import type { IObjectOf } from "@thi.ng/api" ; import { illegalState } from "@thi.ng/errors/illegal-state" ; import { rad } from "@thi.ng/math/angle" ; import { WS } from "@thi.ng/strings/groups" ; import type { Vec } from "@thi.ng/vectors" ; import { PathBuilder } from "./path-builder.js" ; const CMD_RE = /[achlmqstvz]/i ; const WSC = { ... WS , "," : true } ; export const pathFromSvg = ( svg ) => { const b = new PathBuilder ( ) ; try { let cmd = "" ; for ( let n = svg . length , i = 0 ; i < n ; ) { i = skipWS ( svg , i ) ; const c = svg . charAt ( i ) ; if ( CMD_RE . test ( c ) ) { cmd = c ; i ++ ; } let p , pa , pb , t1 , t2 , t3 ; switch ( cmd . toLowerCase ( ) ) { case "m" : [ p , i ] = readPoint ( svg , i ) ; b . moveTo ( p , cmd === "m" ) ; break ; case "l" : [ p , i ] = readPoint ( svg , i ) ; b . lineTo ( p , cmd === "l" ) ; break ; case "h" : [ p , i ] = readFloat ( svg , i ) ; b . hlineTo ( p , cmd === "h" ) ; break ; case "v" : [ p , i ] = readFloat ( svg , i ) ; b . vlineTo ( p , cmd === "v" ) ; break ; case "q" : [ pa , i ] = readPoint ( svg , i ) ; [ p , i ] = readPoint ( svg , i ) ; b . quadraticTo ( pa , p , cmd === "q" ) ; break ; case "c" : [ pa , i ] = readPoint ( svg , i ) ; [ pb , i ] = readPoint ( svg , i ) ; [ p , i ] = readPoint ( svg , i ) ; b . cubicTo ( pa , pb , p , cmd === "c" ) ; break ; case "s" : [ pa , i ] = readPoint ( svg , i ) ; [ p , i ] = readPoint ( svg , i ) ; b . cubicChainTo ( pa , p , cmd === "s" ) ; break ; case "t" : [ p , i ] = readPoint ( svg , i ) ; b . quadraticChainTo ( p , cmd === "t" ) ; break ; case "a" : { [ pa , i ] = readPoint ( svg , i ) ; [ t1 , i ] = readFloat ( svg , i ) ; [ t2 , i ] = readFlag ( svg , i ) ; [ t3 , i ] = readFlag ( svg , i ) ; [ pb , i ] = readPoint ( svg , i ) ; b . arcTo ( pb , pa , rad ( t1 ) , t2 , t3 , cmd === "a" ) ; break ; } case "z" : b . closePath ( ) ; break ; default : throw new Error ( `unsupported segment type: ${ c } @ pos ${ i }` ) ; } } return b . paths ; } catch ( e ) { throw e instanceof Error ? e : new Error ( `illegal char '${ svg . charAt ( < number > e ) }' @ ${ e }` ) ; } } ; const skipWS = ( src , i ) => { const n = src . length ; while ( i < n && WSC [ src . charAt ( i ) ] ) i ++ ; return i ; } ; const readPoint = ( src , index ) : [ Vec , number ] => { let x , y ; [ x , index ] = readFloat ( src , index ) ; index = skipWS ( src , index ) ; [ y , index ] = readFloat ( src , index ) ; return [ [ x , y ] , index ] ; } ; const readFlag = ( src , i ) : [ boolean , number ] => { i = skipWS ( src , i ) ; const c = src . charAt ( i ) ; return [ c === "0" ? false : c === "1" ? true : illegalState ( `expected '0' or '1' @ pos: ${ i }` ) , i + 1 , ] ; } ; const readFloat = ( src , index ) => { index = skipWS ( src , index ) ; let signOk = true ; let dotOk = true ; let expOk = false ; let commaOk = false ; let i = index ; for ( let n = src . length ; i < n ; i ++ ) { const c = src . charAt ( i ) ; if ( "0" <= c && c <= "9" ) { expOk = true ; commaOk = true ; signOk = false ; continue ; } if ( c === "-" || c === "+" ) { if ( ! signOk ) break ; signOk = false ; continue ; } if ( c === "." ) { if ( ! dotOk ) break ; dotOk = false ; continue ; } if ( c === "e" ) { if ( ! expOk ) throw i ; expOk = false ; dotOk = false ; signOk = true ; continue ; } if ( c === "," ) { if ( ! commaOk ) throw i ; i ++ ; } break ; } if ( i === index ) { illegalState ( `expected coordinate @ pos: ${ i }` ) ; } return [ parseFloat ( src . substring ( index , i ) ) , i ] ; } ;