51:I[707087,["/_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/3j06ow7w40nxu.js","/_next/static/immutable/chunks/31nn7jwsjvqii.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"],"RegistryDependencies"] 52: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/3j06ow7w40nxu.js","/_next/static/immutable/chunks/31nn7jwsjvqii.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"] 53:T17cce,"use client"; import { DEFAULT_ECHARTS_RENDERER, buildChartCss, flattenColor, getColorsCount, resolveColors, seriesPaint, withAlpha, type ChartConfig, type EChartsRenderer, type ResolvedColors, } from "@/registry/ui/echarts-chart"; import { tooltipBaseOption, tooltipIndicatorHtml, tooltipRow, tooltipShell, type TooltipPosition, type TooltipRoundness, type TooltipVariant, } from "@/registry/ui/echarts-tooltip"; import { Brush, buildBrushDataZoom, syncBrushOverlay, type BrushGeometry, type BrushOverlayElements, type BrushProps, type BrushRange, } from "@/registry/ui/echarts-brush"; import { DataZoomComponent, GridComponent, TooltipComponent, type DataZoomComponentOption, type GridComponentOption, type TooltipComponentOption, } from "echarts/components"; import { Children, isValidElement, useCallback, useEffect, useId, useMemo, useRef, useState, type CSSProperties, type FC, type ReactNode, } from "react"; import { dotItemStyle, dotStyle, sampleGradient, type DotVariant } from "@/registry/ui/echarts-dot"; import { LegendOverlay, type LegendVariant } from "@/registry/ui/echarts-legend"; import type { ComposeOption, ImagePatternObject } from "echarts/core"; import { LineChart, type LineSeriesOption } from "echarts/charts"; import { motion, useReducedMotion } from "motion/react"; import * as echarts from "echarts/core"; // Re-export the shared types that were previously declared inline here, so // existing consumers/examples keep importing them from the chart module. export type { ChartConfig, DotVariant, EChartsRenderer, LegendVariant, TooltipPosition, TooltipRoundness, TooltipVariant, }; // Modular registration keeps the bundle lean — only the pieces this chart needs. // `DataZoomComponent` bundles both the slider (brush footer) and inside (wheel/drag) // zoom. The brush's frame/handles/labels are raw zrender elements, not the // graphic component — see syncBrushOverlay. echarts.use([LineChart, GridComponent, TooltipComponent, DataZoomComponent]); type EChartsInstance = ReturnType; // The exact option surface this chart uses — line series, grid, tooltip, and // dataZoom, plus the axis options they pull in as dependencies. Narrower than // echarts' full EChartsOption, so a misspelled key fails the compile instead of // silently reaching setOption. type EChartsOption = ComposeOption< LineSeriesOption | GridComponentOption | TooltipComponentOption | DataZoomComponentOption >; // Single-entry views of the composed option's array-or-single fields — the // modular entry points don't export the axis option types directly. type ArrayItem = T extends readonly (infer U)[] ? U : T; type XAxisOption = ArrayItem>; type YAxisOption = ArrayItem>; // ───────────────────────────────────────────────────────────────────────────── // Constants // ───────────────────────────────────────────────────────────────────────────── const STROKE_WIDTH = 0.8; // default series stroke — overrides it const LOADING_ANIMATION_DURATION = 2000; // shimmer loop, in milliseconds const REVEAL_DURATION = 1000; // intro draw-in length, in milliseconds // NOTE: the intro draw-in runs ECharts' RAW default entrance animation. Custom // easing was tried and abandoned — ECharts hardcodes the line-entrance clip to // linear and ignores animationEasing at every level (verified empirically). const LOADING_DEFAULT_POINTS = 14; // Buffer line: the last segment's stroke renders as this dash while the rest of // the area stays solid, echoing the Recharts twin's 4px dash / 3px gap forecast // tail. Ported from the line-chart twin. const BUFFER_DASH: [number, number] = [4, 3]; // ───────────────────────────────────────────────────────────────────────────── // Theme knobs — every neutral line in the chart draws from these. Base colors // come from the consumer's CSS tokens (resolved from the live DOM), so only the // opacity factors live here. Factors MULTIPLY the token's own alpha — a border // token that is already 10%-white stays subtle. Tune here, not in the