1 /*- 2 * Copyright (c) 1988 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)terminal.h 4.3 (Berkeley) 4/26/91 34 */ 35 36 #define INCLUDED_TERMINAL 37 38 /* 39 * In the situation where we have a copy of the terminal screen in front 40 * of us, here are some macros to deal with them. 41 */ 42 43 #define TermAttributes(x) (TermIsStartField(x)? GetTerminal(x)&0xff : \ 44 GetTerminal(WhereTermAttrByte(x))&0xff) 45 #define TermIsStartField(x) ((GetTerminal(x)&ATTR_MASK) == ATTR_MASK) 46 #define TermNewField(p,a) SetTerminal(p, (a)|ATTR_MASK) 47 #define TermDeleteField(p) SetTerminal(p, 0) 48 #define TermIsNonDisplay(x) \ 49 ((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_NONDISPLAY) 50 #define TermIsHighlighted(x) \ 51 (((TermAttributes(x)&ATTR_DSPD_MASK) == ATTR_DSPD_HIGH) \ 52 && !TermIsStartField(x)) 53 54 #define TerminalCharacterAttr(c,p,a) (IsNonDisplayAttr(a) ? ' ':c) 55 #define TerminalCharacter(c,p) TerminalCharacterAttr(c,p,FieldAttributes(p)) 56 57 /* 58 * Is the screen formatted? Some algorithms change depending 59 * on whether there are any attribute bytes lying around. 60 */ 61 #define TerminalFormattedScreen() \ 62 ((WhereTermAttrByte(0) != 0) || ((GetTerminal(0)&ATTR_MASK) == ATTR_MASK)) 63 64 #define NeedToRedisplayFields(p) ((TermIsNonDisplay(p) != IsNonDisplay(p)) || \ 65 (TermIsHighlighted(p) != IsHighlighted(p))) 66 #define NeedToRedisplayFieldsAttr(p,c) ( \ 67 (TermIsNonDisplay(p) != IsNonDisplayAttr(c)) || \ 68 (TermIsHighlighted(p) != IsHighlightedAttr(c))) 69 70 #define NotVisuallyCompatibleAttributes(p,c,d) ( \ 71 (IsNonDisplayAttr(c) != IsNonDisplayAttr(d)) || \ 72 (IsHighlightedAttr(c) != IsHighlightedAttr(d))) 73 74 #define NeedToRedisplayAttr(c,p,a) \ 75 ((c != GetTerminal(p)) || NeedToRedisplayFieldsAttr(p,a)) 76 #define NeedToRedisplay(c,p) NeedToRedisplayAttr(c,p,FieldAttributes(p)) 77 78 79 #define GetTerminal(i) GetGeneric(i, Terminal) 80 #define GetTerminalPointer(p) GetGenericPointer(p) 81 #define SetTerminal(i,c) SetGeneric(i,c,Terminal) 82