console/CON_console.c

   1 /*  CON_console.c
   2  *  Written By: Garrett Banuk <mongoose@mongeese.org>
   3  *  Code Cleanup and heavily extended by: Clemens Wacha <reflex-2000@gmx.net>
   4  *  Ported to use native Descent interfaces by: Bradley Bell <btb@icculus.org>
   5  *
   6  *  This is free, just be sure to give us credit when using it
   7  *  in any of your programs.
   8  */
   9
  10 #ifdef HAVE_CONFIG_H
  11 #include <conf.h>
  12 #endif
  13
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17 #include <stdarg.h>
  18
  19 #include "CON_console.h"
  20
  21 #include "u_mem.h"
  22 #include "gr.h"
  23 #include "timer.h"
  24
  25
  26 #define FG_COLOR    grd_curcanv->cv_font_fg_color
  27 #define get_msecs() approx_fsec_to_msec(timer_get_approx_seconds())
  28
  29
  30 /* This contains a pointer to the "topmost" console. The console that
  31  * is currently taking keyboard input. */
  32 static ConsoleInformation *Topmost;
  33
  34 /*  Takes keys from the keyboard and inputs them to the console
  35     If the event was not handled (i.e. WM events or unknown ctrl-shift
  36     sequences) the function returns the event for further processing. */
  37 int CON_Events(int event)
  38 {
  39         if(Topmost == NULL)
  40                 return event;
  41         if(!CON_isVisible(Topmost))
  42                 return event;
  43
  44         if(event & KEY_CTRLED)
  45         {
  46                 //CTRL pressed
  47                 switch(event & ~KEY_CTRLED)
  48                 {
  49                 case KEY_A:
  50                         Cursor_Home(Topmost);
  51                         break;
  52                 case KEY_E:
  53                         Cursor_End(Topmost);
  54                         break;
  55                 case KEY_C:
  56                         Clear_Command(Topmost);
  57                         break;
  58                 case KEY_L:
  59                         Clear_History(Topmost);
  60                         CON_UpdateConsole(Topmost);
  61                         break;
  62                 default:
  63                         return event;
  64                 }
  65         }
  66         else if(event & KEY_ALTED)
  67         {
  68                 //the console does not handle ALT combinations!
  69                 return event;
  70         }
  71         else
  72         {
  73                 //first of all, check if the console hide key was pressed
  74                 if(event == Topmost->HideKey)
  75                 {
  76                         CON_Hide(Topmost);
  77                         return 0;
  78                 }
  79                 switch (event & 0xff)
  80                 {
  81                 case KEY_LSHIFT:
  82                 case KEY_RSHIFT:
  83                         return event;
  84                 case KEY_HOME:
  85                         if(event & KEY_SHIFTED)
  86                         {
  87                                 Topmost->ConsoleScrollBack = Topmost->LineBuffer-1;
  88                                 CON_UpdateConsole(Topmost);
  89                         } else {
  90                                 Cursor_Home(Topmost);
  91                         }
  92                         break;
  93                 case KEY_END:
  94                         if(event & KEY_SHIFTED)
  95                         {
  96                                 Topmost->ConsoleScrollBack = 0;
  97                                 CON_UpdateConsole(Topmost);
  98                         } else {
  99                                 Cursor_End(Topmost);
 100                         }
 101                         break;
 102                 case KEY_PAGEUP:
 103                         Topmost->ConsoleScrollBack += CON_LINE_SCROLL;
 104                         if(Topmost->ConsoleScrollBack > Topmost->LineBuffer-1)
 105                                 Topmost->ConsoleScrollBack = Topmost->LineBuffer-1;
 106
 107                         CON_UpdateConsole(Topmost);
 108                         break;
 109                 case KEY_PAGEDOWN:
 110                         Topmost->ConsoleScrollBack -= CON_LINE_SCROLL;
 111                         if(Topmost->ConsoleScrollBack < 0)
 112                                 Topmost->ConsoleScrollBack = 0;
 113                         CON_UpdateConsole(Topmost);
 114                         break;
 115                 case KEY_UP:
 116                         Command_Up(Topmost);
 117                         break;
 118                 case KEY_DOWN:
 119                         Command_Down(Topmost);
 120                         break;
 121                 case KEY_LEFT:
 122                         Cursor_Left(Topmost);
 123                         break;
 124                 case KEY_RIGHT:
 125                         Cursor_Right(Topmost);
 126                         break;
 127                 case KEY_BACKSP:
 128                         Cursor_BSpace(Topmost);
 129                         break;
 130                 case KEY_DELETE:
 131                         Cursor_Del(Topmost);
 132                         break;
 133                 case KEY_INSERT:
 134                         Topmost->InsMode = 1-Topmost->InsMode;
 135                         break;
 136                 case KEY_TAB:
 137                         CON_TabCompletion(Topmost);
 138                         break;
 139                 case KEY_ENTER:
 140                         if(strlen(Topmost->Command) > 0) {
 141                                 CON_NewLineCommand(Topmost);
 142
 143                                 // copy the input into the past commands strings
 144                                 strcpy(Topmost->CommandLines[0], Topmost->Command);
 145
 146                                 // display the command including the prompt
 147                                 CON_Out(Topmost, "%s%s", Topmost->Prompt, Topmost->Command);
 148                                 CON_UpdateConsole(Topmost);
 149
 150                                 CON_Execute(Topmost, Topmost->Command);
 151                                 //printf("Command: %s\n", Topmost->Command);
 152
 153                                 Clear_Command(Topmost);
 154                                 Topmost->CommandScrollBack = -1;
 155                         }
 156                         break;
 157                 case KEY_ESC:
 158                         //deactivate Console
 159                         CON_Hide(Topmost);
 160                         return 0;
 161                 default:
 162                         if(Topmost->InsMode)
 163                                 Cursor_Add(Topmost, event);
 164                         else {
 165                                 Cursor_Add(Topmost, event);
 166                                 Cursor_Del(Topmost);
 167                         }
 168                 }
 169         }
 170         return 0;
 171 }
 172
 173 #if 0
 174 /* CON_AlphaGL() -- sets the alpha channel of an SDL_Surface to the
 175  * specified value.  Preconditions: the surface in question is RGBA.
