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Diffstat (limited to 'scheme/racket/geiser/user.rkt')
| -rw-r--r-- | scheme/racket/geiser/user.rkt | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/scheme/racket/geiser/user.rkt b/scheme/racket/geiser/user.rkt index c8cca24..38eefd8 100644 --- a/scheme/racket/geiser/user.rkt +++ b/scheme/racket/geiser/user.rkt @@ -14,7 +14,10 @@ (provide init-geiser-repl run-geiser-server start-geiser) (require (for-syntax racket/base) + file/convertible mzlib/thread + racket/file + racket/pretty racket/tcp geiser geiser/enter @@ -88,10 +91,30 @@ (define (geiser-prompt-read prompt) (make-repl-reader (geiser-read prompt))) +(define (geiser-save-tmpimage imgbytes) + ;; Save imgbytes to a new temporary file and return the filename + (define filename (make-temporary-file "geiser-img-~a.png")) + (with-output-to-file filename #:exists 'truncate + (lambda () (display imgbytes))) + filename) + +(define (geiser-maybe-print-image value) + (cond + [(and (convertible? value) + (convert value 'png-bytes)) + => (lambda (pngbytes) + ;; (The above could be problematic if a future version of racket + ;; suddenly decides it can "convert" strings to picts) + (printf "#<Image: ~a>\n" (geiser-save-tmpimage pngbytes)))] + [else + (unless (void? value) + (pretty-print value))])) + (define (init-geiser-repl) (compile-enforce-module-constants #f) (current-load/use-compiled geiser-loader) - (current-prompt-read (geiser-prompt-read geiser-prompt))) + (current-prompt-read (geiser-prompt-read geiser-prompt)) + (current-print geiser-maybe-print-image)) (define (run-geiser-repl in out enforce-module-constants) (parameterize [(compile-enforce-module-constants enforce-module-constants) @@ -99,7 +122,8 @@ (current-output-port out) (current-error-port out) (current-load/use-compiled geiser-loader) - (current-prompt-read (geiser-prompt-read geiser-prompt))] + (current-prompt-read (geiser-prompt-read geiser-prompt)) + (current-print geiser-maybe-print-image)] (read-eval-print-loop))) (define server-channel (make-channel)) |