windows.c

   1 /*
   2  * windows.c: Windows front end for my puzzle collection.
   3  */
   4
   5 #include <windows.h>
   6 #include <commctrl.h>
   7
   8 #include <stdio.h>
   9 #include <assert.h>
  10 #include <ctype.h>
  11 #include <stdarg.h>
  12 #include <stdlib.h>
  13 #include <limits.h>
  14 #include <time.h>
  15
  16 #include "puzzles.h"
  17
  18 #define IDM_NEW       0x0010
  19 #define IDM_RESTART   0x0020
  20 #define IDM_UNDO      0x0030
  21 #define IDM_REDO      0x0040
  22 #define IDM_COPY      0x0050
  23 #define IDM_SOLVE     0x0060
  24 #define IDM_QUIT      0x0070
  25 #define IDM_CONFIG    0x0080
  26 #define IDM_DESC      0x0090
  27 #define IDM_SEED      0x00A0
  28 #define IDM_HELPC     0x00B0
  29 #define IDM_GAMEHELP  0x00C0
  30 #define IDM_ABOUT     0x00D0
  31 #define IDM_SAVE      0x00E0
  32 #define IDM_LOAD      0x00F0
  33 #define IDM_PRESETS   0x0100
  34
  35 #define HELP_FILE_NAME  "puzzles.hlp"
  36 #define HELP_CNT_NAME   "puzzles.cnt"
  37
  38 #ifdef DEBUGGING
  39 static FILE *debug_fp = NULL;
  40 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
  41 static int debug_got_console = 0;
  42
  43 void dputs(char *buf)
  44 {
  45     DWORD dw;
  46
  47     if (!debug_got_console) {
  48         if (AllocConsole()) {
  49             debug_got_console = 1;
  50             debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
  51         }
  52     }
  53     if (!debug_fp) {
  54         debug_fp = fopen("debug.log", "w");
  55     }
  56
  57     if (debug_hdl != INVALID_HANDLE_VALUE) {
  58         WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
  59     }
  60     fputs(buf, debug_fp);
  61     fflush(debug_fp);
  62 }
  63
  64 void debug_printf(char *fmt, ...)
  65 {
  66     char buf[4096];
  67     va_list ap;
  68
  69     va_start(ap, fmt);
  70     vsprintf(buf, fmt, ap);
  71     dputs(buf);
  72     va_end(ap);
  73 }
  74 #endif
  75
  76 struct font {
  77     HFONT font;
  78     int type;
  79     int size;
  80 };
  81
  82 struct cfg_aux {
  83     int ctlid;
  84 };
  85
  86 struct blitter {
  87     HBITMAP bitmap;
  88     frontend *fe;
  89     int x, y, w, h;
  90 };
  91
  92 struct frontend {
  93     midend_data *me;
  94     HWND hwnd, statusbar, cfgbox;
  95     HINSTANCE inst;
  96     HBITMAP bitmap, prevbm;
  97     HDC hdc_bm;
  98     COLORREF *colours;
  99     HBRUSH *brushes;
 100     HPEN *pens;
 101     HRGN clip;
 102     UINT timer;
 103     DWORD timer_last_tickcount;
 104     int npresets;
 105     game_params **presets;
 106     struct font *fonts;
 107     int nfonts, fontsize;
 108     config_item *cfg;
 109     struct cfg_aux *cfgaux;
 110     int cfg_which, dlg_done;
 111     HFONT cfgfont;
 112     char *help_path;
 113     int help_has_contents;
 114     char *laststatus;
 115 };
 116
 117 void fatal(char *fmt, ...)
 118 {
 119     char buf[2048];
 120     va_list ap;
 121
 122     va_start(ap, fmt);
 123     vsprintf(buf, fmt, ap);
 124     va_end(ap);
 125
 126     MessageBox(NULL, buf, "Fatal error", MB_ICONEXCLAMATION | MB_OK);
 127
 128     exit(1);
 129 }
 130
 131 void get_random_seed(void **randseed, int *randseedsize)
 132 {
 133     time_t *tp = snew(time_t);
 134     time(tp);
 135     *randseed = (void *)tp;
 136     *randseedsize = sizeof(time_t);
 137 }
 138
 139 void status_bar(frontend *fe, char *text)
 140 {
 141     char *rewritten = midend_rewrite_statusbar(fe->me, text);
 142     if (!fe->laststatus || strcmp(rewritten, fe->laststatus)) {
 143         SetWindowText(fe->statusbar, rewritten);
 144         sfree(fe->laststatus);
 145         fe->laststatus = rewritten;
 146     } else {
 147         sfree(rewritten);
 148     }
 149 }
 150
 151 blitter *blitter_new(int w, int h)
 152 {
 153     blitter *bl = snew(blitter);
 154
 155     memset(bl, 0, sizeof(blitter));
 156     bl->w = w;
 157     bl->h = h;
 158     bl->bitmap = 0;
 159
 160     return bl;
 161 }
 162
 163 void blitter_free(blitter *bl)
 164 {
 165     if (bl->bitmap) DeleteObject(bl->bitmap);
 166     sfree(bl);
 167 }
 168
 169 static void blitter_mkbitmap(frontend *fe, blitter *bl)
 170 {
 171     HDC hdc = GetDC(fe->hwnd);
 172     bl->bitmap = CreateCompatibleBitmap(hdc, bl->w, bl->h);
 173     ReleaseDC(fe->hwnd, hdc);
 174 }
 175
 176 /* BitBlt(dstDC, dstX, dstY, dstW, dstH, srcDC, srcX, srcY, dType) */
 177
 178 void blitter_save(frontend *fe, blitter *bl, int x, int y)
 179 {
 180     HDC hdc_win, hdc_blit;
 181     HBITMAP prev_blit;
 182
 183     if (!bl->bitmap) blitter_mkbitmap(fe, bl);
 184
 185     bl->x = x; bl->y = y;
 186
 187     hdc_win = GetDC(fe->hwnd);
 188     hdc_blit = CreateCompatibleDC(hdc_win);
 189     if (!hdc_blit) fatal("hdc_blit failed: 0x%x", GetLastError());
 190
 191     prev_blit = SelectObject(hdc_blit, bl->bitmap);
 192     if (prev_blit == NULL || prev_blit == HGDI_ERROR)
 193         fatal("SelectObject for hdc_main failed: 0x%x", GetLastError());
 194
 195     if (!BitBlt(hdc_blit, 0, 0, bl->w, bl->h,
 196                 fe->hdc_bm, x, y, SRCCOPY))
 197         fatal("BitBlt failed: 0x%x", GetLastError());
 198
 199     SelectObject(hdc_blit, prev_blit);
 200     DeleteDC(hdc_blit);
 201     ReleaseDC(fe->hwnd, hdc_win);
 202 }
 203
 204 void blitter_load(frontend *fe, blitter *bl, int x, int y)
 205 {
 206     HDC hdc_win, hdc_blit;
 207     HBITMAP prev_blit;
 208
 209     assert(bl->bitmap); /* we should always have saved before loading */
 210
 211     if (x == BLITTER_FROMSAVED) x = bl->x;
 212     if (y == BLITTER_FROMSAVED) y = bl->y;
 213
 214     hdc_win = GetDC(fe->hwnd);
 215     hdc_blit = CreateCompatibleDC(hdc_win);
 216
 217     prev_blit = SelectObject(hdc_blit, bl->bitmap);
 218
 219     BitBlt(fe->hdc_bm, x, y, bl->w, bl->h,
 220            hdc_blit, 0, 0, SRCCOPY);
 221
 222     SelectObject(hdc_blit, prev_blit);
 223     DeleteDC(hdc_blit);
 224     ReleaseDC(fe->hwnd, hdc_win);
 225 }
 226
 227 void frontend_default_colour(frontend *fe, float *output)
 228 {
 229     DWORD c = GetSysColor(COLOR_MENU); /* ick */
 230
 231     output[0] = (float)(GetRValue(c) / 255.0);
 232     output[1] = (float)(GetGValue(c) / 255.0);
 233     output[2] = (float)(GetBValue(c) / 255.0);
 234 }
 235
 236 void clip(frontend *fe, int x, int y, int w, int h)
 237 {
 238     IntersectClipRect(fe->hdc_bm, x, y, x+w, y+h);
 239 }
 240
 241 void unclip(frontend *fe)
 242 {
 243     SelectClipRgn(fe->hdc_bm, NULL);
 244 }
 245
 246 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 247                int align, int colour, char *text)
 248 {
 249     int i;
 250
 251     /*
 252      * Find or create the font.
