import guard from './guard' ; import ColorError from './ColorError' ; param color function parseToRgba ( color ) { if ( typeof color !== 'string' ) throw new ColorError ( color ) ; if ( color . trim ( ) . toLowerCase ( ) === 'transparent' ) return [ 0 , 0 , 0 , 0 ] ; let normalizedColor = color . trim ( ) ; normalizedColor = namedColorRegex . test ( color ) ? nameToHex ( color ) : color ; const reducedHexMatch = reducedHexRegex . exec ( normalizedColor ) ; if ( reducedHexMatch ) { const arr = Array . from ( reducedHexMatch ) . slice ( 1 ) ; return [ ... arr . slice ( 0 , 3 ) . map ( ( x ) => parseInt ( r ( x , 2 ) , 16 ) ) , parseInt ( r ( arr [ 3 ] || 'f' , 2 ) , 16 ) / 255 , ] as [ number , number , number , number ] ; } const hexMatch = hexRegex . exec ( normalizedColor ) ; if ( hexMatch ) { const arr = Array . from ( hexMatch ) . slice ( 1 ) ; return [ ... arr . slice ( 0 , 3 ) . map ( ( x ) => parseInt ( x , 16 ) ) , parseInt ( arr [ 3 ] || 'ff' , 16 ) / 255 , ] as [ number , number , number , number ] ; } const rgbaMatch = rgbaRegex . exec ( normalizedColor ) ; if ( rgbaMatch ) { const arr = Array . from ( rgbaMatch ) . slice ( 1 ) ; return [ ... arr . slice ( 0 , 3 ) . map ( ( x ) => parseInt ( x , 10 ) ) , parseFloat ( arr [ 3 ] || '1' ) , ] as [ number , number , number , number ] ; } const hslaMatch = hslaRegex . exec ( normalizedColor ) ; if ( hslaMatch ) { const [ h , s , l , a ] = Array . from ( hslaMatch ) . slice ( 1 ) . map ( parseFloat ) ; if ( guard ( 0 , 100 , s ) !== s ) throw new ColorError ( color ) ; if ( guard ( 0 , 100 , l ) !== l ) throw new ColorError ( color ) ; return [ ... hslToRgb ( h , s , l ) , a || 1 ] as [ number , number , number , number ] ; } throw new ColorError ( color ) ; } function hash ( str ) { let hash = 5381 ; let i = str . length ; while ( i ) { hash = ( hash * 33 ) ^ str . charCodeAt ( -- i ) ; } return ( hash >>> 0 ) % 2341 ; } const colorToInt = ( x ) => parseInt ( x . replace ( /_/g , '' ) , 36 ) ; const compressedColorMap = '1q29ehhb 1n09sgk7 1kl1ekf_ _yl4zsno 16z9eiv3 1p29lhp8 _bd9zg04 17u0____ _iw9zhe5 _to73___ _r45e31e _7l6g016 _jh8ouiv _zn3qba8 1jy4zshs 11u87k0u 1ro9yvyo 1aj3xael 1gz9zjz0 _3w8l4xo 1bf1ekf_ _ke3v___ _4rrkb__ 13j776yz _646mbhl _nrjr4__ _le6mbhl 1n37ehkb _m75f91n _qj3bzfz 1939yygw 11i5z6x8 _1k5f8xs 1509441m 15t5lwgf _ae2th1n _tg1ugcv 1lp1ugcv 16e14up_ _h55rw7n _ny9yavn _7a11xb_ 1ih442g9 _pv442g9 1mv16xof 14e6y7tu 1oo9zkds 17d1cisi _4v9y70f _y98m8kc 1019pq0v 12o9zda8 _348j4f4 1et50i2o _8epa8__ _ts6senj 1o350i2o 1mi9eiuo 1259yrp0 1ln80gnw _632xcoy 1cn9zldc _f29edu4 1n490c8q _9f9ziet 1b94vk74 _m49zkct 1kz6s73a 1eu9dtog _q58s1rz 1dy9sjiq __u89jo3 _aj5nkwg _ld89jo3 13h9z6wx _qa9z2ii _l119xgq _bs5arju 1hj4nwk9 1qt4nwk9 1ge6wau6 14j9zlcw 11p1edc_ _ms1zcxe _439shk6 _jt9y70f _754zsow 1la40eju _oq5p___ _x279qkz 1fa5r3rv _yd2d9ip _424tcku _8y1di2_ _zi2uabw _yy7rn9h 12yz980_ __39ljp6 1b59zg0x _n39zfzp 1fy9zest _b33k___ _hp9wq92 1il50hz4 _io472ub _lj9z3eo 19z9ykg0 _8t8iu3a 12b9bl4a 1ak5yw0o _896v4ku _tb8k8lv _s59zi6t _c09ze0p 1lg80oqn 1id9z8wb _238nba5 1kq6wgdi _154zssg _tn3zk49 _da9y6tc 1sg7cv4f _r12jvtt 1gq5fmkz 1cs9rvci _lp9jn1c _xw1tdnb 13f9zje6 16f6973h _vo7ir40 _bt5arjf _rc45e4t _hr4e100 10v4e100 _hc9zke2 _w91egv_ _sj2r1kk 13c87yx8 _vqpds__ _ni8ggk8 _tj9yqfb 1ia2j4r4 _7x9b10u 1fc9ld4j 1eq9zldr _5j9lhpx _ez9zl6o _md61fzm' . split ( ' ' ) . reduce ( ( acc , next ) => { const key = colorToInt ( next . substring ( 0 , 3 ) ) ; const hex = colorToInt ( next . substring ( 3 ) ) . toString ( 16 ) ; let prefix = '' ; for ( let i = 0 ; i < 6 - hex . length ; i ++ ) { prefix += '0' ; } acc [ key ] = `${ prefix }${ hex }` ; return acc ; } , { } as { [ key ] : string ; } ) ; /**
 * Checks if a string is a CSS named color and returns its equivalent hex value, otherwise returns the original color.
 */ function nameToHex ( color ) { const normalizedColorName = color . toLowerCase ( ) . trim ( ) ; const result = compressedColorMap [ hash ( normalizedColorName ) ] ; if ( ! result ) throw new ColorError ( color ) ; return `#${ result }` ; } const r = ( str , amount ) => Array . from ( Array ( amount ) ) . map ( ( ) => str ) . join ( '' ) ; const reducedHexRegex = new RegExp ( `^#${ r ( '([a-f0-9])' , 3 ) }([a-f0-9])?$` , 'i' ) ; const hexRegex = new RegExp ( `^#${ r ( '([a-f0-9]{2})' , 3 ) }([a-f0-9]{2})?$` , 'i' ) ; const rgbaRegex = new RegExp ( `^rgba?\\(\\s*(\\d+)\\s*${ r ( ',\\s*(\\d+)\\s*' , 2 ) }(?:,\\s*([\\d.]+))?\\s*\\)$` , 'i' ) ; const hslaRegex = /^hsla?\(\s*([\d.]+)\s*,\s*([\d.]+)%\s*,\s*([\d.]+)%(?:\s*,\s*([\d.]+))?\s*\)$/i ; const namedColorRegex = /^[a-z]+$/i ; const roundColor = ( color ) : number => { return Math . round ( color * 255 ) ; } ; const hslToRgb = ( hue , saturation , lightness ) : [ number , number , number ] => { let l = lightness / 100 ; if ( saturation === 0 ) { return [ l , l , l ] . map ( roundColor ) as [ number , number , number ] ; } const huePrime = ( ( ( hue % 360 ) + 360 ) % 360 ) / 60 ; const chroma = ( 1 - Math . abs ( 2 * l - 1 ) ) * ( saturation / 100 ) ; const secondComponent = chroma * ( 1 - Math . abs ( ( huePrime % 2 ) - 1 ) ) ; let red = 0 ; let green = 0 ; let blue = 0 ; if ( huePrime >= 0 && huePrime < 1 ) { red = chroma ; green = secondComponent ; } else if ( huePrime >= 1 && huePrime < 2 ) { red = secondComponent ; green = chroma ; } else if ( huePrime >= 2 && huePrime < 3 ) { green = chroma ; blue = secondComponent ; } else if ( huePrime >= 3 && huePrime < 4 ) { green = secondComponent ; blue = chroma ; } else if ( huePrime >= 4 && huePrime < 5 ) { red = secondComponent ; blue = chroma ; } else if ( huePrime >= 5 && huePrime < 6 ) { red = chroma ; blue = secondComponent ; } const lightnessModification = l - chroma / 2 ; const finalRed = red + lightnessModification ; const finalGreen = green + lightnessModification ; const finalBlue = blue + lightnessModification ; return [ finalRed , finalGreen , finalBlue ] . map ( roundColor ) as [ number , number , number ] ; } ; export default parseToRgba ;