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613 lines
16 KiB
C
613 lines
16 KiB
C
/*
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* CMDINPUT.C - handles command input (tab completion, history, etc.).
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*
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*
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* History:
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*
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* 01/14/95 (Tim Norman)
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* started.
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*
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* 08/08/95 (Matt Rains)
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* i have cleaned up the source code. changes now bring this source
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* into guidelines for recommended programming practice.
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* i have added some constants to help making changes easier.
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*
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* 12/12/95 (Tim Norman)
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* added findxy() function to get max x/y coordinates to display
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* correctly on larger screens
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*
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* 12/14/95 (Tim Norman)
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* fixed the Tab completion code that Matt Rains broke by moving local
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* variables to a more global scope and forgetting to initialize them
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* when needed
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*
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* 8/1/96 (Tim Norman)
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* fixed a bug in tab completion that caused filenames at the beginning
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* of the command-line to have their first letter truncated
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*
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* 9/1/96 (Tim Norman)
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* fixed a silly bug using printf instead of fputs, where typing "%i"
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* confused printf :)
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*
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* 6/14/97 (Steffan Kaiser)
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* ctrl-break checking
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*
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* 6/7/97 (Marc Desrochers)
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* recoded everything! now properly adjusts when text font is changed.
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* removed findxy(), reposition(), and reprint(), as these functions
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* were inefficient. added goxy() function as gotoxy() was buggy when
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* the screen font was changed. the printf() problem with %i on the
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* command line was fixed by doing printf("%s",str) instead of
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* printf(str). Don't ask how I find em just be glad I do :)
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*
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* 7/12/97 (Tim Norman)
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* Note: above changes pre-empted Steffan's ctrl-break checking.
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*
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* 7/7/97 (Marc Desrochers)
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* rewrote a new findxy() because the new dir() used it. This
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* findxy() simply returns the values of *maxx *maxy. In the
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* future, please use the pointers, they will always be correct
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* since they point to BIOS values.
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*
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* 7/8/97 (Marc Desrochers)
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* once again removed findxy(), moved the *maxx, *maxy pointers
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* global and included them as externs in command.h. Also added
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* insert/overstrike capability
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*
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* 7/13/97 (Tim Norman)
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* added different cursor appearance for insert/overstrike mode
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*
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* 7/13/97 (Tim Norman)
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* changed my code to use _setcursortype until I can figure out why
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* my code is crashing on some machines. It doesn't crash on mine :)
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*
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* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* added config.h include
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*
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* 28-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* put ifdef's around filename completion code.
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*
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* 30-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* moved filename completion code to filecomp.c
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* made second TAB display list of filename matches
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*
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* 31-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* Fixed bug where if you typed something, then hit HOME, then tried
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* to type something else in insert mode, it crashed.
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*
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* 07-Aug-1998 (John P Price <linux-guru@gcfl.net>)
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* Fixed carrage return output to better match MSDOS with echo
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* on or off.(marked with "JPP 19980708")
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*
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* 13-Dec-1998 (Eric Kohl)
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* Added insert/overwrite cursor.
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*
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* 25-Jan-1998 (Eric Kohl)
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* Replaced CRT io functions by Win32 console io functions.
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* This can handle <Shift>-<Tab> for 4NT filename completion.
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* Unicode and redirection safe!
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*
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* 04-Feb-1999 (Eric Kohl)
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* Fixed input bug. A "line feed" character remained in the keyboard
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* input queue when you pressed <RETURN>. This sometimes caused
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* some very strange effects.
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* Fixed some command line editing annoyances.
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*
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* 30-Apr-2004 (Filip Navara <xnavara@volny.cz>)
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* Fixed problems when the screen was scrolled away.
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*
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* 28-September-2007 (Herv<72> Poussineau)
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* Added history possibilities to right key.