 253      */
 254     for (i = 0; i < fe->nfonts; i++)
 255         if (fe->fonts[i].type == fonttype && fe->fonts[i].size == fontsize)
 256             break;
 257
 258     if (i == fe->nfonts) {
 259         if (fe->fontsize <= fe->nfonts) {
 260             fe->fontsize = fe->nfonts + 10;
 261             fe->fonts = sresize(fe->fonts, fe->fontsize, struct font);
 262         }
 263
 264         fe->nfonts++;
 265
 266         fe->fonts[i].type = fonttype;
 267         fe->fonts[i].size = fontsize;
 268
 269         fe->fonts[i].font = CreateFont(-fontsize, 0, 0, 0, FW_BOLD,
 270                                        FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 271                                        OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 272                                        DEFAULT_QUALITY,
 273                                        (fonttype == FONT_FIXED ?
 274                                         FIXED_PITCH | FF_DONTCARE :
 275                                         VARIABLE_PITCH | FF_SWISS),
 276                                        NULL);
 277     }
 278
 279     /*
 280      * Position and draw the text.
 281      */
 282     {
 283         HFONT oldfont;
 284         TEXTMETRIC tm;
 285         SIZE size;
 286
 287         oldfont = SelectObject(fe->hdc_bm, fe->fonts[i].font);
 288         if (GetTextMetrics(fe->hdc_bm, &tm)) {
 289             if (align & ALIGN_VCENTRE)
 290                 y -= (tm.tmAscent+tm.tmDescent)/2;
 291             else
 292                 y -= tm.tmAscent;
 293         }
 294         if (GetTextExtentPoint32(fe->hdc_bm, text, strlen(text), &size)) {
 295             if (align & ALIGN_HCENTRE)
 296                 x -= size.cx / 2;
 297             else if (align & ALIGN_HRIGHT)
 298                 x -= size.cx;
 299         }
 300         SetBkMode(fe->hdc_bm, TRANSPARENT);
 301         SetTextColor(fe->hdc_bm, fe->colours[colour]);
 302         TextOut(fe->hdc_bm, x, y, text, strlen(text));
 303         SelectObject(fe->hdc_bm, oldfont);
 304     }
 305 }
 306
 307 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour)
 308 {
 309     if (w == 1 && h == 1) {
 310         /*
 311          * Rectangle() appears to get uppity if asked to draw a 1x1
 312          * rectangle, presumably on the grounds that that's beneath
 313          * its dignity and you ought to be using SetPixel instead.
 314          * So I will.
 315          */
 316         SetPixel(fe->hdc_bm, x, y, fe->colours[colour]);
 317     } else {
 318         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 319         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 320         Rectangle(fe->hdc_bm, x, y, x+w, y+h);
 321         SelectObject(fe->hdc_bm, oldbrush);
 322         SelectObject(fe->hdc_bm, oldpen);
 323     }
 324 }
 325
 326 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour)
 327 {
 328     HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 329     MoveToEx(fe->hdc_bm, x1, y1, NULL);
 330     LineTo(fe->hdc_bm, x2, y2);
 331     SetPixel(fe->hdc_bm, x2, y2, fe->colours[colour]);
 332     SelectObject(fe->hdc_bm, oldpen);
 333 }
 334
 335 void draw_circle(frontend *fe, int cx, int cy, int radius,
 336                  int fillcolour, int outlinecolour)
 337 {
 338     assert(outlinecolour >= 0);
 339
 340     if (fillcolour >= 0) {
 341         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[fillcolour]);
 342         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[outlinecolour]);
 343         Ellipse(fe->hdc_bm, cx - radius, cy - radius,
 344                 cx + radius + 1, cy + radius + 1);
 345         SelectObject(fe->hdc_bm, oldbrush);
 346         SelectObject(fe->hdc_bm, oldpen);
 347     } else {
 348         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[outlinecolour]);
 349         Arc(fe->hdc_bm, cx - radius, cy - radius,
 350             cx + radius + 1, cy + radius + 1,
 351             cx - radius, cy, cx - radius, cy);
 352         SelectObject(fe->hdc_bm, oldpen);
 353     }
 354 }
 355
 356 void draw_polygon(frontend *fe, int *coords, int npoints,
 357                   int fillcolour, int outlinecolour)
 358 {
 359     POINT *pts = snewn(npoints+1, POINT);
 360     int i;
 361
 362     for (i = 0; i <= npoints; i++) {
 363         int j = (i < npoints ? i : 0);
 364         pts[i].x = coords[j*2];
 365         pts[i].y = coords[j*2+1];
 366     }
 367
 368     assert(outlinecolour >= 0);
 369
 370     if (fillcolour >= 0) {
 371         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[fillcolour]);
 372         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[outlinecolour]);
 373         Polygon(fe->hdc_bm, pts, npoints);
 374         SelectObject(fe->hdc_bm, oldbrush);
 375         SelectObject(fe->hdc_bm, oldpen);
 376     } else {
 377         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[outlinecolour]);
 378         Polyline(fe->hdc_bm, pts, npoints+1);
 379         SelectObject(fe->hdc_bm, oldpen);
 380     }
 381
 382     sfree(pts);
 383 }
 384
 385 void start_draw(frontend *fe)
 386 {
 387     HDC hdc_win;
 388     hdc_win = GetDC(fe->hwnd);
 389     fe->hdc_bm = CreateCompatibleDC(hdc_win);
 390     fe->prevbm = SelectObject(fe->hdc_bm, fe->bitmap);
 391     ReleaseDC(fe->hwnd, hdc_win);
 392     fe->clip = NULL;
 393     SetMapMode(fe->hdc_bm, MM_TEXT);
 394 }
 395
 396 void draw_update(frontend *fe, int x, int y, int w, int h)
 397 {
 398     RECT r;
 399
 400     r.left = x;
 401     r.top = y;
 402     r.right = x + w;
 403     r.bottom = y + h;
 404
 405     InvalidateRect(fe->hwnd, &r, FALSE);
 406 }
 407
 408 void end_draw(frontend *fe)
 409 {
 410     SelectObject(fe->hdc_bm, fe->prevbm);
 411     DeleteDC(fe->hdc_bm);
 412     if (fe->clip) {
 413         DeleteObject(fe->clip);
 414         fe->clip = NULL;
 415     }
 416 }
 417
 418 void deactivate_timer(frontend *fe)
 419 {
 420     KillTimer(fe->hwnd, fe->timer);
 421     fe->timer = 0;
 422 }
 423
 424 void activate_timer(frontend *fe)
 425 {
 426     if (!fe->timer) {
 427         fe->timer = SetTimer(fe->hwnd, fe->timer, 20, NULL);
 428         fe->timer_last_tickcount = GetTickCount();
 429     }
 430 }
 431
 432 void write_clip(HWND hwnd, char *data)
 433 {
 434     HGLOBAL clipdata;
 435     int len, i, j;
 436     char *data2;
 437     void *lock;
 438
 439     /*
 440      * Windows expects CRLF in the clipboard, so we must convert
 441      * any \n that has come out of the puzzle backend.
