Fix two copy mode problems:

1. In vi mode the selection doesn't include the last character if you
   moved the cursor up or left.
2. In emacs mode the selection includes the last character if you moved
   the cursor to the left.

From Balazs Kezes.

1 files changed, 18 insertions, 5 deletions

diff --git a/screen.c b/screen.c
index 2b0e9fba..3e7d9924 100644
--- a/screen.c
+++ b/screen.c
@@ -276,6 +276,7 @@ int
 screen_check_selection(struct screen *s, u_int px, u_int py)
 {
 	struct screen_sel	*sel = &s->sel;
+	u_int			 xx;
 
 	if (!sel->flag)
 		return (0);
@@ -325,16 +326,24 @@ screen_check_selection(struct screen *s, u_int px, u_int py)
 			if (py < sel->sy || py > sel->ey)
 				return (0);
 
-			if ((py == sel->sy && px < sel->sx)
-			    || (py == sel->ey && px > sel->ex))
+			if (py == sel->sy && px < sel->sx)
+				return 0;
+
+			if (py == sel->ey && px > sel->ex)
 				return (0);
 		} else if (sel->sy > sel->ey) {
 			/* starting line > ending line -- upward selection. */
 			if (py > sel->sy || py < sel->ey)
 				return (0);
 
-			if ((py == sel->sy && px >= sel->sx)
-			    || (py == sel->ey && px < sel->ex))
+			if (py == sel->ey && px < sel->ex)
+				return (0);
+
+			if (sel->modekeys == MODEKEY_EMACS)
+				xx = sel->sx - 1;
+			else
+				xx = sel->sx;
+			if (py == sel->sy && px > xx)
 				return (0);
 		} else {
 			/* starting line == ending line. */
@@ -343,7 +352,11 @@ screen_check_selection(struct screen *s, u_int px, u_int py)
 
 			if (sel->ex < sel->sx) {
 				/* cursor (ex) is on the left */
-				if (px > sel->sx || px < sel->ex)
+				if (sel->modekeys == MODEKEY_EMACS)
+					xx = sel->sx - 1;
+				else
+					xx = sel->sx;
+				if (px > xx || px < sel->ex)
 					return (0);
 			} else {
 				/* selection start (sx) is on the left */