64: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"] 65:T384e,"use client"; import { useEffect, useRef } from "react"; import type { CSSProperties } from "react"; // --------------------------------------------------------------------------- // ScreenFloodStroke — a loader / ambient "something is being produced" // affordance modelled on the real screen-printing flood/print stroke cycle, // not a percentage bar. A squeegee makes two passes per cycle across a // printing mesh: a FLOOD stroke (light pressure, left->right) that spreads // ink evenly across the mesh weave without forcing it through, then a PRINT // stroke (firm pressure, blade angled ~18deg from vertical, right->left) // that forces ink through the mesh openings the blade has already crossed // and deposits a real impression on the substrate underneath. The two // passes are deliberately drawn with different weight and different effect // on the surface (a transient low-alpha wash during flood vs a persistent // high-alpha deposit during print) so the two-stroke mechanic stays legible // rather than reading as one generic wipe. // // The mesh fabric itself is a fixed low-alpha grid, always visible under // whatever ink sits on top of it — screen pitch is derived from the // canvas's own smaller dimension via ResizeObserver, finer than the ink // grain since it represents woven mesh, not a printed dot. // // Ink-through is a persistent per-cell field, not a redraw-from-scratch // wash: an opening the print stroke has just crossed jumps straight to the // alpha cap (0.9 of --foreground), then decays exponentially (tau = 2.4s) // toward a floor of 0.2 between impressions — residual staining that never // reaches 0, so a resting card always shows the ghost of at least one prior // impression plus whatever the current stroke is doing. That is what keeps // the loop visibly different at t0 / 2.5s / 5s: t0 catches a bare flood // pass with no fresh deposit yet, 2.5s shows one impression mid-fade under // a new flood pass, and 5s stacks two ghosts of different ages under the // live stroke. // --------------------------------------------------------------------------- export interface ScreenFloodStrokeProps { /** Optional 0-1 determinate progress. When set, ink only takes on * openings within that fraction of the mesh's width — the print stroke * still sweeps the full mesh every cycle and the flood wash keeps * animating unforced, so the component never reads as "finished and * stopped" even once progress reaches 1. Omit for a purely ambient loop. */ progress?: number; /** accessible label for the loader */ "aria-label"?: string; /** extra classes merged onto the rendered root element */ className?: string; /** inline styles merged onto the root element */ style?: CSSProperties; } type RGB = [number, number, number]; function parseColor(raw: string): RGB | null { const s = raw.trim(); if (s.startsWith("#")) { let hex = s.slice(1); if (hex.length === 3) hex = hex.split("").map((c) => c + c).join(""); if (hex.length < 6) return null; const r = parseInt(hex.slice(0, 2), 16); const g = parseInt(hex.slice(2, 4), 16); const b = parseInt(hex.slice(4, 6), 16); return Number.isNaN(r + g + b) ? null : [r, g, b]; } const m = s.match(/rgba?\(\s*([\d.]+)[,\s]+([\d.]+)[,\s]+([\d.]+)/); return m ? [Number(m[1]), Number(m[2]), Number(m[3])] : null; } // --- real numbers from the spec's observed flood/print/dwell cycle -------- const FLOOD_MS = 600; // light pass, left -> right, spreads without printing const PRINT_MS = 900; // firm pass, right -> left, forces ink through const DWELL_MS = 300; // blade lifts clear before the next flood pass const CYCLE_MS = FLOOD_MS + PRINT_MS + DWELL_MS; // 1800 const ANGLE = (18 * Math.PI) / 180; // squeegee tilt from vertical const FLOOD_ALPHA = 0.15; // flat wash alpha while the flood pass is over a cell const MESH_ALPHA = 0.08; // fixed mesh-fabric line alpha, always visible const INK_CAP = 0.9; // alpha a freshly printed opening jumps to const INK_FLOOR = 0.2; // residual-stain floor ink decays toward, never 0 const INK_TAU = 2.4; // seconds, exponential decay time constant // Reduced-motion freeze frame. The spec names FREEZE_PHASE = // "print-stroke-60pct" (squeegee mid print-stroke, ~60% of the mesh