229 lines
9.6 KiB
Scheme
229 lines
9.6 KiB
Scheme
|
|
(module decode mzscheme
|
|
(require "struct.ss"
|
|
"decode-struct.ss"
|
|
mzlib/contract
|
|
mzlib/class)
|
|
|
|
(provide decode
|
|
decode-part
|
|
decode-flow
|
|
decode-paragraph
|
|
decode-content
|
|
(rename decode-content decode-elements)
|
|
decode-string
|
|
whitespace?)
|
|
|
|
(provide-structs
|
|
[title-decl ([tag-prefix (or/c false/c string?)]
|
|
[tags (listof tag?)]
|
|
[version (or/c string? false/c)]
|
|
[style any/c]
|
|
[content list?])]
|
|
[part-start ([depth integer?]
|
|
[tag-prefix (or/c false/c string?)]
|
|
[tags (listof tag?)]
|
|
[style any/c]
|
|
[title list?])]
|
|
[splice ([run list?])]
|
|
[part-index-decl ([plain-seq (listof string?)]
|
|
[entry-seq list?])]
|
|
[part-collect-decl ([element (or/c element? part-relative-element?)])]
|
|
[part-tag-decl ([tag tag?])])
|
|
|
|
(define (decode-string s)
|
|
(let loop ([l '((#rx"---" mdash)
|
|
(#rx"--" ndash)
|
|
(#rx"``" ldquo)
|
|
(#rx"''" rdquo)
|
|
(#rx"'" rsquo))])
|
|
(cond [(null? l) (list s)]
|
|
[(regexp-match-positions (caar l) s)
|
|
=> (lambda (m)
|
|
(append (decode-string (substring s 0 (caar m)))
|
|
(cdar l)
|
|
(decode-string (substring s (cdar m)))))]
|
|
[else (loop (cdr l))])))
|
|
|
|
(define (line-break? v)
|
|
(equal? v "\n"))
|
|
|
|
(define (whitespace? v)
|
|
(and (string? v) (regexp-match? #px"^[\\s]*$" v)))
|
|
|
|
(define (decode-accum-para accum)
|
|
(if (andmap whitespace? accum)
|
|
null
|
|
(list (decode-paragraph (reverse (skip-whitespace accum))))))
|
|
|
|
(define (part-version p)
|
|
(if (versioned-part? p)
|
|
(versioned-part-version p)
|
|
#f))
|
|
|
|
(define (decode-flow* l keys colls tag-prefix tags vers style title part-depth)
|
|
(let loop ([l l] [next? #f] [keys keys] [colls colls] [accum null]
|
|
[title title] [tag-prefix tag-prefix] [tags tags] [vers vers]
|
|
[style style])
|
|
(cond
|
|
[(null? l)
|
|
(let ([k-tags (map (lambda (k) `(idx ,(make-generated-tag))) keys)]
|
|
[tags (if (null? tags)
|
|
(list `(part ,(make-generated-tag)))
|
|
tags)])
|
|
(make-versioned-part
|
|
tag-prefix
|
|
(append tags k-tags)
|
|
title
|
|
style
|
|
(let ([l (append
|
|
(map (lambda (k tag)
|
|
(make-index-element #f null tag
|
|
(part-index-decl-plain-seq k)
|
|
(part-index-decl-entry-seq k)
|
|
#f))
|
|
keys k-tags)
|
|
colls)])
|
|
(if (and title (not (or (eq? 'hidden style)
|
|
(and (list? style) (memq 'hidden style)))))
|
|
(cons (make-index-element
|
|
#f null (car tags)
|
|
(list (regexp-replace
|
|
#px"^(?:A|An|The)\\s" (content->string title) ""))
|
|
(list (make-element #f title))
|
|
(make-part-index-desc))
|
|
l)
|
|
l))
|
|
(make-flow (decode-accum-para accum))
|
|
null
|
|
vers))]
|
|
[(title-decl? (car l))
|
|
(cond [(not part-depth) (error 'decode "misplaced title: ~e" (car l))]
|
|
[title (error 'decode "found extra title: ~v" (car l))]
|
|
[else (loop (cdr l) next? keys colls accum
|
|
(title-decl-content (car l))
|
|
(title-decl-tag-prefix (car l))
|
|
(title-decl-tags (car l))
|
|
(title-decl-version (car l))
|
|
(title-decl-style (car l)))])]
|
|
[(block? (car l))
|
|
(let ([para (decode-accum-para accum)]
|
|
[part (decode-flow* (cdr l) keys colls tag-prefix tags vers style
|
|
title part-depth)])
|
|
(make-versioned-part
|
|
(part-tag-prefix part)
|
|
(part-tags part)
|
|
(part-title-content part)
|
|
(part-style part)
|
|
(part-to-collect part)
|
|
(make-flow (append para (list (car l))
|
|
(flow-paragraphs (part-flow part))))
|
|
(part-parts part)
|
|
(part-version part)))]
|
|
[(part? (car l))
|
|
(let ([para (decode-accum-para accum)]
|
|
[part (decode-flow* (cdr l) keys colls tag-prefix tags vers style
|
|
title part-depth)])
|
|
(make-versioned-part
|
|
(part-tag-prefix part)
|
|
(part-tags part)
|
|
(part-title-content part)
|
|
(part-style part)