 442      */
 443     len = 0;
 444     for (i = 0; data[i]; i++) {
 445         if (data[i] == '\n')
 446             len++;
 447         len++;
 448     }
 449     data2 = snewn(len+1, char);
 450     j = 0;
 451     for (i = 0; data[i]; i++) {
 452         if (data[i] == '\n')
 453             data2[j++] = '\r';
 454         data2[j++] = data[i];
 455     }
 456     assert(j == len);
 457     data2[j] = '\0';
 458
 459     clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len + 1);
 460     if (!clipdata)
 461         return;
 462     lock = GlobalLock(clipdata);
 463     if (!lock)
 464         return;
 465     memcpy(lock, data2, len);
 466     ((unsigned char *) lock)[len] = 0;
 467     GlobalUnlock(clipdata);
 468
 469     if (OpenClipboard(hwnd)) {
 470         EmptyClipboard();
 471         SetClipboardData(CF_TEXT, clipdata);
 472         CloseClipboard();
 473     } else
 474         GlobalFree(clipdata);
 475
 476     sfree(data2);
 477 }
 478
 479 /*
 480  * See if we can find a help file.
 481  */
 482 static void find_help_file(frontend *fe)
 483 {
 484     char b[2048], *p, *q, *r;
 485     FILE *fp;
 486     if (!fe->help_path) {
 487         GetModuleFileName(NULL, b, sizeof(b) - 1);
 488         r = b;
 489         p = strrchr(b, '\\');
 490         if (p && p >= r) r = p+1;
 491         q = strrchr(b, ':');
 492         if (q && q >= r) r = q+1;
 493         strcpy(r, HELP_FILE_NAME);
 494         if ( (fp = fopen(b, "r")) != NULL) {
 495             fe->help_path = dupstr(b);
 496             fclose(fp);
 497         } else
 498             fe->help_path = NULL;
 499         strcpy(r, HELP_CNT_NAME);
 500         if ( (fp = fopen(b, "r")) != NULL) {
 501             fe->help_has_contents = TRUE;
 502             fclose(fp);
 503         } else
 504             fe->help_has_contents = FALSE;
 505     }
 506 }
 507
 508 static void check_window_size(frontend *fe, int *px, int *py)
 509 {
 510     RECT r;
 511     int x, y, sy;
 512
 513     if (fe->statusbar) {
 514         RECT sr;
 515         GetWindowRect(fe->statusbar, &sr);
 516         sy = sr.bottom - sr.top;
 517     } else {
 518         sy = 0;
 519     }
 520
 521     /*
 522      * See if we actually got the window size we wanted, and adjust
 523      * the puzzle size if not.
 524      */
 525     GetClientRect(fe->hwnd, &r);
 526     x = r.right - r.left;
 527     y = r.bottom - r.top - sy;
 528     midend_size(fe->me, &x, &y, FALSE);
 529     if (x != r.right - r.left || y != r.bottom - r.top) {
 530         /*
 531          * Resize the window, now we know what size we _really_
 532          * want it to be.
 533          */
 534         r.left = r.top = 0;
 535         r.right = x;
 536         r.bottom = y + sy;
 537         AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 538                            (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 539                            TRUE, 0);
 540         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left, r.bottom - r.top,
 541                      SWP_NOMOVE | SWP_NOZORDER);
 542     }
 543
 544     if (fe->statusbar) {
 545         GetClientRect(fe->hwnd, &r);
 546         SetWindowPos(fe->statusbar, NULL, 0, r.bottom-r.top-sy, r.right-r.left,
 547                      sy, SWP_NOZORDER);
 548     }
 549
 550     *px = x;
 551     *py = y;
 552 }
 553
 554 static frontend *new_window(HINSTANCE inst, char *game_id, char **error)
 555 {
 556     frontend *fe;
 557     int x, y;
 558     RECT r;
 559     HDC hdc;
 560
 561     fe = snew(frontend);
 562
 563     fe->me = midend_new(fe, &thegame);
 564
 565     if (game_id) {
 566         *error = midend_game_id(fe->me, game_id);
 567         if (*error) {
 568             midend_free(fe->me);
 569             sfree(fe);
 570             return NULL;
 571         }
 572     }
 573
 574     fe->help_path = NULL;
 575     find_help_file(fe);
 576
 577     fe->inst = inst;
 578     midend_new_game(fe->me);
 579
 580     fe->timer = 0;
 581
 582     fe->fonts = NULL;
 583     fe->nfonts = fe->fontsize = 0;
 584
 585     fe->laststatus = NULL;
 586
 587     {
 588         int i, ncolours;
 589         float *colours;
 590
 591         colours = midend_colours(fe->me, &ncolours);
 592
 593         fe->colours = snewn(ncolours, COLORREF);
 594         fe->brushes = snewn(ncolours, HBRUSH);
 595         fe->pens = snewn(ncolours, HPEN);
 596
 597         for (i = 0; i < ncolours; i++) {
 598             fe->colours[i] = RGB(255 * colours[i*3+0],
 599                                  255 * colours[i*3+1],
 600                                  255 * colours[i*3+2]);
 601             fe->brushes[i] = CreateSolidBrush(fe->colours[i]);
 602             fe->pens[i] = CreatePen(PS_SOLID, 1, fe->colours[i]);
 603         }
 604     }
 605
 606     x = y = INT_MAX;                   /* find puzzle's preferred size */
 607     midend_size(fe->me, &x, &y, FALSE);
 608
 609     r.left = r.top = 0;
 610     r.right = x;
 611     r.bottom = y;
 612     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 613                        (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 614                        TRUE, 0);
 615
 616     fe->hwnd = CreateWindowEx(0, thegame.name, thegame.name,
 617                               WS_OVERLAPPEDWINDOW &~
 618                               (WS_THICKFRAME | WS_MAXIMIZEBOX),
 619                               CW_USEDEFAULT, CW_USEDEFAULT,
 620                               r.right - r.left, r.bottom - r.top,
 621                               NULL, NULL, inst, NULL);
 622
 623     if (midend_wants_statusbar(fe->me)) {
 624         RECT sr;
 625         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
 626                                        WS_CHILD | WS_VISIBLE,
 627                                        0, 0, 0, 0, /* status bar does these */
 628                                        fe->hwnd, NULL, inst, NULL);
 629         /*
 630          * Now resize the window to take account of the status bar.
