src/motif.c

   1 /*
   2  * X11 GUI for slide puzzle game
   3  * Copyright © 2022-2024 Nick Bowler
   4  *
   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.
   9  *
  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.
  14  *
  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/>.
  17  */
  18
  19 #include <config.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <locale.h>
  23 #include <getopt.h>
  24
  25 #include <Xm/XmAll.h>
  26
  27 #include "help.h"
  28 #include "xtra.h"
  29 #include "motif.h"
  30 #include "ewmhicon.h"
  31 #include "motifopt.h"
  32 #include "game.h"
  33 #include "version.h"
  34
  35 #define TIMER_UPDATE_MS 33
  36
  37 #define SPLIT_NUMERATOR    75
  38 #define SPLIT_DENOMINATOR 100
  39
  40 #define MIN(a, b) ((a) < (b) ? (a) : (b))
  41
  42 #define PROGNAME "rrace"
  43 static const char *progname = PROGNAME;
  44
  45 static char * const default_resources[] = {
  46         "*title: RRace",
  47         "*game.height: 371", /* 365 + 2*shadowThickness */
  48         "*game.width: 498",
  49
  50         "*game.XmFrame.shadowThickness: 3",
  51         "*game.XmFrame.shadowType: shadow_in",
  52         "*goalArea.leftOffset: 1",
  53
  54         "*gameNew.accelerator: Ctrl<Key>N",
  55         "*gameNew.acceleratorText: Ctrl+N",
  56         "*gameExit.accelerator: Ctrl<Key>Q",
  57         "*gameExit.acceleratorText: Ctrl+Q",
  58
  59         "*aboutDialog*pixmapTextPadding: 10",
  60
  61         NULL
  62 };
  63
  64 static void print_version(void)
  65 {
  66         version_print_head("rrace-motif", stdout);
  67         puts("License GPLv3+: GNU GPL version 3 or any later version");
  68         puts("This is free software: you are free to change and redistribute it.");
  69         puts("There is NO WARRANTY, to the extent permitted by law.");
  70 }
  71
  72 static void print_usage(FILE *f)
  73 {
  74         fprintf(f, "Usage: %s [options]\n", progname);
  75         if (f != stdout)
  76                 fprintf(f, "Try %s --help for more information.\n", progname);
  77 }
  78
  79 static void print_help(const struct option *lopts)
  80 {
  81         struct lopt_help help = {0};
  82         const struct option *opt;
  83
  84         print_usage(stdout);
  85
  86         putchar('\n');
  87         puts("Options:");
  88         for (opt = lopts; opt->name; opt++) {
  89                 if (!lopt_get_help(opt, &help))
  90                         continue;
  91                 help_print_option(opt, help.arg, help.desc, 20);
  92         }
  93         putchar('\n');
  94
  95         printf("Report bugs to <%s>.\n", PACKAGE_BUGREPORT);
  96 }
  97
  98 static Widget early_setup(XtAppContext *app, int argc, char **argv)
  99 {
 100         Widget shell;
 101         int opt;
 102
 103         XTRA_PACKED_LOPTS(lopts);
 104
 105         /* Check for --help/--version early (before X connection) */
 106         opterr = 0;
 107         while ((opt = getopt_long_only(argc, argv, "", lopts, NULL)) != -1) {
 108                 switch (opt) {
 109                 case LOPT_VERSION:
 110                         print_version();
 111                         exit(EXIT_SUCCESS);
 112                 case LOPT_HELP:
 113                         print_help(lopts);
 114                         exit(EXIT_SUCCESS);
 115                 }
 116         }
 117
 118         shell = XtOpenApplication(app, PACKAGE_TARNAME, NULL, 0,
 119                                   &argc, argv, (String *)default_resources,
 120                                   sessionShellWidgetClass, NULL, 0);
 121
 122         opterr = optind = 1;
 123         while ((opt = getopt_long_only(argc, argv, "", lopts, NULL)) != -1) {
 124                 switch (opt) {
 125                 default:
 126                         print_usage(stderr);
 127                         exit(EXIT_FAILURE);
 128                 }
 129         }
 130
 131         if (argv[optind]) {
 132                 fprintf(stderr, "%s: excess command-line arguments.\n",
 133                                 progname);
 134                 print_usage(stderr);
 135                 exit(EXIT_FAILURE);
 136         }
 137
 138         return shell;
 139 }
 140
 141 static void timer_tick(void *data, XtIntervalId *id)
 142 {
 143         struct app_state *state = data;
 144         XtAppContext app;
 145
 146         if (state->board.x > 4) {
 147                 /* Game is over */
 148                 state->flags &= ~FLAG_TIMER_RUNNING;
 149                 return;
 150         }
 151
 152         ui_timer_update(state, game_elapsed(&state->board));
 153         app = XtWidgetToApplicationContext(state->game);
 154         XtAppAddTimeOut(app, TIMER_UPDATE_MS, timer_tick, state);
 155 }
 156
 157 static void do_input_move(struct app_state *state, int x, int y)
 158 {
 159         uint_fast32_t mask;
 160
 161         if ((mask = game_do_move(&state->board, x, y)) != 0) {
 162                 if (game_check_goal(&state->board) == 0) {
 163                         ui_timer_update(state, game_finish(&state->board));
 164                         mask |= ~GOAL_MASK;
 165                 }
 166
 167                 x11_redraw_game(state, mask);
 168         }
 169 }
 170
