143 lines
3.4 KiB
Factor
143 lines
3.4 KiB
Factor
! Copyright (C) 2005, 2006 Daniel Ehrenberg
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel sequences sequences.private assocs arrays delegate vectors ;
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IN: xml.data
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TUPLE: name space tag url ;
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C: <name> name
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: ?= ( object/f object/f -- ? )
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2dup and [ = ] [ 2drop t ] if ;
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: names-match? ( name1 name2 -- ? )
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[ name-space swap name-space ?= ] 2keep
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[ name-url swap name-url ?= ] 2keep
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name-tag swap name-tag ?= and and ;
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: <name-tag> ( string -- name )
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f swap f <name> ;
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: assure-name ( string/name -- name )
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dup name? [ <name-tag> ] unless ;
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TUPLE: opener name attrs ;
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C: <opener> opener
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TUPLE: closer name ;
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C: <closer> closer
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TUPLE: contained name attrs ;
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C: <contained> contained
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TUPLE: comment text ;
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C: <comment> comment
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TUPLE: directive text ;
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C: <directive> directive
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TUPLE: instruction text ;
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C: <instruction> instruction
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TUPLE: prolog version encoding standalone ;
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C: <prolog> prolog
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TUPLE: tag attrs children ;
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TUPLE: attrs alist ;
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C: <attrs> attrs
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: attr@ ( key alist -- index {key,value} )
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>r assure-name r> attrs-alist
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[ first names-match? ] curry* find ;
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M: attrs at*
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attr@ nip [ second t ] [ f f ] if* ;
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M: attrs set-at
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2dup attr@ nip [
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2nip set-second
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] [
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>r assure-name swap 2array r>
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[ attrs-alist ?push ] keep set-attrs-alist
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] if* ;
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M: attrs assoc-size attrs-alist length ;
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M: attrs new-assoc drop V{ } new <attrs> ;
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M: attrs >alist attrs-alist >alist ;
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: >attrs ( assoc -- attrs )
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dup [
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V{ } assoc-clone-like
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[ >r assure-name r> ] assoc-map
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] when <attrs> ;
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M: attrs assoc-like
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drop dup attrs? [ >attrs ] unless ;
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M: attrs clear-assoc
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f swap set-attrs-alist ;
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M: attrs delete-at
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tuck attr@ drop [ swap attrs-alist delete-nth ] [ drop ] if* ;
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M: attrs clone
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attrs-alist clone <attrs> ;
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INSTANCE: attrs assoc
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: <tag> ( name attrs children -- tag )
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>r >r assure-name r> T{ attrs } assoc-like r>
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{ set-delegate set-tag-attrs set-tag-children }
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tag construct ;
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! For convenience, tags follow the assoc protocol too (for attrs)
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CONSULT: assoc-protocol tag tag-attrs ;
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INSTANCE: tag assoc
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! They also follow the sequence protocol (for children)
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CONSULT: sequence-protocol tag tag-children ;
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INSTANCE: tag sequence
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M: tag like
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over tag? [
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[ delegate ] keep tag-attrs
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rot dup [ V{ } like ] when <tag>
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] unless ;
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M: tag clone
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[ delegate clone ] keep [ tag-attrs clone ] keep
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tag-children clone
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{ set-delegate set-tag-attrs set-tag-children } tag construct ;
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TUPLE: xml prolog before main after ;
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: <xml> ( prolog before main after -- xml )
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{ set-xml-prolog set-xml-before set-delegate set-xml-after }
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xml construct ;
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CONSULT: sequence-protocol xml delegate ;
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INSTANCE: xml sequence
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CONSULT: assoc-protocol xml delegate ;
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INSTANCE: xml assoc
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<PRIVATE
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: tag>xml ( xml tag -- newxml )
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swap [ dup xml-prolog swap xml-before rot ] keep xml-after <xml> ;
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: seq>xml ( xml seq -- newxml )
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over delegate like tag>xml ;
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PRIVATE>
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M: xml clone
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[ xml-prolog clone ] keep [ xml-before clone ] keep
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[ delegate clone ] keep xml-after clone <xml> ;
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M: xml like
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swap dup xml? [
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dup tag? [ tag>xml ] [ seq>xml ] if
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] unless ;
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! tag with children=f is contained
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: <contained-tag> ( name attrs -- tag )
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f <tag> ;
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PREDICATE: tag contained-tag tag-children not ;
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PREDICATE: tag open-tag tag-children ;
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