Re: [Cgdb-users] key bindings

[William P. <bil...@gm...>]

Bob Rossi wrote:
> On Sun, Aug 05, 2007 at 08:19:13AM +0100, William Pursell wrote:
>>
>> I just started using cgdb a few weeks ago, and I'm loving it.  This
>> is a great tool.  Thanks!
>>
>> I'm having a problem that seems related to the discussion in the
>> archive around Aug '04 with the thread subject "key bindings".
> 
> Hi William, 
>  
> There currently isn't a workaround that I know of. However, I would love 
> to see this issue fixed. I don't use readline in vi mode, so I have 
> never run into this problem. 
>  
> For starters, how do you put readline in vi mode when using cgdb? Do you 
> have to put something in your .inputrc? If so, what do you put in there? 

set editing-mode vi

I actually set that as the first line in /etc/inputrc on all
boxes on which I have root.  Well, not quite all, but any box
that I "own"...my co-workers hate me for it, but I think
it's good for them as they might otherwise never even realize that
readline has options.

> 
>> When in GDB mode and with readline in vi-mode, I can do:
>> '<esc>kkAfoo' to append the text 'foo' to the command
>> executed 2 instances back in the history, but I can't
> 
> OK, I'm confused as to why this works for you, I would like to reproduce 
> it. After you type '<esc>kkAfoo', you are still in GDB mode? I would 
> except that you would be put into the source window. 

Yes, still in gdb mode.  I can edit the line as long as I don't
go into insert mode.  (ie, I can delete characters with 'x' and
replace single characters with 'r', but if I use 'i', 'a', or 'R',
I can't get back to command mode in readline)
> 
>> edit the line beyond that.  Ie, if I try to replace
>> 'foo' with 'bar', I would normally do: '<esc>FfRbar',
>> but the esc there is being grabbed by cgdb and sending
>> me into the source window.
> 
> Yes, this currently makes sense to me. 
> 
>> Is there a workaround for this?
> 
> Not that I know of. However, I think if we can come up with a solution 
> to this problem, it shouldn't be to hard to add to CGDB. Is the issue 
> that sometimes when you hit <Esc> you want to stay in GDB mode and 
> sometimes you want to go to CGDB mode? How would CGDB know the 
> difference? 
>  
> One solution, which wouldn't be super friendly, is to provide a way to 
> send esc to readline by having an escape key. For instance, if you type 
> '<esc><esc>',  than that escape goes to gdb. These solutions tend to be 
> a pain on users I think though.

I agree that it would be a pain.  Personally, I would prefer
that esc always go to readline, and some other key be used to
switch to the cgdb window, but I can't see that being an
acceptable solution at all.  Perhaps that could simply be
made an option with an alternate key-binding as a value.
I haven't yet had a chance to read through very much of
the cgdb documentation yet, so I'm not going to have much
insight into what would be appropriate.