usr/src/lib/libcurses/screen/quick_echo.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 extern  int     outchcount;
  48
  49 /*
  50  *  These routines short-circuit much of the innards of curses in order to get
  51  *  a single character output to the screen quickly! It is used by waddch().
  52  */
  53
  54 int
  55 _quick_echo(WINDOW *win, chtype ch)
  56 {
  57         short   y = win->_cury;
  58         short   SPy = y + win->_begy + win->_yoffset;
  59         short   SPx = (win->_curx - 1) + win->_begx;
  60         chtype  rawc = _CHAR(ch), rawattrs = _ATTR(ch);
  61
  62         if ((curscr->_flags & _CANT_BE_IMMED) ||
  63             (win->_flags & _WINCHANGED) ||
  64             (win->_clear) || (curscr->_clear) ||
  65             (_virtscr->_flags & _WINCHANGED) ||
  66             (SPy > ((LINES + SP->Yabove) - 1)) || (SPx > (COLS - 1)) ||
  67             (SP->slk && (SP->slk->_changed == TRUE))) {
  68                 win->_flags |= _WINCHANGED;
  69                 return (wrefresh(win));
  70         }
  71
  72         outchcount = 0;
  73         win->_firstch[y] = _INFINITY;
  74         win->_lastch[y] = -1;
  75         /* If the cursor is not in the right place, put it there! */
  76         if ((SPy != curscr->_cury) || (SPx != curscr->_curx)) {
  77                 (void) mvcur(curscr->_cury, curscr->_curx, SPy, SPx);
  78                 curscr->_cury = SPy;
  79         }
  80         curscr->_curx = SPx + 1;
  81         _CURHASH[SPy] = _NOHASH;
  82         if (ch != ' ') {
  83                 if (SPx > _ENDNS[SPy])
  84                         _ENDNS[SPy] = SPx;
  85                 if (SPx < _BEGNS[SPy])
  86                         _BEGNS[SPy] = SPx;
  87         }
  88         _virtscr->_y[SPy][SPx] = curscr->_y[SPy][SPx] = ch;
  89
  90         if (rawattrs != curscr->_attrs)
  91                 _VIDS(rawattrs, curscr->_attrs);
  92
  93         if (SP->phys_irm)
  94                 _OFFINSERT();
  95
  96         /* Write it out! */
  97         /* LINTED */
  98         (void) _outch((char) rawc);
  99         (void) fflush(SP->term_file);
 100
 101         return (outchcount);
 102 }