vi: don't move cursor when yanking whole lines

When whole lines are yanked using 'yy' or 'Y' vi doesn't change the
cursor position.  Make BusyBox vi do the same.

function                                             old     new   delta
do_cmd                                              4776    4786     +10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 10/0)               Total: 10 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/editors/vi.c b/editors/vi.c
index d20481fbd..780c81234 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -3934,6 +3934,7 @@ static void do_cmd(int c)
 # endif
                 if (c == 'y' || c == 'Y')
                         yf = YANKONLY;
+                save_dot = dot;
 #endif
                 // determine range, and whether it spans lines
                 buftype = find_range(&p, &q, c);
@@ -3951,6 +3952,11 @@ static void do_cmd(int c)
                                 dot_begin();
                                 dot_skip_over_ws();
                         }
+#if ENABLE_FEATURE_VI_YANKMARK
+                        else /* (c == 'y' || c == 'Y') */ {
+                                dot = save_dot;
+                        }
+#endif
                 }
                 // if CHANGING, not deleting, start inserting after the delete
                 if (c == 'c') {