1 ! Copyright (C) 2009 Daniel Ehrenberg
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors grouping kernel math sequences
4 sequences.private splitting.monotonic wrap ;
7 TUPLE: word key width break? ;
12 : words-length ( words -- length )
15 : make-element ( whites blacks -- element )
16 [ append ] [ [ words-length ] bi@ ] 2bi <element> ;
18 : ?first2 ( seq -- first/f second/f )
19 dup length dup 1 > [ drop first2-unsafe ] [
20 0 > [ first-unsafe f ] [ drop f f ] if
23 : split-words ( seq -- half-elements )
24 [ [ break?>> ] same? ] monotonic-split ;
26 : ?first-break ( seq -- newseq f/element )
27 dup first first break?>>
28 [ unclip-slice f swap make-element ]
31 : make-elements ( seq f/element -- elements )
32 [ 2 group [ ?first2 make-element ] map! ] dip
35 : words>elements ( seq -- newseq )
36 split-words ?first-break make-elements ;
40 : wrap-words ( words line-max line-ideal -- lines )
41 [ words>elements ] 2dip wrap [ concat ] map! ;