 176  * 0 <= a <= 255, where 0 is transparent and 255 is opaque. */
 177 void CON_AlphaGL(SDL_Surface *s, int alpha) {
 178         Uint8 val;
 179         int x, y, w, h;
 180         Uint32 pixel;
 181         Uint8 r, g, b, a;
 182         SDL_PixelFormat *format;
 183         static char errorPrinted = 0;
 184
 185
 186         /* debugging assertions -- these slow you down, but hey, crashing sucks */
 187         if(!s) {
 188                 PRINT_ERROR("NULL Surface passed to CON_AlphaGL\n");
 189                 return;
 190         }
 191
 192         /* clamp alpha value to 0...255 */
 193         if(alpha < SDL_ALPHA_TRANSPARENT)
 194                 val = SDL_ALPHA_TRANSPARENT;
 195         else if(alpha > SDL_ALPHA_OPAQUE)
 196                 val = SDL_ALPHA_OPAQUE;
 197         else
 198                 val = alpha;
 199
 200         /* loop over alpha channels of each pixel, setting them appropriately. */
 201         w = s->w;
 202         h = s->h;
 203         format = s->format;
 204         switch (format->BytesPerPixel) {
 205         case 2:
 206                 /* 16-bit surfaces don't seem to support alpha channels. */
 207                 if(!errorPrinted) {
 208                         errorPrinted = 1;
 209                         PRINT_ERROR("16-bit SDL surfaces do not support alpha-blending under OpenGL.\n");
 210                 }
 211                 break;
 212         case 4: {
 213                         /* we can do this very quickly in 32-bit mode.  24-bit is more
 214                          * difficult.  And since 24-bit mode is reall the same as 32-bit,
 215                          * so it usually ends up taking this route too.  Win!  Unroll loop
 216                          * and use pointer arithmetic for extra speed. */
 217                         int numpixels = h * (w << 2);
 218                         Uint8 *pix = (Uint8 *) (s->pixels);
 219                         Uint8 *last = pix + numpixels;
 220                         Uint8 *pixel;
 221                         if((numpixels & 0x7) == 0)
 222                                 for(pixel = pix + 3; pixel < last; pixel += 32)
 223                                         *pixel = *(pixel + 4) = *(pixel + 8) = *(pixel + 12) = *(pixel + 16) = *(pixel + 20) = *(pixel + 24) = *(pixel + 28) = val;
 224                         else
 225                                 for(pixel = pix + 3; pixel < last; pixel += 4)
 226                                         *pixel = val;
 227                         break;
 228                 }
 229         default:
 230                 /* we have no choice but to do this slowly.  <sigh> */
 231                 for(y = 0; y < h; ++y)
 232                         for(x = 0; x < w; ++x) {
 233                                 char print = 0;
 234                                 /* Lock the surface for direct access to the pixels */
 235                                 if(SDL_MUSTLOCK(s) && SDL_LockSurface(s) < 0) {
 236                                         PRINT_ERROR("Can't lock surface: ");
 237                                         fprintf(stderr, "%s\n", SDL_GetError());
 238                                         return;
 239                                 }
 240                                 pixel = DT_GetPixel(s, x, y);
 241                                 if(x == 0 && y == 0)
 242                                         print = 1;
 243                                 SDL_GetRGBA(pixel, format, &r, &g, &b, &a);
 244                                 pixel = SDL_MapRGBA(format, r, g, b, val);
 245                                 SDL_GetRGBA(pixel, format, &r, &g, &b, &a);
 246                                 DT_PutPixel(s, x, y, pixel);
 247
 248                                 /* unlock surface again */
 249                                 if(SDL_MUSTLOCK(s))
 250                                         SDL_UnlockSurface(s);
 251                         }
 252                 break;
 253         }
 254 }
 255 #endif
 256
 257
 258 /* Updates the console buffer */
 259 void CON_UpdateConsole(ConsoleInformation *console) {
 260         int loop;
 261         int loop2;
 262         int Screenlines;
 263         grs_canvas *canv_save;
 264         short orig_color;
 265
 266         if(!console)
 267                 return;
 268
 269         /* Due to the Blits, the update is not very fast: So only update if it's worth it */
 270         if(!CON_isVisible(console))
 271                 return;
 272
 273         Screenlines = console->ConsoleSurface->cv_h / (CON_LINE_SPACE + console->ConsoleSurface->cv_font->ft_h);
 274
 275         canv_save = grd_curcanv;
 276         gr_set_current_canvas(console->ConsoleSurface);
 277
 278 #if 0
 279         SDL_FillRect(console->ConsoleSurface, NULL, SDL_MapRGBA(console->ConsoleSurface->format, 0, 0, 0, console->ConsoleAlpha));
 280 #else
 281         //gr_rect(0,0,
 282 #endif
 283
 284 #if 0
 285         if(console->OutputScreen->flags & SDL_OPENGLBLIT)
 286                 SDL_SetAlpha(console->ConsoleSurface, 0, SDL_ALPHA_OPAQUE);
 287 #endif
 288
 289         /* draw the background image if there is one */
 290         if(console->BackgroundImage)
 291                 gr_bitmap(0, 0, console->BackgroundImage);
 292
 293         /* Draw the text from the back buffers, calculate in the scrollback from the user
 294          * this is a normal SDL software-mode blit, so we need to temporarily set the ColorKey
 295          * for the font, and then clear it when we're done.
