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30:T16f4,"use client"; import { useMemo, useState } from "react"; import { IconLayoutGrid, IconMap, IconPlayerPause, IconPlayerPlay, IconSearch } from "@tabler/icons-react"; import { Input } from "@/components/ui/input"; import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"; import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip"; import { cn } from "@/lib/utils"; import { BrowseCanvas } from "./browse-canvas"; import { BrowseMasonry } from "./browse-masonry"; import type { BrowseGridProps, BrowseGridView } from "./types"; import "./browse-grid.css"; function matches(item: { title: string; tags?: string[] }, query: string): boolean { const q = query.trim().toLowerCase(); if (!q) return true; const words = q.split(/\s+/); const hay = `${item.title} ${(item.tags ?? []).join(" ")}`.toLowerCase(); return words.every((word) => hay.includes(word)); } /** * The grid experience: searchable, tag-filterable masonry plus an infinite * canvas of the same items. Videos hover-play through a shared pool that caps * concurrent decoders; posters carry the layout everywhere else. */ export function BrowseGrid({ items, view: controlledView, defaultView = "masonry", onViewChange, searchable = true, filterable = true, paused: controlledPaused, onPausedChange, className, }: BrowseGridProps) { const [internalView, setInternalView] = useState(defaultView); const [internalPaused, setInternalPaused] = useState(false); const [query, setQuery] = useState(""); const [tag, setTag] = useState("all"); const view = controlledView ?? internalView; const paused = controlledPaused ?? internalPaused; const setView = (next: BrowseGridView) => { if (controlledView === undefined) setInternalView(next); onViewChange?.(next); }; const setPaused = (next: boolean) => { if (controlledPaused === undefined) setInternalPaused(next); onPausedChange?.(next); }; const tags = useMemo(() => { const seen = new Map(); for (const item of items) { for (const t of item.tags ?? []) seen.set(t, (seen.get(t) ?? 0) + 1); } return [...seen.entries()].sort((a, b) => b[1] - a[1]).map(([t]) => t); }, [items]); const filtered = useMemo(() => { const byTag = tag === "all" ? items : items.filter((item) => item.tags?.includes(tag)); return byTag.filter((item) => matches(item, query)); }, [items, tag, query]); const pauseLabel = paused ? "Play previews" : "Pause previews"; return (

{searchable ? ( setQuery(event.target.value)} placeholder="Search the grid" aria-label="Search the grid" className="h-8 border-0 bg-transparent shadow-none" /> ) : null} {filterable && tags.length > 0 ? ( { if (next[0]) setTag(next[0]); }} className="max-w-full flex-wrap" > All {tags.slice(0, 6).map((t) => ( {t} ))} ) : null}

{ const mode = next[0] as BrowseGridView | undefined; if (mode) setView(mode); }} className="browse-view-toggle" > }> Masonry }> Infinite canvas setPaused(!paused)} aria-label={pauseLabel} aria-pressed={paused} className="browse-pause" > {paused ? : } {pauseLabel}

