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reactos/rosapps/cmd/cmdinput.c
Eric Kohl c2829c9869 Minor fixes. 
svn path=/trunk/; revision=685
1999-10-03 22:20:33 +00:00

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/*
* CMDINPUT.C - handles command input (tab completion, history, etc.).
*
*
* History:
*
* 01/14/95 (Tim Norman)
* started.
*
* 08/08/95 (Matt Rains)
* i have cleaned up the source code. changes now bring this source
* into guidelines for recommended programming practice.
* i have added some constants to help making changes easier.
*
* 12/12/95 (Tim Norman)
* added findxy() function to get max x/y coordinates to display
* correctly on larger screens
*
* 12/14/95 (Tim Norman)
* fixed the Tab completion code that Matt Rains broke by moving local
* variables to a more global scope and forgetting to initialize them
* when needed
*
* 8/1/96 (Tim Norman)
* fixed a bug in tab completion that caused filenames at the beginning
* of the command-line to have their first letter truncated
*
* 9/1/96 (Tim Norman)
* fixed a silly bug using printf instead of fputs, where typing "%i"
* confused printf :)
*
* 6/14/97 (Steffan Kaiser)
* ctrl-break checking
*
* 6/7/97 (Marc Desrochers)
* recoded everything! now properly adjusts when text font is changed.
* removed findxy(), reposition(), and reprint(), as these functions
* were inefficient. added goxy() function as gotoxy() was buggy when
* the screen font was changed. the printf() problem with %i on the
* command line was fixed by doing printf("%s",str) instead of
* printf(str). Don't ask how I find em just be glad I do :)
*
* 7/12/97 (Tim Norman)
* Note: above changes pre-empted Steffan's ctrl-break checking.
*
* 7/7/97 (Marc Desrochers)
* rewrote a new findxy() because the new dir() used it. This
* findxy() simply returns the values of *maxx *maxy. In the
* future, please use the pointers, they will always be correct
* since they point to BIOS values.
*
* 7/8/97 (Marc Desrochers)
* once again removed findxy(), moved the *maxx, *maxy pointers
* global and included them as externs in command.h. Also added
* insert/overstrike capability
*
* 7/13/97 (Tim Norman)
* added different cursor appearance for insert/overstrike mode
*
* 7/13/97 (Tim Norman)
* changed my code to use _setcursortype until I can figure out why
* my code is crashing on some machines. It doesn't crash on mine :)
*
* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* added config.h include
*
* 28-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* put ifdef's around filename completion code.
*
* 30-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* moved filename completion code to filecomp.c
* made second TAB display list of filename matches
*
* 31-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* Fixed bug where if you typed something, then hit HOME, then tried
* to type something else in insert mode, it crashed.
*
* 07-Aug-1998 (John P Price <linux-guru@gcfl.net>)
* Fixed carrage return output to better match MSDOS with echo
* on or off.(marked with "JPP 19980708")
*
* 13-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
* Added insert/overwrite cursor.
*
* 25-Jan-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
* Replaced CRT io functions by Win32 console io functions.
* This can handle <Shift>-<Tab> for 4NT filename completion.
* Unicode and redirection safe!
*
* 04-Feb-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
* Fixed input bug. A "line feed" character remained in the keyboard
* input queue when you pressed <RETURN>. This sometimes caused
* some very strange effects.
* Fixed some command line editing annoyances.
*/
#include "config.h"
#include <windows.h>
#include <tchar.h>
#include <string.h>
#include "cmd.h"
#include "batch.h"
SHORT maxx;
SHORT maxy;
/*
* global command line insert/overwrite flag
*/
static BOOL bInsert = TRUE;
static VOID
ClearCommandLine (LPTSTR str, INT maxlen, SHORT orgx, SHORT orgy)
{
INT count;
SetCursorXY (orgx, orgy);
for (count = 0; count < (INT)_tcslen (str); count++)
ConOutChar (_T(' '));
_tcsnset (str, _T('\0'), maxlen);
SetCursorXY (orgx, orgy);
}
/* read in a command line */
VOID ReadCommand (LPTSTR str, INT maxlen)
{
SHORT orgx; /* origin x/y */
SHORT orgy;
SHORT curx;
SHORT cury;
INT count;
INT current = 0;
INT charcount = 0;
INPUT_RECORD ir;
WORD wLastKey = 0;
TCHAR ch;
/* get screen size */
GetScreenSize (&maxx, &maxy);
/* JPP 19980807 - if echo off, don't print prompt */
if (bEcho)
PrintPrompt();
GetCursorXY (&orgx, &orgy);
memset (str, 0, maxlen * sizeof (TCHAR));
SetCursorType (bInsert, TRUE);
do
{
ConInKey (&ir);
switch (ir.Event.KeyEvent.wVirtualKeyCode)
{
case VK_BACK:
/* <BACKSPACE> - delete character to left of cursor */
if (current > 0 && charcount > 0)
{
if (current == charcount)
{
/* if at end of line */
str[current - 1] = _T('\0');
if (GetCursorX () != 0)
{
ConOutPrintf ("\b \b");
}
else
{
SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
ConOutChar (_T(' '));
SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
}
}
else
{
for (count = current - 1; count < charcount; count++)
str[count] = str[count + 1];
if (GetCursorX () != 0)
SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ());
else
SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
GetCursorXY (&curx, &cury);
ConOutPrintf (_T("%s "), &str[current - 1]);
SetCursorXY (curx, cury);
}
charcount--;
current--;
}
break;
case VK_INSERT:
/* toggle insert/overstrike mode */
bInsert ^= TRUE;
SetCursorType (bInsert, TRUE);
break;
case VK_DELETE:
/* delete character under cursor */
if (current != charcount && charcount > 0)
{
for (count = current; count < charcount; count++)
str[count] = str[count + 1];
charcount--;
GetCursorXY (&curx, &cury);
ConOutPrintf (_T("%s "), &str[current]);
SetCursorXY (curx, cury);
}
break;
case VK_HOME:
/* goto beginning of string */
if (current != 0)
{
SetCursorXY (orgx, orgy);
current = 0;
}
break;
case VK_END:
/* goto end of string */
if (current != charcount)
{
SetCursorXY (orgx, orgy);
ConOutPrintf (_T("%s"), str);
current = charcount;
}
break;
case VK_TAB:
#ifdef FEATURE_UNIX_FILENAME_COMPLETION
/* expand current file name */
if (current == charcount) // only works at end of line
{
if (wLastKey != VK_TAB)
{
// if first TAB, complete filename
CompleteFilename (str, charcount);
charcount = _tcslen (str);
current = charcount;
SetCursorXY (orgx, orgy);
ConOutPrintf (_T("%s"), str);
if ((_tcslen (str) > (USHORT)(maxx - orgx)) && (orgy == maxy + 1))
orgy--;
}
else
{
//if second TAB, list matches
if (ShowCompletionMatches (str, charcount))
{
PrintPrompt ();
GetCursorXY (&orgx, &orgy);
ConOutPrintf (_T("%s"), str);
}
}
}
else
{
#ifdef __REACTOS__
Beep (440, 50);
#else
MessageBeep (-1);
#endif
}
#endif
#ifdef FEATURE_4NT_FILENAME_COMPLETION
/* this is not implemented yet */
if (ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
{
/* get previous match */
}
else
{
/* get next match */
}
#endif
break;
case VK_RETURN:
/* end input, return to main */
#ifdef FEATURE_HISTORY
/* add to the history */
if (str[0])
History (0, str);
#endif
ConInDummy ();
ConOutChar (_T('\n'));
break;
case VK_ESCAPE:
/* clear str Make this callable! */
ClearCommandLine (str, maxlen, orgx, orgy);
current = charcount = 0;
break;
case VK_UP:
#ifdef FEATURE_HISTORY
/* get previous command from buffer */
ClearCommandLine (str, maxlen, orgx, orgy);
History (-1, str);
current = charcount = _tcslen (str);
ConOutPrintf (_T("%s"), str);
#endif
break;
case VK_DOWN:
#ifdef FEATURE_HISTORY
/* get next command from buffer */
ClearCommandLine (str, maxlen, orgx, orgy);
History (1, str);
current = charcount = _tcslen (str);
ConOutPrintf (_T("%s"), str);
#endif
break;
case VK_LEFT:
/* move cursor left */
if (current > 0)
{
current--;
if (GetCursorX () == 0)
SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
else
SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ());
}
else
{
#ifdef __REACTOS__
Beep (440, 50);
#else
MessageBeep (-1);
#endif
}
break;
case VK_RIGHT:
/* move cursor right */
if (current != charcount)
{
current++;
if (GetCursorX () == maxx - 1)
SetCursorXY (0, (SHORT)(GetCursorY () + 1));
else
SetCursorXY ((SHORT)(GetCursorX () + 1), GetCursorY ());
}
break;
default:
#ifdef _UNICODE
ch = ir.Event.KeyEvent.uChar.UnicodeChar;
if ((ch >= 32 && ch <= 255) && (charcount != (maxlen - 2)))
#else
ch = ir.Event.KeyEvent.uChar.AsciiChar;
if (ch >= 32 && (charcount != (maxlen - 2)))
#endif /* _UNICODE */
{
/* insert character into string... */
if (bInsert && current != charcount)
{
for (count = charcount; count > current; count--)
str[count] = str[count - 1];
str[current++] = ch;
if (GetCursorX () == maxx - 1)
{
curx = 0;
cury = GetCursorY () + 1;
}
else
{
GetCursorXY (&curx, &cury);
curx++;
}
ConOutPrintf (_T("%s"), &str[current - 1]);
if ((_tcslen (str) > (USHORT)(maxx - orgx)) && (orgy == maxy + 1))
cury--;
SetCursorXY (curx, cury);
charcount++;
}
else
{
if (current == charcount)
charcount++;
str[current++] = ch;
ConOutChar (ch);
}
if ((_tcslen (str) > (USHORT)(maxx - orgx)) && (orgy == maxy + 1))
orgy--;
}
#if 0
else
{
#ifdef __REACTOS__
Beep (440, 100);
#else
MessageBeep (-1);
#endif
}
#endif
break;
}
wLastKey = ir.Event.KeyEvent.wVirtualKeyCode;
}
while (ir.Event.KeyEvent.wVirtualKeyCode != VK_RETURN);
SetCursorType (bInsert, TRUE);
}
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