 631          */
 632         GetWindowRect(fe->statusbar, &sr);
 633         GetWindowRect(fe->hwnd, &r);
 634         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left,
 635                      r.bottom - r.top + sr.bottom - sr.top,
 636                      SWP_NOMOVE | SWP_NOZORDER);
 637     } else {
 638         fe->statusbar = NULL;
 639     }
 640
 641     {
 642         HMENU bar = CreateMenu();
 643         HMENU menu = CreateMenu();
 644
 645         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Game");
 646         AppendMenu(menu, MF_ENABLED, IDM_NEW, "New");
 647         AppendMenu(menu, MF_ENABLED, IDM_RESTART, "Restart");
 648         AppendMenu(menu, MF_ENABLED, IDM_DESC, "Specific...");
 649         AppendMenu(menu, MF_ENABLED, IDM_SEED, "Random Seed...");
 650
 651         if ((fe->npresets = midend_num_presets(fe->me)) > 0 ||
 652             thegame.can_configure) {
 653             HMENU sub = CreateMenu();
 654             int i;
 655
 656             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)sub, "Type");
 657
 658             fe->presets = snewn(fe->npresets, game_params *);
 659
 660             for (i = 0; i < fe->npresets; i++) {
 661                 char *name;
 662
 663                 midend_fetch_preset(fe->me, i, &name, &fe->presets[i]);
 664
 665                 /*
 666                  * FIXME: we ought to go through and do something
 667                  * with ampersands here.
 668                  */
 669
 670                 AppendMenu(sub, MF_ENABLED, IDM_PRESETS + 0x10 * i, name);
 671             }
 672
 673             if (thegame.can_configure) {
 674                 AppendMenu(sub, MF_ENABLED, IDM_CONFIG, "Custom...");
 675             }
 676         }
 677
 678         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 679         AppendMenu(menu, MF_ENABLED, IDM_LOAD, "Load");
 680         AppendMenu(menu, MF_ENABLED, IDM_SAVE, "Save");
 681         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 682         AppendMenu(menu, MF_ENABLED, IDM_UNDO, "Undo");
 683         AppendMenu(menu, MF_ENABLED, IDM_REDO, "Redo");
 684         if (thegame.can_format_as_text) {
 685             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 686             AppendMenu(menu, MF_ENABLED, IDM_COPY, "Copy");
 687         }
 688         if (thegame.can_solve) {
 689             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 690             AppendMenu(menu, MF_ENABLED, IDM_SOLVE, "Solve");
 691         }
 692         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 693         AppendMenu(menu, MF_ENABLED, IDM_QUIT, "Exit");
 694         menu = CreateMenu();
 695         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Help");
 696         AppendMenu(menu, MF_ENABLED, IDM_ABOUT, "About");
 697         if (fe->help_path) {
 698             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 699             AppendMenu(menu, MF_ENABLED, IDM_HELPC, "Contents");
 700             if (thegame.winhelp_topic) {
 701                 char *item;
 702                 assert(thegame.name);
 703                 item = snewn(9+strlen(thegame.name), char); /*ick*/
 704                 sprintf(item, "Help on %s", thegame.name);
 705                 AppendMenu(menu, MF_ENABLED, IDM_GAMEHELP, item);
 706                 sfree(item);
 707             }
 708         }
 709         SetMenu(fe->hwnd, bar);
 710     }
 711
 712     check_window_size(fe, &x, &y);
 713
 714     hdc = GetDC(fe->hwnd);
 715     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 716     ReleaseDC(fe->hwnd, hdc);
 717
 718     SetWindowLong(fe->hwnd, GWL_USERDATA, (LONG)fe);
 719
 720     ShowWindow(fe->hwnd, SW_NORMAL);
 721     SetForegroundWindow(fe->hwnd);
 722
 723     midend_redraw(fe->me);
 724
 725     return fe;
 726 }
 727
 728 static int CALLBACK AboutDlgProc(HWND hwnd, UINT msg,
 729                                  WPARAM wParam, LPARAM lParam)
 730 {
 731     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 732
 733     switch (msg) {
 734       case WM_INITDIALOG:
 735         return 0;
 736
 737       case WM_COMMAND:
 738         if ((HIWORD(wParam) == BN_CLICKED ||
 739              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 740             LOWORD(wParam) == IDOK)
 741             fe->dlg_done = 1;
 742         return 0;
 743
 744       case WM_CLOSE:
 745         fe->dlg_done = 1;
 746         return 0;
 747     }
 748
 749     return 0;
 750 }
 751
 752 static int CALLBACK ConfigDlgProc(HWND hwnd, UINT msg,
 753                                   WPARAM wParam, LPARAM lParam)
 754 {
 755     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 756     config_item *i;
 757     struct cfg_aux *j;
 758
 759     switch (msg) {
 760       case WM_INITDIALOG:
 761         return 0;
 762
 763       case WM_COMMAND:
 764         /*
 765          * OK and Cancel are special cases.
 766          */
 767         if ((HIWORD(wParam) == BN_CLICKED ||
 768              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 769             (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)) {
 770             if (LOWORD(wParam) == IDOK) {
 771                 char *err = midend_set_config(fe->me, fe->cfg_which, fe->cfg);
 772
 773                 if (err) {
 774                     MessageBox(hwnd, err, "Validation error",
 775                                MB_ICONERROR | MB_OK);
 776                 } else {
 777                     fe->dlg_done = 2;
 778                 }
 779             } else {
 780                 fe->dlg_done = 1;
 781             }
 782             return 0;
 783         }
 784
 785         /*
 786          * First find the control whose id this is.
 787          */
 788         for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 789             if (j->ctlid == LOWORD(wParam))
 790                 break;
 791         }
 792         if (i->type == C_END)
 793             return 0;                  /* not our problem */
 794
 795         if (i->type == C_STRING && HIWORD(wParam) == EN_CHANGE) {
 796             char buffer[4096];
 797             GetDlgItemText(fe->cfgbox, j->ctlid, buffer, lenof(buffer));
 798             buffer[lenof(buffer)-1] = '\0';
 799             sfree(i->sval);
 800             i->sval = dupstr(buffer);
 801         } else if (i->type == C_BOOLEAN &&
 802                    (HIWORD(wParam) == BN_CLICKED ||
 803                     HIWORD(wParam) == BN_DOUBLECLICKED)) {
 804             i->ival = IsDlgButtonChecked(fe->cfgbox, j->ctlid);
 805         } else if (i->type == C_CHOICES &&
 806                    HIWORD(wParam) == CBN_SELCHANGE) {
 807             i->ival = SendDlgItemMessage(fe->cfgbox, j->ctlid,
 808                                          CB_GETCURSEL, 0, 0);
 809         }
 810
 811         return 0;
 812
 813       case WM_CLOSE:
 814         fe->dlg_done = 1;
 815         return 0;
 816     }
 817
 818     return 0;
 819 }
 820
 821 HWND mkctrl(frontend *fe, int x1, int x2, int y1, int y2,
 822             char *wclass, int wstyle,
 823             int exstyle, const char *wtext, int wid)
 824 {
 825     HWND ret;
 826     ret = CreateWindowEx(exstyle, wclass, wtext,
 827                          wstyle | WS_CHILD | WS_VISIBLE, x1, y1, x2-x1, y2-y1,
 828                          fe->cfgbox, (HMENU) wid, fe->inst, NULL);
 829     SendMessage(ret, WM_SETFONT, (WPARAM)fe->cfgfont, MAKELPARAM(TRUE, 0));
 830     return ret;
 831 }
 832
 833 static void about(frontend *fe)
 834 {
 835     int i;
 836     WNDCLASS wc;
 837     MSG msg;
 838     TEXTMETRIC tm;
 839     HDC hdc;
 840     HFONT oldfont;
 841     SIZE size;
 842     int gm, id;
 843     int winwidth, winheight, y;
 844     int height, width, maxwid;
 845     const char *strings[16];
 846     int lengths[16];
 847     int nstrings = 0;
 848     char titlebuf[512];
 849
 850     sprintf(titlebuf, "About %.250s", thegame.name);
 851
 852     strings[nstrings++] = thegame.name;
 853     strings[nstrings++] = "from Simon Tatham's Portable Puzzle Collection";
 854     strings[nstrings++] = ver;
 855
 856     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
 857     wc.lpfnWndProc = DefDlgProc;
 858     wc.cbClsExtra = 0;
 859     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
 860     wc.hInstance = fe->inst;
 861     wc.hIcon = NULL;
 862     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 863     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
 864     wc.lpszMenuName = NULL;
 865     wc.lpszClassName = "GameAboutBox";
 866     RegisterClass(&wc);
 867
 868     hdc = GetDC(fe->hwnd);
 869     SetMapMode(hdc, MM_TEXT);
 870
 871     fe->dlg_done = FALSE;
 872
 873     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
 874                              0, 0, 0, 0,
 875                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 876                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 877                              DEFAULT_QUALITY,
 878                              FF_SWISS,
 879                              "MS Shell Dlg");
 880
 881     oldfont = SelectObject(hdc, fe->cfgfont);
 882     if (GetTextMetrics(hdc, &tm)) {
 883         height = tm.tmAscent + tm.tmDescent;
 884         width = tm.tmAveCharWidth;
 885     } else {
 886         height = width = 30;
 887     }
 888
 889     /*
 890      * Figure out the layout of the About box by measuring the
 891      * length of each piece of text.
