1 /**************************************************************************** 2 * Copyright (c) 1998-2006,2008 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 44 MODULE_ID("$Id: lib_getstr.c,v 1.27 2008/08/16 19:20:04 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 */ 50 static char * 51 WipeOut(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 72 NCURSES_EXPORT(int) 73 wgetnstr_events(WINDOW *win, 74 char *str, 75 int maxlen, 76 EVENTLIST_1st(_nc_eventlist * evl)) 77 { 78 SCREEN *sp = _nc_screen_of(win); 79 TTY buf; 80 bool oldnl, oldecho, oldraw, oldcbreak; 81 char erasec; 82 char killc; 83 char *oldstr; 84 int ch; 85 int y, x; 86 87 T((T_CALLED("wgetnstr(%p,%p, %d)"), win, str, maxlen)); 88 89 if (!win) 90 returnCode(ERR); 91 92 _nc_get_tty_mode(&buf); 93 94 oldnl = sp->_nl; 95 oldecho = sp->_echo; 96 oldraw = sp->_raw; 97 oldcbreak = sp->_cbreak; 98 nl(); 99 noecho(); 100 noraw(); 101 cbreak(); 102 103 erasec = erasechar(); 104 killc = killchar(); 105 106 oldstr = str; 107 getyx(win, y, x); 108 109 if (is_wintouched(win) || (win->_flags & _HASMOVED)) 110 wrefresh(win); 111 112 while ((ch = wgetch_events(win, evl)) != ERR) { 113 /* 114 * Some terminals (the Wyse-50 is the most common) generate 115 * a \n from the down-arrow key. With this logic, it's the 116 * user's choice whether to set kcud=\n for wgetch(); 117 * terminating *getstr() with \n should work either way. 118 */ 119 if (ch == '\n' 120 || ch == '\r' 121 || ch == KEY_DOWN 122 || ch == KEY_ENTER) { 123 if (oldecho == TRUE 124 && win->_cury == win->_maxy 125 && win->_scroll) 126 wechochar(win, (chtype) '\n'); 127 break; 128 } 129 #ifdef KEY_EVENT 130 if (ch == KEY_EVENT) 131 break; 132 #endif 133 #ifdef KEY_RESIZE 134 if (ch == KEY_RESIZE) 135 break; 136 #endif 137 if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) { 138 if (str > oldstr) { 139 str = WipeOut(win, y, x, oldstr, str, oldecho); 140 } 141 } else if (ch == killc) { 142 while (str > oldstr) { 143 str = WipeOut(win, y, x, oldstr, str, oldecho); 144 } 145 } else if (ch >= KEY_MIN 146 || (maxlen >= 0 && str - oldstr >= maxlen)) { 147 beep(); 148 } else { 149 *str++ = (char) ch; 150 if (oldecho == TRUE) { 151 int oldy = win->_cury; 152 if (waddch(win, (chtype) ch) == ERR) { 153 /* 154 * We can't really use the lower-right 155 * corner for input, since it'll mess 156 * up bookkeeping for erases. 157 */ 158 win->_flags &= ~_WRAPPED; 159 waddch(win, (chtype) ' '); 160 str = WipeOut(win, y, x, oldstr, str, oldecho); 161 continue; 162 } else if (win->_flags & _WRAPPED) { 163 /* 164 * If the last waddch forced a wrap & 165 * scroll, adjust our reference point 166 * for erasures. 167 */ 168 if (win->_scroll 169 && oldy == win->_maxy 170 && win->_cury == win->_maxy) { 171 if (--y <= 0) { 172 y = 0; 173 } 174 } 175 win->_flags &= ~_WRAPPED; 176 } 177 wrefresh(win); 178 } 179 } 180 } 181 182 win->_curx = 0; 183 win->_flags &= ~_WRAPPED; 184 if (win->_cury < win->_maxy) 185 win->_cury++; 186 wrefresh(win); 187 188 /* Restore with a single I/O call, to fix minor asymmetry between 189 * raw/noraw, etc. 190 */ 191 sp->_nl = oldnl; 192 sp->_echo = oldecho; 193 sp->_raw = oldraw; 194 sp->_cbreak = oldcbreak; 195 196 _nc_set_tty_mode(&buf); 197 198 *str = '\0'; 199 if (ch == ERR) 200 returnCode(ch); 201 202 T(("wgetnstr returns %s", _nc_visbuf(oldstr))); 203 204 #ifdef KEY_EVENT 205 if (ch == KEY_EVENT) 206 returnCode(ch); 207 #endif 208 #ifdef KEY_RESIZE 209 if (ch == KEY_RESIZE) 210 returnCode(ch); 211 #endif 212 213 returnCode(OK); 214 } 215 216 #ifdef NCURSES_WGETCH_EVENTS 217 NCURSES_EXPORT(int) 218 wgetnstr(WINDOW *win, char *str, int maxlen) 219 { 220 returnCode(wgetnstr_events(win, 221 str, 222 maxlen, 223 EVENTLIST_1st((_nc_eventlist *) 0))); 224 } 225 #endif 226