[Octave-bug-tracker] [bug #39728] GUI command history incompatible with history_control

[Mike Miller]

URL:
  <http://savannah.gnu.org/bugs/?39728>

                 Summary: GUI command history incompatible with
history_control
                 Project: GNU Octave
            Submitted by: mtmiller
            Submitted on: Thu 08 Aug 2013 08:00:01 AM EDT
                Category: GUI
                Severity: 2 - Minor
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

If history_control is set to "ignorespace", "ignoredups", "ignoreboth", or
"erasedups", the GUI command history panel still shows every entry typed in
the command window. When Octave exits and restarts, the command history panel
shows the correct history. I suppose this is because every command is sent to
the GUI on a separate channel from how readline records and saves history. The
following example session should show the bug:


>> history_control ("ignorespace")
>>  x = 5;
>> x = 5;
>> # up-arrow twice to show correct history, then Ctrl-C
>> history_control ("ignoredups")
>> x = 5;
>> x = 5;
>> x = 5;
>> # up-arrow twice to show correct history, then Ctrl-C
>> history_control ("ignoreboth")
>>  x = 5;
>> x = 5;
>> x = 5;
>> # up-arrow twice to show correct history, then Ctrl-C
>> history_control ("erasedups")
>> x = 5;
>> x = 6;
>> x = 5;
>> # up-arrow three times to show correct history, then Ctrl-C
>> exit # now exit and restart Octave, correct history shows


Nothing breaks, but it gives the GUI user a false sense of what is in the
history if any of the history control bits are set.




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