import type { IView } from "@thi.ng/atom" ; import { EV_SET_VALUE } from "@thi.ng/interceptors" ; import { toPath } from "@thi.ng/paths/path" ; import { comp } from "@thi.ng/transducers/comp" ; import { filterFuzzy } from "@thi.ng/transducers/filter-fuzzy" ; import { iterator } from "@thi.ng/transducers/iterator" ; import { map } from "@thi.ng/transducers/map" ; import { dropdownListeners , type , DropdownItem , type , DropdownState } from "./dropdown" ; export interface FuzzyArgs { state : IView < DropdownState > ; filter : IView < string > ; dropdown : any ; input : any ; hoverLabel : any ; placeholder : string ; } export const fuzzyDropdown = ( ctx , opts ) => { const close = ( ) => ctx . bus . dispatch ( [ EV_SET_VALUE , [ opts . state . path + ".open" , false ] ] ) ; const filterInput = [ opts . input , { state : opts . filter . deref ( ) , placeholder : opts . placeholder , oninput : ( e ) => ctx . bus . dispatch ( [ EV_SET_VALUE , [ opts . filter . path , ( < any > e . target ) . value ] , ] ) , onclear : ( ) => ctx . bus . dispatch ( [ EV_SET_VALUE , [ opts . filter . path , "" ] ] ) , oncancel : close , onconfirm : close , } , ] ; return ( ) => { const state = { ... opts . state . deref ( ) } ; const filter = opts . filter . deref ( ) ! . toLowerCase ( ) ; if ( filter && state . open ) { state . items = [ ... iterator ( comp ( filterFuzzy ( filter , { key : ( x ) => x [ 1 ] . toLowerCase ( ) , } ) , map ( ( [ id , x ] ) => < DropdownItem > [ id , highlightMatches ( ( y ) => [ "span" , ctx . theme . fuzzy , y ] , x , filter ) , ] ) ) , state . items ) , ] ; } return [ opts . dropdown , { ... dropdownListeners ( ctx , toPath ( opts . state . path ) ) , openLabel : filterInput , hoverLabel : opts . hoverLabel , noItems : "no matches" , state , } , ] ; } ; } ; const highlightMatches = ( fn , x , filter ) => { const res = [ ] ; let prev = - 1 , n = x . length - 1 , m = filter . length ; for ( let i = 0 , j = 0 ; i <= n && j < m ; i ++ ) { const c = x . charAt ( i ) ; if ( c . toLowerCase ( ) === filter . charAt ( j ) ) { i - prev > 1 && res . push ( x . substring ( prev + 1 , i ) ) ; res . push ( fn ( c ) ) ; prev = i ; j ++ ; } } prev < n && res . push ( x . substr ( prev + 1 ) ) ; return res ; } ;