 296          */
 297 #if 0
 298         if((console->OutputScreen->flags & SDL_OPENGLBLIT) && (console->OutputScreen->format->BytesPerPixel > 2)) {
 299                 Uint32 *pix = (Uint32 *) (CurrentFont->FontSurface->pixels);
 300                 SDL_SetColorKey(CurrentFont->FontSurface, SDL_SRCCOLORKEY, *pix);
 301         }
 302 #endif
 303
 304         //now draw text from last but second line to top
 305         for(loop = 0; loop < Screenlines-1 && loop < console->LineBuffer - console->ConsoleScrollBack; loop++) {
 306                 if(console->ConsoleScrollBack != 0 && loop == 0)
 307                         for(loop2 = 0; loop2 < (console->VChars / 5) + 1; loop2++)
 308                         {
 309                                 orig_color = FG_COLOR;
 310                                 gr_string(CON_CHAR_BORDER + (loop2*5*console->ConsoleSurface->cv_font->ft_w), (Screenlines - loop - 2) * (CON_LINE_SPACE + console->ConsoleSurface->cv_font->ft_h), CON_SCROLL_INDICATOR);
 311                                 FG_COLOR = orig_color;
 312                         }
 313                 else
 314                 {
 315                         orig_color = FG_COLOR;
 316                         gr_string(CON_CHAR_BORDER, (Screenlines - loop - 2) * (CON_LINE_SPACE + console->ConsoleSurface->cv_font->ft_h), console->ConsoleLines[console->ConsoleScrollBack + loop]);
 317                         FG_COLOR = orig_color;
 318                 }
 319         }
 320
 321         gr_set_current_canvas(canv_save);
 322
 323 #if 0
 324         if(console->OutputScreen->flags & SDL_OPENGLBLIT)
 325                 SDL_SetColorKey(CurrentFont->FontSurface, 0, 0);
 326 #endif
 327 }
 328
 329 void CON_UpdateOffset(ConsoleInformation* console) {
 330         if(!console)
 331                 return;
 332
 333         switch(console->Visible) {
 334         case CON_CLOSING:
 335                 console->RaiseOffset -= CON_OPENCLOSE_SPEED;
 336                 if(console->RaiseOffset <= 0) {
 337                         console->RaiseOffset = 0;
 338                         console->Visible = CON_CLOSED;
 339                 }
 340                 break;
 341         case CON_OPENING:
 342                 console->RaiseOffset += CON_OPENCLOSE_SPEED;
 343                 if(console->RaiseOffset >= console->ConsoleSurface->cv_h) {
 344                         console->RaiseOffset = console->ConsoleSurface->cv_h;
 345                         console->Visible = CON_OPEN;
 346                 }
 347                 break;
 348         case CON_OPEN:
 349         case CON_CLOSED:
 350                 break;
 351         }
 352 }
 353
 354 /* Draws the console buffer to the screen if the console is "visible" */
 355 void CON_DrawConsole(ConsoleInformation *console) {
 356         grs_canvas *canv_save;
 357         grs_bitmap *clip;
 358
 359         if(!console)
 360                 return;
 361
 362         /* only draw if console is visible: here this means, that the console is not CON_CLOSED */
 363         if(console->Visible == CON_CLOSED)
 364                 return;
 365
 366         /* Update the scrolling offset */
 367         CON_UpdateOffset(console);
 368
 369         /* Update the command line since it has a blinking cursor */
 370         DrawCommandLine();
 371
 372 #if 0
 373         /* before drawing, make sure the alpha channel of the console surface is set
 374          * properly.  (sigh) I wish we didn't have to do this every frame... */
 375         if(console->OutputScreen->flags & SDL_OPENGLBLIT)
 376                 CON_AlphaGL(console->ConsoleSurface, console->ConsoleAlpha);
 377 #endif
 378
 379         canv_save = grd_curcanv;
 380         gr_set_current_canvas(&console->OutputScreen->sc_canvas);
 381
 382         clip = gr_create_sub_bitmap(&console->ConsoleSurface->cv_bitmap, 0, console->ConsoleSurface->cv_h - console->RaiseOffset, console->ConsoleSurface->cv_w, console->RaiseOffset);
 383
 384         gr_bitmap(console->DispX, console->DispY, clip);
 385         gr_free_sub_bitmap(clip);
 386
 387 #if 0
 388         if(console->OutputScreen->flags & SDL_OPENGLBLIT)
 389                 SDL_UpdateRects(console->OutputScreen, 1, &DestRect);
 390 #endif
 391
 392         gr_set_current_canvas(canv_save);
 393 }
 394
 395
 396 /* Initializes the console */
 397 ConsoleInformation *CON_Init(grs_font *Font, grs_screen *DisplayScreen, int lines, int x, int y, int w, int h)
 398 {
 399         int loop;
 400         ConsoleInformation *newinfo;
 401
 402
 403         /* Create a new console struct and init it. */
 404         if((newinfo = (ConsoleInformation *) d_malloc(sizeof(ConsoleInformation))) == NULL) {
 405                 //PRINT_ERROR("Could not allocate the space for a new console info struct.\n");
 406                 return NULL;
 407         }
 408         newinfo->Visible = CON_CLOSED;
 409         newinfo->RaiseOffset = 0;
 410         newinfo->ConsoleLines = NULL;
 411         newinfo->CommandLines = NULL;
 412         newinfo->TotalConsoleLines = 0;
 413         newinfo->ConsoleScrollBack = 0;
 414         newinfo->TotalCommands = 0;
 415         newinfo->BackgroundImage = NULL;
 416 #if 0
 417         newinfo->ConsoleAlpha = SDL_ALPHA_OPAQUE;
 418 #endif
 419         newinfo->Offset = 0;
 420         newinfo->InsMode = 1;
 421         newinfo->CursorPos = 0;
 422         newinfo->CommandScrollBack = 0;
 423         newinfo->OutputScreen = DisplayScreen;
