1 USING: accessors arrays kernel models models.product monads
2 sequences sequences.extras ;
6 TUPLE: multi-model < model important? ;
7 GENERIC: (model-changed) ( model observer -- )
8 : <multi-model> ( models kind -- model ) f swap new-model [ [ add-dependency ] curry each ] keep ;
9 M: multi-model model-changed over value>> [ (model-changed) ] [ 2drop ] if ;
10 M: multi-model model-activated dup dependencies>> [ value>> ] find nip
11 [ swap model-changed ] [ drop ] if* ;
13 : #1 ( model -- model' ) t >>important? ;
16 : notify-connections ( model -- )
17 dup connections>> dup [ dup multi-model? [ important?>> ] [ drop f ] if ] find-all
18 [ second tuck [ remove ] dip prefix ] each
19 [ model-changed ] with each ;
22 TUPLE: basic-model < multi-model ;
23 M: basic-model (model-changed) [ value>> ] dip set-model ;
24 : <merge> ( models -- signal ) basic-model <multi-model> ;
25 : <2merge> ( model1 model2 -- signal ) 2array <merge> ;
26 : <basic> ( value -- signal ) basic-model new-model ;
28 TUPLE: filter-model < multi-model quot ;
29 M: filter-model (model-changed) [ value>> ] dip 2dup quot>> call( a -- ? )
30 [ set-model ] [ 2drop ] if ;
31 : <filter> ( model quot -- filter-signal ) [ 1array filter-model <multi-model> ] dip >>quot ;
33 TUPLE: fold-model < multi-model quot base values ;
34 M: fold-model (model-changed) 2dup base>> =
35 [ [ [ value>> ] [ [ values>> ] [ quot>> ] bi ] bi* swapd reduce* ] keep set-model ]
36 [ [ [ value>> ] [ values>> ] bi* push ]
37 [ [ [ value>> ] [ [ value>> ] [ quot>> ] bi ] bi* call( val oldval -- newval ) ] keep set-model ] 2bi
39 M: fold-model model-activated drop ;
40 : new-fold-model ( deps -- model ) fold-model <multi-model> V{ } clone >>values ;
41 : <fold> ( model oldval quot -- signal ) rot 1array new-fold-model swap >>quot
43 : <fold*> ( model oldmodel quot -- signal ) over [ [ 2array new-fold-model ] dip >>quot ]
44 dip [ >>base ] [ value>> >>value ] bi ;
46 TUPLE: updater-model < multi-model values updates ;
47 M: updater-model (model-changed) [ tuck updates>> =
48 [ [ values>> value>> ] keep set-model ]
49 [ drop ] if ] keep f swap (>>value) ;
50 : <updates> ( values updates -- signal ) [ 2array updater-model <multi-model> ] 2keep
51 [ >>values ] [ >>updates ] bi* ;
54 TUPLE: switch-model < multi-model original switcher on ;
55 M: switch-model (model-changed) 2dup switcher>> =
56 [ [ value>> ] dip over switch = [ nip [ original>> ] keep f >>on model-changed ] [ t >>on set-model ] if ]
57 [ dup on>> [ 2drop ] [ [ value>> ] dip over [ set-model ] [ 2drop ] if ] if ] if ;
58 : <switch> ( signal1 signal2 -- signal' ) swap [ 2array switch-model <multi-model> ] 2keep
59 [ [ value>> >>value ] [ >>original ] bi ] [ >>switcher ] bi* ;
60 M: switch-model model-activated [ original>> ] keep model-changed ;
61 : >behavior ( event -- behavior ) t >>value ;
63 TUPLE: mapped-model < multi-model model quot ;
64 : new-mapped-model ( model quot class -- mapped-model ) [ over 1array ] dip
65 <multi-model> swap >>quot swap >>model ;
66 : <mapped> ( model quot -- signal ) mapped-model new-mapped-model ;
67 M: mapped-model (model-changed)
68 [ [ value>> ] [ quot>> ] bi* call( old -- new ) ] [ nip ] 2bi
71 TUPLE: side-effect-model < mapped-model ;
72 M: side-effect-model (model-changed) [ value>> ] dip [ quot>> call( old -- ) ] 2keep set-model ;
74 : $> ( model quot -- signal ) side-effect-model new-mapped-model ;
76 TUPLE: quot-model < mapped-model ;
77 M: quot-model (model-changed) nip [ quot>> call( -- b ) ] keep set-model ;
78 M: model <$ quot-model new-mapped-model ;
80 TUPLE: action-value < basic-model parent ;
81 : <action-value> ( parent value -- model ) action-value new-model swap >>parent ;
82 M: action-value model-activated dup parent>> dup activate-model model-changed ; ! a fake dependency of sorts
84 TUPLE: action < multi-model quot ;
85 M: action (model-changed) [ [ value>> ] [ quot>> ] bi* call( a -- b ) ] keep value>>
86 [ swap add-connection ] 2keep model-changed ;
87 : <action> ( model quot -- action-signal ) [ 1array action <multi-model> ] dip >>quot dup f <action-value> >>value value>> ;
89 TUPLE: collection < multi-model ;
90 : <collection> ( models -- product ) collection <multi-model> ;
91 M: collection (model-changed)
93 dup dependencies>> [ value>> ] all?
94 [ dup [ value>> ] product-value swap set-model ]
96 M: collection model-activated dup (model-changed) ;
99 TUPLE: (frp-when) < multi-model quot cond ;
100 : frp-when ( model quot cond -- model ) rot 1array (frp-when) <multi-model> swap >>cond swap >>quot ;
101 M: (frp-when) (model-changed) [ quot>> ] 2keep
102 [ value>> ] [ cond>> ] bi* call( a -- ? ) [ call( model -- ) ] [ 2drop ] if ;
104 ! only used in construction
105 : with-self ( quot: ( model -- model ) -- model ) [ f <basic> dup ] dip call swap [ add-dependency ] keep ; inline
107 USE: ui.frp.signals.templates
108 M: model fmap <mapped> ;
109 << { "$>" "<$" "fmap" } [ fmaps ] each >>