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     if (fe->hwnd) 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
 579     fe->timer = 0;
 580     fe->hwnd = NULL;
 581
 582     midend_new_game(fe->me);
 583
 584     fe->fonts = NULL;
 585     fe->nfonts = fe->fontsize = 0;
 586
 587     fe->laststatus = NULL;
 588
 589     {
 590         int i, ncolours;
 591         float *colours;
 592
 593         colours = midend_colours(fe->me, &ncolours);
 594
 595         fe->colours = snewn(ncolours, COLORREF);
 596         fe->brushes = snewn(ncolours, HBRUSH);
 597         fe->pens = snewn(ncolours, HPEN);
 598
 599         for (i = 0; i < ncolours; i++) {
 600             fe->colours[i] = RGB(255 * colours[i*3+0],
 601                                  255 * colours[i*3+1],
 602                                  255 * colours[i*3+2]);
 603             fe->brushes[i] = CreateSolidBrush(fe->colours[i]);
 604             fe->pens[i] = CreatePen(PS_SOLID, 1, fe->colours[i]);
 605         }
 606     }
 607
 608     x = y = INT_MAX;                   /* find puzzle's preferred size */
 609     midend_size(fe->me, &x, &y, FALSE);
 610
 611     r.left = r.top = 0;
 612     r.right = x;
 613     r.bottom = y;
 614     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 615                        (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 616                        TRUE, 0);
 617
 618     fe->hwnd = CreateWindowEx(0, thegame.name, thegame.name,
 619                               WS_OVERLAPPEDWINDOW &~
 620                               (WS_THICKFRAME | WS_MAXIMIZEBOX),
 621                               CW_USEDEFAULT, CW_USEDEFAULT,
 622                               r.right - r.left, r.bottom - r.top,
 623                               NULL, NULL, inst, NULL);
 624
 625     if (midend_wants_statusbar(fe->me)) {
 626         RECT sr;
 627         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
 628                                        WS_CHILD | WS_VISIBLE,
 629                                        0, 0, 0, 0, /* status bar does these */
 630                                        fe->hwnd, NULL, inst, NULL);
 631         /*
 632          * Now resize the window to take account of the status bar.
 633          */
 634         GetWindowRect(fe->statusbar, &sr);
 635         GetWindowRect(fe->hwnd, &r);
 636         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left,
 637                      r.bottom - r.top + sr.bottom - sr.top,
 638                      SWP_NOMOVE | SWP_NOZORDER);
 639     } else {
 640         fe->statusbar = NULL;
 641     }
 642
 643     {
 644         HMENU bar = CreateMenu();
 645         HMENU menu = CreateMenu();
 646
 647         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Game");
 648         AppendMenu(menu, MF_ENABLED, IDM_NEW, "New");
 649         AppendMenu(menu, MF_ENABLED, IDM_RESTART, "Restart");
 650         AppendMenu(menu, MF_ENABLED, IDM_DESC, "Specific...");
 651         AppendMenu(menu, MF_ENABLED, IDM_SEED, "Random Seed...");
 652
 653         if ((fe->npresets = midend_num_presets(fe->me)) > 0 ||
 654             thegame.can_configure) {
 655             HMENU sub = CreateMenu();
 656             int i;
 657
 658             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)sub, "Type");
 659
 660             fe->presets = snewn(fe->npresets, game_params *);
 661
 662             for (i = 0; i < fe->npresets; i++) {
 663                 char *name;
 664
 665                 midend_fetch_preset(fe->me, i, &name, &fe->presets[i]);
 666
 667                 /*
 668                  * FIXME: we ought to go through and do something
 669                  * with ampersands here.
