2 * CMDINPUT.C - handles command input (tab completion, history, etc.).
7 * 01/14/95 (Tim Norman)
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.
15 * 12/12/95 (Tim Norman)
16 * added findxy() function to get max x/y coordinates to display
17 * correctly on larger screens
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
25 * fixed a bug in tab completion that caused filenames at the beginning
26 * of the command-line to have their first letter truncated
29 * fixed a silly bug using printf instead of fputs, where typing "%i"
32 * 6/14/97 (Steffan Kaiser)
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 :)
43 * 7/12/97 (Tim Norman)
44 * Note: above changes pre-empted Steffan's ctrl-break checking.
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.
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
57 * 7/13/97 (Tim Norman)
58 * added different cursor appearance for insert/overstrike mode
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 :)
64 * 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
65 * added config.h include
67 * 28-Jul-1998 (John P Price <linux-guru@gcfl.net>)
68 * put ifdef's around filename completion code.
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
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.
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")
82 * 13-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
83 * Added insert/overwrite cursor.
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!
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.
96 * 30-Apr-2004 (Filip Navara <xnavara@volny.cz>)
97 * Fixed problems when the screen was scrolled away.
107 * global command line insert/overwrite flag
109 static BOOL bInsert
= TRUE
;
113 ClearCommandLine (LPTSTR str
, INT maxlen
, SHORT orgx
, SHORT orgy
)
117 SetCursorXY (orgx
, orgy
);
118 for (count
= 0; count
< (INT
)_tcslen (str
); count
++)
119 ConOutChar (_T(' '));
120 _tcsnset (str
, _T('\0'), maxlen
);
121 SetCursorXY (orgx
, orgy
);
125 /* read in a command line */
126 VOID
ReadCommand (LPTSTR str
, INT maxlen
)
128 SHORT orgx
; /* origin x/y */
130 SHORT curx
; /*current x/y cursor position*/
133 INT count
; /*used in some for loops*/
134 INT current
= 0; /*the position of the cursor in the string (str)*/
135 INT charcount
= 0;/*chars in the string (str)*/
139 BOOL bContinue
=FALSE
;/*is TRUE the second case will not be executed*/
141 /* get screen size */
142 GetScreenSize (&maxx
, &maxy
);
144 /* JPP 19980807 - if echo off, don't print prompt */
148 GetCursorXY (&orgx
, &orgy
);
149 GetCursorXY (&curx
, &cury
);
151 memset (str
, 0, maxlen
* sizeof (TCHAR
));
153 SetCursorType (bInsert
, TRUE
);
159 if (ir
.Event
.KeyEvent
.dwControlKeyState
&
160 (RIGHT_ALT_PRESSED
|RIGHT_ALT_PRESSED
|
161 RIGHT_CTRL_PRESSED
|LEFT_CTRL_PRESSED
) )
164 switch (ir
.Event
.KeyEvent
.wVirtualKeyCode
)
167 #ifdef FEATURE_HISTORY
170 /*add the current command line to the history*/
171 if (ir
.Event
.KeyEvent
.dwControlKeyState
&
172 (LEFT_CTRL_PRESSED
|RIGHT_CTRL_PRESSED
))
178 ClearCommandLine (str
, maxlen
, orgx
, orgy
);
179 current
= charcount
= 0;
187 /*delete current history entry*/
188 if (ir
.Event
.KeyEvent
.dwControlKeyState
&
189 (LEFT_CTRL_PRESSED
|RIGHT_CTRL_PRESSED
))
191 ClearCommandLine (str
, maxlen
, orgx
, orgy
);
192 History_del_current_entry(str
);
193 current
= charcount
= _tcslen (str
);
194 ConOutPrintf (_T("%s"), str
);
195 GetCursorXY (&curx
, &cury
);
200 #endif/*FEATURE_HISTORY*/
213 switch (ir
.Event
.KeyEvent
.wVirtualKeyCode
)
216 /* <BACKSPACE> - delete character to left of cursor */
217 if (current
> 0 && charcount
> 0)
219 if (current
== charcount
)
221 /* if at end of line */
222 str
[current
- 1] = _T('\0');
223 if (GetCursorX () != 0)
225 ConOutPrintf (_T("\b \b"));
230 SetCursorXY ((SHORT
)(maxx
- 1), (SHORT
)(GetCursorY () - 1));
231 ConOutChar (_T(' '));
232 SetCursorXY ((SHORT
)(maxx
- 1), (SHORT
)(GetCursorY () - 1));
239 for (count
= current
- 1; count
< charcount
; count
++)
240 str
[count
] = str
[count
+ 1];
241 if (GetCursorX () != 0)
243 SetCursorXY ((SHORT
)(GetCursorX () - 1), GetCursorY ());
248 SetCursorXY ((SHORT
)(maxx
- 1), (SHORT
)(GetCursorY () - 1));
252 GetCursorXY (&curx
, &cury
);
253 ConOutPrintf (_T("%s "), &str
[current
- 1]);
254 SetCursorXY (curx
, cury
);
262 /* toggle insert/overstrike mode */
264 SetCursorType (bInsert
, TRUE