printed, // 40% not yet — the most legible "process caught in the act" frame). Taking // that 60%-through-print-stroke intent at face value rather than the spec's // literal t=1.5s (which lands exactly at this cycle's flood(0.6)+print(0.9) // boundary, i.e. a FULLY printed frame with no unprinted mesh left to show) // is what actually reproduces the described 60/40 split; the value below is // derived from the phase math instead of the raw seconds figure. const FREEZE_PHASE = "print-stroke-60pct"; const STATIC_TIME_MS = FLOOD_MS + 0.6 * PRINT_MS; // 1140ms export function ScreenFloodStroke({ progress, "aria-label": ariaLabel = "Loading", className = "", style, }: ScreenFloodStrokeProps) { const rootRef = useRef(null); const canvasRef = useRef(null); const progressRef = useRef(progress); progressRef.current = progress; useEffect(() => { const root = rootRef.current; const canvas = canvasRef.current; if (!root || !canvas) return; const ctx = canvas.getContext("2d"); if (!ctx) return; const mq = window.matchMedia("(prefers-reduced-motion: reduce)"); let reduced = mq.matches; // -- token-derived ink: read at mount, re-derived on theme class change. // No literal fallback — draw() bails out while fg is still null, so // there is genuinely no paint before the first successful token read. -- let fg: RGB | null = null; const derive = () => { const cs = getComputedStyle(document.documentElement); const parsed = parseColor(cs.getPropertyValue("--foreground")); if (parsed) fg = parsed; }; derive(); let w = 0; let h = 0; let dpr = 1; let pitch = 6; let cols = 0; let rows = 0; let ink = new Float32Array(0); // per-cell accumulated print-through alpha let raf = 0; let visible = true; let last = 0; // Only reallocates (and so only wipes accumulated ghosts) when the grid // shape actually changed. A ResizeObserver commonly fires more than // once for the same effective size (initial observe, font-load reflow, // flex settling); without this guard every one of those calls would // erase every ink impression and quietly break the t=2.5s/5s aliveness // this component depends on. const resizeField = () => { const nextCols = Math.max(1, Math.ceil(w / pitch)); const nextRows = Math.max(1, Math.ceil(h / pitch)); if (nextCols === cols && nextRows === rows && ink.length === nextCols * nextRows) return; cols = nextCols; rows = nextRows; ink = new Float32Array(cols * rows); }; // squeegee's local x position at a given row, angled ANGLE from vertical // around the blade's centreline (baseX, h/2) const localX = (baseX: number, cy: number) => baseX + (cy - h / 2) * Math.sin(ANGLE); const step = (timeMs: number, dtMs: number) => { const t = timeMs % CYCLE_MS; const phase: "flood" | "print" | "dwell" = t < FLOOD_MS ? "flood" : t < FLOOD_MS + PRINT_MS ? "print" : "dwell"; let baseX: number; if (phase === "flood") { baseX = (t / FLOOD_MS) * w; } else if (phase === "print") { const p = (t - FLOOD_MS) / PRINT_MS; baseX = w * (1 - p); } else { baseX = 0; } // decay every already-inked cell toward the residual-stain floor — // untouched cells (ink 0) stay 0 until their first impression const decay = Math.exp(-dtMs / 1000 / INK_TAU); for (let i = 0; i < ink.length; i++) { const v = ink[i]; if (v > 0) ink[i] = INK_FLOOR + (v - INK_FLOOR) * decay; } // print stroke deposits: every cell already crossed by the blade // (to the right of its current, leftward-travelling position) jumps // straight to the alpha cap if (phase === "print") { const cap = progressRef.current; for (let j = 0; j < rows; j++) { const cy = j * pitch + pitch / 2; const lx = localX(baseX, cy); for (let i = 0; i < cols; i++) { const cx = i * pitch + pitch / 2; if (cx < lx) continue; // not yet crossed by the blade if (cap !