1 /* $NetBSD: touchwin.c,v 1.26 2010/02/23 19:48:26 drochner 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 1.26 2010/02/23 19:48:26 drochner 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->alines[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 #ifdef DEBUG 66 __CTRACE(__CTRACE_LINE, "touchline: (%p, %d, %d)\n", win, start, count); 67 #endif 68 return wtouchln(win, start, count, 1); 69 } 70 71 /* 72 * wredrawln -- 73 * Mark count lines starting at start as corrupted. Implemented using 74 * wtouchln(). 75 */ 76 int wredrawln(WINDOW *win, int start, int count) 77 { 78 #ifdef DEBUG 79 __CTRACE(__CTRACE_LINE, "wredrawln: (%p, %d, %d)\n", win, start, count); 80 #endif 81 return wtouchln(win, start, count, 1); 82 } 83 84 /* 85 * is_wintouched -- 86 * Check if the window has been touched. 87 */ 88 bool 89 is_wintouched(WINDOW *win) 90 { 91 int y, maxy; 92 93 maxy = win->maxy; 94 for (y = 0; y < maxy; y++) { 95 if (is_linetouched(win, y) == TRUE) 96 return TRUE; 97 } 98 99 return FALSE; 100 } 101 102 /* 103 * touchwin -- 104 * Make it look like the whole window has been changed. 105 */ 106 int 107 touchwin(WINDOW *win) 108 { 109 #ifdef DEBUG 110 __CTRACE(__CTRACE_LINE, "touchwin: (%p)\n", win); 111 #endif 112 return wtouchln(win, 0, win->maxy, 1); 113 } 114 115 /* 116 * redrawwin -- 117 * Mark entire window as corrupted. Implemented using wtouchln(). 118 */ 119 int 120 redrawwin(WINDOW *win) 121 { 122 #ifdef DEBUG 123 __CTRACE(__CTRACE_LINE, "redrawwin: (%p)\n", win); 124 #endif 125 return wtouchln(win, 0, win->maxy, 1); 126 } 127 128 /* 129 * untouchwin -- 130 * Make it look like the window has not been changed. 131 */ 132 int 133 untouchwin(WINDOW *win) 134 { 135 #ifdef DEBUG 136 __CTRACE(__CTRACE_LINE, "untouchwin: (%p)\n", win); 137 #endif 138 return wtouchln(win, 0, win->maxy, 0); 139 } 140 141 /* 142 * wtouchln -- 143 * If changed is 1 then touch n lines starting at line. If changed 144 * is 0 then mark the lines as unchanged. 145 */ 146 int 147 wtouchln(WINDOW *win, int line, int n, int changed) 148 { 149 int y; 150 __LINE *wlp; 151 152 #ifdef DEBUG 153 __CTRACE(__CTRACE_LINE, "wtouchln: (%p) %d, %d, %d\n", 154 win, line, n, changed); 155 #endif 156 if (line + n > win->maxy) 157 line = win->maxy - n; 158 for (y = line; y < line + n; y++) { 159 if (changed == 1) 160 __touchline(win, y, 0, (int) win->maxx - 1); 161 else { 162 wlp = win->alines[y]; 163 if (*wlp->firstchp >= win->ch_off && 164 *wlp->firstchp < win->maxx + win->ch_off) 165 *wlp->firstchp = win->maxx + win->ch_off; 166 if (*wlp->lastchp >= win->ch_off && 167 *wlp->lastchp < win->maxx + win->ch_off) 168 *wlp->lastchp = win->ch_off; 169 wlp->flags &= ~__ISDIRTY; 170 } 171 } 172 173 return OK; 174 } 175 176 int 177 __touchwin(WINDOW *win) 178 { 179 int y, maxy; 180 181 #ifdef DEBUG 182 __CTRACE(__CTRACE_LINE, "__touchwin: (%p)\n", win); 183 #endif 184 maxy = win->maxy; 185 for (y = 0; y < maxy; y++) 186 __touchline(win, y, 0, (int) win->maxx - 1); 187 return (OK); 188 } 189 190 int 191 __touchline(WINDOW *win, int y, int sx, int ex) 192 { 193 #ifdef DEBUG 194 __CTRACE(__CTRACE_LINE, "__touchline: (%p, %d, %d, %d)\n", 195 win, y, sx, ex); 196 __CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n", 197 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 198 #endif 199 sx += win->ch_off; 200 ex += win->ch_off; 201 if (!(win->alines[y]->flags & __ISDIRTY)) 202 win->alines[y]->flags |= __ISDIRTY; 203 /* firstchp/lastchp are shared between parent window and sub-window. */ 204 if (*win->alines[y]->firstchp > sx) 205 *win->alines[y]->firstchp = sx; 206 if (*win->alines[y]->lastchp < ex) 207 *win->alines[y]->lastchp = ex; 208 #ifdef DEBUG 209 __CTRACE(__CTRACE_LINE, "__touchline: first = %d, last = %d\n", 210 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 211 #endif 212 return (OK); 213 } 214 215 void 216 wsyncup(WINDOW *win) 217 { 218 219 do { 220 touchwin(win); 221 win = win->orig; 222 } while (win); 223 } 224 225 void 226 wsyncdown(WINDOW *win) 227 { 228 WINDOW *w = win->orig; 229 230 while (w) { 231 if (is_wintouched(w)) { 232 touchwin(win); 233 break; 234 } 235 w = w->orig; 236 } 237 } 238