55 lines
1.7 KiB
Racket
55 lines
1.7 KiB
Racket
#lang racket/base
|
|
(require racket/contract
|
|
racket/list
|
|
"structures.rkt"
|
|
"reader.rkt"
|
|
"xexpr.rkt")
|
|
|
|
(provide/contract
|
|
; XXX these should both actually return syntax? that is also xexpr/c
|
|
[syntax:read-xml (() (input-port?) . ->* . syntax?)]
|
|
[syntax:read-xml/element (() (input-port?) . ->* . syntax?)])
|
|
|
|
(define (syntax:read-xml [in (current-input-port)])
|
|
(define the-xml (read-xml in))
|
|
(define the-xml-element (document-element the-xml))
|
|
(element->xexpr-syntax the-xml-element))
|
|
|
|
(define (syntax:read-xml/element [in (current-input-port)])
|
|
(define the-xml-element (read-xml/element in))
|
|
(element->xexpr-syntax the-xml-element))
|
|
|
|
(define (position from to)
|
|
(let ([start-offset (location-offset from)])
|
|
(list #f (location-line from) (location-char from) start-offset
|
|
(- (location-offset to) start-offset))))
|
|
|
|
(define (wrap s e)
|
|
(datum->syntax #f e (position (source-start s) (source-stop s))))
|
|
|
|
(define (attribute->syntax a)
|
|
(wrap a (list (attribute-name a) (attribute-value a))))
|
|
|
|
(define (non-dropping-combine atts body)
|
|
(list* (map attribute->syntax atts) body))
|
|
|
|
(define (combine atts body)
|
|
(if (xexpr-drop-empty-attributes)
|
|
(if (empty? atts)
|
|
body
|
|
(non-dropping-combine atts body))
|
|
(non-dropping-combine atts body)))
|
|
|
|
(define (element->xexpr-syntax e)
|
|
(wrap e
|
|
(list* (element-name e)
|
|
(combine (element-attributes e)
|
|
(map content->xexpr-syntax (element-content e))))))
|
|
|
|
(define (content->xexpr-syntax x)
|
|
(cond
|
|
[(element? x) (element->xexpr-syntax x)]
|
|
[(pcdata? x) (wrap x (pcdata-string x))]
|
|
[(entity? x) (wrap x (entity-text x))]
|
|
[else (wrap x x)]))
|