 670                  */
 671
 672                 AppendMenu(sub, MF_ENABLED, IDM_PRESETS + 0x10 * i, name);
 673             }
 674
 675             if (thegame.can_configure) {
 676                 AppendMenu(sub, MF_ENABLED, IDM_CONFIG, "Custom...");
 677             }
 678         }
 679
 680         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 681         AppendMenu(menu, MF_ENABLED, IDM_LOAD, "Load");
 682         AppendMenu(menu, MF_ENABLED, IDM_SAVE, "Save");
 683         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 684         AppendMenu(menu, MF_ENABLED, IDM_UNDO, "Undo");
 685         AppendMenu(menu, MF_ENABLED, IDM_REDO, "Redo");
 686         if (thegame.can_format_as_text) {
 687             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 688             AppendMenu(menu, MF_ENABLED, IDM_COPY, "Copy");
 689         }
 690         if (thegame.can_solve) {
 691             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 692             AppendMenu(menu, MF_ENABLED, IDM_SOLVE, "Solve");
 693         }
 694         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 695         AppendMenu(menu, MF_ENABLED, IDM_QUIT, "Exit");
 696         menu = CreateMenu();
 697         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Help");
 698         AppendMenu(menu, MF_ENABLED, IDM_ABOUT, "About");
 699         if (fe->help_path) {
 700             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 701             AppendMenu(menu, MF_ENABLED, IDM_HELPC, "Contents");
 702             if (thegame.winhelp_topic) {
 703                 char *item;
 704                 assert(thegame.name);
 705                 item = snewn(9+strlen(thegame.name), char); /*ick*/
 706                 sprintf(item, "Help on %s", thegame.name);
 707                 AppendMenu(menu, MF_ENABLED, IDM_GAMEHELP, item);
 708                 sfree(item);
 709             }
 710         }
 711         SetMenu(fe->hwnd, bar);
 712     }
 713
 714     check_window_size(fe, &x, &y);
 715
 716     hdc = GetDC(fe->hwnd);
 717     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 718     ReleaseDC(fe->hwnd, hdc);
 719
 720     SetWindowLong(fe->hwnd, GWL_USERDATA, (LONG)fe);
 721
 722     ShowWindow(fe->hwnd, SW_NORMAL);
 723     SetForegroundWindow(fe->hwnd);
 724
 725     midend_redraw(fe->me);
 726
 727     return fe;
 728 }
 729
 730 static int CALLBACK AboutDlgProc(HWND hwnd, UINT msg,
 731                                  WPARAM wParam, LPARAM lParam)
 732 {
 733     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 734
 735     switch (msg) {
 736       case WM_INITDIALOG:
 737         return 0;
 738
 739       case WM_COMMAND:
 740         if ((HIWORD(wParam) == BN_CLICKED ||
 741              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 742             LOWORD(wParam) == IDOK)
 743             fe->dlg_done = 1;
 744         return 0;
 745
 746       case WM_CLOSE:
 747         fe->dlg_done = 1;
 748         return 0;
 749     }
 750
 751     return 0;
 752 }
 753
 754 static int CALLBACK ConfigDlgProc(HWND hwnd, UINT msg,
 755                                   WPARAM wParam, LPARAM lParam)
 756 {
 757     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 758     config_item *i;
 759     struct cfg_aux *j;
 760
 761     switch (msg) {
 762       case WM_INITDIALOG:
 763         return 0;
 764
 765       case WM_COMMAND:
 766         /*
 767          * OK and Cancel are special cases.
 768          */
 769         if ((HIWORD(wParam) == BN_CLICKED ||
 770              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 771             (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)) {
 772             if (LOWORD(wParam) == IDOK) {
 773                 char *err = midend_set_config(fe->me, fe->cfg_which, fe->cfg);
 774
 775                 if (err) {
 776                     MessageBox(hwnd, err, "Validation error",
 777                                MB_ICONERROR | MB_OK);
 778                 } else {
 779                     fe->dlg_done = 2;
 780                 }
 781             } else {
 782                 fe->dlg_done = 1;
 783             }
 784             return 0;
 785         }
 786
 787         /*
 788          * First find the control whose id this is.
 789          */
 790         for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 791             if (j->ctlid == LOWORD(wParam))
 792                 break;
 793         }
 794         if (i->type == C_END)
 795             return 0;                  /* not our problem */
 796
 797         if (i->type == C_STRING && HIWORD(wParam) == EN_CHANGE) {
 798             char buffer[4096];
 799             GetDlgItemText(fe->cfgbox, j->ctlid, buffer, lenof(buffer));
 800             buffer[lenof(buffer)-1] = '\0';
 801             sfree(i->sval);
 802             i->sval = dupstr(buffer);
 803         } else if (i->type == C_BOOLEAN &&
 804                    (HIWORD(wParam) == BN_CLICKED ||
 805                     HIWORD(wParam) == BN_DOUBLECLICKED)) {
 806             i->ival = IsDlgButtonChecked(fe->cfgbox, j->ctlid);
 807         } else if (i->type == C_CHOICES &&
 808                    HIWORD(wParam) == CBN_SELCHANGE) {
 809             i->ival = SendDlgItemMessage(fe->cfgbox, j->ctlid,
 810                                          CB_GETCURSEL, 0, 0);
 811         }
 812
 813         return 0;
 814
 815       case WM_CLOSE:
 816         fe->dlg_done = 1;
 817         return 0;
 818     }
 819
 820     return 0;
 821 }
 822
 823 HWND mkctrl(frontend *fe, int x1, int x2, int y1, int y2,
 824             char *wclass, int wstyle,
 825             int exstyle, const char *wtext, int wid)
 826 {
 827     HWND ret;
 828     ret = CreateWindowEx(exstyle, wclass, wtext,
 829                          wstyle | WS_CHILD | WS_VISIBLE, x1, y1, x2-x1, y2-y1,
