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fix(messages): adjust msg_show "empty" kind logic (#37427)

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Problem:  A message ending in an unprintable character may emit a
          msg_show event with the "empty" kind. No empty message event
          for echom "".
Solution: Adjust conditions for emitting "empty" msg_show events.
This commit is contained in:
luukvbaal
2026-01-19 17:15:44 +01:00
committed by GitHub
parent 30259d6af7
commit 8bdfd286e5
2 changed files with 9 additions and 6 deletions
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8
src/nvim/message.c
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@@ -286,8 +286,10 @@ void msg_multiline(String str, int hl_id, bool check_int, bool hist, bool *need_
s++;
}
// Print the rest of the message
msg_outtrans_len(chunk, (int)(str.size - (size_t)(chunk - str.data)), hl_id, hist);
// Print the remainder or emit empty event if entire message is empty.
if (*chunk != NUL || chunk == str.data) {
msg_outtrans_len(chunk, (int)(str.size - (size_t)(chunk - str.data)), hl_id, hist);
}
}
// Avoid starting a new message for each chunk and adding message to history in msg_keep().
@@ -1748,7 +1750,7 @@ static void msg_home_replace_hl(const char *fname, int hl_id)
/// @return the number of characters it takes on the screen.
int msg_outtrans(const char *str, int hl_id, bool hist)
{
return *str == NUL ? 0 : msg_outtrans_len(str, (int)strlen(str), hl_id, hist);
return msg_outtrans_len(str, (int)strlen(str), hl_id, hist);
}
/// Output one character at "p".

7
test/functional/ui/messages_spec.lua
View File

@@ -502,8 +502,8 @@ describe('ui/ext_messages', function()
end,
})
-- Empty messages
feed(':echo "foo" | echo "" | lua print()<CR>')
-- 3 empty message events, not for an empty chunk after a non-printable character
feed(':echo "foo\\n" | echo "" | echom "" | lua print()<CR>')
screen:expect({
grid = [[
line 1 |
@@ -511,7 +511,8 @@ describe('ui/ext_messages', function()
{1:~ }|*3
]],
messages = {
{ content = { { 'foo' } }, kind = 'echo' },
{ content = { { 'foo\n' } }, kind = 'echo' },
{ content = {}, kind = 'empty' },
{ content = {}, kind = 'empty' },
{ content = {}, kind = 'empty' },
},