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import { useEffect, useId, useRef, useState } from "react"; import { cn } from "@/lib/utils"; export type DragSelectItem = { id: string; name: string; meta: string; kind: Kind }; type Kind = "folder" | "doc" | "image" | "sheet" | "code" | "video" | "audio" | "archive"; type Box = { left: number; top: number; right: number; bottom: number }; // Movement below this is a click on empty space, not the start of a marquee. const DRAG_THRESHOLD = 3; // Within this distance of the top or bottom edge the list scrolls on its own, // faster the closer the pointer gets, up to MAX_SCROLL px per frame. const SCROLL_EDGE = 40; const MAX_SCROLL = 14; const EASE_OUT = "cubic-bezier(0.23, 1, 0.32, 1)"; type Drag = { pointerId: number; // Start point in content coordinates, so it stays pinned while scrolling. x: number; y: number; clientX: number; clientY: number; // What was selected before the drag, kept when Shift or Cmd is held. base: Set | null; active: boolean; boxes: Box[]; }; export function DragSelect({ items, label, className, }: { items: DragSelectItem[]; label: string; className?: string; }) { const [selected, setSelected] = useState>(() => new Set()); const [focusIndex, setFocusIndex] = useState(0); const selectedRef = useRef(selected); const anchor = useRef(null); const lastPointer = useRef("mouse"); const scrollerRef = useRef(null); const contentRef = useRef(null); const marqueeRef = useRef(null); const tiles = useRef<(HTMLDivElement | null)[]>([]); const drag = useRef(null); const frame = useRef(0); const instructions = useId(); useEffect(() => () => cancelAnimationFrame(frame.current), []); const commit = (next: Set) => { const prev = selectedRef.current; // Marquee moves fire constantly; only re-render when membership changes. if (next.size === prev.size && [...next].every((i) => prev.has(i))) return; selectedRef.current = next; setSelected(next); }; const range = (from: number, to: number) => { const set = new Set(); for (let i = Math.min(from, to); i <= Math.max(from, to); i++) set.add(i); return set; }; const focusTile = (index: number) => { setFocusIndex(index); const tile = tiles.current[index]; tile?.focus({ preventScroll: true }); tile?.scrollIntoView({ block: "nearest" }); }; // Tiles flow into however many columns fit, so count them from layout. const columns = () => { const top = tiles.current[0]?.offsetTop; return Math.max(1, tiles.current.filter((t) => t?.offsetTop === top).length); }; const paintMarquee = () => { const d = drag.current; const content = contentRef.current; const marquee = marqueeRef.current; if (!d || !content || !marquee) return; const box = content.getBoundingClientRect(); // Clamped to the content, so the marquee never widens the scroll area. const x = Math.min(Math.max(d.clientX - box.left, 0), content.offsetWidth); const y = Math.min(Math.max(d.clientY - box.top, 0), content.offsetHeight); const left = Math.min(d.x, x); const top = Math.min(d.y, y); const right = Math.max(d.x, x); const bottom = Math.max(d.y, y); marquee.style.transform = `translate(${left}px, ${top}px)`; marquee.style.width = `${right - left}px`; marquee.style.height = `${bottom - top}px`; const next = new Set(d.base); d.boxes.forEach((b, i) => { if (b.left < right && b.right > left && b.top < bottom && b.bottom > top) { next.add(i); } }); commit(next); }; const autoscroll = () => { const d = drag.current; const scroller = scrollerRef.current; if (!d?.active || !scroller) return; const box = scroller.getBoundingClientRect(); const fromTop = d.clientY - box.top; const fromBottom = box.bottom - d.clientY; let speed = 0; if (fromTop < SCROLL_EDGE) speed = -MAX_SCROLL * (1 - Math.max(fromTop, 0) / SCROLL_EDGE); else if (fromBottom < SCROLL_EDGE) speed = MAX_SCROLL * (1 - Math.max(fromBottom, 0) / SCROLL_EDGE); if (speed) { const before = scroller.scrollTop; scroller.scrollTop += speed; if (scroller.scrollTop !