usr.bin/tn3270/sys_curses/terminal.h

   1 /*      $NetBSD: terminal.h,v 1.4 1998/03/04 13:16:09 christos Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1988 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      from: @(#)terminal.h    4.3 (Berkeley) 4/26/91
  32  */
  33
  34 #define INCLUDED_TERMINAL
  35
  36 /*
  37  * In the situation where we have a copy of the terminal screen in front
  38  * of us, here are some macros to deal with them.
  39  */
  40
  41 #define TermAttributes(x)       (TermIsStartField(x)? GetTerminal(x)&0xff : \
  42                                     GetTerminal(WhereTermAttrByte(x))&0xff)
  43 #define TermIsStartField(x)     ((GetTerminal(x)&ATTR_MASK) == ATTR_MASK)
  44 #define TermNewField(p,a)       SetTerminal(p, (a)|ATTR_MASK)
  45 #define TermDeleteField(p)      SetTerminal(p, 0)
  46 #define TermIsNonDisplay(x)     \
  47                     ((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY)
  48 #define TermIsHighlighted(x) \
  49                 (((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH) \
  50                                     && !TermIsStartField(x))
  51
  52 #define TerminalCharacterAttr(c,p,a)    (IsNonDisplayAttr(a) ? ' ':c)
  53 #define TerminalCharacter(c,p)  TerminalCharacterAttr(c,p,FieldAttributes(p))
  54
  55         /*
  56          * Is the screen formatted?  Some algorithms change depending
  57          * on whether there are any attribute bytes lying around.
  58          */
  59 #define TerminalFormattedScreen() \
  60             ((WhereTermAttrByte(0) != 0) || ((GetTerminal(0)&ATTR_MASK) == ATTR_MASK))
  61
  62 #define NeedToRedisplayFields(p) ((TermIsNonDisplay(p) != IsNonDisplay(p)) || \
  63                                 (TermIsHighlighted(p) != IsHighlighted(p)))
  64 #define NeedToRedisplayFieldsAttr(p,c) ( \
  65                         (TermIsNonDisplay(p) != IsNonDisplayAttr(c)) || \
  66                         (TermIsHighlighted(p) != IsHighlightedAttr(c)))
  67
  68 #define NotVisuallyCompatibleAttributes(p,c,d) ( \
  69                         (IsNonDisplayAttr(c) != IsNonDisplayAttr(d)) || \
  70                         (IsHighlightedAttr(c) != IsHighlightedAttr(d)))
  71
  72 #define NeedToRedisplayAttr(c,p,a) \
  73                         ((c != GetTerminal(p)) || NeedToRedisplayFieldsAttr(p,a))
  74 #define NeedToRedisplay(c,p)    NeedToRedisplayAttr(c,p,FieldAttributes(p))
  75
  76
  77 #define GetTerminal(i)          GetGeneric(i, Terminal)
  78 #define GetTerminalPointer(p)   GetGenericPointer(p)
  79 #define SetTerminal(i,c)        SetGeneric(i,c,Terminal)