[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
text buffers (was Re: Unicode and Guile)
From: |
Stephen Compall |
Subject: |
text buffers (was Re: Unicode and Guile) |
Date: |
03 Nov 2003 13:35:33 +0000 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 |
> There's a need for a new type, `text', which acts like the text
> contents of an emacs buffer and has (yes I agree) pretty much the
> Emacs interface. It should all be designed so that, internally,
> people can write new ways to represent text objects and multiple
> text object representations can coexist in the same application
> (just like emacs). There's no good reason not to throw in
> attributes, overlays, and markers for text objects too (just like
> emacs).
I am working on sort-of transcribing the code in emacs/src/buffer.[hc]
into a "buffer" data type in a Guile module. I need this because I am
terribly dependent on buffers for almost any kind of data processing
:)
The advantages of transcribing Emacs source are fewer bugs and
carrying over the lovely optimizations, like the gap, that make
buffers work.
Right now, markers are part of the `impl_buffer' C data type. The
intention of `impl_buffer' is to push most of the "good" interface out
to a goops class. However, some of the details, like overlays, may be
better to leave as object properties or new behavior in subclasses,
rather than explicitly in impl_buffer as Emacs does it. And then just
specify that even when (point buf) => 100, and (- (point-max buf)
(point-min buf)) => something over 100, (forward-char buf) won't
necessarily make (point buf) => 101 :)
The other interesting extension is making markers ports. Generics
also provide a solution to the whole "current buffer" annoyance.
On a tangent, would it be useful to generalize the gap concept to be
available to any collection, not just ordered collections of
characters?
--
Stephen Compall or s11 or sirian
Intellect annuls Fate.
So far as a man thinks, he is free.
-- Ralph Waldo Emerson
afsatcom INSCOM JPL broadside Defcon Waco, Texas BCCI kibo Ermes Reno
Crypto AG Telex jihad Panama 22nd SAS
- Re: Unicode and Guile, Kevin Ryde, 2003/11/02
- Re: Unicode and Guile, Andy Wingo, 2003/11/03
- text buffers (was Re: Unicode and Guile),
Stephen Compall <=
- Re: Unicode and Guile, Tom Lord, 2003/11/03
- Re: Unicode and Guile, Andy Wingo, 2003/11/11
- Re: Unicode and Guile, Tom Lord, 2003/11/11
- Re: Unicode and Guile, Marius Vollmer, 2003/11/11
- Re: Unicode and Guile, Tom Lord, 2003/11/11
- Re: Unicode and Guile, Marius Vollmer, 2003/11/11
- Re: Unicode and Guile, Tom Lord, 2003/11/11
- Re: Unicode and Guile, Marius Vollmer, 2003/11/12