== before) paintMarquee(); } frame.current = requestAnimationFrame(autoscroll); }; const endDrag = () => { const d = drag.current; drag.current = null; cancelAnimationFrame(frame.current); const marquee = marqueeRef.current; if (!d?.active || !marquee) return; // Fades out quickly; it never holds up the next drag, which resets it. marquee.style.transition = `opacity 120ms ${EASE_OUT}`; marquee.style.opacity = "0"; }; const onPointerDown = (e: React.PointerEvent) => { lastPointer.current = e.pointerType; if (e.button !== 0 || drag.current) return; // Touch keeps native scrolling; tapping tiles toggles them instead. if (e.pointerType === "touch") return; if ((e.target as Element).closest("[role=option]")) return; const content = e.currentTarget; // Stops text selection and keeps focus in the list for shortcuts. e.preventDefault(); tiles.current[focusIndex]?.focus({ preventScroll: true }); content.setPointerCapture(e.pointerId); const box = content.getBoundingClientRect(); const additive = e.shiftKey || e.metaKey || e.ctrlKey; drag.current = { pointerId: e.pointerId, x: e.clientX - box.left, y: e.clientY - box.top, clientX: e.clientX, clientY: e.clientY, base: additive ? new Set(selectedRef.current) : null, active: false, // Measured once per drag; positions inside the content never change. boxes: tiles.current.map((t) => t ? { left: t.offsetLeft, top: t.offsetTop, right: t.offsetLeft + t.offsetWidth, bottom: t.offsetTop + t.offsetHeight, } : { left: 0, top: 0, right: 0, bottom: 0 }, ), }; }; const onPointerMove = (e: React.PointerEvent) => { const d = drag.current; if (!d || e.pointerId !== d.pointerId) return; d.clientX = e.clientX; d.clientY = e.clientY; if (!d.active) { const box = e.currentTarget.getBoundingClientRect(); const moved = Math.hypot(e.clientX - box.left - d.x, e.clientY - box.top - d.y); if (moved < DRAG_THRESHOLD) return; d.active = true; const marquee = marqueeRef.current; if (marquee) { // Appears instantly: it is drawn by the hand, not by the interface. marquee.style.transition = "none"; marquee.style.opacity = "1"; } frame.current = requestAnimationFrame(autoscroll); } paintMarquee(); }; const onPointerUp = (e: React.PointerEvent) => { const d = drag.current; if (!d || e.pointerId !== d.pointerId) return; // A plain click on empty space clears, like the desktop. if (!d.active && !d.base) { commit(new Set()); anchor.current = null; } endDrag(); }; const onTileClick = (index: number, e: React.MouseEvent) => { const set = new Set(selectedRef.current); if (lastPointer.current === "touch") { // No modifier keys on touch, so every tap toggles. if (set.has(index)) set.delete(index); else set.add(index); anchor.current = index; } else if (e.shiftKey) { const from = anchor.current ?? index; const span = range(from, index); commit(e.metaKey || e.ctrlKey ? new Set([...set, ...span]) : span); setFocusIndex(index); return; } else if (e.metaKey || e.ctrlKey) { if (set.has(index)) set.delete(index); else set.add(index); anchor.current = index; } else { set.clear(); set.add(index); anchor.current = index; } commit(set); setFocusIndex(index); }; const onKeyDown = (e: React.KeyboardEvent) => { const last = items.length - 1; const cols = columns(); const moves: Record = { ArrowLeft: focusIndex - 1, ArrowRight: focusIndex + 1, ArrowUp: focusIndex - cols, ArrowDown: focusIndex + cols, Home: 0, End: last, }; if (e.key in moves) { e.preventDefault(); const next = moves[e.key]; if (next < 0 || next > last) return; if (e.shiftKey) { // Shift extends from the anchor, the same as Shift-clicking. anchor.current ??= focusIndex; commit(range(anchor.current, next)); } focusTile(next); return; } if (e.key === " ") { e.preventDefault(); if (e.shiftKey && anchor.current !== null) { commit(new Set([...selectedRef.current, ...range(anchor.current, focusIndex)])); return; } const set = new Set(selectedRef.current); if (set.has(focusIndex)) set.delete(focusIndex); else set.add(focusIndex); anchor.current = focusIndex; commit(set); return; } if (e.key.toLowerCase() === "a" && (e.metaKey || e.ctrlKey)) { e.preventDefault(); commit(range(0, last)); return; } if (e.key === "Escape" && selectedRef.current.size > 0) { e.preventDefault(); commit(new Set()); anchor.current = null; } }; const count = selected.size; const toggleAll = () => { commit(count > 0 ? new Set() : range(0, items.length - 1)); anchor.current = null; }; return (

