Fix two dotline bugs for the price of one.

1) When answering "No newline at end of file, add one?" with y and
   dot is not at the end of buffer dotline is off by one
2) When displaying the same buffer in two windows, dot in the
   second window is below dot in the first and a newline is entered in
   the first window dotline is not updated in the second.

OK lum

1 files changed, 11 insertions, 5 deletions

diff --git a/usr.bin/mg/line.c b/usr.bin/mg/line.c
index 3b8ec8929b6..e67a2e55be1 100644
--- a/usr.bin/mg/line.c
+++ b/usr.bin/mg/line.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: line.c,v 1.51 2013/06/01 10:17:01 lum Exp $	*/
+/*	$OpenBSD: line.c,v 1.52 2013/12/23 21:47:32 florian Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -326,8 +326,8 @@ int
 lnewline_at(struct line *lp1, int doto)
 {
 	struct line	*lp2;
-	int	 nlen;
 	struct mgwin	*wp;
+	int	 	 nlen, tcurwpdotline;
 
 	lchange(WFFULL);
 
@@ -337,7 +337,8 @@ lnewline_at(struct line *lp1, int doto)
 	   (curwp->w_dotline == curwp->w_markline &&
 	    curwp->w_marko >= doto))
 		curwp->w_markline++;
-	curwp->w_dotline++;
+
+	tcurwpdotline = curwp->w_dotline;
 
 	/* If start of line, allocate a new line instead of copying */
 	if (doto == 0) {
@@ -348,9 +349,12 @@ lnewline_at(struct line *lp1, int doto)
 		lp1->l_bp->l_fp = lp2;
 		lp2->l_fp = lp1;
 		lp1->l_bp = lp2;
-		for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
+		for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
 			if (wp->w_linep == lp1)
 				wp->w_linep = lp2;
+			if (wp->w_dotline >= tcurwpdotline)
+				wp->w_dotline++;
+		}
 		undo_add_boundary(FFRAND, 1);
 		undo_add_insert(lp2, 0, 1);
 		undo_add_boundary(FFRAND, 1);
@@ -375,7 +379,9 @@ lnewline_at(struct line *lp1, int doto)
 		if (wp->w_dotp == lp1 && wp->w_doto >= doto) {
 			wp->w_dotp = lp2;
 			wp->w_doto -= doto;
-		}
+			wp->w_dotline++;
+		} else if (wp->w_dotline > tcurwpdotline)
+			wp->w_dotline++;
 		if (wp->w_markp == lp1 && wp->w_marko >= doto) {
 			wp->w_markp = lp2;
 			wp->w_marko -= doto;