2 * Curses UI for slide puzzle game
3 * Copyright © 2022-2024 Nick Bowler
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <https://www.gnu.org/licenses/>.
32 #include "cursesopt.h"
35 GAME_YPOS = 1 /* top row of game and goal areas. */
38 static const char *progname = "rrace";
40 static struct app_state state;
42 static void print_version(void)
44 version_print_head("rrace-curses", stdout);
45 puts("License GPLv3+: GNU GPL version 3 or any later version");
46 puts("This is free software: you are free to change and redistribute it.");
47 puts("There is NO WARRANTY, to the extent permitted by law.");
50 static void print_usage(FILE *f)
52 fprintf(f, "Usage: %s [options]\n", progname);
54 fprintf(f, "Try %s --help for more information.\n", progname);
57 static void print_help(const struct option *lopts)
59 struct lopt_help help = {0};
60 const struct option *opt;
66 for (opt = lopts; opt->name; opt++) {
67 if (!lopt_get_help(opt, &help))
69 help_print_option(opt, help.arg, help.desc, 20);
73 printf("Report bugs to <%s>.\n", PACKAGE_BUGREPORT);
76 static void draw_tile(WINDOW **win, unsigned colour, unsigned selected,
77 unsigned x, unsigned y, unsigned start_column)
79 WINDOW *border = win[PLAYWIN_TILEBORDER], *fill = win[PLAYWIN_TILEFILL];
80 int w, h, attr, ch, bc = selected ? '#' : 0;
82 assert(colour < TILE_MAX);
83 attr = COLOR_PAIR(colour);
85 case TILE_RED: ch = 'X'; break;
86 case TILE_ORANGE: ch = '|'; break;
87 case TILE_GREEN: ch = '+'; break;
88 case TILE_YELLOW: ch = '~'; attr |= A_BOLD; break;
89 case TILE_BLUE: ch = 'o'; attr |= A_BOLD; break;
90 case TILE_WHITE: ch = '.'; attr |= A_BOLD; break;
92 case TILE_EMPTY: attr = A_BOLD|COLOR_PAIR(RR_COLOUR_SHADOW);
95 getmaxyx(border, h, w);
98 if (mvwin(border, 1+GAME_YPOS+h*y, start_column+w*x) == ERR)
101 if (colour != TILE_EMPTY) {
102 mvderwin(fill, 1, 1);
103 wbkgdset(fill, A_REVERSE|attr|ch);
110 wattrset(border, attr);
111 wborder(border, bc, bc, bc, bc, bc, bc, bc, bc);
114 wnoutrefresh(border);
118 redraw_tile(WINDOW **win, unsigned x, unsigned y, unsigned start_column,
119 uint_least32_t *gp, unsigned selected)
121 unsigned tile = board_tile(gp, 5*y+x);
123 assert(tile < TILE_MAX);
124 draw_tile(win, tile, selected, x, y, start_column);
128 static void redraw_area_border(WINDOW **win, unsigned x, unsigned sz)
130 int w, h, tr = 0, rs = 0, br = 0, bs = 0, bl = 0;
131 WINDOW *area = win[PLAYWIN_AREA];
133 getmaxyx(stdscr, h, w);
135 if (h <= GAME_YPOS+1) {
136 bl = ACS_ULCORNER, br = ACS_URCORNER;
137 } else if (h <= 3*sz+GAME_YPOS+1) {
138 bl = br = ACS_VLINE, bs = ' ';
142 tr = ACS_ULCORNER, br = ACS_LLCORNER;
143 } else if (w <= 6*sz+x+2) {
144 tr = ACS_HLINE, rs = ' ';
145 br = br ? ' ' : ACS_HLINE;
148 wborder(area, 0, rs, 0, bs, 0, tr, bl, br);
152 static void curs_redraw_game(struct app_state *state, uint_fast32_t mask)
154 uint_least32_t buf[3], *gp = state->board.game;
158 redraw_area_border(state->gamewin, 2, 5);