{view === "canvas" ? ( ) : ( )}

); } export default BrowseGrid; 31:Te1d,"use client"; import { useEffect, useLayoutEffect, useRef, useState } from "react"; import { BrowseTile } from "./browse-tile"; import { mediaHeightFor, packPinMasonry, PIN_GAP, pinColumnCount, TILE_CHROME } from "./masonry"; import type { BrowseGridItem } from "./types"; import { useMediaAspects } from "./use-aspects"; const BATCH = 12; const useIsomorphicLayoutEffect = typeof window === "undefined" ? useEffect : useLayoutEffect; /** Pinterest masonry: appended tiles pack onto the shortest column, so settled tiles never move. */ export function BrowseMasonry({ items, paused = false }: { items: BrowseGridItem[]; paused?: boolean }) { const [visibleCount, setVisibleCount] = useState(() => Math.min(BATCH, items.length)); const [width, setWidth] = useState(0); const masonryRef = useRef(null); const sentinelRef = useRef(null); // Reset the window when the list identity changes: adjust-on-render, not an effect. const [lastItems, setLastItems] = useState(items); if (lastItems !== items) { setLastItems(items); setVisibleCount(Math.min(BATCH, items.length)); } useIsomorphicLayoutEffect(() => { const node = masonryRef.current; if (!node) return; const apply = () => { const next = Math.round(node.clientWidth); setWidth((current) => (current === next ? current : next)); }; apply(); const ro = new ResizeObserver(apply); ro.observe(node); return () => ro.disconnect(); }, []); useEffect(() => { const sentinel = sentinelRef.current; if (!sentinel || visibleCount >= items.length) return; const root = sentinel.closest("[data-browse-scroll]") as Element | null; const io = new IntersectionObserver( ([entry]) => { if (entry?.isIntersecting) setVisibleCount((count) => Math.min(count + BATCH, items.length)); }, { root, rootMargin: "600px 0px" }, ); io.observe(sentinel); return () => io.disconnect(); }, [items.length, visibleCount]); const shown = items.slice(0, visibleCount); const { aspects, setAspect } = useMediaAspects(shown); const columns = pinColumnCount(width); const columnWidth = width > 0 ? (width - PIN_GAP * (columns - 1)) / columns : 0; const heights = shown.map((item, index) => { const aspect = aspects[item.id] ?? item.media.aspect; return mediaHeightFor(Math.max(0, columnWidth - 8), aspect, index) + TILE_CHROME; }); const packed = packPinMasonry(shown.length, columns, columnWidth, PIN_GAP, heights); return (

0 ? { height: packed.height } : undefined}> {width > 0 ? shown.map((item, index) => { const slot = packed.slots[index]; if (!slot) return null; return ( setAspect(item.id, ratio)} mediaHeight={Math.max(96, slot.height - TILE_CHROME)} style={{ position: "absolute", top: slot.y, left: slot.x, width: slot.width }} /> ); }) : null}

{visibleCount < items.length ?

: null} {items.length === 0 ? (

Nothing matches that search yet.

