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Improved background rendering when selecting text, including emojis

unicode-12.1.0
KUSUMOTO Norio 2019-07-27 09:56:37 +09:00
parent 790aeb3e04
commit b429635fe2
1 changed files with 6 additions and 3 deletions
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9
basis/core-text/core-text.factor
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@ -5,7 +5,8 @@ assocs cache colors combinators core-foundation
core-foundation.attributed-strings core-foundation.strings
core-graphics core-graphics.types core-text.fonts destructors
fonts init kernel locals make math math.functions math.order
math.vectors memoize namespaces sequences strings ;
math.vectors memoize namespaces sequences strings
io.encodings.utf16n io.encodings.string ;
IN: core-text
TYPEDEF: void* CTLineRef
@ -62,7 +63,7 @@ render-loc render-dim ;
{
[ >>width ]
[ >>ascent ]
[ >>descent ]
[ dup 0 < [ -1 * ] when >>descent ]
[ >>leading ]
} spread ; inline
@ -88,7 +89,9 @@ render-loc render-dim ;
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> ;