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typesetting/quad/quadwriter/reader-helper.rkt

28 lines
1.0 KiB
Racket

#lang debug racket/base
(require racket/match
scribble/reader
txexpr)
(provide (all-defined-out))
(define (path-string->pdf-path path-string)
(match (format "~a" path-string)
6 years ago
;; weird test but sometimes DrRacket calls the unsaved file
;; 'unsaved-editor and sometimes "unsaved editor"
[(regexp #rx"unsaved.editor")
(build-path (find-system-path 'desk-dir) "untitled.pdf")]
[_ (path-replace-extension path-string #".pdf")]))
(define quad-at-reader (make-at-reader
#:syntax? #t
#:inside? #t
#:command-char #\◊))
(define (xexpr->parse-tree x)
;; an ordinary txexpr can't serve as a parse tree because of the attrs list fails when passed to #%app.
;; so stick an `attr-list` identifier on it which can hook into the expander.
;; sort of SXML-ish.
(let loop ([x x])
(match x
[(txexpr tag attrs elems) (list* tag (cons 'attr-list attrs) (map loop elems))]
[(? list? xs) (map loop xs)]
[_ x])))