) : null}

); } 32:T4012,"use client"; import { useCallback, useEffect, useLayoutEffect, useRef, useState } from "react"; import { animate, useReducedMotion } from "motion/react"; import { BrowseTile } from "./browse-tile"; import { canvasGridPeriod, canvasTileIndex, packCanvasColumn } from "./canvas-layout"; import { mediaHeightFor, TILE_CHROME } from "./masonry"; import type { BrowseGridItem } from "./types"; import { useMediaAspects } from "./use-aspects"; import { isConstrainedDevice, maxMountedVideos, priorityFromCenter } from "./video-pool"; type TileSpec = { key: string; index: number; /** World-space position; the stage carries the camera, so render never reads refs. */ x: number; y: number; height: number; /** Video inside the viewport plus a predict ring; poster-only in the farther overscan. */ media: "video" | "image"; priority: number; }; const DRAG_THRESHOLD = 8; const MIN_VELOCITY = 0.35; const COAST_MULTIPLIER = 18; const SETTLE_MS = 160; const PAN_SYNC_MS = 80; const VIDEO_PREDICT = 520; const IMAGE_OVERSCAN = 880; function mod(value: number, length: number) { return ((value % length) + length) % length; } function sameTiles(a: TileSpec[], b: TileSpec[]) { if (a.length !== b.length) return false; for (let i = 0; i < a.length; i += 1) { const x = a[i]!; const y = b[i]!; if (x.key !== y.key || x.x !== y.x || x.y !== y.y || x.media !== y.media || x.priority !== y.priority) return false; } return true; } const useIsomorphicLayoutEffect = typeof window === "undefined" ? useEffect : useLayoutEffect; /** * Camera-space infinite canvas: tiles sit in world space and the stage takes the * camera as one translate3d, so a pan is a single compositor update. Clips start * inside a predict ring so they are running when they scroll on; the farther * overscan stays poster-only and anything beyond is unmounted. */ export function BrowseCanvas({ items, paused = false }: { items: BrowseGridItem[]; paused?: boolean }) { const reduced = useReducedMotion() ?? false; const still = paused || reduced; const viewportRef = useRef(null); const stageRef = useRef(null); const { aspects } = useMediaAspects(items); const camera = useRef({ x: 0, y: 0 }); const velocity = useRef({ x: 0, y: 0 }); const lastPointer = useRef({ x: 0, y: 0 }); const travelled = useRef(0); const pointerDown = useRef(false); const panning = useRef(false); const suppressClick = useRef(false); const size = useRef({ w: 0, h: 0 }); const frame = useRef(0); const coast = useRef<{ stop: () => void }[]>([]); const settleTimer = useRef(0); const didCenter = useRef(false); const lastPanSync = useRef(0); const wheelSyncRaf = useRef(0); const [metrics, setMetrics] = useState({ cardW: 320, gap: 48 }); const [visibleTiles, setVisibleTiles] = useState([]); const [isDragging, setIsDragging] = useState(false); const cellW = metrics.cardW + metrics.gap; const itemCount = items.length; const geometry = useRef({ cellW, cardW: metrics.cardW, gap: metrics.gap, count: itemCount, heights: [] as number[] }); const packs = useRef(new Map()); const getPack = useCallback((col: number) => { const { count, gap, heights } = geometry.current; if (count <= 0) return { prefix: [0], periodH: 1, cols: 1, rows: 1 }; const { cols } = canvasGridPeriod(count); const key = mod(col, cols); const cached = packs.current.get(key); if (cached) return cached; const next = packCanvasColumn(key, count, gap, heights, 320 + TILE_CHROME); packs.current.set(key, next); return next; }, []); const collectVisible = useCallback((): TileSpec[] => { const { cellW: cw, cardW, count } = geometry.current; const { w, h } = size.current; if (!w || !h || !count) return []; const camX = camera.current.x; const camY = camera.current.y; const c0 = Math.floor((-IMAGE_OVERSCAN - camX - cardW) / cw); const c1 = Math.ceil((w + IMAGE_OVERSCAN - camX) / cw); const next: TileSpec[] = []; for (let col = c0; col <= c1; col += 1) { const pack = getPack(col); const period = Math.max(pack.periodH, 1); const k0 = Math.floor((-IMAGE_OVERSCAN - camY) / period) - 1; const k1 = Math.floor((h + IMAGE_OVERSCAN - camY) / period) + 1; for (let cycle = k0; cycle <= k1; cycle += 1) { for (let local = 0; local < pack.rows; local += 1) { const row = cycle * pack.rows + local; const index = canvasTileIndex(col, row, count); if (index == null) continue; const height = geometry.current.heights[index] ?? 