{/* Moving border and soft glow while the model works. */} {/* The surface sits above the glow so only its spill outside the card shows. */} {/* A faint wash behind the header keeps the card recognisable as generated. */}

{title}

{busy && (

{status === "thinking" ? labels.thinking : labels.streaming}

)}

{source && (

{source}

)}

{status === "thinking" ? (

{[92, 100, 78, 56].map((width, index) => (

))}

) : status === "error" ? (

) : status === "idle" ? (

{labels.idle} {onRegenerate && ( )}

) : (

{paragraphs.map((paragraph, index) => { const caret = status === "streaming" && index === paragraphs.length - 1 && (

)} {status === "done" && sources && sources.length > 0 && (

{labels.sources} {sources.map((item, index) => { const content = ( <> {index + 1} {item.label} {item.href && ( )} ); const chip = cn( "inline-flex h-6 max-w-full min-w-0 items-center gap-1.5 rounded-md border bg-card pr-2 pl-1 text-xs transition-colors motion-reduce:transition-none", hoveredSource === item.id && "border-(--insight-accent)/40 bg-(--insight-accent)/[0.06]", ); return item.href ? ( {content} ) : ( {content} ); })}

)}

{status !== "idle" && status !== "error" && (

{busy && onStop ? ( ) : ( onRegenerate && ( ) )} {actions}

)} {/* Announce once: the finished text, not every token. */}

{status === "done" ? plain : status === "thinking" ? labels.thinking : ""}

); } ``` ### `src/registry/overtrue/latency-histogram.tsx` ```tsx "use client"; import * as React from "react"; import { IconX as X } from "@tabler/icons-react"; import { cn } from "@/lib/utils"; export type LatencyScale = "linear" | "log"; export type LatencyRange = [min: number, max: number]; export interface LatencyBucket { /** Inclusive lower edge. */ start: number; /** Exclusive upper edge. */ end: number; count: number; } /** One bar as drawn, passed to `renderTooltip`. */ export interface LatencyHistogramBucket extends LatencyBucket { index: number; /** Share of all requests in this bucket, 0–1. */ share: number; /** Share of requests at or below this bucket's upper edge, 0–1. */ cumulative: number; /** Raw comparison count in the same range, when `compare` is set. */ compare?: number; /** Comparison share of its own total, 0–1. */ compareShare?: number; /** The catch-all bar for values past the linear domain. */ overflow: boolean; /** Whether the bucket lies past `threshold`. */ overThreshold: boolean; } export interface LatencyHistogramColors { bar: string; compare: string; threshold: string; marker: string; selection: string; } export interface LatencyHistogramProps extends Omit< React.ComponentProps<"div">, "title" | "children" | "color" > { /** Raw samples. Bucketed for you, with exact percentiles. */ values?: number[]; /** Pre-bucketed counts, used when `values` is not given. Percentiles are interpolated. */ buckets?: LatencyBucket[]; /** A comparison distribution, e.g. yesterday. Scaled to the main total so shapes compare. */ compare?: number[] | LatencyBucket[]; /** Name of the comparison in the legend and tooltip. */ compareLabel?: string; /** Name of the main series in the legend. */ seriesLabel?: string; /** Draw the comparison as a stepped line or as outlined bars. */ compareStyle?: "step" | "outline"; /** Percentiles to mark, as numbers such as 50 or 99.9. */ percentiles?: number[]; /** Latency objective. The slow tail past it is shaded and measured. */ threshold?: number; thresholdLabel?: string; /** X scale. Pass with `onScaleChange` to control the built-in toggle. */ scale?: LatencyScale; defaultScale?: LatencyScale; onScaleChange?: (scale: LatencyScale) => void; /** Show the linear/log toggle. Defaults to true. */ showScaleToggle?: boolean; /** Brushed range. Pass `null` for none; leave undefined to let the component manage it. */ range?: LatencyRange | null; defaultRange?: LatencyRange | null; onRangeChange?: (range: LatencyRange | null) => void; title?: React.ReactNode; description?: React.ReactNode; /** Controls placed at the top right, before the scale toggle. */ actions?: React.ReactNode; /** Unit of the values. Defaults to "ms"; ms readouts switch to seconds from 1,000. */ unit?: string; /** Formats latencies in readouts, markers, and ticks. */ valueFormatter?: (value: number) => string; /** Target number of bars. Defaults to 40. */ bucketCount?: number; /** Fix the latency domain. Linear charts otherwise end near p99.5 and gather the rest in an overflow bar. */ domain?: LatencyRange; /** Plot height in pixels. Defaults to a third of the plot width, between 140 and 220. */ height?: number; /** Override any series color with a CSS color. */ colors?: Partial; /** Replaces the hover tooltip content. */ renderTooltip?: (bucket: LatencyHistogramBucket) => React.ReactNode; /** Show the percentile summary above the plot. Defaults to true. */ showSummary?: boolean; } /* ------------------------------------------------------------------------ */ /* Formatting */ /* ------------------------------------------------------------------------ */ const tidy = (value: number) => +value.toPrecision(12); const compact = new Intl.NumberFormat("en-US", { notation: "compact", maximumFractionDigits: 1, }); const whole = new Intl.NumberFormat("en-US"); function makeFormatter(unit: string) { const tight = unit.length <= 2; const join = (text: string, u: string) => u ? `${text}${tight ? "" : " "}${u}` : text; return (value: number) => { if (!Number.isFinite(value)) return "—"; const a = Math.abs(value); if (unit === "ms" && a >= 1000) return `${tidy(+(value / 1000).toFixed(a >= 10_000 ? 1 : 2))}s`; const digits = a >= 100 || a === 0 ? 0 : a >= 10 ? 1 : a >= 1 ? 2 : 3; return join(String(tidy(+value.toFixed(digits))), unit); }; } function makeTickFormatter(unit: string) { const tight = unit.length <= 2; return (value: number) => { if (value === 0) return "0"; if (unit === "ms" && Math.abs(value) >= 1000) return `${tidy(value / 1000)}s`; return `${tidy(value)}${tight ? "" : " "}${unit}`; }; } function percentLabel(share: number) { const pct = share * 100; if (pct === 0) return "0%"; if (pct < 0.1) return "<0.1%"; if (pct > 99.9 && pct < 100) return ">99.9%"; return `${pct >= 10 ? pct.toFixed(1) : pct.toFixed(2)}%`; } function niceStep(raw: number) { if (!(raw > 0)) return 1; const magnitude = 10 ** Math.floor(Math.log10(raw)); const r = raw / magnitude; return ( (r <= 1 ? 1 : r <= 2 ? 2 : r <= 2.5 ? 2.5 : r <= 5 ? 5 : 10) * magnitude ); } /** Round down or up to the nearest 1, 2, or 5 times a power of ten. */ function nice125(value: number, up: boolean) { const magnitude = 10 ** Math.floor(Math.log10(value)); const r = value / magnitude; const steps = [1, 2, 5, 10]; if (up) return (steps.find((s) => s >= r - 1e-9) ?? 10) * magnitude; return ([...steps].reverse().find((s) => s <= r + 1e-9) ?? 1) * magnitude; } function lowerBound(sorted: Float64Array, value: number) { let lo = 0; let hi = sorted.length; while (lo < hi) { const mid = (lo + hi) >> 1; if (sorted[mid] < value) lo = mid + 1; else hi = mid; } return lo; } function upperBound(sorted: Float64Array, value: number) { let lo = 0; let hi = sorted.length; while (lo < hi) { const mid = (lo + hi) >> 1; if (sorted[mid] <= value) lo = mid + 1; else hi = mid; } return lo; } /* ------------------------------------------------------------------------ */ /* Model */ /* ------------------------------------------------------------------------ */ interface Bar extends LatencyBucket { overflow: boolean; /** Left and right edges as 0–1 positions. */ x0: number; x1: number; } interface Distribution { sorted: Float64Array | null; buckets: LatencyBucket[] | null; total: number; min: number; max: number; mean: number; } function distributionOf( values?: number[], buckets?: LatencyBucket[], ): Distribution { if (values) { const clean = values.filter((value) => Number.isFinite(value)); const sorted = Float64Array.from(clean).sort(); let sum = 0; for (const value of sorted) sum += value; return { sorted, buckets: null, total: sorted.length, min: sorted.length ? sorted[0] : 0, max: sorted.length ? sorted[sorted.length - 1] : 0, mean: sorted.length ? sum / sorted.length : 0, }; } const list = (buckets ?? []) .filter( (b) => Number.isFinite(b.start) && Number.isFinite(b.end) && b.end > b.start, ) .sort((a, b) => a.start - b.start); let total = 0; let sum = 0; for (const b of list) { total += Math.max(0, b.count); sum += (Math.max(0, b.count) * (b.start + b.end)) / 2; } return { sorted: null, buckets: list, total, min: list.length ? list[0].start : 0, max: list.length ? list[list.length - 1].end : 0, mean: total ? sum / total : 0, }; } /** Nearest-rank percentile from samples; interpolated inside buckets otherwise. */ function quantile(d: Distribution, p: number) { if (!d.total) return 0; if (d.sorted) return d.sorted[ Math.min(d.total - 1, Math.max(0, Math.ceil(p * d.total) - 1)) ]; const target = p * d.total; let cumulative = 0; for (const b of d.buckets!) { if (cumulative + b.count >= target && b.count > 0) return b.start + ((target - cumulative) / b.count) * (b.end - b.start); cumulative += b.count; } return d.max; } /** Requests with a value in [a, b]. Partial buckets count in proportion. */ function countBetween(d: Distribution, a: number, b: number) { if (d.sorted) return upperBound(d.sorted, b) - lowerBound(d.sorted, a); let count = 0; for (const bucket of d.buckets!) { const overlap = Math.min(b, bucket.end) - Math.max(a, bucket.start); if (overlap > 0) count += (bucket.count * overlap) / (bucket.end - bucket.start); } return count; } function countAbove(d: Distribution, value: number) { if (d.sorted) return d.total - upperBound(d.sorted, value); return countBetween(d, value, Infinity); } interface Layout { bars: Bar[]; lo: number; hi: number; /** Largest value covered, including the overflow bar. */ top: number; pos: (value: number) => number; inv: (x: number) => number; } function layoutOf( d: Distribution, scale: LatencyScale, bucketCount: number, reach: number, domain?: LatencyRange, ): Layout { const count = Math.max(4, Math.round(bucketCount)); // Pre-bucketed data keeps its own edges. if (d.buckets) { const list = d.buckets; const first = list[0]?.start ?? 0; const last = list[list.length - 1]?.end ?? 1; if (scale === "log") { const positive = list.find((b) => b.start > 0)?.start ?? list[0]?.end ?? 1; const lo = first > 0 ? first : positive / 2; const span = Math.log(last / lo) || 1; const pos = (v: number) => Math.min(1, Math.max(0, Math.log(Math.max(v, lo) / lo) / span)); const inv = (x: number) => lo * Math.exp(x * span); return { bars: list.map((b) => ({ ...b, overflow: false, x0: pos(b.start), x1: pos(b.end), })), lo, hi: last, top: last, pos, inv, }; } const span = last - first || 1; const pos = (v: number) => Math.min(1, Math.max(0, (v - first) / span)); const inv = (x: number) => first + x * span; return { bars: list.map((b) => ({ ...b, overflow: false, x0: pos(b.start), x1: pos(b.end), })), lo: first, hi: last, top: last, pos, inv, }; } const sorted = d.sorted!; if (scale === "log") { const positive = sorted[lowerBound(sorted, Number.MIN_VALUE)] ?? 1; const lo = domain?.[0] && domain[0] > 0 ? domain[0] : nice125(Math.max(positive, 1e-9), false); const hi = Math.max( domain?.[1] ?? nice125(Math.max(d.max, lo * 10), true), lo * 1.0001, ); const span = Math.log(hi / lo); const step = span / count; const bars: Bar[] = Array.from({ length: count }, (_, i) => ({ start: lo * Math.exp(i * step), end: lo * Math.exp((i + 1) * step), count: 0, overflow: false, x0: i / count, x1: (i + 1) / count, })); for (const v of sorted) { const i = v <= lo ? 0 : Math.floor(Math.log(v / lo) / step); bars[Math.min(count - 1, Math.max(0, i))].count += 1; } const pos = (v: number) => Math.min(1, Math.max(0, Math.log(Math.max(v, lo) / lo) / span)); return { bars, lo, hi, top: hi, pos, inv: (x) => lo * Math.exp(x * span) }; } const lo = domain?.[0] ?? (d.min >= 0 ? 0 : -niceStep(-d.min)); const wanted = domain?.[1] ?? Math.max(reach, lo + 1e-9); const step = niceStep((wanted - lo) / count); const n = Math.max(1, Math.ceil((wanted - lo) / step - 1e-9)); const hi = lo + n * step; const overflowCount = d.total - upperBound(sorted, hi); const units = overflowCount > 0 ? n + 1.7 : n; const bars: Bar[] = Array.from({ length: n }, (_, i) => ({ start: tidy(lo + i * step), end: tidy(lo + (i + 1) * step), count: 0, overflow: false, x0: i / units, x1: (i + 1) / units, })); for ( let k = lowerBound(sorted, lo), end = upperBound(sorted, hi); k < end; k++ ) bars[Math.min(n - 1, Math.floor((sorted[k] - lo) / step))].count += 1; // Values below a fixed domain fold into the first bar. bars[0].count += lowerBound(sorted, lo); const top = Math.max(hi, d.max); if (overflowCount > 0) bars.push({ start: hi, end: top, count: overflowCount, overflow: true, x0: (n + 0.7) / units, x1: 1, }); const mainEnd = n / units; const overflowStart = (n + 0.7) / units; const pos = (v: number) => { if (v <= hi) return Math.max(0, ((v - lo) / (hi - lo)) * mainEnd); if (overflowCount <= 0 || top <= hi) return mainEnd; return Math.min( 1, overflowStart + ((v - hi) / (top - hi)) * (1 - overflowStart), ); }; const inv = (x: number) => { if (x <= mainEnd) return lo + (x / mainEnd) * (hi - lo); if (x < overflowStart || overflowCount <= 0) return hi; return hi + ((x - overflowStart) / (1 - overflowStart)) * (top - hi); }; return { bars, lo, hi, top, pos, inv }; } /** Bin a comparison into the main bars' edges. */ function binCompare(compare: number[] | LatencyBucket[], bars: Bar[]) { const counts = new Array(bars.length).fill(0); if (!bars.length) return { counts, total: 0 }; const find = (v: number) => { let lo = 0; let hi = bars.length - 1; while (lo < hi) { const mid = (lo + hi + 1) >> 1; if (bars[mid].start <= v) lo = mid; else hi = mid - 1; } return lo; }; let total = 0; for (const item of compare as (number | LatencyBucket)[]) { if (typeof item === "number") { if (!Number.isFinite(item)) continue; counts[find(item)] += 1; total += 1; } else if (Number.isFinite(item.count)) { counts[find((item.start + item.end) / 2)] += item.count; total += item.count; } } return { counts, total }; } /* ------------------------------------------------------------------------ */ /* Hooks */ /* ------------------------------------------------------------------------ */ function useReducedMotion() { return React.useSyncExternalStore( (onChange) => { const query = window.matchMedia("(prefers-reduced-motion: reduce)"); query.addEventListener("change", onChange); return () => query.removeEventListener("change", onChange); }, () => window.matchMedia("(prefers-reduced-motion: reduce)").matches, () => false, ); } function useControllable( value: T | undefined, defaultValue: T, onChange?: (value: T) => void, ) { const [inner, setInner] = React.useState(defaultValue); const controlled = value !