1 ;;; user.rkt -- global bindings visible to geiser users
3 ;; Copyright (C) 2010, 2011, 2012 Jose Antonio Ortega Ruiz
5 ;; This program is free software; you can redistribute it and/or
6 ;; modify it under the terms of the Modified BSD License. You should
7 ;; have received a copy of the license along with this program. If
8 ;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
10 ;; Start date: Wed Mar 31, 2010 22:24
14 (provide init-geiser-repl run-geiser-server start-geiser)
16 (require (for-syntax racket/base)
27 (define top-namespace (current-namespace))
28 (define last-entered (make-parameter ""))
30 (define (do-enter mod name)
32 (current-namespace (module->namespace mod))
35 (define (enter! mod stx)
37 (current-namespace top-namespace)
39 [(symbol? mod) (do-enter mod (symbol->string mod))]
43 (path-string? (cadr mod))) (do-enter mod (cadr mod))]
44 [(path-string? mod) (do-enter `(file ,mod) mod)]
45 [else (raise-syntax-error
47 "not a valid module path, and not #f"
51 (define orig-loader (current-load/use-compiled))
52 (define geiser-loader (module-loader orig-loader))
55 (define geiser-main (module->namespace 'geiser))
56 (define (eval-here form) (eval form geiser-main))
62 (cond [(equal? form '(unquote apply))
63 (let* ([proc (eval-here (read))]
64 [args (map eval-here (read))]
65 [ev (lambda () (apply proc args))])
66 (eval-in `(,ev) mod lang))]
67 [else ((geiser:eval lang) form mod)])))))
69 (define ((geiser-read prompt))
72 (let* ([in ((current-get-interaction-input-port))]
73 [form ((current-read-interaction) (object-name in) in)])
75 [(uq cmd) (eq? 'unquote (syntax-e #'uq))
76 (case (syntax-e #'cmd)
77 [(start-geiser) (datum->syntax #f `(list 'port ,(start-geiser)))]
78 [(enter) (enter! (read) #'cmd)]
79 [(geiser-eval) (geiser-eval)]
80 [(geiser-no-values) (datum->syntax #f (void))]
81 [(add-to-load-path) (add-to-load-path (read))]
82 [(set-image-cache) (image-cache (read))]
83 [(image-cache) (image-cache)]
84 [(gcd) (current-directory)]
85 [(cd) (current-directory (read))]
92 (namespace->module-name (current-namespace) (last-entered)))))
95 (let ([ensure-dir (lambda (dir)
96 (and (path-string? dir)
97 (begin (make-directory* dir) dir)))])
98 (make-parameter #f ensure-dir)))
100 (define (geiser-prompt-read prompt)
101 (make-repl-reader (geiser-read prompt)))
103 (define (geiser-save-tmpimage imgbytes)
104 ;; Save imgbytes to a new temporary file and return the filename
105 (define filename (make-temporary-file "geiser-img-~a.png" #f (image-cache)))
106 (with-output-to-file filename #:exists 'truncate
107 (lambda () (display imgbytes)))
110 (define (geiser-maybe-print-image value)
112 [(and (convertible? value)
113 (convert value 'png-bytes))
114 => (lambda (pngbytes)
115 ;; (The above could be problematic if a future version of racket
116 ;; suddenly decides it can "convert" strings to picts)
117 (printf "#<Image: ~a>\n" (geiser-save-tmpimage pngbytes)))]
119 (unless (void? value)
120 (pretty-print value))]))
122 (define (init-geiser-repl)
123 (compile-enforce-module-constants #f)
124 (current-load/use-compiled geiser-loader)
125 (current-prompt-read (geiser-prompt-read geiser-prompt))
126 (current-print geiser-maybe-print-image))
128 (define (run-geiser-repl in out enforce-module-constants)
129 (parameterize [(compile-enforce-module-constants enforce-module-constants)
130 (current-input-port in)
131 (current-output-port out)
132 (current-error-port out)
133 (current-load/use-compiled geiser-loader)
134 (current-prompt-read (geiser-prompt-read geiser-prompt))
135 (current-print geiser-maybe-print-image)]
136 (read-eval-print-loop)))
138 (define server-channel (make-channel))
140 (define (run-geiser-server port enforce-module-constants)
143 (run-geiser-repl in out enforce-module-constants))
147 (let ([lsner (tcp-listen p)])
148 (let-values ([(_ p __ ___) (tcp-addresses lsner #t)])
149 (channel-put server-channel p)
152 (define (start-geiser (port 0) (enforce-module-constants #f))
153 (thread (lambda () (run-geiser-server port enforce-module-constants)))
154 (channel-get server-channel))