! Copyright (C) 2009 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
-USING: arrays alien alien.c-types alien.syntax kernel destructors
-accessors fry words hashtables strings sequences memoize assocs math
-math.functions locals init namespaces combinators fonts colors cache
-core-foundation core-foundation.strings core-foundation.attributed-strings
-core-foundation.utilities core-graphics core-graphics.types
-core-text.fonts core-text.utilities ;
+USING: accessors alien.c-types alien.data alien.syntax arrays
+assocs cache colors combinators core-foundation
+core-foundation.attributed-strings core-foundation.strings
+core-graphics core-graphics.types core-text.fonts destructors
+fonts init io.encodings.string io.encodings.utf16 kernel locals
+make math math.functions math.order math.vectors memoize
+namespaces sequences strings ;
IN: core-text
TYPEDEF: void* CTLineRef
-C-GLOBAL: kCTFontAttributeName
-C-GLOBAL: kCTKernAttributeName
-C-GLOBAL: kCTLigatureAttributeName
-C-GLOBAL: kCTForegroundColorAttributeName
-C-GLOBAL: kCTParagraphStyleAttributeName
-C-GLOBAL: kCTUnderlineStyleAttributeName
-C-GLOBAL: kCTVerticalFormsAttributeName
-C-GLOBAL: kCTGlyphInfoAttributeName
+C-GLOBAL: CFStringRef kCTFontAttributeName
+C-GLOBAL: CFStringRef kCTKernAttributeName
+C-GLOBAL: CFStringRef kCTLigatureAttributeName
+C-GLOBAL: CFStringRef kCTForegroundColorAttributeName
+C-GLOBAL: CFStringRef kCTParagraphStyleAttributeName
+C-GLOBAL: CFStringRef kCTUnderlineStyleAttributeName
+C-GLOBAL: CFStringRef kCTVerticalFormsAttributeName
+C-GLOBAL: CFStringRef kCTGlyphInfoAttributeName
-FUNCTION: CTLineRef CTLineCreateWithAttributedString ( CFAttributedStringRef string ) ;
+FUNCTION: CTLineRef CTLineCreateWithAttributedString ( CFAttributedStringRef string )
-FUNCTION: void CTLineDraw ( CTLineRef line, CGContextRef context ) ;
+FUNCTION: void CTLineDraw ( CTLineRef line, CGContextRef context )
-FUNCTION: CGFloat CTLineGetOffsetForStringIndex ( CTLineRef line, CFIndex charIndex, CGFloat* secondaryOffset ) ;
+FUNCTION: CGFloat CTLineGetOffsetForStringIndex ( CTLineRef line, CFIndex charIndex, CGFloat* secondaryOffset )
-FUNCTION: CFIndex CTLineGetStringIndexForPosition ( CTLineRef line, CGPoint position ) ;
+FUNCTION: CFIndex CTLineGetStringIndexForPosition ( CTLineRef line, CGPoint position )
-FUNCTION: double CTLineGetTypographicBounds ( CTLineRef line, CGFloat* ascent, CGFloat* descent, CGFloat* leading ) ;
+FUNCTION: double CTLineGetTypographicBounds ( CTLineRef line, CGFloat* ascent, CGFloat* descent, CGFloat* leading )
-FUNCTION: CGRect CTLineGetImageBounds ( CTLineRef line, CGContextRef context ) ;
+FUNCTION: CGRect CTLineGetImageBounds ( CTLineRef line, CGContextRef context )
+
+SYMBOL: retina?
