2 * Curses UI for slide puzzle game
3 * Copyright © 2022 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/>.
30 #include "cursesopt.h"
33 GAME_YPOS = 1 // top row of game and goal areas.
36 static const char *progname = "rrace";
37 static const struct option lopts[] = { LOPTS_INITIALIZER, {0} };
39 static struct app_state state;
41 static void print_version(void)
43 version_print_head("rrace-curses", stdout);
44 puts("License GPLv3+: GNU GPL version 3 or any later version");
45 puts("This is free software: you are free to change and redistribute it.");
46 puts("There is NO WARRANTY, to the extent permitted by law.");
49 static void print_usage(FILE *f)
51 fprintf(f, "Usage: %s [options]\n", progname);
53 fprintf(f, "Try %s --help for more information.\n", progname);
56 static void print_help(void)
58 struct lopt_help help = {0};
59 const struct option *opt;
65 for (opt = lopts; opt->name; opt++) {
66 if (!lopt_get_help(opt, &help))
68 help_print_option(opt, help.arg, help.desc, 20);
72 printf("Report bugs to <%s>.\n", PACKAGE_BUGREPORT);
75 static void draw_tile(WINDOW **win, unsigned colour, unsigned selected,
76 unsigned x, unsigned y, unsigned start_column)
78 WINDOW *border = win[PLAYWIN_TILEBORDER], *fill = win[PLAYWIN_TILEFILL];
79 int w, h, attr, ch, bc = selected ? '#' : 0;
81 assert(colour < TILE_MAX);
82 attr = COLOR_PAIR(colour);
84 case TILE_RED: ch = 'X'; break;
85 case TILE_ORANGE: ch = '|'; break;
86 case TILE_GREEN: ch = '+'; break;
87 case TILE_YELLOW: ch = '~'; attr |= A_BOLD; break;
88 case TILE_BLUE: ch = 'o'; attr |= A_BOLD; break;
89 case TILE_WHITE: ch = '.'; attr |= A_BOLD; break;
91 case TILE_EMPTY: attr = A_BOLD|COLOR_PAIR(RR_COLOUR_SHADOW);
94 getmaxyx(border, h, w);
97 if (mvwin(border, 1+GAME_YPOS+h*y, start_column+w*x) == ERR)
100 if (colour != TILE_EMPTY) {
101 mvderwin(fill, 1, 1);
102 wbkgdset(fill, A_REVERSE|attr|ch);
109 wattrset(border, attr);
110 wborder(border, bc, bc, bc, bc, bc, bc, bc, bc);
113 wnoutrefresh(border);
117 redraw_tile(WINDOW **win, unsigned x, unsigned y, unsigned start_column,
118 uint_fast32_t bit0, uint_fast32_t bit1, uint_fast32_t bit2,
121 uint_fast32_t pos = board_position(x, y);
122 unsigned char tile = 0;
124 if (bit0 & pos) tile |= 1;
125 if (bit1 & pos) tile |= 2;
126 if (bit2 & pos) tile |= 4;
127 assert(tile < TILE_MAX);
129 draw_tile(win, tile, selected, x, y, start_column);
133 static void redraw_area_border(WINDOW **win, unsigned x, unsigned sz)
135 int w, h, tr = 0, rs = 0, br = 0, bs = 0, bl = 0;
136 WINDOW *area = win[PLAYWIN_AREA];
138 getmaxyx(stdscr, h, w);
140 if (h <= GAME_YPOS+1) {
141 bl = ACS_ULCORNER, br = ACS_URCORNER;
142 } else if (h <= 3*sz+GAME_YPOS+1) {
143 bl = br = ACS_VLINE, bs = ' ';
147 tr = ACS_ULCORNER, br = ACS_LLCORNER;
148 } else if (w <= 6*sz+x+2) {
149 tr = ACS_HLINE, rs = ' ';
150 br = br ? ' ' : ACS_HLINE;
153 wborder(area, 0, rs, 0, bs, 0, tr, bl, br);
157 static void curs_redraw_game(struct app_state *state, uint_fast32_t mask)
159 uint_least32_t buf[3], *gp = state->board.game;
