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