61:I[314491,["/_next/static/immutable/chunks/3arlv5bvukoo2.js","/_next/static/immutable/chunks/39v64hmfyo-sr.js","/_next/static/immutable/chunks/2nvof3-29tvc3.js","/_next/static/immutable/chunks/3tjobt77z_9dj.js","/_next/static/immutable/chunks/04j_o97cgxn2x.js","/_next/static/immutable/chunks/3upr08c9vtj8w.js","/_next/static/immutable/chunks/1ww0328si-u8x.js","/_next/static/immutable/chunks/11mfl5ymqld9-.js","/_next/static/immutable/chunks/2xxcqy6ppds3l.js","/_next/static/immutable/chunks/1bpgyrs5qflhu.js","/_next/static/immutable/chunks/0-6vu2ul1h6ld.js","/_next/static/immutable/chunks/43_s7jweyypoh.js","/_next/static/immutable/chunks/0p6vao205o1jc.js","/_next/static/immutable/chunks/1_kyvgkyokw92.js","/_next/static/immutable/chunks/1lo-zn37dolb5.js","/_next/static/immutable/chunks/1v8k6yxw1rg0u.js"],"FilesView"] 62:T6cf4,import { useEffect, useRef, useState } from "react"; import type { ChangeEvent, DragEvent } from "react"; // The word cast into the flap, the hint under the plate and the post that arrives while nobody is using it. const plate = { word: "LETTERS", hint: "Post a file through the door", rule: "PDF, image or zip, up to 20 MB each" }; const samples = [ { name: "site-plan.pdf", size: "2.4 MB" }, { name: "signed-lease.pdf", size: "310 KB" }, { name: "kitchen-photos.zip", size: "18 MB" }, ]; const MAX_SHOWN = 3; type Posted = { key: number; name: string; size: string }; type Api = { post: (name: string) => void; hold: (on: boolean) => void; peek: (on: boolean) => void }; const sizeOf = (bytes: number) => (bytes >= 1048576 ? `${(bytes / 1048576).toFixed(1)} MB` : `${Math.max(1, Math.round(bytes / 1024))} KB`); export default function BrassLetterboxFileUpload() { const canvas = useRef(null); const api = useRef(null); const waiting = useRef([]); const serial = useRef(0); const depth = useRef(0); const [posted, setPosted] = useState([]); const [mine, setMine] = useState(false); const [note, setNote] = useState(""); useEffect(() => { const cv = canvas.current; if (!cv) return; const ctx = cv.getContext("2d"); if (!ctx) return; const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches; const q = Math.min(2, window.devicePixelRatio || 1); const fixed = document.createElement("canvas"), face = document.createElement("canvas"); const fc = fixed.getContext("2d"), tc = face.getContext("2d"); if (!fc || !tc) return; let W = 720, H = 430, S = 1, cx = 360, cy = 170; let PW = 0, PH = 0, AW = 0, AH = 0, ax = 0, ay = 0; // plate and aperture const flap = { a: 0, v: 0, want: 0, push: false }; type Letter = { art: HTMLCanvasElement; name: string; t: number; demo: boolean; done: boolean }; let letters: Letter[] = [], queue: { name: string; demo: boolean }[] = []; let demo = true, demoAt = 0.45, demoIx = 0, hold = false, peek = false, light = 0, lightTo = 0; let raf = 0, last = 0, seen = true, clock = 0, touched = -1e9, kinds = 0; let seed = 3; const rand = () => { seed = (seed * 16807) % 