mdw@git.distorted.org.uk Git - sgt/puzzles/blob - windows.c

   1 /*
   2  * windows.c: Windows front end for my puzzle collection.
   3  */
   4
   5 #include <windows.h>
   6 #include <commctrl.h>
   7 #ifndef NO_HTMLHELP
   8 #include <htmlhelp.h>
   9 #endif /* NO_HTMLHELP */
  10
  11 #include <stdio.h>
  12 #include <assert.h>
  13 #include <ctype.h>
  14 #include <stdarg.h>
  15 #include <stdlib.h>
  16 #include <limits.h>
  17 #include <time.h>
  18
  19 #include "puzzles.h"
  20
  21 #define IDM_NEW       0x0010
  22 #define IDM_RESTART   0x0020
  23 #define IDM_UNDO      0x0030
  24 #define IDM_REDO      0x0040
  25 #define IDM_COPY      0x0050
  26 #define IDM_SOLVE     0x0060
  27 #define IDM_QUIT      0x0070
  28 #define IDM_CONFIG    0x0080
  29 #define IDM_DESC      0x0090
  30 #define IDM_SEED      0x00A0
  31 #define IDM_HELPC     0x00B0
  32 #define IDM_GAMEHELP  0x00C0
  33 #define IDM_ABOUT     0x00D0
  34 #define IDM_SAVE      0x00E0
  35 #define IDM_LOAD      0x00F0
  36 #define IDM_PRINT     0x0100
  37 #define IDM_PRESETS   0x0110
  38
  39 #define HELP_FILE_NAME  "puzzles.hlp"
  40 #define HELP_CNT_NAME   "puzzles.cnt"
  41 #ifndef NO_HTMLHELP
  42 #define CHM_FILE_NAME   "puzzles.chm"
  43 #endif /* NO_HTMLHELP */
  44
  45 #ifndef NO_HTMLHELP
  46 typedef HWND (CALLBACK *htmlhelp_t)(HWND, LPCSTR, UINT, DWORD);
  47 static htmlhelp_t htmlhelp;
  48 static HINSTANCE hh_dll;
  49 #endif /* NO_HTMLHELP */
  50 enum { NONE, HLP, CHM } help_type;
  51 char *help_path;
  52 const char *help_topic;
  53 int help_has_contents;
  54
  55 #ifdef DEBUGGING
  56 static FILE *debug_fp = NULL;
  57 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
  58 static int debug_got_console = 0;
  59
  60 void dputs(char *buf)
  61 {
  62     DWORD dw;
  63
  64     if (!debug_got_console) {
  65         if (AllocConsole()) {
  66             debug_got_console = 1;
  67             debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
  68         }
  69     }
  70     if (!debug_fp) {
  71         debug_fp = fopen("debug.log", "w");
  72     }
  73
  74     if (debug_hdl != INVALID_HANDLE_VALUE) {
  75         WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
  76     }
  77     fputs(buf, debug_fp);
  78     fflush(debug_fp);
  79 }
  80
  81 void debug_printf(char *fmt, ...)
  82 {
  83     char buf[4096];
  84     va_list ap;
  85
  86     va_start(ap, fmt);
  87     vsprintf(buf, fmt, ap);
  88     dputs(buf);
  89     va_end(ap);
  90 }
  91 #endif
  92
  93 #define WINFLAGS (WS_OVERLAPPEDWINDOW &~ \
  94                       (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED))
  95
  96 static void new_game_size(frontend *fe);
  97
  98 struct font {
  99     HFONT font;
 100     int type;
 101     int size;
 102 };
 103
 104 struct cfg_aux {
 105     int ctlid;
 106 };
 107
 108 struct blitter {
 109     HBITMAP bitmap;
 110     frontend *fe;
 111     int x, y, w, h;
 112 };
 113
 114 enum { CFG_PRINT = CFG_FRONTEND_SPECIFIC };
 115
 116 struct frontend {
 117     midend *me;
 118     HWND hwnd, statusbar, cfgbox;
 119     HINSTANCE inst;
 120     HBITMAP bitmap, prevbm;
 121     HDC hdc;
 122     COLORREF *colours;
 123     HBRUSH *brushes;
 124     HPEN *pens;
 125     HRGN clip;
 126     UINT timer;
 127     DWORD timer_last_tickcount;
 128     int npresets;
 129     game_params **presets;
 130     struct font *fonts;
 131     int nfonts, fontsize;
 132     config_item *cfg;
 133     struct cfg_aux *cfgaux;
 134     int cfg_which, dlg_done;
 135     HFONT cfgfont;
 136     HBRUSH oldbr;
 137     HPEN oldpen;
 138     int help_running;
 139     enum { DRAWING, PRINTING, NOTHING } drawstatus;
 140     DOCINFO di;
 141     int printcount, printw, printh, printsolns, printcurr, printcolour;
 142     float printscale;
 143     int printoffsetx, printoffsety;
 144     float printpixelscale;
 145     int fontstart;
 146     int linewidth;
 147     drawing *dr;
 148 };
 149
 150 void fatal(char *fmt, ...)
 151 {
 152     char buf[2048];
 153     va_list ap;
 154
 155     va_start(ap, fmt);
 156     vsprintf(buf, fmt, ap);
 157     va_end(ap);
 158
 159     MessageBox(NULL, buf, "Fatal error", MB_ICONEXCLAMATION | MB_OK);
 160
 161     exit(1);
 162 }
 163
 164 char *geterrstr(void)
 165 {
 166     LPVOID lpMsgBuf;
 167     DWORD dw = GetLastError();
 168     char *ret;
 169
 170     FormatMessage(
 171         FORMAT_MESSAGE_ALLOCATE_BUFFER |
 172         FORMAT_MESSAGE_FROM_SYSTEM,
 173         NULL,
 174         dw,
 175         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
 176         (LPTSTR) &lpMsgBuf,
 177         0, NULL );
 178
 179     ret = dupstr(lpMsgBuf);
 180
 181     LocalFree(lpMsgBuf);
 182
 183     return ret;
 184 }
 185
 186 void get_random_seed(void **randseed, int *randseedsize)
 187 {
 188     time_t *tp = snew(time_t);
 189     time(tp);
 190     *randseed = (void *)tp;
 191     *randseedsize = sizeof(time_t);
 192 }
 193
 194 static void win_status_bar(void *handle, char *text)
 195 {
 196     frontend *fe = (frontend *)handle;
 197
 198     SetWindowText(fe->statusbar, text);
 199 }
 200
 201 static blitter *win_blitter_new(void *handle, int w, int h)
 202 {
 203     blitter *bl = snew(blitter);
 204
 205     memset(bl, 0, sizeof(blitter));
 206     bl->w = w;
 207     bl->h = h;
 208     bl->bitmap = 0;
 209
 210     return bl;
 211 }
 212
 213 static void win_blitter_free(void *handle, blitter *bl)
 214 {
 215     if (bl->bitmap) DeleteObject(bl->bitmap);
 216     sfree(bl);
 217 }
 218
 219 static void blitter_mkbitmap(frontend *fe, blitter *bl)
 220 {
 221     HDC hdc = GetDC(fe->hwnd);
 222     bl->bitmap = CreateCompatibleBitmap(hdc, bl->w, bl->h);
 223     ReleaseDC(fe->hwnd, hdc);
 224 }
 225
 226 /* BitBlt(dstDC, dstX, dstY, dstW, dstH, srcDC, srcX, srcY, dType) */
 227
 228 static void win_blitter_save(void *handle, blitter *bl, int x, int y)
 229 {
 230     frontend *fe = (frontend *)handle;
 231     HDC hdc_win, hdc_blit;
 232     HBITMAP prev_blit;
 233
 234     assert(fe->drawstatus == DRAWING);
 235
 236     if (!bl->bitmap) blitter_mkbitmap(fe, bl);
 237
 238     bl->x = x; bl->y = y;
 239
 240     hdc_win = GetDC(fe->hwnd);
 241     hdc_blit = CreateCompatibleDC(hdc_win);
 242     if (!hdc_blit) fatal("hdc_blit failed: 0x%x", GetLastError());
 243
 244     prev_blit = SelectObject(hdc_blit, bl->bitmap);
 245     if (prev_blit == NULL || prev_blit == HGDI_ERROR)
 246         fatal("SelectObject for hdc_main failed: 0x%x", GetLastError());
 247
 248     if (!BitBlt(hdc_blit, 0, 0, bl->w, bl->h,
 249                 fe->hdc, x, y, SRCCOPY))
 250         fatal("BitBlt failed: 0x%x", GetLastError());
 251
 252     SelectObject(hdc_blit, prev_blit);
 253     DeleteDC(hdc_blit);
 254     ReleaseDC(fe->hwnd, hdc_win);
 255 }
 256
 257 static void win_blitter_load(void *handle, blitter *bl, int x, int y)
 258 {
 259     frontend *fe = (frontend *)handle;
 260     HDC hdc_win, hdc_blit;
 261     HBITMAP prev_blit;
 262
 263     assert(fe->drawstatus == DRAWING);
 264
 265     assert(bl->bitmap); /* we should always have saved before loading */
 266
 267     if (x == BLITTER_FROMSAVED) x = bl->x;
 268     if (y == BLITTER_FROMSAVED) y = bl->y;
 269
 270     hdc_win = GetDC(fe->hwnd);
 271     hdc_blit = CreateCompatibleDC(hdc_win);
 272
 273     prev_blit = SelectObject(hdc_blit, bl->bitmap);
 274
 275     BitBlt(fe->hdc, x, y, bl->w, bl->h,
 276            hdc_blit, 0, 0, SRCCOPY);
 277
 278     SelectObject(hdc_blit, prev_blit);
 279     DeleteDC(hdc_blit);
 280     ReleaseDC(fe->hwnd, hdc_win);
 281 }
 282
 283 void frontend_default_colour(frontend *fe, float *output)
 284 {
 285     DWORD c = GetSysColor(COLOR_MENU); /* ick */
 286
 287     output[0] = (float)(GetRValue(c) / 255.0);
 288     output[1] = (float)(GetGValue(c) / 255.0);
 289     output[2] = (float)(GetBValue(c) / 255.0);
 290 }
 291
 292 static POINT win_transform_point(frontend *fe, int x, int y)
 293 {
 294     POINT ret;
 295
 296     assert(fe->drawstatus != NOTHING);
 297
 298     if (fe->drawstatus == PRINTING) {
 299         ret.x = (int)(fe->printoffsetx + fe->printpixelscale * x);
 300         ret.y = (int)(fe->printoffsety + fe->printpixelscale * y);
 301     } else {
 302         ret.x = x;
 303         ret.y = y;
 304     }
 305
 306     return ret;
 307 }
 308
 309 static void win_text_colour(frontend *fe, int colour)
 310 {
 311     assert(fe->drawstatus != NOTHING);
 312
 313     if (fe->drawstatus == PRINTING) {
 314         int hatch;
 315         float r, g, b;
 316         print_get_colour(fe->dr, colour, &hatch, &r, &g, &b);
 317         if (fe->printcolour)
 318             SetTextColor(fe->hdc, RGB(r * 255, g * 255, b * 255));
 319         else
 320             SetTextColor(fe->hdc,
 321                          hatch == HATCH_CLEAR ? RGB(255,255,255) : RGB(0,0,0));
 322     } else {
 323         SetTextColor(fe->hdc, fe->colours[colour]);
 324     }
 325 }
 326
 327 static void win_set_brush(frontend *fe, int colour)
 328 {
 329     HBRUSH br;
 330     assert(fe->drawstatus != NOTHING);
 331
 332     if (fe->drawstatus == PRINTING) {
 333         int hatch;
 334         float r, g, b;
 335         print_get_colour(fe->dr, colour, &hatch, &r, &g, &b);
 336
 337         if (fe->printcolour)
 338             br = CreateSolidBrush(RGB(r * 255, g * 255, b * 255));
 339         else if (hatch == HATCH_SOLID)
 340             br = CreateSolidBrush(RGB(0,0,0));
 341         else if (hatch == HATCH_CLEAR)
 342             br = CreateSolidBrush(RGB(255,255,255));
 343         else
 344             br = CreateHatchBrush(hatch == HATCH_BACKSLASH ? HS_FDIAGONAL :
 345                                   hatch == HATCH_SLASH ? HS_BDIAGONAL :
 346                                   hatch == HATCH_HORIZ ? HS_HORIZONTAL :
 347                                   hatch == HATCH_VERT ? HS_VERTICAL :
 348                                   hatch == HATCH_PLUS ? HS_CROSS :
 349                                   /* hatch == HATCH_X ? */ HS_DIAGCROSS,
 350                                   RGB(0,0,0));
 351     } else {
 352         br = fe->brushes[colour];
 353     }
 354     fe->oldbr = SelectObject(fe->hdc, br);
 355 }
 356
 357 static void win_reset_brush(frontend *fe)
 358 {
 359     HBRUSH br;
 360
 361     assert(fe->drawstatus != NOTHING);
 362
 363     br = SelectObject(fe->hdc, fe->oldbr);
 364     if (fe->drawstatus == PRINTING)