 892      */
 893     maxwid = 0;
 894     winheight = height/2;
 895
 896     for (i = 0; i < nstrings; i++) {
 897         if (GetTextExtentPoint32(hdc, strings[i], strlen(strings[i]), &size))
 898             lengths[i] = size.cx;
 899         else
 900             lengths[i] = 0;            /* *shrug* */
 901         if (maxwid < lengths[i])
 902             maxwid = lengths[i];
 903         winheight += height * 3 / 2 + (height / 2);
 904     }
 905
 906     winheight += height + height * 7 / 4;      /* OK button */
 907     winwidth = maxwid + 4*width;
 908
 909     SelectObject(hdc, oldfont);
 910     ReleaseDC(fe->hwnd, hdc);
 911
 912     /*
 913      * Create the dialog, now that we know its size.
 914      */
 915     {
 916         RECT r, r2;
 917
 918         r.left = r.top = 0;
 919         r.right = winwidth;
 920         r.bottom = winheight;
 921
 922         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
 923                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 924                                 WS_CAPTION | WS_SYSMENU*/) &~
 925                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
 926                            FALSE, 0);
 927
 928         /*
 929          * Centre the dialog on its parent window.
 930          */
 931         r.right -= r.left;
 932         r.bottom -= r.top;
 933         GetWindowRect(fe->hwnd, &r2);
 934         r.left = (r2.left + r2.right - r.right) / 2;
 935         r.top = (r2.top + r2.bottom - r.bottom) / 2;
 936         r.right += r.left;
 937         r.bottom += r.top;
 938
 939         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, titlebuf,
 940                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 941                                     WS_CAPTION | WS_SYSMENU,
 942                                     r.left, r.top,
 943                                     r.right-r.left, r.bottom-r.top,
 944                                     fe->hwnd, NULL, fe->inst, NULL);
 945     }
 946
 947     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
 948
 949     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
 950     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)AboutDlgProc);
 951
 952     id = 1000;
 953     y = height/2;
 954     for (i = 0; i < nstrings; i++) {
 955         int border = width*2 + (maxwid - lengths[i]) / 2;
 956         mkctrl(fe, border, border+lengths[i], y+height*1/8, y+height*9/8,
 957                "Static", 0, 0, strings[i], id++);
 958         y += height*3/2;
 959
 960         assert(y < winheight);
 961         y += height/2;
 962     }
 963
 964     y += height/2;                     /* extra space before OK */
 965     mkctrl(fe, width*2, maxwid+width*2, y, y+height*7/4, "BUTTON",
 966            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
 967            "OK", IDOK);
 968
 969     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
 970
 971     EnableWindow(fe->hwnd, FALSE);
 972     ShowWindow(fe->cfgbox, SW_NORMAL);
 973     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
 974         if (!IsDialogMessage(fe->cfgbox, &msg))
 975             DispatchMessage(&msg);
 976         if (fe->dlg_done)
 977             break;
 978     }
 979     EnableWindow(fe->hwnd, TRUE);
 980     SetForegroundWindow(fe->hwnd);
 981     DestroyWindow(fe->cfgbox);
 982     DeleteObject(fe->cfgfont);
 983 }
 984
 985 static int get_config(frontend *fe, int which)
 986 {
 987     config_item *i;
 988     struct cfg_aux *j;
 989     char *title;
 990     WNDCLASS wc;
 991     MSG msg;
 992     TEXTMETRIC tm;
 993     HDC hdc;
 994     HFONT oldfont;
 995     SIZE size;
 996     HWND ctl;
 997     int gm, id, nctrls;
 998     int winwidth, winheight, col1l, col1r, col2l, col2r, y;
 999     int height, width, maxlabel, maxcheckbox;
1000
1001     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
1002     wc.lpfnWndProc = DefDlgProc;
1003     wc.cbClsExtra = 0;
1004     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
1005     wc.hInstance = fe->inst;
1006     wc.hIcon = NULL;
1007     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
1008     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
1009     wc.lpszMenuName = NULL;
1010     wc.lpszClassName = "GameConfigBox";
1011     RegisterClass(&wc);
1012
1013     hdc = GetDC(fe->hwnd);
1014     SetMapMode(hdc, MM_TEXT);
1015
1016     fe->dlg_done = FALSE;
1017
1018     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
1019                              0, 0, 0, 0,
1020                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
1021                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
1022                              DEFAULT_QUALITY,
1023                              FF_SWISS,
1024                              "MS Shell Dlg");
1025
1026     oldfont = SelectObject(hdc, fe->cfgfont);
1027     if (GetTextMetrics(hdc, &tm)) {
1028         height = tm.tmAscent + tm.tmDescent;
1029         width = tm.tmAveCharWidth;
1030     } else {
1031         height = width = 30;
1032     }
1033
1034     fe->cfg = midend_get_config(fe->me, which, &title);
1035     fe->cfg_which = which;
1036
1037     /*
1038      * Figure out the layout of the config box by measuring the
1039      * length of each piece of text.
1040      */
1041     maxlabel = maxcheckbox = 0;
1042     winheight = height/2;
1043
1044     for (i = fe->cfg; i->type != C_END; i++) {
1045         switch (i->type) {
1046           case C_STRING:
1047           case C_CHOICES:
1048             /*
1049              * Both these control types have a label filling only
1050              * the left-hand column of the box.
1051              */
1052             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1053                 maxlabel < size.cx)
1054                 maxlabel = size.cx;
1055             winheight += height * 3 / 2 + (height / 2);
1056             break;
1057
1058           case C_BOOLEAN:
1059             /*
1060              * Checkboxes take up the whole of the box width.