160 if (state->view_goal_on_game)
161 gp = game_overlay_goal(&state->board, buf);
163 for (i = 0; i < 25; i++) {
165 redraw_tile(state->gamewin, i%5, i/5,
166 4, gp, i == state->cursor);
172 static void curs_redraw_goal(struct app_state *state, uint_fast32_t mask)
174 uint_least32_t gp[3] = {
175 state->board.goal[0],
176 state->board.goal[1],
181 if (!state->goalwin[PLAYWIN_AREA])
184 getbegyx(state->goalwin[PLAYWIN_AREA], y, x);
186 redraw_area_border(state->goalwin, x, 3);
188 for (i = 0; i < 9; i++) {
190 redraw_tile(state->goalwin, i%3, i/3, x+2, gp, 0);
196 /* Thin wrapper around wresize which returns ERR if support is unavailable. */
197 static int do_wresize(WINDOW *window, int h, int w)
199 #if HAVE_CURSES_WRESIZE
200 return wresize(window, h, w);
205 static WINDOW *realloc_area(WINDOW **orig, int h, int w, int y, int x)
210 if (do_wresize(win, h, w) != ERR) {
219 return *orig = subwin(stdscr, h, w, y, x);
223 static void realloc_tiles(WINDOW **win, int h)
225 WINDOW *border = win[PLAYWIN_TILEBORDER], *fill = win[PLAYWIN_TILEFILL];
228 if (fill && border) {
231 if (do_wresize(fill, h-2, w-2) != ERR
232 && do_wresize(border, h, w) != ERR)
235 getmaxyx(border, old_h, old_w);
245 win[PLAYWIN_TILEBORDER] = border = newwin(h, w, 0, 0);
246 win[PLAYWIN_TILEFILL] = derwin(border, h-2, w-2, 1, 1);
249 static void setup_mainwin(struct app_state *state)
251 int w, h, gamesz, goalsz, scr_w, scr_h, split;
253 getmaxyx(stdscr, scr_h, scr_w);
255 /* First try to fit the game tiles based on window height. */
256 gamesz = MAX(3, (scr_h - 4) / 5);
258 /* Adjust downward until we can fit smallest possible goal area. */
259 for (; split = 5+10*gamesz, gamesz > 3; gamesz--) {
260 if (split + 20 < scr_w)
264 /* Pick a goal size that will fit in the remaining area */
265 goalsz = MAX(3, (scr_w - split - 4) / 6);
266 if (goalsz >= gamesz)
267 goalsz = MAX(3, gamesz - 1);
269 realloc_tiles(state->gamewin, gamesz);
270 realloc_tiles(state->goalwin, goalsz);
272 /* Frame for game area */
273 w = MIN(scr_w-2, 3+10*gamesz);
274 h = MIN(scr_h-GAME_YPOS, 2+5*gamesz);
275 realloc_area(&state->gamewin[PLAYWIN_AREA], h, w, GAME_YPOS, 2);
277 /* Frame for goal area */
278 w = MIN(scr_w-split, 3+6*goalsz);
279 h = MIN(scr_h-GAME_YPOS, 2+3*goalsz);
280 realloc_area(&state->goalwin[PLAYWIN_AREA], h, w, GAME_YPOS, split);
283 w = MAX(0, scr_w-split-1);
284 realloc_area(&state->timer, 1, w, GAME_YPOS+h, split+1);
287 realloc_area(&state->toolbar, 1, scr_w, scr_h-1, 0);
288 curs_draw_toolbar(state);
291 static void app_initialize(int argc, char **argv)
293 int enable_mouse = 1;
296 XTRA_PACKED_LOPTS(lopts);
301 while ((opt = getopt_long(argc, argv, SOPT_STRING, lopts, 0)) != -1) {
321 game_reset(&state.board);
329 keypad(stdscr, TRUE);
332 * While we only care about a subset of these events, for
333 * some reason with ncurses failing to enable all of them
334 * causes timeout to stop working when disabled buttons are
335 * pressed (or released).
