release/src/router/libncurses/test/savescreen.c

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  28 /*
  29  * $Id: savescreen.c,v 1.27 2015/03/28 23:21:28 tom Exp $
  30  *
  31  * Demonstrate save/restore functions from the curses library.
  32  * Thomas Dickey - 2007/7/14
  33  */
  34
  35 #include <test.priv.h>
  36
  37 #if HAVE_SCR_DUMP
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52
  53 static bool use_init = FALSE;
  54 static bool keep_dumps = FALSE;
  55
  56 static int
  57 fexists(const char *name)
  58 {
  59     struct stat sb;
  60     return (stat(name, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFREG);
  61 }
  62
  63 static void
  64 setup_next(void)
  65 {
  66     curs_set(1);
  67     reset_shell_mode();
  68 }
  69
  70 static void
  71 cleanup(char *files[])
  72 {
  73     int n;
  74
  75     if (!keep_dumps) {
  76         for (n = 0; files[n] != 0; ++n) {
  77             unlink(files[n]);
  78         }
  79     }
  80 }
  81
  82 static int
  83 load_screen(char *filename)
  84 {
  85     int result;
  86
  87     if (use_init) {
  88         if ((result = scr_init(filename)) != ERR)
  89             result = scr_restore(filename);
  90     } else {
  91         result = scr_set(filename);
  92     }
  93     return result;
  94 }
  95
  96 /*
  97  * scr_restore() or scr_set() operates on curscr.  If we read a character using
  98  * getch() that will refresh stdscr, wiping out the result.  To avoid that,
  99  * copy the data back from curscr to stdscr.
 100  */
 101 static void
 102 after_load(void)
 103 {
 104     overwrite(curscr, stdscr);
 105     doupdate();
 106 }
 107
 108 static void
 109 show_what(int which, int last)
 110 {
 111     int y, x, n;
 112     time_t now;
 113     char *mytime;
 114
 115     getyx(stdscr, y, x);
 116
 117     move(0, 0);
 118     printw("Saved %d of %d (? for help)", which, last + 1);
 119
 120     now = time((time_t *) 0);
 121     mytime = ctime(&now);
 122     for (n = (int) strlen(mytime) - 1; n >= 0; --n) {
 123         if (isspace(UChar(mytime[n]))) {
 124             mytime[n] = '\0';
 125         } else {
 126             break;
 127         }
 128     }
 129     mvprintw(0, (COLS - n - 2), " %s", mytime);
 130
 131     move(y, x);
 132
 133     refresh();
 134 }
 135
 136 static int
 137 get_command(int which, int last)
 138 {
 139     int ch;
 140
 141     timeout(50);
 142
 143     do {
 144         show_what(which, last);
 145         ch = getch();
 146     } while (ch == ERR);
 147
 148     return ch;
 149 }
 150
 151 static void
 152 show_help(const char **help)
 153 {
 154     WINDOW *mywin = newwin(LINES, COLS, 0, 0);
 155     int n;
 156
 157     box(mywin, 0, 0);
 158     wmove(mywin, 1, 1);
 159     for (n = 0; help[n] != 0; ++n) {
 160         wmove(mywin, 1 + n, 2);
 161         wprintw(mywin, "%.*s", COLS - 4, help[n]);
 162     }
 163     wgetch(mywin);
 164     delwin(mywin);
 165     touchwin(stdscr);
 166     refresh();
 167 }
 168
 169 static void
 170 editor_help(void)
 171 {
 172     static const char *msgs[] =
 173     {
 174         "You are now in the screen-editor, which allows you to make some",
 175         "lines on the screen, as well as save copies of the screen to a",
 176         "temporary file",
 177         "",
 178         "Keys:",
 179         "   q           quit",
 180         "   n           run the screen-loader to show the saved screens",
 181         "   <space>     dump a screen",
 182         "",
 183         "   a           toggle between '#' and graphic symbol for drawing",
 184         "   c           change color drawn by line to next in palette",
 185         "   h,j,k,l or arrows to move around the screen, drawing",
 186     };
 187     show_help(msgs);
 188 }
 189
 190 static void
 191 replay_help(void)
 192 {
 193     static const char *msgs[] =
 194     {
 195         "You are now in the screen-loader, which allows you to view",
 196         "the dumped/restored screens.",
 197         "",
 198         "Keys:",
 199         "   q           quit",
 200         "   <space>     load the next screen",
