Properly get out of origin mode if the cursor has to move outside of it.

In some cases events may occur that move the cursor outside the
scrolling region while in origin mode, which is normally not possible.
Events like these include:

- Alignment test.
- Restore cursor.

Properly switch off origin mode in these cases.

MFC after:	1 month

1 files changed, 12 insertions, 3 deletions

diff --git a/sys/teken/teken_subr.h b/sys/teken/teken_subr.h
index 0332770..4c31065 100644
--- a/sys/teken/teken_subr.h
+++ b/sys/teken/teken_subr.h
@@ -185,11 +185,11 @@ teken_subr_alignment_test(teken_t *t)
 {
 	teken_rect_t tr;
 
+	t->t_cursor.tp_row = t->t_cursor.tp_col = 0;
 	t->t_scrollreg.ts_begin = 0;
 	t->t_scrollreg.ts_end = t->t_winsize.tp_row;
-
-	t->t_cursor.tp_row = t->t_cursor.tp_col = 0;
-	t->t_stateflags &= ~TS_WRAPPED;
+	t->t_originreg = t->t_scrollreg;
+	t->t_stateflags &= ~(TS_WRAPPED|TS_ORIGIN);
 	teken_funcs_cursor(t);
 
 	tr.tr_begin.tp_row = 0;
@@ -988,6 +988,15 @@ teken_subr_restore_cursor(teken_t *t)
 	t->t_curattr = t->t_saved_curattr;
 	t->t_scs[t->t_curscs] = t->t_saved_curscs;
 	t->t_stateflags &= ~TS_WRAPPED;
+
+	/* Get out of origin mode when the cursor is moved outside. */
+	if (t->t_cursor.tp_row < t->t_originreg.ts_begin ||
+	    t->t_cursor.tp_row >= t->t_originreg.ts_end) {
+		t->t_stateflags &= ~TS_ORIGIN;
+		t->t_originreg.ts_begin = 0;
+		t->t_originreg.ts_end = t->t_winsize.tp_row;
+	}
+
 	teken_funcs_cursor(t);
 }