2147483647; return seed / 2147483647; }; const rr = (c: CanvasRenderingContext2D, x: number, y: number, w: number, h: number, r: number) => { c.beginPath(); c.moveTo(x + r, y); c.arcTo(x + w, y, x + w, y + h, r); c.arcTo(x + w, y + h, x, y + h, r); c.arcTo(x, y + h, x, y, r); c.arcTo(x, y, x + w, y, r); c.closePath(); }; // Polished brass mirrors the room: a pale ceiling, a dark line where wall meets floor, then warm floor light. const brass = (c: CanvasRenderingContext2D, y0: number, y1: number, shift: number) => { const g = c.createLinearGradient(0, y0, 0, y1), s = (p: number) => Math.max(0, Math.min(1, p + shift)); g.addColorStop(0, "#fff2c0"); g.addColorStop(s(0.1), "#f3d684"); g.addColorStop(s(0.32), "#d7ab4a"); g.addColorStop(s(0.47), "#a67a29"); g.addColorStop(s(0.515), "#6c4a13"); g.addColorStop(s(0.56), "#b98d35"); g.addColorStop(s(0.78), "#deb75a"); g.addColorStop(1, "#8d661f"); return g; }; const brushed = (c: CanvasRenderingContext2D, x: number, y: number, w: number, h: number, n: number) => { for (let i = 0; i < n; i++) { const v = rand(), yy = y + rand() * h, x0 = x + rand() * w * 0.6, len = w * (0.15 + rand() * 0.5); c.fillStyle = v > 0.5 ? `rgba(255,250,220,${(v - 0.5) * 0.2})` : `rgba(70,44,6,${(0.5 - v) * 0.2})`; c.fillRect(x0, yy, Math.min(len, x + w - x0), 0.6); } }; const screw = (c: CanvasRenderingContext2D, x: number, y: number, r: number, turn: number) => { c.beginPath(); c.arc(x, y + r * 0.18, r * 1.18, 0, Math.PI * 2); c.fillStyle = "rgba(50,30,4,0.55)"; c.fill(); const g = c.createRadialGradient(x - r * 0.35, y - r * 0.45, r * 0.1, x, y, r); g.addColorStop(0, "#fff6d2"); g.addColorStop(0.35, "#e4bf63"); g.addColorStop(0.8, "#a67b2a"); g.addColorStop(1, "#6d4c14"); c.beginPath(); c.arc(x, y, r, 0, Math.PI * 2); c.fillStyle = g; c.fill(); c.save(); c.translate(x, y); c.rotate(turn); c.fillStyle = "#3a2606"; c.fillRect(-r * 0.92, -r * 0.16, r * 1.84, r * 0.32); c.fillStyle = "rgba(255,240,190,0.7)"; c.fillRect(-r * 0.9, r * 0.16, r * 1.8, r * 0.1); c.restore(); }; const paintFixed = () => { fc.setTransform(q, 0, 0, q, 0, 0); fc.clearRect(0, 0, W, H); seed = 3; const px = cx - PW / 2, py = cy - PH / 2, R = 9 * S; // The plate stands a few millimetres off the paint: a tight contact shadow and a wide soft one. fc.save(); fc.shadowColor = "rgba(0,0,0,0.5)"; fc.shadowBlur = 34 * q * S; fc.shadowOffsetY = 20 * q * S; rr(fc, px + 6, py + 8, PW - 12, PH - 12, R); fc.fillStyle = "#000"; fc.fill(); fc.restore(); fc.save(); fc.shadowColor = "rgba(0,0,0,0.7)"; fc.shadowBlur = 6 * q * S; fc.shadowOffsetY = 4 * q * S; rr(fc, px, py, PW, PH, R); fc.fillStyle = "#000"; fc.fill(); fc.restore(); rr(fc, px, py, PW, PH, R); fc.fillStyle = brass(fc, py, py + PH, 0); fc.fill(); fc.save(); rr(fc, px, py, PW, PH, R); fc.clip(); brushed(fc, px, py, PW, PH, 520); // Outer bevel: lit along the top, shaded along the foot. const bev = fc.createLinearGradient(0, py, 0, py + PH); bev.addColorStop(0, "rgba(255,252,230,0.95)"); bev.addColorStop(0.5, "rgba(255,240,190,0.25)"); bev.addColorStop(1, "rgba(60,36,4,0.8)"); fc.lineWidth = 5 * S; fc.strokeStyle = bev; rr(fc, px + 1.5 * S, py + 1.5 * S, PW - 3 * S, PH - 3 * S, R - 1); fc.stroke(); fc.lineWidth = 1; fc.strokeStyle = "rgba(70,44,6,0.5)"; rr(fc, px + 5 * S, py + 5 * S, PW - 10 * S, PH - 10 * S, R - 3); fc.stroke(); fc.restore(); // Raised frame round the opening. const f = 9 * S; rr(fc, ax - f, ay - f, AW + f * 2, AH + f * 2, 5 * S); fc.fillStyle = brass(fc, ay - f - 20 * S, ay + AH + f + 16 * S, 0.06); fc.fill(); const ring = fc.createLinearGradient(0, ay - f, 0, ay + AH + f); ring.addColorStop(0, "rgba(255,250,225,0.95)"); ring.addColorStop(0.2, "rgba(255,240,190,0.2)"); ring.addColorStop(0.8, "rgba(60,36,4,0.3)"); ring.addColorStop(1, "rgba(50,30,2,0.85)"); fc.lineWidth = 2 * S; fc.strokeStyle = ring; rr(fc, ax - f + S, ay - f + S, AW + f * 2 - 2 * S, AH + f * 2 - 2 * S, 4 * S); fc.stroke(); fc.save(); fc.shadowColor = "rgba(40,22,0,0.55)"; fc.shadowBlur = 5 * q * S; fc.shadowOffsetY = 3 * q * S; fc.lineWidth = 1; fc.strokeStyle = "rgba(60,36,4,0.6)"; rr(fc, ax - f, ay - f, AW + f * 2, AH + f * 2, 5 * S); fc.stroke(); fc.restore(); // The hole, and the two rows of draught bristles behind it. const hole = fc.createLinearGradient(0, ay, 0, ay + AH); hole.addColorStop(0, "#000"); hole.addColorStop(0.5, "#0d0a06"); hole.addColorStop(1, "#1d150a"); fc.fillStyle = hole; fc.fillRect(ax, ay, AW, AH); for (let x = ax; x < ax + AW; x += 1.1) { const v = rand(), mid = ay + AH * (0.56 + (rand() - 0.5) * 0.07); fc.strokeStyle = `rgba(${70 + v * 60},${62 + v * 52},${50 + v * 40},${0.16 + v * 0.3})`; fc.lineWidth = 0.6; fc.beginPath(); fc.moveTo(x, ay + AH * 0.1); fc.lineTo(x + (rand() - 0.5) * 3, mid); fc.stroke(); fc.beginPath(); fc.moveTo(x, ay + AH); fc.lineTo(x + (rand() - 0.5) * 3, mid + 1.5); fc.stroke(); } const inner = fc.createLinearGradient(0, ay, 0, ay + AH); inner.addColorStop(0, "rgba(0,0,0,0.95)"); inner.addColorStop(0.45, "rgba(0,0,0,0.25)"); inner.addColorStop(1, "rgba(0,0,0,0)"); fc.fillStyle = inner; fc.fillRect(ax, ay, AW, AH); fc.fillStyle = "rgba(255,236,170,0.5)"; fc.fillRect(ax, ay + AH - 1, AW, 1); const sx = (PW - AW) / 4 + f * 0.1; screw(fc, px + sx, cy, 6.5 * S, 0.5); screw(fc, px + PW - sx, cy, 6.5 * S, -0.9); // The flap is painted once, flat, and squeezed as it swings. face.width = Math.ceil(AW * q); face.height = Math.ceil(AH * q); tc.setTransform(q, 0, 0, q, 0, 0); tc.clearRect(0, 0, AW, AH); tc.fillStyle = brass(tc, -AH * 0.54, AH * 2.06, 0); tc.fillRect(0, 0, AW, AH); brushed(tc, 0, 0, AW, AH, 300); // Hinge barrel along the top edge. const hb = 7 * S, hg = tc.createLinearGradient(0, 0, 0, hb); hg.addColorStop(0, "#8a6520"); hg.addColorStop(0.3, "#fff3c6"); hg.addColorStop(0.55, "#d3a745"); hg.addColorStop(1, "#5d400f"); tc.fillStyle = hg; tc.fillRect(0, 0, AW, hb); tc.fillStyle = "rgba(50,30,2,0.55)"; tc.fillRect(0, hb, AW, 