 201         "   <backspace> load the previous screen",
 202     };
 203     show_help(msgs);
 204 }
 205
 206 static void
 207 usage(void)
 208 {
 209     static const char *msg[] =
 210     {
 211         "Usage: savescreen [-r] files",
 212         "",
 213         "Options:",
 214         " -f file  fill/initialize screen using text from this file",
 215         " -i       use scr_init/scr_restore rather than scr_set",
 216         " -k       keep the restored dump-files rather than removing them",
 217         " -r       replay the screen-dump files"
 218     };
 219     unsigned n;
 220     for (n = 0; n < SIZEOF(msg); ++n) {
 221         fprintf(stderr, "%s\n", msg[n]);
 222     }
 223     ExitProgram(EXIT_FAILURE);
 224 }
 225
 226 int
 227 main(int argc, char *argv[])
 228 {
 229     int ch;
 230     int which = 0;
 231     int last;
 232     bool replaying = FALSE;
 233     bool done = FALSE;
 234     char **files;
 235     char *fill_by = 0;
 236 #if USE_WIDEC_SUPPORT
 237     cchar_t mycc;
 238     int myxx;
 239 #endif
 240
 241     setlocale(LC_ALL, "");
 242
 243     while ((ch = getopt(argc, argv, "f:ikr")) != -1) {
 244         switch (ch) {
 245         case 'f':
 246             fill_by = optarg;
 247             break;
 248         case 'i':
 249             use_init = TRUE;
 250             break;
 251         case 'k':
 252             keep_dumps = TRUE;
 253             break;
 254         case 'r':
 255             replaying = TRUE;
 256             break;
 257         default:
 258             usage();
 259             break;
 260         }
 261     }
 262
 263     files = argv + optind;
 264     last = argc - optind - 1;
 265
 266     if (replaying) {
 267         while (last >= 0 && !fexists(files[last]))
 268             --last;
 269     }
 270
 271     initscr();
 272     cbreak();
 273     noecho();
 274     keypad(stdscr, TRUE);
 275     curs_set(0);
 276     if (has_colors()) {
 277         short pair;
 278         short color;
 279
 280         start_color();
 281         /*
 282          * Assume pairs is the square of colors, and assign pairs going down
 283          * so that there is minimal conflict with the background color (which
 284          * counts up).  The intent is just to show how color pair values are
 285          * saved and restored.
 286          */
 287         for (pair = 0; pair < COLOR_PAIRS; ++pair) {
 288             color = (short) (pair % (COLORS - 1));
 289             init_pair(pair, (short) (COLOR_WHITE - color), color);
 290         }
 291     }
 292
 293     if (fill_by != 0) {
 294         FILE *fp = fopen(fill_by, "r");
 295         if (fp != 0) {
 296             bool filled = FALSE;
 297             move(1, 0);
 298             while ((ch = fgetc(fp)) != EOF) {
 299                 if (addch(UChar(ch)) == ERR) {
 300                     filled = TRUE;
 301                     break;
 302                 }
 303             }
 304             fclose(fp);
 305             if (!filled) {
 306                 while (addch(' ') != ERR) {
 307                     ;
 308                 }
 309             }
 310             move(0, 0);
 311         } else {
 312             endwin();
 313             fprintf(stderr, "Cannot open \"%s\"\n", fill_by);
 314             ExitProgram(EXIT_FAILURE);
 315         }
 316     }
 317
 318     if (replaying) {
 319
 320         /*
 321          * Use the last file as the initial/current screen.
 322          */
 323         if (last < 0) {
 324             endwin();
 325             printf("No screen-dumps given\n");
 326             ExitProgram(EXIT_FAILURE);
 327         }
 328
 329         which = last;
 330         if (load_screen(files[which]) == ERR) {
 331             endwin();
 332             printf("Cannot load screen-dump %s\n", files[which]);
 333             ExitProgram(EXIT_FAILURE);
 334         }
 335         after_load();
 336
 337         while (!done && (ch = getch()) != ERR) {
 338             switch (ch) {
 339             case 'n':
 340                 /*
 341                  * If we got a "next" here, skip to the final screen before
 342                  * moving to the next process.
