1 /* 2 * CMDINPUT.C - handles command input (tab completion, history, etc.). 3 * 4 * 5 * History: 6 * 7 * 01/14/95 (Tim Norman) 8 * started. 9 * 10 * 08/08/95 (Matt Rains) 11 * i have cleaned up the source code. changes now bring this source 12 * into guidelines for recommended programming practice. 13 * i have added some constants to help making changes easier. 14 * 15 * 12/12/95 (Tim Norman) 16 * added findxy() function to get max x/y coordinates to display 17 * correctly on larger screens 18 * 19 * 12/14/95 (Tim Norman) 20 * fixed the Tab completion code that Matt Rains broke by moving local 21 * variables to a more global scope and forgetting to initialize them 22 * when needed 23 * 24 * 8/1/96 (Tim Norman) 25 * fixed a bug in tab completion that caused filenames at the beginning 26 * of the command-line to have their first letter truncated 27 * 28 * 9/1/96 (Tim Norman) 29 * fixed a silly bug using printf instead of fputs, where typing "%i" 30 * confused printf :) 31 * 32 * 6/14/97 (Steffan Kaiser) 33 * ctrl-break checking 34 * 35 * 6/7/97 (Marc Desrochers) 36 * recoded everything! now properly adjusts when text font is changed. 37 * removed findxy(), reposition(), and reprint(), as these functions 38 * were inefficient. added goxy() function as gotoxy() was buggy when 39 * the screen font was changed. the printf() problem with %i on the 40 * command line was fixed by doing printf("%s",str) instead of 41 * printf(str). Don't ask how I find em just be glad I do :) 42 * 43 * 7/12/97 (Tim Norman) 44 * Note: above changes preempted Steffan's ctrl-break checking. 45 * 46 * 7/7/97 (Marc Desrochers) 47 * rewrote a new findxy() because the new dir() used it. This 48 * findxy() simply returns the values of *maxx *maxy. In the 49 * future, please use the pointers, they will always be correct 50 * since they point to BIOS values. 51 * 52 * 7/8/97 (Marc Desrochers) 53 * once again removed findxy(), moved the *maxx, *maxy pointers 54 * global and included them as externs in command.h. Also added 55 * insert/overstrike capability 56 * 57 * 7/13/97 (Tim Norman) 58 * added different cursor appearance for insert/overstrike mode 59 * 60 * 7/13/97 (Tim Norman) 61 * changed my code to use _setcursortype until I can figure out why 62 * my code is crashing on some machines. It doesn't crash on mine :) 63 * 64 * 27-Jul-1998 (John P Price <linux-guru@gcfl.net>) 65 * added config.h include 66 * 67 * 28-Jul-1998 (John P Price <linux-guru@gcfl.net>) 68 * put ifdef's around filename completion code. 69 * 70 * 30-Jul-1998 (John P Price <linux-guru@gcfl.net>) 71 * moved filename completion code to filecomp.c 72 * made second TAB display list of filename matches 73 * 74 * 31-Jul-1998 (John P Price <linux-guru@gcfl.net>) 75 * Fixed bug where if you typed something, then hit HOME, then tried 76 * to type something else in insert mode, it crashed. 77 * 78 * 07-Aug-1998 (John P Price <linux-guru@gcfl.net>) 79 * Fixed carriage return output to better match MSDOS with echo 80 * on or off.(marked with "JPP 19980708") 81 * 82 * 13-Dec-1998 (Eric Kohl) 83 * Added insert/overwrite cursor. 84 * 85 * 25-Jan-1998 (Eric Kohl) 86 * Replaced CRT io functions by Win32 console io functions. 87 * This can handle <Shift>-<Tab> for 4NT filename completion. 88 * Unicode and redirection safe! 89 * 90 * 04-Feb-1999 (Eric Kohl) 91 * Fixed input bug. A "line feed" character remained in the keyboard 92 * input queue when you pressed <RETURN>. This sometimes caused 93 * some very strange effects. 94 * Fixed some command line editing annoyances. 