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(library (geiser)
(export geiser:eval
geiser:completions
geiser:module-completions
geiser:autodoc
geiser:no-values
geiser:load-file
geiser:newline
geiser:macroexpand)
(import (chezscheme))
(define (last-index-of str-list char idx last-idx)
(if (null? str-list)
last-idx
(last-index-of (cdr str-list) char (+ 1 idx) (if (char=? char (car str-list)) idx last-idx))))
(define (obj-file-name name)
(let ((idx (last-index-of (string->list name) #\. 0 -1)))
(if (= idx -1)
(string-append name ".so")
(string-append (substring name 0 idx) ".so"))))
(define (geiser:load-file filename)
(let ((output-filename (obj-file-name filename)))
(maybe-compile-file filename output-filename)
(load output-filename)))
(define string-prefix?
(lambda (x y)
(let ([n (string-length x)])
(and (fx<= n (string-length y))
(let prefix? ([i 0])
(or (fx= i n)
(and (char=? (string-ref x i) (string-ref y i))
(prefix? (fx+ i 1)))))))))
(define (geiser:completions prefix . rest)
rest
(sort string-ci<?
(filter (lambda (el)
(string-prefix? prefix el))
(map write-to-string (environment-symbols (interaction-environment))))))
(define (write-to-string x)
(with-output-to-string
(lambda ()
(write x))))
(define (geiser:eval module form . rest)
rest
(let ((output-string (open-output-string)))
(write
(call/cc
(lambda (k)
(with-exception-handler
(lambda (e)
(k `((result "")
(output . ,(get-output-string output-string))
(error (key . ,(with-output-to-string
(lambda ()
(display-condition e))))))))
(lambda ()
(call-with-values
;; evaluate form, allow for multiple return values,
;; and capture output in output-string.
(lambda ()
(parameterize ((current-output-port output-string))
(if module
(eval form (environment module))
(eval form))))
(lambda result
`((result ,(with-output-to-string
(lambda ()
(pretty-print
(if (null? (cdr result)) (car result) result)))))
(output . ,(get-output-string output-string))))))))))
(newline)
(close-output-port output-string)))
(define (geiser:module-completions prefix . rest)
(define (substring? s1 s2)
(let ([n1 (string-length s1)] [n2 (string-length s2)])
(let loop2 ([i2 0])
(let loop1 ([i1 0] [j i2])
(if (fx= i1 n1)
i2
(and (not (fx= j n2))
(if (char=? (string-ref s1 i1) (string-ref s2 j))
(loop1 (fx+ i1 1) (fx+ j 1))
(loop2 (fx+ i2 1)))))))))
(filter (lambda (el)
(substring? prefix el))
(map write-to-string (library-list))))
(define (procedure-parameter-list p)
;; same as (inspect object), then hitting c
(let ((s (((inspect/object p) 'code) 'source)))
(if s
(let ((form (s 'value)))
(if (and (list? form)
(> (length form) 2)
(eq? (car form) 'lambda))
(cadr form)
#f))
#f)))
(define (operator-arglist operator)
(let ((binding (eval operator)))
(if binding
(let ((arglist (procedure-parameter-list binding)))
(let loop ((arglist arglist)
(optionals? #f)
(required '())
(optional '()))
(cond ((null? arglist)
`(,operator ("args" (("required" ,@(reverse required))
("optional" ,@(reverse optional))
("key")
;; ("module" ,module)
))))
((symbol? arglist)
(loop '()
#t
required
(cons "..." (cons arglist optional))))
(else
(loop
(cdr arglist)
optionals?
(if optionals? required (cons (car arglist) required))
(if optionals? (cons (car arglist) optional) optional))))))
'())))
(define (geiser:autodoc ids . rest)
(cond ((null? ids) '())
((not (list? ids))
(geiser:autodoc (list ids)))
((not (symbol? (car ids)))
(geiser:autodoc (cdr ids)))
(else
(map (lambda (id)
(operator-arglist id))
ids))))
(define (geiser:no-values)
#f)
(define (geiser:newline)
#f)
(define (geiser:macroexpand form . rest)
(syntax->datum (expand form))))
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