1061              */
1062             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1063                 maxcheckbox < size.cx)
1064                 maxcheckbox = size.cx;
1065             winheight += height + (height / 2);
1066             break;
1067         }
1068     }
1069
1070     winheight += height + height * 7 / 4;      /* OK / Cancel buttons */
1071
1072     col1l = 2*width;
1073     col1r = col1l + maxlabel;
1074     col2l = col1r + 2*width;
1075     col2r = col2l + 30*width;
1076     if (col2r < col1l+2*height+maxcheckbox)
1077         col2r = col1l+2*height+maxcheckbox;
1078     winwidth = col2r + 2*width;
1079
1080     SelectObject(hdc, oldfont);
1081     ReleaseDC(fe->hwnd, hdc);
1082
1083     /*
1084      * Create the dialog, now that we know its size.
1085      */
1086     {
1087         RECT r, r2;
1088
1089         r.left = r.top = 0;
1090         r.right = winwidth;
1091         r.bottom = winheight;
1092
1093         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
1094                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1095                                 WS_CAPTION | WS_SYSMENU*/) &~
1096                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
1097                            FALSE, 0);
1098
1099         /*
1100          * Centre the dialog on its parent window.
1101          */
1102         r.right -= r.left;
1103         r.bottom -= r.top;
1104         GetWindowRect(fe->hwnd, &r2);
1105         r.left = (r2.left + r2.right - r.right) / 2;
1106         r.top = (r2.top + r2.bottom - r.bottom) / 2;
1107         r.right += r.left;
1108         r.bottom += r.top;
1109
1110         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, title,
1111                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1112                                     WS_CAPTION | WS_SYSMENU,
1113                                     r.left, r.top,
1114                                     r.right-r.left, r.bottom-r.top,
1115                                     fe->hwnd, NULL, fe->inst, NULL);
1116         sfree(title);
1117     }
1118
1119     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
1120
1121     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
1122     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)ConfigDlgProc);
1123
1124     /*
1125      * Count the controls so we can allocate cfgaux.
1126      */
1127     for (nctrls = 0, i = fe->cfg; i->type != C_END; i++)
1128         nctrls++;
1129     fe->cfgaux = snewn(nctrls, struct cfg_aux);
1130
1131     id = 1000;
1132     y = height/2;
1133     for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
1134         switch (i->type) {
1135           case C_STRING:
1136             /*
1137              * Edit box with a label beside it.
1138              */
1139             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1140                    "Static", 0, 0, i->name, id++);
1141             ctl = mkctrl(fe, col2l, col2r, y, y+height*3/2,
1142                          "EDIT", WS_TABSTOP | ES_AUTOHSCROLL,
1143                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1144             SetWindowText(ctl, i->sval);
1145             y += height*3/2;
1146             break;
1147
1148           case C_BOOLEAN:
1149             /*
1150              * Simple checkbox.
1151              */
1152             mkctrl(fe, col1l, col2r, y, y+height, "BUTTON",
1153                    BS_NOTIFY | BS_AUTOCHECKBOX | WS_TABSTOP,
1154                    0, i->name, (j->ctlid = id++));
1155             CheckDlgButton(fe->cfgbox, j->ctlid, (i->ival != 0));
1156             y += height;
1157             break;
1158
1159           case C_CHOICES:
1160             /*
1161              * Drop-down list with a label beside it.
1162              */
1163             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1164                    "STATIC", 0, 0, i->name, id++);
1165             ctl = mkctrl(fe, col2l, col2r, y, y+height*41/2,
1166                          "COMBOBOX", WS_TABSTOP |
1167                          CBS_DROPDOWNLIST | CBS_HASSTRINGS,
1168                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1169             {
1170                 char c, *p, *q, *str;
1171
1172                 SendMessage(ctl, CB_RESETCONTENT, 0, 0);
1173                 p = i->sval;
1174                 c = *p++;
1175                 while (*p) {
1176                     q = p;
1177                     while (*q && *q != c) q++;
1178                     str = snewn(q-p+1, char);
1179                     strncpy(str, p, q-p);
1180                     str[q-p] = '\0';
1181                     SendMessage(ctl, CB_ADDSTRING, 0, (LPARAM)str);
1182                     sfree(str);
1183                     if (*q) q++;
1184                     p = q;
1185                 }
1186             }
1187
1188             SendMessage(ctl, CB_SETCURSEL, i->ival, 0);
1189
1190             y += height*3/2;
1191             break;
1192         }
1193
1194         assert(y < winheight);
1195         y += height/2;
1196     }
1197
1198     y += height/2;                     /* extra space before OK and Cancel */
1199     mkctrl(fe, col1l, (col1l+col2r)/2-width, y, y+height*7/4, "BUTTON",
1200            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
1201            "OK", IDOK);
1202     mkctrl(fe, (col1l+col2r)/2+width, col2r, y, y+height*7/4, "BUTTON",
1203            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP, 0, "Cancel", IDCANCEL);
1204
1205     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
1206
1207     EnableWindow(fe->hwnd, FALSE);
1208     ShowWindow(fe->cfgbox, SW_NORMAL);
1209     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
1210         if (!IsDialogMessage(fe->cfgbox, &msg))
1211             DispatchMessage(&msg);
1212         if (fe->dlg_done)
1213             break;
1214     }
1215     EnableWindow(fe->hwnd, TRUE);
1216     SetForegroundWindow(fe->hwnd);
1217     DestroyWindow(fe->cfgbox);
1218     DeleteObject(fe->cfgfont);
1219
1220     free_cfg(fe->cfg);
1221     sfree(fe->cfgaux);
1222
1223     return (fe->dlg_done == 2);
1224 }
1225
1226 static void new_game_size(frontend *fe)
1227 {
1228     RECT r, sr;
1229     HDC hdc;
1230     int x, y;
1231
1232     x = y = INT_MAX;
1233     midend_size(fe->me, &x, &y, FALSE);
1234
1235     r.left = r.top = 0;
1236     r.right = x;
1237     r.bottom = y;
1238     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
1239                        (WS_THICKFRAME | WS_MAXIMIZEBOX |
1240                         WS_OVERLAPPED),
1241                        TRUE, 0);
1242
1243     if (fe->statusbar != NULL) {
1244         GetWindowRect(fe->statusbar, &sr);
1245     } else {
1246         sr.left = sr.right = sr.top = sr.bottom = 0;
1247     }
1248     SetWindowPos(fe->hwnd, NULL, 0, 0,
1249                  r.right - r.left,
1250                  r.bottom - r.top + sr.bottom - sr.top,
1251                  SWP_NOMOVE | SWP_NOZORDER);
1252
1253     check_window_size(fe, &x, &y);
1254
1255     if (fe->statusbar != NULL)
1256         SetWindowPos(fe->statusbar, NULL, 0, y, x,
1257                      sr.bottom - sr.top, SWP_NOZORDER);
1258
1259     DeleteObject(fe->bitmap);
1260
1261     hdc = GetDC(fe->hwnd);
1262     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
1263     ReleaseDC(fe->hwnd, hdc);
1264
1265     midend_redraw(fe->me);
1266 }
1267
1268 static void new_game_type(frontend *fe)
1269 {
1270     midend_new_game(fe->me);
1271     new_game_size(fe);
1272 }
1273
1274 static int is_alt_pressed(void)
1275 {
1276     BYTE keystate[256];
1277     int r = GetKeyboardState(keystate);
1278     if (!r)
1279         return FALSE;
1280     if (keystate[VK_MENU] & 0x80)
1281         return TRUE;
1282     if (keystate[VK_RMENU] & 0x80)
1283         return TRUE;
1284     return FALSE;
1285 }
1286
1287 static void savefile_write(void *wctx, void *buf, int len)
1288 {
1289     FILE *fp = (FILE *)wctx;
1290     fwrite(buf, 1, len, fp);
1291 }
1292
1293 static int savefile_read(void *wctx, void *buf, int len)
1294 {
1295     FILE *fp = (FILE *)wctx;
1296     int ret;
1297
1298     ret = fread(buf, 1, len, fp);
1299     return (ret == len);
1300 }
1301
1302 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
1303                                 WPARAM wParam, LPARAM lParam)
1304 {
1305     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
1306     int cmd;
1307
1308     switch (message) {
1309       case WM_CLOSE:
1310         DestroyWindow(hwnd);
1311         return 0;
1312       case WM_COMMAND:
1313         cmd = wParam & ~0xF;           /* low 4 bits reserved to Windows */
1314         switch (cmd) {