 365         DeleteObject(br);
 366 }
 367
 368 static void win_set_pen(frontend *fe, int colour, int thin)
 369 {
 370     HPEN pen;
 371     assert(fe->drawstatus != NOTHING);
 372
 373     if (fe->drawstatus == PRINTING) {
 374         int hatch;
 375         float r, g, b;
 376         int width = thin ? 0 : fe->linewidth;
 377
 378         print_get_colour(fe->dr, colour, &hatch, &r, &g, &b);
 379         if (fe->printcolour)
 380             pen = CreatePen(PS_SOLID, width,
 381                             RGB(r * 255, g * 255, b * 255));
 382         else if (hatch == HATCH_SOLID)
 383             pen = CreatePen(PS_SOLID, width, RGB(0, 0, 0));
 384         else if (hatch == HATCH_CLEAR)
 385             pen = CreatePen(PS_SOLID, width, RGB(255,255,255));
 386         else {
 387             assert(!"This shouldn't happen");
 388             pen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
 389         }
 390     } else {
 391         pen = fe->pens[colour];
 392     }
 393     fe->oldpen = SelectObject(fe->hdc, pen);
 394 }
 395
 396 static void win_reset_pen(frontend *fe)
 397 {
 398     HPEN pen;
 399
 400     assert(fe->drawstatus != NOTHING);
 401
 402     pen = SelectObject(fe->hdc, fe->oldpen);
 403     if (fe->drawstatus == PRINTING)
 404         DeleteObject(pen);
 405 }
 406
 407 static void win_clip(void *handle, int x, int y, int w, int h)
 408 {
 409     frontend *fe = (frontend *)handle;
 410     POINT p, q;
 411
 412     if (fe->drawstatus == NOTHING)
 413         return;
 414
 415     p = win_transform_point(fe, x, y);
 416     q = win_transform_point(fe, x+w, y+h);
 417     IntersectClipRect(fe->hdc, p.x, p.y, q.x, q.y);
 418 }
 419
 420 static void win_unclip(void *handle)
 421 {
 422     frontend *fe = (frontend *)handle;
 423
 424     if (fe->drawstatus == NOTHING)
 425         return;
 426
 427     SelectClipRgn(fe->hdc, NULL);
 428 }
 429
 430 static void win_draw_text(void *handle, int x, int y, int fonttype,
 431                           int fontsize, int align, int colour, char *text)
 432 {
 433     frontend *fe = (frontend *)handle;
 434     POINT xy;
 435     int i;
 436
 437     if (fe->drawstatus == NOTHING)
 438         return;
 439
 440     if (fe->drawstatus == PRINTING)
 441         fontsize = (int)(fontsize * fe->printpixelscale);
 442
 443     xy = win_transform_point(fe, x, y);
 444
 445     /*
 446      * Find or create the font.
 447      */
 448     for (i = fe->fontstart; i < fe->nfonts; i++)
 449         if (fe->fonts[i].type == fonttype && fe->fonts[i].size == fontsize)
 450             break;
 451
 452     if (i == fe->nfonts) {
 453         if (fe->fontsize <= fe->nfonts) {
 454             fe->fontsize = fe->nfonts + 10;
 455             fe->fonts = sresize(fe->fonts, fe->fontsize, struct font);
 456         }
 457
 458         fe->nfonts++;
 459
 460         fe->fonts[i].type = fonttype;
 461         fe->fonts[i].size = fontsize;
 462
 463         fe->fonts[i].font = CreateFont(-fontsize, 0, 0, 0,
 464                                        fe->drawstatus == PRINTING ? 0 : FW_BOLD,
 465                                        FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 466                                        OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 467                                        DEFAULT_QUALITY,
 468                                        (fonttype == FONT_FIXED ?
 469                                         FIXED_PITCH | FF_DONTCARE :
 470                                         VARIABLE_PITCH | FF_SWISS),
 471                                        NULL);
 472     }
 473
 474     /*
 475      * Position and draw the text.
 476      */
 477     {
 478         HFONT oldfont;
 479         TEXTMETRIC tm;
 480         SIZE size;
 481
 482         oldfont = SelectObject(fe->hdc, fe->fonts[i].font);
 483         if (GetTextMetrics(fe->hdc, &tm)) {
 484             if (align & ALIGN_VCENTRE)
 485                 xy.y -= (tm.tmAscent+tm.tmDescent)/2;
 486             else
 487                 xy.y -= tm.tmAscent;
 488         }
 489         if (GetTextExtentPoint32(fe->hdc, text, strlen(text), &size)) {
 490             if (align & ALIGN_HCENTRE)
 491                 xy.x -= size.cx / 2;
 492             else if (align & ALIGN_HRIGHT)
 493                 xy.x -= size.cx;
 494         }
 495         SetBkMode(fe->hdc, TRANSPARENT);
 496         win_text_colour(fe, colour);
 497         TextOut(fe->hdc, xy.x, xy.y, text, strlen(text));
 498         SelectObject(fe->hdc, oldfont);
 499     }
 500 }
 501
 502 static void win_draw_rect(void *handle, int x, int y, int w, int h, int colour)
 503 {
 504     frontend *fe = (frontend *)handle;
 505     POINT p, q;
 506
 507     if (fe->drawstatus == NOTHING)
 508         return;
 509
 510     if (fe->drawstatus == DRAWING && w == 1 && h == 1) {
 511         /*
 512          * Rectangle() appears to get uppity if asked to draw a 1x1
 513          * rectangle, presumably on the grounds that that's beneath
 514          * its dignity and you ought to be using SetPixel instead.
 515          * So I will.
 516          */
 517         SetPixel(fe->hdc, x, y, fe->colours[colour]);
 518     } else {
 519         win_set_brush(fe, colour);
 520         win_set_pen(fe, colour, TRUE);
 521         p = win_transform_point(fe, x, y);
 522         q = win_transform_point(fe, x+w, y+h);
 523         Rectangle(fe->hdc, p.x, p.y, q.x, q.y);
 524         win_reset_brush(fe);
 525         win_reset_pen(fe);
 526     }
 527 }
 528
 529 static void win_draw_line(void *handle, int x1, int y1, int x2, int y2, int colour)
 530 {
 531     frontend *fe = (frontend *)handle;
 532     POINT p, q;
 533
 534     if (fe->drawstatus == NOTHING)
 535         return;
 536
 537     win_set_pen(fe, colour, FALSE);
 538     p = win_transform_point(fe, x1, y1);
 539     q = win_transform_point(fe, x2, y2);
 540     MoveToEx(fe->hdc, p.x, p.y, NULL);
 541     LineTo(fe->hdc, q.x, q.y);
 542     if (fe->drawstatus == DRAWING)
 543         SetPixel(fe->hdc, q.x, q.y, fe->colours[colour]);
 544     win_reset_pen(fe);
 545 }
 546
 547 static void win_draw_circle(void *handle, int cx, int cy, int radius,
 548                             int fillcolour, int outlinecolour)
 549 {
 550     frontend *fe = (frontend *)handle;
 551     POINT p, q, r;
 552
 553     assert(outlinecolour >= 0);
 554
 555     if (fe->drawstatus == NOTHING)
 556         return;
 557
 558     if (fillcolour >= 0) {
 559         win_set_brush(fe, fillcolour);
 560         win_set_pen(fe, outlinecolour, FALSE);
 561         p = win_transform_point(fe, cx - radius, cy - radius);
 562         q = win_transform_point(fe, cx + radius, cy + radius);
 563         Ellipse(fe->hdc, p.x, p.y, q.x+1, q.y+1);
 564         win_reset_brush(fe);
 565         win_reset_pen(fe);
 566     } else {
 567         win_set_pen(fe, outlinecolour, FALSE);
 568         p = win_transform_point(fe, cx - radius, cy - radius);
 569         q = win_transform_point(fe, cx + radius, cy + radius);
 570         r = win_transform_point(fe, cx - radius, cy);
 571         Arc(fe->hdc, p.x, p.y, q.x+1, q.y+1, r.x, r.y, r.x, r.y);
 572         win_reset_pen(fe);
 573     }
 574 }
 575
 576 static void win_draw_polygon(void *handle, int *coords, int npoints,
 577                              int fillcolour, int outlinecolour)
 578 {
 579     frontend *fe = (frontend *)handle;
 580     POINT *pts;
 581     int i;
 582
 583     if (fe->drawstatus == NOTHING)
 584         return;
 585
 586     pts = snewn(npoints+1, POINT);
 587
 588     for (i = 0; i <= npoints; i++) {
 589         int j = (i < npoints ? i : 0);
 590         pts[i] = win_transform_point(fe, coords[j*2], coords[j*2+1]);
 591     }
 592
 593     assert(outlinecolour >= 0);
 594
 595     if (fillcolour >= 0) {
 596         win_set_brush(fe, fillcolour);
 597         win_set_pen(fe, outlinecolour, FALSE);
 598         Polygon(fe->hdc, pts, npoints);
 599         win_reset_brush(fe);
 600         win_reset_pen(fe);
 601     } else {
 602         win_set_pen(fe, outlinecolour, FALSE);
 603         Polyline(fe->hdc, pts, npoints+1);
 604         win_reset_pen(fe);
 605     }
 606
 607     sfree(pts);
 608 }
 609
 610 static void win_start_draw(void *handle)
 611 {
 612     frontend *fe = (frontend *)handle;
 613     HDC hdc_win;
 614
 615     assert(fe->drawstatus == NOTHING);
 616
 617     hdc_win = GetDC(fe->hwnd);
 618     fe->hdc = CreateCompatibleDC(hdc_win);
 619     fe->prevbm = SelectObject(fe->hdc, fe->bitmap);
 620     ReleaseDC(fe->hwnd, hdc_win);
 621     fe->clip = NULL;
 622     SetMapMode(fe->hdc, MM_TEXT);
 623     fe->drawstatus = DRAWING;
 624 }
 625
 626 static void win_draw_update(void *handle, int x, int y, int w, int h)
 627 {
 628     frontend *fe = (frontend *)handle;
 629     RECT r;
 630
 631     if (fe->drawstatus != DRAWING)
 632         return;
 633
 634     r.left = x;
 635     r.top = y;
 636     r.right = x + w;
 637     r.bottom = y + h;
 638
 639     InvalidateRect(fe->hwnd, &r, FALSE);
 640 }
 641
 642 static void win_end_draw(void *handle)
 643 {
 644     frontend *fe = (frontend *)handle;
 645     assert(fe->drawstatus == DRAWING);
 646     SelectObject(fe->hdc, fe->prevbm);
 647     DeleteDC(fe->hdc);
 648     if (fe->clip) {
 649         DeleteObject(fe->clip);
 650         fe->clip = NULL;
 651     }
 652     fe->drawstatus = NOTHING;
 653 }
 654
 655 static void win_line_width(void *handle, float width)
 656 {
 657     frontend *fe = (frontend *)handle;
 658
 659     assert(fe->drawstatus != DRAWING);
 660     if (fe->drawstatus == NOTHING)
 661         return;
 662
 663     fe->linewidth = (int)(width * fe->printpixelscale);
 664 }
 665
 666 static void win_begin_doc(void *handle, int pages)
 667 {
 668     frontend *fe = (frontend *)handle;
 669
 670     assert(fe->drawstatus != DRAWING);
 671     if (fe->drawstatus == NOTHING)
 672         return;
 673
 674     if (StartDoc(fe->hdc, &fe->di) <= 0) {
 675         char *e = geterrstr();
 676         MessageBox(fe->hwnd, e, "Error starting to print",
 677                    MB_ICONERROR | MB_OK);
 678         sfree(e);
 679         fe->drawstatus = NOTHING;
 680     }
 681
 682     /*
 683      * Push a marker on the font stack so that we won't use the
 684      * same fonts for printing and drawing. (This is because
 685      * drawing seems to look generally better in bold, but printing
 686      * is better not in bold.)