337 * It is not known if other curses have this problem; at least
338 * pdcurses does not, but the extra events should be harmless
341 #if HAVE_CURSES_MOUSE_SUPPORT
342 unsigned long mask = BUTTON1_PRESSED | BUTTON1_RELEASED
343 | BUTTON2_PRESSED | BUTTON2_RELEASED
344 | BUTTON3_PRESSED | BUTTON3_RELEASED
345 #ifdef BUTTON4_PRESSED
346 | BUTTON4_PRESSED | BUTTON4_RELEASED
348 #ifdef BUTTON5_PRESSED
349 | BUTTON5_PRESSED | BUTTON5_RELEASED
352 #if HAVE_CURSES_MOUSE_SET
354 #elif HAVE_CURSES_MOUSEMASK
355 mousemask(mask, NULL);
357 #if HAVE_CURSES_MOUSEINTERVAL
360 #endif /* HAVE_CURSES_MOUSE_SUPPORT */
365 init_pair(TILE_RED, COLOR_RED, COLOR_BLACK);
366 init_pair(TILE_ORANGE, COLOR_YELLOW, COLOR_BLACK);
367 init_pair(TILE_YELLOW, COLOR_YELLOW, COLOR_BLACK);
368 init_pair(TILE_GREEN, COLOR_GREEN, COLOR_BLACK);
369 init_pair(TILE_BLUE, COLOR_BLUE, COLOR_BLACK);
370 init_pair(TILE_WHITE, COLOR_WHITE, COLOR_BLACK);
371 init_pair(RR_COLOUR_SHADOW, COLOR_BLACK, COLOR_BLACK);
372 init_pair(RR_COLOUR_TOOLBAR, COLOR_CYAN, COLOR_BLACK);
374 setup_mainwin(&state);
378 static void update_timer(struct app_state *state, uint_fast32_t ms)
382 state->timer_ms = ms;
383 sec = ms / 1000; ms %= 1000;
384 min = sec / 60; sec %= 60;
385 mvwprintw(state->timer, 0, 0, "Time: %u:%.2u.%.3u",
386 min, sec, (unsigned)ms);
387 wclrtoeol(state->timer);
388 wnoutrefresh(state->timer);
391 static uint_fast32_t do_move(struct app_state *state, int x, int y)
395 if ((mask = game_do_move(&state->board, x, y)) != 0) {
396 uint_fast32_t goal = game_check_goal(&state->board);
398 if (state->view_goal_on_game) {
399 state->view_goal_on_game = 0;
405 update_timer(state, game_finish(&state->board));
411 curs_redraw_game(state, mask);
418 static void do_reset_cursor(struct app_state *state)
420 state->cursor = 5*state->board.y + state->board.x;
423 void curs_new_game(struct app_state *state)
425 game_reset(&state->board);
427 do_reset_cursor(state);
428 state->view_goal_on_game = 0;
429 curs_redraw_game(state, -1);
430 curs_redraw_goal(state, -1);
431 update_timer(state, 0);
435 game_begin(&state->board);
438 #if HAVE_CURSES_MOUSE_SUPPORT
440 * Given x, y as screen coordinates, record which (if any) toolbar function
441 * label is at that position, to be performed later.
443 * If no function is indicated, returns zero. Otherwise, returns non-zero.
445 static int press_toolbar(struct app_state *state, int x, int y)
447 return state->toolbar_click = curs_toolbar_mouse_func(state, x, y);
451 * Given x, y as screen coordinates, perform the toolbar action.
453 * Perform the action previously recorded by press_toolbar, if and only if
454 * the x, y screen coordinates correspond to the same function.
456 static void release_toolbar(struct app_state *state, int x, int y)
458 int func = curs_toolbar_mouse_func(state, x, y);
460 if (func && state->toolbar_click == func) {
461 curs_execute_function(state, func);
464 state->toolbar_click = 0;
468 * Given x, y as screen coordinates, determine which (if any) game tile is
471 * If there is no such tile, performs no action and returns 0.
473 * Otherwise, attempts to move that tile and returns non-zero.
