touchwin.c revision 1.21
1 /* $NetBSD: touchwin.c,v 1.21 2006/01/01 11:48:31 jdc Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. 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 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)touchwin.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: touchwin.c,v 1.21 2006/01/01 11:48:31 jdc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "curses.h" 42 #include "curses_private.h" 43 44 /* 45 * is_linetouched -- 46 * Indicate if line has been touched or not. 47 */ 48 bool 49 is_linetouched(WINDOW *win, int line) 50 { 51 if (line > win->maxy) 52 return FALSE; 53 54 return ((win->lines[line]->flags & __ISDIRTY) != 0); 55 } 56 57 /* 58 * touchline -- 59 * Touch count lines starting at start. This is the SUS v2 compliant 60 * version. 61 */ 62 int 63 touchline(WINDOW *win, int start, int count) 64 { 65 return wtouchln(win, start, count, 1); 66 } 67 68 /* 69 * wredrawln -- 70 * Mark count lines starting at start as corrupted. Implemented using 71 * wtouchln(). 72 */ 73 int wredrawln(WINDOW *win, int start, int count) 74 { 75 #ifdef DEBUG 76 __CTRACE("wredrawln: (%p, %d, %d)\n", win, start, count); 77 #endif 78 return wtouchln(win, start, count, 1); 79 } 80 81 /* 82 * is_wintouched -- 83 * Check if the window has been touched. 84 */ 85 bool 86 is_wintouched(WINDOW *win) 87 { 88 int y, maxy; 89 90 maxy = win->maxy; 91 for (y = 0; y < maxy; y++) { 92 if (is_linetouched(win, y) == TRUE) 93 return TRUE; 94 } 95 96 return FALSE; 97 } 98 99 /* 100 * touchwin -- 101 * Make it look like the whole window has been changed. 102 */ 103 int 104 touchwin(WINDOW *win) 105 { 106 #ifdef DEBUG 107 __CTRACE("touchwin: (%p)\n", win); 108 #endif 109 return wtouchln(win, 0, win->maxy, 1); 110 } 111 112 /* 113 * redrawwin -- 114 * Mark entire window as corrupted. Implemented using wtouchln(). 115 */ 116 int 117 redrawwin(WINDOW *win) 118 { 119 #ifdef DEBUG 120 __CTRACE("redrawwin: (%p)\n", win); 121 #endif 122 return wtouchln(win, 0, win->maxy, 1); 123 } 124 125 /* 126 * untouchwin -- 127 * Make it look like the window has not been changed. 128 */ 129 int 130 untouchwin(WINDOW *win) 131 { 132 return wtouchln(win, 0, win->maxy, 0); 133 } 134 135 /* 136 * wtouchln -- 137 * If changed is 1 then touch n lines starting at line. If changed 138 * is 0 then mark the lines as unchanged. 139 */ 140 int 141 wtouchln(WINDOW *win, int line, int n, int changed) 142 { 143 int y; 144 __LINE *wlp; 145 146 #ifdef DEBUG 147 __CTRACE("wtouchln: (%p) %d, %d, %d\n", win, line, n, changed); 148 #endif 149 if (line + n > win->maxy) 150 line = win->maxy - n; 151 for (y = line; y < line + n; y++) { 152 if (changed == 1) 153 __touchline(win, y, 0, (int) win->maxx - 1); 154 else { 155 wlp = win->lines[y]; 156 if (*wlp->firstchp >= win->ch_off && 157 *wlp->firstchp < win->maxx + win->ch_off) 158 *wlp->firstchp = win->maxx + win->ch_off; 159 if (*wlp->lastchp >= win->ch_off && 160 *wlp->lastchp < win->maxx + win->ch_off) 161 *wlp->lastchp = win->ch_off; 162 wlp->flags &= ~__ISDIRTY; 163 } 164 } 165 166 return OK; 167 } 168 169 170 int 171 __touchwin(WINDOW *win) 172 { 173 int y, maxy; 174 175 #ifdef DEBUG 176 __CTRACE("touchwin: (%p)\n", win); 177 #endif 178 maxy = win->maxy; 179 for (y = 0; y < maxy; y++) 180 __touchline(win, y, 0, (int) win->maxx - 1); 181 return (OK); 182 } 183 184 int 185 __touchline(WINDOW *win, int y, int sx, int ex) 186 { 187 #ifdef DEBUG 188 __CTRACE("touchline: (%p, %d, %d, %d)\n", win, y, sx, ex); 189 __CTRACE("touchline: first = %d, last = %d\n", 190 *win->lines[y]->firstchp, *win->lines[y]->lastchp); 191 #endif 192 sx += win->ch_off; 193 ex += win->ch_off; 194 if (!(win->lines[y]->flags & __ISDIRTY)) 195 win->lines[y]->flags |= __ISDIRTY; 196 /* firstchp/lastchp are shared between parent window and sub-window. */ 197 if (*win->lines[y]->firstchp > sx) 198 *win->lines[y]->firstchp = sx; 199 if (*win->lines[y]->lastchp < ex) 200 *win->lines[y]->lastchp = ex; 201 #ifdef DEBUG 202 __CTRACE("touchline: first = %d, last = %d\n", 203 *win->lines[y]->firstchp, *win->lines[y]->lastchp); 204 #endif 205 return (OK); 206 } 207
Indexes created Sat Sep 20 22:09:52 GMT 2025