 687      */
 688     fe->fontstart = fe->nfonts;
 689 }
 690
 691 static void win_begin_page(void *handle, int number)
 692 {
 693     frontend *fe = (frontend *)handle;
 694
 695     assert(fe->drawstatus != DRAWING);
 696     if (fe->drawstatus == NOTHING)
 697         return;
 698
 699     if (StartPage(fe->hdc) <= 0) {
 700         char *e = geterrstr();
 701         MessageBox(fe->hwnd, e, "Error starting a page",
 702                    MB_ICONERROR | MB_OK);
 703         sfree(e);
 704         fe->drawstatus = NOTHING;
 705     }
 706 }
 707
 708 static void win_begin_puzzle(void *handle, float xm, float xc,
 709                              float ym, float yc, int pw, int ph, float wmm)
 710 {
 711     frontend *fe = (frontend *)handle;
 712     int ppw, pph, pox, poy;
 713     float mmpw, mmph, mmox, mmoy;
 714     float scale;
 715
 716     assert(fe->drawstatus != DRAWING);
 717     if (fe->drawstatus == NOTHING)
 718         return;
 719
 720     ppw = GetDeviceCaps(fe->hdc, HORZRES);
 721     pph = GetDeviceCaps(fe->hdc, VERTRES);
 722     mmpw = (float)GetDeviceCaps(fe->hdc, HORZSIZE);
 723     mmph = (float)GetDeviceCaps(fe->hdc, VERTSIZE);
 724
 725     /*
 726      * Compute the puzzle's position on the logical page.
 727      */
 728     mmox = xm * mmpw + xc;
 729     mmoy = ym * mmph + yc;
 730
 731     /*
 732      * Work out what that comes to in pixels.
 733      */
 734     pox = (int)(mmox * (float)ppw / mmpw);
 735     poy = (int)(mmoy * (float)ppw / mmpw);
 736
 737     /*
 738      * And determine the scale.
 739      *
 740      * I need a scale such that the maximum puzzle-coordinate
 741      * extent of the rectangle (pw * scale) is equal to the pixel
 742      * equivalent of the puzzle's millimetre width (wmm * ppw /
 743      * mmpw).
 744      */
 745     scale = (wmm * ppw) / (mmpw * pw);
 746
 747     /*
 748      * Now store pox, poy and scale for use in the main drawing
 749      * functions.
 750      */
 751     fe->printoffsetx = pox;
 752     fe->printoffsety = poy;
 753     fe->printpixelscale = scale;
 754
 755     fe->linewidth = 1;
 756 }
 757
 758 static void win_end_puzzle(void *handle)
 759 {
 760     /* Nothing needs to be done here. */
 761 }
 762
 763 static void win_end_page(void *handle, int number)
 764 {
 765     frontend *fe = (frontend *)handle;
 766
 767     assert(fe->drawstatus != DRAWING);
 768
 769     if (fe->drawstatus == NOTHING)
 770         return;
 771
 772     if (EndPage(fe->hdc) <= 0) {
 773         char *e = geterrstr();
 774         MessageBox(fe->hwnd, e, "Error finishing a page",
 775                    MB_ICONERROR | MB_OK);
 776         sfree(e);
 777         fe->drawstatus = NOTHING;
 778     }
 779 }
 780
 781 static void win_end_doc(void *handle)
 782 {
 783     frontend *fe = (frontend *)handle;
 784
 785     assert(fe->drawstatus != DRAWING);
 786
 787     /*
 788      * Free all the fonts created since we began printing.
 789      */
 790     while (fe->nfonts > fe->fontstart) {
 791         fe->nfonts--;
 792         DeleteObject(fe->fonts[fe->nfonts].font);
 793     }
 794     fe->fontstart = 0;
 795
 796     /*
 797      * The MSDN web site sample code doesn't bother to call EndDoc
 798      * if an error occurs half way through printing. I expect doing
 799      * so would cause the erroneous document to actually be
 800      * printed, or something equally undesirable.
 801      */
 802     if (fe->drawstatus == NOTHING)
 803         return;
 804
 805     if (EndDoc(fe->hdc) <= 0) {
 806         char *e = geterrstr();
 807         MessageBox(fe->hwnd, e, "Error finishing printing",
 808                    MB_ICONERROR | MB_OK);
 809         sfree(e);
 810         fe->drawstatus = NOTHING;
 811     }
 812 }
 813
 814 const struct drawing_api win_drawing = {
 815     win_draw_text,
 816     win_draw_rect,
 817     win_draw_line,
 818     win_draw_polygon,
 819     win_draw_circle,
 820     win_draw_update,
 821     win_clip,
 822     win_unclip,
 823     win_start_draw,
 824     win_end_draw,
 825     win_status_bar,
 826     win_blitter_new,
 827     win_blitter_free,
 828     win_blitter_save,
 829     win_blitter_load,
 830     win_begin_doc,
 831     win_begin_page,
 832     win_begin_puzzle,
 833     win_end_puzzle,
 834     win_end_page,
 835     win_end_doc,
 836     win_line_width,
 837 };
 838
 839 void print(frontend *fe)
 840 {
 841     PRINTDLG pd;
 842     char doctitle[256];
 843     document *doc;
 844     midend *nme = NULL;  /* non-interactive midend for bulk puzzle generation */
 845     int i;
 846     char *err = NULL;
 847
 848     /*
 849      * Create our document structure and fill it up with puzzles.
 850      */
 851     doc = document_new(fe->printw, fe->printh, fe->printscale / 100.0F);
 852     for (i = 0; i < fe->printcount; i++) {
 853         if (i == 0 && fe->printcurr) {
 854             err = midend_print_puzzle(fe->me, doc, fe->printsolns);
 855         } else {
 856             if (!nme) {
 857                 game_params *params;
 858
 859                 nme = midend_new(NULL, &thegame, NULL, NULL);
 860
 861                 /*
 862                  * Set the non-interactive mid-end to have the same
 863                  * parameters as the standard one.
 864                  */
 865                 params = midend_get_params(fe->me);
 866                 midend_set_params(nme, params);
 867                 thegame.free_params(params);
 868             }
 869
 870             midend_new_game(nme);
 871             err = midend_print_puzzle(nme, doc, fe->printsolns);
 872         }
 873         if (err)
 874             break;
 875     }
 876     if (nme)
 877         midend_free(nme);
 878
 879     if (err) {
 880         MessageBox(fe->hwnd, err, "Error preparing puzzles for printing",
 881                    MB_ICONERROR | MB_OK);
 882         document_free(doc);
 883         return;
 884     }
 885
 886     memset(&pd, 0, sizeof(pd));
 887     pd.lStructSize = sizeof(pd);
 888     pd.hwndOwner = fe->hwnd;
 889     pd.hDevMode = NULL;
 890     pd.hDevNames = NULL;
 891     pd.Flags = PD_USEDEVMODECOPIESANDCOLLATE | PD_RETURNDC |
 892         PD_NOPAGENUMS | PD_NOSELECTION;
 893     pd.nCopies = 1;
 894     pd.nFromPage = pd.nToPage = 0xFFFF;
 895     pd.nMinPage = pd.nMaxPage = 1;
 896
 897     if (!PrintDlg(&pd)) {
 898         document_free(doc);
 899         return;
 900     }
 901
 902     /*
 903      * Now pd.hDC is a device context for the printer.
 904      */
 905
 906     /*
 907      * FIXME: IWBNI we put up an Abort box here.
