[Jscheme-devel] Re: JScheme SchemeApplet - UC WISE Citris Project

[Dazhi L. <da...@uc...>]

Hi Timothy,

Thank you for asking! Actually it went pretty well.

We rewrote part of that EditArea component so it does basic paren
matching and indenting, enough for a listener. Since our project
requires a more sophisticated Scheme editor, which should be able to do
syntax highlighting, custmizable indenting and find/replace etc, we did
this with Swing. So a jseditor module is added to the project, which can
communicate with instances of listeners through a static hashtable
(AppletStore).

Our latest working version and source can be found at:
http://wiser.cs.berkeley.edu/citris/darrel/jscheme/

BTW, a quick question: After user program in JScheme for a while, is
there an easy way to erase all user defined bindings, that is, to return
to the initial state of JScheme?

I'll take a look at your link. But since I'm graduating and sort of
finishing up my work on this project, I may not have time to switch to a
different implementation.

Darrel


Timothy Hickey wrote:

> Hi Darrel,
>
> How has your Scheme interpreter applet project for WISE been
> progressing lately?
>
> I recently checked in a new Scheme Interpereter applet
> that you might be interested in. It should run in all browsers
>
> http://www.cs.brandeis.edu/~tim/jscheme/src/jlib/demo/SchemeEval.html
>
> and it does "paren matching" and auto-indenting.
>
> Since "flashing" parens is fairly difficult to implement in Java 1.1,
> this applet has an extra textarea showing the most recently
> matched complete expression. It is implemented entirely in
> Scheme with no additional Java classes needed.
>
> Please feel free to "steal" anything you want from the code,
> it is open-source with zlib/png licensing (the most open of
> the open-source licenses).
>
> We hope to add a "reformat" button, that will auto-indent every
> line of the file. Also, improved error reporting would be
> helpful especially for pedagogical purposes. For Java 1.2+
> applets (or Java Web Start), we can use Swing highlighting
> for paren matching....
>
> ----Tim---