95 * 96 * 30-Apr-2004 (Filip Navara <xnavara@volny.cz>) 97 * Fixed problems when the screen was scrolled away. 98 * 99 * 28-September-2007 (Hervé Poussineau) 100 * Added history possibilities to right key. 101 */ 102 103 #include "precomp.h" 104 105 /* 106 * See https://technet.microsoft.com/en-us/library/cc978715.aspx 107 * and https://technet.microsoft.com/en-us/library/cc940805.aspx 108 * to know the differences between those two settings. 109 * Values 0x00, 0x0D (carriage return) and 0x20 (space) disable completion. 110 */ 111 TCHAR AutoCompletionChar = _T('\t'); // Default is 0x20 112 TCHAR PathCompletionChar = _T('\t'); // Default is 0x20 113 114 115 SHORT maxx; 116 SHORT maxy; 117 118 /* 119 * global command line insert/overwrite flag 120 */ 121 static BOOL bInsert = TRUE; 122 123 124 static VOID 125 ClearCommandLine(LPTSTR str, INT maxlen, SHORT orgx, SHORT orgy) 126 { 127 INT count; 128 129 SetCursorXY (orgx, orgy); 130 for (count = 0; count < (INT)_tcslen (str); count++) 131 ConOutChar (_T(' ')); 132 _tcsnset (str, _T('\0'), maxlen); 133 SetCursorXY (orgx, orgy); 134 } 135 136 137 /* read in a command line */ 138 BOOL ReadCommand(LPTSTR str, INT maxlen) 139 { 140 CONSOLE_SCREEN_BUFFER_INFO csbi; 141 SHORT orgx; /* origin x/y */ 142 SHORT orgy; 143 SHORT curx; /*current x/y cursor position*/ 144 SHORT cury; 145 SIZE_T tempscreen; 146 INT count; /*used in some for loops*/ 147 INT current = 0; /*the position of the cursor in the string (str)*/ 148 INT charcount = 0;/*chars in the string (str)*/ 149 INPUT_RECORD ir; 150 DWORD dwControlKeyState; 151 #ifdef FEATURE_UNIX_FILENAME_COMPLETION 152 WORD wLastKey = 0; 153 #endif 154 TCHAR ch; 155 BOOL bReturn = FALSE; 156 BOOL bCharInput; 157 #ifdef FEATURE_4NT_FILENAME_COMPLETION 158 TCHAR szPath[MAX_PATH]; 159 #endif 160 #ifdef FEATURE_HISTORY 161 //BOOL bContinue=FALSE;/*is TRUE the second case will not be executed*/ 162 TCHAR PreviousChar; 163 #endif 164 165 if (!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi)) 166 { 167 /* No console */ 168 HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE); 169 DWORD dwRead; 170 CHAR chr; 171 do 172 { 173 if (!ReadFile(hStdin, &chr, 1, &dwRead, NULL) || !dwRead) 174 return FALSE; 175 #ifdef _UNICODE 176 MultiByteToWideChar(InputCodePage, 0, &chr, 1, &str[charcount++], 1); 177 #endif 178 } while (chr != '\n' && charcount < maxlen); 179 str[charcount] = _T('\0'); 180 return TRUE; 181 } 182 183 /* get screen size */ 184 maxx = csbi.dwSize.X; 185 maxy = csbi.dwSize.Y; 186 187 curx = orgx = csbi.dwCursorPosition.X; 188 cury = orgy = csbi.dwCursorPosition.Y; 189 190 memset (str, 0, maxlen * sizeof (TCHAR)); 191 192 SetCursorType (bInsert, TRUE); 193 194 do 195 { 196 bReturn = FALSE; 197 ConInKey (&ir); 198 199 dwControlKeyState = ir.Event.KeyEvent.dwControlKeyState; 200 201 if (dwControlKeyState & 202 (RIGHT_ALT_PRESSED |LEFT_ALT_PRESSED| 203 RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED) ) 204 { 205 switch (ir.Event.KeyEvent.wVirtualKeyCode) 206 { 207 #ifdef FEATURE_HISTORY 208 case _T('K'): 209 /* add the current command line to the history */ 210 if (dwControlKeyState & 211 (LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED)) 212 { 213 if (str[0]) 214 History(0,str); 215 216 ClearCommandLine (str, maxlen, orgx, orgy); 217 current = charcount = 0; 218 curx = orgx; 219 cury = orgy; 220 //bContinue=TRUE; 221 break; 222 } 223 224 case _T('D'): 225 /* delete current history entry */ 226 if (dwControlKeyState & 227 (LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED)) 228 { 229 ClearCommandLine (str, maxlen, orgx, orgy); 230 History_del_current_entry(str); 231 current = charcount = _tcslen (str); 232 ConOutPrintf (_T("%s"), str); 233 GetCursorXY (&curx, &cury); 234 //bContinue=TRUE; 235 break; 236 } 237 #endif /*FEATURE_HISTORY*/ 238 239 case _T('M'): 