[Gambas-user] removing xterm escape codes from terminal text

[Bruce Steers]

On Thu, 9 Jun 2022 at 15:43, Brian G <brian at westwoodsvcs.com> wrote:

>
>
>
> "Failure is the key to success;
>  each mistake teaches us something"  .. Morihei Ueshiba
> Brian G
>
> ----- On Jun 8, 2022, at 1:53 PM, Bruce Steers <bsteers4 at gmail.com> wrote:
>
>
>
> On Wed, 8 Jun 2022 at 13:19, Bruce Steers <bsteers4 at gmail.com> wrote:
>
>>
>>
>> On Wed, 8 Jun 2022 at 05:06, Brian G <brian at westwoodsvcs.com> wrote:
>>
>>> I think there is, I will check it in the morning
>>>
>>> --
>>> Thanks
>>> Brian G
>>> Tuesday, 07 June 2022, 01:20PM -07:00 from Bruce Steers
>>> bsteers4 at gmail.com:
>>>
>>> Has anyone made a routine to strip xterm escape codes from a terminal
>>> text?
>>>
>>> I'm looking at having to have a close study of the
>>> TerminalFilter_VT100.class and try to account for all possible code
>>> combinations to strip them.
>>>
>>> I thought before i spent hours doing it i'd ask if anyone already has
>>> and could share the code.
>>>
>>> Or if there is already a way either an existing function somewhere or
>>> possibly in gb.form.terminal or some other class a function that could do
>>> it.
>>>
>>> I'm looking at TerminalFilter_VT100.class and the function OutputTo()
>>> looks like it could do it , it seems to do all the right processing but for
>>> other reasons. maybe by printing to a stream i could get plain text but i
>>> do not know how to do that :(
>>>
>>> Any thoughts/suggestions?
>>> Many thanks
>>> All the best
>>> BruceS
>>>
>>>
>> Cheers Brian.
>>
>> I have managed this so far but it seems bulky.
>> I added it to TerminalView.class ,
>> Bulky because it makes a whole new hidden form/terminalview and uses it's
>> OutputTo() to print text to it then uses TerminalView.Text,
>> trouble is OutputTo() needs a terminalview object in it's arguments.
>>
>> Could be easier to just use the normal TerminalView.Text and process all
>> the text not one line at a time as it's output. :-/
>>
>> Or maybe I should copy the OutputTo() and Escape() methods and edit them
>> to not print text to a TerminalView stream but return it instead.
>>
>
> I did the above mentioned, copied OutputTo() and Escape() from
> TerminalFilter_VT100.class and removed all functionality and made all Print
> statements assign to a return string instead.
>
> I'll attach the project in case anyone is interested. (feel free to
> optimize/improve the code ;) )
>
> the aim of the project is to enable/disable a private root shell inside an
> application for issuing multiple commands with only one authorization
> request.
> Easy enough to to with a TerminalView and bash but not so easy to get some
> kind of "Wait" ability and getting return values and text from inside the
> bash shell.
>
> It relies on monitoring the process text output, is starts bash and echos
> a "shell-ready" then after the command completes it echos "com-done:$?"
> giving the return value.
>
> Wishing well
> BruceS
>
> I seem to remember there was a callback style thing to allow filtering,
> checking could be a dream!
>
>
> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>
>
>
> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>
> Bruce,
>
>    Did you look at the ConnectTo to method in the terminal view, It allows
> to filter IO
>
> ' allow a connection to a filter or other task
> ' Output is the Pipe on which the connect Task or process will receive
> input
> ' the input stream I the one this process will use to receive input
> ' if a callBack is passed then the preprocess method is executed before
> recieved data is handled by the terminal
> ' Preprocess may return true to have the terminal process the data, or
> false to have the terminal ignore the data
> ' This allows the implementation of a state machine or filter to hande
> extended terminal functions on the stream
>
> Maybe this can help
>

Cheers Brian but Benoit just came up with an OUTRAGEOUSLY simple solution
lol :)

Thanks for looking though :)
BruceS
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