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30 * $Id: savescreen.c,v 1.58 2021/03/27 23:41:21 tom Exp $
32 * Demonstrate save/restore functions from the curses library.
33 * Thomas Dickey - 2007/7/14
37 #include <test.priv.h>
38 #include <popup_msg.h>
39 #include <parse_rgb.h>
43 #include <sys/types.h>
49 #define MyMarker ACS_DIAMOND
54 static bool use_init = FALSE;
55 static bool keep_dumps = FALSE;
58 /* In HPUX curses, cchar_t is opaque; other implementations are not */
60 BaseChar(cchar_t data)
62 wchar_t my_wchar[CCHARW_MAX];
66 if (getcchar(&data, my_wchar, &my_attr, &my_pair, NULL) == OK)
73 fexists(const char *name)
76 return (stat(name, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFREG);
87 cleanup(char *files[])
92 for (n = 0; files[n] != 0; ++n) {
99 load_screen(char *filename)
104 if ((result = scr_init(filename)) != ERR)
105 result = scr_restore(filename);
107 result = scr_set(filename);
113 * scr_restore() or scr_set() operates on curscr. If we read a character using
114 * getch() that will refresh stdscr, wiping out the result. To avoid that,
115 * copy the data back from curscr to stdscr.
120 overwrite(curscr, stdscr);
125 show_what(int color, int which, int last)
134 printw("Color %d. Saved %d of %d (? for help)", color, which, last + 1);
136 now = time((time_t *) 0);
137 mytime = ctime(&now);
138 for (n = (int) strlen(mytime) - 1; n >= 0; --n) {
139 if (isspace(UChar(mytime[n]))) {
145 mvprintw(0, (COLS - n - 2), " %s", mytime);
153 get_command(int color, int which, int last)
160 show_what(color, which, last);
168 dump_screen(char **files, int color, int which, int last, bool use_colors)
170 #if USE_WIDEC_SUPPORT
173 char *filename = files[which];
178 show_what(color, ++which, last);
179 if (scr_dump(filename) == ERR) {
181 printf("Cannot write screen-dump %s\n", filename);
183 ExitProgram(EXIT_SUCCESS);
187 int pair = 1 + (which % MAX_ANSI);
189 * Change the background color, to make it more obvious. But that
190 * changes the existing text-color. Copy the old values from the
191 * currently displayed screen.
193 bkgd((chtype) COLOR_PAIR(pair));
194 for (cy = 1; cy < LINES; ++cy) {
195 for (cx = 0; cx < COLS; ++cx) {
196 wmove(curscr, cy, cx);
197 wmove(stdscr, cy, cx);
198 #if USE_WIDEC_SUPPORT
199 if (win_wch(curscr, &mycc) != ERR) {
200 int myxx = wcwidth(BaseChar(mycc));
202 wadd_wchnstr(stdscr, &mycc, 1);
207 waddch(stdscr, winch(curscr));
219 static const char *msgs[] =
221 "You are now in the screen-editor, which allows you to make some",
222 "lines on the screen, as well as save copies of the screen to a",
227 " n run the screen-loader to show the saved screens",
228 " <space> dump a screen",
230 " a toggle between '#' and graphic symbol for drawing",
231 " c change color drawn by line to next in palette",
232 " h,j,k,l or arrows to move around the screen, drawing",
235 popup_msg(stdscr, msgs);
241 static const char *msgs[] =
243 "You are now in the screen-loader, which allows you to view",
244 "the dumped/restored screens.",
248 " <space> load the next screen",
249 " <backspace> load the previous screen",
252 popup_msg(stdscr, msgs);
258 static const char *msg[] =
260 "Usage: savescreen [-r] files",
263 " -f file fill/initialize screen using text from this file",
264 " -i use scr_init/scr_restore rather than scr_set",
265 " -k keep the restored dump-files rather than removing them",
266 " -r replay the screen-dump files"
269 for (n = 0; n < SIZEOF(msg); ++n) {
270 fprintf(stderr, "%s\n", msg[n]);
272 ExitProgram(EXIT_FAILURE);
276 main(int argc, char *argv[])
281 bool use_colors = FALSE;
282 bool replaying = FALSE;
286 #if USE_WIDEC_SUPPORT
288 static const wchar_t mywc[2] =
292 setlocale(LC_ALL, "");
294 while ((ch = getopt(argc, argv, "f:ikr")) != -1) {
314 files = argv + optind;
315 last = argc - optind - 1;
318 while (last >= 0 && !fexists(files[last]))
325 keypad(stdscr, TRUE);
328 if (has_colors() && (start_color() == OK) && COLORS >= MAX_ANSI) {
329 #if USE_WIDEC_SUPPORT
330 bool using_rgb = FALSE;
332 static const struct {
334 } table[MAX_ANSI] = {
335 #define DATA(fg,bg) { COLOR_##fg, COLOR_##bg }
340 DATA(MAGENTA, WHITE),
341 DATA(MAGENTA, BLACK),
351 * Discounting color-pair 0 (no color), make the next 8 color pairs
352 * useful for leaving a visually distinct trail of characters on the
355 for (n = 0; n < MAX_ANSI; ++n) {
356 init_pair((short) pair++, (short) table[n].fg, (short) table[n].bg);
359 * After that, use color pairs for constructing a test-pattern, e.g.,
360 * imitating xterm's scripts.