builder. // ───────────────────────────────────────────────────────────────────────────── // Recharts draws its grid at border/50, but SVG dashes render pixel-crisp while // canvas at 2× DPR spreads a 1px line across device pixels — roughly halving // perceived intensity. Using the border token's full alpha lands both engines at // the same apparent brightness. const GRID_LINE_OPACITY = 1; // dashed y-axis split lines, × border alpha const AXIS_POINTER_OPACITY = 1; // tooltip cursor line, × border alpha // The skeleton is CLIPPED to a small sweeping window — only the wave section // inside it exists (stroke + fill), everything outside is fully transparent, // like a clip-path sliding across the chart. const LOADING_STROKE_OPACITY = 0.5; // outline inside the window, × foreground alpha const LOADING_SHIMMER_MAX_OPACITY = 0.03; // fill inside the window, × foreground alpha const LOADING_SHIMMER_BAND = 0.2; // window half-width, fraction of chart width const LOADING_SHIMMER_FEATHER = 0.2; // eased edge softening of the clip window const BRUSH_STROKE_OPACITY = 0.5; // mini-chart series stroke const BRUSH_FILL_OPACITY = 0.15; // mini-chart series fade, at the top stop const BRUSH_FILLER_OPACITY = 0; // selected-range wash — evil-brush draws none // ───────────────────────────────────────────────────────────────────────────── // Public types // ───────────────────────────────────────────────────────────────────────────── export type AreaVariant = | "gradient" | "gradient-reverse" | "solid" | "dotted" | "lines" | "hatched" | "none"; // stroke only — no fill at all export type StrokeVariant = "solid" | "dashed" | "animated-dashed"; export type StackType = "default" | "stacked" | "expanded"; export type AreaAnimationType = | "none" | "left-to-right" | "right-to-left" | "center-out" | "edges-in"; export type CurveType = | "linear" | "smooth" | "bump" | "monotone" | "monotoneX" | "monotoneY" | "natural" | "step"; // DotVariant, TooltipVariant, TooltipRoundness, LegendVariant, and ChartConfig // now live in the shared @/registry/ui/echarts/* modules and are imported + // re-exported at the top of this file. export interface EChartsAreaChartProps> { data: TData[]; // rows rendered by the chart config: ChartConfig; // series colors + labels renderer?: EChartsRenderer; // rendering engine — defaults to canvas xDataKey?: keyof TData & string; // x category key — falls back to the dataKey / first free column className?: string; // extra classes for the chart container curveType?: CurveType; // default curve interpolation each inherits stackType?: StackType; // how multiple areas combine animation?: boolean; // master switch for the intro draw-in — false renders instantly animationType?: AreaAnimationType; // default intro reveal (first overrides) enableHoverHighlight?: boolean; // hovering a series dims the others, like a temporary selection enableHoverReveal?: boolean; // hovering colors each area up to the pointer's x and mutes the rest defaultSelectedDataKey?: string | null; // series selected on first render selectedDataKey?: string | null; // controlled selection — overrides internal state when set onSelectionChange?: (key: string | null) => void; // fires when the selected series changes isLoading?: boolean; // shows the animated loading skeleton loadingPoints?: number; // number of points in the loading skeleton chartOptions?: Record; // escape hatch merged over the built ECharts option children?: ReactNode; // declarative config — , , , , , , … } // ───────────────────────────────────────────────────────────────────────────── // Composible parts — DECLARATIVE CONFIG. Every part renders `null`; the root // walks `children` by reference (child.type === Area, …) to collect its props. // Presence semantics mirror the Recharts twin: omit a child and that part does // not render. These are never mounted into the tree — they only carry props. // ───────────────────────────────────────────────────────────────────────────── export interface AreaProps { dataKey: string; // series key — must exist on the data + config variant?: AreaVariant; // fill style for this area only strokeVariant?: StrokeVariant; // stroke style for this area strokeWidth?: number; // stroke thickness in pixels for this area curveType?: CurveType; // curve interpolation — falls back to the root curveType animationType?: AreaAnimationType; // intro reveal — first area drives the wrapper wipe