== undefined; const set = React.useCallback( (next: T) => { if (!controlled) setInner(next); onChange?.(next); }, [controlled, onChange], ); return [controlled ? value : inner, set] as const; } const focusRing = "outline-none focus-visible:ring-2 focus-visible:ring-ring/50"; const percentileName = (p: number) => `p${tidy(p)}`; /* ------------------------------------------------------------------------ */ /* LatencyHistogram */ /* ------------------------------------------------------------------------ */ /** * A latency distribution: bucketed requests with percentile markers, an SLO tail, * an optional comparison, and brushing to measure any range. */ export function LatencyHistogram({ values, buckets, compare, compareLabel = "Previous", seriesLabel = "Current", compareStyle = "step", percentiles = [50, 90, 95, 99], threshold, thresholdLabel = "SLO", scale: scaleProp, defaultScale = "linear", onScaleChange, showScaleToggle = true, range: rangeProp, defaultRange = null, onRangeChange, title, description, actions, unit = "ms", valueFormatter, bucketCount = 40, domain, height, colors: colorsProp, renderTooltip, showSummary = true, className, ...props }: LatencyHistogramProps) { const id = React.useId(); const reduced = useReducedMotion(); const format = React.useMemo( () => valueFormatter ?? makeFormatter(unit), [valueFormatter, unit], ); const formatTick = React.useMemo( () => valueFormatter ?? makeTickFormatter(unit), [valueFormatter, unit], ); const colors: LatencyHistogramColors = { bar: "var(--color-chart-1)", compare: "var(--color-muted-foreground)", threshold: "var(--color-destructive)", marker: "var(--color-foreground)", selection: "var(--color-primary)", ...colorsProp, }; const [scale, setScale] = useControllable( scaleProp, defaultScale, onScaleChange, ); const [range, setRange] = useControllable( rangeProp, defaultRange, onRangeChange, ); const hasThreshold = threshold != null && Number.isFinite(threshold); const dist = React.useMemo( () => distributionOf(values, buckets), [values, buckets], ); const sortedPercentiles = React.useMemo( () => [...new Set(percentiles.filter((p) => p > 0 && p < 100))].sort( (a, b) => a - b, ), [percentiles], ); const empty = dist.total === 0; const marks = React.useMemo( () => dist.total === 0 ? [] : sortedPercentiles.map((p) => ({ p, value: quantile(dist, p / 100) })), [dist, sortedPercentiles], ); // Linear charts end just past the slow tail (and the SLO); the rest lands in an overflow bar. const reach = Math.max( quantile(dist, 0.995), (marks[marks.length - 1]?.value ?? 0) * 1.04, hasThreshold ? threshold! * 1.12 : 0, ); const layout = React.useMemo( () => layoutOf(dist, scale, bucketCount, reach, domain), [dist, scale, bucketCount, reach, domain], ); const { bars, pos, inv } = layout; const comparison = React.useMemo(() => { if (!compare?.length) return null; const { counts, total } = binCompare(compare, bars); const percentilesOf = (() => { if (typeof compare[0] === "number") { const d = distributionOf(compare as number[]); return sortedPercentiles.map((p) => quantile(d, p / 100)); } const d = distributionOf(undefined, compare as LatencyBucket[]); return sortedPercentiles.map((p) => quantile(d, p / 100)); })(); const factor = total ? dist.total / total : 0; return { counts, total, scaled: counts.map((c) => c * factor), percentiles: percentilesOf, }; }, [compare, bars, dist.total, sortedPercentiles]); const maxCount = Math.max( 1, ...bars.map((b) => b.count), ...(comparison?.scaled ?? [0]), ); // The tallest bar fills the plot; gridlines sit at round counts below it. const yMax = maxCount * 1.06; const yStep = niceStep(maxCount / 3.2); const yTicks = Array.from( { length: Math.floor(yMax / yStep + 1e-9) + 1 }, (_, i) => tidy(i * yStep), ); const over = hasThreshold ? countAbove(dist, threshold!) : 0; const overShare = dist.total ? over / dist.total : 0; const thresholdX = hasThreshold ? pos(threshold!) : 1; const cumulative = React.useMemo(() => { let running = 0; return bars.map((b) => (running += b.count) / (dist.total || 1)); }, [bars, dist.total]); const bucketAt = (index: number): LatencyHistogramBucket => { const b = bars[index]; return { index, start: b.start, end: b.end, count: b.count, share: dist.total ? b.count / dist.total : 0, cumulative: cumulative[index] ?? 0, compare: comparison ? comparison.counts[index] : undefined, compareShare: comparison?.total ? comparison.counts[index] / comparison.total : undefined, overflow: b.overflow, overThreshold: hasThreshold && b.start >= threshold!, }; }; /* -------------------------------------------------------------- layout */ const plotRef = React.useRef(null); const [width, setWidth] = React.useState(0); React.useLayoutEffect(() => { const el = plotRef.current; if (!el) return; const measure = () => setWidth(el.clientWidth); measure(); const observer = new ResizeObserver(measure); observer.observe(el); return () => observer.disconnect(); }, []); const W = width || 560; // Percentile chips stack into lanes only when they would collide. // With the summary on show, crowded chips drop their values, which the summary repeats. const chips = React.useMemo(() => { const place = (withValue: boolean) => { const lanes: number[] = []; return marks.map((mark) => { const text = withValue ? `${percentileName(mark.p)} ${format(mark.value)}` : percentileName(mark.p); const w = text.length * 6.1 + 14; const x = pos(mark.value) * W; const left = Math.min(Math.max(0, x - w / 2), Math.max(0, W - w)); let lane = lanes.findIndex((right) => right + 4 <= left); if (lane < 0) lane = lanes.push(0) - 1; lanes[lane] = left + w; return { ...mark, x, left, lane, w, withValue }; }); }; const full = place(true); if (!showSummary || full.every((chip) => chip.lane === 0)) return full; return place(false); }, [marks, pos, W, format, showSummary]); const laneCount = Math.max(1, ...chips.map((chip) => chip.lane + 1)); const chipTop = laneCount * 20 + 6; // Without a fixed height the plot follows the card width, shorter on narrow cards. const H = Math.max( 80, height ?? Math.round(Math.min(220, Math.max(140, W * 0.34))), ); const barsHeight = H - chipTop; const xTicks = React.useMemo(() => { const ticks: number[] = []; if (empty) return ticks; if (scale === "log" || dist.buckets) { if (scale === "log") { const lo = layout.lo; const hi = layout.hi; const candidates: number[] = []; for ( let e = Math.floor(Math.log10(lo)); e <= Math.ceil(Math.log10(hi)); e++ ) for (const m of [1, 2, 5]) { const v = tidy(m * 10 ** e); if (v >= lo * 0.999 && v <= hi * 1.001) candidates.push(v); } // Thin out 2s and then 5s until labels have room. for (const keep of [[1, 2, 5], [1, 5], [1]]) { const list = candidates.filter((v) => keep.includes( Math.round(v / 10 ** Math.floor(Math.log10(v) + 1e-9)), ), ); let ok = true; for (let i = 1; i < list.length; i++) if ((pos(list[i]) - pos(list[i - 1])) * W < 44) ok = false; if (ok || keep.length === 1) return list; } } } const lo = layout.lo; const hi = layout.hi; const step = niceStep((hi - lo) / Math.max(2, Math.floor(W / 76))); for ( let v = Math.ceil(lo / step - 1e-9) * step; v <= hi + step * 1e-6; v += step ) ticks.push(tidy(v)); return ticks; }, [scale, dist.buckets, layout, pos, W, empty]); /* ----------------------------------------------------------- animation */ // Bars grow in on mount and whenever the bucket layout changes; data updates tween. // Keyed on scale and bar count only, so live data with a drifting tail tweens instead of regrowing. const structure = `${scale}:${bars.length}`; const [grown, setGrown] = React.useState(null); const [intro, setIntro] = React.useState(true); React.useEffect(() => { if (reduced) { setGrown(structure); setIntro(false); return; } setIntro(true); let frame = requestAnimationFrame(() => { frame = requestAnimationFrame(() => setGrown(structure)); }); const timer = window.setTimeout( () => setIntro(false), 900 + bars.length * 9, ); return () => { cancelAnimationFrame(frame); window.clearTimeout(timer); }; }, [structure, reduced, bars.length]); const isGrown = grown === structure; /* --------------------------------------------------------- interaction */ const [hover, setHover] = React.useState(null); const [active, setActive] = React.useState(null); const [brush, setBrush] = React.useState(null); const drag = React.useRef<{ x: number; value: number; moved: boolean; } | null>(null); const anchor = React.useRef(null); const xToFraction = (clientX: number) => { const rect = plotRef.current!.getBoundingClientRect(); return Math.min(1, Math.max(0, (clientX - rect.left) / (rect.width || 1))); }; const barAt = (x: number) => { for (let i = 0; i < bars.length; i++) if (x >= bars[i].x0 && x <= bars[i].x1) return i; // In a gap: the nearest bar. let best = -1; let distance = Infinity; bars.forEach((b, i) => { const dd = Math.min(Math.abs(x - b.x0), Math.abs(x - b.x1)); if (dd < distance) { distance = dd; best = i; } }); return best < 0 ? null : best; }; const clampRange = (a: number, b: number): LatencyRange => [ Math.min(a, b), Math.max(a, b), ]; const onPointerDown = (event: React.PointerEvent) => { if (event.button !== 0 || !bars.length) return; const x = xToFraction(event.clientX); drag.current = { x: event.clientX, value: inv(x), moved: false }; event.currentTarget.setPointerCapture(event.pointerId); }; const onPointerMove = (event: React.PointerEvent) => { if (!bars.length) return; const x = xToFraction(event.clientX); const d = drag.current; if (d) { if (!d.moved && Math.abs(event.clientX - d.x) > 3) d.moved = true; if (d.moved) { setBrush(clampRange(d.value, inv(x))); setHover(null); return; } } setHover(barAt(x)); }; const onPointerUp = (event: React.PointerEvent) => { const d = drag.current; drag.current = null; if (!d) return; if (d.moved) { const next = clampRange(d.value, inv(xToFraction(event.clientX))); setBrush(null); setRange(next[1] - next[0] > 0 ? next : null); } else if (range) setRange(null); }; const onKeyDown = (event: React.KeyboardEvent) => { if (!bars.length) return; const current = active ?? -1; const step = (delta: number) => Math.min( bars.length - 1, Math.max( 0, current < 0 ? (delta > 0 ? 0 : bars.length - 1) : current + delta, ), ); let next: number | null = null; if (event.key === "ArrowRight") next = step(1); else if (event.key === "ArrowLeft") next = step(-1); else if (event.key === "Home") next = 0; else if (event.key === "End") next = bars.length - 1; else if (event.key === "Enter" && current >= 0) { setRange([bars[current].start, bars[current].end]); event.preventDefault(); return; } else if (event.key === "Escape") { if (range) setRange(null); else setActive(null); anchor.current = null; event.preventDefault(); return; } if (next == null) return; event.preventDefault(); if (event.shiftKey) { if (anchor.current == null) anchor.current = current < 0 ? next : current; const a = Math.min(anchor.current, next); const b = Math.max(anchor.current, next); setRange([bars[a].start, bars[b].end]); } else anchor.current = null; setActive(next); }; const shownRange = brush ?? range; const rangeCount = shownRange ? countBetween(dist, shownRange[0], shownRange[1]) : 0; const rangeShare = dist.total ? rangeCount / dist.total : 0; const focusIndex = hover ?? active; const focusBucket = focusIndex != null && bars[focusIndex] ? bucketAt(focusIndex) : null; /* -------------------------------------------------------------- render */ const describeBucket = (b: LatencyHistogramBucket) => `${b.overflow ? `${format(b.start)} and above` : `${format(b.start)} to ${format(b.end)}`}: ${whole.format(Math.round(b.count))} requests, ${percentLabel(b.share)}`; const summaryText = [ `${whole.format(Math.round(dist.total))} requests.`, marks .map((mark) => `${percentileName(mark.p)} ${format(mark.value)}`) .join(", ") + ".", hasThreshold ? `${percentLabel(overShare)} over the ${thresholdLabel} of ${format(threshold!)}.` : "", ] .filter(Boolean) .join(" "); const hasHeader = title != null || description != null || actions != null || showScaleToggle; const transition = intro ? "transform 760ms cubic-bezier(.16,1,.3,1)" : "transform 520ms cubic-bezier(.16,1,.3,1)"; const barFill = (color: string) => `color-mix(in oklab, ${color} 72%, var(--color-card))`; // The comparison as one stepped path across the bars. const comparePath = React.useMemo(() => { if (!comparison || compareStyle !== "step") return null; let path = ""; let previousEnd = -1; bars.forEach((b, i) => { const y = 100 - (comparison.scaled[i] / yMax) * 100; const x0 = b.x0 * 1000; const x1 = b.x1 * 1000; if (Math.abs(x0 - previousEnd) > 0.5) path += `${path ? "V100" : ""}M${x0.toFixed(2)} 100`; path += `V${y.toFixed(2)}H${x1.toFixed(2)}`; previousEnd = x1; }); return path + "V100"; }, [comparison, compareStyle, bars, yMax]); return (

