1 ! Copyright (C) 2006 Matthew Willis. All Rights Reserved.
2 ! See http://factorcode.org/license.txt for BSD license.
4 USING: parser-combinators kernel sequences lazy-lists
5 namespaces strings arrays math io errors ;
8 LAZY: <(*)> ( parser -- parser )
9 ! kleene star matching, but take shortest match first
10 { } succeed swap dup <(*)> <&:> <|> ;
12 LAZY: <(+)> ( parser -- parser )
15 LAZY: 'consume1' ( -- parser ) [ CHAR: \n = not ] satisfy ;
17 LAZY: '\n' ( -- parser ) [ CHAR: \n = ] satisfy ;
19 : open-tag ( text -- tag ) [ CHAR: < , , CHAR: > , ] { } make ;
21 : close-tag ( text -- tag ) [ "</" , , CHAR: > , ] { } make ;
23 : both-tags ( text -- open-tag close-tag ) dup open-tag swap close-tag ;
26 LAZY: simple-tag ( start end html -- parser )
27 both-tags [ \ drop , , ] [ ] make rot token swap <@ >r
28 [ \ drop , , ] [ ] make swap token swap <@
29 'inline' <(+)> <&> r> <&> ;
31 LAZY: prefix-tag ( pre html -- parser )
32 >r 'inline' <!*> >r token r> &>
33 r> both-tags [ swap , \ swap , , \ 3array , ] [ ] make <@ ;
35 LAZY: 'strong' ( -- parser ) "*" "*" "strong" simple-tag ;
37 LAZY: 'link' ( -- parser )
38 "[" token [ drop "<a href=\"" ] <@ 'consume1' <(+)> <&>
39 "," token [ drop "\">" ] <@ <&>
40 'consume1' <(+)> <&> "]" token [ drop "</a>" ] <@ <&> ;
42 LAZY: 'inline' ( -- parser )
47 LAZY: 'h1' ( -- parser ) "=" "h1" prefix-tag ;
48 LAZY: 'h2' ( -- parser ) "==" "h2" prefix-tag ;
49 LAZY: 'h3' ( -- parser ) "===" "h3" prefix-tag ;
50 LAZY: 'h4' ( -- parser ) "====" "h4" prefix-tag ;
51 LAZY: 'h5' ( -- parser ) "=====" "h5" prefix-tag ;
52 LAZY: 'h6' ( -- parser ) "======" "h6" prefix-tag ;
54 LAZY: 'blockquote' ( -- parser ) "[\"" "\"]" "blockquote" simple-tag ;
56 LAZY: 'block' ( -- parser )
57 'h6' 'h5' 'h4' 'h3' 'h2' 'h1' <|> <|> <|> <|> <|>
59 'inline' <!+> [ "<p>" swap "</p>" 3array ] <@ <|> ;
61 LAZY: 'farkup' ( -- parser )
62 'block' '\n' <!+> 'block' <&> <!*> <&> ;
64 GENERIC: tree-write ( object -- )
66 PREDICATE: sequence non-leaf dup number? swap string? or not ;
67 M: non-leaf tree-write ( sequence -- ) [ tree-write ] each ;
69 M: string tree-write ( string -- ) write ;
71 M: number tree-write ( char -- ) write1 ;
73 : farkup ( str -- html )
74 'farkup' parse dup nil?
75 [ error ] [ car parse-result-parsed [ tree-write ] string-out ] if ;
77 ! useful debugging code below
79 : farkup-backtracks ( wiki -- backtracks )
80 ! for debugging and optimization only
81 'farkup' parse list>array length ;
83 : farkup-parsed ( wiki -- all-parses )
84 ! for debugging and optimization only
85 'farkup' parse list>array
86 [ parse-result-parsed [ tree-write ] string-out ] map ;