 908      */
 909
 910     memset(&fe->di, 0, sizeof(fe->di));
 911     fe->di.cbSize = sizeof(fe->di);
 912     sprintf(doctitle, "Printed puzzles from %s (from Simon Tatham's"
 913             " Portable Puzzle Collection)", thegame.name);
 914     fe->di.lpszDocName = doctitle;
 915     fe->di.lpszOutput = NULL;
 916     fe->di.lpszDatatype = NULL;
 917     fe->di.fwType = 0;
 918
 919     fe->drawstatus = PRINTING;
 920     fe->hdc = pd.hDC;
 921
 922     fe->dr = drawing_new(&win_drawing, NULL, fe);
 923     document_print(doc, fe->dr);
 924     drawing_free(fe->dr);
 925     fe->dr = NULL;
 926
 927     fe->drawstatus = NOTHING;
 928
 929     DeleteDC(pd.hDC);
 930     document_free(doc);
 931 }
 932
 933 void deactivate_timer(frontend *fe)
 934 {
 935     if (!fe)
 936         return;                        /* for non-interactive midend */
 937     if (fe->hwnd) KillTimer(fe->hwnd, fe->timer);
 938     fe->timer = 0;
 939 }
 940
 941 void activate_timer(frontend *fe)
 942 {
 943     if (!fe)
 944         return;                        /* for non-interactive midend */
 945     if (!fe->timer) {
 946         fe->timer = SetTimer(fe->hwnd, fe->timer, 20, NULL);
 947         fe->timer_last_tickcount = GetTickCount();
 948     }
 949 }
 950
 951 void write_clip(HWND hwnd, char *data)
 952 {
 953     HGLOBAL clipdata;
 954     int len, i, j;
 955     char *data2;
 956     void *lock;
 957
 958     /*
 959      * Windows expects CRLF in the clipboard, so we must convert
 960      * any \n that has come out of the puzzle backend.
 961      */
 962     len = 0;
 963     for (i = 0; data[i]; i++) {
 964         if (data[i] == '\n')
 965             len++;
 966         len++;
 967     }
 968     data2 = snewn(len+1, char);
 969     j = 0;
 970     for (i = 0; data[i]; i++) {
 971         if (data[i] == '\n')
 972             data2[j++] = '\r';
 973         data2[j++] = data[i];
 974     }
 975     assert(j == len);
 976     data2[j] = '\0';
 977
 978     clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len + 1);
 979     if (!clipdata)
 980         return;
 981     lock = GlobalLock(clipdata);
 982     if (!lock)
 983         return;
 984     memcpy(lock, data2, len);
 985     ((unsigned char *) lock)[len] = 0;
 986     GlobalUnlock(clipdata);
 987
 988     if (OpenClipboard(hwnd)) {
 989         EmptyClipboard();
 990         SetClipboardData(CF_TEXT, clipdata);
 991         CloseClipboard();
 992     } else
 993         GlobalFree(clipdata);
 994
 995     sfree(data2);
 996 }
 997
 998 /*
 999  * Set up Help and see if we can find a help file.
1000  */
1001 static void init_help(void)
1002 {
1003     char b[2048], *p, *q, *r;
1004     FILE *fp;
1005
1006     /*
1007      * Find the executable file path, so we can look alongside
1008      * it for help files. Trim the filename off the end.
1009      */
1010     GetModuleFileName(NULL, b, sizeof(b) - 1);
1011     r = b;
1012     p = strrchr(b, '\\');
1013     if (p && p >= r) r = p+1;
1014     q = strrchr(b, ':');
1015     if (q && q >= r) r = q+1;
1016
1017 #ifndef NO_HTMLHELP
1018     /*
1019      * Try HTML Help first.
1020      */
1021     strcpy(r, CHM_FILE_NAME);
1022     if ( (fp = fopen(b, "r")) != NULL) {
1023         fclose(fp);
1024
1025         /*
1026          * We have a .CHM. See if we can use it.
1027          */
1028         hh_dll = LoadLibrary("hhctrl.ocx");
1029         if (hh_dll) {
1030             htmlhelp = (htmlhelp_t)GetProcAddress(hh_dll, "HtmlHelpA");
1031             if (!htmlhelp)
1032                 FreeLibrary(hh_dll);
1033         }
1034         if (htmlhelp) {
1035             help_path = dupstr(b);
1036             help_type = CHM;
1037             help_topic = thegame.htmlhelp_topic;
1038             return;
1039         }
1040     }
1041 #endif /* NO_HTMLHELP */
1042
1043     /*
1044      * Now try old-style .HLP.
1045      */
1046     strcpy(r, HELP_FILE_NAME);
1047     if ( (fp = fopen(b, "r")) != NULL) {
1048         fclose(fp);
1049
1050         help_path = dupstr(b);
1051         help_type = HLP;
1052
1053         help_topic = thegame.winhelp_topic;
1054
1055         /*
1056          * See if there's a .CNT file alongside it.
1057          */
1058         strcpy(r, HELP_CNT_NAME);
1059         if ( (fp = fopen(b, "r")) != NULL) {
1060             fclose(fp);
1061             help_has_contents = TRUE;
1062         } else
1063             help_has_contents = FALSE;
1064
1065         return;
1066     }
1067
1068     help_type = NONE;          /* didn't find any */
1069 }
1070
1071 /*
1072  * Start Help.
1073  */
1074 static void start_help(frontend *fe, const char *topic)
1075 {
1076     char *str = NULL;
1077     int cmd;
1078
1079     switch (help_type) {
1080       case HLP:
1081         assert(help_path);
1082         if (topic) {
1083             str = snewn(10+strlen(topic), char);
1084             sprintf(str, "JI(`',`%s')", topic);
1085             cmd = HELP_COMMAND;
1086         } else if (help_has_contents) {
1087             cmd = HELP_FINDER;
1088         } else {
1089             cmd = HELP_CONTENTS;
1090         }
1091         WinHelp(fe->hwnd, help_path, cmd, (DWORD)str);
1092         fe->help_running = TRUE;
1093         break;
1094       case CHM:
1095 #ifndef NO_HTMLHELP
1096         assert(help_path);
1097         assert(htmlhelp);
1098         if (topic) {
1099             str = snewn(20 + strlen(topic) + strlen(help_path), char);
1100             sprintf(str, "%s::/%s.html>main", help_path, topic);
1101         } else {
1102             str = dupstr(help_path);
1103         }
1104         htmlhelp(fe->hwnd, str, HH_DISPLAY_TOPIC, 0);
1105         fe->help_running = TRUE;
1106         break;
1107 #endif /* NO_HTMLHELP */
1108       case NONE:
1109         assert(!"This shouldn't happen");
1110         break;
1111     }
1112
1113     sfree(str);
1114 }
1115
1116 /*
1117  * Stop Help on window cleanup.
1118  */
1119 static void stop_help(frontend *fe)
1120 {
1121     if (fe->help_running) {
1122         switch (help_type) {
1123           case HLP:
1124             WinHelp(fe->hwnd, help_path, HELP_QUIT, 0);
1125             break;
1126           case CHM:
1127 #ifndef NO_HTMLHELP
1128             assert(htmlhelp);
1129             htmlhelp(NULL, NULL, HH_CLOSE_ALL, 0);
1130             break;
1131 #endif /* NO_HTMLHELP */
1132           case NONE:
1133             assert(!"This shouldn't happen");
1134             break;
1135         }
1136         fe->help_running = FALSE;
1137     }
1138 }
1139
1140 /*
1141  * Terminate Help on process exit.
1142  */
1143 static void cleanup_help(void)
1144 {
1145     /* Nothing to do currently.
1146      * (If we were running HTML Help single-threaded, this is where we'd
1147      * call HH_UNINITIALIZE.) */
1148 }
1149
1150 static void check_window_size(frontend *fe, int *px, int *py)
1151 {
1152     RECT r;
1153     int x, y, sy;
1154
1155     if (fe->statusbar) {
1156         RECT sr;
1157         GetWindowRect(fe->statusbar, &sr);
1158         sy = sr.bottom - sr.top;
1159     } else {
1160         sy = 0;
1161     }
1162
1163     /*
1164      * See if we actually got the window size we wanted, and adjust
1165      * the puzzle size if not.
1166      */
1167     GetClientRect(fe->hwnd, &r);
1168     x = r.right - r.left;
1169     y = r.bottom - r.top - sy;
1170     midend_size(fe->me, &x, &y, FALSE);
1171     if (x != r.right - r.left || y != r.bottom - r.top) {
1172         /*
1173          * Resize the window, now we know what size we _really_
1174          * want it to be.
1175          */
1176         r.left = r.top = 0;
1177         r.right = x;
1178         r.bottom = y + sy;
1179         AdjustWindowRectEx(&r, WINFLAGS, TRUE, 0);
1180         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left, r.bottom - r.top,
1181                      SWP_NOMOVE | SWP_NOZORDER);
1182     }
1183
1184     if (fe->statusbar) {
1185         GetClientRect(fe->hwnd, &r);
1186         SetWindowPos(fe->statusbar, NULL, 0, r.bottom-r.top-sy, r.right-r.left,
1187                      sy, SWP_NOZORDER);
1188     }
1189
1190     *px = x;
1191     *py = y;
1192 }
1193
1194 static void get_max_puzzle_size(frontend *fe, int *x, int *y)
1195 {
1196     RECT r, sr;
1197
1198     if (SystemParametersInfo(SPI_GETWORKAREA, 0, &sr, FALSE)) {
1199         *x = sr.right - sr.left;
1200         *y = sr.bottom - sr.top;
1201         r.left = 100;
1202         r.right = 200;
1203         r.top = 100;
1204         r.bottom = 200;
1205         AdjustWindowRectEx(&r, WINFLAGS, TRUE, 0);
1206         *x -= r.right - r.left - 100;
1207         *y -= r.bottom - r.top - 100;
1208     } else {
1209         *x = *y = INT_MAX;
1210     }
1211
1212     if (fe->statusbar != NULL) {
1213         GetWindowRect(fe->statusbar, &sr);
1214         *y -= sr.bottom - sr.top;
1215     }
1216 }
1217
1218 static frontend *new_window(HINSTANCE inst, char *game_id, char **error)
1219 {
1220     frontend *fe;
1221     int x, y;
1222     RECT r;
1223
1224     fe = snew(frontend);
1225
1226     fe->me = midend_new(fe, &thegame, &win_drawing, fe);
1227
1228     if (game_id) {
1229         *error = midend_game_id(fe->me, game_id);
1230         if (*error) {
1231             midend_free(fe->me);
1232             sfree(fe);
1233             return NULL;
1234         }
1235     }
1236
1237     fe->inst = inst;
1238
1239     fe->timer = 0;
1240     fe->hwnd = NULL;
1241
1242     fe->help_running = FALSE;
1243
1244     fe->drawstatus = NOTHING;
1245     fe->dr = NULL;
1246     fe->fontstart = 0;
1247
1248     midend_new_game(fe->me);
1249
1250     fe->fonts = NULL;
1251     fe->nfonts = fe->fontsize = 0;
1252
1253     {
1254         int i, ncolours;
1255         float *colours;
1256
1257         colours = midend_colours(fe->me, &ncolours);
1258
1259         fe->colours = snewn(ncolours, COLORREF);
1260         fe->brushes = snewn(ncolours, HBRUSH);
1261         fe->pens = snewn(ncolours, HPEN);
1262
1263         for (i = 0; i < ncolours; i++) {
1264             fe->colours[i] = RGB(255 * colours[i*3+0],
1265                                  255 * colours[i*3+1],
1266                                  255 * colours[i*3+2]);
1267             fe->brushes[i] = CreateSolidBrush(fe->colours[i]);
1268             fe->pens[i] = CreatePen(PS_SOLID, 1, fe->colours[i]);
1269         }
1270         sfree(colours);
1271     }
1272
1273     if (midend_wants_statusbar(fe->me)) {
1274         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
1275                                        WS_CHILD | WS_VISIBLE,
1276                                        0, 0, 0, 0, /* status bar does these */
1277                                        NULL, NULL, inst, NULL);
1278     } else
1279         fe->statusbar = NULL;
1280
1281     get_max_puzzle_size(fe, &x, &y);
1282     midend_size(fe->me, &x, &y, FALSE);
1283
1284     r.left = r.top = 0;
1285     r.right = x;
1286     r.bottom = y;
1287     AdjustWindowRectEx(&r, WINFLAGS, TRUE, 0);
1288
1289     fe->hwnd = CreateWindowEx(0, thegame.name, thegame.name,
1290                               WS_OVERLAPPEDWINDOW &~
1291                               (WS_THICKFRAME | WS_MAXIMIZEBOX),
1292                               CW_USEDEFAULT, CW_USEDEFAULT,
1293                               r.right - r.left, r.bottom - r.top,
1294                               NULL, NULL, inst, NULL);
1295
1296     if (midend_wants_statusbar(fe->me)) {
1297         RECT sr;
1298         DestroyWindow(fe->statusbar);
1299         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
1300                                        WS_CHILD | WS_VISIBLE,
1301                                        0, 0, 0, 0, /* status bar does these */
1302                                        fe->hwnd, NULL, inst, NULL);
1303         /*
1304          * Now resize the window to take account of the status bar.