{hasHeader && (

{title != null && (

{title}

)} {description != null && (

{description}

)}

{actions} {showScaleToggle && (

{(["linear", "log"] as const).map((option) => ( ))}

)}

)} {showSummary && (marks.length > 0 || hasThreshold) && ( // Narrow cards trade the stat grid for one line, so the distribution stays in view.

{percentileName(mark.p)}: {format(mark.value)}; 0 ? "text-destructive" : "text-emerald-700 dark:text-emerald-400", )} > {delta > 0 ? "▲" : "▼"} {format(Math.abs(delta))}; 0 ? "text-destructive" : "text-emerald-700 dark:text-emerald-400", )} > {percentLabel(overShare)}
over {thresholdLabel}

)} {showSummary && (marks.length > 0 || hasThreshold) && ( )}

{ drag.current = null; setBrush(null); }} onPointerLeave={() => { if (!drag.current) setHover(null); }} onKeyDown={onKeyDown} onBlur={() => setActive(null)} className={cn( "relative cursor-crosshair touch-pan-y rounded-sm select-none", "outline-none focus-visible:ring-2 focus-visible:ring-ring/50 focus-visible:ring-offset-4 focus-visible:ring-offset-card", )} style={{ height: H }} > {empty && (

No requests to show.

)} {/* Value grid */} {/* SLO tail */} {hasThreshold && thresholdX < 1 && (

)} {/* Bars */}

{comparison && compareStyle === "outline" && bars.map((b, i) => ( ))} {bars.map((b, i) => { const h = b.count / yMax; const inRange = shownRange ? b.end > shownRange[0] && b.start < shownRange[1] : true; const dim = (focusIndex != null && focusIndex !== i) || !inRange; const split = hasThreshold && b.start < threshold! && b.end > threshold!; const hot = hasThreshold && b.start >= threshold!; const color = hot ? colors.threshold : colors.bar; const cut = split ? ((thresholdX - b.x0) / (b.x1 - b.x0)) * 100 : 0; const fill = split ? `linear-gradient(to right, ${barFill(colors.bar)} ${cut}%, ${barFill(colors.threshold)} ${cut}%)` : barFill(color); const cap = split ? `linear-gradient(to right, ${colors.bar} ${cut}%, ${colors.threshold} ${cut}%)` : color; return ( {/* The cap is drawn unscaled so it stays a crisp line at any height. */} {b.count > 0 && ( )} ); })} {comparePath && ( )}

{/* Selection */} {shownRange && ( )} {/* Threshold line */} {hasThreshold && thresholdX < 1 && ( )} {/* Percentile markers */} {chips.map((chip) => { const hot = hasThreshold && chip.value > threshold!; const color = hot ? colors.threshold : colors.marker; return ( ); })} {/* Tooltip */} {focusBucket && !brush && (

{renderTooltip ? ( renderTooltip(focusBucket) ) : ( <>

{focusBucket.overflow ? `≥ ${format(focusBucket.start)}` : `${format(focusBucket.start)} – ${format(focusBucket.end)}`}

{whole.format(Math.round(focusBucket.count))} {percentLabel(focusBucket.share)}

{percentLabel(focusBucket.cumulative)} at or faster

{focusBucket.compare != null && comparison && (

)} )}

)}

{/* Latency axis */}

{xTicks.map((tick, i) => { const x = pos(tick); if (x > layout.pos(layout.hi) + 1e-6) return null; return ( 0.97 ? "-translate-x-full" : "-translate-x-1/2", )} style={{ left: `${x * 100}%` }} > {formatTick(tick)} ); })} {bars[bars.length - 1]?.overflow && ( + )}

{shownRange ? ( <> {format(shownRange[0])} – {format(shownRange[1])} {percentLabel(rangeShare)} {whole.format(Math.round(rangeCount))} of{" "} {whole.format(Math.round(dist.total))} requests {!brush && ( )} ) : ( {whole.format(Math.round(dist.total))} {" "} requests mean{" "} {format(dist.mean)} max{" "} {format(dist.max)} {" "} · drag to measure a range )}

{comparison && (

)}

{comparison && } {bars.map((b, i) => b.count > 0 || comparison?.counts[i] ? ( {comparison && ( )} ) : null, )}

{summaryText}
Latency	Requests	{compareLabel}
{b.overflow ? `${format(b.start)} and above` : `${format(b.start)} to ${format(b.end)}`}	{whole.format(Math.round(b.count))}	{whole.format(Math.round(comparison.counts[i]))}

{active != null && bars[active] ? describeBucket(bucketAt(active)) : range ? `Selected ${format(range[0])} to ${format(range[1])}: ${percentLabel(dist.total ? countBetween(dist, range[0], range[1]) / dist.total : 0)} of requests.` : ""}

); } ``` ### `src/registry/overtrue/trace-waterfall.tsx` ```tsx "use client"; import * as React from "react"; import { IconAlertTriangleFilled as AlertTriangle, IconChevronRight as ChevronRight, IconFoldDown as FoldDown, IconFoldUp as FoldUp, IconRoute as Route, IconX as X, IconZoomReset as ZoomReset, } from "@tabler/icons-react"; import { cn } from "@/lib/utils"; export type TraceSpanStatus = "ok" | "error"; export type TraceSpanAttributeValue = string | number | boolean; export interface TraceSpan { id: string; /** The calling span. Spans without a known parent are drawn as roots. */ parentId?: string | null; /** Operation name, e.g. "POST /api/checkout" or "SELECT orders". */ name: string; /** Emitting service. Spans of one service share a color. */ service: string; /** Milliseconds from the start of the trace. */ start: number; /** Milliseconds. */ duration: number; status?: TraceSpanStatus; attributes?: Record; } /** Everything derived about one span, passed to `renderDetail`. */ export interface TraceSpanInfo { span: TraceSpan; parent: TraceSpan | null; children: TraceSpan[]; depth: number; /** All spans below this one, at any depth. */ descendantCount: number; /** Time not covered by any child span, in milliseconds. */ selfTime: number; /** Duration as a 0–1 share of the whole trace. */ share: number; /** Whether the span is on the trace's critical path. */ critical: boolean; /** The resolved service color. */ color: string; /** Start and end of the whole trace, in milliseconds. */ trace: { start: number; end: number; duration: number }; } export type TraceTimeRange = [start: number, end: number]; export interface TraceWaterfallProps extends Omit< React.ComponentProps<"div">, "title" | "children" > { spans: TraceSpan[]; title?: React.ReactNode; description?: React.ReactNode; /** Controls placed at the top right, before the built-in tools. */ actions?: React.ReactNode; /** Selected span. Pass `null` for none; leave undefined to let the component manage it. */ selectedId?: string | null; defaultSelectedId?: string | null; onSelectedChange?: (id: string | null, span: TraceSpan | null) => void; /** Emphasise the longest blocking chain. Pass with `onHighlightCriticalPathChange` to control it. */ highlightCriticalPath?: boolean; defaultHighlightCriticalPath?: boolean; onHighlightCriticalPathChange?: (highlight: boolean) => void; /** Spans that start collapsed. */ defaultCollapsedIds?: string[]; /** Colors by service name. Unlisted services take the chart palette in order of appearance. */ serviceColors?: Record; /** Formats every duration and offset except axis ticks. */ durationFormatter?: (ms: number) => string; /** Replaces the attribute table in the detail panel. Compose `TraceSpanAttributes` to keep it. */ renderDetail?: (span: TraceSpan, info: TraceSpanInfo) => React.ReactNode; /** Row height in pixels. Defaults to 28. */ rowHeight?: number; /** Maximum height of the scrolling span list in pixels. Defaults to 360. */ height?: number; /** Width of the span tree as a 0.2–0.7 share of the card. Drag the divider to change it. */ treeWidth?: number; /** Show the whole-trace minimap above the list. Defaults to true. */ showOverview?: boolean; /** Show the service legend, which doubles as a filter. Defaults to true. */ showLegend?: boolean; /** Called when the visible time range changes, with `null` when zoom resets. */ onZoomChange?: (range: TraceTimeRange | null) => void; } /* ------------------------------------------------------------------------ */ /* Formatting */ /* ------------------------------------------------------------------------ */ function formatDuration(ms: number) { if (!Number.isFinite(ms)) return "—"; const a = Math.abs(ms); if (a === 0) return "0ms"; if (a < 1) return `${Math.round(ms * 1000)}µs`; if (a < 10) return `${ms.toFixed(2)}ms`; if (a < 100) return `${ms.toFixed(1)}ms`; if (a < 1000) return `${Math.round(ms)}ms`; if (a < 10_000) return `${(ms / 1000).toFixed(2)}s`; if (a < 60_000) return `${(ms / 1000).toFixed(1)}s`; const minutes = Math.floor(ms / 60_000); return `${minutes}m ${Math.round((ms - minutes * 60_000) / 1000)}s`; } function formatPercent(share: number) { const pct = share * 100; if (pct > 0 && pct < 0.1) return "<0.1%"; return `${pct >= 10 ? pct.toFixed(0) : pct.toFixed(1)}%`; } const tidy = (value: number) => +value.toPrecision(12); function niceStep(span: number, count: number) { const raw = span / Math.max(1, count); const magnitude = 10 ** Math.floor(Math.log10(raw)); const r = raw / magnitude; return ( (r <= 1 ? 1 : r <= 2 ? 2 : r <= 2.5 ? 2.5 : r <= 5 ? 