X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/861cd1ed8cc1cccf3803dcd1f404347b56689d57..d93758100f2a0e2107957c31450a3e9c6bf278b8:/usr/src/usr.bin/window/wwinschar.c

diff --git a/usr/src/usr.bin/window/wwinschar.c b/usr/src/usr.bin/window/wwinschar.c
index 5c82261cb9..715a2dabeb 100644
--- a/usr/src/usr.bin/window/wwinschar.c
+++ b/usr/src/usr.bin/window/wwinschar.c
@@ -1,85 +1,105 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
 #ifndef lint
-static	char *sccsid = "@(#)wwinschar.c	3.4 83/08/16";
-#endif
+static char sccsid[] = "@(#)wwinschar.c	3.18 (Berkeley) %G%";
+#endif /* not lint */
 
 #include "ww.h"
 #include "tt.h"
 
-wwinschar(w, line, col, c)
+wwinschar(w, row, col, c)
 register struct ww *w;
 short c;
 {
 	register i;
-	int row = line - w->ww_scroll;
 	int nvis;
 
+	/*
+	 * First, shift the line.
+	 */
 	{
 		register union ww_char *p, *q;
 
-		p = &w->ww_buf[line][w->ww_w.nc];
+		p = &w->ww_buf[row][w->ww_b.r];
 		q = p - 1;
-		for (i = w->ww_w.nc - col - 1; --i >= 0;)
+		for (i = w->ww_b.r - col; --i > 0;)
 			*--p = *--q;
 		q->c_w = c;
 	}
-	if (row < 0 || row >= w->ww_w.nr)
+
+	/*
+	 * If can't see it, just return.
+	 */
+	if (row < w->ww_i.t || row >= w->ww_i.b
+	    || w->ww_i.r <= 0 || w->ww_i.r <= col)
 		return;
+
+	if (col < w->ww_i.l)
+		col = w->ww_i.l;
+
+	/*
+	 * Now find out how much is actually changed, and fix wwns.
+	 */
 	{
 		register union ww_char *buf;
 		register char *win;
 		register union ww_char *ns;
 		register char *smap;
-		char *touched;
+		char touched;
 
 		nvis = 0;
-		smap = &wwsmap[row + w->ww_w.t][col + w->ww_w.l];
-		for (i = w->ww_w.nc - col; i > 0; i--)
-			if (*smap == w->ww_index)
-				break;
-			else {
-				smap++;
-				col++;
-			}
-		if (i <= 0)
+		smap = &wwsmap[row][col];
+		for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
+			;
+		if (i >= w->ww_i.r)
 			return;
-		buf = &w->ww_buf[line][col];
-		win = &w->ww_win[row][col];
-		ns = &wwns[row + w->ww_w.t][col + w->ww_w.l];
-		touched = &wwtouched[row + w->ww_w.t];
-		c = buf->c_w ^ *win << WWC_MSHIFT;
-		for (; --i >= 0;) {
-			if (*win) {
-				if ((*win & (WWM_COV|WWM_GLS)) != 0) {
-					ns++;
-					buf++;
-				} else {
-					*touched = 1;
-					ns++->c_w = buf++->c_w
-						^ *win++ << WWC_MSHIFT;
-				}
-			} else {
-				*touched = 1;
-				*ns++ = *buf++;
-				win++;
+		col = i;
+		buf = w->ww_buf[row];
+		win = w->ww_win[row];
+		ns = wwns[row];
+		smap = &wwsmap[row][i];
+		touched = wwtouched[row];
+		for (; i < w->ww_i.r; i++) {
+			if (*smap++ != w->ww_index)
+				continue;
+			touched |= WWU_TOUCHED;
+			if (win[i])
+				ns[i].c_w =
+					buf[i].c_w ^ win[i] << WWC_MSHIFT;
+			else {
 				nvis++;
+				ns[i] = buf[i];
 			}
 		}
+		wwtouched[row] = touched;
 	}
-	col += w->ww_w.l;
-	row += w->ww_w.t;
-	if (nvis > (wwncol - col) / 2) {
-		register union ww_char *p, *q;
 
-		(*tt.tt_setinsert)(1);
-		(*tt.tt_move)(row, col);
-		(*tt.tt_setmodes)(c >> WWC_MSHIFT);
-		(*tt.tt_putc)(c & WWC_CMASK);
-		(*tt.tt_setinsert)(0);
+	/*
+	 * Can/Should we use delete character?
+	 */
+	if ((tt.tt_inschar || tt.tt_setinsert) && nvis > (wwncol - col) / 2) {
+		register union ww_char *p, *q;
 
+		xxinschar(row, col, c & wwavailmodes << WWC_MSHIFT);
 		p = &wwos[row][wwncol];
 		q = p - 1;
-		for (i = wwncol - col - 1; --i >= 0;)
+		for (i = wwncol - col; --i > 0;)
 			*--p = *--q;
-		q->c_w = c;
+		q->c_w = tt.tt_setinsert ? c : ' ';
 	}
 }