patch 9.0.2074: Completion menu may be wrong
Problem: Completion menu may be wrong
Solution: Check for the original direction of the completion menu,
add more tests, make it work with 'noselect'
completion: move in right direction when filling completion_info()
When moving through the insert completion menu and switching directions,
we need to make sure we start at the correct position in the list and
move correctly forward/backwards through it, so that we do not skip
entries and the selected item points to the correct entry in the list
of completion entries generated by the completion_info() function.
The general case is this:
1) CTRL-X CTRL-N, we will traverse the list starting from
compl_first_match and then go forwards (using the cp->next pointer)
through the list (skipping the very first entry, which has the
CP_ORIGINAL_TEXT flag set (since that is the empty/non-selected entry
2) CTRL-X CTRL-P, we will traverse the list starting from
compl_first_match (which now points to the last entry). The previous
entry will have the CP_ORIGINAL_TEXT flag set, so we need to start
traversing the list from the second prev pointer.
There are in fact 2 special cases after starting the completion menu
with CTRL-X:
3) CTRL-N and then going backwards by pressing CTRL-P again.
compl_first_match will point to the same entry as in step 1 above,
but since compl_dir_foward() has been switched by pressing CTRL-P
to backwards we need to pretend to be in still in case 1 and still
traverse the list in forward direction using the cp_next pointer
4) CTRL-P and then going forwards by pressing CTRL-N again.
compl_first_match will point to the same entry as in step 2 above,
but since compl_dir_foward() has been switched by pressing CTRL-N
to forwards we need to pretend to be in still in case 2 and still
traverse the list in backward direction using the cp_prev pointer
For the 'noselect' case however, this is slightly different again. When
going backwards, we only need to go one cp_prev pointer back. And
resting of the direction works again slightly different. So we need to
take the noselect option into account when deciding in which direction
to iterate through the list of matches.
related: #13402
related: #12971
closes: #13408
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/insexpand.c b/src/insexpand.c
index ad4edc1..43fb8ca 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -3044,14 +3044,44 @@
info_add_completion_info(list_T *li)
{
compl_T *match;
+ int forward = compl_dir_forward();
if (compl_first_match == NULL)
return OK;
+ match = compl_first_match;
+ // There are four cases to consider here:
+ // 1) when just going forward through the menu,
+ // compl_first_match should point to the initial entry with
+ // number zero and CP_ORIGINAL_TEXT flag set
+ // 2) when just going backwards,
+ // compl-first_match should point to the last entry before
+ // the entry with the CP_ORIGINAL_TEXT flag set
+ // 3) when first going forwards and then backwards, e.g.
+ // pressing C-N, C-P, compl_first_match points to the
+ // last entry before the entry with the CP_ORIGINAL_TEXT
+ // flag set and next-entry moves opposite through the list
+ // compared to case 2, so pretend the direction is forward again
+ // 4) when first going backwards and then forwards, e.g.
+ // pressing C-P, C-N, compl_first_match points to the
+ // first entry with the CP_ORIGINAL_TEXT
+ // flag set and next-entry moves in opposite direction through the list
+ // compared to case 1, so pretend the direction is backwards again
+ //
+ // But only do this when the 'noselect' option is not active!
+
+ if (!compl_no_select)
+ {
+ if (forward && !match_at_original_text(match))
+ forward = FALSE;
+ else if (!forward && match_at_original_text(match))
+ forward = TRUE;
+ }
+
// Skip the element with the CP_ORIGINAL_TEXT flag at the beginning, in case of
// forward completion, or at the end, in case of backward completion.
- match = compl_dir_forward()
- ? compl_first_match->cp_next : compl_first_match->cp_prev->cp_prev;
+ match = forward ? match->cp_next : (compl_no_select ? match->cp_prev : match->cp_prev->cp_prev);
+
while (match != NULL && !match_at_original_text(match))
{
dict_T *di = dict_alloc();
@@ -3071,7 +3101,7 @@
else
dict_add_tv(di, "user_data", &match->cp_user_data);
- match = compl_dir_forward() ? match->cp_next : match->cp_prev;
+ match = forward ? match->cp_next : match->cp_prev;
}
return OK;