5 : 10) * magnitude ); } /** Tick labels carry exactly the precision of the step, so neighbors never read alike. */ function tickLabel(value: number, step: number) { if (value === 0) return "0"; if (step >= 1000 || (Math.abs(value) >= 1000 && step >= 100)) { const digits = Math.max(0, -Math.floor(Math.log10(step / 1000) + 1e-9)); return `${(value / 1000).toFixed(Math.min(3, digits))}s`; } if (step < 1 && step < 0.01) return `${tidy(value * 1000)}µs`; const digits = Math.max(0, -Math.floor(Math.log10(step) + 1e-9)); return `${value.toFixed(Math.min(3, digits))}ms`; } /* ------------------------------------------------------------------------ */ /* Model */ /* ------------------------------------------------------------------------ */ interface TraceNode { span: TraceSpan; order: number; parent: TraceNode | null; children: TraceNode[]; depth: number; end: number; self: number; descendants: number; critical: boolean; } interface TraceModel { nodes: Map; roots: TraceNode[]; /** Every node in tree order. */ ordered: TraceNode[]; start: number; end: number; duration: number; services: { name: string; count: number; errors: number }[]; errors: number; } const PALETTE = [ "var(--color-chart-1)", "var(--color-chart-2)", "var(--color-chart-3)", "var(--color-chart-4)", "var(--color-chart-5)", // Blends of the theme's own chart colors keep extra services on-palette. "color-mix(in oklab, var(--color-chart-1) 50%, var(--color-chart-2))", "color-mix(in oklab, var(--color-chart-2) 50%, var(--color-chart-3))", "color-mix(in oklab, var(--color-chart-4) 55%, var(--color-chart-5))", ]; const DESTRUCTIVE = "var(--color-destructive)"; const errorFill = `repeating-linear-gradient(-45deg, ${DESTRUCTIVE} 0 3px, color-mix(in oklab, ${DESTRUCTIVE} 58%, var(--color-card)) 3px 6px)`; function buildModel(spans: TraceSpan[]): TraceModel { const nodes = new Map(); spans.forEach((span, order) => { if (nodes.has(span.id)) return; const start = Number.isFinite(span.start) ? span.start : 0; const duration = Number.isFinite(span.duration) ? Math.max(0, span.duration) : 0; nodes.set(span.id, { span, order, parent: null, children: [], depth: 0, end: start + duration, self: duration, descendants: 0, critical: false, }); }); const roots: TraceNode[] = []; for (const node of nodes.values()) { const parentId = node.span.parentId; const parent = parentId != null && parentId !== node.span.id ? nodes.get(parentId) : undefined; if (parent) { node.parent = parent; parent.children.push(node); } else roots.push(node); } const byStart = (a: TraceNode, b: TraceNode) => a.span.start - b.span.start || a.order - b.order; const ordered: TraceNode[] = []; const visited = new Set(); const visit = (node: TraceNode, depth: number) => { visited.add(node); node.depth = depth; ordered.push(node); node.children = node.children .filter((child) => !visited.has(child)) .sort(byStart); let descendants = 0; for (const child of node.children) { visit(child, depth + 1); descendants += 1 + child.descendants; } node.descendants = descendants; // Self time: the span's duration minus the union of its children's time inside it. const start = node.span.start; const intervals = node.children .map( (child) => [ Math.max(child.span.start, start), Math.min(child.end, node.end), ] as const, ) .filter(([a, b]) => b > a) .sort((a, b) => a[0] - b[0]); let covered = 0; let cursor = -Infinity; for (const [a, b] of intervals) { if (b <= cursor) continue; covered += b - Math.max(a, cursor); cursor = b; } node.self = Math.max(0, node.end - start - covered); }; roots.sort(byStart); for (const root of roots) visit(root, 0); // Spans caught in a parent cycle are never reached from a root; draw them as roots. for (const node of nodes.values()) if (!visited.has(node)) { node.parent = null; roots.push(node); visit(node, 0); } let start = 0; let end = 0; let errors = 0; const services = new Map< string, { name: string; count: number; errors: number } >(); for (const node of ordered) { start = Math.min(start, node.span.start); end = Math.max(end, node.end); const isError = node.span.status === "error"; if (isError) errors += 1; const entry = services.get(node.span.service) ?? { name: node.span.service, count: 0, errors: 0, }; entry.count += 1; if (isError) entry.errors += 1; services.set(node.span.service, entry); } // Critical path: from the longest root, walk back from each span's end through the // child that finished last, then whatever finished before that child started. const markCritical = (node: TraceNode) => { node.critical = true; let cursor = node.end + 1e-9; const byEnd = [...node.children].sort((a, b) => b.end - a.end); for (const child of byEnd) { if (child.end <= cursor && child.end > node.span.start) { markCritical(child); cursor = child.span.start + 1e-9; } } }; const main = roots.reduce( (best, root) => !best || root.end - root.span.start > best.end - best.span.start ? root : best, null, ); if (main) markCritical(main); return { nodes, roots, ordered, start, end, duration: end - start || 1, services: [...services.values()], errors, }; } interface TraceRowModel { node: TraceNode; depth: number; /** For each ancestor column, whether a guide line continues through this row. */ lines: boolean[]; last: boolean; childCount: number; collapsed: boolean; hiddenCount: number; /** Descendants hidden by collapsing, drawn as a faint summary. */ summary: TraceNode[]; parentId: string | null; position: number; setSize: number; } function visibleChildren( children: TraceNode[], hidden: Set, ): TraceNode[] { if (!hidden.size) return children; let lifted = false; const out: TraceNode[] = []; for (const child of children) { if (hidden.has(child.span.service)) { lifted = true; out.push(...visibleChildren(child.children, hidden)); } else out.push(child); } return lifted ? out.sort((a, b) => a.span.start - b.span.start || a.order - b.order) : out; } function buildRows( model: TraceModel, collapsed: Set, hidden: Set, ) { const rows: TraceRowModel[] = []; const flat: TraceNode[] = []; const collect = (node: TraceNode, into: TraceNode[]) => { for (const child of visibleChildren(node.children, hidden)) { into.push(child); collect(child, into); } }; const visit = ( node: TraceNode, depth: number, lines: boolean[], last: boolean, parentId: string | null, position: number, setSize: number, ) => { const kids = visibleChildren(node.children, hidden); const isCollapsed = kids.length > 0 && collapsed.has(node.span.id); const summary: TraceNode[] = []; if (isCollapsed) collect(node, summary); rows.push({ node, depth, lines, last, childCount: kids.length, collapsed: isCollapsed, hiddenCount: summary.length, summary: summary.slice(0, 60), parentId, position, setSize, }); if (isCollapsed) return; const childLines = depth === 0 ? [] : [...lines, !last]; kids.forEach((kid, i) => visit( kid, depth + 1, childLines, i === kids.length - 1, node.span.id, i + 1, kids.length, ), ); }; const roots = visibleChildren(model.roots, hidden); roots.forEach((root, i) => visit(root, 0, [], i === roots.length - 1, null, i + 1, roots.length), ); // The overview ignores collapsing but follows the service filter. for (const root of roots) { flat.push(root); collect(root, flat); } return { rows, flat }; } /* ------------------------------------------------------------------------ */ /* Hooks */ /* ------------------------------------------------------------------------ */ function useReducedMotion() { return React.useSyncExternalStore( (onChange) => { const query = window.matchMedia("(prefers-reduced-motion: reduce)"); query.addEventListener("change", onChange); return () => query.removeEventListener("change", onChange); }, () => window.matchMedia("(prefers-reduced-motion: reduce)").matches, () => false, ); } function useControllable( value: T | undefined, defaultValue: T, onChange?: (value: T) => void, ) { const [inner, setInner] = React.useState(defaultValue); const controlled = value !== undefined; const current = controlled ? value : inner; const set = React.useCallback( (next: T) => { if (!controlled) setInner(next); onChange?.(next); }, [controlled, onChange], ); return [current, set] as const; } const focusRing = "outline-none focus-visible:ring-2 focus-visible:ring-ring/50"; const toolButton = cn( "inline-flex size-7 items-center justify-center rounded-md text-muted-foreground transition-colors hover:bg-muted hover:text-foreground disabled:pointer-events-none disabled:opacity-40 aria-pressed:bg-muted aria-pressed:text-foreground motion-reduce:transition-none", focusRing, ); /** Position inside the timeline column from the animated view variables. */ const at = (ms: number) => `calc((${tidy(ms)} - var(--trace-v0)) / var(--trace-vs) * 100%)`; const span = (ms: number) => `calc(${tidy(ms)} / var(--trace-vs) * 100%)`; const INDENT = 12; const PAD = 10; /* ------------------------------------------------------------------------ */ /* Row */ /* ------------------------------------------------------------------------ */ interface TraceRowProps { row: TraceRowModel; index: number; rowHeight: number; color: string; colorOf: (service: string) => string; selected: boolean; tabStop: boolean; emphasis: "critical" | "dim" | "normal"; labelSide: "after" | "before" | "inside"; /** The span lies outside the zoomed time range. */ outside: boolean; format: (ms: number) => string; onToggle: (id: string) => void; onActivate: (id: string) => void; onFocusRow: (id: string) => void; } const TraceRow = React.memo(function TraceRow({ row, index, rowHeight, color, colorOf, selected, tabStop, emphasis, labelSide, outside, format, onToggle, onActivate, onFocusRow, }: TraceRowProps) { const { node, depth } = row; const { span: s } = node; const isError = s.status === "error"; const barHeight = Math.max(6, Math.round(rowHeight * 0.43)); const elbowX = (column: number) => PAD + column * INDENT + 7; const duration = format(s.duration); return (