1305          */
1306         GetWindowRect(fe->statusbar, &sr);
1307         GetWindowRect(fe->hwnd, &r);
1308         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left,
1309                      r.bottom - r.top + sr.bottom - sr.top,
1310                      SWP_NOMOVE | SWP_NOZORDER);
1311     } else {
1312         fe->statusbar = NULL;
1313     }
1314
1315     {
1316         HMENU bar = CreateMenu();
1317         HMENU menu = CreateMenu();
1318
1319         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Game");
1320         AppendMenu(menu, MF_ENABLED, IDM_NEW, "New");
1321         AppendMenu(menu, MF_ENABLED, IDM_RESTART, "Restart");
1322         AppendMenu(menu, MF_ENABLED, IDM_DESC, "Specific...");
1323         AppendMenu(menu, MF_ENABLED, IDM_SEED, "Random Seed...");
1324
1325         if ((fe->npresets = midend_num_presets(fe->me)) > 0 ||
1326             thegame.can_configure) {
1327             HMENU sub = CreateMenu();
1328             int i;
1329
1330             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)sub, "Type");
1331
1332             fe->presets = snewn(fe->npresets, game_params *);
1333
1334             for (i = 0; i < fe->npresets; i++) {
1335                 char *name;
1336
1337                 midend_fetch_preset(fe->me, i, &name, &fe->presets[i]);
1338
1339                 /*
1340                  * FIXME: we ought to go through and do something
1341                  * with ampersands here.
1342                  */
1343
1344                 AppendMenu(sub, MF_ENABLED, IDM_PRESETS + 0x10 * i, name);
1345             }
1346
1347             if (thegame.can_configure) {
1348                 AppendMenu(sub, MF_ENABLED, IDM_CONFIG, "Custom...");
1349             }
1350         }
1351
1352         AppendMenu(menu, MF_SEPARATOR, 0, 0);
1353         AppendMenu(menu, MF_ENABLED, IDM_LOAD, "Load...");
1354         AppendMenu(menu, MF_ENABLED, IDM_SAVE, "Save...");
1355         AppendMenu(menu, MF_SEPARATOR, 0, 0);
1356         if (thegame.can_print) {
1357             AppendMenu(menu, MF_ENABLED, IDM_PRINT, "Print...");
1358             AppendMenu(menu, MF_SEPARATOR, 0, 0);
1359         }
1360         AppendMenu(menu, MF_ENABLED, IDM_UNDO, "Undo");
1361         AppendMenu(menu, MF_ENABLED, IDM_REDO, "Redo");
1362         if (thegame.can_format_as_text) {
1363             AppendMenu(menu, MF_SEPARATOR, 0, 0);
1364             AppendMenu(menu, MF_ENABLED, IDM_COPY, "Copy");
1365         }
1366         if (thegame.can_solve) {
1367             AppendMenu(menu, MF_SEPARATOR, 0, 0);
1368             AppendMenu(menu, MF_ENABLED, IDM_SOLVE, "Solve");
1369         }
1370         AppendMenu(menu, MF_SEPARATOR, 0, 0);
1371         AppendMenu(menu, MF_ENABLED, IDM_QUIT, "Exit");
1372         menu = CreateMenu();
1373         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Help");
1374         AppendMenu(menu, MF_ENABLED, IDM_ABOUT, "About");
1375         if (help_type != NONE) {
1376             AppendMenu(menu, MF_SEPARATOR, 0, 0);
1377             AppendMenu(menu, MF_ENABLED, IDM_HELPC, "Contents");
1378             if (help_topic) {
1379                 char *item;
1380                 assert(thegame.name);
1381                 item = snewn(9+strlen(thegame.name), char); /*ick*/
1382                 sprintf(item, "Help on %s", thegame.name);
1383                 AppendMenu(menu, MF_ENABLED, IDM_GAMEHELP, item);
1384                 sfree(item);
1385             }
1386         }
1387         SetMenu(fe->hwnd, bar);
1388     }
1389
1390     fe->bitmap = NULL;
1391     new_game_size(fe); /* initialises fe->bitmap */
1392     check_window_size(fe, &x, &y);
1393
1394     SetWindowLong(fe->hwnd, GWL_USERDATA, (LONG)fe);
1395
1396     ShowWindow(fe->hwnd, SW_NORMAL);
1397     SetForegroundWindow(fe->hwnd);
1398
1399     midend_redraw(fe->me);
1400
1401     return fe;
1402 }
1403
1404 static int CALLBACK AboutDlgProc(HWND hwnd, UINT msg,
1405                                  WPARAM wParam, LPARAM lParam)
1406 {
1407     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
1408
1409     switch (msg) {
1410       case WM_INITDIALOG:
1411         return 0;
1412
1413       case WM_COMMAND:
1414         if ((HIWORD(wParam) == BN_CLICKED ||
1415              HIWORD(wParam) == BN_DOUBLECLICKED) &&
1416             LOWORD(wParam) == IDOK)
1417             fe->dlg_done = 1;
1418         return 0;
1419
1420       case WM_CLOSE:
1421         fe->dlg_done = 1;
1422         return 0;
1423     }
1424
1425     return 0;
1426 }
1427
1428 /*
1429  * Wrappers on midend_{get,set}_config, which extend the CFG_*
1430  * enumeration to add CFG_PRINT.
1431  */
1432 static config_item *frontend_get_config(frontend *fe, int which,
1433                                         char **wintitle)
1434 {
1435     if (which < CFG_FRONTEND_SPECIFIC) {
1436         return midend_get_config(fe->me, which, wintitle);
1437     } else if (which == CFG_PRINT) {
1438         config_item *ret;
1439         int i;
1440
1441         *wintitle = snewn(40 + strlen(thegame.name), char);
1442         sprintf(*wintitle, "%s print setup", thegame.name);
1443
1444         ret = snewn(8, config_item);
1445
1446         i = 0;
1447
1448         ret[i].name = "Number of puzzles to print";
1449         ret[i].type = C_STRING;
1450         ret[i].sval = dupstr("1");
1451         ret[i].ival = 0;
1452         i++;
1453
1454         ret[i].name = "Number of puzzles across the page";
1455         ret[i].type = C_STRING;
1456         ret[i].sval = dupstr("1");
1457         ret[i].ival = 0;
1458         i++;
1459
1460         ret[i].name = "Number of puzzles down the page";
1461         ret[i].type = C_STRING;
1462         ret[i].sval = dupstr("1");
1463         ret[i].ival = 0;
1464         i++;
1465
1466         ret[i].name = "Percentage of standard size";
1467         ret[i].type = C_STRING;
1468         ret[i].sval = dupstr("100.0");
1469         ret[i].ival = 0;
1470         i++;
1471
1472         ret[i].name = "Include currently shown puzzle";
1473         ret[i].type = C_BOOLEAN;
1474         ret[i].sval = NULL;
1475         ret[i].ival = TRUE;
1476         i++;
1477
1478         ret[i].name = "Print solutions";
1479         ret[i].type = C_BOOLEAN;
1480         ret[i].sval = NULL;
1481         ret[i].ival = FALSE;
1482         i++;
1483
1484         if (thegame.can_print_in_colour) {
1485             ret[i].name = "Print in colour";
1486             ret[i].type = C_BOOLEAN;
1487             ret[i].sval = NULL;
1488             ret[i].ival = FALSE;
1489             i++;
1490         }
1491
1492         ret[i].name = NULL;
1493         ret[i].type = C_END;
1494         ret[i].sval = NULL;
1495         ret[i].ival = 0;
1496         i++;
1497
1498         return ret;
1499     } else {
1500         assert(!"We should never get here");
1501         return NULL;
1502     }
1503 }
1504
1505 static char *frontend_set_config(frontend *fe, int which, config_item *cfg)
1506 {
1507     if (which < CFG_FRONTEND_SPECIFIC) {
1508         return midend_set_config(fe->me, which, cfg);
1509     } else if (which == CFG_PRINT) {
1510         if ((fe->printcount = atoi(cfg[0].sval)) <= 0)
1511             return "Number of puzzles to print should be at least one";
1512         if ((fe->printw = atoi(cfg[1].sval)) <= 0)
1513             return "Number of puzzles across the page should be at least one";
1514         if ((fe->printh = atoi(cfg[2].sval)) <= 0)
1515             return "Number of puzzles down the page should be at least one";
1516         if ((fe->printscale = (float)atof(cfg[3].sval)) <= 0)
1517             return "Print size should be positive";
1518         fe->printcurr = cfg[4].ival;
1519         fe->printsolns = cfg[5].ival;
1520         fe->printcolour = thegame.can_print_in_colour && cfg[6].ival;
1521         return NULL;
1522     } else {
1523         assert(!"We should never get here");
1524         return "Internal error";
1525     }
1526 }
1527
1528 static int CALLBACK ConfigDlgProc(HWND hwnd, UINT msg,
1529                                   WPARAM wParam, LPARAM lParam)
1530 {
1531     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
1532     config_item *i;
1533     struct cfg_aux *j;
1534
1535     switch (msg) {
1536       case WM_INITDIALOG:
1537         return 0;
1538
1539       case WM_COMMAND:
1540         /*
1541          * OK and Cancel are special cases.
