106 lines
2.8 KiB
Factor
106 lines
2.8 KiB
Factor
! Copyright (C) 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: gadgets
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USING: errors generic hashtables kernel lists math matrices
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namespaces sdl sequences ;
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: layout ( gadget -- )
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#! Set the gadget's width and height to its preferred width
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#! and height. The gadget's children are laid out first.
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#! Note that nothing is done if the gadget does not need to
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#! be laid out.
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dup gadget-relayout? [
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f over set-gadget-relayout?
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dup layout*
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gadget-children [ layout ] each
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] [
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drop
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] ifte ;
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TUPLE: pack align fill vector ;
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: pref-dims ( gadget -- list )
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gadget-children [ pref-dim ] map ;
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: orient ( gadget seq1 seq2 -- seq )
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>r >r pack-vector r> r> [ pick set-axis ] 2map nip ;
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: packed-dim-2 ( gadget sizes -- list )
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[
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over rect-dim { 1 1 1 } vmax over v-
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rot pack-fill v*n v+
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] map-with ;
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: (packed-dims) ( gadget sizes -- seq )
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2dup packed-dim-2 swap orient ;
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: packed-dims ( gadget sizes -- seq )
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over gadget-children >r (packed-dims) r>
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[ set-gadget-dim ] 2each ;
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: packed-loc-1 ( sizes -- seq )
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{ 0 0 0 } [ v+ ] accumulate ;
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: packed-loc-2 ( gadget sizes -- seq )
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>r dup rect-dim { 1 1 1 } vmax over r>
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packed-dim-2 [ v- ] map-with
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>r dup pack-align swap rect-dim { 1 1 1 } vmax r>
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[ >r 2dup r> v- n*v ] map 2nip ;
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: (packed-locs) ( gadget sizes -- seq )
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dup packed-loc-1 >r dupd packed-loc-2 r> orient ;
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: packed-locs ( gadget sizes -- )
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over gadget-children >r (packed-locs) r>
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[ set-rect-loc ] 2each ;
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: packed-layout ( gadget sizes -- )
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2dup packed-locs packed-dims ;
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C: pack ( align fill vector -- pack )
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#! align: 0 left aligns, 1/2 center, 1 right.
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#! gap: between each child.
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#! fill: 0 leaves default width, 1 fills to pack width.
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[ <gadget> swap set-delegate ] keep
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[ set-pack-vector ] keep
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[ set-pack-fill ] keep
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[ set-pack-align ] keep ;
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: <pile> { 0 1 0 } <pack> ;
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: <line-pile> 0 0 <pile> ;
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: <shelf> { 1 0 0 } <pack> ;
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: <line-shelf> 0 0 <shelf> ;
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M: pack pref-dim ( pack -- dim )
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[
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pref-dims
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[ { 0 0 0 } [ vmax ] reduce ] keep
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{ 0 0 0 } [ v+ ] reduce
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] keep pack-vector set-axis ;
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M: pack layout* ( pack -- ) dup pref-dims packed-layout ;
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: fast-children-on ( dim axis gadgets -- i )
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swapd [ rect-loc origin get v+ v- over v. ] binsearch nip ;
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M: pack children-on ( rect pack -- list )
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dup pack-vector swap gadget-children [
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3dup
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>r >r dup rect-loc swap rect-dim v+ r> r> fast-children-on 1 +
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>r
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>r >r rect-loc r> r> fast-children-on 0 max
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r>
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] keep <slice> ;
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TUPLE: stack ;
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C: stack ( -- gadget )
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#! A stack lays out all its children on top of each other.
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0 1 { 0 0 1 } <pack> over set-delegate ;
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M: stack children-on ( point stack -- gadget )
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nip gadget-children ;
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