 424         newinfo->Prompt = CON_DEFAULT_PROMPT;
 425         newinfo->HideKey = CON_DEFAULT_HIDEKEY;
 426
 427         CON_SetExecuteFunction(newinfo, Default_CmdFunction);
 428         CON_SetTabCompletion(newinfo, Default_TabFunction);
 429
 430         /* make sure that the size of the console is valid */
 431         if(w > newinfo->OutputScreen->sc_w || w < Font->ft_w * 32)
 432                 w = newinfo->OutputScreen->sc_w;
 433         if(h > newinfo->OutputScreen->sc_h || h < Font->ft_h)
 434                 h = newinfo->OutputScreen->sc_h;
 435         if(x < 0 || x > newinfo->OutputScreen->sc_w - w)
 436                 newinfo->DispX = 0;
 437         else
 438                 newinfo->DispX = x;
 439         if(y < 0 || y > newinfo->OutputScreen->sc_h - h)
 440                 newinfo->DispY = 0;
 441         else
 442                 newinfo->DispY = y;
 443
 444         /* load the console surface */
 445         newinfo->ConsoleSurface = gr_create_canvas(w, h);
 446
 447         /* Load the consoles font */
 448         {
 449                 grs_canvas *canv_save;
 450
 451                 canv_save = grd_curcanv;
 452                 gr_set_current_canvas(newinfo->ConsoleSurface);
 453                 gr_set_curfont(Font);
 454                 gr_set_fontcolor(gr_getcolor(63,63,63), -1);
 455                 gr_set_current_canvas(canv_save);
 456         }
 457
 458
 459         /* Load the dirty rectangle for user input */
 460         newinfo->InputBackground = gr_create_bitmap(w, newinfo->ConsoleSurface->cv_font->ft_h);
 461 #if 0
 462         SDL_FillRect(newinfo->InputBackground, NULL, SDL_MapRGBA(newinfo->ConsoleSurface->format, 0, 0, 0, SDL_ALPHA_OPAQUE));
 463 #endif
 464
 465         /* calculate the number of visible characters in the command line */
 466         newinfo->VChars = (w - CON_CHAR_BORDER) / newinfo->ConsoleSurface->cv_font->ft_w;
 467         if(newinfo->VChars > CON_CHARS_PER_LINE)
 468                 newinfo->VChars = CON_CHARS_PER_LINE;
 469
 470         /* We would like to have a minumum # of lines to guarentee we don't create a memory error */
 471         if(h / (CON_LINE_SPACE + newinfo->ConsoleSurface->cv_font->ft_h) > lines)
 472                 newinfo->LineBuffer = h / (CON_LINE_SPACE + newinfo->ConsoleSurface->cv_font->ft_h);
 473         else
 474                 newinfo->LineBuffer = lines;
 475
 476
 477         newinfo->ConsoleLines = (char **)d_malloc(sizeof(char *) * newinfo->LineBuffer);
 478         newinfo->CommandLines = (char **)d_malloc(sizeof(char *) * newinfo->LineBuffer);
 479         for(loop = 0; loop <= newinfo->LineBuffer - 1; loop++) {
 480                 newinfo->ConsoleLines[loop] = (char *)d_calloc(CON_CHARS_PER_LINE, sizeof(char));
 481                 newinfo->CommandLines[loop] = (char *)d_calloc(CON_CHARS_PER_LINE, sizeof(char));
 482         }
 483         memset(newinfo->Command, 0, CON_CHARS_PER_LINE);
 484         memset(newinfo->LCommand, 0, CON_CHARS_PER_LINE);
 485         memset(newinfo->RCommand, 0, CON_CHARS_PER_LINE);
 486         memset(newinfo->VCommand, 0, CON_CHARS_PER_LINE);
 487
 488
 489         CON_Out(newinfo, "Console initialised.");
 490         CON_NewLineConsole(newinfo);
 491         //CON_ListCommands(newinfo);
 492
 493         return newinfo;
 494 }
 495
 496 /* Makes the console visible */
 497 void CON_Show(ConsoleInformation *console) {
 498         if(console) {
 499                 console->Visible = CON_OPENING;
 500                 CON_UpdateConsole(console);
 501         }
 502 }
 503
 504 /* Hides the console (make it invisible) */
 505 void CON_Hide(ConsoleInformation *console) {
 506         if(console)
 507                 console->Visible = CON_CLOSING;
 508 }
 509
 510 /* tells wether the console is visible or not */
 511 int CON_isVisible(ConsoleInformation *console) {
 512         if(!console)
 513                 return CON_CLOSED;
 514         return((console->Visible == CON_OPEN) || (console->Visible == CON_OPENING));
 515 }
 516
 517 /* Frees all the memory loaded by the console */
 518 void CON_Destroy(ConsoleInformation *console) {
 519         CON_Free(console);
 520 }
 521
 522 /* Frees all the memory loaded by the console */
 523 void CON_Free(ConsoleInformation *console) {
 524         int i;
 525
 526         if(!console)
 527                 return;
 528
 529         //CON_DestroyCommands();
 530         for(i = 0; i <= console->LineBuffer - 1; i++) {
 531                 d_free(console->ConsoleLines[i]);
 532                 d_free(console->CommandLines[i]);
 533         }
 534         d_free(console->ConsoleLines);
 535         d_free(console->CommandLines);
 536
 537         console->ConsoleLines = NULL;
 538         console->CommandLines = NULL;
 539
 540         gr_free_canvas(console->ConsoleSurface);
 541         console->ConsoleSurface = NULL;
 542
 543         if (console->BackgroundImage)
 544                 gr_free_bitmap(console->BackgroundImage);
 545         console->BackgroundImage = NULL;
 546
 547         gr_free_bitmap(console->InputBackground);
 548         console->InputBackground = NULL;
 549
 550         d_free(console);
 551 }
 552
 553
 554 /* Increments the console lines */
 555 void CON_NewLineConsole(ConsoleInformation *console) {
 556         int loop;
 557         char* temp;
 558
 559         if(!console)
 560                 return;
 561
 562         temp = console->ConsoleLines[console->LineBuffer - 1];
 563
