101 lines
2.7 KiB
Factor
101 lines
2.7 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: generic kernel line-editor lists math namespaces sdl
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sequences strings ;
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! An editor gadget wraps a line editor object and passes
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! gestures to the line editor.
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TUPLE: editor line caret ;
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: editor-text ( editor -- text )
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editor-line [ line-text get ] bind ;
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: set-editor-text ( text editor -- )
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editor-line [ set-line-text ] bind ;
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: focus-editor ( editor -- )
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dup editor-caret swap add-gadget ;
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: unfocus-editor ( editor -- )
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editor-caret unparent ;
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: with-editor ( editor quot -- )
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#! Execute a quotation in the line editor scope, then
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#! update the display.
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swap [ editor-line swap bind ] keep relayout ; inline
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: run-char-widths ( str -- wlist )
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#! List of x co-ordinates of each character.
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0 swap >list
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[ ch>string shape-w [ + dup ] keep 2 /i - ] map nip ;
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: (x>offset) ( n x wlist -- offset )
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dup [
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uncons >r over > [
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r> 2drop
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] [
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>r 1 + r> r> (x>offset)
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] ifte
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] [
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2drop
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] ifte ;
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: x>offset ( x str -- offset )
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0 -rot run-char-widths (x>offset) ;
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: set-caret-x ( x editor -- )
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#! Move the caret to a clicked location.
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[ line-text get x>offset caret set ] with-editor ;
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: click-editor ( editor -- )
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hand
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2dup relative shape-x pick set-caret-x
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request-focus ;
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: editor-actions ( editor -- )
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[
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[[ [ gain-focus ] [ focus-editor ] ]]
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[[ [ lose-focus ] [ unfocus-editor ] ]]
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[[ [ button-down 1 ] [ click-editor ] ]]
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[[ [ "BACKSPACE" ] [ [ backspace ] with-editor ] ]]
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[[ [ "LEFT" ] [ [ left ] with-editor ] ]]
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[[ [ "RIGHT" ] [ [ right ] with-editor ] ]]
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[[ [ "CTRL" "k" ] [ [ line-clear ] with-editor ] ]]
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] swap add-actions ;
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: <caret> ( -- caret )
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0 0 0 0 <plain-rect> <gadget>
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dup red background set-paint-prop ;
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C: editor ( text -- )
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<empty-gadget> over set-delegate
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[ <line-editor> swap set-editor-line ] keep
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[ <caret> swap set-editor-caret ] keep
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[ set-editor-text ] keep
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dup editor-actions ;
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: offset>x ( offset str -- x )
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string-head font get swap size-string drop ;
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: caret-pos ( editor -- x y )
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editor-line [ caret get line-text get ] bind offset>x 0 ;
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: caret-size ( editor -- w h )
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1 swap shape-h ;
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M: editor user-input* ( ch editor -- ? )
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[ [ insert-char ] with-editor ] keep
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scroll>bottom t ;
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M: editor pref-size ( editor -- w h )
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editor-text shape-size >r 1 + r> ;
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M: editor layout* ( editor -- )
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dup editor-caret over caret-size rot resize-gadget
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dup editor-caret swap caret-pos rot move-gadget ;
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M: editor draw-shape ( editor -- )
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dup [ editor-text draw-shape ] with-trans ;
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