240 /* ^M does the same as return */ 241 if (dwControlKeyState & 242 (LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED)) 243 { 244 /* end input, return to main */ 245 #ifdef FEATURE_HISTORY 246 /* add to the history */ 247 if (str[0]) 248 History(0, str); 249 #endif /*FEATURE_HISTORY*/ 250 str[charcount++] = _T('\n'); 251 str[charcount] = _T('\0'); 252 ConOutChar (_T('\n')); 253 bReturn = TRUE; 254 break; 255 } 256 } 257 } 258 259 bCharInput = FALSE; 260 261 switch (ir.Event.KeyEvent.wVirtualKeyCode) 262 { 263 case VK_BACK: 264 /* <BACKSPACE> - delete character to left of cursor */ 265 if (current > 0 && charcount > 0) 266 { 267 if (current == charcount) 268 { 269 /* if at end of line */ 270 str[current - 1] = _T('\0'); 271 if (GetCursorX () != 0) 272 { 273 ConOutPrintf (_T("\b \b")); 274 curx--; 275 } 276 else 277 { 278 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1)); 279 ConOutChar (_T(' ')); 280 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1)); 281 cury--; 282 curx = maxx - 1; 283 } 284 } 285 else 286 { 287 for (count = current - 1; count < charcount; count++) 288 str[count] = str[count + 1]; 289 if (GetCursorX () != 0) 290 { 291 SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ()); 292 curx--; 293 } 294 else 295 { 296 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1)); 297 cury--; 298 curx = maxx - 1; 299 } 300 GetCursorXY (&curx, &cury); 301 ConOutPrintf (_T("%s "), &str[current - 1]); 302 SetCursorXY (curx, cury); 303 } 304 charcount--; 305 current--; 306 } 307 break; 308 309 case VK_INSERT: 310 /* toggle insert/overstrike mode */ 311 bInsert ^= TRUE; 312 SetCursorType (bInsert, TRUE); 313 break; 314 315 case VK_DELETE: 316 /* delete character under cursor */ 317 if (current != charcount && charcount > 0) 318 { 319 for (count = current; count < charcount; count++) 320 str[count] = str[count + 1]; 321 charcount--; 322 GetCursorXY (&curx, &cury); 323 ConOutPrintf (_T("%s "), &str[current]); 324 SetCursorXY (curx, cury); 325 } 326 break; 327 328 case VK_HOME: 329 /* goto beginning of string */ 330 if (current != 0) 331 { 332 SetCursorXY (orgx, orgy); 333 curx = orgx; 334 cury = orgy; 335 current = 0; 336 } 337 break; 338 339 case VK_END: 340 /* goto end of string */ 341 if (current != charcount) 342 { 343 SetCursorXY (orgx, orgy); 344 ConOutPrintf (_T("%s"), str); 345 GetCursorXY (&curx, &cury); 346 current = charcount; 347 } 348 break; 349 350 case VK_TAB: 351 #ifdef FEATURE_UNIX_FILENAME_COMPLETION 352 /* expand current file name */ 353 if ((current == charcount) || 354 (current == charcount - 1 && 355 str[current] == _T('"'))) /* only works at end of line*/ 356 { 357 if (wLastKey != VK_TAB) 358 { 359 /* if first TAB, complete filename*/ 360 tempscreen = charcount; 361 CompleteFilename (str, charcount); 362 charcount = _tcslen (str); 363 current = charcount; 364 365 SetCursorXY (orgx, orgy); 366 ConOutPrintf (_T("%s"), str); 367 368 if (tempscreen > charcount) 369 { 370 GetCursorXY (&curx, &cury); 371 for (count = tempscreen - charcount; count--; ) 372 ConOutChar (_T(' ')); 373 SetCursorXY (curx, cury); 374 } 375 else 376 { 377 if (((charcount + orgx) / maxx) + orgy > maxy - 1) 378 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1); 379 } 380 381 /* set cursor position */ 382 SetCursorXY ((orgx + current) % maxx, 383 orgy + (orgx + current) / maxx); 384 GetCursorXY (&curx, &cury); 385 } 386 else 387 { 388 /*if second TAB, list matches*/ 389 if (ShowCompletionMatches (str, charcount)) 390 { 391 PrintPrompt(); 392 GetCursorXY(&orgx, &orgy); 393 ConOutPrintf(_T("%s"), str); 394 395 /* set cursor position */ 396 SetCursorXY((orgx + current) % maxx, 397 orgy + (orgx + current) / maxx); 398 GetCursorXY(&curx, &cury); 399 } 400 401 } 402 } 403 else 404 { 405 MessageBeep(-1); 406 } 407 #endif 408 #ifdef FEATURE_4NT_FILENAME_COMPLETION 409 /* used to later see if we went down to the next line */ 410 tempscreen = charcount; 411 szPath[0]=_T('\0'); 412 413 /* str is the whole things that is on the current line 414 that is and and out. arg 2 is weather it goes back 415 one file or forward one file */ 416 CompleteFilename(str, !(ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED), szPath, current); 417 /* Attempt to clear the line */ 418 ClearCommandLine (str, maxlen, orgx, orgy); 419 curx = orgx; 420 cury = orgy; 421 current = charcount = 0; 422 423 /* Everything is deleted, lets add it back in */ 424 _tcscpy(str,szPath); 425 426 /* Figure out where cusor is going to be after we print it */ 427 charcount = _tcslen(str); 428 current = charcount; 429 430 SetCursorXY(orgx, orgy); 431 /* Print out what we have now */ 432 ConOutPrintf(_T("%s"), str); 433 434 /* Move cursor accordingly */ 435 if (tempscreen > charcount) 436 { 437 GetCursorXY(&curx, &cury); 438 for(count = tempscreen - charcount; count--; ) 439 ConOutChar(_T(' ')); 440 SetCursorXY(curx, cury); 441 } 442 else 443 { 444 if (((charcount + orgx) / maxx) + orgy > maxy - 1) 445 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1); 446 } 447 SetCursorXY((short)(((int)orgx + current) % maxx), (short)((int)orgy + ((int)orgx + current) / maxx)); 448 GetCursorXY(&curx, &cury); 449 #endif 450 break; 451 452 case _T('C'): 453 if ((ir.Event.KeyEvent.dwControlKeyState & 454 (RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED))) 455 { 456 /* Ignore the Ctrl-C key event if it has already been handled */ 457 if (!bCtrlBreak) 458 break; 459 460 /* 461 * Fully print the entered string 462 * so the command prompt would not overwrite it. 463 */ 464 SetCursorXY(orgx, orgy); 465 ConOutPrintf(_T("%s"), str); 466 467 /* 468 * A Ctrl-C. Do not clear the command line, 469 * but return an empty string in str. 470 */ 471 str[0] = _T('\0'); 472 curx = orgx; 473 cury = orgy; 474 current = charcount = 0; 475 bReturn = TRUE; 476 } 477 else 478 { 479 /* Just a normal 'C' character */ 480 bCharInput = TRUE; 481 } 482 break; 483 484 case VK_RETURN: 485 /* end input, return to main */ 486 #ifdef FEATURE_HISTORY 487 /* add to the history */ 488 if (str[0]) 489 History(0, str); 490 #endif 491 str[charcount++] = _T('\n'); 492 str[charcount] = _T('\0'); 493 ConOutChar(_T('\n')); 494 bReturn = TRUE; 495 break; 496 497 case VK_ESCAPE: 498 /* clear str Make this callable! */ 499 ClearCommandLine (str, maxlen, orgx, orgy); 500 curx = orgx; 501 cury = orgy; 502 current = charcount = 0; 503 break; 504 505 #ifdef FEATURE_HISTORY 506 case VK_F3: 507 History_move_to_bottom(); 508 #endif 509 case VK_UP: 510 #ifdef FEATURE_HISTORY 511 /* get previous command from buffer */ 512 ClearCommandLine (str, maxlen, orgx, orgy); 513 History(-1, str); 514 current = charcount = _tcslen (str); 515 if (((charcount + orgx) / maxx) + orgy > maxy - 1) 516 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1); 517 ConOutPrintf (_T("%s"), str); 518 GetCursorXY (&curx, &cury); 519 #endif 520 break; 521 522 case VK_DOWN: 523 #ifdef FEATURE_HISTORY 524 /* get next command from buffer */ 525 ClearCommandLine (str, maxlen, orgx, orgy); 526 History(1, str); 527 current = charcount = _tcslen (str); 528 if (((charcount + orgx) / maxx) + orgy > maxy - 1) 529 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1); 530 ConOutPrintf (_T("%s"), str); 531 GetCursorXY (&curx, &cury); 532 #endif 533 break; 534 535 case VK_LEFT: 536 if (dwControlKeyState & (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED)) 537 { 538 /* move cursor to the previous word */ 539 if (current > 0) 540 { 541 while (current > 0 && str[current - 1] == _T(' ')) 542 { 543 current--; 544 if (curx == 0) 545 { 546 cury--; 547 curx = maxx -1; 548 } 549 else 550 { 551 curx--; 552 } 553 } 554 555 while (current > 0 && str[current -1] != _T(' ')) 556 { 557 current--; 558 if (curx == 0) 559 { 560 cury--; 561 curx = maxx -1; 562 } 563 else 564 { 565 curx--; 566 } 567 } 568 569 SetCursorXY(curx, cury); 570 } 571 } 572 else 573 { 574 /* move cursor left */ 575 if (current > 0) 576 { 577 current--; 578 if (GetCursorX () == 0) 579 { 580 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1)); 581 curx = maxx - 1; 582 cury--; 583 } 584 else 585 { 586 SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ()); 587 curx--; 588 } 589 } 590 else 591 { 592 MessageBeep (-1); 593 } 594 } 595 break; 596 597 case VK_RIGHT: 598 if (dwControlKeyState & (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED)) 599 { 600 /* move cursor to the next word */ 601 if (current != charcount) 602 { 603 while (current != charcount && str[current] != _T(' ')) 604 { 605 current++; 606 if (curx == maxx - 1) 607 { 608 cury++; 609 curx = 0; 610 } 611 else 612 { 613 curx++; 614 } 615 } 616 617 while (current != charcount && str[current] == _T(' ')) 618 { 619 current++; 620 if (curx == maxx - 1) 621 { 622 cury++; 623 curx = 0; 624 } 625 else 626 { 627 curx++; 628 } 629 } 630 631 SetCursorXY(curx, cury); 632 } 633 } 634 else 635 { 636 /* move cursor right */ 637 if (current != charcount) 638 { 639 current++; 640 if (GetCursorX () == maxx - 1) 641 { 642 SetCursorXY (0, (SHORT)(GetCursorY () + 1)); 643 curx = 0; 644 cury++; 645 } 646 else 647 { 648 SetCursorXY ((SHORT)(GetCursorX () + 1), GetCursorY ()); 649 curx++; 650 } 651 } 652 #ifdef FEATURE_HISTORY 653 else 654 { 655 LPCTSTR last = PeekHistory(-1); 656 if (last && charcount < (INT)_tcslen (last)) 657 { 658 PreviousChar = last[current]; 659 ConOutChar(PreviousChar); 660 GetCursorXY(&curx, &cury); 661 str[current++] = PreviousChar; 662 charcount++; 663 } 664 } 665 #endif 666 } 667 break; 668 669 default: 670 /* This input is just a normal char */ 671 bCharInput = TRUE; 672 673 } 674 #ifdef _UNICODE 675 ch = ir.Event.KeyEvent.uChar.UnicodeChar; 676 if (ch >= 32 && (charcount != (maxlen - 2)) && bCharInput) 677 #else 678 ch = ir.Event.KeyEvent.uChar.AsciiChar; 679 if ((UCHAR)ch >= 32 && (charcount != (maxlen - 2)) && bCharInput) 680 #endif /* _UNICODE */ 681 { 682 /* insert character into string... */ 683 if (bInsert && current != charcount) 684 { 685 /* If this character insertion will cause screen scrolling, 686 * adjust the saved origin of the command prompt. */ 687 tempscreen = _tcslen(str + current) + curx; 688 if ((tempscreen % maxx) == (maxx - 1) && 689 (tempscreen / maxx) + cury == (maxy - 1)) 690 { 691 orgy--; 692 cury--; 693 } 694 695 for (count = charcount; count > current; count--) 696 str[count] = str[count - 1]; 697 str[current++] = ch; 698 if (curx == maxx - 1) 699 curx = 0, cury++; 700 else 701 curx++; 702 ConOutPrintf (_T("%s"), &str[current - 1]); 703 SetCursorXY (curx, cury); 704 charcount++; 705 } 706 else 707 { 708 if (current == charcount) 709 charcount++; 710 str[current++] = ch; 711 if (GetCursorX () == maxx - 1 && GetCursorY () == maxy - 1) 712 orgy--, cury--; 713 if (GetCursorX () == maxx - 1) 714 curx = 0, cury++; 715 else 716 curx++; 717 ConOutChar (ch); 718 } 719 } 720 721 //wLastKey = ir.Event.KeyEvent.wVirtualKeyCode; 722 } 723 while (!bReturn); 724 725 SetCursorType (bInsert, TRUE); 726 727 #ifdef FEATURE_ALIASES 728 /* expand all aliases */ 729 ExpandAlias (str, maxlen); 730 #endif /* FEATURE_ALIAS */ 731 return TRUE; 732 } 733