1542          */
1543         if ((HIWORD(wParam) == BN_CLICKED ||
1544              HIWORD(wParam) == BN_DOUBLECLICKED) &&
1545             (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)) {
1546             if (LOWORD(wParam) == IDOK) {
1547                 char *err = frontend_set_config(fe, fe->cfg_which, fe->cfg);
1548
1549                 if (err) {
1550                     MessageBox(hwnd, err, "Validation error",
1551                                MB_ICONERROR | MB_OK);
1552                 } else {
1553                     fe->dlg_done = 2;
1554                 }
1555             } else {
1556                 fe->dlg_done = 1;
1557             }
1558             return 0;
1559         }
1560
1561         /*
1562          * First find the control whose id this is.
1563          */
1564         for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
1565             if (j->ctlid == LOWORD(wParam))
1566                 break;
1567         }
1568         if (i->type == C_END)
1569             return 0;                  /* not our problem */
1570
1571         if (i->type == C_STRING && HIWORD(wParam) == EN_CHANGE) {
1572             char buffer[4096];
1573             GetDlgItemText(fe->cfgbox, j->ctlid, buffer, lenof(buffer));
1574             buffer[lenof(buffer)-1] = '\0';
1575             sfree(i->sval);
1576             i->sval = dupstr(buffer);
1577         } else if (i->type == C_BOOLEAN &&
1578                    (HIWORD(wParam) == BN_CLICKED ||
1579                     HIWORD(wParam) == BN_DOUBLECLICKED)) {
1580             i->ival = IsDlgButtonChecked(fe->cfgbox, j->ctlid);
1581         } else if (i->type == C_CHOICES &&
1582                    HIWORD(wParam) == CBN_SELCHANGE) {
1583             i->ival = SendDlgItemMessage(fe->cfgbox, j->ctlid,
1584                                          CB_GETCURSEL, 0, 0);
1585         }
1586
1587         return 0;
1588
1589       case WM_CLOSE:
1590         fe->dlg_done = 1;
1591         return 0;
1592     }
1593
1594     return 0;
1595 }
1596
1597 HWND mkctrl(frontend *fe, int x1, int x2, int y1, int y2,
1598             char *wclass, int wstyle,
1599             int exstyle, const char *wtext, int wid)
1600 {
1601     HWND ret;
1602     ret = CreateWindowEx(exstyle, wclass, wtext,
1603                          wstyle | WS_CHILD | WS_VISIBLE, x1, y1, x2-x1, y2-y1,
1604                          fe->cfgbox, (HMENU) wid, fe->inst, NULL);
1605     SendMessage(ret, WM_SETFONT, (WPARAM)fe->cfgfont, MAKELPARAM(TRUE, 0));
1606     return ret;
1607 }
1608
1609 static void about(frontend *fe)
1610 {
1611     int i;
1612     WNDCLASS wc;
1613     MSG msg;
1614     TEXTMETRIC tm;
1615     HDC hdc;
1616     HFONT oldfont;
1617     SIZE size;
1618     int gm, id;
1619     int winwidth, winheight, y;
1620     int height, width, maxwid;
1621     const char *strings[16];
1622     int lengths[16];
1623     int nstrings = 0;
1624     char titlebuf[512];
1625
1626     sprintf(titlebuf, "About %.250s", thegame.name);
1627
1628     strings[nstrings++] = thegame.name;
1629     strings[nstrings++] = "from Simon Tatham's Portable Puzzle Collection";
1630     strings[nstrings++] = ver;
1631
1632     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
1633     wc.lpfnWndProc = DefDlgProc;
1634     wc.cbClsExtra = 0;
1635     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
1636     wc.hInstance = fe->inst;
1637     wc.hIcon = NULL;
1638     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
1639     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
1640     wc.lpszMenuName = NULL;
1641     wc.lpszClassName = "GameAboutBox";
1642     RegisterClass(&wc);
1643
1644     hdc = GetDC(fe->hwnd);
1645     SetMapMode(hdc, MM_TEXT);
1646
1647     fe->dlg_done = FALSE;
1648
1649     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
1650                              0, 0, 0, 0,
1651                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
1652                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
1653                              DEFAULT_QUALITY,
1654                              FF_SWISS,
1655                              "MS Shell Dlg");
1656
1657     oldfont = SelectObject(hdc, fe->cfgfont);
1658     if (GetTextMetrics(hdc, &tm)) {
1659         height = tm.tmAscent + tm.tmDescent;
1660         width = tm.tmAveCharWidth;
1661     } else {
1662         height = width = 30;
1663     }
1664
1665     /*
1666      * Figure out the layout of the About box by measuring the
1667      * length of each piece of text.
1668      */
1669     maxwid = 0;
1670     winheight = height/2;
1671
1672     for (i = 0; i < nstrings; i++) {
1673         if (GetTextExtentPoint32(hdc, strings[i], strlen(strings[i]), &size))
1674             lengths[i] = size.cx;
1675         else
1676             lengths[i] = 0;            /* *shrug* */
1677         if (maxwid < lengths[i])
1678             maxwid = lengths[i];
1679         winheight += height * 3 / 2 + (height / 2);
1680     }
1681
1682     winheight += height + height * 7 / 4;      /* OK button */
1683     winwidth = maxwid + 4*width;
1684
1685     SelectObject(hdc, oldfont);
1686     ReleaseDC(fe->hwnd, hdc);
1687
1688     /*
1689      * Create the dialog, now that we know its size.
1690      */
1691     {
1692         RECT r, r2;
1693
1694         r.left = r.top = 0;
1695         r.right = winwidth;
1696         r.bottom = winheight;
1697
1698         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
1699                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1700                                 WS_CAPTION | WS_SYSMENU*/) &~
1701                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
1702                            FALSE, 0);
1703
1704         /*
1705          * Centre the dialog on its parent window.
1706          */
1707         r.right -= r.left;
1708         r.bottom -= r.top;
1709         GetWindowRect(fe->hwnd, &r2);
1710         r.left = (r2.left + r2.right - r.right) / 2;
1711         r.top = (r2.top + r2.bottom - r.bottom) / 2;
1712         r.right += r.left;
1713         r.bottom += r.top;
1714
1715         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, titlebuf,
1716                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1717                                     WS_CAPTION | WS_SYSMENU,
1718                                     r.left, r.top,
1719                                     r.right-r.left, r.bottom-r.top,
1720                                     fe->hwnd, NULL, fe->inst, NULL);
1721     }
1722
1723     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
1724
1725     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
1726     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)AboutDlgProc);
1727
1728     id = 1000;
1729     y = height/2;
1730     for (i = 0; i < nstrings; i++) {
1731         int border = width*2 + (maxwid - lengths[i]) / 2;
1732         mkctrl(fe, border, border+lengths[i], y+height*1/8, y+height*9/8,
1733                "Static", 0, 0, strings[i], id++);
1734         y += height*3/2;
1735
1736         assert(y < winheight);
1737         y += height/2;
1738     }
1739
1740     y += height/2;                     /* extra space before OK */
1741     mkctrl(fe, width*2, maxwid+width*2, y, y+height*7/4, "BUTTON",
1742            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
1743            "OK", IDOK);
1744
1745     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
1746
1747     EnableWindow(fe->hwnd, FALSE);
1748     ShowWindow(fe->cfgbox, SW_NORMAL);
1749     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
1750         if (!IsDialogMessage(fe->cfgbox, &msg))
1751             DispatchMessage(&msg);
1752         if (fe->dlg_done)
1753             break;
1754     }
1755     EnableWindow(fe->hwnd, TRUE);
1756     SetForegroundWindow(fe->hwnd);
1757     DestroyWindow(fe->cfgbox);
1758     DeleteObject(fe->cfgfont);
1759 }
1760
1761 static int get_config(frontend *fe, int which)
1762 {
1763     config_item *i;
1764     struct cfg_aux *j;
1765     char *title;
1766     WNDCLASS wc;
1767     MSG msg;
1768     TEXTMETRIC tm;
1769     HDC hdc;
1770     HFONT oldfont;
1771     SIZE size;
1772     HWND ctl;
1773     int gm, id, nctrls;
1774     int winwidth, winheight, col1l, col1r, col2l, col2r, y;
1775     int height, width, maxlabel, maxcheckbox;
1776
1777     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
1778     wc.lpfnWndProc = DefDlgProc;
1779     wc.cbClsExtra = 0;
1780     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
1781     wc.hInstance = fe->inst;
1782     wc.hIcon = NULL;
1783     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
1784     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
1785     wc.lpszMenuName = NULL;
1786     wc.lpszClassName = "GameConfigBox";
1787     RegisterClass(&wc);
1788
1789     hdc = GetDC(fe->hwnd);
1790     SetMapMode(hdc, MM_TEXT);
1791
1792     fe->dlg_done = FALSE;
1793
1794     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
1795                              0, 0, 0, 0,
1796                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
1797                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
1798                              DEFAULT_QUALITY,
1799                              FF_SWISS,
1800                              "MS Shell Dlg");
1801
1802     oldfont = SelectObject(hdc, fe->cfgfont);
1803     if (GetTextMetrics(hdc, &tm)) {
1804         height = tm.tmAscent + tm.tmDescent;
1805         width = tm.tmAveCharWidth;
1806     } else {
1807         height = width = 30;
1808     }
1809
1810     fe->cfg = frontend_get_config(fe, which, &title);
1811     fe->cfg_which = which;
1812
1813     /*
1814      * Figure out the layout of the config box by measuring the
1815      * length of each piece of text.
1816      */
1817     maxlabel = maxcheckbox = 0;
1818     winheight = height/2;
1819
1820     for (i = fe->cfg; i->type != C_END; i++) {
1821         switch (i->type) {
1822           case C_STRING:
1823           case C_CHOICES:
1824             /*
1825              * Both these control types have a label filling only
1826              * the left-hand column of the box.
1827              */
1828             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1829                 maxlabel < size.cx)
1830                 maxlabel = size.cx;
1831             winheight += height * 3 / 2 + (height / 2);
1832             break;
1833
1834           case C_BOOLEAN:
1835             /*
1836              * Checkboxes take up the whole of the box width.
1837              */
1838             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1839                 maxcheckbox < size.cx)
1840                 maxcheckbox = size.cx;
1841             winheight += height + (height / 2);
1842             break;
1843         }
1844     }
1845
1846     winheight += height + height * 7 / 4;      /* OK / Cancel buttons */
1847
1848     col1l = 2*width;
1849     col1r = col1l + maxlabel;
1850     col2l = col1r + 2*width;
1851     col2r = col2l + 30*width;
1852     if (col2r < col1l+2*height+maxcheckbox)
1853         col2r = col1l+2*height+maxcheckbox;
1854     winwidth = col2r + 2*width;
1855
1856     SelectObject(hdc, oldfont);
1857     ReleaseDC(fe->hwnd, hdc);
1858
1859     /*
1860      * Create the dialog, now that we know its size.