 343                  */
 344                 setup_next();
 345                 which = last;
 346                 done = TRUE;
 347                 break;
 348             case 'q':
 349                 cleanup(files);
 350                 done = TRUE;
 351                 break;
 352             case KEY_BACKSPACE:
 353             case '\b':
 354                 if (--which < 0)
 355                     which = last;
 356                 break;
 357             case ' ':
 358                 if (++which > last)
 359                     which = 0;
 360                 break;
 361             case '?':
 362                 replay_help();
 363                 break;
 364             default:
 365                 beep();
 366                 continue;
 367             }
 368
 369             if (ch == 'q') {
 370                 ;
 371             } else if (scr_restore(files[which]) == ERR) {
 372                 endwin();
 373                 printf("Cannot load screen-dump %s\n", files[which]);
 374                 cleanup(files);
 375                 ExitProgram(EXIT_FAILURE);
 376             } else {
 377                 wrefresh(curscr);
 378             }
 379         }
 380         endwin();
 381     } else {
 382         int y = 0;
 383         int x = 0;
 384         int color = 0;
 385         int altchars = 0;
 386
 387         while (!done) {
 388             switch (get_command(which, last)) {
 389             case 'n':
 390                 setup_next();
 391                 done = TRUE;
 392                 break;
 393             case 'q':
 394                 cleanup(files);
 395                 done = TRUE;
 396                 break;
 397             case ' ':
 398                 if (files[which] != 0) {
 399                     show_what(which + 1, last);
 400                     if (scr_dump(files[which]) == ERR) {
 401                         endwin();
 402                         printf("Cannot write screen-dump %s\n", files[which]);
 403                         cleanup(files);
 404                         done = TRUE;
 405                         break;
 406                     }
 407                     ++which;
 408                     if (has_colors()) {
 409                         int cx, cy;
 410                         short pair = (short) (which % COLOR_PAIRS);
 411                         /*
 412                          * Change the background color, to make it more
 413                          * obvious.  But that changes the existing text-color.
 414                          * Copy the old values from the currently displayed
 415                          * screen.
 416                          */
 417                         bkgd((chtype) COLOR_PAIR(pair));
 418                         for (cy = 1; cy < LINES; ++cy) {
 419                             for (cx = 0; cx < COLS; ++cx) {
 420                                 wmove(curscr, cy, cx);
 421                                 wmove(stdscr, cy, cx);
 422 #if USE_WIDEC_SUPPORT
 423                                 if (win_wch(curscr, &mycc) != ERR) {
 424                                     myxx = wcwidth(mycc.chars[0]);
 425                                     if (myxx > 0) {
 426                                         wadd_wchnstr(stdscr, &mycc, 1);
 427                                         cx += (myxx - 1);
 428                                     }
 429                                 }
 430 #else
 431                                 waddch(stdscr, winch(curscr));
 432 #endif
 433                             }
 434                         }
 435                     }
 436                 } else {
 437                     beep();
 438                 }
 439                 break;
 440             case KEY_LEFT:
 441             case 'h':
 442                 if (--x < 0)
 443                     x = COLS - 1;
 444                 break;
 445             case KEY_DOWN:
 446             case 'j':
 447                 if (++y >= LINES)
 448                     y = 1;
 449                 break;
 450             case KEY_UP:
 451             case 'k':
 452                 if (--y < 1)
 453                     y = LINES - 1;
 454                 break;
 455             case KEY_RIGHT:
 456             case 'l':
 457                 if (++x >= COLS)
 458                     x = 0;
 459                 break;
 460             case 'a':
 461                 altchars = !altchars;
 462                 break;
 463             case 'c':
 464                 color = (color + 1) % COLORS;
 465                 break;
 466             case '?':
 467                 editor_help();
 468                 break;
 469             default:
 470                 beep();
 471                 continue;
 472             }
 473             if (!done) {
 474                 attr_t attr = (A_REVERSE | COLOR_PAIR(color * COLORS));
 475                 chtype ch2 = (altchars ? ACS_DIAMOND : '#');
 476                 move(y, x);
 477                 addch(ch2 | attr);
 478                 move(y, x);
 479             }
 480         }
 481         endwin();
 482     }
 483     ExitProgram(EXIT_SUCCESS);
 484 }
 485
 486 #else
 487 int
 488 main(int argc, char *argv[])
 489 {
 490     printf("This program requires the screen-dump functions\n");
 491     ExitProgram(EXIT_FAILURE);
 492 }
 493 #endif