1.2); for (let x = AW / 10; x < AW - 4; x += AW / 5) { tc.fillStyle = "rgba(50,30,2,0.7)"; tc.fillRect(x, 0, 1, hb); tc.fillStyle = "rgba(255,246,205,0.6)"; tc.fillRect(x + 1, 0, 0.8, hb); } // Raised border and the cast word. const edge = tc.createLinearGradient(0, hb, 0, AH); edge.addColorStop(0, "rgba(255,250,225,0.8)"); edge.addColorStop(0.5, "rgba(255,240,190,0.12)"); edge.addColorStop(1, "rgba(60,36,4,0.7)"); tc.lineWidth = 1.6 * S; tc.strokeStyle = edge; rr(tc, 9 * S, hb + 7 * S, AW - 18 * S, AH - hb - 14 * S, 3 * S); tc.stroke(); tc.font = `700 ${22 * S}px Georgia, "Times New Roman", serif`; tc.textBaseline = "middle"; tc.textAlign = "left"; const gap = 9 * S, widths = [...plate.word].map((ch) => tc.measureText(ch).width), total = widths.reduce((a, b) => a + b, 0) + gap * (plate.word.length - 1); const ty = hb + (AH - hb) / 2 + S; for (const [dy, col] of [[1.5 * S, "rgba(56,32,2,0.85)"], [-1.1 * S, "rgba(255,250,222,0.95)"], [0, "#dcb455"]] as const) { let x = (AW - total) / 2; tc.fillStyle = col; [...plate.word].forEach((ch, i) => { tc.fillText(ch, x, ty + dy); x += widths[i] + gap; }); } // A thick lower lip. const lip = tc.createLinearGradient(0, AH - 5 * S, 0, AH); lip.addColorStop(0, "rgba(255,246,205,0)"); lip.addColorStop(0.5, "rgba(255,246,205,0.75)"); lip.addColorStop(1, "rgba(80,50,6,0.9)"); tc.fillStyle = lip; tc.fillRect(0, AH - 5 * S, AW, 5 * S); }; // Each envelope is drawn flat, then laid down in perspective strip by strip. const envelope = (name: string) => { const kind = kinds++ % 3, w = 300, h = 200, c = document.createElement("canvas"); c.width = w * 2; c.height = h * 2; const e = c.getContext("2d"); if (!e) return c; e.scale(2, 2); e.fillStyle = kind === 0 ? "#f5efe0" : kind === 1 ? "#c9a26b" : "#dfe9f1"; e.fillRect(0, 0, w, h); for (let i = 0; i < 900; i++) { const v = rand(); e.fillStyle = v > 0.5 ? `rgba(255,255,255,${(v - 0.5) * 0.3})` : `rgba(60,40,10,${(0.5 - v) * 0.16})`; e.fillRect(rand() * w, rand() * h, 1.4, 0.7); } if (kind === 0) { // Airmail edging. e.save(); e.beginPath(); e.rect(0, 0, w, h); e.rect(11, 11, w - 22, h - 22); e.clip("evenodd"); for (let x = -h; x < w + h; x += 26) { e.fillStyle = Math.round(x / 26) % 2 ? "#c7352d" : "#27478f"; e.beginPath(); e.moveTo(x, 0); e.lineTo(x + 13, 0); e.lineTo(x + 13 - h, h); e.lineTo(x - h, h); e.closePath(); e.fill(); } e.restore(); } if (kind === 1) { e.strokeStyle = "rgba(90,58,20,0.5)"; e.lineWidth = 1.2; e.beginPath(); e.moveTo(0, 0); e.lineTo(w / 2, h * 0.36); e.lineTo(w, 0); e.stroke(); } // A stamp, a postmark and the address label that carries the file name. const sx = w - 66, sy = kind === 0 ? 