1 ! Copyright (C) 2006, 2007 Slava Pestov
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays io kernel math models namespaces make
4 sequences strings splitting combinators unicode.categories
8 : +col ( loc n -- newloc ) >r first2 r> + 2array ;
10 : +line ( loc n -- newloc ) >r first2 swap r> + swap 2array ;
12 : =col ( n loc -- newloc ) first swap 2array ;
14 : =line ( n loc -- newloc ) second 2array ;
16 : lines-equal? ( loc1 loc2 -- ? ) [ first ] bi@ number= ;
18 TUPLE: document < model locs ;
20 : <document> ( -- document )
21 V{ "" } clone document new-model
24 : add-loc ( loc document -- ) locs>> push ;
26 : remove-loc ( loc document -- ) locs>> delete ;
28 : update-locs ( loc document -- )
29 locs>> [ set-model ] with each ;
31 : doc-line ( n document -- string ) value>> nth ;
33 : doc-lines ( from to document -- slice )
34 >r 1+ r> value>> <slice> ;
36 : start-on-line ( document from line# -- n1 )
37 >r dup first r> = [ nip second ] [ 2drop 0 ] if ;
39 : end-on-line ( document to line# -- n2 )
43 nip swap doc-line length
46 : each-line ( from to quot -- )
50 >r [ first ] bi@ 1+ dup <slice> r> each
53 : start/end-on-line ( from to line# -- n1 n2 )
54 tuck >r >r document get -rot start-on-line r> r>
55 document get -rot end-on-line ;
57 : (doc-range) ( from to line# -- )
58 [ start/end-on-line ] keep document get doc-line <slice> , ;
60 : doc-range ( from to document -- string )
63 >r 2dup r> (doc-range)
65 ] { } make "\n" join ;
67 : text+loc ( lines loc -- loc )
68 over >r over length 1 = [
71 first swap length 1- + 0
72 ] if r> peek length + 2array ;
74 : prepend-first ( str seq -- )
75 0 swap [ append ] change-nth ;
77 : append-last ( str seq -- )
78 [ length 1- ] keep [ prepend ] change-nth ;
80 : loc-col/str ( loc document -- str col )
81 >r first2 swap r> nth swap ;
83 : prepare-insert ( newinput from to lines -- newinput )
84 tuck loc-col/str tail-slice >r loc-col/str head-slice r>
85 pick append-last over prepend-first ;
87 : (set-doc-range) ( newlines from to lines -- )
88 [ prepare-insert ] 3keep
89 >r [ first ] bi@ 1+ r>
92 : set-doc-range ( string from to document -- )
94 >r >r >r string-lines r> [ text+loc ] 2keep r> r>
95 [ [ (set-doc-range) ] keep ] change-model
98 : remove-doc-range ( from to document -- )
99 >r >r >r "" r> r> r> set-doc-range ;
101 : last-line# ( document -- line )
104 : validate-line ( line document -- line )
105 last-line# min 0 max ;
107 : validate-col ( col line document -- col )
108 doc-line length min 0 max ;
110 : line-end ( line# document -- loc )
111 dupd doc-line length 2array ;
113 : line-end? ( loc document -- ? )
114 >r first2 swap r> doc-line length = ;
116 : doc-end ( document -- loc )
117 [ last-line# ] keep line-end ;
119 : validate-loc ( loc document -- newloc )
120 over first over value>> length >= [
126 >r first2 swap tuck r> validate-col 2array
130 : doc-string ( document -- str )
133 : set-doc-string ( string document -- )
134 >r string-lines V{ } like r> [ set-model ] keep
135 [ doc-end ] [ update-locs ] bi ;
137 : clear-doc ( document -- )
138 "" swap set-doc-string ;
140 GENERIC: prev-elt ( loc document elt -- newloc )
141 GENERIC: next-elt ( loc document elt -- newloc )
143 : prev/next-elt ( loc document elt -- start end )
144 3dup next-elt >r prev-elt r> ;
146 : elt-string ( loc document elt -- string )
147 over >r prev/next-elt r> doc-range ;
151 : (prev-char) ( loc document quot -- loc )
153 { [ over { 0 0 } = ] [ drop ] }
154 { [ over second zero? ] [ >r first 1- r> line-end ] }
158 : (next-char) ( loc document quot -- loc )
160 { [ 2dup doc-end = ] [ drop ] }
161 { [ 2dup line-end? ] [ drop first 1+ 0 2array ] }
166 drop [ drop -1 +col ] (prev-char) ;
169 drop [ drop 1 +col ] (next-char) ;
171 TUPLE: one-char-elt ;
173 M: one-char-elt prev-elt 2drop ;
175 M: one-char-elt next-elt 2drop ;
177 : (word-elt) ( loc document quot -- loc )
179 >r >r first2 swap r> doc-line r> call
182 : ((word-elt)) ( n seq -- ? n seq ) [ ?nth blank? ] 2keep ;
184 : break-detector ( ? -- quot )
185 [ >r blank? r> xor ] curry ; inline
187 : (prev-word) ( ? col str -- col )
188 rot break-detector find-last-from drop ?1+ ;
190 : (next-word) ( ? col str -- col )
191 [ rot break-detector find-from drop ] keep
192 over not [ nip length ] [ drop ] if ;
194 TUPLE: one-word-elt ;
196 M: one-word-elt prev-elt
198 [ f -rot >r 1- r> (prev-word) ] (word-elt) ;
200 M: one-word-elt next-elt
202 [ f -rot (next-word) ] (word-elt) ;
208 [ [ >r 1- r> ((word-elt)) (prev-word) ] (word-elt) ]
213 [ [ ((word-elt)) (next-word) ] (word-elt) ]
216 TUPLE: one-line-elt ;
218 M: one-line-elt prev-elt
219 2drop first 0 2array ;
221 M: one-line-elt next-elt
222 drop >r first dup r> doc-line length 2array ;
227 2drop dup first zero? [ drop { 0 0 } ] [ -1 +line ] if ;
230 drop over first over last-line# number=
231 [ nip doc-end ] [ drop 1 +line ] if ;
235 M: doc-elt prev-elt 3drop { 0 0 } ;
237 M: doc-elt next-elt drop nip doc-end ;