163 redraw_area_border(state->gamewin, 2, 5);
165 if (state->view_goal_on_game) {
166 for (i = 0; i < 3; i++) {
167 buf[i] = state->board.goal[i];
168 buf[i] = (gp[i] & ~GOAL_MASK) | (buf[i] << GOAL_SHIFT);
173 for (i = 0; i < 25; i++) {
175 redraw_tile(state->gamewin, i%5, i/5,
176 4, gp[0], gp[1], gp[2],
183 static void curs_redraw_goal(struct app_state *state, uint_fast32_t mask)
185 uint_least16_t *gp = state->board.goal;
188 if (!state->goalwin[PLAYWIN_AREA])
191 getbegyx(state->goalwin[PLAYWIN_AREA], y, x);
193 redraw_area_border(state->goalwin, x, 3);
195 for (i = 0; i < 9; i++) {
197 redraw_tile(state->goalwin, i%3, i/3,
198 x+2, gp[0], gp[1], gp[2], 0);
204 /* Thin wrapper around wresize which returns ERR if support is unavailable. */
205 static int do_wresize(WINDOW *window, int lines, int columns)
207 #if HAVE_CURSES_WRESIZE
208 return wresize(window, lines, columns);
213 static WINDOW *realloc_area(WINDOW **orig, int h, int w, int y, int x)
218 if (do_wresize(win, h, w) != ERR) {
227 return *orig = subwin(stdscr, h, w, y, x);
231 static void realloc_tiles(WINDOW **win, int h)
233 WINDOW *border = win[PLAYWIN_TILEBORDER], *fill = win[PLAYWIN_TILEFILL];
236 if (fill && border) {
239 if (do_wresize(fill, h-2, w-2) != ERR
240 && do_wresize(border, h, w) != ERR)
243 getmaxyx(border, old_h, old_w);
253 win[PLAYWIN_TILEBORDER] = border = newwin(h, w, 0, 0);
254 win[PLAYWIN_TILEFILL] = derwin(border, h-2, w-2, 1, 1);
257 static void setup_mainwin(struct app_state *state)
259 int w, h, gamesz, goalsz, scr_w, scr_h, split;
261 getmaxyx(stdscr, scr_h, scr_w);
263 /* First try to fit the game tiles based on window height. */
264 gamesz = MAX(3, (scr_h - 4) / 5);
266 /* Adjust downward until we can fit smallest possible goal area. */
267 for (; split = 5+10*gamesz, gamesz > 3; gamesz--) {
268 if (split + 20 < scr_w)
272 /* Pick a goal size that will fit in the remaining area */
273 goalsz = MAX(3, (scr_w - split - 4) / 6);
274 if (goalsz >= gamesz)
275 goalsz = MAX(3, gamesz - 1);
277 realloc_tiles(state->gamewin, gamesz);
278 realloc_tiles(state->goalwin, goalsz);
280 /* Frame for game area */
281 w = MIN(scr_w-2, 3+10*gamesz);
282 h = MIN(scr_h-GAME_YPOS, 2+5*gamesz);
283 realloc_area(&state->gamewin[PLAYWIN_AREA], h, w, GAME_YPOS, 2);
285 /* Frame for goal area */
286 w = MIN(scr_w-split, 3+6*goalsz);
287 h = MIN(scr_h-GAME_YPOS, 2+3*goalsz);
288 realloc_area(&state->goalwin[PLAYWIN_AREA], h, w, GAME_YPOS, split);
291 w = MAX(0, scr_w-split-1);
292 realloc_area(&state->timer, 1, w, GAME_YPOS+h, split+1);
295 realloc_area(&state->toolbar, 1, scr_w, scr_h-1, 0);
296 curs_draw_toolbar(state);
299 static void app_initialize(int argc, char **argv)
301 int enable_mouse = 1;
307 while ((opt = getopt_long(argc, argv, SOPT_STRING, lopts, 0)) != -1) {
327 game_reset(&state.board);
335 keypad(stdscr, TRUE);
338 * While we only care about a subset of these events, for
339 * some reason with ncurses failing to enable all of them
340 * causes timeout to stop working when disabled buttons are
341 * pressed (or released).
