1/**************************************************************************** 2 * Copyright (c) 1998-2000,2002 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29/**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 ****************************************************************************/ 33 34/* 35** lib_getstr.c 36** 37** The routine wgetstr(). 38** 39*/ 40 41#include <curses.priv.h> 42#include <term.h> 43 44MODULE_ID("$Id: lib_getstr.c,v 1.24 2002/09/01 17:31:12 tom Exp $") 45 46/* 47 * This wipes out the last character, no matter whether it was a tab, control 48 * or other character, and handles reverse wraparound. 49 */ 50static char * 51WipeOut(WINDOW *win, int y, int x, char *first, char *last, bool echoed) 52{ 53 if (last > first) { 54 *--last = '\0'; 55 if (echoed) { 56 int y1 = win->_cury; 57 int x1 = win->_curx; 58 59 wmove(win, y, x); 60 waddstr(win, first); 61 getyx(win, y, x); 62 while (win->_cury < y1 63 || (win->_cury == y1 && win->_curx < x1)) 64 waddch(win, (chtype) ' '); 65 66 wmove(win, y, x); 67 } 68 } 69 return last; 70} 71 72NCURSES_EXPORT(int) 73wgetnstr_events(WINDOW *win, 74 char *str, 75 int maxlen, 76 EVENTLIST_1st(_nc_eventlist * evl)) 77{ 78 TTY buf; 79 bool oldnl, oldecho, oldraw, oldcbreak; 80 char erasec; 81 char killc; 82 char *oldstr; 83 int ch; 84 int y, x; 85 86 T((T_CALLED("wgetnstr(%p,%p, %d)"), win, str, maxlen)); 87 88 if (!win) 89 returnCode(ERR); 90 91 _nc_get_tty_mode(&buf); 92 93 oldnl = SP->_nl; 94 oldecho = SP->_echo; 95 oldraw = SP->_raw; 96 oldcbreak = SP->_cbreak; 97 nl(); 98 noecho(); 99 noraw(); 100 cbreak(); 101 102 erasec = erasechar(); 103 killc = killchar(); 104 105 oldstr = str; 106 getyx(win, y, x); 107 108 if (is_wintouched(win) || (win->_flags & _HASMOVED)) 109 wrefresh(win); 110 111 while ((ch = wgetch_events(win, evl)) != ERR) { 112 /* 113 * Some terminals (the Wyse-50 is the most common) generate 114 * a \n from the down-arrow key. With this logic, it's the 115 * user's choice whether to set kcud=\n for wgetch(); 116 * terminating *getstr() with \n should work either way. 117 */ 118 if (ch == '\n' 119 || ch == '\r' 120 || ch == KEY_DOWN 121 || ch == KEY_ENTER) { 122 if (oldecho == TRUE 123 && win->_cury == win->_maxy 124 && win->_scroll) 125 wechochar(win, (chtype) '\n'); 126 break; 127 } 128#ifdef KEY_EVENT 129 if (ch == KEY_EVENT) 130 break; 131#endif 132 if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) { 133 if (str > oldstr) { 134 str = WipeOut(win, y, x, oldstr, str, oldecho); 135 } 136 } else if (ch == killc) { 137 while (str > oldstr) { 138 str = WipeOut(win, y, x, oldstr, str, oldecho); 139 } 140 } else if (ch >= KEY_MIN 141 || (maxlen >= 0 && str - oldstr >= maxlen)) { 142 beep(); 143 } else { 144 *str++ = ch; 145 if (oldecho == TRUE) { 146 int oldy = win->_cury; 147 if (waddch(win, (chtype) ch) == ERR) { 148 /* 149 * We can't really use the lower-right 150 * corner for input, since it'll mess 151 * up bookkeeping for erases. 152 */ 153 win->_flags &= ~_WRAPPED; 154 waddch(win, (chtype) ' '); 155 str = WipeOut(win, y, x, oldstr, str, oldecho); 156 continue; 157 } else if (win->_flags & _WRAPPED) { 158 /* 159 * If the last waddch forced a wrap & 160 * scroll, adjust our reference point 161 * for erasures. 162 */ 163 if (win->_scroll 164 && oldy == win->_maxy 165 && win->_cury == win->_maxy) { 166 if (--y <= 0) { 167 y = 0; 168 } 169 } 170 win->_flags &= ~_WRAPPED; 171 } 172 wrefresh(win); 173 } 174 } 175 } 176 177 win->_curx = 0; 178 win->_flags &= ~_WRAPPED; 179 if (win->_cury < win->_maxy) 180 win->_cury++; 181 wrefresh(win); 182 183 /* Restore with a single I/O call, to fix minor asymmetry between 184 * raw/noraw, etc. 185 */ 186 SP->_nl = oldnl; 187 SP->_echo = oldecho; 188 SP->_raw = oldraw; 189 SP->_cbreak = oldcbreak; 190 191 _nc_set_tty_mode(&buf); 192 193 *str = '\0'; 194 if (ch == ERR) 195 returnCode(ch); 196#ifdef KEY_EVENT 197 if (ch == KEY_EVENT) 198 returnCode(ch); 199#endif 200 201 T(("wgetnstr returns %s", _nc_visbuf(oldstr))); 202 203 returnCode(OK); 204} 205 206#ifdef NCURSES_WGETCH_EVENTS 207NCURSES_EXPORT(int) 208wgetnstr(WINDOW *win, char *str, int maxlen) 209{ 210 returnCode(wgetnstr_events(win, 211 str, 212 maxlen, 213 EVENTLIST_1st((_nc_eventlist *) 0))); 214} 215#endif 216