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2004-08-16 Casper S. Hornstrup <chorns@users.sourceforge.net>
[reactos.git] / reactos / subsys / system / cmd / cmdinput.c
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 pre-empted 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 carrage return output to better match MSDOS with echo
80 * on or off.(marked with "JPP 19980708")
81 *
82 * 13-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
83 * Added insert/overwrite cursor.
84 *
85 * 25-Jan-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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 <ekohl@abo.rhein-zeitung.de>)
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
100 #include "config.h"
101
102 #include "precomp.h"
103 #include <tchar.h>
104 #include <string.h>
105
106 #include "batch.h"
107
108
109 SHORT maxx;
110 SHORT maxy;
111
112 /*
113 * global command line insert/overwrite flag
114 */
115 static BOOL bInsert = TRUE;
116
117
118 static VOID
119 ClearCommandLine (LPTSTR str, INT maxlen, SHORT orgx, SHORT orgy)
120 {
121 INT count;
122
123 SetCursorXY (orgx, orgy);
124 for (count = 0; count < (INT)_tcslen (str); count++)
125 ConOutChar (_T(' '));
126 _tcsnset (str, _T('\0'), maxlen);
127 SetCursorXY (orgx, orgy);
128 }
129
130
131 /* read in a command line */
132 VOID ReadCommand (LPTSTR str, INT maxlen)
133 {
134 SHORT orgx; /* origin x/y */
135 SHORT orgy;
136 SHORT curx; /*current x/y cursor position*/
137 SHORT cury;
138 SHORT tempscreen;
139 INT count; /*used in some for loops*/
140 INT current = 0; /*the position of the cursor in the string (str)*/
141 INT charcount = 0;/*chars in the string (str)*/
142 INPUT_RECORD ir;
143 WORD wLastKey = 0;
144 TCHAR ch;
145 BOOL bContinue=FALSE;/*is TRUE the second case will not be executed*/
146
147 /* get screen size */
148 GetScreenSize (&maxx, &maxy);
149
150 /* JPP 19980807 - if echo off, don't print prompt */
151 if (bEcho)
152 PrintPrompt();
153
154 GetCursorXY (&orgx, &orgy);
155 GetCursorXY (&curx, &cury);
156
157 memset (str, 0, maxlen * sizeof (TCHAR));
158
159 SetCursorType (bInsert, TRUE);
160
161 do
162 {
163 ConInKey (&ir);
164
165 if (ir.Event.KeyEvent.dwControlKeyState &
166 (RIGHT_ALT_PRESSED|RIGHT_ALT_PRESSED|
167 RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED) )
168 {
169
170 switch (ir.Event.KeyEvent.wVirtualKeyCode)
171 {
172
173 #ifdef FEATURE_HISTORY
174
175 case 'K':
176 /*add the current command line to the history*/
177 if (ir.Event.KeyEvent.dwControlKeyState &
178 (LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED))
179 {
180
181 if (str[0])
182 History(0,str);
183
184 ClearCommandLine (str, maxlen, orgx, orgy);
185 current = charcount = 0;
186 curx = orgx;
187 cury = orgy;
188 bContinue=TRUE;
189 break;
190 }
191
192 case 'D':
193 /*delete current history entry*/
194 if (ir.Event.KeyEvent.dwControlKeyState &
195 (LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED))
196 {
197 ClearCommandLine (str, maxlen, orgx, orgy);
198 History_del_current_entry(str);
199 current = charcount = _tcslen (str);
200 ConOutPrintf (_T("%s"), str);
201 GetCursorXY (&curx, &cury);
202 bContinue=TRUE;
203 break;
204 }
205
206 #endif/*FEATURE_HISTORY*/
207 }
208
209
210
211
212 }
213
214 //if (bContinue)
215 // continue;
216
217
218
219 switch (ir.Event.KeyEvent.wVirtualKeyCode)
220 {
221 case VK_BACK:
222 /* <BACKSPACE> - delete character to left of cursor */
223 if (current > 0 && charcount > 0)
224 {
225 if (current == charcount)
226 {
227 /* if at end of line */
228 str[current - 1] = _T('\0');
