115 lines
2.7 KiB
Factor
115 lines
2.7 KiB
Factor
! Copyright (C) 2006, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors generic kernel math sequences arrays assocs
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alarms calendar math.order ;
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IN: models
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TUPLE: model < identity-tuple
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value connections dependencies ref locked? ;
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: new-model ( value class -- model )
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new
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swap >>value
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V{ } clone >>connections
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V{ } clone >>dependencies
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0 >>ref ; inline
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: <model> ( value -- model )
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model new-model ;
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M: model hashcode* drop model hashcode* ;
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: add-dependency ( dep model -- )
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dependencies>> push ;
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: remove-dependency ( dep model -- )
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dependencies>> delete ;
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DEFER: add-connection
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GENERIC: model-activated ( model -- )
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M: model model-activated drop ;
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: ref-model ( model -- n )
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[ 1+ ] change-ref ref>> ;
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: unref-model ( model -- n )
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[ 1- ] change-ref ref>> ;
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: activate-model ( model -- )
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dup ref-model 1 = [
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dup dependencies>>
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[ dup activate-model dupd add-connection ] each
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model-activated
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] [
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drop
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] if ;
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DEFER: remove-connection
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: deactivate-model ( model -- )
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dup unref-model zero? [
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dup dependencies>>
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[ dup deactivate-model remove-connection ] with each
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] [
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drop
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] if ;
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GENERIC: model-changed ( model observer -- )
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: add-connection ( observer model -- )
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dup connections>> empty? [ dup activate-model ] when
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connections>> push ;
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: remove-connection ( observer model -- )
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[ connections>> delete ] keep
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dup connections>> empty? [ dup deactivate-model ] when
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drop ;
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: with-locked-model ( model quot -- )
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swap
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t >>locked?
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slip
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f >>locked? drop ; inline
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GENERIC: update-model ( model -- )
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M: model update-model drop ;
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: notify-connections ( model -- )
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dup connections>> [ model-changed ] with each ;
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: set-model ( value model -- )
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dup locked?>> [
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2drop
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] [
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dup [
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swap >>value
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[ update-model ] [ notify-connections ] bi
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] with-locked-model
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] if ;
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: ((change-model)) ( model quot -- newvalue model )
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over >r >r value>> r> call r> ; inline
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: change-model ( model quot -- )
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((change-model)) set-model ; inline
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: (change-model) ( model quot -- )
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((change-model)) (>>value) ; inline
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GENERIC: range-value ( model -- value )
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GENERIC: range-page-value ( model -- value )
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GENERIC: range-min-value ( model -- value )
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GENERIC: range-max-value ( model -- value )
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GENERIC: range-max-value* ( model -- value )
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GENERIC: set-range-value ( value model -- )
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GENERIC: set-range-page-value ( value model -- )
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GENERIC: set-range-min-value ( value model -- )
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GENERIC: set-range-max-value ( value model -- )
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: clamp-value ( value range -- newvalue )
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[ range-min-value max ] keep
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range-max-value* min ;
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