24 : 16; e.fillStyle = "#fbf8ef"; e.fillRect(sx, sy, 42, 50); e.fillStyle = kind === 1 ? "#2f6f62" : "#b8562f"; e.fillRect(sx + 4, sy + 4, 34, 42); e.fillStyle = "rgba(255,255,255,0.85)"; e.beginPath(); e.moveTo(sx + 6, sy + 40); e.lineTo(sx + 17, sy + 20); e.lineTo(sx + 24, sy + 31); e.lineTo(sx + 29, sy + 25); e.lineTo(sx + 36, sy + 40); e.closePath(); e.fill(); e.strokeStyle = "rgba(30,30,40,0.55)"; e.lineWidth = 1.3; e.beginPath(); e.arc(sx - 22, sy + 30, 19, 0, Math.PI * 2); e.stroke(); e.beginPath(); e.arc(sx - 22, sy + 30, 13, 0, Math.PI * 2); e.stroke(); for (let k = 0; k < 4; k++) { e.beginPath(); for (let x = 0; x <= 40; x += 4) e.lineTo(sx - 4 + x, sy + 14 + k * 8 + Math.sin(x * 0.5) * 2); e.stroke(); } e.fillStyle = "#fffdf6"; e.fillRect(34, 92, 190, 70); e.fillStyle = "rgba(0,0,0,0.12)"; e.fillRect(34, 162, 190, 1.5); e.fillStyle = "#22252c"; e.font = '700 17px "Courier New", Courier, monospace'; e.textBaseline = "middle"; e.textAlign = "left"; let label = name; while (label.length > 4 && e.measureText(label).width > 170) label = label.slice(0, -2); e.fillText(label === name ? name : `${label.slice(0, -1)}...`, 44, 116); e.fillStyle = "rgba(34,37,44,0.5)"; e.fillRect(44, 134, 120, 3); e.fillRect(44, 145, 84, 3); return c; }; const TRAVEL = 3.4, ARRIVE = 0.75; // How far in the letter is, 0 to 1: one push, a breath, then the rest drops through. const pushed = (t: number) => { const u = Math.max(0, Math.min(1, (t - ARRIVE) / TRAVEL)); const ease = (x: number) => x * x * (3 - 2 * x); return u < 0.3 ? 0.3 * ease(u / 0.3) : u < 0.56 ? 0.3 + 0.04 * ((u - 0.3) / 0.26) : 0.34 + 0.66 * Math.pow((u - 0.56) / 0.44, 1.8); }; const drawLetter = (l: Letter) => { const a = Math.max(0, Math.min(1, l.t / ARRIVE)), near = 1 - (1 - a) * (1 - a), p = pushed(l.t); if (p >= 1) return; const slot = ay + AH * 0.6, w0 = AW * 0.8, out = 150 * S * (1 - p), n = Math.max(2, Math.ceil(out / 2)); ctx.save(); ctx.translate(cx, slot + (1 - near) * 80 * S); ctx.rotate((1 - near) * -0.07); ctx.scale(1 + (1 - near) * 0.12, 1 + (1 - near) * 0.5); ctx.globalAlpha = Math.min(1, a * 3.2); // Its shadow on the door and the plate, longer the further it still sticks out. ctx.save(); ctx.setTransform(q, 0, 0, q, -6000, 0); ctx.shadowOffsetX = 6000; ctx.shadowColor = `rgba(0,0,0,${0.5 * Math.min(1, (1 - p) * 5)})`; ctx.shadowBlur = (10 + (1 - near) * 22) * q * S; ctx.fillStyle = "#000"; ctx.fillRect(cx - w0 * 0.52, slot + (1 - near) * 130 * S + 6 * S, w0 * 1.04, out * 1.42 + 6 * S); ctx.restore(); for (let i = 0; i < n; i++) { const f0 = i / n, f1 = (i + 1) / n, v0 = p + (1 - p) * f0, v1 = p + (1 - p) * f1, wide = w0 * (1 + 0.17 * (v0 - p)); ctx.drawImage(l.art, 0, v0 * l.art.height, l.art.width, Math.max(1, (v1 - v0) * l.art.height), -wide / 2, out * f0, wide, out / n + 0.7); } const wn = w0 * (1 + 0.17 * (1 - p)); // Shade where it passes under the frame, light along the near edge, then the thickness of the paper. const shade = ctx.createLinearGradient(0, 0, 0, Math.min(out, 26 * S)); shade.addColorStop(0, "rgba(0,0,0,0.62)"); shade.addColorStop(1, "rgba(0,0,0,0)"); ctx.fillStyle = shade; ctx.beginPath(); ctx.moveTo(-w0 / 2, 0); ctx.lineTo(w0 / 2, 0); ctx.lineTo(wn / 2, out); ctx.lineTo(-wn / 