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Scribble: improve Unicode handling for Latex/PDF output

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Normalize strings to composed form before splitting a
string into characters to handle individually.

original commit: d970d5aaead2bfbae0651b583f79e6ac719c7d39
This commit is contained in:
Matthew Flatt 2014-06-23 06:25:26 +01:00
parent 6ac2c7cfef
commit e5ebb45c06
1 changed files with 5 additions and 1 deletions
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6
pkgs/scribble-pkgs/scribble-lib/scribble/latex-render.rkt
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@ -823,6 +823,10 @@
[(#\}) (display "\\%7d")] [(#\}) (display "\\%7d")]
[else (display c)]))] [else (display c)]))]
[else [else
;; Start by normalizing to "combined" form, so that Racket characters
;; are closer to Unicode characters (e.g., ä is one character, instead
;; of a combining character followed by "a").
(let ([s (string-normalize-nfc s)])
(let ([len (string-length s)]) (let ([len (string-length s)])
(let loop ([i 0]) (let loop ([i 0])
(unless (= i len) (unless (= i len)
@ -1082,7 +1086,7 @@
c)] c)]
[else c])])]) [else c])])])
c)]))) c)])))
(loop (add1 i)))))])) (loop (add1 i))))))]))
(define/private (box-character c) (define/private (box-character c)