1 ! Copyright (C) 2006, 2007 Slava Pestov
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: arrays io kernel math models namespaces sequences strings
4 splitting io.streams.lines combinators ;
7 : +col ( loc n -- newloc ) >r first2 r> + 2array ;
9 : +line ( loc n -- newloc ) >r first2 swap r> + swap 2array ;
11 : =col ( n loc -- newloc ) first swap 2array ;
13 : =line ( n loc -- newloc ) second 2array ;
15 : lines-equal? ( loc1 loc2 -- ? ) [ first ] 2apply number= ;
17 TUPLE: document locs ;
19 : <document> ( -- document )
20 V{ "" } clone <model> V{ } clone
21 { set-delegate set-document-locs } document construct ;
23 : add-loc document-locs push ;
25 : remove-loc document-locs delete ;
27 : update-locs ( loc document -- )
28 document-locs [ set-model ] curry* each ;
30 : doc-line ( n document -- string ) model-value nth ;
32 : doc-lines ( from to document -- slice )
33 >r 1+ r> model-value <slice> ;
35 : start-on-line ( document from line# -- n1 )
36 >r dup first r> = [ nip second ] [ 2drop 0 ] if ;
38 : end-on-line ( document to line# -- n2 )
42 nip swap doc-line length
45 : each-line ( from to quot -- )
49 >r [ first ] 2apply 1+ dup <slice> r> each
52 : start/end-on-line ( from to line# -- n1 n2 )
53 tuck >r >r document get -rot start-on-line r> r>
54 document get -rot end-on-line ;
56 : (doc-range) ( from to line# -- )
57 [ start/end-on-line ] keep document get doc-line <slice> , ;
59 : doc-range ( from to document -- string )
62 >r 2dup r> (doc-range)
64 ] { } make "\n" join ;
66 : text+loc ( lines loc -- loc )
67 over >r over length 1 = [
70 first swap length 1- + 0
71 ] if r> peek length + 2array ;
73 : prepend-first ( str seq -- )
74 0 swap [ append ] change-nth ;
76 : append-last ( str seq -- )
77 [ length 1- ] keep [ swap append ] change-nth ;
79 : loc-col/str ( loc document -- str col )
80 >r first2 swap r> nth swap ;
82 : prepare-insert ( newinput from to lines -- newinput )
83 tuck loc-col/str tail-slice >r loc-col/str head-slice r>
84 pick append-last over prepend-first ;
86 : (set-doc-range) ( newlines from to lines -- )
87 [ prepare-insert ] 3keep
88 >r [ first ] 2apply 1+ r>
91 : set-doc-range ( string from to document -- )
93 >r >r >r string-lines r> [ text+loc ] 2keep r> r>
94 [ [ (set-doc-range) ] keep ] change-model
97 : remove-doc-range ( from to document -- )
98 >r >r >r "" r> r> r> set-doc-range ;
100 : last-line# ( document -- line )
101 model-value length 1- ;
103 : validate-line ( line document -- line )
104 last-line# min 0 max ;
106 : validate-col ( col line document -- col )
107 doc-line length min 0 max ;
109 : line-end ( line# document -- loc )
110 dupd doc-line length 2array ;
112 : line-end? ( loc document -- ? )
113 >r first2 swap r> doc-line length = ;
115 : doc-end ( document -- loc )
116 [ last-line# ] keep line-end ;
118 : validate-loc ( loc document -- newloc )
119 over first over model-value length >= [
125 >r first2 swap tuck r> validate-col 2array
129 : doc-string ( document -- str )
130 model-value "\n" join ;
132 : set-doc-string ( string document -- )
133 >r string-lines V{ } like r> [ set-model ] keep
134 dup doc-end swap update-locs ;
136 : clear-doc ( document -- )
137 "" swap set-doc-string ;
139 GENERIC: prev-elt ( loc document elt -- newloc )
140 GENERIC: next-elt ( loc document elt -- newloc )
142 : prev/next-elt ( loc document elt -- start end )
143 3dup next-elt >r prev-elt r> ;
145 : elt-string ( loc document elt -- string )
146 over >r prev/next-elt r> doc-range ;
150 : (prev-char) ( loc document quot -- loc )
152 { [ over { 0 0 } = ] [ drop ] }
153 { [ over second zero? ] [ >r first 1- r> line-end ] }
154 { [ t ] [ pick call ] }
157 : (next-char) ( loc document quot -- loc )
159 { [ 2dup doc-end = ] [ drop ] }
160 { [ 2dup line-end? ] [ drop first 1+ 0 2array ] }
161 { [ t ] [ pick call ] }
165 drop [ drop -1 +col ] (prev-char) ;
168 drop [ drop 1 +col ] (next-char) ;
170 : (word-elt) ( loc document quot -- loc )
172 >r >r first2 swap r> doc-line r> call
175 : ((word-elt)) [ ?nth blank? ] 2keep ;
177 : break-detector ( ? -- quot )
178 [ >r blank? r> xor ] curry ; inline
180 : (prev-word) ( ? col str -- col )
181 rot break-detector find-last*
182 drop [ 1+ ] [ 0 ] if* ;
184 : (next-word) ( ? col str -- col )
185 [ rot break-detector find* drop ] keep
186 over not [ nip length ] [ drop ] if ;
188 TUPLE: one-word-elt ;
190 M: one-word-elt prev-elt
192 [ [ f -rot >r 1- r> (prev-word) ] (word-elt) ] (prev-char) ;
194 M: one-word-elt next-elt
196 [ [ f -rot (next-word) ] (word-elt) ] (next-char) ;
202 [ [ >r 1- r> ((word-elt)) (prev-word) ] (word-elt) ]
207 [ [ ((word-elt)) (next-word) ] (word-elt) ]
210 TUPLE: one-line-elt ;
212 M: one-line-elt prev-elt
213 2drop first 0 2array ;
215 M: one-line-elt next-elt
216 drop >r first dup r> doc-line length 2array ;
221 2drop dup first zero? [ drop { 0 0 } ] [ -1 +line ] if ;
224 drop over first over last-line# number=
225 [ nip doc-end ] [ drop 1 +line ] if ;
229 M: doc-elt prev-elt 3drop { 0 0 } ;
231 M: doc-elt next-elt drop nip doc-end ;