|
|
(part-to-collect part)
|
|
(make-flow (append para (flow-paragraphs (part-flow part))))
|
|
(cons (car l) (part-parts part))
|
|
(part-version part)))]
|
|
[(and (part-start? (car l))
|
|
(or (not part-depth)
|
|
((part-start-depth (car l)) . <= . part-depth)))
|
|
(unless part-depth (error 'decode "misplaced part: ~e" (car l)))
|
|
(let ([s (car l)])
|
|
(let loop ([l (cdr l)]
|
|
[s-accum null])
|
|
(if (or (null? l)
|
|
(or (and (part-start? (car l))
|
|
((part-start-depth (car l)) . <= . part-depth))
|
|
(part? (car l))))
|
|
(let ([para (decode-accum-para accum)]
|
|
[s (decode-styled-part (reverse s-accum)
|
|
(part-start-tag-prefix s)
|
|
(part-start-tags s)
|
|
(part-start-style s)
|
|
(part-start-title s)
|
|
(add1 part-depth))]
|
|
[part (decode-flow* l keys colls tag-prefix tags vers style title part-depth)])
|
|
(make-versioned-part (part-tag-prefix part)
|
|
(part-tags part)
|
|
(part-title-content part)
|
|
(part-style part)
|
|
(part-to-collect part)
|
|
(make-flow para)
|
|
(cons s (part-parts part))
|
|
(part-version part)))
|
|
(if (splice? (car l))
|
|
(loop (append (splice-run (car l)) (cdr l)) s-accum)
|
|
(loop (cdr l) (cons (car l) s-accum))))))]
|
|
[(splice? (car l))
|
|
(loop (append (splice-run (car l)) (cdr l)) next? keys colls accum title tag-prefix tags vers style)]
|
|
[(null? (cdr l)) (loop null #f keys colls (cons (car l) accum) title tag-prefix tags vers style)]
|
|
[(part-index-decl? (car l))
|
|
(loop (cdr l) next? (cons (car l) keys) colls accum title tag-prefix tags vers style)]
|
|
[(part-collect-decl? (car l))
|
|
(loop (cdr l) next? keys (cons (part-collect-decl-element (car l)) colls) accum title tag-prefix tags vers style)]
|
|
[(part-tag-decl? (car l))
|
|
(loop (cdr l) next? keys colls accum title tag-prefix (append tags (list (part-tag-decl-tag (car l)))) vers style)]
|
|
[(and (pair? (cdr l))
|
|
(splice? (cadr l)))
|
|
(loop (cons (car l) (append (splice-run (cadr l)) (cddr l))) next? keys colls accum title tag-prefix tags vers style)]
|
|
[(line-break? (car l))
|
|
(if next?
|
|
(loop (cdr l) #t keys colls accum title tag-prefix tags vers style)
|
|
(let ([m (match-newline-whitespace (cdr l))])
|
|
(if m
|
|
(let ([part (loop m #t keys colls null title tag-prefix tags vers style)])
|
|
(make-versioned-part (part-tag-prefix part)
|
|
(part-tags part)
|
|
(part-title-content part)
|
|
(part-style part)
|
|
(part-to-collect part)
|
|
(make-flow (append (decode-accum-para accum)
|
|
(flow-paragraphs (part-flow part))))
|
|
(part-parts part)
|
|
(part-version part)))
|
|
(loop (cdr l) #f keys colls (cons (car l) accum) title tag-prefix tags vers style))))]
|
|
[else (loop (cdr l) #f keys colls (cons (car l) accum) title tag-prefix tags vers style)])))
|
|
|
|
(define (decode-part l tags title depth)
|
|
(decode-flow* l null null #f tags #f #f title depth))
|
|
|
|
(define (decode-styled-part l tag-prefix tags style title depth)
|
|
(decode-flow* l null null tag-prefix tags #f style title depth))
|
|
|
|
(define (decode-flow l)
|
|
(part-flow (decode-flow* l null null #f null #f #f #f #f)))
|
|
|
|
(define (match-newline-whitespace l)
|
|
(cond [(null? l) #f]
|
|
[(line-break? (car l))
|
|
(skip-whitespace l)]
|
|
[(splice? (car l))
|
|
(match-newline-whitespace (append (splice-run (car l)) (cdr l)))]
|
|
[(whitespace? (car l))
|
|
(match-newline-whitespace (cdr l))]
|
|
[else #f]))
|
|
|
|
(define (skip-whitespace l)
|
|
(if (or (null? l) (not (whitespace? (car l))))
|
|
l
|
|
(skip-whitespace (cdr l))))
|
|
|
|
(define (decode l)
|
|
(decode-part l null #f 0))
|
|
|
|
(define (decode-paragraph l)
|
|
(make-paragraph (decode-content l)))
|
|
|
|
(define (decode-content l)
|
|
(apply append (map (lambda (s) (if (string? s) (decode-string s) (list s)))
|
|
(skip-whitespace l)))))
|