320 + TILE_CHROME; const wx = col * cw; const wy = cycle * period + pack.prefix[local]!; const x = wx + camX; const y = wy + camY; if (x + cardW < -IMAGE_OVERSCAN || x > w + IMAGE_OVERSCAN) continue; if (y + height < -IMAGE_OVERSCAN || y > h + IMAGE_OVERSCAN) continue; const inPredict = x + cardW > -VIDEO_PREDICT && x < w + VIDEO_PREDICT && y + height > -VIDEO_PREDICT && y < h + VIDEO_PREDICT; const media = inPredict ? "video" : "image"; const rawPriority = media === "video" ? priorityFromCenter(x + cardW / 2, y + height / 2, w, h, VIDEO_PREDICT) : 0; next.push({ key: `${col}:${row}`, index, x: wx, y: wy, height, media, priority: Math.round(rawPriority / 80) * 80 }); } } } next.sort((a, b) => (a.key < b.key ? -1 : a.key > b.key ? 1 : 0)); const constrained = typeof navigator !== "undefined" && typeof window !== "undefined" ? isConstrainedDevice(navigator, window) : false; const mountCap = maxMountedVideos(typeof navigator === "undefined" ? undefined : navigator, constrained); const videos = next.filter((t) => t.media === "video").sort((a, b) => b.priority - a.priority); if (videos.length <= mountCap) return next; const keep = new Set(videos.slice(0, mountCap)); return next.map((t) => (t.media === "video" && !keep.has(t) ? { ...t, media: "image" as const, priority: 0 } : t)); }, [getPack]); const applyCamera = useCallback(() => { const stage = stageRef.current; if (!stage) return; stage.style.transform = `translate3d(${camera.current.x}px, ${camera.current.y}px, 0)`; }, []); const setTilesSafe = useCallback((next: TileSpec[]) => { setVisibleTiles((current) => (sameTiles(current, next) ? current : next)); }, []); const syncVisible = useCallback(() => { setTilesSafe(collectVisible()); applyCamera(); }, [applyCamera, collectVisible, setTilesSafe]); const syncVisibleThrottled = useCallback(() => { const now = performance.now(); if (now - lastPanSync.current < PAN_SYNC_MS) return; lastPanSync.current = now; syncVisible(); }, [syncVisible]); const markDragging = useCallback(() => { const node = viewportRef.current; if (node) node.dataset.dragging = "true"; setIsDragging(true); }, []); const scheduleSettle = useCallback(() => { window.clearTimeout(settleTimer.current); settleTimer.current = window.setTimeout(() => { const node = viewportRef.current; if (node) node.dataset.dragging = "false"; setIsDragging(false); syncVisible(); }, SETTLE_MS); }, [syncVisible]); const tickRef = useRef<() => void>(() => {}); const tick = useCallback(() => { applyCamera(); syncVisibleThrottled(); frame.current = panning.current ? requestAnimationFrame(() => tickRef.current()) : 0; }, [applyCamera, syncVisibleThrottled]); useEffect(() => { tickRef.current = tick; }, [tick]); const ensureLoop = useCallback(() => { if (!frame.current) frame.current = requestAnimationFrame(() => tickRef.current()); }, []); const stopCoast = useCallback(() => { coast.current.forEach((control) => control.stop()); coast.current = []; }, []); const springTo = useCallback( (toX: number, toY: number, opts: { duration?: number; bounce?: number; velocityX?: number; velocityY?: number } = {}) => { const { duration = 0.7, bounce = 0.16, velocityX = 0, velocityY = 0 } = opts; stopCoast(); markDragging(); const fromX = camera.current.x; const fromY = camera.current.y; let pending = 2; const onDone = () => { pending -= 1; if (pending === 0) scheduleSettle(); }; const onX = animate(fromX, toX, { type: "spring", duration, bounce, velocity: velocityX, onUpdate: (value) => { camera.current.x = value; applyCamera(); syncVisibleThrottled(); }, onComplete: onDone, }); const onY = animate(fromY, toY, { type: "spring", duration, bounce, velocity: velocityY, onUpdate: (value) => { camera.current.y = value; applyCamera(); syncVisibleThrottled(); }, onComplete: onDone, }); coast.current = [onX, onY]; }, [stopCoast, markDragging, applyCamera, scheduleSettle, syncVisibleThrottled], ); const springCoast = useCallback(() => { const speed = Math.hypot(velocity.current.x, velocity.current.y); if (reduced || speed < MIN_VELOCITY) { velocity.current.x = 0; velocity.current.y = 0; applyCamera(); scheduleSettle(); return; } const vx = velocity.current.x; const vy = velocity.current.y; velocity.current.x = 0; velocity.current.y = 0; springTo(camera.current.x + vx * COAST_MULTIPLIER, camera.current.y + vy * COAST_MULTIPLIER, { velocityX: vx, velocityY: vy, }); }, [springTo, applyCamera, scheduleSettle, reduced]); useEffect( () => () => { cancelAnimationFrame(frame.current); cancelAnimationFrame(wheelSyncRaf.current); window.clearTimeout(settleTimer.current); stopCoast(); }, [stopCoast], ); useIsomorphicLayoutEffect(() => { geometry.current = { cellW, cardW: metrics.cardW, gap: metrics.gap, count: itemCount, heights: items.map((item, index) => mediaHeightFor(metrics.cardW, aspects[item.id] ?? item.media.aspect, index) + TILE_CHROME), }; packs.current.clear(); }, [cellW, metrics.cardW, metrics.gap, itemCount, items, aspects]); useIsomorphicLayoutEffect(() => { applyCamera(); }); useIsomorphicLayoutEffect(() => { const node = viewportRef.current; if (!node) return; const measure = () => { const rect = node.getBoundingClientRect(); size.current = { w: rect.width, h: rect.height }; if (!rect.width || !rect.height) return; const cardW = Math.round(Math.min(340, Math.max(240, rect.width * 0.28))); const gap = Math.round(Math.max(36, cardW * 0.15)); if (!didCenter.current) { camera.current.x = (rect.width - cardW) / 2; camera.current.y = (rect.height - (mediaHeightFor(cardW, aspects[items[0]?.id ?? ""] ?? items[0]?.media.aspect, 0) + TILE_CHROME)) / 2; didCenter.current = true; } geometry.current = { cellW: cardW + gap, cardW, gap, count: items.length, heights: items.map((item, index) => mediaHeightFor(cardW, aspects[item.id] ?? item.media.aspect, index) + TILE_CHROME), }; packs.current.clear(); setMetrics({ cardW, gap }); setTilesSafe(collectVisible()); applyCamera(); }; measure(); const observer = new ResizeObserver(measure); observer.observe(node); return () => observer.disconnect(); }, [applyCamera, collectVisible, items, aspects, setTilesSafe]); useEffect(() => { const node = viewportRef.current; if (!node) return; const onWheel = (event: WheelEvent) => { event.preventDefault(); stopCoast(); markDragging(); camera.current.x -= event.deltaX; camera.current.y -= event.deltaY; velocity.current.x = 0; velocity.current.y = 0; applyCamera(); if (!wheelSyncRaf.current) { wheelSyncRaf.current = requestAnimationFrame(() => { wheelSyncRaf.current = 0; syncVisibleThrottled(); }); } scheduleSettle(); }; node.addEventListener("wheel", onWheel, { passive: false }); return () => node.removeEventListener("wheel", onWheel); }, [stopCoast, markDragging, applyCamera, syncVisibleThrottled, scheduleSettle]); const onPointerDown = (event: React.PointerEvent) => { if (event.button !== 0) return; stopCoast(); window.clearTimeout(settleTimer.current); pointerDown.current = true; panning.current = false; travelled.current = 0; lastPointer.current = { x: event.clientX, y: event.clientY }; velocity.current = { x: 0, y: 0 }; }; const onPointerMove = (event: React.PointerEvent) => { if (!pointerDown.current) return; const dx = event.clientX - lastPointer.current.x; const dy = event.clientY - lastPointer.current.y; lastPointer.current = { x: event.clientX, y: event.clientY }; travelled.current += Math.hypot(dx, dy); if (!panning.current) { if (travelled.current < DRAG_THRESHOLD) return; panning.current = true; lastPanSync.current = 0; markDragging(); event.currentTarget.setPointerCapture(event.pointerId); ensureLoop(); } camera.current.x += dx; camera.current.y += dy; velocity.current.x = velocity.current.x * 0.55 + dx * 0.45; velocity.current.y = velocity.current.y * 0.55 + dy * 0.45; applyCamera(); }; const endDrag = (event: React.PointerEvent) => { if (!pointerDown.current) return; pointerDown.current = false; const didPan = panning.current; panning.current = false; if (event.currentTarget.hasPointerCapture(event.pointerId)) { event.currentTarget.releasePointerCapture(event.pointerId); } if (didPan) { suppressClick.current = true; springCoast(); } }; const onKeyDown = (event: React.KeyboardEvent) => { const step = event.shiftKey ? 420 : 180; const moves: Record = { ArrowLeft: [step, 0], ArrowRight: [-step, 0], ArrowUp: [0, step], ArrowDown: [0, -step], }; const move = moves[event.key]; if (!move) return; event.preventDefault(); velocity.current.x = 0; velocity.current.y = 0; if (reduced) { camera.current.x += move[0]; camera.current.y += move[1]; syncVisible(); return; } springTo(camera.current.x + move[0], camera.current.y + move[1], { duration: 0.4, bounce: 0 }); }; if (items.length === 0) return