1315           case IDM_NEW:
1316             if (!midend_process_key(fe->me, 0, 0, 'n'))
1317                 PostQuitMessage(0);
1318             break;
1319           case IDM_RESTART:
1320             midend_restart_game(fe->me);
1321             break;
1322           case IDM_UNDO:
1323             if (!midend_process_key(fe->me, 0, 0, 'u'))
1324                 PostQuitMessage(0);
1325             break;
1326           case IDM_REDO:
1327             if (!midend_process_key(fe->me, 0, 0, '\x12'))
1328                 PostQuitMessage(0);
1329             break;
1330           case IDM_COPY:
1331             {
1332                 char *text = midend_text_format(fe->me);
1333                 if (text)
1334                     write_clip(hwnd, text);
1335                 else
1336                     MessageBeep(MB_ICONWARNING);
1337                 sfree(text);
1338             }
1339             break;
1340           case IDM_SOLVE:
1341             {
1342                 char *msg = midend_solve(fe->me);
1343                 if (msg)
1344                     MessageBox(hwnd, msg, "Unable to solve",
1345                                MB_ICONERROR | MB_OK);
1346             }
1347             break;
1348           case IDM_QUIT:
1349             if (!midend_process_key(fe->me, 0, 0, 'q'))
1350                 PostQuitMessage(0);
1351             break;
1352           case IDM_CONFIG:
1353             if (get_config(fe, CFG_SETTINGS))
1354                 new_game_type(fe);
1355             break;
1356           case IDM_SEED:
1357             if (get_config(fe, CFG_SEED))
1358                 new_game_type(fe);
1359             break;
1360           case IDM_DESC:
1361             if (get_config(fe, CFG_DESC))
1362                 new_game_type(fe);
1363             break;
1364           case IDM_ABOUT:
1365             about(fe);
1366             break;
1367           case IDM_LOAD:
1368           case IDM_SAVE:
1369             {
1370                 OPENFILENAME of;
1371                 char filename[FILENAME_MAX];
1372                 int ret;
1373
1374                 memset(&of, 0, sizeof(of));
1375                 of.hwndOwner = hwnd;
1376                 of.lpstrFilter = "All Files (*.*)\0*\0\0\0";
1377                 of.lpstrCustomFilter = NULL;
1378                 of.nFilterIndex = 1;
1379                 of.lpstrFile = filename;
1380                 filename[0] = '\0';
1381                 of.nMaxFile = lenof(filename);
1382                 of.lpstrFileTitle = NULL;
1383                 of.lpstrTitle = (cmd == IDM_SAVE ?
1384                                  "Enter name of game file to save" :
1385                                  "Enter name of saved game file to load");
1386                 of.Flags = 0;
1387 #ifdef OPENFILENAME_SIZE_VERSION_400
1388                 of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
1389 #else
1390                 of.lStructSize = sizeof(of);
1391 #endif
1392                 of.lpstrInitialDir = NULL;
1393
1394                 if (cmd == IDM_SAVE)
1395                     ret = GetSaveFileName(&of);
1396                 else
1397                     ret = GetOpenFileName(&of);
1398
1399                 if (ret) {
1400                     if (cmd == IDM_SAVE) {
1401                         FILE *fp;
1402
1403                         if ((fp = fopen(filename, "r")) != NULL) {
1404                             char buf[256 + FILENAME_MAX];
1405                             fclose(fp);
1406                             /* file exists */
1407
1408                             sprintf(buf, "Are you sure you want to overwrite"
1409                                     " the file \"%.*s\"?",
1410                                     FILENAME_MAX, filename);
1411                             if (MessageBox(hwnd, buf, "Question",
1412                                            MB_YESNO | MB_ICONQUESTION)
1413                                 != IDYES)
1414                                 break;
1415                         }
1416
1417                         fp = fopen(filename, "w");
1418
1419                         if (!fp) {
1420                             MessageBox(hwnd, "Unable to open save file",
1421                                        "Error", MB_ICONERROR | MB_OK);
1422                             break;
1423                         }
1424
1425                         midend_serialise(fe->me, savefile_write, fp);
1426
1427                         fclose(fp);
1428                     } else {
1429                         FILE *fp = fopen(filename, "r");
1430                         char *err;
1431
1432                         if (!fp) {
1433                             MessageBox(hwnd, "Unable to open saved game file",
1434                                        "Error", MB_ICONERROR | MB_OK);
1435                             break;
1436                         }
1437
1438                         err = midend_deserialise(fe->me, savefile_read, fp);
1439
1440                         fclose(fp);
1441
1442                         if (err) {
1443                             MessageBox(hwnd, err, "Error", MB_ICONERROR|MB_OK);
1444                             break;
1445                         }
1446
1447                         new_game_size(fe);
1448                     }
1449                 }
1450             }
1451
1452             break;
1453           case IDM_HELPC:
1454             assert(fe->help_path);
1455             WinHelp(hwnd, fe->help_path,
1456                     fe->help_has_contents ? HELP_FINDER : HELP_CONTENTS, 0);
1457             break;
1458           case IDM_GAMEHELP:
1459             assert(fe->help_path);
1460             assert(thegame.winhelp_topic);
1461             {
1462                 char *cmd = snewn(10+strlen(thegame.winhelp_topic), char);
1463                 sprintf(cmd, "JI(`',`%s')", thegame.winhelp_topic);
1464                 WinHelp(hwnd, fe->help_path, HELP_COMMAND, (DWORD)cmd);
1465                 sfree(cmd);
1466             }
1467             break;
1468           default:
1469             {
1470                 int p = ((wParam &~ 0xF) - IDM_PRESETS) / 0x10;
1471
1472                 if (p >= 0 && p < fe->npresets) {
1473                     midend_set_params(fe->me, fe->presets[p]);
1474                     new_game_type(fe);
1475                 }
1476             }
1477             break;
1478         }
1479         break;
1480       case WM_DESTROY:
1481         PostQuitMessage(0);
1482         return 0;
1483       case WM_PAINT:
1484         {
1485             PAINTSTRUCT p;
1486             HDC hdc, hdc2;
1487             HBITMAP prevbm;
1488
1489             hdc = BeginPaint(hwnd, &p);
1490             hdc2 = CreateCompatibleDC(hdc);
1491             prevbm = SelectObject(hdc2, fe->bitmap);
1492             BitBlt(hdc,
1493                    p.rcPaint.left, p.rcPaint.top,
1494                    p.rcPaint.right - p.rcPaint.left,
1495                    p.rcPaint.bottom - p.rcPaint.top,
1496                    hdc2,
1497                    p.rcPaint.left, p.rcPaint.top,
1498                    SRCCOPY);
1499             SelectObject(hdc2, prevbm);
1500             DeleteDC(hdc2);
1501             EndPaint(hwnd, &p);
1502         }
1503         return 0;
1504       case WM_KEYDOWN:
1505         {
1506             int key = -1;
1507             BYTE keystate[256];
1508             int r = GetKeyboardState(keystate);
1509             int shift = (r && (keystate[VK_SHIFT] & 0x80)) ? MOD_SHFT : 0;
1510             int ctrl = (r && (keystate[VK_CONTROL] & 0x80)) ? MOD_CTRL : 0;
1511
1512             switch (wParam) {
1513               case VK_LEFT:
1514                 if (!(lParam & 0x01000000))
1515                     key = MOD_NUM_KEYPAD | '4';
1516                 else
1517                     key = shift | ctrl | CURSOR_LEFT;
1518                 break;
1519               case VK_RIGHT:
1520                 if (!(lParam & 0x01000000))
1521                     key = MOD_NUM_KEYPAD | '6';
1522                 else
1523                     key = shift | ctrl | CURSOR_RIGHT;
1524                 break;
1525               case VK_UP:
1526                 if (!(lParam & 0x01000000))
1527                     key = MOD_NUM_KEYPAD | '8';
1528                 else
1529                     key = shift | ctrl | CURSOR_UP;
1530                 break;
1531               case VK_DOWN:
1532                 if (!(lParam & 0x01000000))
1533                     key = MOD_NUM_KEYPAD | '2';
1534                 else
1535                     key = shift | ctrl | CURSOR_DOWN;
1536                 break;
1537                 /*
1538                  * Diagonal keys on the numeric keypad.
