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avoid all characters that have to be encoded in Scribble-generated HTML anchors

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svn: r7994

original commit: 914a3ab7844733a169110e1c71fb6bf3514f6b83
This commit is contained in:
Matthew Flatt 2007-12-13 17:49:52 +00:00
parent f1072f827d
commit 65702bffbe
1 changed files with 14 additions and 5 deletions
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19
collects/scribble/html-render.ss
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@ -39,19 +39,28 @@
(main-collects-relative->path p))))
;; HTML anchors are case-insenstive. To make them
;; distinct, add a "^" in front of capital letters.
;; distinct, add a "." in front of capital letters.
;; Also clean up characters that give browers trouble
;; (i.e., the ones that are not allowed as-in in URI
;; codecs) by using "~" followed by a hex encoding.
(define (anchor-name v)
(let loop ([s (format "~a" v)])
(cond
[(regexp-match-positions #rx"[A-Z:]" s)
[(regexp-match-positions #rx"[A-Z.]" s)
=> (lambda (m)
(string-append
(loop (substring s 0 (caar m)))
"."
(substring s (caar m) (cdar m))
(loop (substring s (cdar m)))))]
[(regexp-match-positions #rx"[^-a-zA-Z0-9_!*'().]" s)
=> (lambda (m)
(string-append
(substring s 0 (caar m))
":"
(substring s (caar m) (cdar m))
"~"
(format "~x" (char->integer (string-ref s (caar m))))
(loop (substring s (cdar m)))))]
[else s])))
;; ----------------------------------------
;; main mixin