 830                          fe->cfgbox, (HMENU) wid, fe->inst, NULL);
 831     SendMessage(ret, WM_SETFONT, (WPARAM)fe->cfgfont, MAKELPARAM(TRUE, 0));
 832     return ret;
 833 }
 834
 835 static void about(frontend *fe)
 836 {
 837     int i;
 838     WNDCLASS wc;
 839     MSG msg;
 840     TEXTMETRIC tm;
 841     HDC hdc;
 842     HFONT oldfont;
 843     SIZE size;
 844     int gm, id;
 845     int winwidth, winheight, y;
 846     int height, width, maxwid;
 847     const char *strings[16];
 848     int lengths[16];
 849     int nstrings = 0;
 850     char titlebuf[512];
 851
 852     sprintf(titlebuf, "About %.250s", thegame.name);
 853
 854     strings[nstrings++] = thegame.name;
 855     strings[nstrings++] = "from Simon Tatham's Portable Puzzle Collection";
 856     strings[nstrings++] = ver;
 857
 858     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
 859     wc.lpfnWndProc = DefDlgProc;
 860     wc.cbClsExtra = 0;
 861     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
 862     wc.hInstance = fe->inst;
 863     wc.hIcon = NULL;
 864     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 865     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
 866     wc.lpszMenuName = NULL;
 867     wc.lpszClassName = "GameAboutBox";
 868     RegisterClass(&wc);
 869
 870     hdc = GetDC(fe->hwnd);
 871     SetMapMode(hdc, MM_TEXT);
 872
 873     fe->dlg_done = FALSE;
 874
 875     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
 876                              0, 0, 0, 0,
 877                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 878                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 879                              DEFAULT_QUALITY,
 880                              FF_SWISS,
 881                              "MS Shell Dlg");
 882
 883     oldfont = SelectObject(hdc, fe->cfgfont);
 884     if (GetTextMetrics(hdc, &tm)) {
 885         height = tm.tmAscent + tm.tmDescent;
 886         width = tm.tmAveCharWidth;
 887     } else {
 888         height = width = 30;
 889     }
 890
 891     /*
 892      * Figure out the layout of the About box by measuring the
 893      * length of each piece of text.
 894      */
 895     maxwid = 0;
 896     winheight = height/2;
 897
 898     for (i = 0; i < nstrings; i++) {
 899         if (GetTextExtentPoint32(hdc, strings[i], strlen(strings[i]), &size))
 900             lengths[i] = size.cx;
 901         else
 902             lengths[i] = 0;            /* *shrug* */
 903         if (maxwid < lengths[i])
 904             maxwid = lengths[i];
 905         winheight += height * 3 / 2 + (height / 2);
 906     }
 907
 908     winheight += height + height * 7 / 4;      /* OK button */
 909     winwidth = maxwid + 4*width;
 910
 911     SelectObject(hdc, oldfont);
 912     ReleaseDC(fe->hwnd, hdc);
 913
 914     /*
 915      * Create the dialog, now that we know its size.
 916      */
 917     {
 918         RECT r, r2;
 919
 920         r.left = r.top = 0;
 921         r.right = winwidth;
 922         r.bottom = winheight;
 923
 924         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
 925                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 926                                 WS_CAPTION | WS_SYSMENU*/) &~
 927                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
 928                            FALSE, 0);
 929
 930         /*
 931          * Centre the dialog on its parent window.
 932          */
 933         r.right -= r.left;
 934         r.bottom -= r.top;
 935         GetWindowRect(fe->hwnd, &r2);
 936         r.left = (r2.left + r2.right - r.right) / 2;
 937         r.top = (r2.top + r2.bottom - r.bottom) / 2;
 938         r.right += r.left;
 939         r.bottom += r.top;
 940
 941         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, titlebuf,
 942                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 943                                     WS_CAPTION | WS_SYSMENU,
 944                                     r.left, r.top,
 945                                     r.right-r.left, r.bottom-r.top,
 946                                     fe->hwnd, NULL, fe->inst, NULL);
 947     }
 948
 949     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
 950
 951     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
 952     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)AboutDlgProc);
 953
 954     id = 1000;
 955     y = height/2;
 956     for (i = 0; i < nstrings; i++) {
 957         int border = width*2 + (maxwid - lengths[i]) / 2;
 958         mkctrl(fe, border, border+lengths[i], y+height*1/8, y+height*9/8,
 959                "Static", 0, 0, strings[i], id++);
 960         y += height*3/2;
 961
 962         assert(y < winheight);
 963         y += height/2;
 964     }
 965
 966     y += height/2;                     /* extra space before OK */
 967     mkctrl(fe, width*2, maxwid+width*2, y, y+height*7/4, "BUTTON",
 968            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
 969            "OK", IDOK);
 970
 971     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
 972
 973     EnableWindow(fe->hwnd, FALSE);
 974     ShowWindow(fe->cfgbox, SW_NORMAL);
 975     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
 976         if (!IsDialogMessage(fe->cfgbox, &msg))
 977             DispatchMessage(&msg);
 978         if (fe->dlg_done)
 979             break;
 980     }
 981     EnableWindow(fe->hwnd, TRUE);
 982     SetForegroundWindow(fe->hwnd);
 983     DestroyWindow(fe->cfgbox);
 984     DeleteObject(fe->cfgfont);
 985 }
 986
 987 static int get_config(frontend *fe, int which)
 988 {
 989     config_item *i;
 990     struct cfg_aux *j;
 991     char *title;
 992     WNDCLASS wc;
 993     MSG msg;