 564         for(loop = console->LineBuffer - 1; loop > 0; loop--)
 565                 console->ConsoleLines[loop] = console->ConsoleLines[loop - 1];
 566
 567         console->ConsoleLines[0] = temp;
 568
 569         memset(console->ConsoleLines[0], 0, CON_CHARS_PER_LINE);
 570         if(console->TotalConsoleLines < console->LineBuffer - 1)
 571                 console->TotalConsoleLines++;
 572
 573         //Now adjust the ConsoleScrollBack
 574         //dont scroll if not at bottom
 575         if(console->ConsoleScrollBack != 0)
 576                 console->ConsoleScrollBack++;
 577         //boundaries
 578         if(console->ConsoleScrollBack > console->LineBuffer-1)
 579                 console->ConsoleScrollBack = console->LineBuffer-1;
 580
 581 }
 582
 583
 584 /* Increments the command lines */
 585 void CON_NewLineCommand(ConsoleInformation *console) {
 586         int loop;
 587         char *temp;
 588
 589         if(!console)
 590                 return;
 591
 592         temp  = console->CommandLines[console->LineBuffer - 1];
 593
 594
 595         for(loop = console->LineBuffer - 1; loop > 0; loop--)
 596                 console->CommandLines[loop] = console->CommandLines[loop - 1];
 597
 598         console->CommandLines[0] = temp;
 599
 600         memset(console->CommandLines[0], 0, CON_CHARS_PER_LINE);
 601         if(console->TotalCommands < console->LineBuffer - 1)
 602                 console->TotalCommands++;
 603 }
 604
 605 /* Draws the command line the user is typing in to the screen */
 606 /* completely rewritten by C.Wacha */
 607 void DrawCommandLine() {
 608         int x;
 609         int commandbuffer;
 610 #if 0
 611         grs_font* CurrentFont;
 612 #endif
 613         static unsigned int LastBlinkTime = 0;  /* Last time the consoles cursor blinked */
 614         static int LastCursorPos = 0;           // Last Cursor Position
 615         static int Blink = 0;                   /* Is the cursor currently blinking */
 616         grs_canvas *canv_save;
 617         short orig_color;
 618
 619         if(!Topmost)
 620                 return;
 621
 622         commandbuffer = Topmost->VChars - strlen(Topmost->Prompt)-1; // -1 to make cursor visible
 623
 624 #if 0
 625         CurrentFont = Topmost->ConsoleSurface->cv_font;
 626 #endif
 627
 628         //Concatenate the left and right side to command
 629         strcpy(Topmost->Command, Topmost->LCommand);
 630         strncat(Topmost->Command, Topmost->RCommand, strlen(Topmost->RCommand));
 631
 632         //calculate display offset from current cursor position
 633         if(Topmost->Offset < Topmost->CursorPos - commandbuffer)
 634                 Topmost->Offset = Topmost->CursorPos - commandbuffer;
 635         if(Topmost->Offset > Topmost->CursorPos)
 636                 Topmost->Offset = Topmost->CursorPos;
 637
 638         //first add prompt to visible part
 639         strcpy(Topmost->VCommand, Topmost->Prompt);
 640
 641         //then add the visible part of the command
 642         strncat(Topmost->VCommand, &Topmost->Command[Topmost->Offset], strlen(&Topmost->Command[Topmost->Offset]));
 643
 644         //now display the result
 645
 646 #if 0
 647         //once again we're drawing text, so in OpenGL context we need to temporarily set up
 648         //software-mode transparency.
 649         if(Topmost->OutputScreen->flags & SDL_OPENGLBLIT) {
 650                 Uint32 *pix = (Uint32 *) (CurrentFont->FontSurface->pixels);
 651                 SDL_SetColorKey(CurrentFont->FontSurface, SDL_SRCCOLORKEY, *pix);
 652         }
 653 #endif
 654
 655         canv_save = grd_curcanv;
 656         gr_set_current_canvas(Topmost->ConsoleSurface);
 657
 658         //first of all restore InputBackground
 659         gr_bitmap(0, Topmost->ConsoleSurface->cv_h - Topmost->ConsoleSurface->cv_font->ft_h, Topmost->InputBackground);
 660
 661         //now add the text
 662         orig_color = FG_COLOR;
 663         gr_string(CON_CHAR_BORDER, Topmost->ConsoleSurface->cv_h - Topmost->ConsoleSurface->cv_font->ft_h, Topmost->VCommand);
 664         FG_COLOR = orig_color;
 665
 666         //at last add the cursor
 667         //check if the blink period is over
 668         if(get_msecs() > LastBlinkTime) {
 669                 LastBlinkTime = get_msecs() + CON_BLINK_RATE;
 670                 if(Blink)
 671                         Blink = 0;
 672                 else
 673                         Blink = 1;
 674         }
 675
 676         //check if cursor has moved - if yes display cursor anyway
 677         if(Topmost->CursorPos != LastCursorPos) {
 678                 LastCursorPos = Topmost->CursorPos;
 679                 LastBlinkTime = get_msecs() + CON_BLINK_RATE;
 680                 Blink = 1;
 681         }
 682
 683         if(Blink) {
 684                 int prompt_width, cmd_width, h, w;
 685
 686                 gr_get_string_size(Topmost->Prompt, &prompt_width, &h, &w);
 687                 gr_get_string_size(Topmost->LCommand + Topmost->Offset, &cmd_width, &h, &w);
 688                 x = CON_CHAR_BORDER + prompt_width + cmd_width;
 689                 orig_color = FG_COLOR;
 690                 if(Topmost->InsMode)
 691                         gr_string(x, Topmost->ConsoleSurface->cv_h - Topmost->ConsoleSurface->cv_font->ft_h, CON_INS_CURSOR);
 692                 else
 693                         gr_string(x, Topmost->ConsoleSurface->cv_h - Topmost->ConsoleSurface->cv_font->ft_h, CON_OVR_CURSOR);