475 static int press_tile(struct app_state *state, int x, int y)
477 int game_x, game_y, tile_w, tile_h;
478 uint_fast32_t cursor_mask, move_mask;
480 getbegyx(state->gamewin[PLAYWIN_AREA], game_y, game_x);
481 getmaxyx(state->gamewin[PLAYWIN_TILEBORDER], tile_h, tile_w);
482 tile_w += tile_w & 1;
484 /* special case the left spacer column */
488 if (x < game_x+2 || (x -= game_x+2)/5 >= tile_w)
490 if (y < game_y+1 || (y -= game_y+1)/5 >= tile_h)
493 /* OK, selected a tile. */
497 /* Disable the keyboard cursor due to mouse action */
498 cursor_mask = state->cursor < 0 ? -1 : 1ul << state->cursor;
501 move_mask = do_move(state, x, y);
502 if ((cursor_mask & move_mask) == 0) {
503 curs_redraw_game(state, cursor_mask);
510 static void do_mouse(struct app_state *state)
512 unsigned long bstate;
515 #if HAVE_CURSES_GETMOUSE_NCURSES
518 if (getmouse(&mev) == ERR)
521 x = mev.x, y = mev.y;
523 #elif HAVE_CURSES_REQUEST_MOUSE_POS
530 #define set_bstate_helper(button) do { if (BUTTON_CHANGED(button)) \
531 switch (BUTTON_STATUS(button)) { \
532 case BUTTON_RELEASED: bstate |= BUTTON ## button ## _RELEASED; break; \
533 case BUTTON_PRESSED: bstate |= BUTTON ## button ## _PRESSED; break; \
537 set_bstate_helper(1);
538 set_bstate_helper(3);
540 if (bstate & BUTTON3_PRESSED) {
541 state->view_goal_on_game = 1;
542 curs_redraw_game(state, game_check_goal(&state->board));
546 if (bstate & BUTTON3_RELEASED) {
547 state->view_goal_on_game = 0;
548 curs_redraw_game(state, game_check_goal(&state->board));
552 /* Ignore button1 if holding button3 to view goal */
553 if (state->view_goal_on_game & 1)
556 if (bstate & BUTTON1_PRESSED) {
557 if (press_toolbar(state, x, y));
558 else if (press_tile(state, x, y));
561 if (bstate & BUTTON1_RELEASED) {
562 release_toolbar(state, x, y);
565 #endif /* HAVE_CURSES_MOUSE_SUPPORT */
567 static void do_move_cursor(struct app_state *state, int c)
569 uint_fast32_t mask = 0;
571 if (state->cursor < 0) {
572 /* Cursor was hidden; reset it */
573 do_reset_cursor(state);
575 mask = 1ul << state->cursor;
578 if (state->view_goal_on_game) {
579 state->view_goal_on_game = 0;
580 mask |= game_check_goal(&state->board);
585 if ((state->cursor -= 5) < 0)
589 if ((state->cursor += 5) >= 25)
593 if ((state->cursor -= 1) % 5 == 4 || state->cursor < 0)
597 if ((state->cursor += 1) % 5 == 0)
602 curs_redraw_game(state, mask | 1ul << state->cursor);
606 static void do_keystroke(struct app_state *state, int c)
608 int last_input = state->last_input;
609 state->last_input = c;
612 case KEY_DOWN: case KEY_UP: case KEY_LEFT: case KEY_RIGHT:
613 do_move_cursor(state, c);
616 state->view_goal_on_game ^= 2u;
617 curs_redraw_game(state, game_check_goal(&state->board));
621 if (!(state->view_goal_on_game & 1) && state->cursor >= 0)
622 do_move(state, state->cursor%5, state->cursor/5);
627 if (last_input == '\33' && c >= '0' && c <= '9') {
628 curs_execute_function(state, (c -= '0') == 0 ? 10 : c);
632 if (c >= KEY_F(1) && c <= KEY_F(10)) {
633 curs_execute_function(state, c - KEY_F0);
637 /* One iteration of main input loop */
638 void do_mainloop(struct app_state *state)
645 setup_mainwin(state);
648 curs_redraw_game(state, -1);
649 curs_redraw_goal(state, -1);
650 curs_draw_toolbar(state);
651 update_timer(state, state->timer_ms);
655 #if HAVE_CURSES_MOUSE_SUPPORT
661 do_keystroke(state, c);
665 if (state->board.x <= 4) {
666 update_timer(state, game_elapsed(&state->board));
671 int main(int argc, char **argv)
673 setlocale(LC_ALL, "");
674 app_initialize(argc, argv);
676 curs_new_game(&state);