343 * It is not known if other curses have this problem; at least
344 * pdcurses does not, but the extra events should be harmless
347 #if HAVE_CURSES_MOUSE_SUPPORT
348 unsigned long mask = BUTTON1_PRESSED | BUTTON1_RELEASED
349 | BUTTON2_PRESSED | BUTTON2_RELEASED
350 | BUTTON3_PRESSED | BUTTON3_RELEASED
351 #ifdef BUTTON4_PRESSED
352 | BUTTON4_PRESSED | BUTTON4_RELEASED
354 #ifdef BUTTON5_PRESSED
355 | BUTTON5_PRESSED | BUTTON5_RELEASED
358 #if HAVE_CURSES_MOUSE_SET
360 #elif HAVE_CURSES_MOUSEMASK
361 mousemask(mask, NULL);
363 #if HAVE_CURSES_MOUSEINTERVAL
366 #endif /* HAVE_CURSES_MOUSE_SUPPORT */
371 init_pair(TILE_RED, COLOR_RED, COLOR_BLACK);
372 init_pair(TILE_ORANGE, COLOR_YELLOW, COLOR_BLACK);
373 init_pair(TILE_YELLOW, COLOR_YELLOW, COLOR_BLACK);
374 init_pair(TILE_GREEN, COLOR_GREEN, COLOR_BLACK);
375 init_pair(TILE_BLUE, COLOR_BLUE, COLOR_BLACK);
376 init_pair(TILE_WHITE, COLOR_WHITE, COLOR_BLACK);
377 init_pair(RR_COLOUR_SHADOW, COLOR_BLACK, COLOR_BLACK);
378 init_pair(RR_COLOUR_TOOLBAR, COLOR_CYAN, COLOR_BLACK);
380 setup_mainwin(&state);
384 static void update_timer(struct app_state *state, uint_fast32_t ms)
388 state->timer_ms = ms;
389 sec = ms / 1000; ms %= 1000;
390 min = sec / 60; sec %= 60;
391 mvwprintw(state->timer, 0, 0, "Time: %u:%.2u.%.3u",
392 min, sec, (unsigned)ms);
393 wclrtoeol(state->timer);
394 wnoutrefresh(state->timer);
397 static uint_fast32_t do_move(struct app_state *state, int x, int y)
401 if ((mask = game_do_move(&state->board, x, y)) != 0) {
402 uint_fast32_t goal = game_check_goal(&state->board);
404 if (state->view_goal_on_game) {
405 state->view_goal_on_game = 0;
411 update_timer(state, game_finish(&state->board));
417 curs_redraw_game(state, mask);
424 static void do_reset_cursor(struct app_state *state)
426 state->cursor = 5*state->board.y + state->board.x;
429 void curs_new_game(struct app_state *state)
431 game_reset(&state->board);
433 do_reset_cursor(state);
434 curs_redraw_game(state, -1);
435 curs_redraw_goal(state, -1);
436 update_timer(state, 0);
440 game_begin(&state->board);
443 #if HAVE_CURSES_MOUSE_SUPPORT
445 * Given x, y as screen coordinates, record which (if any) toolbar function
446 * label is at that position, to be performed later.
448 * If no function is indicated, returns zero. Otherwise, returns non-zero.
450 static int press_toolbar(struct app_state *state, int x, int y)
452 return state->toolbar_click = curs_toolbar_mouse_func(state, x, y);
456 * Given x, y as screen coordinates, perform the toolbar action.
458 * Perform the action previously recorded by press_toolbar, if and only if
459 * the x, y screen coordinates correspond to the same function.
461 static void release_toolbar(struct app_state *state, int x, int y)
463 int func = curs_toolbar_mouse_func(state, x, y);
465 if (func && state->toolbar_click == func) {
466 curs_execute_function(state, func);
469 state->toolbar_click = 0;
473 * Given x, y as screen coordinates, determine which (if any) game tile is
476 * If there is no such tile, performs no action and returns 0.
478 * Otherwise, attempts to move that tile and returns non-zero.