 994     TEXTMETRIC tm;
 995     HDC hdc;
 996     HFONT oldfont;
 997     SIZE size;
 998     HWND ctl;
 999     int gm, id, nctrls;
1000     int winwidth, winheight, col1l, col1r, col2l, col2r, y;
1001     int height, width, maxlabel, maxcheckbox;
1002
1003     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
1004     wc.lpfnWndProc = DefDlgProc;
1005     wc.cbClsExtra = 0;
1006     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
1007     wc.hInstance = fe->inst;
1008     wc.hIcon = NULL;
1009     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
1010     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
1011     wc.lpszMenuName = NULL;
1012     wc.lpszClassName = "GameConfigBox";
1013     RegisterClass(&wc);
1014
1015     hdc = GetDC(fe->hwnd);
1016     SetMapMode(hdc, MM_TEXT);
1017
1018     fe->dlg_done = FALSE;
1019
1020     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
1021                              0, 0, 0, 0,
1022                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
1023                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
1024                              DEFAULT_QUALITY,
1025                              FF_SWISS,
1026                              "MS Shell Dlg");
1027
1028     oldfont = SelectObject(hdc, fe->cfgfont);
1029     if (GetTextMetrics(hdc, &tm)) {
1030         height = tm.tmAscent + tm.tmDescent;
1031         width = tm.tmAveCharWidth;
1032     } else {
1033         height = width = 30;
1034     }
1035
1036     fe->cfg = midend_get_config(fe->me, which, &title);
1037     fe->cfg_which = which;
1038
1039     /*
1040      * Figure out the layout of the config box by measuring the
1041      * length of each piece of text.
1042      */
1043     maxlabel = maxcheckbox = 0;
1044     winheight = height/2;
1045
1046     for (i = fe->cfg; i->type != C_END; i++) {
1047         switch (i->type) {
1048           case C_STRING:
1049           case C_CHOICES:
1050             /*
1051              * Both these control types have a label filling only
1052              * the left-hand column of the box.
1053              */
1054             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1055                 maxlabel < size.cx)
1056                 maxlabel = size.cx;
1057             winheight += height * 3 / 2 + (height / 2);
1058             break;
1059
1060           case C_BOOLEAN:
1061             /*
1062              * Checkboxes take up the whole of the box width.
1063              */
1064             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1065                 maxcheckbox < size.cx)
1066                 maxcheckbox = size.cx;
1067             winheight += height + (height / 2);
1068             break;
1069         }
1070     }
1071
1072     winheight += height + height * 7 / 4;      /* OK / Cancel buttons */
1073
1074     col1l = 2*width;
1075     col1r = col1l + maxlabel;
1076     col2l = col1r + 2*width;
1077     col2r = col2l + 30*width;
1078     if (col2r < col1l+2*height+maxcheckbox)
1079         col2r = col1l+2*height+maxcheckbox;
1080     winwidth = col2r + 2*width;
1081
1082     SelectObject(hdc, oldfont);
1083     ReleaseDC(fe->hwnd, hdc);
1084
1085     /*
1086      * Create the dialog, now that we know its size.
1087      */
1088     {
1089         RECT r, r2;
1090
1091         r.left = r.top = 0;
1092         r.right = winwidth;
1093         r.bottom = winheight;
1094
1095         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
1096                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1097                                 WS_CAPTION | WS_SYSMENU*/) &~
1098                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
1099                            FALSE, 0);
1100
1101         /*
1102          * Centre the dialog on its parent window.
1103          */
1104         r.right -= r.left;
1105         r.bottom -= r.top;
1106         GetWindowRect(fe->hwnd, &r2);
1107         r.left = (r2.left + r2.right - r.right) / 2;
1108         r.top = (r2.top + r2.bottom - r.bottom) / 2;
1109         r.right += r.left;
1110         r.bottom += r.top;
1111
1112         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, title,
1113                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1114                                     WS_CAPTION | WS_SYSMENU,
1115                                     r.left, r.top,
1116                                     r.right-r.left, r.bottom-r.top,
1117                                     fe->hwnd, NULL, fe->inst, NULL);
1118         sfree(title);
1119     }
1120
1121     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
1122
1123     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
1124     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)ConfigDlgProc);
1125
1126     /*
1127      * Count the controls so we can allocate cfgaux.
1128      */
1129     for (nctrls = 0, i = fe->cfg; i->type != C_END; i++)
1130         nctrls++;
1131     fe->cfgaux = snewn(nctrls, struct cfg_aux);
1132
1133     id = 1000;
1134     y = height/2;
1135     for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
1136         switch (i->type) {
1137           case C_STRING:
1138             /*
1139              * Edit box with a label beside it.
1140              */
1141             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1142                    "Static", 0, 0, i->name, id++);
1143             ctl = mkctrl(fe, col2l, col2r, y, y+height*3/2,
1144                          "EDIT", WS_TABSTOP | ES_AUTOHSCROLL,
1145                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1146             SetWindowText(ctl, i->sval);
1147             y += height*3/2;
1148             break;
1149
1150           case C_BOOLEAN:
1151             /*
1152              * Simple checkbox.
