Jon, Let me describe my setup to you, I have written a product (currently not released and currently only on mac) that combines a web-browser with a webserver. The webserver accepts a call containing the javascript you want to evaluate and returns the evaluation of it. This works very well with parenscript. I have written a macro that essentially 1) translates the Parenscript code to JS 2) sends this stuff to the web-browser and 3) returns the evaluated code Because I am working with cappuccino, and that uses 'objective-j', my macro name is 'oj' so if I evaluate from lisp (oj (+ 1 2)) I get '3' back in my repl (no going to the browser, but it was actually computed in the browser) likewise, when I have my js application loaded in the browser I can do this: (oj (set-frame emailtable 20 20 330 240) (set-frame subject 20 20 350 32) (set-frame body 20 20 350 190) (next-to emailtable subject) (below subject body) (below emailtable reset-email-button) (next-to reset-email-button save-email-button)) the macro runs a bunch of parenscript macros to generate the stuff that plays nice with the cappuccino framework, which gets evaluated in the browser. The effect is immediate - Lets say I change the size of emailtable (in lisp), and re-evaluate it ( in emacs C-M-x), everything adjusts on the screen of the browser - no reload. This way, I get the stuff that we all love about lisp when I am working with javascript. Now there are times when I need to reload the whole enchelada (sp??) - for this I wrote a maco that steps through all of the 'oj' macros and sends it a peice at a time to the browser. (otherwise I'd send it 90k of stuff all in one request, which currently breaks somewhere) Finally, I have one more macro that I can wrap all of the other 'oj' macros with that will write it to a file if I want to push it to an external website. If you are using mac and want to try my little browser, please let me know. Even though I consider it 'pre-alpha' it is really quite useful. Hope this helps, Kelly On Sat, Jan 8, 2011 at 4:44 PM, Jon Rosebaugh <chairos@gmail.com> wrote:
As I said in the subject, I'm working on a JS-only (no server-side code) HTML5 webapp in Parenscript with jQuery. I have extensive JS experience, but I'm really new to Common Lisp.
I wanted a setup where I could edit a Parenscript file, hit save, then hit refresh in my browser and immediately see the new code, just as if I were working in Javascript. I built a little server using Hunchentoot and cl-who that runs ps-compile-file on my parenscript source file as needed. This works fairly well, but maybe is not the best way to accomplish this.
However, there's a problem; I wanted to use parenscript functions without the namespace, so I defined a package in serve.lisp that uses parenscript, then put (in-package :innkeeper) at the top of my parenscript file. This doesn't work properly in the 2.2 release of Parenscript (which is what Quicklisp provides). It _does_ work in the git repo version (as of commit 0e01e555f404a7dcb8befb7587288c38abf526c2), but it's annoying to not be able to use Quicklisp for everything.
Once I have a release version I'll want to come up with some lisp program that compiles the parenscript to javascript, minifies it, and sticks it in an also-minified html file from cl-who, so the whole thing is compiled down to a single file. I'd appreciate any best-practice tips on that too.
Just in case my description was unclear, here's what I think are the relevant bits. If needed, I can provide the entire files off-list.
; relevant bits of serve.lisp (defpackage "INNKEEPER" (:use "COMMON-LISP" "HUNCHENTOOT" "CL-WHO" "PARENSCRIPT") (:export :start-innserver :stop-innserver))
(in-package :innkeeper)
(define-easy-handler (jsgen :uri "/innkeeper.js") () (setf (content-type*) "application/javascript") (ps-compile-file "/Users/jon/code/innkeeper/innkeeper.lisp"))
; beginning (and a few representative lines) of innkeeper.lisp
(in-package :innkeeper)
(defmacro immediate (&body body) `((lambda () ,@body)))
(var *inn* (create setup (lambda () ((@ ($ "#top-tabs") tabs)))))
(j-query #'(@ *inn* setup))
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