106 lines
4.7 KiB
Factor
106 lines
4.7 KiB
Factor
USING: accessors arrays kernel models models.product monads
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sequences sequences.extras shuffle ;
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FROM: syntax => >> ;
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IN: models.combinators
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TUPLE: multi-model < model important? ;
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GENERIC: (model-changed) ( model observer -- )
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: <multi-model> ( models kind -- model ) f swap new-model [ [ add-dependency ] curry each ] keep ;
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M: multi-model model-changed over value>> [ (model-changed) ] [ 2drop ] if ;
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M: multi-model model-activated dup dependencies>> [ value>> ] find nip
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[ swap model-changed ] [ drop ] if* ;
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: #1 ( model -- model' ) t >>important? ;
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IN: models
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: notify-connections ( model -- )
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dup connections>> dup [ dup multi-model? [ important?>> ] [ drop f ] if ] find-all
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[ second tuck [ remove ] dip prefix ] each
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[ model-changed ] with each ;
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IN: models.combinators
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TUPLE: basic-model < multi-model ;
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M: basic-model (model-changed) [ value>> ] dip set-model ;
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: merge ( models -- model ) basic-model <multi-model> ;
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: 2merge ( model1 model2 -- model ) 2array merge ;
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: <basic> ( value -- model ) basic-model new-model ;
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TUPLE: filter-model < multi-model quot ;
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M: filter-model (model-changed) [ value>> ] dip 2dup quot>> call( a -- ? )
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[ set-model ] [ 2drop ] if ;
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: filter-model ( model quot -- filter-model ) [ 1array \ filter-model <multi-model> ] dip >>quot ;
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TUPLE: fold-model < multi-model quot base values ;
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M: fold-model (model-changed) 2dup base>> =
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[ [ [ value>> ] [ [ values>> ] [ quot>> ] bi ] bi* swapd reduce* ] keep set-model ]
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[ [ [ value>> ] [ values>> ] bi* push ]
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[ [ [ value>> ] [ [ value>> ] [ quot>> ] bi ] bi* call( val oldval -- newval ) ] keep set-model ] 2bi
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] if ;
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M: fold-model model-activated drop ;
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: new-fold-model ( deps -- model ) fold-model <multi-model> V{ } clone >>values ;
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: fold ( model oldval quot -- model ) rot 1array new-fold-model swap >>quot
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swap >>value ;
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: fold* ( model oldmodel quot -- model ) over [ [ 2array new-fold-model ] dip >>quot ]
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dip [ >>base ] [ value>> >>value ] bi ;
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TUPLE: updater-model < multi-model values updates ;
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M: updater-model (model-changed) [ tuck updates>> =
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[ [ values>> value>> ] keep set-model ]
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[ drop ] if ] keep f swap (>>value) ;
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: updates ( values updates -- model ) [ 2array updater-model <multi-model> ] 2keep
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[ >>values ] [ >>updates ] bi* ;
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SYMBOL: switch
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TUPLE: switch-model < multi-model original switcher on ;
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M: switch-model (model-changed) 2dup switcher>> =
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[ [ value>> ] dip over switch = [ nip [ original>> ] keep f >>on model-changed ] [ t >>on set-model ] if ]
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[ dup on>> [ 2drop ] [ [ value>> ] dip over [ set-model ] [ 2drop ] if ] if ] if ;
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: switch-models ( model1 model2 -- model' ) swap [ 2array switch-model <multi-model> ] 2keep
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[ [ value>> >>value ] [ >>original ] bi ] [ >>switcher ] bi* ;
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M: switch-model model-activated [ original>> ] keep model-changed ;
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: >behavior ( event -- behavior ) t >>value ;
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TUPLE: mapped-model < multi-model model quot ;
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: new-mapped-model ( model quot class -- mapped-model ) [ over 1array ] dip
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<multi-model> swap >>quot swap >>model ;
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: <mapped> ( model quot -- model ) mapped-model new-mapped-model ;
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M: mapped-model (model-changed)
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[ [ value>> ] [ quot>> ] bi* call( old -- new ) ] [ nip ] 2bi
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set-model ;
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TUPLE: side-effect-model < mapped-model ;
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M: side-effect-model (model-changed) [ value>> ] dip [ quot>> call( old -- ) ] 2keep set-model ;
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TUPLE: quot-model < mapped-model ;
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M: quot-model (model-changed) nip [ quot>> call( -- b ) ] keep set-model ;
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TUPLE: action-value < basic-model parent ;
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: <action-value> ( parent value -- model ) action-value new-model swap >>parent ;
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M: action-value model-activated dup parent>> dup activate-model model-changed ; ! a fake dependency of sorts
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TUPLE: action < multi-model quot ;
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M: action (model-changed) [ [ value>> ] [ quot>> ] bi* call( a -- b ) ] keep value>>
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[ swap add-connection ] 2keep model-changed ;
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: <action> ( model quot -- action-model ) [ 1array action <multi-model> ] dip >>quot dup f <action-value> >>value value>> ;
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TUPLE: collection < multi-model ;
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: <collection> ( models -- product ) collection <multi-model> ;
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M: collection (model-changed)
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nip
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dup dependencies>> [ value>> ] all?
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[ dup [ value>> ] product-value swap set-model ]
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[ drop ] if ;
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M: collection model-activated dup (model-changed) ;
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! for side effects
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TUPLE: (when-model) < multi-model quot cond ;
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: when-model ( model quot cond -- model ) rot 1array (when-model) <multi-model> swap >>cond swap >>quot ;
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M: (when-model) (model-changed) [ quot>> ] 2keep
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[ value>> ] [ cond>> ] bi* call( a -- ? ) [ call( model -- ) ] [ 2drop ] if ;
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! only used in construction
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: with-self ( quot: ( model -- model ) -- model ) [ f <basic> dup ] dip call swap [ add-dependency ] keep ; inline
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USE: models.combinators.templates
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<< { "$>" "<$" "fmap" } [ fmaps ] each >>
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