connectNulls?: boolean; // join segments across null/missing values isClickable?: boolean; // lets this area be selected by clicking it enableBufferLine?: boolean; // renders this area's last segment as a dashed, fill-less buffer children?: ReactNode; // optional and config } /** * A single area series. Declares its own fill/stroke/curve/clickability and, * optionally, resting/active point markers via composed / . * Renders nothing — the root reads these props to build the ECharts series. */ const Area: FC = () => null; export interface DotProps { variant?: DotVariant; // visual style of the point marker } /** Declares the resting point marker for the enclosing . Renders nothing. */ const Dot: FC = () => null; /** Declares the hovered/active point marker for the enclosing . Renders nothing. */ const ActiveDot: FC = () => null; export interface XAxisProps { dataKey?: string; // x category key — overrides the root xDataKey // Category-axis values are always stringified, so the formatter sees a string — // letting examples share `(value) => value.substring(0, 3)` with the Recharts twin. tickFormatter?: (value: string, index: number) => string; // formats x tick labels label?: string; // axis title, centered below the tick labels hideDots?: boolean; // hides the tick dots beside this axis's labels } /** Presence shows the x-axis category labels. Renders nothing. */ const XAxis: FC = () => null; export interface YAxisProps { dataKey?: string; // reserved for parity with the Recharts twin tickFormatter?: (value: number, index: number) => string; // formats y tick labels label?: string; // axis title, rotated alongside the tick labels hideDots?: boolean; // hides the tick dots beside this axis's labels } /** Presence shows the y value axis. Renders nothing. */ const YAxis: FC = () => null; /** Presence shows the dashed horizontal split lines. Renders nothing. */ const Grid: FC = () => null; export interface TooltipProps { variant?: TooltipVariant; // visual style of the tooltip surface roundness?: TooltipRoundness; // border-radius of the tooltip cursor?: boolean; // whether the vertical cursor line follows the pointer position?: TooltipPosition; // "variable" follows both axes (default); "fixed" pins the tooltip near the top and tracks the pointer's X } /** Presence enables the hover tooltip. Renders nothing. */ const Tooltip: FC = () => null; export interface LegendProps { variant?: LegendVariant; // visual style of the legend indicators align?: "left" | "center" | "right"; // horizontal placement verticalAlign?: "top" | "middle" | "bottom"; // vertical placement isClickable?: boolean; // lets each entry toggle selection of its series } /** Presence enables the HTML legend overlay. Renders nothing. */ const Legend: FC = () => null; // ───────────────────────────────────────────────────────────────────────────── // Children collection — walk the declarative config into plain objects the // option builder consumes. / are read from each 's own // children; a missing dot child means that marker does not render. // ───────────────────────────────────────────────────────────────────────────── type AreaSeriesConfig = { dataKey: string; variant: AreaVariant; strokeVariant: StrokeVariant; strokeWidth: number; curveType?: CurveType; animationType?: AreaAnimationType; connectNulls: boolean; isClickable: boolean; enableBufferLine: boolean; dotVariant: DotVariant; // "none" when no child is present activeDotVariant: DotVariant; // "none" when no child is present }; type XAxisSlot = { present: boolean; dataKey?: string; tickFormatter?: (value: string, index: number) => string; label?: string; hideDots: boolean; }; type YAxisSlot = { present: boolean; dataKey?: string; tickFormatter?: (value: number, index: number) => string; label?: string; hideDots: boolean; }; type TooltipSlot = { present: boolean; variant: TooltipVariant; roundness: TooltipRoundness; cursor: boolean; position: TooltipPosition; }; type LegendSlot = { present: boolean; variant: LegendVariant; align: "left" | "center" | "right"; verticalAlign: "top" | "middle" | "bottom"; isClickable: boolean; }; type BrushSlot = { present: boolean; // a child was passed — replaces the old showBrush prop height?: number; formatLabel?: (value: string, index: number) => string; onChange?: (range: { startIndex: number; endIndex: number }) => void; }; type CollectedConfig = { areas: AreaSeriesConfig[]; xAxis: XAxisSlot; yAxis: YAxisSlot; showGrid: boolean; tooltip: TooltipSlot; legend: LegendSlot; brush: BrushSlot; }; function collectConfig(children: ReactNode): CollectedConfig { const areas: AreaSeriesConfig[] = []; let xAxis: XAxisSlot = { present: false, hideDots: false }; let yAxis: YAxisSlot = { present: false, hideDots: false }; let showGrid = false; let tooltip: TooltipSlot = { present: false, variant: "default", roundness: "lg", cursor: true, position: "variable", }; let legend: LegendSlot = { present: false, variant: "rounded-square", align: "right", verticalAlign: "top", isClickable: false, }; let brush: BrushSlot = { present: false }; Children.forEach(children, (child) => { if (!isValidElement(child)) return; const type = child.type; if (type === Area) { const props = child.props as AreaProps; let dotVariant: DotVariant = "none"; let activeDotVariant: DotVariant = "none"; Children.forEach(props.children, (dotChild) => { if (!isValidElement(dotChild)) return; if (dotChild.type === Dot) { dotVariant = (dotChild.props as DotProps).variant ?? "default"; } else if (dotChild.type === ActiveDot) { activeDotVariant = (dotChild.props as DotProps).variant ?? "default"; } }); areas.push({ dataKey: props.dataKey, variant: props.variant ?? "gradient", strokeVariant: props.strokeVariant ?? "dashed", strokeWidth: props.strokeWidth ?? STROKE_WIDTH, curveType: props.curveType, animationType: props.animationType, connectNulls: props.connectNulls ?? false, isClickable: props.isClickable ?? false, enableBufferLine: props.enableBufferLine ?? false, dotVariant, activeDotVariant, }); } else if (type === XAxis) { const props = child.props as XAxisProps; xAxis = { present: true, dataKey: props.dataKey, tickFormatter: props.tickFormatter, label: props.label, hideDots: props.hideDots ?? false, }; } else if (type === YAxis) { const props = child.props as YAxisProps; yAxis = { present: true, dataKey: props.dataKey, tickFormatter: props.tickFormatter, label: props.label, hideDots: props.hideDots ?? false, }; } else if (type === Grid) { showGrid = true; } else if (type === Tooltip) { const props = child.props as TooltipProps; tooltip = { present: true, variant: props.variant ?? "default", roundness: props.roundness ?? "lg", cursor: props.cursor ?? true, position: props.position ?? "variable", }; } else if (type === Legend) { const props = child.props as LegendProps; legend = { present: true, variant: props.variant ?? "rounded-square", align: props.align ?? "right", verticalAlign: props.verticalAlign ?? "top", isClickable: props.isClickable ?? false, }; } else if (type === Brush) { const props = child.props as BrushProps; brush = { present: true, height: props.height, formatLabel: props.formatLabel, onChange: props.onChange, }; } }); return { areas, xAxis, yAxis, showGrid, tooltip, legend, brush }; } // Color plumbing (ChartConfig, getColorsCount, distributeColors, buildChartCss, // normalizeColor, withAlpha, ResolvedColors, resolveColors, seriesPaint) now // lives in @/registry/ui/echarts-chart and is imported at the top of this file. // ───────────────────────────────────────────────────────────────────────────── // Fill paints — the ECharts analogue of the Recharts fill variants (§1.1). // The first three are alpha fades; the last three are tiling canvas patterns. // ───────────────────────────────────────────────────────────────────────────── // Tiling texture fills, tinted with the series' first color. Stripes are drawn // STRAIGHT (trivially seamless) and the pattern itself is rotated — zrender // applies pattern transforms the same way ECharts decals do. Baking a diagonal // into a square tile clips the stroke at the corners, which reads as periodic // gaps once tiled. Tiles render at devicePixelRatio and scale back down so the // texture stays crisp on retina canvases. function patternFill( kind: "dotted" | "lines" | "hatched" | "stripe", color: string, ): ImagePatternObject | null { if (typeof document === "undefined") return null; const dpr = Math.max(window.devicePixelRatio || 1, 1); const canvas = document.createElement("canvas"); const ctx = canvas.getContext("2d"); if (!ctx) return null; const size = (width: number, height: number) => { canvas.width = width * dpr; canvas.height = height * dpr; ctx.scale(dpr, dpr); }; const pattern = (rotation = 0): ImagePatternObject => ({ image: canvas, repeat: "repeat", rotation, scaleX: 1 / dpr, scaleY: 1 / dpr, }); if (kind === "dotted") { size(6, 6); // Slightly larger dots at 0.7 — the vertical fade + areaStyle opacity temper // them, so at the old 0.5/r0.6 they washed out (especially on shorter areas). ctx.fillStyle = withAlpha(color, 0.7); ctx.beginPath(); ctx.arc(3, 3, 0.85, 0, Math.PI * 2); ctx.fill(); return pattern(); } if (kind === "lines" || kind === "stripe") { // Vertical 1px line every 5px, rotated 45° by the pattern transform. size(5, 5); ctx.strokeStyle = withAlpha(color, 0.3); ctx.lineWidth = 1; ctx.beginPath(); ctx.moveTo(2.5, -1); ctx.lineTo(2.5, 6); ctx.stroke(); return pattern(-Math.PI / 4); } // hatched: bold two-tone stripes leaning ~20°, echoing the Recharts // gradient-edged stripe fill. size(20, 20); ctx.fillStyle = withAlpha(color, 0.06); ctx.fillRect(0, 0, 10, 20); ctx.fillStyle = withAlpha(color, 0.22); ctx.fillRect(10, 0, 10, 20); return pattern((20 * Math.PI) / 180); } // Canvas can't express "multi-stop color horizontally × alpha fade vertically" // as one gradient, so multi-color fills composite the two on an offscreen canvas // sized to the chart: paint the horizontal color run, then mask it with a // vertical alpha ramp via destination-in. Regenerated on resize (patterns anchor // to the renderer's origin at natural pixel size). function gradientFillTexture( slots: string[], width: number, height: number, reverse: boolean, ): HTMLCanvasElement | null { if (typeof document === "undefined" || width < 1 || height < 1) return null; const canvas = document.createElement("canvas"); canvas.width = Math.ceil(width); canvas.height = Math.ceil(height); const ctx = canvas.getContext("2d"); if (!ctx) return null; const colors = ctx.createLinearGradient(0, 0, canvas.width, 0); slots.forEach((color, i) => colors.addColorStop(i / (slots.length - 1), color)); ctx.fillStyle = colors; ctx.fillRect(0, 0, canvas.width, canvas.height); const fade = ctx.createLinearGradient(0, 0, 0, canvas.height); fade.addColorStop(0, `rgba(0, 0, 0, ${reverse ? 0 : 0.1})`); fade.addColorStop(1, `rgba(0, 0, 0, ${reverse ? 0.1 : 0})`); ctx.globalCompositeOperation = "destination-in"; ctx.fillStyle = fade; ctx.fillRect(0, 0, canvas.width, canvas.height); return canvas; } // A pattern fill (dotted/lines/hatched) faded vertically — opaque at the top // (near the line), transparent toward the baseline — so it reads like the // gradient variant instead of a flat wall of pattern. The tiling pattern can't // itself carry an alpha ramp, so bake it into a plot-sized texture: tile the // pattern (reusing patternFill's tile + rotation), then mask it with a vertical // alpha ramp via destination-in. function patternFadeTexture( kind: "dotted" | "lines" | "hatched", color: string, width: number, height: number, ): HTMLCanvasElement | null { const patternObj = patternFill(kind, color); if (!patternObj || typeof document === "undefined" || width < 1 || height < 1) return null; const tile = patternObj.image; if (!(tile instanceof HTMLCanvasElement)) return null; const rotation = patternObj.rotation ?? 0; const tileScale = patternObj.scaleX ?? 1; // patternFill draws the tile at dpr; 1/dpr scales it back const w = Math.ceil(width); const h = Math.ceil(height); const canvas = document.createElement("canvas"); canvas.width = w; canvas.height = h; const ctx = canvas.getContext("2d"); if (!ctx) return null; const pat = ctx.createPattern(tile, "repeat"); if (!pat) return null; // Replicate the ECharts ImagePattern transform (rotate the tiling, scale the // dpr tile back to CSS size) so the baked texture matches the plain pattern. if (typeof pat.setTransform === "function") { const m = new DOMMatrix(); m.rotateSelf((rotation * 180) / Math.PI); m.scaleSelf(tileScale, tileScale); pat.setTransform(m); } ctx.fillStyle = pat; ctx.fillRect(0, 0, w, h); const fade = ctx.createLinearGradient(0, 0, 0, h); fade.addColorStop(0, "rgba(0, 0, 0, 1)"); // top: keep the pattern fade.addColorStop(1, "rgba(0, 0, 0, 0)"); // baseline: fade it out ctx.globalCompositeOperation = "destination-in"; ctx.fillStyle = fade; ctx.fillRect(0, 0, w, h); return canvas; } // Resolves the area fill for a variant into an ECharts color value. `size` is the // full renderer size, used to bake 2D gradients for multi-color series. function fillPaint( variant: AreaVariant, showUnselected: boolean, slots: string[], size: { width: number; height: number }, ): string | echarts.graphic.LinearGradient | ImagePatternObject { const base = slots[0] ?? "rgba(120, 120, 120, 1)"; const multi = slots.length > 1; // "none" — stroke only, no fill (even when unselected). if (variant === "none") return "transparent"; // A non-selected area in a clickable chart recedes as a 45° stripe texture. if (showUnselected) { return patternFill("stripe", base) ?? withAlpha(base, 0.1); } switch (variant) { case "gradient": case "gradient-reverse": { const reverse = variant === "gradient-reverse"; if (multi) { const texture = gradientFillTexture(slots, size.width, size.height, reverse); if (texture) return { image: texture, repeat: "no-repeat" }; } return new echarts.graphic.LinearGradient(0, 0, 0, 1, [ { offset: 0, color: withAlpha(base, reverse ? 0 : 0.1) }, { offset: 1, color: withAlpha(base, reverse ? 0.1 : 0) }, ]); } case "solid": { // Uniform alpha, so the horizontal color run survives as one gradient. if (multi) { return new echarts.graphic.LinearGradient( 0, 0, 1, 0, slots.map((color, i) => ({ offset: i / (slots.length - 1), color: withAlpha(color, 0.1), })), ); } return withAlpha(base, 0.1); } case "dotted": case "lines": case "hatched": { // Faded by default (opaque near the line, transparent at the baseline). const texture = patternFadeTexture(variant, base, size.width, size.height); if (texture) return { image: texture, repeat: "no-repeat" }; return patternFill(variant, base) ?? withAlpha(base, 0.1); } default: return withAlpha(base, 0.1); } } // ───────────────────────────────────────────────────────────────────────────── // Curve mapping — linear → straight, step → step:"end", everything else → smooth. // ───────────────────────────────────────────────────────────────────────────── function curveConfig(curveType: CurveType): { smooth: boolean; step: "middle" | false } { // Recharts "step" is d3's curveStep: the transition happens at the MIDPOINT // between points, so each dot sits centered on its plateau. if (curveType === "step") return { smooth: false, step: "middle" }; if (curveType === "linear") return { smooth: false, step: false }; return { smooth: true, step: false }; } // ───────────────────────────────────────────────────────────────────────────── // Selection opacities (§4.3) — dims a series only when another one is selected. // ───────────────────────────────────────────────────────────────────────────── function getOpacity(selected: string | null, key: string) { if (selected === null || selected === key) return { fill: 0.8, stroke: 1, dot: 1 }; return { fill: 0.1, stroke: 0.3, dot: 0.3 }; } // ───────────────────────────────────────────────────────────────────────────── // Loading skeleton helpers // ───────────────────────────────────────────────────────────────────────────── // Skeleton data as a smooth random walk in a comfortable band — reads like a // resting chart instead of raw noise spikes. function getLoadingData(points: number): number[] { const rows: number[] = []; let value = 30 + Math.random() * 20; for (let i = 0; i < points; i++) { value = Math.min(58, Math.max(16, value + (Math.random() - 0.5) * 16)); rows.push(Math.round(value)); } return rows; } // Gradient stops forming a hard clip window around `center`: full `peak` alpha // inside, zero outside, with a small feather so the edge isn't aliased. // `center` may run outside [0, 1] so the window fully enters and exits the frame. function shimmerWindowStops(center: number, color: string, peak: number) { const half = LOADING_SHIMMER_BAND; const feather = LOADING_SHIMMER_FEATHER; const alphaAt = (x: number) => { const dist = Math.abs(x - center); if (dist <= half - feather) return peak; if (dist >= half) return 0; // Sine-eased falloff — a linear ramp still reads as a hard cut. return peak * Math.sin(((1 - (dist - (half - feather)) / feather) * Math.PI) / 2); }; const offsets = [ 0, center - half, center - half + feather, center, center + half - feather, center + half, 1, ] .filter((x) => x >= 0 && x <= 1) .sort((a, b) => a - b); const stops: { offset: number; color: string }[] = []; for (const offset of offsets) { if (stops.length === 0 || offset - stops[stops.length - 1].offset > 1e-4) { stops.push({ offset, color: withAlpha(color, alphaAt(offset)) }); } } return stops; } // The `__buffer-` prefix marks the dashed forecast overlay of a buffer area; it // carries the SAME key's value, so the tooltip recovers