1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 * 12 * @(#)terminal.h 3.2 (Berkeley) 03/28/88 13 */ 14 15 #define INCLUDED_TERMINAL 16 17 /* 18 * In the situation where we have a copy of the terminal screen in front 19 * of us, here are some macros to deal with them. 20 */ 21 22 #define TermAttributes(x) (TermIsStartField(x)? GetTerminal(x)&0xff : \ 23 GetTerminal(WhereTermAttrByte(x))&0xff) 24 #define TermIsStartField(x) ((GetTerminal(x)&ATTR_MASK) == ATTR_MASK) 25 #define TermNewField(p,a) SetTerminal(p, (a)|ATTR_MASK) 26 #define TermDeleteField(p) SetTerminal(p, 0) 27 #define TermIsNonDisplay(x) \ 28 ((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY) 29 #define TermIsHighlighted(x) \ 30 (((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH) \ 31 && !TermIsStartField(x)) 32 33 #define TerminalCharacterAttr(c,p,a) (IsNonDisplayAttr(a) ? ' ':c) 34 #define TerminalCharacter(c,p) TerminalCharacterAttr(c,p,FieldAttributes(p)) 35 36 #define NeedToRedisplayFields(p) ((TermIsNonDisplay(p) != IsNonDisplay(p)) || \ 37 (TermIsHighlighted(p) != IsHighlighted(p))) 38 #define NeedToRedisplayFieldsAttr(p,c) ( \ 39 (TermIsNonDisplay(p) != IsNonDisplayAttr(c)) || \ 40 (TermIsHighlighted(p) != IsHighlightedAttr(c))) 41 42 #define NotVisuallyCompatibleAttributes(p,c,d) ( \ 43 (IsNonDisplayAttr(c) != IsNonDisplayAttr(d)) || \ 44 (IsHighlightedAttr(c) != IsHighlightedAttr(d))) 45 46 #define NeedToRedisplayAttr(c,p,a) \ 47 ((c != GetTerminal(p)) || NeedToRedisplayFieldsAttr(p,a)) 48 #define NeedToRedisplay(c,p) NeedToRedisplayAttr(c,p,FieldAttributes(p)) 49 50 51 #define GetTerminal(i) GetGeneric(i, Terminal) 52 #define GetTerminalPointer(p) GetGenericPointer(p) 53 #define SetTerminal(i,c) SetGeneric(i,c,Terminal) 54