[PING][PATCH v2] Fix multi-line strings in TuiWindow.write

[Simon Marchi]

On 2020-12-04 9:18 a.m., Hannes Domani via Gdb-patches wrote:
> Ping.
>
> Am Freitag, 20. November 2020, 01:01:43 MEZ hat Hannes Domani via Gdb-patches <gdb-patches@sourceware.org> Folgendes geschrieben:
>
>> Currently multi-line strings are all written to the first line.
>>
>> Since tui_copy_source_line sets the text variable to the start of the
>> next line, the check for newline has to be done with the previous character.
>>
>> gdb/ChangeLog:
>>
>> 2020-11-19  Hannes Domani  <ssbssa@yahoo.de>
>>
>>      * python/py-tui.c (tui_py_window::output): Fix multi-line strings.
>> ---
>> v2:
>> - Don't break multiple TuiWindow.write calls without newline characters.
>> ---
>> gdb/python/py-tui.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/gdb/python/py-tui.c b/gdb/python/py-tui.c
>> index 95c71f1d2d..306bd7b801 100644
>> --- a/gdb/python/py-tui.c
>> +++ b/gdb/python/py-tui.c
>> @@ -203,13 +203,13 @@ tui_py_window::output (const char *text)
>>      {
>>        wmove (handle.get (), cursor_y + 1, cursor_x + 1);
>>
>> +      const char *prev_text = text;
>>        std::string line = tui_copy_source_line (&text, 0, 0,
>>                            vwidth - cursor_x, 0);
>>        tui_puts (line.c_str (), handle.get ());
>>
>> -      if (*text == '\n')
>> +      if (text > prev_text && (text[-1] == '\n' || text[-1] == '\r'))
>>      {
>> -      ++text;
>>        ++cursor_y;
>>        cursor_x = 0;
>>      }
>> --
>> 2.29.2

I tried to apply this and give it a try (although I know nothing about
this code), and it looks like the patch is based on an old commit.  This
code was changed in September, quite a bit before your original patch:

https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=149830c137f351cb41888f87493cc42a72dbeac7;hp=5f278258ccae6a666c72de709a3171975fbaeb05

Can you see if the issue still exists in current master?  And if so, the
fix will have to be adapted to the new code.

Simon