| /**************************************************************************** |
| * Copyright (c) 2002-2004,2008 Free Software Foundation, Inc. * |
| * * |
| * Permission is hereby granted, free of charge, to any person obtaining a * |
| * copy of this software and associated documentation files (the * |
| * "Software"), to deal in the Software without restriction, including * |
| * without limitation the rights to use, copy, modify, merge, publish, * |
| * distribute, distribute with modifications, sublicense, and/or sell * |
| * copies of the Software, and to permit persons to whom the Software is * |
| * furnished to do so, subject to the following conditions: * |
| * * |
| * The above copyright notice and this permission notice shall be included * |
| * in all copies or substantial portions of the Software. * |
| * * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
| * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| * * |
| * Except as contained in this notice, the name(s) of the above copyright * |
| * holders shall not be used in advertising or otherwise to promote the * |
| * sale, use or other dealings in this Software without prior written * |
| * authorization. * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Author: Thomas E. Dickey * |
| ****************************************************************************/ |
| |
| /* |
| ** lib_get_wstr.c |
| ** |
| ** The routine wgetn_wstr(). |
| ** |
| */ |
| |
| #include <curses.priv.h> |
| #include <term.h> |
| |
| MODULE_ID("$Id: lib_get_wstr.c,v 1.10 2008/08/16 19:25:33 tom Exp $") |
| |
| static int |
| wadd_wint(WINDOW *win, wint_t *src) |
| { |
| cchar_t tmp; |
| wchar_t wch[2]; |
| |
| wch[0] = (wchar_t) (*src); |
| wch[1] = 0; |
| setcchar(&tmp, wch, A_NORMAL, 0, NULL); |
| return wadd_wch(win, &tmp); |
| } |
| |
| /* |
| * This wipes out the last character, no matter whether it was a tab, control |
| * or other character, and handles reverse wraparound. |
| */ |
| static wint_t * |
| WipeOut(WINDOW *win, int y, int x, wint_t *first, wint_t *last, bool echoed) |
| { |
| if (last > first) { |
| *--last = '\0'; |
| if (echoed) { |
| int y1 = win->_cury; |
| int x1 = win->_curx; |
| int n; |
| |
| wmove(win, y, x); |
| for (n = 0; first[n] != 0; ++n) { |
| wadd_wint(win, first + n); |
| } |
| getyx(win, y, x); |
| while (win->_cury < y1 |
| || (win->_cury == y1 && win->_curx < x1)) |
| waddch(win, (chtype) ' '); |
| |
| wmove(win, y, x); |
| } |
| } |
| return last; |
| } |
| |
| NCURSES_EXPORT(int) |
| wgetn_wstr(WINDOW *win, wint_t *str, int maxlen) |
| { |
| SCREEN *sp = _nc_screen_of(win); |
| TTY buf; |
| bool oldnl, oldecho, oldraw, oldcbreak; |
| wint_t erasec; |
| wint_t killc; |
| wint_t *oldstr = str; |
| wint_t *tmpstr = str; |
| wint_t ch; |
| int y, x, code; |
| |
| T((T_CALLED("wgetn_wstr(%p,%p, %d)"), win, str, maxlen)); |
| |
| if (!win) |
| returnCode(ERR); |
| |
| _nc_get_tty_mode(&buf); |
| |
| oldnl = sp->_nl; |
| oldecho = sp->_echo; |
| oldraw = sp->_raw; |
| oldcbreak = sp->_cbreak; |
| nl(); |
| noecho(); |
| noraw(); |
| cbreak(); |
| |
| erasec = (wint_t) erasechar(); |
| killc = (wint_t) killchar(); |
| |
| getyx(win, y, x); |
| |
| if (is_wintouched(win) || (win->_flags & _HASMOVED)) |
| wrefresh(win); |
| |
| while ((code = wget_wch(win, &ch)) != ERR) { |
| /* |
| * Map special characters into key-codes. |
| */ |
| if (ch == '\r') |
| ch = '\n'; |
| if (ch == '\n') { |
| code = KEY_CODE_YES; |
| ch = KEY_ENTER; |
| } |
| if (ch < KEY_MIN) { |
| if (ch == erasec) { |
| ch = KEY_BACKSPACE; |
| code = KEY_CODE_YES; |
| } |
| if (ch == killc) { |
| ch = KEY_EOL; |
| code = KEY_CODE_YES; |
| } |
| } |
| if (code == KEY_CODE_YES) { |
| /* |
| * Some terminals (the Wyse-50 is the most common) generate a \n |
| * from the down-arrow key. With this logic, it's the user's |
| * choice whether to set kcud=\n for wget_wch(); terminating |
| * *getn_wstr() with \n should work either way. |
| */ |
| if (ch == KEY_DOWN || ch == KEY_ENTER) { |
| if (oldecho == TRUE |
| && win->_cury == win->_maxy |
| && win->_scroll) |
| wechochar(win, (chtype) '\n'); |
| break; |
| } |
| if (ch == KEY_LEFT || ch == KEY_BACKSPACE) { |
| if (tmpstr > oldstr) { |
| tmpstr = WipeOut(win, y, x, oldstr, tmpstr, oldecho); |
| } |
| } else if (ch == KEY_EOL) { |
| while (tmpstr > oldstr) { |
| tmpstr = WipeOut(win, y, x, oldstr, tmpstr, oldecho); |
| } |
| } else { |
| beep(); |
| } |
| } else if (maxlen >= 0 && tmpstr - oldstr >= maxlen) { |
| beep(); |
| } else { |
| *tmpstr++ = ch; |
| *tmpstr = 0; |
| if (oldecho == TRUE) { |
| int oldy = win->_cury; |
| |
| if (wadd_wint(win, tmpstr - 1) == ERR) { |
| /* |
| * We can't really use the lower-right corner for input, |
| * since it'll mess up bookkeeping for erases. |
| */ |
| win->_flags &= ~_WRAPPED; |
| waddch(win, (chtype) ' '); |
| tmpstr = WipeOut(win, y, x, oldstr, tmpstr, oldecho); |
| continue; |
| } else if (win->_flags & _WRAPPED) { |
| /* |
| * If the last waddch forced a wrap & scroll, adjust our |
| * reference point for erasures. |
| */ |
| if (win->_scroll |
| && oldy == win->_maxy |
| && win->_cury == win->_maxy) { |
| if (--y <= 0) { |
| y = 0; |
| } |
| } |
| win->_flags &= ~_WRAPPED; |
| } |
| wrefresh(win); |
| } |
| } |
| } |
| |
| win->_curx = 0; |
| win->_flags &= ~_WRAPPED; |
| if (win->_cury < win->_maxy) |
| win->_cury++; |
| wrefresh(win); |
| |
| /* Restore with a single I/O call, to fix minor asymmetry between |
| * raw/noraw, etc. |
| */ |
| sp->_nl = oldnl; |
| sp->_echo = oldecho; |
| sp->_raw = oldraw; |
| sp->_cbreak = oldcbreak; |
| |
| (void) _nc_set_tty_mode(&buf); |
| |
| *tmpstr = 0; |
| if (code == ERR) { |
| if (tmpstr == oldstr) { |
| *tmpstr++ = WEOF; |
| *tmpstr = 0; |
| } |
| returnCode(ERR); |
| } |
| |
| T(("wgetn_wstr returns %s", _nc_viswibuf(oldstr))); |
| |
| returnCode(OK); |
| } |
