vt: fix double-click word selection for first/last word on line

Previously when double-clicking on the first word on a line we would
select from the cursor position to the end of the word, not from the
beginning of the line.  Similarly, when double-clicking on the last word
on a line we would select from the beginning of the word to the cursor
position rather than the end of the line.

This is because we searched backward or forward for a space character to
mark the beginning or end of a word.  Now, use the beginning or end of
the line if we do not find a space.

PR:		261553
Sponsored by:	The FreeBSD Foundation

(cherry picked from commit 692bb3f0291b21337eb9a778f71a5b97a47e4c11)
(cherry picked from commit 521dbfd6b1085511769c419d44f11842e92067f5)
(cherry picked from commit a861b27a45b0fc76bcb0dcf8ca53f1a831a13c2f)

1 files changed, 7 insertions, 0 deletions

diff --git a/sys/dev/vt/vt_buf.c b/sys/dev/vt/vt_buf.c
index be5d23b5d54d..bcc36a2e658f 100644
--- a/sys/dev/vt/vt_buf.c
+++ b/sys/dev/vt/vt_buf.c
@@ -786,12 +786,19 @@ vtbuf_set_mark(struct vt_buf *vb, int type, int col, int row)
 				break;
 			}
 		}
+		/* No space - word extends to beginning of line. */
+		if (i == -1)
+			vb->vb_mark_start.tp_col = 0;
 		for (i = col; i < vb->vb_scr_size.tp_col; i ++) {
 			if (TCHAR_CHARACTER(r[i]) == ' ') {
 				vb->vb_mark_end.tp_col = i;
 				break;
 			}
 		}
+		/* No space - word extends to end of line. */
+		if (i == vb->vb_scr_size.tp_col)
+			vb->vb_mark_end.tp_col = i;
+
 		if (vb->vb_mark_start.tp_col > vb->vb_mark_end.tp_col)
 			vb->vb_mark_start.tp_col = vb->vb_mark_end.tp_col;
 		break;