import { Position , Row , Unit } from "./stack" ; type Size = Record < "x1" | "x2" | "y1" | "y2" , number > ; function unitsOverlap ( prevUnit , nextUnit , direction ) { if ( prevUnit === nextUnit ) return false ; const prevSize = createBoundaries ( prevUnit ) ; const nextSize = createBoundaries ( nextUnit ) ; const position1 = `${ direction }1` as keyof Size ; const position2 = `${ direction }2` as keyof Size ; /**
     * [-- prevUnit --]
     * [-- nextUnit --]
     */ const fitInTailHead = nextSize [ position1 ] >= prevSize [ position1 ] && nextSize [ position2 ] <= prevSize [ position2 ] ; /**
     *     [-- prevUnit --]
     * [-- nextUnit --]
     */ const fitHead = prevSize [ position1 ] >= nextSize [ position1 ] && prevSize [ position1 ] <= nextSize [ position2 ] ; /**
     *  [-- prevUnit --]
     *            [-- nextUnit --]
     */ const fitTail = prevSize [ position2 ] >= nextSize [ position1 ] && prevSize [ position2 ] <= nextSize [ position2 ] ; return fitInTailHead || fitHead || fitTail ; } function createBoundaries ( unit ) { return { x1 : unit . position . x , x2 : unit . position . x + unit . position . width , y1 : unit . position . y , y2 : unit . position . y + unit . position . height , } ; } function getPosition ( node ) { return node . getBoundingClientRect ( ) ; } function rowFindCloserUnit ( units , unit , direction ) { let unitCandidate ; const position1 = `${ direction }1` as keyof Size ; const position2 = `${ direction }2` as keyof Size ; const unitSize = createBoundaries ( unit ) ; for ( const itemRow of units ) { if ( itemRow === unit ) return ; if ( unitCandidate ) { const candidateSize = createBoundaries ( unitCandidate ) ; const itemRowSize = createBoundaries ( itemRow ) ; if ( itemRowSize [ position1 ] > unitSize [ position1 ] ) { /**
                 * Right / Bottom
                 */ const diffCandidateToUnit = candidateSize [ position1 ] - unitSize [ position2 ] ; const diffItemRowToUnit = itemRowSize [ position1 ] - unitSize [ position2 ] ; if ( diffItemRowToUnit < diffCandidateToUnit ) { unitCandidate = itemRow ; } } else { /**
                 * Left / Top
                 */ const diffCandidateToUnit = unitSize [ position1 ] - candidateSize [ position2 ] ; const diffItemRowToUnit = unitSize [ position1 ] - itemRowSize [ position2 ] ; if ( diffItemRowToUnit < diffCandidateToUnit ) { unitCandidate = itemRow ; } } } else { unitCandidate = itemRow ; } } return unitCandidate ; } export { unitsOverlap , createBoundaries , getPosition , rowFindCloserUnit } ;