101 lines
2.5 KiB
Factor
101 lines
2.5 KiB
Factor
! Copyright (C) 2007, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors namespaces make sequences kernel math arrays io
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ui.gadgets generic combinators fry sets ;
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IN: ui.traverse
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TUPLE: node value children ;
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: traverse-step ( path gadget -- path' gadget' )
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[ unclip ] dip children>> ?nth ;
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: make-node ( quot -- ) { } make node boa , ; inline
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: traverse-to-path ( topath gadget -- )
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dup not [
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2drop
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] [
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over empty? [
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nip ,
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] [
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[
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[ children>> swap first head-slice % ]
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[ nip ]
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[ traverse-step traverse-to-path ]
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2tri
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] make-node
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] if
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] if ;
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: traverse-from-path ( frompath gadget -- )
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dup not [
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2drop
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] [
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over empty? [
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nip ,
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] [
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[
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[ traverse-step traverse-from-path ]
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[ nip ]
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[ children>> swap first 1 + tail-slice % ]
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2tri
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] make-node
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] if
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] if ;
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: traverse-pre ( frompath gadget -- )
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traverse-step traverse-from-path ;
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: (traverse-middle) ( frompath topath gadget -- )
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[ first 1 + ] [ first ] [ children>> ] tri* <slice> % ;
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: traverse-post ( topath gadget -- )
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traverse-step traverse-to-path ;
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: traverse-middle ( frompath topath gadget -- )
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[
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3dup nip traverse-pre
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3dup (traverse-middle)
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2dup traverse-post
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2nip
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] make-node ;
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DEFER: (gadget-subtree)
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: traverse-child ( frompath topath gadget -- )
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[ 2nip ] 3keep
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[ [ rest-slice ] 2dip traverse-step (gadget-subtree) ]
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make-node ;
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: (gadget-subtree) ( frompath topath gadget -- )
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{
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{ [ dup not ] [ 3drop ] }
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{ [ pick empty? pick empty? and ] [ 2nip , ] }
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{ [ pick empty? ] [ traverse-to-path drop ] }
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{ [ over empty? ] [ nip traverse-from-path ] }
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{ [ pick first pick first = ] [ traverse-child ] }
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[ traverse-middle ]
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} cond ;
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: gadget-subtree ( frompath topath gadget -- seq )
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[ (gadget-subtree) ] { } make ;
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M: node gadget-text*
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[ children>> ] [ value>> ] bi gadget-seq-text ;
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: gadget-text-range ( frompath topath gadget -- str )
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gadget-subtree gadget-text ;
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: gadget-at-path ( parent path -- gadget )
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[ swap nth-gadget ] each ;
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GENERIC#: leaves* 1 ( tree set -- )
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M: node leaves* [ children>> ] dip leaves* ;
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M: array leaves* '[ _ leaves* ] each ;
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M: gadget leaves* adjoin ;
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: leaves ( tree -- set ) HS{ } clone [ leaves* ] keep ;
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