364 for (n = 0; n < COLORS; ++n)
365 init_pair((short) (n + MAX_ANSI), (short) n, (short) n);
367 #if HAVE_TIGETSTR && USE_WIDEC_SUPPORT
369 int r_max, g_max, b_max;
371 if (parse_rgb(&r_max, &g_max, &b_max) > 0) {
372 int rows = LINES - 1;
374 int b_delta = (b_max / rows);
375 int r_delta = (r_max / cols);
376 int g_delta = (g_max / cols);
381 while (row++ < rows) {
385 while (col++ < cols) {
386 int color = (((r * (g_max + 1)) + g) * (b_max + 1)
388 #if USE_EXTENDED_COLOR
389 init_extended_pair(pair, color, color);
391 init_pair(pair, color, color);
403 if ((fill_by == 0) && !replaying) {
404 #if USE_WIDEC_SUPPORT
408 * Originally (before wide-characters) ncurses supported 16 colors.
410 if (COLORS >= 16 && COLORS <= 256) {
411 mvprintw(2, 0, "System colors:\n");
412 for (n = 0; n < 16; ++n) {
414 addch((chtype) (' ' | COLOR_PAIR(pair)));
415 addch((chtype) (' ' | COLOR_PAIR(pair)));
416 if (((n + 1) % 8) == 0)
421 * Even with ncurses, you need wide-character support to have more
424 #if USE_WIDEC_SUPPORT
427 } else if (COLORS == 256) {
433 int cube1 = cube0 + (cube * cube * cube);
436 printw("Color cube, %dx%dx%d:\n", cube, cube, cube);
437 for (g = 0; g < cube; g++) {
438 for (r = 0; r < cube; r++) {
439 for (b = 0; b < cube; b++) {
442 + (r * cube * cube) + (g * cube) + b;
443 setcchar(&mycc, mywc, 0, (short) pair, NULL);
452 printw("Grayscale ramp:\n");
453 for (n = cube1; n < COLORS; ++n) {
455 setcchar(&mycc, mywc, 0, (short) pair, NULL);
459 } else if ((COLORS > 256) && using_rgb) {
460 int rows = LINES - 1;
465 while (row++ < rows) {
467 while (col++ < cols) {
468 setcchar(&mycc, mywc, 0, (short) pair, &pair);
481 FILE *fp = fopen(fill_by, "r");
485 while ((ch = fgetc(fp)) != EOF) {
486 if (addch(UChar(ch)) == ERR) {
493 while (addch(' ') != ERR) {
500 fprintf(stderr, "Cannot open \"%s\"\n", fill_by);
501 ExitProgram(EXIT_FAILURE);
508 * Use the last file as the initial/current screen.
512 printf("No screen-dumps given\n");
513 ExitProgram(EXIT_FAILURE);
517 if (load_screen(files[which]) == ERR) {
519 printf("Cannot load screen-dump %s\n", files[which]);
520 ExitProgram(EXIT_FAILURE);
524 while (!done && (ch = getch()) != ERR) {
528 * If we got a "next" here, skip to the final screen before
529 * moving to the next process.
558 } else if (scr_restore(files[which]) == ERR) {
560 printf("Cannot load screen-dump %s\n", files[which]);
562 ExitProgram(EXIT_FAILURE);
573 bool dirty = use_colors || (fill_by != 0);
576 switch (get_command(color, which, last)) {
578 if (dirty && files[which]) {
579 dump_screen(files, color, which, last, use_colors);
589 if (dump_screen(files, color, which, last, use_colors)) {
590 which = (which + 1) % MAX_ANSI;
618 altchars = !altchars;
622 color = (color + 1) % MAX_ANSI;
633 chtype attr = A_REVERSE;
634 chtype ch2 = (altchars ? MyMarker : '#');
636 attr |= (chtype) COLOR_PAIR(color);
646 ExitProgram(EXIT_SUCCESS);
651 main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
653 printf("This program requires the screen-dump functions\n");
654 ExitProgram(EXIT_FAILURE);