Nothing matches that search yet.

; return (

{ if (!suppressClick.current) return; suppressClick.current = false; event.preventDefault(); event.stopPropagation(); }} >

{visibleTiles.map((tile) => { const item = items[tile.index]; if (!item) return null; return (

); })}

); } 33:T1868,"use client"; import { useEffect, useRef, useState } from "react"; import { cn } from "@/lib/utils"; import type { BrowseGridItem } from "./types"; import { PRIORITY_HOVER, PRIORITY_VISIBLE, releasePlayback, requestPlayback } from "./video-pool"; function TileMedia({ item, eager, paused, allowVideo, priority = PRIORITY_VISIBLE, height, onAspect, }: { item: BrowseGridItem; eager?: boolean; paused?: boolean; allowVideo?: boolean; priority?: number; height?: number; onAspect?: (ratio: number) => void; }) { const rootRef = useRef(null); const videoRef = useRef(null); const [ready, setReady] = useState(false); const [readyPoster, setReadyPoster] = useState(null); const [failedPoster, setFailedPoster] = useState(null); const [inView, setInView] = useState(eager); const poster = item.media.poster ?? item.media.src; const posterReady = readyPoster === poster; const posterFailed = failedPoster === poster; // Eager tiles are in view by definition; sync flips during render, not in an effect. const [prevEager, setPrevEager] = useState(eager); if (prevEager !== eager) { setPrevEager(eager); setInView(eager); } useEffect(() => { if (eager) return; const node = rootRef.current; if (!node) return; const io = new IntersectionObserver( ([entry]) => setInView(entry?.isIntersecting === true), { rootMargin: "240px 0px", threshold: 0 }, ); io.observe(node); return () => io.disconnect(); }, [eager]); const mountVideo = item.media.type === "video" && allowVideo !== false && inView; useEffect(() => { const node = videoRef.current; if (!node || !mountVideo) return; if (paused) { releasePlayback(node); node.pause(); return; } requestPlayback(node, priority); return () => releasePlayback(node); }, [mountVideo, paused, priority]); // The video ref callback resets `ready` when its node unmounts, so no effect is needed. const showVideo = mountVideo && !paused && ready; return (

{!posterFailed ? ( <>

{/* eslint-disable-next-line @next/next/no-img-element -- local snapshot art, sized by the tile. */}

{ const img = event.currentTarget; const reveal = () => { if (img.naturalWidth > 0 && img.naturalHeight > 0) { onAspect?.(img.naturalWidth / img.naturalHeight); setReadyPoster(poster); } else { setFailedPoster(poster); } }; if (typeof img.decode === "function") void img.decode().then(reveal, reveal); else reveal(); }} onError={() => setFailedPoster(poster)} /> ) : (

Image unavailable

)} {mountVideo ? (

); } /** Glass tile: title bar over a media shell, stretched by a full-tile link. */ export function BrowseTile({ item, index, eager = false, paused = false, allowVideo = true, priority, mediaHeight, onAspect, style, className, }: { item: BrowseGridItem; index: number; eager?: boolean; paused?: boolean; allowVideo?: boolean; priority?: number; mediaHeight?: number; onAspect?: (ratio: number) => void; style?: React.CSSProperties; className?: string; }) { const videoBoost = useRef(null); return (

{ const video = event.currentTarget.querySelector("video"); if (video && !paused) requestPlayback(video, PRIORITY_HOVER); videoBoost.current = video; }} onMouseLeave={() => { const video = videoBoost.current; videoBoost.current = null; if (video && !paused) requestPlayback(video, priority ?? PRIORITY_VISIBLE); }} >

