racket/collects/macro-debugger/syntax-browser/image.rkt
2010-04-27 16:50:15 -06:00

97 lines
3.1 KiB
Racket

#lang scheme/base
(require scheme/contract
scheme/class
scheme/gui
framework
"prefs.ss"
"controller.ss"
"display.ss")
#|
Code for generating images that look like the contents of a syntax
browser, with the same pretty-printing, mark-based coloring,
suffixing, etc.
TODO: tacked arrows
|#
(provide/contract
[print-syntax-columns
(parameter/c (or/c exact-positive-integer? 'infinity))]
[print-syntax-to-png
(->* (syntax? path-string?)
(#:columns (or/c exact-positive-integer? 'infinity))
any)]
[print-syntax-to-bitmap
(->* (syntax?)
(#:columns (or/c exact-positive-integer? 'infinity))
(is-a?/c bitmap%))]
[print-syntax-to-eps
(->* (syntax? path-string?)
(#:columns (or/c exact-positive-integer? 'infinity))
any)])
;; print-syntax-columns : (parameter-of (U number 'infinity))
(define print-syntax-columns (make-parameter 40))
(define standard-text% (editor:standard-style-list-mixin text%))
;; print-syntax-to-png : syntax path -> void
(define (print-syntax-to-png stx file
#:columns [columns (print-syntax-columns)])
(let ([bmp (print-syntax-to-bitmap stx columns)])
(send bmp save-file file 'png))
(void))
;; print-syntax-to-bitmap : syntax -> (is-a?/c bitmap%)
(define (print-syntax-to-bitmap stx
#:columns [columns (print-syntax-columns)])
(define t (prepare-editor stx columns))
(define f (new frame% [label "dummy"]))
(define ec (new editor-canvas% (editor t) (parent f)))
(define dc (new bitmap-dc% (bitmap (make-object bitmap% 1 1))))
(define char-width
(let* ([sl (send t get-style-list)]
[style (send sl find-named-style "Standard")]
[font (send style get-font)])
(send dc set-font font)
(send dc get-char-width)))
(let ([ew (box 0.0)]
[eh (box 0.0)])
(send t set-min-width (* columns char-width))
(send t get-extent ew eh)
(let* ([w (inexact->exact (unbox ew))]
[h (inexact->exact (unbox eh))]
[bmp (make-object bitmap% w (+ 1 h))]
[ps (new ps-setup%)])
(send dc set-bitmap bmp)
(send dc set-background (make-object color% "White"))
(send dc clear)
(send ps set-margin 0 0)
(send ps set-editor-margin 0 0)
(parameterize ((current-ps-setup ps))
(send t print-to-dc dc 1))
bmp)))
;; print-syntax-to-eps : syntax path -> void
(define (print-syntax-to-eps stx file
#:columns [columns (print-syntax-columns)])
(define t (prepare-editor stx columns))
(define ps-setup (new ps-setup%))
(send ps-setup set-mode 'file)
(send ps-setup set-file file)
(send ps-setup set-scaling 1 1)
(parameterize ((current-ps-setup ps-setup))
(send t print #f #f 'postscript #f #f #t)))
(define (prepare-editor stx columns)
(define t (new standard-text%))
(define sl (send t get-style-list))
(send t change-style (send sl find-named-style "Standard"))
(print-syntax-to-editor stx t
(new controller%) (new syntax-prefs/readonly%)
columns (send t last-position))
t)