0;
408
409 /* make a panel for each CARD */
410 for (p = all_cards; p != 0; p = p->link) {
411
412 if ((win = newwin(panel_high, panel_wide, y, x)) == 0)
413 break;
414
415 wbkgd(win, COLOR_PAIR(pair_2));
416 keypad(win, TRUE);
417 p->panel = new_panel(win);
418 box(win, 0, 0);
419
420 p->form = new_form(make_fields(p, form_high, form_wide));
421 set_form_win(p->form, win);
422 set_form_sub(p->form, derwin(win, form_high, form_wide, 1, 1));
423 post_form(p->form);
424
425 y -= OFFSET_CARD;
426 x += OFFSET_CARD;
427 }
428
429 top_card = first_card(all_cards);
430 order_cards(top_card, visible_cards);
431
432 while (!finished) {
433 update_panels();
434 doupdate();
435
436 last_ch = ch;
437 ch = form_virtualize(panel_window(top_card->panel));
438 switch (form_driver(top_card->form, ch)) {
439 case E_OK:
440 break;
441 case E_UNKNOWN_COMMAND:
442 switch (ch) {
443 case MY_CTRL_Q:
444 finished = TRUE;
445 break;
446 case MY_CTRL_P:
447 top_card = prev_card(top_card);
448 order_cards(top_card, visible_cards);
449 break;
450 case MY_CTRL_N:
451 top_card = next_card(top_card);
452 order_cards(top_card, visible_cards);
453 break;
454 case MY_CTRL_W:
455 form_driver(top_card->form, REQ_VALIDATION);
456 write_data(fname);
457 break;
458#if defined(KEY_RESIZE) && HAVE_WRESIZE
459 case KEY_RESIZE:
460 /* resizeterm already did "something" reasonable, but it cannot
461 * know much about layout. So let's make it nicer.
462 */
463 panel_wide = COLS - (visible_cards * OFFSET_CARD);
464 panel_high = LINES - (visible_cards * OFFSET_CARD) - 5;
465
466 form_wide = panel_wide - 2;
467 form_high = panel_high - 2;
468
469 y = (visible_cards - 1) * OFFSET_CARD;
470 x = 0;
471
472 show_legend();
473 for (p = all_cards; p != 0; p = p->link) {
474 FIELD **oldf = form_fields(p->form);
475 WINDOW *olds = form_sub(p->form);
476
477 if (!isVisible(p))
478 continue;
479 win = form_win(p->form);
480
481 /* move and resize the card as needed
482 * FIXME: if the windows are shrunk too much, this won't do
483 */
484 mvwin(win, y, x);
485 wresize(win, panel_high, panel_wide);
486
487 /* reconstruct each form. Forms are not resizable, and
488 * there appears to be no good way to reload the text in
489 * a resized window.
490 */
491 werase(win);
492
493 unpost_form(p->form);
494 free_form(p->form);
495
496 p->form = new_form(make_fields(p, form_high, form_wide));
497 set_form_win(p->form, win);
498 set_form_sub(p->form, derwin(win, form_high, form_wide,
499 1, 1));
500 post_form(p->form);
501
502 free_form_fields(oldf);
503 delwin(olds);
504
505 box(win, 0, 0);
506
507 y -= OFFSET_CARD;
508 x += OFFSET_CARD;
509 }
510 break;
511#endif
512 default:
513 beep();
514 break;
515 }
516 break;
517 default:
518 flash();
519 break;
520 }
521 }
522#if NO_LEAKS
523 while (all_cards != 0) {
524 FIELD **f;
525 int count;
526
527 p = all_cards;
528 all_cards = all_cards->link;
529
530 if (isVisible(p)) {
531 f = form_fields(p->form);
532 count = field_count(p->form);
533
534 unpost_form(p->form); /* ...so we can free it */
535 free_form(p->form); /* this also disconnects the fields */
536
537 free_form_fields(f);
538
539 del_panel(p->panel);
540 }
541 free(p->title);
542 free(p->content);
543 free(p);
544 }
545#endif
546}
547
548static void
549usage(void)
550{
551 static const char *msg[] =
552 {
553 "Usage: view [options] file"
554 ,""
555 ,"Options:"
556 ," -c use color if terminal supports it"
557 };
558 size_t n;
559 for (n = 0; n < SIZEOF(msg); n++)
560 fprintf(stderr, "%s\n", msg[n]);
561 ExitProgram(EXIT_FAILURE);
562}
563
564/*******************************************************************************/
565
566int
567main(int argc, char *argv[])
568{
569 int n;
570
571 setlocale(LC_ALL, "");
572
573 while ((n = getopt(argc, argv, "c")) != EOF) {
574 switch (n) {
575 case 'c':
576 try_color = TRUE;
577 break;
578 default:
579 usage();
580 }
581 }
582
583 initscr();
584 cbreak();
585 noecho();
586
587 if (try_color) {
588 if (has_colors()) {
589 start_color();
590 init_pair(pair_1, COLOR_WHITE, COLOR_BLUE);
591 init_pair(pair_2, COLOR_WHITE, COLOR_CYAN);
592 bkgd(COLOR_PAIR(pair_1));
593 } else {
594 try_color = FALSE;
595 }
596 }
597
598 if (optind + 1 == argc) {
599 for (n = 1; n < argc; n++)
600 read_data(argv[n]);
601 if (count_cards() == 0)
602 new_card();
603 cardfile(argv[1]);
604 } else {
605 read_data(default_name);
606 if (count_cards() == 0)
607 new_card();
608 cardfile(default_name);
609 }
610
611 endwin();
612
613 ExitProgram(EXIT_SUCCESS);
614}
615#else
616int
617main(void)
618{
619 printf("This program requires the curses form and panel libraries\n");
620 ExitProgram(EXIT_FAILURE);
621}
622#endif
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