{item.title}

{item.tags?.[0] ? {item.tags[0]} : null}

); } 34:T4d5,/** Typed items for the browse-grid block. Content arrives by props; the block never invents copy. */ export type BrowseGridMedia = { /** Image tiles show a still; video tiles hover-play a muted loop through the video pool. */ type: "image" | "video"; /** Image src, or the clip src for video tiles. Local assets only (public/). */ src: string; /** Still shown before/instead of the clip. Falls back to src when omitted. */ poster?: string; /** Width divided by height. Tiles measure the real ratio on load when omitted. */ aspect?: number; }; export type BrowseGridItem = { id: string; title: string; href: string; media: BrowseGridMedia; tags?: string[]; }; export type BrowseGridView = "masonry" | "canvas"; export type BrowseGridProps = { items: BrowseGridItem[]; /** Controlled view mode. */ view?: BrowseGridView; defaultView?: BrowseGridView; onViewChange?: (view: BrowseGridView) => void; /** Show the search field. Defaults to true. */ searchable?: boolean; /** Show the tag filter row. Defaults to true. */ filterable?: boolean; /** Pause every video tile (pool releases its nodes). */ paused?: boolean; onPausedChange?: (paused: boolean) => void; className?: string; }; 35:T6f2,/** Pinterest packing for the masonry view: each tile goes on the shortest column, * so tiles already on screen never move when more are appended. */ export const PIN_GAP = 16; /** Title bar plus chrome padding, added under every media box. */ export const TILE_CHROME = 44; /** Placeholder ratios cycled until a tile reports its real width/height. */ const FALLBACK_ASPECTS = [4 / 5, 1, 3 / 4, 16 / 10, 4 / 5, 1]; export type MasonrySlot = { x: number; y: number; width: number; height: number }; export function pinColumnCount(width: number, maxColumns = 3): number { if (width >= 960) return Math.min(3, maxColumns); if (width >= 600) return Math.min(2, maxColumns); return 1; } /** Media-box height for a tile of width `cardW` and ratio `aspect` (w/h). */ export function mediaHeightFor(cardW: number, aspect: number | undefined, index: number): number { const ratio = aspect && Number.isFinite(aspect) && aspect > 0 ? aspect : FALLBACK_ASPECTS[index % FALLBACK_ASPECTS.length]!; return Math.max(96, Math.round(cardW / ratio)); } export function packPinMasonry( count: number, columns: number, columnWidth: number, gap: number, heights: number[], ): { slots: MasonrySlot[]; height: number } { const cols = Math.max(1, columns); const colY = Array.from({ length: cols }, () => 0); const slots: MasonrySlot[] = []; for (let i = 0; i < count; i += 1) { let col = 0; for (let c = 1; c < cols; c += 1) { if (colY[c]! < colY[col]!) col = c; } const height = heights[i] ?? 0; slots.push({ x: col * (columnWidth + gap), y: colY[col]!, width: columnWidth, height }); colY[col]! += height + gap; } const tallest = Math.max(0, ...colY); return { slots, height: count === 0 ? 0 : Math.max(0, tallest - gap) }; } 36:T6b4,/** World-space grid math for the infinite canvas view. The item list repeats forever: * world (col, row) maps back onto an item index, so panning never runs out of tiles. */ function mod(value: number, length: number) { return ((value % length) + length) % length; } /** Unique block size. Wide enough that a typical viewport never wraps onto a copy. */ export function canvasGridPeriod(count: number): { cols: number; rows: number } { if (count <= 0) return { cols: 1, rows: 1 }; const cols = Math.min(count, Math.max(5, Math.ceil(Math.sqrt(count)))); const rows = Math.ceil(count / cols); return { cols, rows }; } /** Item at world (col, row), or null for leftover cells in the last row. */ export function canvasTileIndex(col: number, row: number, count: number): number | null { if (count <= 0) return null; const { cols, rows } = canvasGridPeriod(count); const i = mod(row, rows) * cols + mod(col, cols); return i < count ? i : null; } /** Cumulative y offsets of one column inside a period, so variable heights stack. */ export function packCanvasColumn( col: number, count: number, gap: number, heights: number[], fallbackHeight: number, ): { prefix: number[]; periodH: number; cols: number; rows: number } { const { cols, rows } = canvasGridPeriod(count); const prefix: number[] = Array(rows + 1).fill(0); prefix[0] = 0; for (let row = 0; row < rows; row += 1) { const index = canvasTileIndex(col, row, count); if (index == null) { prefix[row + 1] = prefix[row]; continue; } prefix[row + 1] = prefix[row]! + (heights[index] ?? fallbackHeight) + gap; } return { prefix, periodH: Math.max(prefix[rows] ?? 1, 1), cols, rows }; } 37:Tf14,/** * Hover-play video pool. Only the most relevant clips decode at once: tiles register * with a priority, one rAF reconcile plays the top slice and pauses the rest so a * dense grid never melts the GPU. Callers only mount