/* *  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 "cmd.h"SHORT maxx;SHORT maxy;/* * global command line insert/overwrite flag */static BOOL bInsert = TRUE;static VOIDClearCommandLine (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 */INT ReadCommand (LPTSTR str, INT maxlen){#ifdef RAWINPUT	SHORT orgx;			/* origin x/y */	SHORT orgy;	SHORT curx;			/*current x/y cursor position*/	SHORT cury;	INT   count;		/*used in some for loops*/	INT   current = 0;	/*the position of the cursor in the string (str)*/	INT   charcount = 0;/*chars in the string (str)*/	INPUT_RECORD ir;	WORD   wLastKey = 0;	TCHAR  ch;	BOOL bContinue=FALSE;/*is TRUE the second case will not be executed*/	/* 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);		//if (bContinue)		//	continue;		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 (_T("\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				{					MessageBeep (-1);				}#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 */				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:				break;			case VK_DOWN:				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				{					MessageBeep (-1);				}				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:				ch = ir.Event.KeyEvent.uChar.UnicodeChar;				if ((ch >= 32 && ch <= 255) && (charcount != (maxlen - 2)))				{					/* 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				{					MessageBeep (-1);				}#endif				break;		}		wLastKey = ir.Event.KeyEvent.wVirtualKeyCode;	}	while (ir.Event.KeyEvent.wVirtualKeyCode != VK_RETURN);	SetCursorType (bInsert, TRUE);#else	DWORD dwRead;	DWORD mode;	if (bEcho)		PrintPrompt();		GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &mode);	if(!ReadConsole(GetStdHandle(STD_INPUT_HANDLE),str ,maxlen, &dwRead,NULL) || GetLastError() == ERROR_OPERATION_ABORTED)	{		if(GetLastError() == ERROR_OPERATION_ABORTED)		{			SetLastError(ERROR_SUCCESS);			ConOutPrintf(_T("^C"));		}		return FALSE;	};	str[dwRead] = 0;	return TRUE;#endif}