1861      */
1862     {
1863         RECT r, r2;
1864
1865         r.left = r.top = 0;
1866         r.right = winwidth;
1867         r.bottom = winheight;
1868
1869         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
1870                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1871                                 WS_CAPTION | WS_SYSMENU*/) &~
1872                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
1873                            FALSE, 0);
1874
1875         /*
1876          * Centre the dialog on its parent window.
1877          */
1878         r.right -= r.left;
1879         r.bottom -= r.top;
1880         GetWindowRect(fe->hwnd, &r2);
1881         r.left = (r2.left + r2.right - r.right) / 2;
1882         r.top = (r2.top + r2.bottom - r.bottom) / 2;
1883         r.right += r.left;
1884         r.bottom += r.top;
1885
1886         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, title,
1887                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1888                                     WS_CAPTION | WS_SYSMENU,
1889                                     r.left, r.top,
1890                                     r.right-r.left, r.bottom-r.top,
1891                                     fe->hwnd, NULL, fe->inst, NULL);
1892         sfree(title);
1893     }
1894
1895     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
1896
1897     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
1898     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)ConfigDlgProc);
1899
1900     /*
1901      * Count the controls so we can allocate cfgaux.
1902      */
1903     for (nctrls = 0, i = fe->cfg; i->type != C_END; i++)
1904         nctrls++;
1905     fe->cfgaux = snewn(nctrls, struct cfg_aux);
1906
1907     id = 1000;
1908     y = height/2;
1909     for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
1910         switch (i->type) {
1911           case C_STRING:
1912             /*
1913              * Edit box with a label beside it.
1914              */
1915             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1916                    "Static", 0, 0, i->name, id++);
1917             ctl = mkctrl(fe, col2l, col2r, y, y+height*3/2,
1918                          "EDIT", WS_TABSTOP | ES_AUTOHSCROLL,
1919                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1920             SetWindowText(ctl, i->sval);
1921             y += height*3/2;
1922             break;
1923
1924           case C_BOOLEAN:
1925             /*
1926              * Simple checkbox.
1927              */
1928             mkctrl(fe, col1l, col2r, y, y+height, "BUTTON",
1929                    BS_NOTIFY | BS_AUTOCHECKBOX | WS_TABSTOP,
1930                    0, i->name, (j->ctlid = id++));
1931             CheckDlgButton(fe->cfgbox, j->ctlid, (i->ival != 0));
1932             y += height;
1933             break;
1934
1935           case C_CHOICES:
1936             /*
1937              * Drop-down list with a label beside it.
1938              */
1939             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1940                    "STATIC", 0, 0, i->name, id++);
1941             ctl = mkctrl(fe, col2l, col2r, y, y+height*41/2,
1942                          "COMBOBOX", WS_TABSTOP |
1943                          CBS_DROPDOWNLIST | CBS_HASSTRINGS,
1944                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1945             {
1946                 char c, *p, *q, *str;
1947
1948                 SendMessage(ctl, CB_RESETCONTENT, 0, 0);
1949                 p = i->sval;
1950                 c = *p++;
1951                 while (*p) {
1952                     q = p;
1953                     while (*q && *q != c) q++;
1954                     str = snewn(q-p+1, char);
1955                     strncpy(str, p, q-p);
1956                     str[q-p] = '\0';
1957                     SendMessage(ctl, CB_ADDSTRING, 0, (LPARAM)str);
1958                     sfree(str);
1959                     if (*q) q++;
1960                     p = q;
1961                 }
1962             }
1963
1964             SendMessage(ctl, CB_SETCURSEL, i->ival, 0);
1965
1966             y += height*3/2;
1967             break;
1968         }
1969
1970         assert(y < winheight);
1971         y += height/2;
1972     }
1973
1974     y += height/2;                     /* extra space before OK and Cancel */
1975     mkctrl(fe, col1l, (col1l+col2r)/2-width, y, y+height*7/4, "BUTTON",
1976            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
1977            "OK", IDOK);
1978     mkctrl(fe, (col1l+col2r)/2+width, col2r, y, y+height*7/4, "BUTTON",
1979            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP, 0, "Cancel", IDCANCEL);
1980
1981     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
1982
1983     EnableWindow(fe->hwnd, FALSE);
1984     ShowWindow(fe->cfgbox, SW_NORMAL);
1985     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
1986         if (!IsDialogMessage(fe->cfgbox, &msg))
1987             DispatchMessage(&msg);
1988         if (fe->dlg_done)
1989             break;
1990     }
1991     EnableWindow(fe->hwnd, TRUE);
1992     SetForegroundWindow(fe->hwnd);
1993     DestroyWindow(fe->cfgbox);
1994     DeleteObject(fe->cfgfont);
1995
1996     free_cfg(fe->cfg);
1997     sfree(fe->cfgaux);
1998
1999     return (fe->dlg_done == 2);
2000 }
2001
2002 static void new_game_size(frontend *fe)
2003 {
2004     RECT r, sr;
2005     HDC hdc;
2006     int x, y;
2007
2008     get_max_puzzle_size(fe, &x, &y);
2009     midend_size(fe->me, &x, &y, FALSE);
2010
2011     r.left = r.top = 0;
2012     r.right = x;
2013     r.bottom = y;
2014     AdjustWindowRectEx(&r, WINFLAGS, TRUE, 0);
2015
2016     if (fe->statusbar != NULL) {
2017         GetWindowRect(fe->statusbar, &sr);
2018     } else {
2019         sr.left = sr.right = sr.top = sr.bottom = 0;
2020     }
2021     SetWindowPos(fe->hwnd, NULL, 0, 0,
2022                  r.right - r.left,
2023                  r.bottom - r.top + sr.bottom - sr.top,
2024                  SWP_NOMOVE | SWP_NOZORDER);
2025
2026     check_window_size(fe, &x, &y);
2027
2028     if (fe->statusbar != NULL)
2029         SetWindowPos(fe->statusbar, NULL, 0, y, x,
2030                      sr.bottom - sr.top, SWP_NOZORDER);
2031
2032     if (fe->bitmap) DeleteObject(fe->bitmap);
2033
2034     hdc = GetDC(fe->hwnd);
2035     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
2036     ReleaseDC(fe->hwnd, hdc);
2037
2038     midend_redraw(fe->me);
2039 }
2040
2041 static void new_game_type(frontend *fe)
2042 {
2043     midend_new_game(fe->me);
2044     new_game_size(fe);
2045 }
2046
2047 static int is_alt_pressed(void)
2048 {
2049     BYTE keystate[256];
2050     int r = GetKeyboardState(keystate);
2051     if (!r)
2052         return FALSE;
2053     if (keystate[VK_MENU] & 0x80)
2054         return TRUE;
2055     if (keystate[VK_RMENU] & 0x80)
2056         return TRUE;
2057     return FALSE;
2058 }
2059
2060 static void savefile_write(void *wctx, void *buf, int len)
2061 {
2062     FILE *fp = (FILE *)wctx;
2063     fwrite(buf, 1, len, fp);
2064 }
2065
2066 static int savefile_read(void *wctx, void *buf, int len)
2067 {
2068     FILE *fp = (FILE *)wctx;
2069     int ret;
2070
2071     ret = fread(buf, 1, len, fp);
2072     return (ret == len);
2073 }
2074
2075 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
2076                                 WPARAM wParam, LPARAM lParam)
2077 {
2078     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
2079     int cmd;
2080
2081     switch (message) {
2082       case WM_CLOSE:
2083         DestroyWindow(hwnd);
2084         return 0;
2085       case WM_COMMAND:
2086         cmd = wParam & ~0xF;           /* low 4 bits reserved to Windows */
2087         switch (cmd) {
2088           case IDM_NEW:
2089             if (!midend_process_key(fe->me, 0, 0, 'n'))
2090                 PostQuitMessage(0);
2091             break;
2092           case IDM_RESTART:
2093             midend_restart_game(fe->me);
2094             break;
2095           case IDM_UNDO:
2096             if (!midend_process_key(fe->me, 0, 0, 'u'))
2097                 PostQuitMessage(0);
2098             break;
2099           case IDM_REDO:
2100             if (!midend_process_key(fe->me, 0, 0, '\x12'))
2101                 PostQuitMessage(0);
2102             break;
2103           case IDM_COPY:
2104             {
2105                 char *text = midend_text_format(fe->me);
2106                 if (text)
2107                     write_clip(hwnd, text);
2108                 else
2109                     MessageBeep(MB_ICONWARNING);
2110                 sfree(text);
2111             }
2112             break;
2113           case IDM_SOLVE:
2114             {
2115                 char *msg = midend_solve(fe->me);
2116                 if (msg)
2117                     MessageBox(hwnd, msg, "Unable to solve",
2118                                MB_ICONERROR | MB_OK);
2119             }
2120             break;
2121           case IDM_QUIT:
2122             if (!midend_process_key(fe->me, 0, 0, 'q'))
2123                 PostQuitMessage(0);
2124             break;
2125           case IDM_CONFIG:
2126             if (get_config(fe, CFG_SETTINGS))
2127                 new_game_type(fe);
2128             break;
2129           case IDM_SEED:
2130             if (get_config(fe, CFG_SEED))
2131                 new_game_type(fe);
2132             break;
2133           case IDM_DESC:
2134             if (get_config(fe, CFG_DESC))
2135                 new_game_type(fe);
2136             break;
2137           case IDM_PRINT:
2138             if (get_config(fe, CFG_PRINT))
2139                 print(fe);
2140             break;
2141           case IDM_ABOUT:
2142             about(fe);
2143             break;
2144           case IDM_LOAD:
2145           case IDM_SAVE:
2146             {
2147                 OPENFILENAME of;
2148                 char filename[FILENAME_MAX];
2149                 int ret;
2150
2151                 memset(&of, 0, sizeof(of));
2152                 of.hwndOwner = hwnd;
2153                 of.lpstrFilter = "All Files (*.*)\0*\0\0\0";
2154                 of.lpstrCustomFilter = NULL;
2155                 of.nFilterIndex = 1;
2156                 of.lpstrFile = filename;
2157                 filename[0] = '\0';
2158                 of.nMaxFile = lenof(filename);
2159                 of.lpstrFileTitle = NULL;
2160                 of.lpstrTitle = (cmd == IDM_SAVE ?
