1 ! Copyright (C) 2008 Slava Pestov.
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2 ! See http://factorcode.org/license.txt for BSD license.
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3 USING: accessors kernel models arrays sequences math math.order
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4 models.product generalizations sequences.generalizations
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6 FROM: models.product => product ;
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9 TUPLE: range < product ;
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11 : <range> ( value page min max step -- range )
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12 5 narray [ <model> ] map range new-product ;
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14 : range-model ( range -- model ) dependencies>> first ;
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15 : range-page ( range -- model ) dependencies>> second ;
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16 : range-min ( range -- model ) dependencies>> third ;
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17 : range-max ( range -- model ) dependencies>> fourth ;
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18 : range-step ( range -- model ) dependencies>> 4 swap nth ;
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20 : step-value ( value range -- value' )
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21 range-step value>> floor-to ;
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23 M: range range-value
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24 [ range-model value>> ] [ clamp-value ] [ step-value ] tri ;
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26 M: range range-page-value range-page value>> ;
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28 M: range range-min-value range-min value>> ;
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30 M: range range-max-value range-max value>> ;
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32 M: range range-max-value*
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33 [ range-max-value ] [ range-page-value ] bi [-] ;
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35 M: range set-range-value
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36 [ clamp-value ] [ range-model ] bi set-model ;
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38 M: range set-range-page-value range-page set-model ;
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40 M: range set-range-min-value range-min set-model ;
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42 M: range set-range-max-value range-max set-model ;
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44 : move-by ( amount range -- )
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45 [ range-value + ] keep set-range-value ;
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47 : move-by-page ( amount range -- )
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48 [ range-page-value * ] keep move-by ;
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