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| 1 | +import { cn } from '@/shared/lib'; |
| 2 | +import { useCallback, useEffect, useRef, useState } from 'react'; |
| 3 | +import type { DropdownOption } from 'react-day-picker'; |
| 4 | + |
| 5 | +export interface CustomDropdownProps { |
| 6 | + value?: number; |
| 7 | + onChange: (next: number) => void; |
| 8 | + options: DropdownOption[]; |
| 9 | + 'aria-label'?: string; |
| 10 | + className?: string; |
| 11 | +} |
| 12 | + |
| 13 | +export function CustomDropdown({ |
| 14 | + value, |
| 15 | + onChange, |
| 16 | + options, |
| 17 | + 'aria-label': ariaLabel, |
| 18 | + className, |
| 19 | +}: CustomDropdownProps) { |
| 20 | + const [open, setOpen] = useState(false); |
| 21 | + const buttonRef = useRef<HTMLButtonElement>(null); |
| 22 | + const listRef = useRef<HTMLUListElement>(null); |
| 23 | + |
| 24 | + const calcSelectedIndex = useCallback(() => { |
| 25 | + const i = options.findIndex((o) => o.value === value); |
| 26 | + return i >= 0 ? i : 0; |
| 27 | + }, [options, value]); |
| 28 | + |
| 29 | + const [activeIndex, setActiveIndex] = useState<number>(calcSelectedIndex()); |
| 30 | + |
| 31 | + useEffect(() => { |
| 32 | + setActiveIndex(calcSelectedIndex()); |
| 33 | + }, [calcSelectedIndex]); |
| 34 | + |
| 35 | + const label = |
| 36 | + options.find((o) => o.value === value)?.label ?? options[0]?.label ?? ''; |
| 37 | + |
| 38 | + useEffect(() => { |
| 39 | + if (!open) return; |
| 40 | + |
| 41 | + const handler = (e: Event) => { |
| 42 | + const t = (e as Event).target as Node | null; |
| 43 | + if (!t) return; |
| 44 | + if (!buttonRef.current?.contains(t) && !listRef.current?.contains(t)) { |
| 45 | + setOpen(false); |
| 46 | + } |
| 47 | + }; |
| 48 | + |
| 49 | + const usePointer = |
| 50 | + typeof window !== 'undefined' && 'PointerEvent' in window; |
| 51 | + |
| 52 | + if (usePointer) { |
| 53 | + document.addEventListener('pointerdown', handler as EventListener, true); |
| 54 | + return () => |
| 55 | + document.removeEventListener( |
| 56 | + 'pointerdown', |
| 57 | + handler as EventListener, |
| 58 | + true, |
| 59 | + ); |
| 60 | + } else { |
| 61 | + document.addEventListener('mousedown', handler as EventListener, true); |
| 62 | + document.addEventListener('touchstart', handler as EventListener, true); |
| 63 | + return () => { |
| 64 | + document.removeEventListener( |
| 65 | + 'mousedown', |
| 66 | + handler as EventListener, |
| 67 | + true, |
| 68 | + ); |
| 69 | + document.removeEventListener( |
| 70 | + 'touchstart', |
| 71 | + handler as EventListener, |
| 72 | + true, |
| 73 | + ); |
| 74 | + }; |
| 75 | + } |
| 76 | + }, [open]); |
| 77 | + |
| 78 | + const onKeyDown = (e: React.KeyboardEvent) => { |
| 79 | + if ( |
| 80 | + !open && |
| 81 | + (e.key === 'ArrowDown' || e.key === 'ArrowUp' || e.key === ' ') |
| 82 | + ) { |
| 83 | + e.preventDefault(); |
| 84 | + setOpen(true); |
| 85 | + return; |
| 86 | + } |
| 87 | + if (!open) return; |
