usr/src/lib/libcurses/screen/wgetstr.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include        <sys/types.h>
  45 #include        "curses_inc.h"
  46
  47 #define         LENGTH  256
  48
  49 /* This routine gets a string starting at (_cury, _curx) */
  50
  51 int
  52 wgetstr(WINDOW *win, char *str)
  53 {
  54         return ((wgetnstr(win, str, LENGTH) == ERR) ? ERR : OK);
  55 }
  56
  57 int
  58 wgetnstr(WINDOW *win, char *str, int n)
  59 {
  60         int     cpos = 0, ch;
  61         int     nbyte = 0;
  62         int     tbyte = 0;
  63         int     byte[LENGTH];
  64         int     eucw, scrw;
  65         int     docont = 0;
  66         char    *cp = str;
  67         int     i = 0;
  68         int     total = 0;
  69         char    myerase, mykill;
  70         char    rownum[LENGTH], colnum[LENGTH], length[LENGTH];
  71         int     doecho = SP->fl_echoit;
  72         int     savecb = cur_term->_fl_rawmode;
  73         bool    savsync, savimmed, savleave;
  74
  75 #ifdef  DEBUG
  76         if (outf)
  77                 fprintf(outf, "doecho %d, savecb %d\n", doecho, savecb);
  78 #endif  /* DEBUG */
  79
  80         myerase = erasechar();
  81         mykill = killchar();
  82         if (!savecb)
  83                 (void) cbreak();
  84
  85         if (doecho) {
  86                 SP->fl_echoit = FALSE;
  87                 savsync = win->_sync;
  88                 savimmed = win->_immed;
  89                 savleave = win->_leave;
  90                 win->_immed = win->_sync = win->_leave = FALSE;
  91                 (void) wrefresh(win);
  92                 if (n > LENGTH)
  93                         n = LENGTH;
  94         }
  95         n--;
  96
  97         while (nbyte < n) {
  98                 if (doecho && !docont) {
  99                         rownum[cpos] = win->_cury;
 100                         colnum[cpos] = win->_curx;
 101                 }
 102
 103                 ch = wgetch(win);
 104                 if (docont)
 105                         goto cont;
 106
 107                 if ((ch == ERR) || (ch == '\n') || (ch == '\r') ||
 108                     (ch == KEY_ENTER))
 109                         break;
 110                 if ((ch == myerase) || (ch == KEY_LEFT) ||
 111                     (ch == KEY_BACKSPACE) || (ch == mykill)) {
 112                         if (cpos > 0) {
 113                                 if (ch == mykill) {
 114                                         i = total;
 115                                         total = cpos = 0;
 116                                         nbyte = 0;
 117                                         cp = str;
 118                                 } else {
 119                                         cpos--;
 120                                         cp -= byte[cpos];
 121                                         if (doecho)
 122                                                 total -= (i = length[cpos]);
 123                                 }
 124                                 if (doecho) {
 125                                         (void) wmove(win, rownum[cpos],
 126                                             colnum[cpos]);
 127                                         /* Add the correct amount of blanks. */
 128                                         for (; i > 0; i--)
 129                                                 (void) waddch(win, ' ');
 130                                         /* Move back after the blanks are */
 131                                         /* put in. */
 132                                         (void) wmove(win, rownum[cpos],
 133                                             colnum[cpos]);
 134                                         /* Update total. */
 135                                         (void) wrefresh(win);
 136                                 }
 137                         } else
 138                                 if (doecho)
 139                                         (void) beep();
 140                 } else if ((KEY_MIN <= ch) && (ch <= KEY_MAX))
 141                                 (void) beep();
 142                         else {
 143 cont:
 144                                 /* LINTED */
 145                                 *cp++ = (char)ch;
 146                                 if (docont) {
 147                                         tbyte++;
 148                                 } else if (ISMBIT(ch)) {
 149                                         docont = 1;
 150                                         tbyte = 1;
 151                                         scrw = mbscrw(ch);
 152                                         eucw = mbeucw(ch);
 153                                 }
 154
 155                                 if (docont && (tbyte >= eucw)) {
 156                                         docont = 0;
 157                                         tbyte = 0;
 158                                         if (doecho) {
 159                                                 byte[cpos] = eucw;
 160                                                 /* LINTED */
 161                                                 length[cpos] = (char)scrw;
 162                                                 (void) wechochar(win,
 163                                                     (chtype) ch);
 164                                         }
 165                                 } else if (doecho) {
 166                                         /* Add the length of the */
 167                                         /* character to total. */
 168                                         byte[cpos] = 1;
 169                                         if (ch >= ' ')
 170                                                 length[cpos] = 1;
 171                                         else
 172                                                 if (ch == '\t')
 173                                                         length[cpos] = TABSIZE-
 174                                                             (colnum[cpos] %
 175                                                             TABSIZE);
 176                                                 else
 177                                                         length[cpos] = 2;
 178                                         total += length[cpos];
 179                                         (void) wechochar(win, (chtype) ch);
 180                                 }
 181                                 if (!docont)
 182                                         cpos++;
 183                                 nbyte++;
 184                         }
 185         }
 186
 187         *cp = '\0';
 188
 189         if (!savecb)
 190                 (void) nocbreak();
 191         /*
 192          * The following code is equivalent to waddch(win, '\n')
 193          * except that it does not do a wclrtoeol.
 194          */
 195         if (doecho) {
 196                 SP->fl_echoit = TRUE;
 197                 win->_curx = 0;
 198                 if (win->_cury + 1 > win->_bmarg)
 199                         (void) wscrl(win, 1);
 200                 else
 201                         win->_cury++;
 202
 203                 win->_sync = savsync;
 204                 win->_immed = savimmed;
 205                 win->_leave = savleave;
 206                 (void) wrefresh(win);
 207         }
 208         return (ch);
 209 }