0 ? !row.collapsed : undefined} aria-selected={selected} aria-label={`${s.name}, ${s.service}, ${duration}${isError ? ", error" : ""}${row.collapsed ? `, ${row.hiddenCount} hidden` : ""}`} tabIndex={tabStop ? 0 : -1} onFocus={() => onFocusRow(s.id)} onClick={() => onActivate(s.id)} className={cn( "group/row absolute inset-x-0 grid cursor-default grid-cols-(--trace-cols) transition-colors duration-100 outline-none motion-reduce:transition-none", "hover:bg-muted/55 focus-visible:z-[1] focus-visible:ring-2 focus-visible:ring-ring/50 focus-visible:ring-inset", selected && "bg-primary/[0.07] shadow-[inset_2px_0_0_var(--color-primary)] hover:bg-primary/10", )} style={{ top: index * rowHeight, height: rowHeight }} >

{depth > 0 && ( {row.lines.map((continues, column) => continues ? ( ) : null, )} 0 ? 6 : 12, }} /> )} {row.childCount > 0 ? ( // Not a tab stop: the row itself takes Left and Right to collapse and expand. ) : (

{row.collapsed && row.summary.map((child) => (

); }); /* ------------------------------------------------------------------------ */ /* Attributes */ /* ------------------------------------------------------------------------ */ export interface TraceSpanAttributesProps extends React.ComponentProps<"dl"> { attributes?: Record; } /** The default attribute table of the detail panel, exported for custom detail layouts. */ export function TraceSpanAttributes({ attributes, className, ...props }: TraceSpanAttributesProps) { const entries = Object.entries(attributes ?? {}); if (!entries.length) return (

No attributes recorded.

); return (

{key}: {typeof value === "number" ? value.toLocaleString("en-US") : String(value)}

