| 1 | import { |
| 2 | type PointerEvent as ReactPointerEvent, |
| 3 | type ReactNode, |
| 4 | useCallback, |
| 5 | useEffect, |
| 6 | useState, |
| 7 | } from "react"; |
| 8 | |
| 9 | import { cn } from "@/lib/utils"; |
| 10 | |
| 11 | const STORAGE_KEY = "nanobot-webui.split-ratio"; |
| 12 | const DEFAULT_RATIO = 0.45; |
| 13 | const MIN_LEFT_PX = 360; |
| 14 | const MIN_RIGHT_PX = 420; |
| 15 | |
| 16 | function readRatio(): number { |
| 17 | try { |
| 18 | const raw = localStorage.getItem(STORAGE_KEY); |
| 19 | if (!raw) return DEFAULT_RATIO; |
| 20 | const n = Number(raw); |
| 21 | return Number.isFinite(n) |
| 22 | ? Math.min(0.7, Math.max(0.25, n)) |
| 23 | : DEFAULT_RATIO; |
| 24 | } catch { |
| 25 | return DEFAULT_RATIO; |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | interface SplitPaneProps { |
| 30 | left: ReactNode; |
| 31 | right: ReactNode; |
| 32 | className?: string; |
| 33 | } |
| 34 | |
| 35 | export function SplitPane({ left, right, className }: SplitPaneProps) { |
| 36 | const [ratio, setRatio] = useState(readRatio); |
| 37 | const [dragging, setDragging] = useState(false); |
| 38 | |
| 39 | useEffect(() => { |
| 40 | try { |
| 41 | localStorage.setItem(STORAGE_KEY, String(ratio)); |
| 42 | } catch {} |
| 43 | }, [ratio]); |
| 44 | |
| 45 | const onPointerDown = useCallback((e: ReactPointerEvent<HTMLDivElement>) => { |
| 46 | e.preventDefault(); |
| 47 | setDragging(true); |
| 48 | const container = (e.currentTarget as HTMLElement).parentElement!; |
| 49 | const rect = container.getBoundingClientRect(); |
| 50 | |
| 51 | const onMove = (me: PointerEvent) => { |
| 52 | const x = me.clientX - rect.left; |
| 53 | const total = rect.width; |
| 54 | const leftPx = Math.max(MIN_LEFT_PX, Math.min(total - MIN_RIGHT_PX, x)); |
| 55 | setRatio(leftPx / total); |
| 56 | }; |
| 57 | const onUp = () => { |
| 58 | setDragging(false); |
| 59 | window.removeEventListener("pointermove", onMove); |
| 60 | window.removeEventListener("pointerup", onUp); |
| 61 | }; |
| 62 | window.addEventListener("pointermove", onMove); |
| 63 | window.addEventListener("pointerup", onUp); |
| 64 | }, []); |
| 65 | |
| 66 | const pct = `${(ratio * 100).toFixed(2)}%`; |
| 67 | |
| 68 | return ( |
| 69 | <div |
| 70 | className={cn( |
| 71 | "relative flex h-full min-h-0 w-full overflow-hidden", |
| 72 | className, |
| 73 | )} |
| 74 | style={dragging ? { userSelect: "none" } : undefined} |
| 75 | > |
| 76 | <div |
| 77 | className="flex h-full min-w-0 flex-col overflow-hidden" |
| 78 | style={{ width: right ? pct : "100%" }} |
| 79 | > |
| 80 | {left} |
| 81 | </div> |
| 82 | |
| 83 | {/* divider */} |
| 84 | {right ? ( |
| 85 | <div |
| 86 | className="group/divider relative z-10 w-3 shrink-0 cursor-col-resize" |
| 87 | onPointerDown={onPointerDown} |
| 88 | > |
| 89 | <div |
| 90 | className={cn( |
| 91 | "absolute inset-y-0 left-1/2 w-px -translate-x-1/2 transition-colors duration-200", |
| 92 | dragging ? "bg-foreground/20" : "bg-border/70", |
| 93 | )} |
| 94 | /> |
| 95 | <div |
| 96 | className={cn( |
| 97 | "absolute left-1/2 top-1/2 h-10 w-1 -translate-x-1/2 -translate-y-1/2 rounded-full transition-all duration-200", |
| 98 | dragging |
| 99 | ? "bg-foreground/30 shadow-sm" |
| 100 | : "bg-border/80 group-hover/divider:bg-foreground/20 group-hover/divider:shadow-sm", |
| 101 | )} |
| 102 | /> |
| 103 | </div> |
| 104 | ) : null} |
| 105 | |
| 106 | <div className="flex h-full min-w-0 flex-1 flex-col overflow-hidden"> |
| 107 | {right} |
| 108 | </div> |
| 109 | </div> |
| 110 | ); |
| 111 | } |
| 112 |