2161                                  "Enter name of game file to save" :
2162                                  "Enter name of saved game file to load");
2163                 of.Flags = 0;
2164 #ifdef OPENFILENAME_SIZE_VERSION_400
2165                 of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
2166 #else
2167                 of.lStructSize = sizeof(of);
2168 #endif
2169                 of.lpstrInitialDir = NULL;
2170
2171                 if (cmd == IDM_SAVE)
2172                     ret = GetSaveFileName(&of);
2173                 else
2174                     ret = GetOpenFileName(&of);
2175
2176                 if (ret) {
2177                     if (cmd == IDM_SAVE) {
2178                         FILE *fp;
2179
2180                         if ((fp = fopen(filename, "r")) != NULL) {
2181                             char buf[256 + FILENAME_MAX];
2182                             fclose(fp);
2183                             /* file exists */
2184
2185                             sprintf(buf, "Are you sure you want to overwrite"
2186                                     " the file \"%.*s\"?",
2187                                     FILENAME_MAX, filename);
2188                             if (MessageBox(hwnd, buf, "Question",
2189                                            MB_YESNO | MB_ICONQUESTION)
2190                                 != IDYES)
2191                                 break;
2192                         }
2193
2194                         fp = fopen(filename, "w");
2195
2196                         if (!fp) {
2197                             MessageBox(hwnd, "Unable to open save file",
2198                                        "Error", MB_ICONERROR | MB_OK);
2199                             break;
2200                         }
2201
2202                         midend_serialise(fe->me, savefile_write, fp);
2203
2204                         fclose(fp);
2205                     } else {
2206                         FILE *fp = fopen(filename, "r");
2207                         char *err;
2208
2209                         if (!fp) {
2210                             MessageBox(hwnd, "Unable to open saved game file",
2211                                        "Error", MB_ICONERROR | MB_OK);
2212                             break;
2213                         }
2214
2215                         err = midend_deserialise(fe->me, savefile_read, fp);
2216
2217                         fclose(fp);
2218
2219                         if (err) {
2220                             MessageBox(hwnd, err, "Error", MB_ICONERROR|MB_OK);
2221                             break;
2222                         }
2223
2224                         new_game_size(fe);
2225                     }
2226                 }
2227             }
2228
2229             break;
2230           case IDM_HELPC:
2231             start_help(fe, NULL);
2232             break;
2233           case IDM_GAMEHELP:
2234             start_help(fe, help_topic);
2235             break;
2236           default:
2237             {
2238                 int p = ((wParam &~ 0xF) - IDM_PRESETS) / 0x10;
2239
2240                 if (p >= 0 && p < fe->npresets) {
2241                     midend_set_params(fe->me, fe->presets[p]);
2242                     new_game_type(fe);
2243                 }
2244             }
2245             break;
2246         }
2247         break;
2248       case WM_DESTROY:
2249         stop_help(fe);
2250         PostQuitMessage(0);
2251         return 0;
2252       case WM_PAINT:
2253         {
2254             PAINTSTRUCT p;
2255             HDC hdc, hdc2;
2256             HBITMAP prevbm;
2257
2258             hdc = BeginPaint(hwnd, &p);
2259             hdc2 = CreateCompatibleDC(hdc);
2260             prevbm = SelectObject(hdc2, fe->bitmap);
2261             BitBlt(hdc,
2262                    p.rcPaint.left, p.rcPaint.top,
2263                    p.rcPaint.right - p.rcPaint.left,
2264                    p.rcPaint.bottom - p.rcPaint.top,
2265                    hdc2,
2266                    p.rcPaint.left, p.rcPaint.top,
2267                    SRCCOPY);
2268             SelectObject(hdc2, prevbm);
2269             DeleteDC(hdc2);
2270             EndPaint(hwnd, &p);
2271         }
2272         return 0;
2273       case WM_KEYDOWN:
2274         {
2275             int key = -1;
2276             BYTE keystate[256];
2277             int r = GetKeyboardState(keystate);
2278             int shift = (r && (keystate[VK_SHIFT] & 0x80)) ? MOD_SHFT : 0;
2279             int ctrl = (r && (keystate[VK_CONTROL] & 0x80)) ? MOD_CTRL : 0;
2280
2281             switch (wParam) {
2282               case VK_LEFT:
2283                 if (!(lParam & 0x01000000))
2284                     key = MOD_NUM_KEYPAD | '4';
2285                 else
2286                     key = shift | ctrl | CURSOR_LEFT;
2287                 break;
2288               case VK_RIGHT:
2289                 if (!(lParam & 0x01000000))
2290                     key = MOD_NUM_KEYPAD | '6';
2291                 else
2292                     key = shift | ctrl | CURSOR_RIGHT;
2293                 break;
2294               case VK_UP:
2295                 if (!(lParam & 0x01000000))
2296                     key = MOD_NUM_KEYPAD | '8';
2297                 else
2298                     key = shift | ctrl | CURSOR_UP;
2299                 break;
2300               case VK_DOWN:
2301                 if (!(lParam & 0x01000000))
2302                     key = MOD_NUM_KEYPAD | '2';
2303                 else
2304                     key = shift | ctrl | CURSOR_DOWN;
2305                 break;
2306                 /*
2307                  * Diagonal keys on the numeric keypad.
2308                  */
2309               case VK_PRIOR:
2310                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '9';
2311                 break;
2312               case VK_NEXT:
2313                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '3';
2314                 break;
2315               case VK_HOME:
2316                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '7';
2317                 break;
2318               case VK_END:
2319                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '1';
2320                 break;
2321               case VK_INSERT:
2322                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '0';
2323                 break;
2324               case VK_CLEAR:
2325                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '5';
2326                 break;
2327                 /*
2328                  * Numeric keypad keys with Num Lock on.
2329                  */
2330               case VK_NUMPAD4: key = MOD_NUM_KEYPAD | '4'; break;
2331               case VK_NUMPAD6: key = MOD_NUM_KEYPAD | '6'; break;
2332               case VK_NUMPAD8: key = MOD_NUM_KEYPAD | '8'; break;
2333               case VK_NUMPAD2: key = MOD_NUM_KEYPAD | '2'; break;
2334               case VK_NUMPAD5: key = MOD_NUM_KEYPAD | '5'; break;
2335               case VK_NUMPAD9: key = MOD_NUM_KEYPAD | '9'; break;
2336               case VK_NUMPAD3: key = MOD_NUM_KEYPAD | '3'; break;
2337               case VK_NUMPAD7: key = MOD_NUM_KEYPAD | '7'; break;
2338               case VK_NUMPAD1: key = MOD_NUM_KEYPAD | '1'; break;
2339               case VK_NUMPAD0: key = MOD_NUM_KEYPAD | '0'; break;
2340             }
2341
2342             if (key != -1) {
2343                 if (!midend_process_key(fe->me, 0, 0, key))
2344                     PostQuitMessage(0);
2345             } else {
2346                 MSG m;
2347                 m.hwnd = hwnd;
2348                 m.message = WM_KEYDOWN;
2349                 m.wParam = wParam;
2350                 m.lParam = lParam & 0xdfff;
2351                 TranslateMessage(&m);
2352             }
2353         }
2354         break;
2355       case WM_LBUTTONDOWN:
2356       case WM_RBUTTONDOWN:
2357       case WM_MBUTTONDOWN:
2358         {
2359             int button;
2360
2361             /*
2362              * Shift-clicks count as middle-clicks, since otherwise
2363              * two-button Windows users won't have any kind of
2364              * middle click to use.
2365              */
2366             if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
2367                 button = MIDDLE_BUTTON;
2368             else if (message == WM_RBUTTONDOWN || is_alt_pressed())
2369                 button = RIGHT_BUTTON;
2370             else
2371                 button = LEFT_BUTTON;
2372
2373             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
2374                                     (signed short)HIWORD(lParam), button))
2375                 PostQuitMessage(0);
2376
2377             SetCapture(hwnd);
2378         }
2379         break;
2380       case WM_LBUTTONUP:
2381       case WM_RBUTTONUP:
2382       case WM_MBUTTONUP:
2383         {
2384             int button;
2385
2386             /*
2387              * Shift-clicks count as middle-clicks, since otherwise
2388              * two-button Windows users won't have any kind of
2389              * middle click to use.
2390              */
2391             if (message == WM_MBUTTONUP || (wParam & MK_SHIFT))
2392                 button = MIDDLE_RELEASE;
2393             else if (message == WM_RBUTTONUP || is_alt_pressed())
2394                 button = RIGHT_RELEASE;
2395             else
2396                 button = LEFT_RELEASE;
2397
2398             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
2399                                     (signed short)HIWORD(lParam), button))
2400                 PostQuitMessage(0);
2401
2402             ReleaseCapture();
2403         }
2404         break;
2405       case WM_MOUSEMOVE:
2406         {
2407             int button;
2408
2409             if (wParam & (MK_MBUTTON | MK_SHIFT))
2410                 button = MIDDLE_DRAG;
2411             else if (wParam & MK_RBUTTON || is_alt_pressed())
2412                 button = RIGHT_DRAG;
2413             else
2414                 button = LEFT_DRAG;
2415
2416             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
2417                                     (signed short)HIWORD(lParam), button))
2418                 PostQuitMessage(0);
2419         }
2420         break;
2421       case WM_CHAR:
2422         if (!midend_process_key(fe->me, 0, 0, (unsigned char)wParam))
2423             PostQuitMessage(0);
2424         return 0;
2425       case WM_TIMER:
2426         if (fe->timer) {
2427             DWORD now = GetTickCount();
2428             float elapsed = (float) (now - fe->timer_last_tickcount) * 0.001F;
2429             midend_timer(fe->me, elapsed);
2430             fe->timer_last_tickcount = now;
2431         }
2432         return 0;
2433     }
2434
2435     return DefWindowProc(hwnd, message, wParam, lParam);
2436 }
2437
2438 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
2439 {
2440     MSG msg;
2441     char *error;
2442
2443     InitCommonControls();
2444
2445     if (!prev) {
2446         WNDCLASS wndclass;
2447
2448         wndclass.style = 0;
2449         wndclass.lpfnWndProc = WndProc;
2450         wndclass.cbClsExtra = 0;
2451         wndclass.cbWndExtra = 0;
2452         wndclass.hInstance = inst;
2453         wndclass.hIcon = LoadIcon(inst, MAKEINTRESOURCE(200));
2454         if (!wndclass.hIcon)           /* in case resource file is absent */
2455             wndclass.hIcon = LoadIcon(inst, IDI_APPLICATION);
2456         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
2457         wndclass.hbrBackground = NULL;
2458         wndclass.lpszMenuName = NULL;
2459         wndclass.lpszClassName = thegame.name;
2460
2461         RegisterClass(&wndclass);
2462     }
2463
2464     while (*cmdline && isspace((unsigned char)*cmdline))
2465         cmdline++;
2466
2467     init_help();
2468
2469     if (!new_window(inst, *cmdline ? cmdline : NULL, &error)) {
2470         char buf[128];
2471         sprintf(buf, "%.100s Error", thegame.name);
2472         MessageBox(NULL, error, buf, MB_OK|MB_ICONERROR);
2473         return 1;
2474     }
2475
2476     while (GetMessage(&msg, NULL, 0, 0)) {
2477         DispatchMessage(&msg);
2478     }
2479
2480     cleanup_help();
2481
2482     return msg.wParam;
2483 }