); } /* ------------------------------------------------------------------------ */ /* TraceWaterfall */ /* ------------------------------------------------------------------------ */ /** * A distributed-trace waterfall: a collapsible span tree beside a time axis. Drag across * the axis to zoom, click a span for its detail, and follow the critical path at a glance. */ export function TraceWaterfall({ spans, title, description, actions, selectedId: selectedProp, defaultSelectedId = null, onSelectedChange, highlightCriticalPath: highlightProp, defaultHighlightCriticalPath = true, onHighlightCriticalPathChange, defaultCollapsedIds, serviceColors, durationFormatter = formatDuration, renderDetail, rowHeight = 28, height = 360, treeWidth, showOverview = true, showLegend = true, onZoomChange, className, style, ...props }: TraceWaterfallProps) { const id = React.useId(); const reduced = useReducedMotion(); const model = React.useMemo(() => buildModel(spans), [spans]); const format = durationFormatter; const colors = React.useMemo(() => { const map = new Map(); model.services.forEach((service, i) => map.set( service.name, serviceColors?.[service.name] ?? PALETTE[i % PALETTE.length], ), ); return map; }, [model, serviceColors]); const colorOf = React.useCallback( (service: string) => colors.get(service) ?? PALETTE[0], [colors], ); const [selectedId, setSelectedRaw] = useControllable( selectedProp, defaultSelectedId, ); const [highlight, setHighlight] = useControllable( highlightProp, defaultHighlightCriticalPath, onHighlightCriticalPathChange, ); const [collapsed, setCollapsed] = React.useState( () => new Set(defaultCollapsedIds ?? []), ); const [hidden, setHidden] = React.useState>(() => new Set()); const [view, setViewState] = React.useState(null); const [focusId, setFocusId] = React.useState(null); const [frac, setFrac] = React.useState(null); const [width, setWidth] = React.useState(0); const [axisWidth, setAxisWidth] = React.useState(0); const [scroll, setScroll] = React.useState({ top: 0, height }); const rootRef = React.useRef(null); const scrollRef = React.useRef(null); const axisRef = React.useRef(null); const treeRef = React.useRef(null); const cursorRef = React.useRef(null); const readoutRef = React.useRef(null); const brushRef = React.useRef(null); const overviewCursorRef = React.useRef(null); const pendingFocus = React.useRef(null); const suppressClick = React.useRef(false); const selectedNode = selectedId ? (model.nodes.get(selectedId) ?? null) : null; const select = React.useCallback( (next: string | null) => { setSelectedRaw(next); onSelectedChange?.( next, next ? (model.nodes.get(next)?.span ?? null) : null, ); }, [model, onSelectedChange, setSelectedRaw], ); // A selection inside a collapsed branch opens the branch so the row can be seen. React.useEffect(() => { if (!selectedNode) return; setCollapsed((current) => { let next: Set | null = null; for (let p = selectedNode.parent; p; p = p.parent) if (current.has(p.span.id)) (next ??= new Set(current)).delete(p.span.id); return next ?? current; }); }, [selectedNode]); const { rows, flat } = React.useMemo( () => buildRows(model, collapsed, hidden), [model, collapsed, hidden], ); const indexOf = React.useMemo(() => { const map = new Map(); rows.forEach((row, i) => map.set(row.node.span.id, i)); return map; }, [rows]); /* ---------------------------------------------------------------- view */ const t0 = model.start; const total = model.duration; const target = view ?? ([t0, t0 + total] as TraceTimeRange); const v0 = target[0]; const vs = Math.max(1e-6, target[1] - target[0]); const zoomed = view != null; const displayed = React.useRef({ v0, vs }); const setView = React.useCallback( (next: TraceTimeRange | null) => { setViewState(next); onZoomChange?.(next); }, [onZoomChange], ); // Clear a zoom that no longer fits new data. React.useEffect(() => { setViewState((current) => current && (current[1] <= model.start || current[0] >= model.end) ? null : current, ); }, [model]); // Tween the view variables; React only renders the target, so zooming never re-renders per frame. React.useLayoutEffect(() => { const root = rootRef.current; if (!root) return; const apply = (a: number, s: number) => { displayed.current = { v0: a, vs: s }; root.style.setProperty("--trace-v0", String(tidy(a))); root.style.setProperty("--trace-vs", String(tidy(s))); }; const from = displayed.current; if ( reduced || (Math.abs(from.v0 - v0) < 1e-9 && Math.abs(from.vs - vs) < 1e-9) ) { apply(v0, vs); return; } apply(from.v0, from.vs); const started = performance.now(); let frame = 0; const tick = (now: number) => { const p = Math.min(1, (now - started) / 460); const e = 1 - (1 - p) ** 4; // Interpolate the span geometrically so zooming feels even at every scale. const s = from.vs * (vs / from.vs) ** e; const fromCenter = from.v0 + from.vs / 2; const toCenter = v0 + vs / 2; apply(fromCenter + (toCenter - fromCenter) * e - s / 2, s); if (p < 1) frame = requestAnimationFrame(tick); else apply(v0, vs); }; frame = requestAnimationFrame(tick); return () => cancelAnimationFrame(frame); }, [v0, vs, reduced]); const isEmpty = model.ordered.length === 0; const ticks = React.useMemo(() => { if (isEmpty) return { step: 1, list: [] }; const count = Math.max(2, Math.floor((axisWidth || 360) / 84)); const step = niceStep(vs, count); const out: { value: number; label: string }[] = []; for ( let t = Math.ceil(v0 / step - 1e-9) * step; t <= v0 + vs + step * 1e-6; t += step ) out.push({ value: tidy(t), label: tickLabel(tidy(t), step) }); return { step, list: out }; }, [v0, vs, axisWidth, isEmpty]); // After zooming, bring the first span inside the new range into view if none is showing. React.useEffect(() => { const el = scrollRef.current; if (!view || !el) return; const overlaps = (row: TraceRowModel) => row.depth > 0 && row.node.end >= view[0] && row.node.span.start <= view[1]; const top = Math.floor(el.scrollTop / rowHeight); const bottom = Math.ceil((el.scrollTop + el.clientHeight - 28) / rowHeight); if (rows.slice(top, bottom).some(overlaps)) return; const index = rows.findIndex(overlaps); if (index < 0) return; el.scrollTo({ top: Math.max(0, (index - 1) * rowHeight), behavior: reduced ? "auto" : "smooth", }); // Rows are only read when the zoom changes, not when they do. // eslint-disable-next-line react-hooks/exhaustive-deps }, [view]); /* -------------------------------------------------------------- layout */ React.useLayoutEffect(() => { const root = rootRef.current; const axis = axisRef.current; if (!root || !axis) return; const measure = () => { setWidth(root.clientWidth); setAxisWidth(axis.clientWidth); }; measure(); const observer = new ResizeObserver(measure); observer.observe(root); observer.observe(axis); return () => observer.disconnect(); }, []); const treeShare = Math.min( 0.7, Math.max(0.2, frac ?? treeWidth ?? (width && width < 560 ? 0.5 : 0.4)), ); const contentHeight = rows.length * rowHeight; // The axis row is 28px; an empty list keeps room for its message. const viewportHeight = rows.length ? Math.min(height, contentHeight + 28) : 128; const onScroll = () => { const el = scrollRef.current; if (!el) return; const top = el.scrollTop; const h = el.clientHeight; setScroll((current) => Math.floor(current.top / rowHeight) === Math.floor(top / rowHeight) && current.height === h ? current : { top, height: h }, ); }; const overscan = 8; const first = Math.max(0, Math.floor(scroll.top / rowHeight) - overscan); const last = Math.min( rows.length, Math.ceil((scroll.top + scroll.height) / rowHeight) + overscan, ); const stopId = focusId && indexOf.has(focusId) ? focusId : selectedId && indexOf.has(selectedId) ? selectedId : (rows[0]?.node.span.id ?? null); const stopIndex = stopId ? (indexOf.get(stopId) ?? -1) : -1; const scrollToIndex = React.useCallback( (index: number, center = false) => { const el = scrollRef.current; if (!el || index < 0) return; const header = 28; const top = index * rowHeight; const view = el.clientHeight - header; if (center) { if (top < el.scrollTop || top + rowHeight > el.scrollTop + view) el.scrollTop = Math.max(0, top - view / 2 + rowHeight / 2); } else if (top < el.scrollTop) el.scrollTop = top; else if (top + rowHeight > el.scrollTop + view) el.scrollTop = top + rowHeight - view; }, [rowHeight], ); // Bring an outside selection into view. const lastSelected = React.useRef(null); React.useLayoutEffect(() => { if (selectedId === lastSelected.current) return; lastSelected.current = selectedId; if (selectedId && indexOf.has(selectedId)) scrollToIndex(indexOf.get(selectedId)!, true); }, [selectedId, indexOf, scrollToIndex]); React.useLayoutEffect(() => { const target = pendingFocus.current; if (!target) return; pendingFocus.current = null; const element = treeRef.current?.querySelector( `[data-span-id="${CSS.escape(target)}"]`, ); element?.focus({ preventScroll: true }); }); /* --------------------------------------------------------- interaction */ const toggle = React.useCallback((spanId: string) => { setCollapsed((current) => { const next = new Set(current); if (next.has(spanId)) next.delete(spanId); else next.add(spanId); return next; }); }, []); const selectedRef = React.useRef(selectedId); selectedRef.current = selectedId; const activate = React.useCallback( (spanId: string) => { if (suppressClick.current) return; setFocusId(spanId); select(selectedRef.current === spanId ? null : spanId); }, [select], ); const moveFocus = (index: number) => { const row = rows[Math.max(0, Math.min(rows.length - 1, index))]; if (!row) return; pendingFocus.current = row.node.span.id; setFocusId(row.node.span.id); scrollToIndex(indexOf.get(row.node.span.id)!); }; const onTreeKeyDown = (event: React.KeyboardEvent) => { const target = event.target as HTMLElement; const spanId = target.dataset.spanId; if (!spanId || target.dataset.slot !== "trace-row") return; const index = indexOf.get(spanId) ?? 0; const row = rows[index]; const page = Math.max(1, Math.floor((scroll.height - 28) / rowHeight) - 1); switch (event.key) { case "ArrowDown": moveFocus(index + 1); break; case "ArrowUp": moveFocus(index - 1); break; case "Home": moveFocus(0); break; case "End": moveFocus(rows.length - 1); break; case "PageDown": moveFocus(index + page); break; case "PageUp": moveFocus(index - page); break; case "ArrowRight": if (row.childCount > 0 && row.collapsed) toggle(spanId); else if (row.childCount > 0) moveFocus(index + 1); break; case "ArrowLeft": if (row.childCount > 0 && !row.collapsed) toggle(spanId); else if (row.parentId && indexOf.has(row.parentId)) moveFocus(indexOf.get(row.parentId)!); break; case "Enter": case " ": select(selectedId === spanId ? null : spanId); break; case "Escape": if (selectedId) select(null); else if (zoomed) setView(null); else return; break; default: return; } event.preventDefault(); }; // Pointer: hover draws a cursor with a time readout; dragging across the axis zooms. const drag = React.useRef<{ x: number; id: number; active: boolean } | null>( null, ); const axisRect = () => axisRef.current?.getBoundingClientRect() ?? null; const timeAtX = (x: number, rect: DOMRect) => { const f = Math.min(1, Math.max(0, (x - rect.left) / (rect.width || 1))); return displayed.current.v0 + f * displayed.current.vs; }; const showCursor = (clientX: number | null) => { const rect = axisRect(); const cursor = cursorRef.current; const readout = readoutRef.current; const overview = overviewCursorRef.current; const inside = rect && clientX !== null && clientX >= rect.left && clientX <= rect.right; for (const el of [cursor, readout, overview]) if (el) el.style.opacity = inside ? "1" : "0"; if (!inside || !rect) return; const x = clientX - rect.left; const time = timeAtX(clientX, rect); if (cursor) cursor.style.transform = `translateX(${x}px)`; if (readout) { const brush = drag.current?.active ? drag.current : null; if (brush) { const a = timeAtX(brush.x, rect); const [lo, hi] = a < time ? [a, time] : [time, a]; readout.textContent = `${tickLabel(lo, vs / 50)} – ${tickLabel(hi, vs / 50)} · ${format(hi - lo)}`; } else readout.textContent = format(time - t0); const w = readout.offsetWidth; readout.style.transform = `translateX(${Math.min(Math.max(0, x - w / 2), rect.width - w)}px)`; } if (overview) overview.style.left = `${((time - t0) / total) * 100}%`; }; const onPointerDown = (event: React.PointerEvent) => { if (event.button !== 0 || event.pointerType === "touch") return; const rect = axisRect(); if (!rect || event.clientX < rect.left || event.clientX > rect.right) return; if ((event.target as HTMLElement).closest('[role="separator"]')) return; drag.current = { x: event.clientX, id: event.pointerId, active: false }; }; const onPointerMove = (event: React.PointerEvent) => { const d = drag.current; const rect = axisRect(); if (d && rect && event.pointerId === d.id) { if (!d.active && Math.abs(event.clientX - d.x) > 4) { d.active = true; event.currentTarget.setPointerCapture(event.pointerId); } if (d.active && brushRef.current) { const a = Math.min(Math.max(d.x, rect.left), rect.right) - rect.left; const b = Math.min(Math.max(event.clientX, rect.left), rect.right) - rect.left; brushRef.current.style.display = "block"; brushRef.current.style.left = `${Math.min(a, b)}px`; brushRef.current.style.width = `${Math.abs(b - a)}px`; } } showCursor(event.clientX); }; const endDrag = ( event: React.PointerEvent, commit: boolean, ) => { const d = drag.current; drag.current = null; if (brushRef.current) brushRef.current.style.display = "none"; if (!d?.active) return; const rect = axisRect(); if (commit && rect) { const a = timeAtX(d.x, rect); const b = timeAtX(event.clientX, rect); const lo = Math.max(t0, Math.min(a, b)); const hi = Math.min(t0 + total, Math.max(a, b)); if (hi - lo > Math.max(total / 5000, 1e-3)) setView([lo, hi]); } suppressClick.current = true; window.setTimeout(() => (suppressClick.current = false), 0); showCursor(event.clientX); }; const onDoubleClick = (event: React.MouseEvent) => { const rect = axisRect(); if ( zoomed && rect && event.clientX >= rect.left && event.clientX <= rect.right ) setView(null); }; // Column divider: drag or use the arrow keys. const onSeparatorPointerDown = ( event: React.PointerEvent, ) => { if (event.button !== 0) return; event.preventDefault(); const root = rootRef.current; if (!root) return; const rect = scrollRef.current?.getBoundingClientRect() ?? root.getBoundingClientRect(); const target = event.currentTarget; target.setPointerCapture(event.pointerId); const move = (e: PointerEvent) => setFrac( Math.min(0.7, Math.max(0.2, (e.clientX - rect.left) / rect.width)), ); const up = () => { target.removeEventListener("pointermove", move); target.removeEventListener("pointerup", up); target.removeEventListener("pointercancel", up); }; target.addEventListener("pointermove", move); target.addEventListener("pointerup", up); target.addEventListener("pointercancel", up); }; const collapsibleIds = React.useMemo( () => model.ordered .filter((node) => node.depth > 0 && node.children.length > 0) .map((node) => node.span.id), [model], ); const anyCollapsed = rows.some((row) => row.collapsed); /* ------------------------------------------------------------ derived */ const emphasisOf = (node: TraceNode): TraceRowProps["emphasis"] => highlight ? (node.critical ? "critical" : "dim") : "normal"; const labelSideOf = (node: TraceNode): TraceRowProps["labelSide"] => { const a = (node.span.start - v0) / vs; const b = (node.end - v0) / vs; if (b < 0.78) return "after"; if (a > 0.22) return "before"; return "inside"; }; const info = (node: TraceNode): TraceSpanInfo => ({ span: node.span, parent: node.parent?.span ?? null, children: node.children.map((child) => child.span), depth: node.depth, descendantCount: node.descendants, selfTime: node.self, share: (node.end - node.span.start) / total, critical: node.critical, color: colorOf(node.span.service), trace: { start: t0, end: t0 + total, duration: total }, }); // Keep the last span while the panel animates closed. const [shownNode, setShownNode] = React.useState( selectedNode, ); if (selectedNode && selectedNode !== shownNode) setShownNode(selectedNode); const label = typeof title === "string" ? title : "Trace spans"; const services = model.services; const renderIndices: number[] = []; for (let i = first; i < last; i++) renderIndices.push(i); if (stopIndex >= 0 && (stopIndex < first || stopIndex >= last)) renderIndices.push(stopIndex); return (