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*/
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#include <precomp.h>
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SHORT maxx;
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SHORT maxy;
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/*
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* global command line insert/overwrite flag
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*/
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static BOOL bInsert = TRUE;
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static VOID
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ClearCommandLine (LPTSTR str, INT maxlen, SHORT orgx, SHORT orgy)
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{
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INT count;
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SetCursorXY (orgx, orgy);
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for (count = 0; count < (INT)_tcslen (str); count++)
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ConOutChar (_T(' '));
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_tcsnset (str, _T('\0'), maxlen);
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SetCursorXY (orgx, orgy);
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}
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/* read in a command line */
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BOOL ReadCommand (LPTSTR str, INT maxlen)
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{
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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SHORT orgx; /* origin x/y */
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SHORT orgy;
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SHORT curx; /*current x/y cursor position*/
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SHORT cury;
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SHORT tempscreen;
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INT count; /*used in some for loops*/
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INT current = 0; /*the position of the cursor in the string (str)*/
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INT charcount = 0;/*chars in the string (str)*/
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INPUT_RECORD ir;
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WORD wLastKey = 0;
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TCHAR ch;
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BOOL bContinue=FALSE;/*is TRUE the second case will not be executed*/
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BOOL bReturn = FALSE;
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BOOL bCharInput;
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#ifdef FEATURE_4NT_FILENAME_COMPLETION
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TCHAR szPath[MAX_PATH];
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#endif
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#ifdef FEATURE_HISTORY
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TCHAR PreviousChar;
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#endif
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if (!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
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{
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/* No console */
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HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE);
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DWORD dwRead;
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CHAR chr;
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do
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{
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if (!ReadFile(hStdin, &chr, 1, &dwRead, NULL) || !dwRead)
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return FALSE;
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#ifdef _UNICODE
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MultiByteToWideChar(InputCodePage, 0, &chr, 1, &str[charcount++], 1);
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#endif
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} while (chr != '\n' && charcount < maxlen);
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str[charcount] = _T('\0');
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return TRUE;
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}
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/* get screen size */
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maxx = csbi.dwSize.X;
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maxy = csbi.dwSize.Y;
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curx = orgx = csbi.dwCursorPosition.X;
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cury = orgy = csbi.dwCursorPosition.Y;
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memset (str, 0, maxlen * sizeof (TCHAR));
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SetCursorType (bInsert, TRUE);
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do
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{
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bReturn = FALSE;
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ConInKey (&ir);
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if (ir.Event.KeyEvent.dwControlKeyState &
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(RIGHT_ALT_PRESSED|LEFT_ALT_PRESSED|
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RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED) )
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{
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switch (ir.Event.KeyEvent.wVirtualKeyCode)
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{
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#ifdef FEATURE_HISTORY
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case 'K':
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/*add the current command line to the history*/
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if (ir.Event.KeyEvent.dwControlKeyState &
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(LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED))
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{
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if (str[0])
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History(0,str);
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ClearCommandLine (str, maxlen, orgx, orgy);
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current = charcount = 0;
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curx = orgx;
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cury = orgy;
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bContinue=TRUE;
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break;
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}
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case 'D':
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/*delete current history entry*/
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if (ir.Event.KeyEvent.dwControlKeyState &
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(LEFT_CTRL_PRESSED|RIGHT_CTRL_PRESSED))
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{
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ClearCommandLine (str, maxlen, orgx, orgy);
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History_del_current_entry(str);
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current = charcount = _tcslen (str);
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ConOutPrintf (_T("%s"), str);
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GetCursorXY (&curx, &cury);
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bContinue=TRUE;
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break;
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}
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#endif/*FEATURE_HISTORY*/
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}
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}
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bCharInput = FALSE;
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switch (ir.Event.KeyEvent.wVirtualKeyCode)
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{
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case VK_BACK:
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/* <BACKSPACE> - delete character to left of cursor */
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if (current > 0 && charcount > 0)
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{
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if (current == charcount)
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{
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/* if at end of line */
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str[current - 1] = _T('\0');
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if (GetCursorX () != 0)
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{
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ConOutPrintf (_T("\b \b"));
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curx--;
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}
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else
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{
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SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
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ConOutChar (_T(' '));
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SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
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cury--;
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curx = maxx - 1;
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}
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}
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else
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{
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for (count = current - 1; count < charcount; count++)
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str[count] = str[count + 1];
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if (GetCursorX () != 0)