1153              */
1154             mkctrl(fe, col1l, col2r, y, y+height, "BUTTON",
1155                    BS_NOTIFY | BS_AUTOCHECKBOX | WS_TABSTOP,
1156                    0, i->name, (j->ctlid = id++));
1157             CheckDlgButton(fe->cfgbox, j->ctlid, (i->ival != 0));
1158             y += height;
1159             break;
1160
1161           case C_CHOICES:
1162             /*
1163              * Drop-down list with a label beside it.
1164              */
1165             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1166                    "STATIC", 0, 0, i->name, id++);
1167             ctl = mkctrl(fe, col2l, col2r, y, y+height*41/2,
1168                          "COMBOBOX", WS_TABSTOP |
1169                          CBS_DROPDOWNLIST | CBS_HASSTRINGS,
1170                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1171             {
1172                 char c, *p, *q, *str;
1173
1174                 SendMessage(ctl, CB_RESETCONTENT, 0, 0);
1175                 p = i->sval;
1176                 c = *p++;
1177                 while (*p) {
1178                     q = p;
1179                     while (*q && *q != c) q++;
1180                     str = snewn(q-p+1, char);
1181                     strncpy(str, p, q-p);
1182                     str[q-p] = '\0';
1183                     SendMessage(ctl, CB_ADDSTRING, 0, (LPARAM)str);
1184                     sfree(str);
1185                     if (*q) q++;
1186                     p = q;
1187                 }
1188             }
1189
1190             SendMessage(ctl, CB_SETCURSEL, i->ival, 0);
1191
1192             y += height*3/2;
1193             break;
1194         }
1195
1196         assert(y < winheight);
1197         y += height/2;
1198     }
1199
1200     y += height/2;                     /* extra space before OK and Cancel */
1201     mkctrl(fe, col1l, (col1l+col2r)/2-width, y, y+height*7/4, "BUTTON",
1202            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
1203            "OK", IDOK);
1204     mkctrl(fe, (col1l+col2r)/2+width, col2r, y, y+height*7/4, "BUTTON",
1205            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP, 0, "Cancel", IDCANCEL);
1206
1207     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
1208
1209     EnableWindow(fe->hwnd, FALSE);
1210     ShowWindow(fe->cfgbox, SW_NORMAL);
1211     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
1212         if (!IsDialogMessage(fe->cfgbox, &msg))
1213             DispatchMessage(&msg);
1214         if (fe->dlg_done)
1215             break;
1216     }
1217     EnableWindow(fe->hwnd, TRUE);
1218     SetForegroundWindow(fe->hwnd);
1219     DestroyWindow(fe->cfgbox);
1220     DeleteObject(fe->cfgfont);
1221
1222     free_cfg(fe->cfg);
1223     sfree(fe->cfgaux);
1224
1225     return (fe->dlg_done == 2);
1226 }
1227
1228 static void new_game_size(frontend *fe)
1229 {
1230     RECT r, sr;
1231     HDC hdc;
1232     int x, y;
1233
1234     x = y = INT_MAX;
1235     midend_size(fe->me, &x, &y, FALSE);
1236
1237     r.left = r.top = 0;
1238     r.right = x;
1239     r.bottom = y;
1240     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
1241                        (WS_THICKFRAME | WS_MAXIMIZEBOX |
1242                         WS_OVERLAPPED),
1243                        TRUE, 0);
1244
1245     if (fe->statusbar != NULL) {
1246         GetWindowRect(fe->statusbar, &sr);
1247     } else {
1248         sr.left = sr.right = sr.top = sr.bottom = 0;
1249     }
1250     SetWindowPos(fe->hwnd, NULL, 0, 0,
1251                  r.right - r.left,
1252                  r.bottom - r.top + sr.bottom - sr.top,
1253                  SWP_NOMOVE | SWP_NOZORDER);
1254
1255     check_window_size(fe, &x, &y);
1256
1257     if (fe->statusbar != NULL)
1258         SetWindowPos(fe->statusbar, NULL, 0, y, x,
1259                      sr.bottom - sr.top, SWP_NOZORDER);
1260
1261     DeleteObject(fe->bitmap);
1262
1263     hdc = GetDC(fe->hwnd);
1264     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
1265     ReleaseDC(fe->hwnd, hdc);
1266
1267     midend_redraw(fe->me);
1268 }
1269
1270 static void new_game_type(frontend *fe)
1271 {
1272     midend_new_game(fe->me);
1273     new_game_size(fe);
1274 }
1275
1276 static int is_alt_pressed(void)
1277 {
1278     BYTE keystate[256];
1279     int r = GetKeyboardState(keystate);
1280     if (!r)
1281         return FALSE;
1282     if (keystate[VK_MENU] & 0x80)
1283         return TRUE;
1284     if (keystate[VK_RMENU] & 0x80)
1285         return TRUE;
1286     return FALSE;
1287 }
1288
1289 static void savefile_write(void *wctx, void *buf, int len)
1290 {
1291     FILE *fp = (FILE *)wctx;
1292     fwrite(buf, 1, len, fp);
1293 }
1294
1295 static int savefile_read(void *wctx, void *buf, int len)
1296 {
1297     FILE *fp = (FILE *)wctx;
1298     int ret;
1299
1300     ret = fread(buf, 1, len, fp);
1301     return (ret == len);
1302 }
1303
1304 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
1305                                 WPARAM wParam, LPARAM lParam)