== undefined && cx / w > Math.max(0, Math.min(1, cap))) continue; ink[j * cols + i] = INK_CAP; } } } return { phase, baseX }; }; const draw = (phase: "flood" | "print" | "dwell", baseX: number, timeMs: number) => { if (w <= 0 || h <= 0 || !fg) return; ctx.setTransform(dpr, 0, 0, dpr, 0, 0); ctx.clearRect(0, 0, w, h); // mesh fabric — fixed low alpha, always drawn first so ink sits on // top of it while the grid still shows through the ink's own alpha ctx.strokeStyle = `rgba(${fg[0]},${fg[1]},${fg[2]},${MESH_ALPHA})`; ctx.lineWidth = 1; ctx.beginPath(); for (let i = 0; i <= cols; i++) { const x = Math.min(w, i * pitch); ctx.moveTo(x, 0); ctx.lineTo(x, h); } for (let j = 0; j <= rows; j++) { const y = Math.min(h, j * pitch); ctx.moveTo(0, y); ctx.lineTo(w, y); } ctx.stroke(); // print-through ink, per cell for (let j = 0; j < rows; j++) { for (let i = 0; i < cols; i++) { const v = ink[j * cols + i]; if (v <= 0.005) continue; ctx.fillStyle = `rgba(${fg[0]},${fg[1]},${fg[2]},${v})`; ctx.fillRect(i * pitch, j * pitch, pitch, pitch); } } // flood wash — transient, recomputed live every frame, never stored: // it represents ink sitting on the mesh surface, not yet forced // through, so it has no persistence beyond the current flood pass if (phase === "flood") { ctx.fillStyle = `rgba(${fg[0]},${fg[1]},${fg[2]},${FLOOD_ALPHA})`; for (let j = 0; j < rows; j++) { const cy = j * pitch + pitch / 2; const lx = localX(baseX, cy); const xEnd = Math.max(0, Math.min(w, lx)); if (xEnd > 0) ctx.fillRect(0, j * pitch, xEnd, pitch); } } // squeegee blade itself const barLen = h / Math.cos(ANGLE) + pitch * 2; const barWidth = Math.max(2, Math.min(w, h) * 0.045); let alpha = phase === "print" ? 0.95 : phase === "flood" ? 0.5 : 0; if (phase === "dwell") { const lift = (timeMs % CYCLE_MS) - (FLOOD_MS + PRINT_MS); alpha = Math.max(0, 0.4 * (1 - lift / DWELL_MS)); } if (alpha > 0.01) { ctx.save(); ctx.translate(baseX, h / 2); ctx.rotate(ANGLE); ctx.fillStyle = `rgba(${fg[0]},${fg[1]},${fg[2]},${alpha})`; ctx.fillRect(-barWidth / 2, -barLen / 2, barWidth, barLen); ctx.restore(); } }; const loop = (now: number) => { if (last === 0) last = now; const dt = Math.min(100, now - last); last = now; const { phase, baseX } = step(now, dt); draw(phase, baseX, now); if (!reduced && visible) raf = requestAnimationFrame(loop); else raf = 0; }; const wake = () => { if (raf === 0 && !reduced && visible) { last = 0; raf = requestAnimationFrame(loop); } }; const resize = () => { const rect = root.getBoundingClientRect(); w = rect.width; h = rect.height; dpr = Math.min(2, window.devicePixelRatio || 1); canvas.width = Math.max(1, Math.round(w * dpr)); canvas.height = Math.max(1, Math.round(h * dpr)); // mesh pitch off the container's own smaller dimension — finer than // a printed-dot pitch since it represents woven fabric, not ink pitch = Math.min(9, Math.max(4, Math.min(w, h) / 60)); resizeField(); if (reduced) { const { phase, baseX } = step(STATIC_TIME_MS, 0); draw(phase, baseX, STATIC_TIME_MS); } else { last = 0; const { phase, baseX } = step(0, 0); draw(phase, baseX, 0); } }; resize(); if (!reduced) wake(); const ro = new ResizeObserver(resize); ro.observe(root); const mo = new MutationObserver(() => { derive(); if (reduced) { const { phase, baseX } = step(STATIC_TIME_MS, 0); draw(phase, baseX, STATIC_TIME_MS); } }); mo.observe(document.documentElement, { attributes: true, attributeFilter: ["class"] }); const onReducedChange = () => { reduced = mq.matches; if (reduced) { cancelAnimationFrame(raf); raf = 0; ink.fill(0); resizeField(); const { phase, baseX } = step(STATIC_TIME_MS, 0); draw(phase, baseX, STATIC_TIME_MS); } else { ink.fill(0); wake(); } }; mq.addEventListener("change", onReducedChange); const onVisibility = () => { visible = document.visibilityState === "visible"; if (visible) wake(); else { cancelAnimationFrame(raf); raf = 0; } }; document.addEventListener("visibilitychange", onVisibility); const io = new IntersectionObserver((entries) => { const isVisible = entries[0]?.isIntersecting ?? true; visible = isVisible && document.visibilityState === "visible"; if (visible) wake(); else { cancelAnimationFrame(raf); raf = 0; } }); io.observe(root); return () => { cancelAnimationFrame(raf); ro.disconnect(); mo.disconnect(); io.disconnect(); mq.removeEventListener("change", onReducedChange); document.removeEventListener("visibilitychange", onVisibility); }; }, []); return (

); } ScreenFloodStroke.displayName = "ScreenFloodStroke"; export default ScreenFloodStroke; 63:["$","div",null,{"className":"mt-3 flex min-h-0 min-w-0 flex-1 flex-col gap-3","children":[null,["$","$L64",null,{"files":[{"path":"registry/core/screen-flood-stroke/component.tsx","content":"$65","type":"registry:ui","target":"components/ui/screen-flood-stroke.tsx"}],"className":"h-[70svh] min-h-80"}]]}]