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From: "Peter J. Holzer" <hjp-python@hjp.at>
Newsgroups: comp.lang.python
Subject: Re: Terminal Emulator
Date: Sat, 18 May 2024 17:08:43 +0200
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On 2024-05-14 16:03:33 -0400, Grant Edwards via Python-list wrote:
> On 2024-05-14, Alan Gauld via Python-list <python-list@python.org> wrote:
> > On 14/05/2024 18:44, Gordinator via Python-list wrote:
> >
> >> I wish to write a terminal emulator in Python. I am a fairly
> >> competent Python user, and I wish to try a new project idea. What
> >> references can I use when writing my terminal emulator? I wish for
> >> it to be a true terminal emulator as well, not just a Tk text
> >> widget or something like that.
> >
> > The first thing is to decide which terminal.
>=20
> If you want to make life easier, make it a superset of a terminal that
> already exists in the terminfo database.
>=20
> Going with some sort of ANSI terminal will probably provide
> operability even with dumb apps which ignore $TERM and just spit out
> basic ANSI escape sequences.
And if you want to go for a superset, xterm might be one of the more
useful: https://www.xfree86.org/current/ctlseqs.html
> If you really want to break trail, you could invent your own control
> sequences, which means you'll have to write terminfo and/or termcap
> entries as well as the terminal emulator.
Right. A saner model than ANSI and its supersets might be a good idea
conceptionally. But I'd expect quite a few programs to break.
> > A VT100 is very different from a 3270. And even a VT330 is quite
> > different from a VT100 although sharing a common subset of control
> > codes. And if you start looking at graphical terminals things get
> > even more interesting!
>=20
> "Intersting" is putting it mildly...
Yup. Also there aren't many programs which use, e.g. xterm's
pixel-graphics capabilities.
OTOH, there is something like domterm[1], which can (theoretically)
display anything a browser can display.
hp
[1] https://domterm.org/index.html
--=20
_ | Peter J. Holzer | Story must make more sense than reality.
|_|_) | |
| | | hjp@hjp.at | -- Charles Stross, "Creative writing
__/ | http://www.hjp.at/ | challenge!"
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