diff options
Diffstat (limited to 'ncurses-5.3/ncurses/base/lib_getstr.c')
| -rw-r--r-- | ncurses-5.3/ncurses/base/lib_getstr.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/base/lib_getstr.c b/ncurses-5.3/ncurses/base/lib_getstr.c new file mode 100644 index 0000000..9b7ea9a --- /dev/null +++ b/ncurses-5.3/ncurses/base/lib_getstr.c @@ -0,0 +1,215 @@ +/**************************************************************************** + * Copyright (c) 1998-2000,2002 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * + * and: Eric S. Raymond <esr@snark.thyrsus.com> * + ****************************************************************************/ + +/* +** lib_getstr.c +** +** The routine wgetstr(). +** +*/ + +#include <curses.priv.h> +#include <term.h> + +MODULE_ID("$Id$") + +/* + * This wipes out the last character, no matter whether it was a tab, control + * or other character, and handles reverse wraparound. + */ +static char * +WipeOut(WINDOW *win, int y, int x, char *first, char *last, bool echoed) +{ + if (last > first) { + *--last = '\0'; + if (echoed) { + int y1 = win->_cury; + int x1 = win->_curx; + + wmove(win, y, x); + waddstr(win, first); + 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) +wgetnstr_events(WINDOW *win, + char *str, + int maxlen, + EVENTLIST_1st(_nc_eventlist * evl)) +{ + TTY buf; + bool oldnl, oldecho, oldraw, oldcbreak; + char erasec; + char killc; + char *oldstr; + int ch; + int y, x; + + T((T_CALLED("wgetnstr(%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 = erasechar(); + killc = killchar(); + + oldstr = str; + getyx(win, y, x); + + if (is_wintouched(win) || (win->_flags & _HASMOVED)) + wrefresh(win); + + while ((ch = wgetch_events(win, evl)) != ERR) { + /* + * 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 wgetch(); + * terminating *getstr() with \n should work either way. + */ + if (ch == '\n' + || ch == '\r' + || ch == KEY_DOWN + || ch == KEY_ENTER) { + if (oldecho == TRUE + && win->_cury == win->_maxy + && win->_scroll) + wechochar(win, (chtype) '\n'); + break; + } +#ifdef KEY_EVENT + if (ch == KEY_EVENT) + break; +#endif + if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) { + if (str > oldstr) { + str = WipeOut(win, y, x, oldstr, str, oldecho); + } + } else if (ch == killc) { + while (str > oldstr) { + str = WipeOut(win, y, x, oldstr, str, oldecho); + } + } else if (ch >= KEY_MIN + || (maxlen >= 0 && str - oldstr >= maxlen)) { + beep(); + } else { + *str++ = ch; + if (oldecho == TRUE) { + int oldy = win->_cury; + if (waddch(win, (chtype) ch) == 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) ' '); + str = WipeOut(win, y, x, oldstr, str, 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; + + _nc_set_tty_mode(&buf); + + *str = '\0'; + if (ch == ERR) + returnCode(ch); +#ifdef KEY_EVENT + if (ch == KEY_EVENT) + returnCode(ch); +#endif + + T(("wgetnstr returns %s", _nc_visbuf(oldstr))); + + returnCode(OK); +} + +#ifdef NCURSES_WGETCH_EVENTS +NCURSES_EXPORT(int) +wgetnstr(WINDOW *win, char *str, int maxlen) +{ + returnCode(wgetnstr_events(win, + str, + maxlen, + EVENTLIST_1st((_nc_eventlist *) 0))); +} +#endif |