229 if (GetCursorX () != 0)
230 {
231 ConOutPrintf (_T("\b \b"));
232 curx--;
233 }
234 else
235 {
236 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
237 ConOutChar (_T(' '));
238 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
239 cury--;
240 curx = maxx - 1;
241 }
242 }
243 else
244 {
245 for (count = current - 1; count < charcount; count++)
246 str[count] = str[count + 1];
247 if (GetCursorX () != 0)
248 {
249 SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ());
250 curx--;
251 }
252 else
253 {
254 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
255 cury--;
256 curx = maxx - 1;
257 }
258 GetCursorXY (&curx, &cury);
259 ConOutPrintf (_T("%s "), &str[current - 1]);
260 SetCursorXY (curx, cury);
261 }
262 charcount--;
263 current--;
264 }
265 break;
266
267 case VK_INSERT:
268 /* toggle insert/overstrike mode */
269 bInsert ^= TRUE;
270 SetCursorType (bInsert, TRUE);
271 break;
272
273 case VK_DELETE:
274 /* delete character under cursor */
275 if (current != charcount && charcount > 0)
276 {
277 for (count = current; count < charcount; count++)
278 str[count] = str[count + 1];
279 charcount--;
280 GetCursorXY (&curx, &cury);
281 ConOutPrintf (_T("%s "), &str[current]);
282 SetCursorXY (curx, cury);
283 }
284 break;
285
286 case VK_HOME:
287 /* goto beginning of string */
288 if (current != 0)
289 {
290 SetCursorXY (orgx, orgy);
291 curx = orgx;
292 cury = orgy;
293 current = 0;
294 }
295 break;
296
297 case VK_END:
298 /* goto end of string */
299 if (current != charcount)
300 {
301 SetCursorXY (orgx, orgy);
302 ConOutPrintf (_T("%s"), str);
303 GetCursorXY (&curx, &cury);
304 current = charcount;
305 }
306 break;
307
308 case VK_TAB:
309 #ifdef FEATURE_UNIX_FILENAME_COMPLETION
310 /* expand current file name */
311 if ((current == charcount) ||
312 (current == charcount - 1 &&
313 str[current] == _T('"'))) /* only works at end of line*/
314 {
315 if (wLastKey != VK_TAB)
316 {
317 /* if first TAB, complete filename*/
318 tempscreen = charcount;
319 CompleteFilename (str, charcount);
320 charcount = _tcslen (str);
321 current = charcount;
322
323 if (current > 0 &&
324 str[current-1] == _T('"'))
325 current--;
326
327 SetCursorXY (orgx, orgy);
328 ConOutPrintf (_T("%s"), str);
329
330 if (tempscreen > charcount)
331 {
332 GetCursorXY (&curx, &cury);
333 for (count = tempscreen - charcount; count--; )
334 ConOutChar (_T(' '));
335 SetCursorXY (curx, cury);
336 }
337 else
338 {
339 if (((charcount + orgx) / maxx) + orgy > maxy - 1)
340 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
341 }
342
343 /* set cursor position */
344 SetCursorXY ((orgx + current) % maxx,
345 orgy + (orgx + current) / maxx);
346 GetCursorXY (&curx, &cury);
347 }
348 else
349 {
350 /*if second TAB, list matches*/
351 if (ShowCompletionMatches (str, charcount))
352 {
353 PrintPrompt ();
354 GetCursorXY (&orgx, &orgy);
355 ConOutPrintf (_T("%s"), str);
356
357 /* set cursor position */
358 SetCursorXY ((orgx + current) % maxx,
359 orgy + (orgx + current) / maxx);
360 GetCursorXY (&curx, &cury);
361 }
362
363 }
364 }
365 else
366 {
367 #ifdef __REACTOS__
368 Beep (440, 50);
369 #else
370 MessageBeep (-1);
371 #endif
372 }
373 #endif
374 #ifdef FEATURE_4NT_FILENAME_COMPLETION
375 /* this is not implemented yet */
376 if (ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
377 {
378 /* get previous match */
379
380 }
381 else
382 {
383 /* get next match */
384
385 }
386 #endif
387 break;
388
389 case VK_RETURN:
390 /* end input, return to main */
391 #ifdef FEATURE_HISTORY
392 /* add to the history */
