1 /* $NetBSD: wwinschar.c,v 1.7 2003/08/07 11:17:40 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Edward Wang at The University of California, Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwinschar.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwinschar.c,v 1.7 2003/08/07 11:17:40 agc Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include "ww.h" 45 #include "tt.h" 46 #include "xx.h" 47 48 void 49 wwinschar(struct ww *w, int row, int col, char c, char m) 50 { 51 int i; 52 int nvis; 53 short x = c | m << WWC_MSHIFT; 54 55 /* 56 * First, shift the line. 57 */ 58 { 59 union ww_char *p, *q; 60 61 p = &w->ww_buf[row][w->ww_b.r]; 62 q = p - 1; 63 for (i = w->ww_b.r - col; --i > 0;) 64 *--p = *--q; 65 q->c_w = x; 66 } 67 68 /* 69 * If can't see it, just return. 70 */ 71 if (row < w->ww_i.t || row >= w->ww_i.b 72 || w->ww_i.r <= 0 || w->ww_i.r <= col) 73 return; 74 75 if (col < w->ww_i.l) 76 col = w->ww_i.l; 77 78 /* 79 * Now find out how much is actually changed, and fix wwns. 80 */ 81 { 82 union ww_char *buf; 83 char *win; 84 union ww_char *ns; 85 unsigned char *smap; 86 char touched; 87 88 nvis = 0; 89 smap = &wwsmap[row][col]; 90 for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) 91 ; 92 if (i >= w->ww_i.r) 93 return; 94 col = i; 95 buf = w->ww_buf[row]; 96 win = w->ww_win[row]; 97 ns = wwns[row]; 98 smap = &wwsmap[row][i]; 99 touched = wwtouched[row]; 100 for (; i < w->ww_i.r; i++) { 101 if (*smap++ != w->ww_index) 102 continue; 103 touched |= WWU_TOUCHED; 104 if (win[i]) 105 ns[i].c_w = 106 buf[i].c_w ^ win[i] << WWC_MSHIFT; 107 else { 108 nvis++; 109 ns[i] = buf[i]; 110 } 111 } 112 wwtouched[row] = touched; 113 } 114 115 /* 116 * Can/Should we use delete character? 117 */ 118 if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) { 119 union ww_char *p, *q; 120 121 if (tt.tt_inschar) 122 xxinschar(row, col, c, m); 123 else { 124 xxinsspace(row, col); 125 x = ' '; 126 } 127 p = &wwos[row][wwncol]; 128 q = p - 1; 129 for (i = wwncol - col; --i > 0;) 130 *--p = *--q; 131 q->c_w = x; 132 } 133 } 134