1306 {
1307     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
1308     int cmd;
1309
1310     switch (message) {
1311       case WM_CLOSE:
1312         DestroyWindow(hwnd);
1313         return 0;
1314       case WM_COMMAND:
1315         cmd = wParam & ~0xF;           /* low 4 bits reserved to Windows */
1316         switch (cmd) {
1317           case IDM_NEW:
1318             if (!midend_process_key(fe->me, 0, 0, 'n'))
1319                 PostQuitMessage(0);
1320             break;
1321           case IDM_RESTART:
1322             midend_restart_game(fe->me);
1323             break;
1324           case IDM_UNDO:
1325             if (!midend_process_key(fe->me, 0, 0, 'u'))
1326                 PostQuitMessage(0);
1327             break;
1328           case IDM_REDO:
1329             if (!midend_process_key(fe->me, 0, 0, '\x12'))
1330                 PostQuitMessage(0);
1331             break;
1332           case IDM_COPY:
1333             {
1334                 char *text = midend_text_format(fe->me);
1335                 if (text)
1336                     write_clip(hwnd, text);
1337                 else
1338                     MessageBeep(MB_ICONWARNING);
1339                 sfree(text);
1340             }
1341             break;
1342           case IDM_SOLVE:
1343             {
1344                 char *msg = midend_solve(fe->me);
1345                 if (msg)
1346                     MessageBox(hwnd, msg, "Unable to solve",
1347                                MB_ICONERROR | MB_OK);
1348             }
1349             break;
1350           case IDM_QUIT:
1351             if (!midend_process_key(fe->me, 0, 0, 'q'))
1352                 PostQuitMessage(0);
1353             break;
1354           case IDM_CONFIG:
1355             if (get_config(fe, CFG_SETTINGS))
1356                 new_game_type(fe);
1357             break;
1358           case IDM_SEED:
1359             if (get_config(fe, CFG_SEED))
1360                 new_game_type(fe);
1361             break;
1362           case IDM_DESC:
1363             if (get_config(fe, CFG_DESC))
1364                 new_game_type(fe);
1365             break;
1366           case IDM_ABOUT:
1367             about(fe);
1368             break;
1369           case IDM_LOAD:
1370           case IDM_SAVE:
1371             {
1372                 OPENFILENAME of;
1373                 char filename[FILENAME_MAX];
1374                 int ret;
1375
1376                 memset(&of, 0, sizeof(of));
1377                 of.hwndOwner = hwnd;
1378                 of.lpstrFilter = "All Files (*.*)\0*\0\0\0";
1379                 of.lpstrCustomFilter = NULL;
1380                 of.nFilterIndex = 1;
1381                 of.lpstrFile = filename;
1382                 filename[0] = '\0';
1383                 of.nMaxFile = lenof(filename);
1384                 of.lpstrFileTitle = NULL;
1385                 of.lpstrTitle = (cmd == IDM_SAVE ?
1386                                  "Enter name of game file to save" :
1387                                  "Enter name of saved game file to load");
1388                 of.Flags = 0;
1389 #ifdef OPENFILENAME_SIZE_VERSION_400
1390                 of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
1391 #else
1392                 of.lStructSize = sizeof(of);
1393 #endif
1394                 of.lpstrInitialDir = NULL;
1395
1396                 if (cmd == IDM_SAVE)
1397                     ret = GetSaveFileName(&of);
1398                 else
1399                     ret = GetOpenFileName(&of);
1400
1401                 if (ret) {
1402                     if (cmd == IDM_SAVE) {
1403                         FILE *fp;
1404
1405                         if ((fp = fopen(filename, "r")) != NULL) {
1406                             char buf[256 + FILENAME_MAX];
1407                             fclose(fp);
1408                             /* file exists */
1409
1410                             sprintf(buf, "Are you sure you want to overwrite"
1411                                     " the file \"%.*s\"?",
1412                                     FILENAME_MAX, filename);
1413                             if (MessageBox(hwnd, buf, "Question",
1414                                            MB_YESNO | MB_ICONQUESTION)
1415                                 != IDYES)
1416                                 break;
1417                         }
1418
1419                         fp = fopen(filename, "w");
1420
1421                         if (!fp) {
1422                             MessageBox(hwnd, "Unable to open save file",
1423                                        "Error", MB_ICONERROR | MB_OK);
1424                             break;
1425                         }
1426
1427                         midend_serialise(fe->me, savefile_write, fp);
1428
1429                         fclose(fp);
1430                     } else {
1431                         FILE *fp = fopen(filename, "r");
1432                         char *err;
1433
1434                         if (!fp) {