1539                  */
1540               case VK_PRIOR:
1541                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '9';
1542                 break;
1543               case VK_NEXT:
1544                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '3';
1545                 break;
1546               case VK_HOME:
1547                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '7';
1548                 break;
1549               case VK_END:
1550                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '1';
1551                 break;
1552               case VK_INSERT:
1553                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '0';
1554                 break;
1555               case VK_CLEAR:
1556                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '5';
1557                 break;
1558                 /*
1559                  * Numeric keypad keys with Num Lock on.
1560                  */
1561               case VK_NUMPAD4: key = MOD_NUM_KEYPAD | '4'; break;
1562               case VK_NUMPAD6: key = MOD_NUM_KEYPAD | '6'; break;
1563               case VK_NUMPAD8: key = MOD_NUM_KEYPAD | '8'; break;
1564               case VK_NUMPAD2: key = MOD_NUM_KEYPAD | '2'; break;
1565               case VK_NUMPAD5: key = MOD_NUM_KEYPAD | '5'; break;
1566               case VK_NUMPAD9: key = MOD_NUM_KEYPAD | '9'; break;
1567               case VK_NUMPAD3: key = MOD_NUM_KEYPAD | '3'; break;
1568               case VK_NUMPAD7: key = MOD_NUM_KEYPAD | '7'; break;
1569               case VK_NUMPAD1: key = MOD_NUM_KEYPAD | '1'; break;
1570               case VK_NUMPAD0: key = MOD_NUM_KEYPAD | '0'; break;
1571             }
1572
1573             if (key != -1) {
1574                 if (!midend_process_key(fe->me, 0, 0, key))
1575                     PostQuitMessage(0);
1576             } else {
1577                 MSG m;
1578                 m.hwnd = hwnd;
1579                 m.message = WM_KEYDOWN;
1580                 m.wParam = wParam;
1581                 m.lParam = lParam & 0xdfff;
1582                 TranslateMessage(&m);
1583             }
1584         }
1585         break;
1586       case WM_LBUTTONDOWN:
1587       case WM_RBUTTONDOWN:
1588       case WM_MBUTTONDOWN:
1589         {
1590             int button;
1591
1592             /*
1593              * Shift-clicks count as middle-clicks, since otherwise
1594              * two-button Windows users won't have any kind of
1595              * middle click to use.
1596              */
1597             if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
1598                 button = MIDDLE_BUTTON;
1599             else if (message == WM_RBUTTONDOWN || is_alt_pressed())
1600                 button = RIGHT_BUTTON;
1601             else
1602                 button = LEFT_BUTTON;
1603
1604             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1605                                     (signed short)HIWORD(lParam), button))
1606                 PostQuitMessage(0);
1607
1608             SetCapture(hwnd);
1609         }
1610         break;
1611       case WM_LBUTTONUP:
1612       case WM_RBUTTONUP:
1613       case WM_MBUTTONUP:
1614         {
1615             int button;
1616
1617             /*
1618              * Shift-clicks count as middle-clicks, since otherwise
1619              * two-button Windows users won't have any kind of
1620              * middle click to use.
1621              */
1622             if (message == WM_MBUTTONUP || (wParam & MK_SHIFT))
1623                 button = MIDDLE_RELEASE;
1624             else if (message == WM_RBUTTONUP || is_alt_pressed())
1625                 button = RIGHT_RELEASE;
1626             else
1627                 button = LEFT_RELEASE;
1628
1629             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1630                                     (signed short)HIWORD(lParam), button))
1631                 PostQuitMessage(0);
1632
1633             ReleaseCapture();
1634         }
1635         break;
1636       case WM_MOUSEMOVE:
1637         {
1638             int button;
1639
1640             if (wParam & (MK_MBUTTON | MK_SHIFT))
1641                 button = MIDDLE_DRAG;
1642             else if (wParam & MK_RBUTTON || is_alt_pressed())
1643                 button = RIGHT_DRAG;
1644             else
1645                 button = LEFT_DRAG;
1646
1647             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1648                                     (signed short)HIWORD(lParam), button))
1649                 PostQuitMessage(0);
1650         }
1651         break;
1652       case WM_CHAR:
1653         if (!midend_process_key(fe->me, 0, 0, (unsigned char)wParam))
1654             PostQuitMessage(0);
1655         return 0;
1656       case WM_TIMER:
1657         if (fe->timer) {
1658             DWORD now = GetTickCount();
1659             float elapsed = (float) (now - fe->timer_last_tickcount) * 0.001F;
1660             midend_timer(fe->me, elapsed);
1661             fe->timer_last_tickcount = now;
1662         }
1663         return 0;
1664     }
1665
1666     return DefWindowProc(hwnd, message, wParam, lParam);
1667 }
1668
1669 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
1670 {
1671     MSG msg;
1672     char *error;
1673
1674     InitCommonControls();
1675
1676     if (!prev) {
1677         WNDCLASS wndclass;
1678
1679         wndclass.style = 0;
1680         wndclass.lpfnWndProc = WndProc;
1681         wndclass.cbClsExtra = 0;
1682         wndclass.cbWndExtra = 0;
1683         wndclass.hInstance = inst;
1684         wndclass.hIcon = LoadIcon(inst, IDI_APPLICATION);
1685         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
1686         wndclass.hbrBackground = NULL;
1687         wndclass.lpszMenuName = NULL;
1688         wndclass.lpszClassName = thegame.name;
1689
1690         RegisterClass(&wndclass);
1691     }
1692
1693     while (*cmdline && isspace(*cmdline))
1694         cmdline++;
1695
1696     if (!new_window(inst, *cmdline ? cmdline : NULL, &error)) {
1697         char buf[128];
1698         sprintf(buf, "%.100s Error", thegame.name);
1699         MessageBox(NULL, error, buf, MB_OK|MB_ICONERROR);
1700         return 1;
1701     }
1702
1703     while (GetMessage(&msg, NULL, 0, 0)) {
1704         DispatchMessage(&msg);
1705     }
1706
1707     return msg.wParam;
1708 }