2, out); ctx.closePath(); ctx.fill(); ctx.fillStyle = "rgba(255,255,255,0.85)"; ctx.fillRect(-wn / 2, out - 0.4, wn, 1.2 * S); ctx.fillStyle = "rgba(120,104,80,0.95)"; ctx.fillRect(-wn / 2, out + 0.8 * S, wn, 1.5 * S); ctx.restore(); }; const draw = () => { ctx.setTransform(1, 0, 0, 1, 0, 0); ctx.clearRect(0, 0, cv.width, cv.height); ctx.drawImage(fixed, 0, 0); ctx.setTransform(q, 0, 0, q, 0, 0); // The flap: hinged along the top, swinging away from us, so it shortens and narrows a little. const cos = Math.cos(flap.a), sin = Math.sin(flap.a), fh = AH * cos, inset = (AW / 2) * (1 - 1 / (1 + sin * 0.08)); ctx.save(); ctx.beginPath(); ctx.moveTo(ax, ay); ctx.lineTo(ax + AW, ay); ctx.lineTo(ax + AW - inset, ay + fh); ctx.lineTo(ax + inset, ay + fh); ctx.closePath(); ctx.clip(); ctx.drawImage(face, ax, ay, AW, Math.max(1, fh)); const tilt = ctx.createLinearGradient(0, ay, 0, ay + fh); tilt.addColorStop(0, `rgba(0,0,0,${0.12 + sin * 0.5})`); tilt.addColorStop(0.5, `rgba(20,12,0,${sin * 0.42})`); tilt.addColorStop(1, `rgba(20,12,0,${sin * 0.6})`); ctx.fillStyle = tilt; ctx.fillRect(ax, ay, AW, fh); // One soft reflection that slides as the light moves. const gx = ax + AW * (0.32 + light * 0.22); const glare = ctx.createLinearGradient(gx - 70 * S, 0, gx + 90 * S, 0); glare.addColorStop(0, "rgba(255,255,240,0)"); glare.addColorStop(0.45, `rgba(255,255,240,${0.34 * cos})`); glare.addColorStop(1, "rgba(255,255,240,0)"); ctx.fillStyle = glare; ctx.beginPath(); ctx.moveTo(gx - 50 * S, ay); ctx.lineTo(gx + 90 * S, ay); ctx.lineTo(gx + 50 * S, ay + fh); ctx.lineTo(gx - 90 * S, ay + fh); ctx.closePath(); ctx.fill(); ctx.restore(); if (flap.a < 0.04) { ctx.fillStyle = "rgba(40,22,0,0.5)"; ctx.fillRect(ax, ay + AH - 0.6, AW, 1.2); } // The same reflection carried across the fixed plate. const px = cx - PW / 2, py = cy - PH / 2, g2 = px + PW * (0.72 + light * 0.12); ctx.save(); rr(ctx, px, py, PW, PH, 9 * S); ctx.rect(ax - 9 * S, ay - 9 * S, AW + 18 * S, AH + 18 * S); ctx.clip("evenodd"); const sweep = ctx.createLinearGradient(g2 - 60 * S, 0, g2 + 60 * S, 0); sweep.addColorStop(0, "rgba(255,255,240,0)"); sweep.addColorStop(0.5, "rgba(255,255,240,0.3)"); sweep.addColorStop(1, "rgba(255,255,240,0)"); ctx.fillStyle = sweep; ctx.beginPath(); ctx.moveTo(g2 - 20 * S, py); ctx.lineTo(g2 + 100 * S, py); ctx.lineTo(g2 + 20 * S, py + PH); ctx.lineTo(g2 - 100 * S, py + PH); ctx.closePath(); ctx.fill(); ctx.restore(); for (const l of letters) drawLetter(l); }; const layout = () => { const wide = cv.getBoundingClientRect().width >= 560; W = wide ? 720 : 400; H = wide ? 400 : 290; S = wide ? 1 : 0.68; cv.style.aspectRatio = `${W} / ${H}`; for (const c of [cv, fixed]) { c.width = W * q; c.height = H * q; } cx = W / 2; cy = wide ? 