141 lines
3.7 KiB
Text
141 lines
3.7 KiB
Text
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{-|
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Render an `XML` value as `Text`
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For indentation and schema validation, see the `xmllint` utility
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bundled with libxml2.
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```
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let XML = ./package.dhall
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in XML.render
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( XML.element
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{ name = "foo"
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, attributes = [ XML.attribute "a" "x", XML.attribute "b" (Natural/show 2) ]
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, content = [ XML.leaf { name = "bar", attributes = XML.emptyAttributes } ]
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}
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)
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= "<foo a=\"x\" b=\"2\"><bar/></foo>"
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```
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-}
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let XML =
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missing
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sha256:ab91a0edaf0513e0083b1dfae5efa160adc99b0e589775a4a699ab77cce528a9
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? ./Type.dhall
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let Text/concatMap =
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missing
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sha256:7a0b0b99643de69d6f94ba49441cd0fa0507cbdfa8ace0295f16097af37e226f
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? ../Text/concatMap.dhall
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let Text/concat =
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missing
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sha256:731265b0288e8a905ecff95c97333ee2db614c39d69f1514cb8eed9259745fc0
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? ../Text/concat.dhall
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let element =
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missing
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sha256:79266d604e147caf37e985581523b684f7bac66de0c93dd828841df3dfc445f9
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? ./element.dhall
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let text =
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missing
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sha256:a59670560a08bfc815893dee1f3eae21a5252400f8a619d1cd7bdd9f48eea2ab
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? ./text.dhall
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let emptyAttributes =
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missing
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sha256:11b86e2d3f3c75d47a1d580213d2a03fd2c36d64f3e9b6381de0ba23472f64d5
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? ./emptyAttributes.dhall
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let Attr = { mapKey : Text, mapValue : Text }
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let esc = λ(x : Text) → λ(y : Text) → Text/replace x "&${y};"
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let `escape&` = esc "&" "amp"
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let `escape<` = esc "<" "lt"
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let `escape>` = esc ">" "gt"
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let `escape'` = esc "'" "apos"
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let `escape"` = esc "\"" "quot"
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let escapeCommon = λ(text : Text) → `escape<` (`escape&` text)
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let escapeAttr = λ(text : Text) → `escape"` (`escape'` (escapeCommon text))
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let escapeText = λ(text : Text) → `escape>` (escapeCommon text)
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let renderAttr = λ(x : Attr) → " ${x.mapKey}=\"${escapeAttr x.mapValue}\""
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let render
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: XML → Text
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= λ(x : XML) →
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x
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Text
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{ text = escapeText
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, rawText = λ(t : Text) → t
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, element =
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λ ( elem
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: { attributes : List { mapKey : Text, mapValue : Text }
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, content : List Text
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, name : Text
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}
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) →
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let attribs = Text/concatMap Attr renderAttr elem.attributes
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in "<${elem.name}${attribs}"
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++ ( if Natural/isZero (List/length Text elem.content)
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then "/>"
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else ">${Text/concat elem.content}</${elem.name}>"
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)
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}
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let simple =
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λ(name : Text) →
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λ(content : List XML) →
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element { name, attributes = emptyAttributes, content }
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let example0 =
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assert
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: render
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( simple
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"note"
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[ simple "to" [ text "Tove" ]
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, simple "from" [ text "Jani" ]
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, simple "heading" [ text "Reminder" ]
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, simple "body" [ text "Don't forget me this weekend!" ]
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]
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)
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≡ Text/replace
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"\n"
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""
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''
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<note>
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<to>Tove</to>
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<from>Jani</from>
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<heading>Reminder</heading>
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<body>Don't forget me this weekend!</body>
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</note>
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''
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let example1 =
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assert
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: render
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( element
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{ name = "escape"
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, attributes = toMap { attribute = "<>'\"&" }
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, content = [ text "<>'\"&" ]
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}
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)
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≡ Text/replace
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"\n"
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""
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''
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<escape attribute="<>'"&"><>'"&</escape>
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''
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in render
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