{title != null && (

{title}

)}

{isEmpty ? "—" : format(total)} {spans.length} {spans.length === 1 ? "span" : "spans"} {services.length} {services.length === 1 ? "service" : "services"} {model.errors > 0 && ( )}

{description != null && (

{description}

)}

{actions}

{showOverview && !isEmpty && ( )}

endDrag(event, true)} onPointerCancel={(event) => endDrag(event, false)} onPointerLeave={() => { if (!drag.current?.active) showCursor(null); }} onDoubleClick={onDoubleClick} >

Span Duration

{ticks.list.map((tick) => ( {/* A label that would be clipped at the right edge keeps only its line. */} {(tick.value - v0) / vs <= 0.93 ? tick.label : null} ))}

{ const delta = event.key === "ArrowLeft" ? -0.02 : event.key === "ArrowRight" ? 0.02 : 0; if (!delta) return; event.preventDefault(); setFrac(Math.min(0.7, Math.max(0.2, treeShare + delta))); }} className="group/sep absolute inset-y-0 z-10 w-2 -translate-x-1/2 cursor-col-resize outline-none" style={{ left: "var(--trace-tree)" }} >

{rows.length === 0 ? (

{spans.length ? "Every service is filtered out." : "No spans in this trace."}

) : (

{ if (!event.currentTarget.contains(event.relatedTarget as Node)) setFocusId(null); }} className="relative" style={{ height: contentHeight }} >

{ticks.list.map((tick) => ( ))}

{renderIndices.map((i) => { const row = rows[i]; const node = row.node; return ( v0 + vs) } format={format} onToggle={toggle} onActivate={activate} onFocusRow={setFocusId} /> ); })}

)}

select(null)} onSelect={select} /> {showLegend && services.length > 0 && (

{services.map((service) => { const visible = !hidden.has(service.name); const color = colorOf(service.name); return ( ); })} {hidden.size > 0 && ( )}

)}

); } /* ------------------------------------------------------------------------ */ /* Overview */ /* ------------------------------------------------------------------------ */ interface TraceOverviewProps { nodes: TraceNode[]; start: number; total: number; viewStart: number; viewEnd: number; zoomed: boolean; colorOf: (service: string) => string; highlight: boolean; cursorRef: React.RefObject; onRange: (range: TraceTimeRange | null) => void; } const TraceOverview = React.memo(function TraceOverview({ nodes, start, total, viewStart, viewEnd, zoomed, colorOf, highlight, cursorRef, onRange, }: TraceOverviewProps) { const ref = React.useRef(null); const brushRef = React.useRef(null); const drag = React.useRef<{ x: number; active: boolean } | null>(null); // A mini icicle: one band per depth, split into lanes only where siblings overlap. const lanes = React.useMemo(() => { const byDepth = new Map(); for (const node of nodes) { const list = byDepth.get(node.depth) ?? []; list.push(node); byDepth.set(node.depth, list); } const placed: { node: TraceNode; lane: number }[] = []; let offset = 0; for (const depth of [...byDepth.keys()].sort((a, b) => a - b)) { const ends: number[] = []; const list = byDepth .get(depth)! .sort((a, b) => a.span.start - b.span.start); for (const node of list) { let lane = ends.findIndex((end) => end <= node.span.start + 1e-9); if (lane < 0) lane = ends.push(0) - 1; ends[lane] = node.end; placed.push({ node, lane: offset + lane }); } offset += ends.length; } return { placed, count: offset }; }, [nodes]); const laneHeight = Math.min(7, 30 / Math.max(1, lanes.count)); const lens = (a: number) => `calc((var(--trace-v0) - ${tidy(start)}) / ${tidy(total)} * 100% + ${a}px)`; const timeAt = (clientX: number) => { const rect = ref.current!.getBoundingClientRect(); return ( start + Math.min(1, Math.max(0, (clientX - rect.left) / rect.width)) * total ); }; return (

{ if (event.button !== 0) return; drag.current = { x: event.clientX, active: false }; event.currentTarget.setPointerCapture(event.pointerId); }} onPointerMove={(event) => { const rect = event.currentTarget.getBoundingClientRect(); const cursor = cursorRef.current; if (cursor) { cursor.style.opacity = "1"; cursor.style.left = `${((event.clientX - rect.left) / rect.width) * 100}%`; } const d = drag.current; if (!d) return; if (!d.active && Math.abs(event.clientX - d.x) > 3) d.active = true; if (d.active && brushRef.current) { const a = Math.min(Math.max(d.x, rect.left), rect.right) - rect.left; const b = Math.min(Math.max(event.clientX, rect.left), rect.right) - rect.left; brushRef.current.style.display = "block"; brushRef.current.style.left = `${Math.min(a, b)}px`; brushRef.current.style.width = `${Math.abs(b - a)}px`; } }} onPointerUp={(event) => { const d = drag.current; drag.current = null; if (brushRef.current) brushRef.current.style.display = "none"; if (!d) return; if (d.active) { const a = timeAt(d.x); const b = timeAt(event.clientX); if (Math.abs(b - a) > total / 5000) onRange([Math.min(a, b), Math.max(a, b)]); } else if (zoomed) { // A click recenters the zoom window on that moment. const width = viewEnd - viewStart; const center = timeAt(event.clientX); const lo = Math.min( Math.max(start, center - width / 2), start + total - width, ); onRange([lo, lo + width]); } }} onPointerLeave={() => { if (cursorRef.current) cursorRef.current.style.opacity = "0"; }} onDoubleClick={() => onRange(null)} >

{lanes.placed.map(({ node, lane }) => { const isError = node.span.status === "error"; return ( 3 ? 1.5 : 0.5), ), background: isError ? errorFill : colorOf(node.span.service), }} /> ); })}

{zoomed && ( <>

)}

); }); /* ------------------------------------------------------------------------ */ /* Detail */ /* ------------------------------------------------------------------------ */ interface TraceDetailProps { node: TraceNode | null; info: TraceSpanInfo | null; open: boolean; format: (ms: number) => string; renderDetail?: (span: TraceSpan, info: TraceSpanInfo) => React.ReactNode; onClose: () => void; onSelect: (id: string | null) => void; } function TraceDetail({ node, info, open, format, renderDetail, onClose, onSelect, }: TraceDetailProps) { const s = node?.span; const isError = s?.status === "error"; return (