118 : 84; PW = 548 * S; PH = 168 * S; AW = 420 * S; AH = 86 * S; ax = cx - AW / 2; ay = cy - AH / 2; kinds = 0; paintFixed(); for (const l of letters) l.art = envelope(l.name); }; const deliver = (l: Letter) => { l.done = true; window.dispatchEvent(new CustomEvent("brass-letterbox-file-upload-delivered", { detail: { name: l.name, demo: l.demo, canvas: cv } })); }; const frame = (now: number) => { raf = 0; const dt = Math.min(0.04, (now - last) / 1000 || 0.016); last = now; clock += dt; if (demo && clock > demoAt && !letters.length) { queue.push({ name: samples[demoIx++ % samples.length].name, demo: true }); demoAt = clock + 6.4; } if (queue.length && !letters.some((l) => pushed(l.t) < 0.62)) { const n = queue.shift(); if (n) letters.push({ art: envelope(n.name), name: n.name, t: 0, demo: n.demo, done: false }); } let pushing = hold ? 0.98 + Math.sin(clock * 31) * 0.025 : peek ? 0.34 : 0; for (const l of letters) { l.t += dt; const p = pushed(l.t); if (l.t > ARRIVE - 0.16 && p < 1) pushing = Math.max(pushing, 1.02 - p * 0.1); if (p >= 1 && !l.done) deliver(l); } letters = letters.filter((l) => !l.done); if (pushing > 0) { flap.v += (170 * (pushing - flap.a) - 20 * flap.v) * dt; } else { flap.v += (-150 * flap.a - 26 - 2.6 * flap.v) * dt; } // let go: the spring throws it shut flap.a += flap.v * dt; if (flap.a < 0) { flap.a = 0; flap.v = Math.abs(flap.v) > 0.5 ? -flap.v * 0.46 : 0; } // it clacks against the frame and bounces if (now - touched > 4000) lightTo = Math.sin(clock * 0.7); light += (lightTo - light) * Math.min(1, dt * 4); draw(); const busy = demo || letters.length || queue.length || flap.a > 0.001 || Math.abs(flap.v) > 0.01 || Math.abs(light - lightTo) > 0.01 || hold || peek; if (busy && seen && !document.hidden) raf = requestAnimationFrame(frame); }; const wake = () => { if (!raf && !reduce) { last = performance.now(); raf = requestAnimationFrame(frame); } }; const still = () => { flap.a = hold ? 0.98 : peek ? 0.34 : demo ? 0.98 : 0; letters = demo ? [{ art: envelope(samples[0].name), name: samples[0].name, t: ARRIVE + TRAVEL * 0.4, demo: true, done: false }] : []; kinds = demo ? 0 : kinds; draw(); }; api.current = { post: (name) => { if (demo) { demo = false; letters = letters.filter((l) => !l.demo); queue = []; } if (reduce) { window.dispatchEvent(new CustomEvent("brass-letterbox-file-upload-delivered", { detail: { name, demo: false, canvas: cv } })); still(); } else { queue.push({ name, demo: false }); wake(); } }, hold: (on) => { hold = on; if (reduce) still(); else wake(); }, peek: (on) => { peek = on; if (reduce) still(); else wake(); }, }; layout(); if (reduce) still(); else wake(); const onMove = (e: PointerEvent) => { const b = cv.getBoundingClientRect(); touched = performance.now(); lightTo = Math.max(-1.4, Math.min(1.4, ((e.clientX - b.left) / b.width - 0.5) * 2.4)); if (reduce) { light = lightTo; draw(); } else wake(); }; window.addEventListener("pointermove", onMove); let width = cv.getBoundingClientRect().width; const ro = new ResizeObserver(() => { const w = cv.getBoundingClientRect().width; const flip = (w >= 560) !