ERROR: not-a-string object ;
+MEMO: make-attributes ( open-font color -- hashtable )
+ [
+ kCTForegroundColorAttributeName ,,
+ kCTFontAttributeName ,,
+ ] H{ } make ;
+
: <CTLine> ( string open-font color -- line )
[
[
dup selection? [ string>> ] when
dup string? [ not-a-string ] unless
] 2dip
- [
- kCTForegroundColorAttributeName set
- kCTFontAttributeName set
- ] H{ } make-assoc <CFAttributedString> &CFRelease
+ make-attributes <CFAttributedString> &CFRelease
CTLineCreateWithAttributedString
] with-destructors ;
-TUPLE: line font line metrics image disposed ;
+TUPLE: line < disposable font string line metrics image loc dim
+render-loc render-dim ;
-: compute-line-metrics ( open-font line -- line-metrics )
- [
- [ metrics new ] dip
- [ CTFontGetCapHeight >>cap-height ]
- [ CTFontGetXHeight >>x-height ]
- bi
- ] dip
- 0 <CGFloat> 0 <CGFloat> 0 <CGFloat>
- [ CTLineGetTypographicBounds ] 3keep
+: typographic-bounds ( line -- width ascent descent leading )
+ { CGFloat CGFloat CGFloat }
+ [ CTLineGetTypographicBounds ] with-out-parameters ; inline
+
+: store-typographic-bounds ( metrics width ascent descent leading -- metrics )
{
[ >>width ]
- [ *CGFloat >>ascent ]
- [ *CGFloat >>descent ]
- [ *CGFloat >>leading ]
- } spread
- dup compute-height ;
+ [ >>ascent ]
+ [ >>descent ]
+ [ >>leading ]
+ } spread ; inline
+
+: compute-font-metrics ( metrics font -- metrics )
+ [ CTFontGetCapHeight >>cap-height ]
+ [ CTFontGetXHeight >>x-height ]
+ bi ; inline
-: bounds>dim ( bounds -- dim )
+: compute-line-metrics ( open-font line -- line-metrics )
+ [ metrics new ] 2dip
+ [ compute-font-metrics ]
+ [ typographic-bounds store-typographic-bounds ] bi*
+ compute-height ;
+
+: metrics>dim ( bounds -- dim )
[ width>> ] [ [ ascent>> ] [ descent>> ] bi + ] bi
[ ceiling >integer ]
bi@ 2array ;
bi-curry* bi ;
: selection-rect ( dim line selection -- rect )
- [ start>> ] [ end>> ] bi
+ [let [ start>> ] [ end>> ] [ string>> ] tri :> ( start end string )
+ start end [ 0 swap string subseq utf16n encode length 2 / >integer ] bi@
+ ]
[ f CTLineGetOffsetForStringIndex round ] bi-curry@ bi
[ drop nip 0 ] [ swap - swap second ] 3bi <CGRect> ;
-:: fill-selection-background ( context dim line string -- )
+: CGRect-translate-x ( CGRect x -- CGRect' )
+ [ dup CGRect-x ] dip - over set-CGRect-x ;
+
+:: fill-selection-background ( context loc dim line string -- )
string selection? [
context string color>> >rgba-components CGContextSetRGBFillColor
- context dim line string selection-rect CGContextFillRect
+ context dim line string selection-rect
+ loc first CGRect-translate-x
+ CGContextFillRect
] when ;
-: set-text-position ( context metrics -- )
- [ 0 ] dip descent>> ceiling CGContextSetTextPosition ;
+: line-rect ( line -- rect )
+ dummy-context CTLineGetImageBounds ;
+
+: set-text-position ( context loc -- )
+ first2 [ neg ] bi@ CGContextSetTextPosition ;
+
+:: line-loc ( metrics loc dim -- loc )
+ loc first
+ metrics ascent>> ceiling dim second loc second + - 2array ;
:: <line> ( font string -- line )
[
- [let* | open-font [ font cache-font CFRetain |CFRelease ]
- line [ string open-font font foreground>> <CTLine> |CFRelease ]
- metrics [ open-font line compute-line-metrics ]
- dim [ metrics bounds>dim ] |
- open-font line metrics
- dim [
- {
- [ font dim fill-background ]
- [ dim line string fill-selection-background ]
- [ metrics set-text-position ]
- [ [ line ] dip CTLineDraw ]
- } cleave
- ] make-bitmap-image
- ]
- f line boa
+ line new-disposable
+ font retina? get-global [ cache-font@2x ] [ cache-font ] if :> open-font
+ string open-font font foreground>> <CTLine> |CFRelease :> line
+ open-font line compute-line-metrics
+ [ >>metrics ] [ metrics>dim >>dim ] bi
+ font >>font
+ string >>string
+ line >>line
] with-destructors ;
-M: line dispose* [ font>> CFRelease ] [ line>> CFRelease ] bi ;
+:: render ( line -- line image )
+ line line>> :> ctline
+ line string>> :> string
+ line font>> :> font
+
+ line render-loc>> [
+
+ ctline line-rect :> rect
+ rect origin>> CGPoint>loc :> (loc)
+ rect size>> CGSize>dim :> (dim)
+ (loc) vfloor :> loc
+ (loc) (dim) v+ vceiling :> ext
+ ext loc [ - >integer 1 max ] 2map :> dim
+
+ loc line render-loc<<
+ dim line render-dim<<
+
+ line metrics>> loc dim line-loc line loc<<
+
+ ] unless
+
+ line render-loc>> :> loc
+ line render-dim>> :> dim
+
+ line dim [
+ {
+ [ font dim fill-background ]
+ [ loc dim ctline string fill-selection-background ]
+ [ loc set-text-position ]
+ [ [ ctline ] dip CTLineDraw ]
+ } cleave
+ ] make-bitmap-image retina? get-global >>2x? ;
+
+: line>image ( line -- image )
+ dup image>> [ render >>image ] unless image>> ;
+
+M: line dispose* line>> CFRelease ;
SYMBOL: cached-lines
: cached-line ( font string -- line )
- cached-lines get [ <line> ] 2cache ;
+ cached-lines get-global [ <line> ] 2cache ;
-[ <cache-assoc> cached-lines set-global ] "core-text" add-init-hook
\ No newline at end of file
+[ <cache-assoc> cached-lines set-global f retina? set-global ] "core-text" add-startup-hook
projects / factor.git / blobdiff