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{
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SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ());
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curx--;
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}
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else
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{
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SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
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cury--;
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curx = maxx - 1;
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}
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GetCursorXY (&curx, &cury);
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ConOutPrintf (_T("%s "), &str[current - 1]);
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SetCursorXY (curx, cury);
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}
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charcount--;
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current--;
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}
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break;
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case VK_INSERT:
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/* toggle insert/overstrike mode */
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bInsert ^= TRUE;
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SetCursorType (bInsert, TRUE);
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break;
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case VK_DELETE:
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/* delete character under cursor */
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if (current != charcount && charcount > 0)
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{
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for (count = current; count < charcount; count++)
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str[count] = str[count + 1];
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charcount--;
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GetCursorXY (&curx, &cury);
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ConOutPrintf (_T("%s "), &str[current]);
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SetCursorXY (curx, cury);
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}
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break;
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case VK_HOME:
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/* goto beginning of string */
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if (current != 0)
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{
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SetCursorXY (orgx, orgy);
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curx = orgx;
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cury = orgy;
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current = 0;
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}
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break;
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case VK_END:
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/* goto end of string */
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if (current != charcount)
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{
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SetCursorXY (orgx, orgy);
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ConOutPrintf (_T("%s"), str);
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GetCursorXY (&curx, &cury);
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current = charcount;
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}
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break;
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case VK_TAB:
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#ifdef FEATURE_UNIX_FILENAME_COMPLETION
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/* expand current file name */
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if ((current == charcount) ||
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(current == charcount - 1 &&
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str[current] == _T('"'))) /* only works at end of line*/
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{
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if (wLastKey != VK_TAB)
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{
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/* if first TAB, complete filename*/
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tempscreen = charcount;
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CompleteFilename (str, charcount);
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charcount = _tcslen (str);
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current = charcount;
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SetCursorXY (orgx, orgy);
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ConOutPrintf (_T("%s"), str);
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if (tempscreen > charcount)
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{
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GetCursorXY (&curx, &cury);
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for (count = tempscreen - charcount; count--; )
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ConOutChar (_T(' '));
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SetCursorXY (curx, cury);
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}
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else
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{
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if (((charcount + orgx) / maxx) + orgy > maxy - 1)
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orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
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}
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/* set cursor position */
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SetCursorXY ((orgx + current) % maxx,
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orgy + (orgx + current) / maxx);
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GetCursorXY (&curx, &cury);
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}
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else
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{
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/*if second TAB, list matches*/
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if (ShowCompletionMatches (str, charcount))
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{
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PrintPrompt ();
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GetCursorXY (&orgx, &orgy);
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ConOutPrintf (_T("%s"), str);
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/* set cursor position */
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SetCursorXY ((orgx + current) % maxx,
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orgy + (orgx + current) / maxx);
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GetCursorXY (&curx, &cury);
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}
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}
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}
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else
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{
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MessageBeep (-1);
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}
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#endif
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#ifdef FEATURE_4NT_FILENAME_COMPLETION
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/* used to later see if we went down to the next line */
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tempscreen = charcount;
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szPath[0]=_T('\0');
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/* str is the whole things that is on the current line
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that is and and out. arg 2 is weather it goes back
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one file or forward one file */
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CompleteFilename(str, !(ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED), szPath, current);
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/* Attempt to clear the line */
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ClearCommandLine (str, maxlen, orgx, orgy);
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curx = orgx;
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cury = orgy;
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current = charcount = 0;
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/* Everything is deleted, lets add it back in */
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_tcscpy(str,szPath);
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/* Figure out where cusor is going to be after we print it */
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charcount = _tcslen (str);
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current = charcount;
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SetCursorXY (orgx, orgy);
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/* Print out what we have now */
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ConOutPrintf (_T("%s"), str);
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/* Move cursor accordingly */
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if(tempscreen > charcount)
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{
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GetCursorXY (&curx, &cury);
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for(count = tempscreen - charcount; count--; )
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ConOutChar (_T(' '));
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SetCursorXY (curx, cury);