 694                 FG_COLOR = orig_color;
 695         }
 696
 697         gr_set_current_canvas(canv_save);
 698
 699
 700 #if 0
 701         if(Topmost->OutputScreen->flags & SDL_OPENGLBLIT) {
 702                 SDL_SetColorKey(CurrentFont->FontSurface, 0, 0);
 703         }
 704 #endif
 705 }
 706
 707 #ifdef _MSC_VER
 708 # define vsnprintf _vsnprintf
 709 #endif
 710
 711 /* Outputs text to the console (in game), up to CON_CHARS_PER_LINE chars can be entered */
 712 void CON_Out(ConsoleInformation *console, const char *str, ...) {
 713         va_list marker;
 714         //keep some space free for stuff like CON_Out(console, "blablabla %s", console->Command);
 715         char temp[CON_CHARS_PER_LINE + 128];
 716         char* ptemp;
 717
 718         if(!console)
 719                 return;
 720
 721         va_start(marker, str);
 722         vsnprintf(temp, CON_CHARS_PER_LINE + 127, str, marker);
 723         va_end(marker);
 724
 725         ptemp = temp;
 726
 727         //temp now contains the complete string we want to output
 728         // the only problem is that temp is maybe longer than the console
 729         // width so we have to cut it into several pieces
 730
 731         if(console->ConsoleLines) {
 732                 while(strlen(ptemp) > console->VChars) {
 733                         CON_NewLineConsole(console);
 734                         strncpy(console->ConsoleLines[0], ptemp, console->VChars);
 735                         console->ConsoleLines[0][console->VChars] = '\0';
 736                         ptemp = &ptemp[console->VChars];
 737                 }
 738                 CON_NewLineConsole(console);
 739                 strncpy(console->ConsoleLines[0], ptemp, console->VChars);
 740                 console->ConsoleLines[0][console->VChars] = '\0';
 741                 CON_UpdateConsole(console);
 742         }
 743
 744         /* And print to stdout */
 745         //printf("%s\n", temp);
 746 }
 747
 748
 749 #if 0
 750 /* Sets the alpha level of the console, 0 turns off alpha blending */
 751 void CON_Alpha(ConsoleInformation *console, unsigned char alpha) {
 752         if(!console)
 753                 return;
 754
 755         /* store alpha as state! */
 756         console->ConsoleAlpha = alpha;
 757
 758         if((console->OutputScreen->flags & SDL_OPENGLBLIT) == 0) {
 759                 if(alpha == 0)
 760                         SDL_SetAlpha(console->ConsoleSurface, 0, alpha);
 761                 else
 762                         SDL_SetAlpha(console->ConsoleSurface, SDL_SRCALPHA, alpha);
 763         }
 764
 765         //      CON_UpdateConsole(console);
 766 }
 767 #endif
 768
 769
 770 /* Adds  background image to the console, scaled to size of console*/
 771 int CON_Background(ConsoleInformation *console, grs_bitmap *image)
 772 {
 773         if(!console)
 774                 return 1;
 775
 776         /* Free the background from the console */
 777         if (image == NULL) {
 778                 if (console->BackgroundImage)
 779                         gr_free_bitmap(console->BackgroundImage);
 780                 console->BackgroundImage = NULL;
 781 #if 0
 782                 SDL_FillRect(console->InputBackground, NULL, SDL_MapRGBA(console->ConsoleSurface->format, 0, 0, 0, SDL_ALPHA_OPAQUE));
 783 #endif
 784                 return 0;
 785         }
 786
 787         /* Load a new background */
 788         if (console->BackgroundImage)
 789                 gr_free_bitmap(console->BackgroundImage);
 790         console->BackgroundImage = gr_create_bitmap(console->ConsoleSurface->cv_w, console->ConsoleSurface->cv_h);
 791         gr_bitmap_scale_to(image, console->BackgroundImage);
 792
 793 #if 0
 794         SDL_FillRect(console->InputBackground, NULL, SDL_MapRGBA(console->ConsoleSurface->format, 0, 0, 0, SDL_ALPHA_OPAQUE));
 795 #endif
 796         gr_bm_bitblt(console->BackgroundImage->bm_w, console->InputBackground->bm_h, 0, 0, 0, console->ConsoleSurface->cv_h - console->ConsoleSurface->cv_font->ft_h, console->BackgroundImage, console->InputBackground);
 797
 798         return 0;
 799 }
 800
 801 /* Sets font info for the console */
 802 void CON_Font(ConsoleInformation *console, grs_font *font, int fg, int bg)
 803 {
 804         grs_canvas *canv_save;
 805
 806         canv_save = grd_curcanv;
 807         gr_set_current_canvas(console->ConsoleSurface);
 808         gr_set_curfont(font);
 809         gr_set_fontcolor(fg, bg);
 810         gr_set_current_canvas(canv_save);
 811 }
 812
 813 /* takes a new x and y of the top left of the console window */
 814 void CON_Position(ConsoleInformation *console, int x, int y) {
 815         if(!console)
 816                 return;
 817
 818         if(x < 0 || x > console->OutputScreen->sc_w - console->ConsoleSurface->cv_w)
 819                 console->DispX = 0;
 820         else
 821                 console->DispX = x;
 822
 823         if(y < 0 || y > console->OutputScreen->sc_h - console->ConsoleSurface->cv_h)
 824                 console->DispY = 0;
 825         else
 826                 console->DispY = y;
 827 }
 828
 829 void gr_init_bitmap_alloc( grs_bitmap *bm, int mode, int x, int y, int w, int h, int bytesperline);
 830 /* resizes the console, has to reset alot of stuff
 831  * returns 1 on error */
 832 int CON_Resize(ConsoleInformation *console, int x, int y, int w, int h)
 833 {
 834         if(!console)
 835                 return 1;