1435                             MessageBox(hwnd, "Unable to open saved game file",
1436                                        "Error", MB_ICONERROR | MB_OK);
1437                             break;
1438                         }
1439
1440                         err = midend_deserialise(fe->me, savefile_read, fp);
1441
1442                         fclose(fp);
1443
1444                         if (err) {
1445                             MessageBox(hwnd, err, "Error", MB_ICONERROR|MB_OK);
1446                             break;
1447                         }
1448
1449                         new_game_size(fe);
1450                     }
1451                 }
1452             }
1453
1454             break;
1455           case IDM_HELPC:
1456             assert(fe->help_path);
1457             WinHelp(hwnd, fe->help_path,
1458                     fe->help_has_contents ? HELP_FINDER : HELP_CONTENTS, 0);
1459             break;
1460           case IDM_GAMEHELP:
1461             assert(fe->help_path);
1462             assert(thegame.winhelp_topic);
1463             {
1464                 char *cmd = snewn(10+strlen(thegame.winhelp_topic), char);
1465                 sprintf(cmd, "JI(`',`%s')", thegame.winhelp_topic);
1466                 WinHelp(hwnd, fe->help_path, HELP_COMMAND, (DWORD)cmd);
1467                 sfree(cmd);
1468             }
1469             break;
1470           default:
1471             {
1472                 int p = ((wParam &~ 0xF) - IDM_PRESETS) / 0x10;
1473
1474                 if (p >= 0 && p < fe->npresets) {
1475                     midend_set_params(fe->me, fe->presets[p]);
1476                     new_game_type(fe);
1477                 }
1478             }
1479             break;
1480         }
1481         break;
1482       case WM_DESTROY:
1483         PostQuitMessage(0);
1484         return 0;
1485       case WM_PAINT:
1486         {
1487             PAINTSTRUCT p;
1488             HDC hdc, hdc2;
1489             HBITMAP prevbm;
1490
1491             hdc = BeginPaint(hwnd, &p);
1492             hdc2 = CreateCompatibleDC(hdc);
1493             prevbm = SelectObject(hdc2, fe->bitmap);
1494             BitBlt(hdc,
1495                    p.rcPaint.left, p.rcPaint.top,
1496                    p.rcPaint.right - p.rcPaint.left,
1497                    p.rcPaint.bottom - p.rcPaint.top,
1498                    hdc2,
1499                    p.rcPaint.left, p.rcPaint.top,
1500                    SRCCOPY);
1501             SelectObject(hdc2, prevbm);
1502             DeleteDC(hdc2);
1503             EndPaint(hwnd, &p);
1504         }
1505         return 0;
1506       case WM_KEYDOWN:
1507         {
1508             int key = -1;
1509             BYTE keystate[256];
1510             int r = GetKeyboardState(keystate);
1511             int shift = (r && (keystate[VK_SHIFT] & 0x80)) ? MOD_SHFT : 0;
1512             int ctrl = (r && (keystate[VK_CONTROL] & 0x80)) ? MOD_CTRL : 0;
1513
1514             switch (wParam) {
1515               case VK_LEFT:
1516                 if (!(lParam & 0x01000000))
1517                     key = MOD_NUM_KEYPAD | '4';
1518                 else
1519                     key = shift | ctrl | CURSOR_LEFT;
1520                 break;
1521               case VK_RIGHT:
1522                 if (!(lParam & 0x01000000))
1523                     key = MOD_NUM_KEYPAD | '6';
1524                 else
1525                     key = shift | ctrl | CURSOR_RIGHT;
1526                 break;
1527               case VK_UP:
1528                 if (!(lParam & 0x01000000))
1529                     key = MOD_NUM_KEYPAD | '8';
1530                 else
1531                     key = shift | ctrl | CURSOR_UP;
1532                 break;
1533               case VK_DOWN:
1534                 if (!(lParam & 0x01000000))
1535                     key = MOD_NUM_KEYPAD | '2';
1536                 else
1537                     key = shift | ctrl | CURSOR_DOWN;
1538                 break;
1539                 /*
1540                  * Diagonal keys on the numeric keypad.
1541                  */
1542               case VK_PRIOR:
1543                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '9';
1544                 break;
1545               case VK_NEXT:
1546                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '3';
1547                 break;
1548               case VK_HOME:
1549                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '7';
1550                 break;
1551               case VK_END:
1552                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '1';
1553                 break;
1554               case VK_INSERT:
1555                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '0';
1556                 break;
1557               case VK_CLEAR:
1558                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '5';
1559                 break;
1560                 /*
1561                  * Numeric keypad keys with Num Lock on.