== (width >= 560); width = w; if (!flip) return; layout(); if (reduce) still(); else wake(); }); ro.observe(cv); const io = new IntersectionObserver(([entry]) => { seen = entry.isIntersecting; if (seen) wake(); }); io.observe(cv); const onVis = () => { if (!document.hidden) wake(); }; document.addEventListener("visibilitychange", onVis); return () => { cancelAnimationFrame(raf); api.current = null; window.removeEventListener("pointermove", onMove); ro.disconnect(); io.disconnect(); document.removeEventListener("visibilitychange", onVis); }; }, []); // The canvas says when an envelope has gone all the way through; only then does the file join the list. useEffect(() => { const onDelivered = (e: Event) => { const d = (e as CustomEvent<{ name: string; demo: boolean; canvas: HTMLCanvasElement }>).detail; if (d.canvas !== canvas.current) return; const sample = samples.find((s) => s.name === d.name); const next = d.demo ? { key: ++serial.current, name: d.name, size: sample ? sample.size : "" } : waiting.current.shift(); if (!next) return; setPosted((old) => [next, ...old].slice(0, MAX_SHOWN)); if (!d.demo) setNote(`${next.name} delivered`); }; window.addEventListener("brass-letterbox-file-upload-delivered", onDelivered); return () => window.removeEventListener("brass-letterbox-file-upload-delivered", onDelivered); }, []); const take = (files: FileList | null) => { if (!files || !files.length) return; if (!mine) { setMine(true); setPosted([]); } for (const file of Array.from(files)) { waiting.current.push({ key: ++serial.current, name: file.name, size: sizeOf(file.size) }); api.current?.post(file.name); } }; const onPick = (e: ChangeEvent) => { take(e.target.files); e.target.value = ""; }; const onEnter = (e: DragEvent) => { e.preventDefault(); depth.current++; api.current?.hold(true); }; const onLeave = () => { depth.current = Math.max(0, depth.current - 1); if (!depth.current) api.current?.hold(false); }; const onDrop = (e: DragEvent) => { e.preventDefault(); depth.current = 0; api.current?.hold(false); take(e.dataTransfer.files); }; return (

e.preventDefault()} onDragLeave={onLeave} onDrop={onDrop} className="relative flex min-h-[640px] w-full flex-col items-center justify-center overflow-hidden bg-[#12382c] px-4 py-10 sm:min-h-[740px]"> {/* The door: gloss paint with brush marks, a window reflected in it and the edges of two sunk panels. */}

api.current?.peek(true)} onBlur={() => api.current?.peek(false)} className="peer sr-only" /> api.current?.peek(true)} onPointerLeave={() => api.current?.peek(false)} className="block w-full cursor-pointer">

{plate.hint}

{plate.rule}

{f.name} {f.size} Delivered

{note}

); } 60:["$","div",null,{"className":"mt-3 flex min-h-0 min-w-0 flex-1 flex-col gap-3","children":[null,["$","$L61",null,{"files":[{"path":"components/we-inc/brass-letterbox-file-upload-with-a-sprung-flap-that-swallows-envelopes-and-rattles-shut.tsx","content":"$62","type":"registry:component"}],"className":"h-[70svh] min-h-80"}]]}]