 836
 837         /* make sure that the size of the console is valid */
 838         if(w > console->OutputScreen->sc_w || w < console->ConsoleSurface->cv_font->ft_w * 32)
 839                 w = console->OutputScreen->sc_w;
 840         if(h > console->OutputScreen->sc_h || h < console->ConsoleSurface->cv_font->ft_h)
 841                 h = console->OutputScreen->sc_h;
 842         if(x < 0 || x > console->OutputScreen->sc_w - w)
 843                 console->DispX = 0;
 844         else
 845                 console->DispX = x;
 846         if(y < 0 || y > console->OutputScreen->sc_h - h)
 847                 console->DispY = 0;
 848         else
 849                 console->DispY = y;
 850
 851         /* resize console surface */
 852         gr_free_bitmap_data(&console->ConsoleSurface->cv_bitmap);
 853         gr_init_bitmap_alloc(&console->ConsoleSurface->cv_bitmap, BM_LINEAR, 0, 0, w, h, w);
 854
 855         /* Load the dirty rectangle for user input */
 856         gr_free_bitmap(console->InputBackground);
 857         console->InputBackground = gr_create_bitmap(w, console->ConsoleSurface->cv_font->ft_h);
 858
 859         /* Now reset some stuff dependent on the previous size */
 860         console->ConsoleScrollBack = 0;
 861
 862         /* Reload the background image (for the input text area) in the console */
 863         if(console->BackgroundImage) {
 864 #if 0
 865                 SDL_FillRect(console->InputBackground, NULL, SDL_MapRGBA(console->ConsoleSurface->format, 0, 0, 0, SDL_ALPHA_OPAQUE));
 866 #endif
 867                 gr_bm_bitblt(console->BackgroundImage->bm_w, console->InputBackground->bm_h, 0, 0, 0, console->ConsoleSurface->cv_h - console->ConsoleSurface->cv_font->ft_h, console->BackgroundImage, console->InputBackground);
 868         }
 869
 870 #if 0
 871         /* restore the alpha level */
 872         CON_Alpha(console, console->ConsoleAlpha);
 873 #endif
 874         return 0;
 875 }
 876
 877 /* Transfers the console to another screen surface, and adjusts size */
 878 int CON_Transfer(ConsoleInformation *console, grs_screen *new_outputscreen, int x, int y, int w, int h)
 879 {
 880         if(!console)
 881                 return 1;
 882
 883         console->OutputScreen = new_outputscreen;
 884
 885         return(CON_Resize(console, x, y, w, h));
 886 }
 887
 888 /* Sets the topmost console for input */
 889 void CON_Topmost(ConsoleInformation *console) {
 890         grs_canvas *canv_save;
 891         short orig_color;
 892
 893         if(!console)
 894                 return;
 895
 896         // Make sure the blinking cursor is gone
 897         if(Topmost) {
 898                 canv_save = grd_curcanv;
 899                 gr_set_current_canvas(Topmost->ConsoleSurface);
 900
 901                 gr_bitmap(0, Topmost->ConsoleSurface->cv_h - Topmost->ConsoleSurface->cv_font->ft_h, Topmost->InputBackground);
 902                 orig_color = FG_COLOR;
 903                 gr_string(CON_CHAR_BORDER, Topmost->ConsoleSurface->cv_h - Topmost->ConsoleSurface->cv_font->ft_h, Topmost->VCommand);
 904                 FG_COLOR = orig_color;
 905
 906                 gr_set_current_canvas(canv_save);
 907         }
 908         Topmost = console;
 909 }
 910
 911 /* Sets the Prompt for console */
 912 void CON_SetPrompt(ConsoleInformation *console, char* newprompt) {
 913         if(!console)
 914                 return;
 915
 916         //check length so we can still see at least 1 char :-)
 917         if(strlen(newprompt) < console->VChars)
 918                 console->Prompt = d_strdup(newprompt);
 919         else
 920                 CON_Out(console, "prompt too long. (max. %i chars)", console->VChars - 1);
 921 }
 922
 923 /* Sets the key that deactivates (hides) the console. */
 924 void CON_SetHideKey(ConsoleInformation *console, int key) {
 925         if(console)
 926                 console->HideKey = key;
 927 }
 928
 929 /* Executes the command entered */
 930 void CON_Execute(ConsoleInformation *console, char* command) {
 931         if(console)
 932                 console->CmdFunction(console, command);
 933 }
 934
 935 void CON_SetExecuteFunction(ConsoleInformation *console, void(*CmdFunction)(ConsoleInformation *console2, char* command)) {
 936         if(console)
 937                 console->CmdFunction = CmdFunction;
 938 }
 939
 940 void Default_CmdFunction(ConsoleInformation *console, char* command) {
 941         CON_Out(console, "     No CommandFunction registered");
 942         CON_Out(console, "     use 'CON_SetExecuteFunction' to register one");
 943         CON_Out(console, " ");
 944         CON_Out(console, "Unknown Command \"%s\"", command);
 945 }
 946
 947 void CON_SetTabCompletion(ConsoleInformation *console, char*(*TabFunction)(char* command)) {
 948         if(console)
 949                 console->TabFunction = TabFunction;
 950 }
 951
 952 void CON_TabCompletion(ConsoleInformation *console) {
 953         int i,j;
 954         char* command;
 955
 956         if(!console)
 957                 return;
 958
 959         command = d_strdup(console->LCommand);
 960         command = console->TabFunction(command);
 961
 962         if(!command)
 963                 return; //no tab completion took place so return silently
 964
 965         j = strlen(command);
 966         if(j > CON_CHARS_PER_LINE - 2)
 967                 j = CON_CHARS_PER_LINE-1;
 968
 969         memset(console->LCommand, 0, CON_CHARS_PER_LINE);