{s && info && (

{s.name}

{isError ? ( ) : ( )} {info.critical && ( )}

{s.service} {s.id} {info.parent && ( <> )}

{term}: {value}

{renderDetail ? ( renderDetail(s, info) ) : ( <>

Attributes {Object.keys(s.attributes ?? {}).length}

)}

); } ``` ### `src/registry/overtrue/deploy-pipeline.tsx` Left out to keep this page a readable size (45,534 characters). It is in the registry item above. ### `src/registry/overtrue/log-stream.tsx` ```tsx "use client"; import * as React from "react"; import { IconArrowDown as ArrowDown, IconPlayerPause as Pause, IconPlayerPlay as Play, IconSearch as Search, IconTextWrap as TextWrap, IconTrash as Trash, IconX as X, } from "@tabler/icons-react"; import { cn } from "@/lib/utils"; export type LogLevel = "debug" | "info" | "warn" | "error"; export interface LogEntry { id: string; time: Date | number | string; level: LogLevel; /** Service, job or component that emitted the line. */ source?: string; message: string; } export interface LogStreamProps extends Omit< React.ComponentProps<"div">, "children" | "title" > { /** Events, oldest first. Append new entries to the end. */ entries: LogEntry[]; title?: React.ReactNode; description?: React.ReactNode; /** Height of the scrolling log in pixels. */ height?: number; /** Render at most this many of the newest matching rows. */ maxEntries?: number; /** Follow the tail. Pass with `onFollowChange` to control it. */ follow?: boolean; defaultFollow?: boolean; onFollowChange?: (follow: boolean) => void; /** Called by the clear action. Without it, clearing hides the current entries locally. */ onClear?: () => void; /** A live source shows a Live/Paused badge, a follow control, and a cursor. Set false for archived logs. */ live?: boolean; /** Levels shown initially. */ defaultLevels?: LogLevel[]; /** Initial text filter, matched against messages and sources. */ defaultQuery?: string; /** Wrap long messages instead of truncating them. Rows can still be expanded one at a time. */ defaultWrap?: boolean; /** Format timestamps in local time or UTC. */ timeZone?: "local" | "utc"; } const LEVELS: LogLevel[] = ["debug", "info", "warn", "error"]; const levelStyle: Record = { debug: { label: "Debug", pill: "bg-muted text-muted-foreground", dot: "bg-muted-foreground/50", }, info: { label: "Info", pill: "bg-sky-500/10 text-sky-700 dark:text-sky-300", dot: "bg-sky-500", }, warn: { label: "Warn", pill: "bg-amber-500/12 text-amber-700 dark:text-amber-400", dot: "bg-amber-500", }, error: { label: "Error", pill: "bg-destructive/12 text-rose-700 dark:text-rose-400", dot: "bg-destructive", }, }; const focusRing = "outline-none focus-visible:ring-2 focus-visible:ring-ring/50 focus-visible:ring-offset-1 focus-visible:ring-offset-card"; function lastIndexOfId(entries: LogEntry[], id: string) { for (let i = entries.length - 1; i >= 0; i--) if (entries[i].id === id) return i; return -1; } const pad = (value: number, size = 2) => String(value).padStart(size, "0"); function formatTime(time: LogEntry["time"], zone: "local" | "utc") { const date = time instanceof Date ? time : new Date(time); if (Number.isNaN(date.getTime())) return ["--:--:--", ".---", undefined] as const; const utc = zone === "utc"; const hms = `${pad(utc ? date.getUTCHours() : date.getHours())}:${pad(utc ? date.getUTCMinutes() : date.getMinutes())}:${pad(utc ? date.getUTCSeconds() : date.getSeconds())}`; return [hms, `.${pad(utc ? date.getUTCMilliseconds() : date.getMilliseconds(), 3)}`, date.toISOString()] as const; } function highlight(text: string, query: string) { if (!query) return text; const lower = text.toLowerCase(); const parts: React.ReactNode[] = []; let from = 0; let at = lower.indexOf(query, from); while (at !== -1) { if (at > from) parts.push(text.slice(from, at)); parts.push( {text.slice(at, at + query.length)} , ); from = at + query.length; at = lower.indexOf(query, from); } if (from < text.length) parts.push(text.slice(from)); return parts; } interface RowProps { entry: LogEntry; query: string; wrap: boolean; expanded: boolean; enter: boolean; zone: "local" | "utc"; onToggle: (id: string) => void; } const LogRow = React.memo(function LogRow({ entry, query, wrap, expanded, enter, zone, onToggle, }: RowProps) { const [hms, ms, iso] = formatTime(entry.time, zone); const open = wrap || expanded; const level = levelStyle[entry.level] ?? levelStyle.info; return (

onToggle(entry.id)} className={cn( "relative flex items-start gap-3 px-4 py-[5px] leading-[18px]", entry.level === "error" ? "bg-destructive/[0.06] hover:bg-destructive/10 dark:bg-destructive/10 dark:hover:bg-destructive/15" : "hover:bg-muted/60", enter && "transition-[opacity,translate] duration-300 ease-out starting:translate-y-1 starting:opacity-0 motion-reduce:transition-none", )} > {entry.level === "error" && (

); }); /** A live, terminal-style event stream that follows the tail until someone scrolls up to read. */ export function LogStream({ entries, title = "Events", description, height = 320, maxEntries = 500, follow: followProp, defaultFollow = true, onFollowChange, onClear, live = true, defaultLevels = LEVELS, defaultQuery = "", defaultWrap = false, timeZone = "local", className, onKeyDown, ...props }: LogStreamProps) { const id = React.useId(); const scrollRef = React.useRef(null); const searchRef = React.useRef(null); const pausedBy = React.useRef<"scroll" | "user" | null>(null); const [followState, setFollowState] = React.useState(defaultFollow); const following = followProp ?? followState; const [frozen, setFrozen] = React.useState(null); const [levels, setLevels] = React.useState>(() => new Set(defaultLevels)); const [search, setSearch] = React.useState(defaultQuery); const [wrap, setWrap] = React.useState(defaultWrap); const [expanded, setExpanded] = React.useState>(() => new Set()); const [clearedAfter, setClearedAfter] = React.useState(null); const [mounted, setMounted] = React.useState(false); React.useEffect(() => setMounted(true), []); const setFollowing = React.useCallback( (next: boolean, reason: "scroll" | "user" = "user") => { pausedBy.current = next ? null : reason; // Freeze what is on screen so reading is never interrupted by the stream. setFrozen(next ? null : entries); if (followProp === undefined) setFollowState(next); onFollowChange?.(next); }, [entries, followProp, onFollowChange], ); // Keep a controlled `follow={false}` frozen too. React.useLayoutEffect(() => { if (!following && !frozen) setFrozen(entries); if (following && frozen) setFrozen(null); }, [following, frozen, entries]); const visibleSource = React.useMemo(() => { const source = frozen ?? entries; if (clearedAfter === null) return source; const index = lastIndexOfId(source, clearedAfter); return index === -1 ? source : source.slice(index + 1); }, [frozen, entries, clearedAfter]); const query = search.trim().toLowerCase(); const { rows, counts, matching } = React.useMemo(() => { const counts: Record = { debug: 0, info: 0, warn: 0, error: 0 }; const rows: LogEntry[] = []; for (const entry of visibleSource) { if ( query && !entry.message.toLowerCase().includes(query) && !entry.source?.toLowerCase().includes(query) ) continue; counts[entry.level] = (counts[entry.level] ?? 0) + 1; if (levels.has(entry.level)) rows.push(entry); } const matching = rows.length; return { rows: rows.length > maxEntries ? rows.slice(-maxEntries) : rows, counts, matching }; }, [visibleSource, query, levels, maxEntries]); const pending = React.useMemo(() => { if (following || !frozen) return 0; const last = frozen[frozen.length - 1]; const index = last ? lastIndexOfId(entries, last.id) : -1; let count = 0; for (let i = index + 1; i < entries.length; i++) if (levels.has(entries[i].level)) count++; return count; }, [following, frozen, entries, levels]); // Stay pinned to the newest row while following. React.useLayoutEffect(() => { const element = scrollRef.current; if (following && element) element.scrollTop = element.scrollHeight; }, [following, rows]); const handleScroll = () => { const element = scrollRef.current; if (!element) return; const distance = element.scrollHeight - element.scrollTop - element.clientHeight; if (following && distance > 24) setFollowing(false, "scroll"); else if (!following && pausedBy.current === "scroll" && distance < 2) setFollowing(true); }; const toggleRow = React.useCallback((rowId: string) => { if (window.getSelection()?.toString()) return; setExpanded((current) => { const next = new Set(current); if (!next.delete(rowId)) next.add(rowId); return next; }); }, []); const toggleLevel = (level: LogLevel) => setLevels((current) => { const next = new Set(current); if (!next.delete(level)) next.add(level); return next; }); const clear = () => { setExpanded(new Set()); if (onClear) onClear(); else setClearedAfter(entries[entries.length - 1]?.id ?? null); if (!following) setFollowing(true); }; const resetFilters = () => { setSearch(""); setLevels(new Set(LEVELS)); }; const total = visibleSource.length; const filtered = query !== "" || levels.size < LEVELS.length; return (

{ onKeyDown?.(event); const target = event.target as HTMLElement; if ( event.key === "/" && !event.defaultPrevented && !(target instanceof HTMLInputElement || target instanceof HTMLTextAreaElement) ) { event.preventDefault(); searchRef.current?.focus(); } }} {...props} >

{title}

{live && (

{description &&

{description}

}

{live && ( )}

{LEVELS.map((level) => { const active = levels.has(level); return ( ); })}

setSearch(event.target.value)} onKeyDown={(event) => { if (event.key === "Escape" && search) { event.stopPropagation(); setSearch(""); } }} placeholder="Filter…" aria-label="Filter messages" spellCheck={false} className="h-7 w-full rounded-md border border-input bg-card pr-7 pl-7 text-xs text-foreground shadow-xs transition-[border-color,box-shadow] outline-none placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-2 focus-visible:ring-ring/30 motion-reduce:transition-none" /> {search ? ( ) : ( / )}

{rows.map((entry) => ( ))} {rows.length === 0 && (

{total === 0 ? (

{live ? "Waiting for events…" : "No events yet."}

) : ( <>

No events match these filters.

)}

)} {rows.length > 0 && live && following && ( )}

{!following && ( )}

{filtered ? `${matching.toLocaleString("en-US")} of ${total.toLocaleString("en-US")}` : total.toLocaleString("en-US")}{" "} {total === 1 ? "event" : "events"} {rows.length < matching && ` · showing last ${rows.length.toLocaleString("en-US")}`} {timeZone === "utc" ? "UTC" : "Local time"}

); } ```