 171 static void set_view_goal(struct app_state *state, int view_goal)
 172 {
 173         state->flags &= ~FLAG_VIEW_GOAL_ON_GAME;
 174         state->flags |= view_goal ? FLAG_VIEW_GOAL_ON_GAME : 0;
 175
 176         x11_redraw_game(state, game_check_goal(&state->board));
 177 }
 178
 179 static void game_input(Widget w, void *data, void *cb_data)
 180 {
 181         XmDrawingAreaCallbackStruct *cbs = cb_data;
 182         XButtonEvent *b = &cbs->event->xbutton;
 183         struct app_state *state = data;
 184
 185         switch (cbs->event->type) {
 186         case ButtonPress:
 187                 switch (b->button) {
 188                 case Button1:
 189                         if (b->state & Button3Mask)
 190                                 break;
 191
 192                         do_input_move(state, b->x / state->game_tile_sz,
 193                                              b->y / state->game_tile_sz);
 194                         break;
 195                 case Button3:
 196                         set_view_goal(state, 1);
 197                         break;
 198                 }
 199                 break;
 200         case ButtonRelease:
 201                 switch (b->button) {
 202                 case Button3:
 203                         set_view_goal(state, 0);
 204                         break;
 205                 }
 206         }
 207 }
 208
 209 static struct app_state state;
 210
 211 static Widget get_shell(Widget w)
 212 {
 213         Widget shell;
 214
 215         for (shell = w; !XtIsWMShell(shell);)
 216                 shell = XtParent(shell);
 217
 218         return shell;
 219 }
 220
 221 static void proc_exit(Widget w, XEvent *e, String *argv, Cardinal *argc)
 222 {
 223         XtAppSetExitFlag(XtWidgetToApplicationContext(w));
 224 }
 225
 226 static void proc_new_game(Widget w, XEvent *e, String *argv, Cardinal *argc)
 227 {
 228         XtAppContext app;
 229
 230         game_reset(&state.board);
 231
 232         state.flags &= ~FLAG_VIEW_GOAL_ON_GAME;
 233         x11_redraw_goal(&state, -1, get_shell(w));
 234         x11_redraw_game(&state, -1);
 235
 236         game_begin(&state.board);
 237         if (!(state.flags & FLAG_TIMER_RUNNING)) {
 238                 state.flags |= FLAG_TIMER_RUNNING;
 239                 timer_tick(&state, 0);
 240         }
 241 }
 242
 243 static void proc_about(Widget w, XEvent *e, String *argv, Cardinal *argc)
 244 {
 245         ui_show_about(&state, get_shell(w));
 246 }
 247
 248 static void proc_resize(Widget form, XEvent *e, String *argv, Cardinal *argc)
 249 {
 250         Widget game = XtParent(state.game);
 251         Widget goal = XtParent(state.goal);
 252         Dimension w, h, gamesz, gameborder, goalsz, goalborder;
 253         int x, y, gap;
 254
 255         XtVaGetValues(form, XmNwidth, &w, XmNheight, &h, (char *)NULL);
 256         XtVaGetValues(game, XmNshadowThickness, &gameborder, (char *)NULL);
 257         XtVaGetValues(goal, XmNshadowThickness, &goalborder,
 258                             XmNleftOffset, &gap,
 259                             (char *)NULL);
 260
 261         gamesz = MIN(h, w * SPLIT_NUMERATOR / SPLIT_DENOMINATOR);
 262         state.game_tile_sz = (gamesz - 2*gameborder) / 5;
 263         gamesz = 5*state.game_tile_sz + 2*gameborder;
 264
 265         goalsz = MIN(gamesz*3/5, w - gamesz - gap);
 266         state.goal_tile_sz = (goalsz - 2*goalborder) / 3;
 267         goalsz = 3*state.goal_tile_sz + 2*goalborder;
 268
 269         x = (w - gamesz - goalsz - gap) / 2;
 270         if (x < 2) x = 0;
 271
 272         y = (h - gamesz) / 2;
 273         if (y < 3) y = 0;
 274
 275         XtVaSetValues(game, XmNleftOffset, x, XmNtopOffset, y, (char *)NULL);
 276         XtVaSetValues(game, XmNwidth, gamesz, XmNheight, gamesz, (char *)NULL);
 277         XtVaSetValues(goal, XmNwidth, goalsz, XmNheight, goalsz, (char *)NULL);
 278 }
 279
 280 static const XtActionsRec app_actions[] = {
 281         { "gameNew", proc_new_game },
 282         { "gameExit", proc_exit },
 283         { "helpAbout", proc_about },
 284
 285         { "ResizeGameArea", proc_resize }
 286 };
 287
 288 static XtAppContext app_initialize(int argc, char **argv)
 289 {
 290         XtAppContext app;
 291         Widget shell;
 292         int i;
 293
 294         if (argc > 0)
 295                 progname = argv[0];
 296
 297         shell = early_setup(&app, argc, argv);
 298         XtAppAddActions(app, (void *)app_actions, XtNumber(app_actions));
 299         ui_initialize(&state, shell);
 300         x11_initialize(&state, shell);
 301
 302         XtAddCallback(state.game, XmNinputCallback, game_input, &state);
 303
 304         /* Begin with the game in winning state */
 305         game_reset(&state.board);
 306         for (i = 0; i < 3; i++)
 307                 state.board.game[i] = state.board.goal[i] << GOAL_SHIFT;
 308         game_finish(&state.board);
 309
 310         state.flags = ewmh_probe_wm_icon(shell);
 311         XtRealizeWidget(shell);
 312
 313         x11_redraw_goal(&state, 0, shell);
 314
 315         return app;
 316 }
 317
 318 int main(int argc, char **argv)
 319 {
 320         setlocale(LC_ALL, "");
 321         XtAppMainLoop(app_initialize(argc, argv));
 322         return 0;
 323 }