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}
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else
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{
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if(((charcount + orgx) / maxx) + orgy > maxy - 1)
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orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
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}
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SetCursorXY((short)(((int)orgx + current) % maxx), (short)((int)orgy + ((int)orgx + current) / maxx));
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GetCursorXY(&curx, &cury);
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#endif
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break;
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case _T('M'):
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case _T('C'):
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/* ^M does the same as return */
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bCharInput = TRUE;
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if(!(ir.Event.KeyEvent.dwControlKeyState &
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(RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED)))
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{
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break;
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}
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case VK_RETURN:
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/* end input, return to main */
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#ifdef FEATURE_HISTORY
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/* add to the history */
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if (str[0])
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History (0, str);
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#endif
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str[charcount++] = _T('\n');
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str[charcount] = _T('\0');
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ConOutChar (_T('\n'));
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bReturn = TRUE;
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break;
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case VK_ESCAPE:
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/* clear str Make this callable! */
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ClearCommandLine (str, maxlen, orgx, orgy);
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curx = orgx;
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cury = orgy;
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current = charcount = 0;
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break;
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#ifdef FEATURE_HISTORY
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case VK_F3:
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History_move_to_bottom();
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#endif
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case VK_UP:
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#ifdef FEATURE_HISTORY
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/* get previous command from buffer */
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ClearCommandLine (str, maxlen, orgx, orgy);
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History (-1, str);
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current = charcount = _tcslen (str);
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if (((charcount + orgx) / maxx) + orgy > maxy - 1)
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orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
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ConOutPrintf (_T("%s"), str);
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GetCursorXY (&curx, &cury);
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#endif
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break;
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case VK_DOWN:
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#ifdef FEATURE_HISTORY
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/* get next command from buffer */
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ClearCommandLine (str, maxlen, orgx, orgy);
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History (1, str);
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current = charcount = _tcslen (str);
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if (((charcount + orgx) / maxx) + orgy > maxy - 1)
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orgy += maxy - ((charcount + orgx) / maxx + orgy + 1);
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ConOutPrintf (_T("%s"), str);
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GetCursorXY (&curx, &cury);
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#endif
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break;
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case VK_LEFT:
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/* move cursor left */
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if (current > 0)
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{
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current--;
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if (GetCursorX () == 0)
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{
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SetCursorXY ((SHORT)(maxx - 1), (SHORT)(GetCursorY () - 1));
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curx = maxx - 1;
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cury--;
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}
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else
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{
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SetCursorXY ((SHORT)(GetCursorX () - 1), GetCursorY ());
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curx--;
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}
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}
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else
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{
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MessageBeep (-1);
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}
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break;
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case VK_RIGHT:
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/* move cursor right */
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if (current != charcount)
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{
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current++;
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if (GetCursorX () == maxx - 1)
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{
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SetCursorXY (0, (SHORT)(GetCursorY () + 1));
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curx = 0;
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cury++;
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}
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else
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{
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SetCursorXY ((SHORT)(GetCursorX () + 1), GetCursorY ());
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curx++;
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}
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}
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#ifdef FEATURE_HISTORY
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else
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{
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LPCTSTR last = PeekHistory(-1);
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if (last && charcount < (INT)_tcslen (last))
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{
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PreviousChar = last[current];
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ConOutChar(PreviousChar);
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GetCursorXY(&curx, &cury);
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str[current++] = PreviousChar;
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charcount++;
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}
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}
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#endif
|
||
break;
|
||
|
||
default:
|
||
/* This input is just a normal char */
|
||
bCharInput = TRUE;
|
||
|
||
}
|
||
#ifdef _UNICODE
|
||
ch = ir.Event.KeyEvent.uChar.UnicodeChar;
|
||
if (ch >= 32 && (charcount != (maxlen - 2)) && bCharInput)
|
||
#else
|
||
ch = ir.Event.KeyEvent.uChar.AsciiChar;
|
||
if ((UCHAR)ch >= 32 && (charcount != (maxlen - 2)) && bCharInput)
|
||
#endif /* _UNICODE */
|
||
{
|
||
/* insert character into string... */
|
||
if (bInsert && current != charcount)
|
||
{
|
||
/* If this character insertion will cause screen scrolling,
|
||
* adjust the saved origin of the command prompt. */
|
||
tempscreen = _tcslen(str + current) + curx;
|
||
if ((tempscreen % maxx) == (maxx - 1) &&
|
||
(tempscreen / maxx) + cury == (maxy - 1))
|
||
{
|
||
orgy--;
|
||
cury--;
|
||
}
|
||
|
||
for (count = charcount; count > current; count--)
|
||
str[count] = str[count - 1];
|
||
str[current++] = ch;
|
||
if (curx == maxx - 1)
|
||
curx = 0, cury++;
|
||
else
|
||
curx++;
|
||
ConOutPrintf (_T("%s"), &str[current - 1]);
|
||
SetCursorXY (curx, cury);
|
||
charcount++;
|
||
}
|
||
else
|
||
{
|
||
if (current == charcount)
|
||
charcount++;
|
||
str[current++] = ch;
|
||
if (GetCursorX () == maxx - 1 && GetCursorY () == maxy - 1)
|
||
orgy--, cury--;
|
||
if (GetCursorX () == maxx - 1)
|
||
curx = 0, cury++;
|
||
else
|
||
curx++;
|
||
ConOutChar (ch);
|
||
}
|
||
}
|
||
|
||
wLastKey = ir.Event.KeyEvent.wVirtualKeyCode;
|
||
}
|
||
while (!bReturn);
|
||
|
||
SetCursorType (bInsert, TRUE);
|
||
|
||
#ifdef FEATURE_ALIASES
|
||
/* expand all aliases */
|
||
ExpandAlias (str, maxlen);
|
||
#endif /* FEATURE_ALIAS */
|
||
return TRUE;
|
||
}
|