1562                  */
1563               case VK_NUMPAD4: key = MOD_NUM_KEYPAD | '4'; break;
1564               case VK_NUMPAD6: key = MOD_NUM_KEYPAD | '6'; break;
1565               case VK_NUMPAD8: key = MOD_NUM_KEYPAD | '8'; break;
1566               case VK_NUMPAD2: key = MOD_NUM_KEYPAD | '2'; break;
1567               case VK_NUMPAD5: key = MOD_NUM_KEYPAD | '5'; break;
1568               case VK_NUMPAD9: key = MOD_NUM_KEYPAD | '9'; break;
1569               case VK_NUMPAD3: key = MOD_NUM_KEYPAD | '3'; break;
1570               case VK_NUMPAD7: key = MOD_NUM_KEYPAD | '7'; break;
1571               case VK_NUMPAD1: key = MOD_NUM_KEYPAD | '1'; break;
1572               case VK_NUMPAD0: key = MOD_NUM_KEYPAD | '0'; break;
1573             }
1574
1575             if (key != -1) {
1576                 if (!midend_process_key(fe->me, 0, 0, key))
1577                     PostQuitMessage(0);
1578             } else {
1579                 MSG m;
1580                 m.hwnd = hwnd;
1581                 m.message = WM_KEYDOWN;
1582                 m.wParam = wParam;
1583                 m.lParam = lParam & 0xdfff;
1584                 TranslateMessage(&m);
1585             }
1586         }
1587         break;
1588       case WM_LBUTTONDOWN:
1589       case WM_RBUTTONDOWN:
1590       case WM_MBUTTONDOWN:
1591         {
1592             int button;
1593
1594             /*
1595              * Shift-clicks count as middle-clicks, since otherwise
1596              * two-button Windows users won't have any kind of
1597              * middle click to use.
1598              */
1599             if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
1600                 button = MIDDLE_BUTTON;
1601             else if (message == WM_RBUTTONDOWN || is_alt_pressed())
1602                 button = RIGHT_BUTTON;
1603             else
1604                 button = LEFT_BUTTON;
1605
1606             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1607                                     (signed short)HIWORD(lParam), button))
1608                 PostQuitMessage(0);
1609
1610             SetCapture(hwnd);
1611         }
1612         break;
1613       case WM_LBUTTONUP:
1614       case WM_RBUTTONUP:
1615       case WM_MBUTTONUP:
1616         {
1617             int button;
1618
1619             /*
1620              * Shift-clicks count as middle-clicks, since otherwise
1621              * two-button Windows users won't have any kind of
1622              * middle click to use.
1623              */
1624             if (message == WM_MBUTTONUP || (wParam & MK_SHIFT))
1625                 button = MIDDLE_RELEASE;
1626             else if (message == WM_RBUTTONUP || is_alt_pressed())
1627                 button = RIGHT_RELEASE;
1628             else
1629                 button = LEFT_RELEASE;
1630
1631             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1632                                     (signed short)HIWORD(lParam), button))
1633                 PostQuitMessage(0);
1634
1635             ReleaseCapture();
1636         }
1637         break;
1638       case WM_MOUSEMOVE:
1639         {
1640             int button;
1641
1642             if (wParam & (MK_MBUTTON | MK_SHIFT))
1643                 button = MIDDLE_DRAG;
1644             else if (wParam & MK_RBUTTON || is_alt_pressed())
1645                 button = RIGHT_DRAG;
1646             else
1647                 button = LEFT_DRAG;
1648
1649             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1650                                     (signed short)HIWORD(lParam), button))
1651                 PostQuitMessage(0);
1652         }
1653         break;
1654       case WM_CHAR:
1655         if (!midend_process_key(fe->me, 0, 0, (unsigned char)wParam))
1656             PostQuitMessage(0);
1657         return 0;
1658       case WM_TIMER:
1659         if (fe->timer) {
1660             DWORD now = GetTickCount();
1661             float elapsed = (float) (now - fe->timer_last_tickcount) * 0.001F;
1662             midend_timer(fe->me, elapsed);
1663             fe->timer_last_tickcount = now;
1664         }
1665         return 0;
1666     }
1667
1668     return DefWindowProc(hwnd, message, wParam, lParam);
1669 }
1670
1671 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
1672 {
1673     MSG msg;
1674     char *error;
1675
1676     InitCommonControls();
1677
1678     if (!prev) {
1679         WNDCLASS wndclass;
1680
1681         wndclass.style = 0;
1682         wndclass.lpfnWndProc = WndProc;
1683         wndclass.cbClsExtra = 0;
1684         wndclass.cbWndExtra = 0;
1685         wndclass.hInstance = inst;
1686         wndclass.hIcon = LoadIcon(inst, IDI_APPLICATION);
1687         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
1688         wndclass.hbrBackground = NULL;
1689         wndclass.lpszMenuName = NULL;
1690         wndclass.lpszClassName = thegame.name;
1691
1692         RegisterClass(&wndclass);
1693     }
1694
1695     while (*cmdline && isspace((unsigned char)*cmdline))
1696         cmdline++;
1697
1698     if (!new_window(inst, *cmdline ? cmdline : NULL, &error)) {
1699         char buf[128];
1700         sprintf(buf, "%.100s Error", thegame.name);
1701         MessageBox(NULL, error, buf, MB_OK|MB_ICONERROR);
1702         return 1;
1703     }
1704
1705     while (GetMessage(&msg, NULL, 0, 0)) {
1706         DispatchMessage(&msg);
1707     }
1708
1709     return msg.wParam;
1710 }