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(library (geiser)
(export geiser:eval
geiser:completions
geiser:module-completions
geiser:autodoc
geiser:no-values
geiser:newline)
(import (chezscheme))
(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* ((try-eval (lambda (x . y)
(call/cc
(lambda (k)
(with-exception-handler
(lambda (e)
(k e))
(lambda ()
(if (null? y) (eval x)
(eval x (car y)))
))))))
(result-mid (call-with-values
(lambda () (if module
(try-eval form (environment module))
(try-eval form)))
(lambda (x . y)
(if (null? y)
x
(cons x y)))))
(result result-mid)
(error (if (condition? result-mid)
(cons 'error (list
(cons 'key
(with-output-to-string
(lambda () (display-condition result-mid))))))
'())))
(write `((result ,(write-to-string result))
(output . "")
,error))
(newline)))
(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))
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