{label}

{items.length} items

{count} selected

Arrow keys move, Space toggles, Shift with arrows extends the selection, Control or Command A selects all, Escape clears.

); } function Swap({ visible, children }: { visible: boolean; children: React.ReactNode }) { return ( {children} ); } const ICONS: Record = { folder: , doc: ( <> ), image: ( <> ), sheet: ( <> ), code: ( <> ), video: ( <> ), audio: ( <> ), archive: ( <> ), }; function FileIcon({ kind }: { kind: Kind }) { return ( ); } const FILES: DragSelectItem[] = [ { id: "1", name: "Projects", meta: "12 items", kind: "folder" }, { id: "2", name: "Invoices", meta: "48 items", kind: "folder" }, { id: "3", name: "Brief.pdf", meta: "240 KB", kind: "doc" }, { id: "4", name: "Roadmap.md", meta: "8 KB", kind: "doc" }, { id: "5", name: "Cover.png", meta: "2.1 MB", kind: "image" }, { id: "6", name: "Budget.csv", meta: "36 KB", kind: "sheet" }, { id: "7", name: "index.ts", meta: "4 KB", kind: "code" }, { id: "8", name: "Intro.mp4", meta: "84 MB", kind: "video" }, { id: "9", name: "Theme.wav", meta: "9.6 MB", kind: "audio" }, { id: "10", name: "Backup.zip", meta: "1.2 GB", kind: "archive" }, { id: "11", name: "Sketch.png", meta: "860 KB", kind: "image" }, { id: "12", name: "Notes.txt", meta: "2 KB", kind: "doc" }, { id: "13", name: "Metrics.csv", meta: "120 KB", kind: "sheet" }, { id: "14", name: "server.go", meta: "11 KB", kind: "code" }, { id: "15", name: "Demo.mov", meta: "210 MB", kind: "video" }, { id: "16", name: "Assets", meta: "96 items", kind: "folder" }, ]; export default function DragSelectDemo() { return ; } 5e:["$","div",null,{"className":"mt-3 flex min-h-0 min-w-0 flex-1 flex-col gap-3","children":[["$","div",null,{"className":"flex shrink-0 items-start gap-3","children":[["$","div",null,{"className":"flex max-h-28 min-w-0 flex-1 flex-wrap items-center gap-2 overflow-y-auto","children":[null,["$","$L5f",null,{"namespace":"@xevrion","registryDependencies":["utils"]}]]}],["$","$L60",null,{"children":["$","div",null,{"className":"@container","children":["$","div",null,{"className":"grid grid-cols-1 gap-4 @xl:grid-cols-2","children":[["$","div",null,{"className":"flex flex-col border rounded-md","children":[["$","p",null,{"className":"text-sm font-medium border-b p-2","children":"Light Mode"}],["$","div",null,{"children":["$","$L61",null,{"type":"always","className":"h-80 px-2","children":[["$","div",null,{"className":"gap-2 pb-8 flex flex-col pt-4","children":[["$","div","shadow-raised",{"className":"items-start gap-1 grid grid-cols-2 text-sm","children":[["$","div",null,{"className":"hover:bg-muted/50 py-2","children":["$","p",null,{"className":"text-foreground/80 text-sm","children":["--","shadow-raised",":"]}]}],["$","div",null,{"className":"hover:bg-muted/50 py-2 px-1 rounded-md w-full","children":"0 0 0 1px oklch(0 0 0 / 0.06), 0 1px 2px oklch(0 0 0 / 0.06), 0 6px 16px -6px oklch(0 0 0 / 0.12)"}]]}]]}],["$","$L62",null,{"orientation":"horizontal"}]]}]}]]}],["$","div",null,{"className":"flex flex-col border rounded-md","children":[["$","p",null,{"className":"text-sm font-medium border-b p-2","children":"Dark Mode"}],["$","div",null,{"children":["$","$L61",null,{"type":"always","className":"h-80 px-2","children":[["$","div",null,{"className":"gap-2 pb-8 flex flex-col pt-4","children":[["$","div","shadow-raised",{"className":"items-start gap-1 grid grid-cols-2 text-sm","children":[["$","div",null,{"className":"hover:bg-muted/50 py-2","children":["$","p",null,{"className":"text-foreground/80 text-sm","children":["--","shadow-raised",":"]}]}],["$","div",null,{"className":"hover:bg-muted/50 py-2 px-1 rounded-md w-full","children":"0 0 0 1px oklch(1 0 0 / 0.08), 0 1px 2px oklch(0 0 0 / 0.4), 0 6px 16px -6px oklch(0 0 0 / 0.6)"}]]}]]}],["$","$L62",null,{"orientation":"horizontal"}]]}]}]]}],["$","div",null,{"className":"flex flex-col border rounded-md","children":[["$","p",null,{"className":"text-sm font-medium border-b p-2","children":"Theme"}],["$","div",null,{"children":["$","$L61",null,{"type":"always","className":"h-80 px-2","children":[["$","div",null,{"className":"gap-2 pb-8 flex flex-col pt-4","children":[["$","div","shadow-raised",{"className":"items-start gap-1 grid grid-cols-2 text-sm","children":[["$","div",null,{"className":"hover:bg-muted/50 py-2","children":["$","p",null,{"className":"text-foreground/80 text-sm","children":["--","shadow-raised",":"]}]}],["$","div",null,{"className":"hover:bg-muted/50 py-2 px-1 rounded-md w-full","children":"var(--shadow-raised)"}]]}]]}],["$","$L62",null,{"orientation":"horizontal"}]]}]}]]}],null]}]}]}]]}],["$","$L63",null,{"files":[{"path":"components/drag-select.tsx","content":"$64","type":"registry:component"}],"className":"h-[70svh] min-h-80"}]]}]