 970         console->CursorPos = 0;
 971
 972         for(i = 0; i < j; i++) {
 973                 console->CursorPos++;
 974                 console->LCommand[i] = command[i];
 975         }
 976         //add a trailing space
 977         console->CursorPos++;
 978         console->LCommand[j] = ' ';
 979         console->LCommand[j+1] = '\0';
 980 }
 981
 982 char* Default_TabFunction(char* command) {
 983         CON_Out(Topmost, "     No TabFunction registered");
 984         CON_Out(Topmost, "     use 'CON_SetTabCompletion' to register one");
 985         CON_Out(Topmost, " ");
 986         return NULL;
 987 }
 988
 989 void Cursor_Left(ConsoleInformation *console) {
 990         char temp[CON_CHARS_PER_LINE];
 991
 992         if(Topmost->CursorPos > 0) {
 993                 Topmost->CursorPos--;
 994                 strcpy(temp, Topmost->RCommand);
 995                 strcpy(Topmost->RCommand, &Topmost->LCommand[strlen(Topmost->LCommand)-1]);
 996                 strcat(Topmost->RCommand, temp);
 997                 Topmost->LCommand[strlen(Topmost->LCommand)-1] = '\0';
 998                 //CON_Out(Topmost, "L:%s, R:%s", Topmost->LCommand, Topmost->RCommand);
 999         }
1000 }
1001
1002 void Cursor_Right(ConsoleInformation *console) {
1003         char temp[CON_CHARS_PER_LINE];
1004
1005         if(Topmost->CursorPos < strlen(Topmost->Command)) {
1006                 Topmost->CursorPos++;
1007                 strncat(Topmost->LCommand, Topmost->RCommand, 1);
1008                 strcpy(temp, Topmost->RCommand);
1009                 strcpy(Topmost->RCommand, &temp[1]);
1010                 //CON_Out(Topmost, "L:%s, R:%s", Topmost->LCommand, Topmost->RCommand);
1011         }
1012 }
1013
1014 void Cursor_Home(ConsoleInformation *console) {
1015         char temp[CON_CHARS_PER_LINE];
1016
1017         Topmost->CursorPos = 0;
1018         strcpy(temp, Topmost->RCommand);
1019         strcpy(Topmost->RCommand, Topmost->LCommand);
1020         strncat(Topmost->RCommand, temp, strlen(temp));
1021         memset(Topmost->LCommand, 0, CON_CHARS_PER_LINE);
1022 }
1023
1024 void Cursor_End(ConsoleInformation *console) {
1025         Topmost->CursorPos = strlen(Topmost->Command);
1026         strncat(Topmost->LCommand, Topmost->RCommand, strlen(Topmost->RCommand));
1027         memset(Topmost->RCommand, 0, CON_CHARS_PER_LINE);
1028 }
1029
1030 void Cursor_Del(ConsoleInformation *console) {
1031         char temp[CON_CHARS_PER_LINE];
1032
1033         if(strlen(Topmost->RCommand) > 0) {
1034                 strcpy(temp, Topmost->RCommand);
1035                 strcpy(Topmost->RCommand, &temp[1]);
1036         }
1037 }
1038
1039 void Cursor_BSpace(ConsoleInformation *console) {
1040         if(Topmost->CursorPos > 0) {
1041                 Topmost->CursorPos--;
1042                 Topmost->Offset--;
1043                 if(Topmost->Offset < 0)
1044                         Topmost->Offset = 0;
1045                 Topmost->LCommand[strlen(Topmost->LCommand)-1] = '\0';
1046         }
1047 }
1048
1049 void Cursor_Add(ConsoleInformation *console, int event)
1050 {
1051         if(strlen(Topmost->Command) < CON_CHARS_PER_LINE - 1)
1052         {
1053                 Topmost->CursorPos++;
1054                 Topmost->LCommand[strlen(Topmost->LCommand)] = key_to_ascii(event);
1055                 Topmost->LCommand[strlen(Topmost->LCommand)] = '\0';
1056         }
1057 }
1058
1059 void Clear_Command(ConsoleInformation *console) {
1060         Topmost->CursorPos = 0;
1061         memset(Topmost->VCommand, 0, CON_CHARS_PER_LINE);
1062         memset(Topmost->Command, 0, CON_CHARS_PER_LINE);
1063         memset(Topmost->LCommand, 0, CON_CHARS_PER_LINE);
1064         memset(Topmost->RCommand, 0, CON_CHARS_PER_LINE);
1065 }
1066
1067 void Clear_History(ConsoleInformation *console) {
1068         int loop;
1069
1070         for(loop = 0; loop <= console->LineBuffer - 1; loop++)
1071                 memset(console->ConsoleLines[loop], 0, CON_CHARS_PER_LINE);
1072 }
1073
1074 void Command_Up(ConsoleInformation *console) {
1075         if(console->CommandScrollBack < console->TotalCommands - 1) {
1076                 /* move back a line in the command strings and copy the command to the current input string */
1077                 console->CommandScrollBack++;
1078                 memset(console->RCommand, 0, CON_CHARS_PER_LINE);
1079                 console->Offset = 0;
1080                 strcpy(console->LCommand, console->CommandLines[console->CommandScrollBack]);
1081                 console->CursorPos = strlen(console->CommandLines[console->CommandScrollBack]);
1082                 CON_UpdateConsole(console);
1083         }
1084 }
1085
1086 void Command_Down(ConsoleInformation *console) {
1087         if(console->CommandScrollBack > -1) {
1088                 /* move forward a line in the command strings and copy the command to the current input string */
1089                 console->CommandScrollBack--;
1090                 memset(console->RCommand, 0, CON_CHARS_PER_LINE);
1091                 memset(console->LCommand, 0, CON_CHARS_PER_LINE);
1092                 console->Offset = 0;
1093                 if(console->CommandScrollBack > -1)
1094                         strcpy(console->LCommand, console->CommandLines[console->CommandScrollBack]);
1095                 console->CursorPos = strlen(console->LCommand);
1096                 CON_UpdateConsole(console);
1097         }
1098 }
1099