480 static int press_tile(struct app_state *state, int x, int y)
482 int game_x, game_y, tile_w, tile_h;
483 uint_fast32_t cursor_mask, move_mask;
485 getbegyx(state->gamewin[PLAYWIN_AREA], game_y, game_x);
486 getmaxyx(state->gamewin[PLAYWIN_TILEBORDER], tile_h, tile_w);
487 tile_w += tile_w & 1;
489 /* special case the left spacer column */
493 if (x < game_x+2 || (x -= game_x+2)/5 >= tile_w)
495 if (y < game_y+1 || (y -= game_y+1)/5 >= tile_h)
498 /* OK, selected a tile. */
502 /* Disable the keyboard cursor due to mouse action */
503 cursor_mask = state->cursor < 0 ? -1 : 1ul << state->cursor;
506 move_mask = do_move(state, x, y);
507 if ((cursor_mask & move_mask) == 0) {
508 curs_redraw_game(state, cursor_mask);
515 static void do_mouse(struct app_state *state)
517 unsigned long bstate;
520 #if HAVE_CURSES_GETMOUSE_NCURSES
523 if (getmouse(&mev) == ERR)
526 x = mev.x, y = mev.y;
528 #elif HAVE_CURSES_REQUEST_MOUSE_POS
535 #define set_bstate_helper(button) do { if (BUTTON_CHANGED(button)) \
536 switch (BUTTON_STATUS(button)) { \
537 case BUTTON_RELEASED: bstate |= BUTTON ## button ## _RELEASED; break; \
538 case BUTTON_PRESSED: bstate |= BUTTON ## button ## _PRESSED; break; \
542 set_bstate_helper(1);
543 set_bstate_helper(3);
545 if (bstate & BUTTON3_PRESSED) {
546 state->view_goal_on_game = 1;
547 curs_redraw_game(state, game_check_goal(&state->board));
551 if (bstate & BUTTON3_RELEASED) {
552 state->view_goal_on_game = 0;
553 curs_redraw_game(state, game_check_goal(&state->board));
557 /* Ignore button1 if holding button3 to view goal */
558 if (state->view_goal_on_game & 1)
561 if (bstate & BUTTON1_PRESSED) {
562 if (press_toolbar(state, x, y));
563 else if (press_tile(state, x, y));
566 if (bstate & BUTTON1_RELEASED) {
567 release_toolbar(state, x, y);
570 #endif /* HAVE_CURSES_MOUSE_SUPPORT */
572 static void do_move_cursor(struct app_state *state, int c)
574 uint_fast32_t mask = 0;
576 if (state->cursor < 0) {
577 /* Cursor was hidden; reset it */
578 do_reset_cursor(state);
580 mask = 1ul << state->cursor;
583 if (state->view_goal_on_game) {
584 state->view_goal_on_game = 0;
585 mask |= game_check_goal(&state->board);
590 if ((state->cursor -= 5) < 0)
594 if ((state->cursor += 5) >= 25)
598 if ((state->cursor -= 1) % 5 == 4 || state->cursor < 0)
602 if ((state->cursor += 1) % 5 == 0)
607 curs_redraw_game(state, mask | 1ul << state->cursor);
611 static void do_keystroke(struct app_state *state, int c)
613 int last_input = state->last_input;
614 state->last_input = c;
617 case KEY_DOWN: case KEY_UP: case KEY_LEFT: case KEY_RIGHT:
618 do_move_cursor(state, c);
621 state->view_goal_on_game ^= 2u;
622 curs_redraw_game(state, game_check_goal(&state->board));
626 if (!(state->view_goal_on_game & 1) && state->cursor >= 0)
627 do_move(state, state->cursor%5, state->cursor/5);
632 if (last_input == '\33' && c >= '0' && c <= '9') {
633 curs_execute_function(state, (c -= '0') == 0 ? 10 : c);
637 if (c >= KEY_F(1) && c <= KEY_F(10)) {
638 curs_execute_function(state, c - KEY_F0);
642 /* One iteration of main input loop */
643 void do_mainloop(struct app_state *state)
650 setup_mainwin(state);
653 curs_redraw_game(state, -1);
654 curs_redraw_goal(state, -1);
655 curs_draw_toolbar(state);
656 update_timer(state, state->timer_ms);
660 #if HAVE_CURSES_MOUSE_SUPPORT
666 do_keystroke(state, c);
670 if (state->board.x <= 4) {
671 update_timer(state, game_elapsed(&state->board));
676 int main(int argc, char **argv)
678 setlocale(LC_ALL, "");
679 app_initialize(argc, argv);
681 curs_new_game(&state);