);
268 /* delete character under cursor */
269 if (current
!= charcount
&& charcount
> 0)
271 for (count
= current
; count
< charcount
; count
++)
272 str
[count
] = str
[count
+ 1];
274 GetCursorXY (&curx
, &cury
);
275 ConOutPrintf (_T("%s "), &str
[current
]);
276 SetCursorXY (curx
, cury
);
281 /* goto beginning of string */
284 SetCursorXY (orgx
, orgy
);
292 /* goto end of string */
293 if (current
!= charcount
)
295 SetCursorXY (orgx
, orgy
);
296 ConOutPrintf (_T("%s"), str
);
297 GetCursorXY (&curx
, &cury
);
303 #ifdef FEATURE_UNIX_FILENAME_COMPLETION
304 /* expand current file name */
305 if ((current
== charcount
) ||
306 (current
== charcount
- 1 &&
307 str
[current
] == _T('"'))) /* only works at end of line*/
309 if (wLastKey
!= VK_TAB
)
311 /* if first TAB, complete filename*/
312 tempscreen
= charcount
;
313 CompleteFilename (str
, charcount
);
314 charcount
= _tcslen (str
);
318 str
[current
-1] == _T('"'))
321 SetCursorXY (orgx
, orgy
);
322 ConOutPrintf (_T("%s"), str
);
324 if (tempscreen
> charcount
)
326 GetCursorXY (&curx
, &cury
);
327 for (count
= tempscreen
- charcount
; count
--; )
328 ConOutChar (_T(' '));
329 SetCursorXY (curx
, cury
);
333 if (((charcount
+ orgx
) / maxx
) + orgy
> maxy
- 1)
334 orgy
+= maxy
- ((charcount
+ orgx
) / maxx
+ orgy
+ 1);
337 /* set cursor position */
338 SetCursorXY ((orgx
+ current
) % maxx
,
339 orgy
+ (orgx
+ current
) / maxx
);
340 GetCursorXY (&curx
, &cury
);
344 /*if second TAB, list matches*/
345 if (ShowCompletionMatches (str
, charcount
))
348 GetCursorXY (&orgx
, &orgy
);
349 ConOutPrintf (_T("%s"), str
);
351 /* set cursor position */
352 SetCursorXY ((orgx
+ current
) % maxx
,
353 orgy
+ (orgx
+ current
) / maxx
);
354 GetCursorXY (&curx
, &cury
);
368 #ifdef FEATURE_4NT_FILENAME_COMPLETION
369 /* this is not implemented yet */
370 if (ir
.Event
.KeyEvent
.dwControlKeyState
& SHIFT_PRESSED
)
372 /* get previous match */
384 /* end input, return to main */
385 #ifdef FEATURE_HISTORY
386 /* add to the history */
391 ConOutChar (_T('\n'));
395 /* clear str Make this callable! */
396 ClearCommandLine (str
, maxlen
, orgx
, orgy
);
399 current
= charcount
= 0;
402 #ifdef FEATURE_HISTORY
404 History_move_to_bottom();
407 #ifdef FEATURE_HISTORY
408 /* get previous command from buffer */
409 ClearCommandLine (str
, maxlen
, orgx
, orgy
);
411 current
= charcount
= _tcslen (str
);
412 if (((charcount
+ orgx
) / maxx
) + orgy
> maxy
- 1)
413 orgy
+= maxy
- ((charcount
+ orgx
) / maxx
+ orgy
+ 1);
414 ConOutPrintf (_T("%s"), str
);
415 GetCursorXY (&curx
, &cury
);
420 #ifdef FEATURE_HISTORY
421 /* get next command from buffer */
422 ClearCommandLine (str
, maxlen
, orgx
, orgy
);
424 current
= charcount
= _tcslen (str
);
425 if (((charcount
+ orgx
) / maxx
) + orgy
> maxy
- 1)
426 orgy
+= maxy
- ((charcount
+ orgx
) / maxx
+ orgy
+ 1);
427 ConOutPrintf (_T("%s"), str
);
428 GetCursorXY (&curx
, &cury
);
433 /* move cursor left */
437 if (GetCursorX () == 0)
439 SetCursorXY ((SHORT
)(maxx
- 1), (SHORT
)(GetCursorY () - 1));
445 SetCursorXY ((SHORT
)(GetCursorX () - 1), GetCursorY ());
460 /* move cursor right */
461 if (current
!= charcount
)
464 if (GetCursorX () == maxx
- 1)
466 SetCursorXY (0, (SHORT
)(GetCursorY () + 1));
472 SetCursorXY ((SHORT
)(GetCursorX () + 1), GetCursorY ());
480 ch
= ir
.Event
.KeyEvent
.uChar
.UnicodeChar
;
481 if ((ch
>= 32 && ch
<= 255) && (charcount
!= (maxlen
- 2)))
483 ch
= ir
.Event
.KeyEvent
.uChar
.AsciiChar
;
484 if ((UCHAR
)ch
>= 32 && (charcount
!= (maxlen
- 2)))
485 #endif /* _UNICODE */
487 /* insert character into string... */
488 if (bInsert
&& current
!= charcount
)
490 /* If this character insertion will cause screen scrolling,
491 * adjust the saved origin of the command prompt. */
492 tempscreen
= _tcslen(str
+ current
) + curx
;
493 if ((tempscreen
% maxx
) == (maxx
- 1) &&
494 (tempscreen
/ maxx
) + cury
== (maxy
- 1))
500 for (count
= charcount
; count
> current
; count
--)
501 str
[count
] = str
[count
- 1];
503 if (curx
== maxx
- 1)
507 ConOutPrintf (_T("%s"), &str
[current
- 1]);
508 SetCursorXY (curx
, cury
);
513 if (current
== charcount
)
516 if (GetCursorX () == maxx
- 1 && GetCursorY () == maxy
- 1)
518 if (GetCursorX () == maxx
- 1)
538 wLastKey
= ir
.Event
.KeyEvent
.wVirtualKeyCode
;
540 while (ir
.Event
.KeyEvent
.wVirtualKeyCode
!= VK_RETURN
);
542 SetCursorType (bInsert
, TRUE
);