| 88 | + |
| 89 | + if (e.key === 'Escape') { |
| 90 | + setOpen(false); |
| 91 | + return; |
| 92 | + } |
| 93 | + |
| 94 | + if (e.key === 'ArrowDown') { |
| 95 | + e.preventDefault(); |
| 96 | + let i = activeIndex + 1; |
| 97 | + while (i < options.length && options[i].disabled) i++; |
| 98 | + setActiveIndex(Math.min(i, options.length - 1)); |
| 99 | + } else if (e.key === 'ArrowUp') { |
| 100 | + e.preventDefault(); |
| 101 | + let i = activeIndex - 1; |
| 102 | + while (i >= 0 && options[i].disabled) i--; |
| 103 | + setActiveIndex(Math.max(i, 0)); |
| 104 | + } else if (e.key === 'Enter') { |
| 105 | + e.preventDefault(); |
| 106 | + const opt = options[activeIndex]; |
| 107 | + if (opt && !opt.disabled) { |
| 108 | + onChange(opt.value); |
| 109 | + setOpen(false); |
| 110 | + } |
| 111 | + } |
| 112 | + }; |
| 113 | + |
| 114 | + return ( |
| 115 | + <div className={cn('relative inline-block', className)}> |
| 116 | + <button |
| 117 | + ref={buttonRef} |
| 118 | + type='button' |
| 119 | + aria-haspopup='listbox' |
| 120 | + aria-expanded={open} |
| 121 | + aria-label={ariaLabel} |
| 122 | + onClick={() => setOpen((v) => !v)} |
| 123 | + onKeyDown={onKeyDown} |
| 124 | + className={cn( |
| 125 | + 'h-[32px] rounded-[12px] bg-pink-50 border border-pink-100', |
| 126 | + 'px-3 pr-8 text-label-lg text-pink-800 inline-flex items-center gap-1', |
| 127 | + 'focus:outline-none focus:ring-2 focus:ring-pink-200', |
| 128 | + )} |
| 129 | + > |
| 130 | + {label} |
| 131 | + </button> |
| 132 | + |
| 133 | + {open && ( |
| 134 | + <ul |
| 135 | + ref={listRef} |
| 136 | + role='listbox' |
| 137 | + tabIndex={-1} |
| 138 | + aria-label={ariaLabel} |
| 139 | + className={cn( |
| 140 | + 'absolute z-50 mt-2 w-[14rem] max-h-[20rem] overflow-auto', |
| 141 | + 'rounded-[12px] border border-pink-200 bg-white p-1 shadow-xl', |
| 142 | + )} |
| 143 | + > |
| 144 | + {options.map((opt, idx) => { |
| 145 | + const selected = opt.value === value; |
| 146 | + const highlighted = idx === activeIndex; |
| 147 | + |
| 148 | + return ( |
| 149 | + <li |
| 150 | + key={opt.value} |
| 151 | + role='option' |
| 152 | + aria-selected={selected} |
| 153 | + aria-disabled={opt.disabled || undefined} |
| 154 | + onMouseEnter={() => setActiveIndex(idx)} |
| 155 | + onPointerDown={(e) => e.preventDefault()} |
| 156 | + onClick={() => { |
| 157 | + if (!opt.disabled) { |
| 158 | + onChange(opt.value); |
| 159 | + setOpen(false); |
| 160 | + } |
| 161 | + }} |
| 162 | + className={cn( |
| 163 | + 'relative cursor-pointer select-none rounded-[8px] px-3 py-2 text-body-md', |
| 164 | + opt.disabled && 'opacity-40 pointer-events-none', |
| 165 | + highlighted && 'bg-pink-50', |
| 166 | + selected && 'text-pink-800 font-medium', |
| 167 | + )} |
| 168 | + > |
| 169 | + {opt.label} |
| 170 | + </li> |
| 171 | + ); |
| 172 | + })} |
| 173 | + </ul> |
| 174 | + )} |
| 175 | + </div> |
| 176 | + ); |
| 177 | +} |
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