393 if (str[0])
394 History (0, str);
395 #endif
396 ConInDummy ();
397 ConOutChar (_T('\n'));
398 break;
399
400 case VK_ESCAPE:
401 /* clear str Make this callable! */
402 ClearCommandLine (str, maxlen, orgx, orgy);
403 curx = orgx;
404 cury = orgy;
405 current = charcount = 0;
406 break;
407
408 #ifdef FEATURE_HISTORY
409 case VK_F3:
410 History_move_to_bottom();
411 #endif
412 case VK_UP:
413 #ifdef FEATURE_HISTORY
414 /* get previous command from buffer */
415 ClearCommandLine (str, maxlen, orgx, orgy);
416 History (-1, str);
417 current = charcount = _tcslen (str);
418 if (((charcount + orgx) / maxx) + orgy > maxy - 1)
419 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
420 ConOutPrintf (_T("%s"), str);
421 GetCursorXY (&curx, &cury);
422 #endif
423 break;
424
425 case VK_DOWN:
426 #ifdef FEATURE_HISTORY
427 /* get next command from buffer */
428 ClearCommandLine (str, maxlen, orgx, orgy);
429 History (1, str);
430 current = charcount = _tcslen (str);
431 if (((charcount + orgx) / maxx) + orgy > maxy - 1)
432 orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
433 ConOutPrintf (_T("%s"), str);
434 GetCursorXY (&curx, &cury);
435 #endif
436 break;
437
438 case VK_LEFT:
439 /* move cursor left */
440 if (current > 0)
441 {
442 current--;
443 if (GetCursorX () == 0)
444 {
445 SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
446 curx = maxx - 1;
447 cury--;
448 }
449 else
450 {
451 SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ());
452 curx--;
453 }
454 }
455 else
456 {
457 #ifdef __REACTOS__
458 Beep (440, 50);
459 #else
460 MessageBeep (-1);
461 #endif
462 }
463 break;
464
465 case VK_RIGHT:
466 /* move cursor right */
467 if (current != charcount)
468 {
469 current++;
470 if (GetCursorX () == maxx - 1)
471 {
472 SetCursorXY (0, (SHORT)(GetCursorY () + 1));
473 curx = 0;
474 cury++;
475 }
476 else
477 {
478 SetCursorXY ((SHORT)(GetCursorX () + 1), GetCursorY ());
479 curx++;
480 }
481 }
482 break;
483
484 default:
485 #ifdef _UNICODE
486 ch = ir.Event.KeyEvent.uChar.UnicodeChar;
487 if ((ch >= 32 && ch <= 255) && (charcount != (maxlen - 2)))
488 #else
489 ch = ir.Event.KeyEvent.uChar.AsciiChar;
490 if ((UCHAR)ch >= 32 && (charcount != (maxlen - 2)))
491 #endif /* _UNICODE */
492 {
493 /* insert character into string... */
494 if (bInsert && current != charcount)
495 {
496 /* If this character insertion will cause screen scrolling,
497 * adjust the saved origin of the command prompt. */
498 tempscreen = _tcslen(str + current) + curx;
499 if ((tempscreen % maxx) == (maxx - 1) &&
500 (tempscreen / maxx) + cury == (maxy - 1))
501 {
502 orgy--;
503 cury--;
504 }
505
506 for (count = charcount; count > current; count--)
507 str[count] = str[count - 1];
508 str[current++] = ch;
509 if (curx == maxx - 1)
510 curx = 0, cury++;
511 else
512 curx++;
513 ConOutPrintf (_T("%s"), &str[current - 1]);
514 SetCursorXY (curx, cury);
515 charcount++;
516 }
517 else
518 {
519 if (current == charcount)
520 charcount++;
521 str[current++] = ch;
522 if (GetCursorX () == maxx - 1 && GetCursorY () == maxy - 1)
523 orgy--, cury--;
524 if (GetCursorX () == maxx - 1)
525 curx = 0, cury++;
526 else
527 curx++;
528 ConOutChar (ch);
529 }
530 }
531 #if 0
532 else
533 {
534 #ifdef __REACTOS__
535 Beep (440, 100);
536 #else
537 MessageBeep (-1);
538 #endif
539 }
540 #endif
541 break;
542
543 }
544 wLastKey = ir.Event.KeyEvent.wVirtualKeyCode;
545 }
546 while (ir.Event.KeyEvent.wVirtualKeyCode != VK_RETURN);
547
548 SetCursorType (bInsert, TRUE);
549 }
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