the key from it (see // createTooltipFormatter). Every other `__`-prefixed series (mini chart, loading // skeleton, hover-reveal base) is truly internal and never surfaces. const BUFFER_PREFIX = "__buffer-"; // The fill-only patch under a buffer area's dashed tail (the main area's fill // stops one point early). Internal, so the tooltip drops it. const BUFFERFILL_PREFIX = "__bufferfill-"; // The `__reveal-` prefix marks the muted base layer of a hover-reveal area — see // buildAreaSeries. Internal, so the tooltip drops it like the mini/loading rows. const REVEAL_PREFIX = "__reveal-"; // ───────────────────────────────────────────────────────────────────────────── // Option builders — pure functions from a snapshot context to ECharts option // fragments. The component reads its refs and renderer size ONCE per build into // this context; nothing below touches React state or the chart instance, so // each fragment can be reasoned about (and tested) in isolation. // ───────────────────────────────────────────────────────────────────────────── type OptionBuildContext = { data: Record[]; config: ChartConfig; areas: AreaSeriesConfig[]; seriesKeys: string[]; curveType: CurveType; isStacked: boolean; isExpanded: boolean; selectedDataKey: string | null; hasSelection: boolean; showGrid: boolean; xAxisSlot: XAxisSlot; yAxisSlot: YAxisSlot; tooltipSlot: TooltipSlot; legendSlot: LegendSlot; isLoading: boolean; loadingData: () => number[]; showBrush: boolean; brushHeight: number; enableHoverHighlight: boolean; enableHoverReveal: boolean; // hover colors each area up to the pointer, mutes the rest revealIndex: number | null; // pointer's x-index while revealing (null = idle → chart looks normal) revealSink: Record; // buildAreaSeries writes each area's full per-datum points here for the hover handler resolved: ResolvedColors; rendererSize: { width: number; height: number }; // 2D gradient textures bake at renderer size categories: string[]; brushRange: BrushRange; // zoom window carried through rebuilds getHoveredKey: () => string | null; // read per tooltip render — hover never repushes the option }; // Grid insets plus the footer band reserved for the brush. ECharts 6 contains // axis labels automatically (the legacy `containLabel` flag now only triggers a // deprecation warning). function buildChartLayout({ legendSlot, xAxisSlot, showBrush, brushHeight }: OptionBuildContext): { grid: GridComponentOption; brushBottom: number; } { const legendTop = legendSlot.present && legendSlot.verticalAlign === "top"; const legendBottom = legendSlot.present && legendSlot.verticalAlign === "bottom"; // Clearance covers the x-axis labels plus the same breathing room the // Recharts twin leaves between them and the brush. An x-axis TITLE renders // below the labels (nameGap), so it needs its own band above the brush frame. const brushGap = showBrush ? brushHeight + 30 + (xAxisSlot.label ? 22 : 0) : 0; return { grid: { left: 8, right: 8, top: legendTop ? 42 : 16, bottom: 8 + brushGap + (legendBottom ? 34 : 0), }, brushBottom: legendBottom ? 34 : 6, }; } function buildMainAxes(ctx: OptionBuildContext): { xAxis: XAxisOption; yAxis: YAxisOption } { const { xAxisSlot, yAxisSlot, showGrid, isLoading, isExpanded, categories, loadingData } = ctx; const { tokens } = ctx.resolved; const axisLabelColor = tokens.mutedForeground; const splitLineColor = withAlpha(tokens.border, GRID_LINE_OPACITY); // Gridline gray as an opaque color — see flattenColor. const tickDotColor = flattenColor(splitLineColor, tokens.background); const xTickFormatter = xAxisSlot.tickFormatter; const yTickFormatter = yAxisSlot.tickFormatter; const xAxis: XAxisOption = { type: "category", boundaryGap: false, show: true, data: isLoading ? loadingData().map((_, i) => i) : categories, // Axis title — same size/color as the tick labels, pushed clear of them. name: isLoading ? undefined : xAxisSlot.label, nameLocation: "middle", nameGap: 30, nameTextStyle: { color: axisLabelColor, fontSize: 10 }, axisLine: { show: false }, // Tick DOTS: a near-zero-length tick whose round caps form a true circle, // in the gridline gray (flattened opaque so the caps don't stack). axisTick: { show: !isLoading && xAxisSlot.present && !xAxisSlot.hideDots, // Ticks default to the BOUNDARY between categories, which on a boundaryGap // axis drops the dot in the gap instead of under its label. A no-op here // (boundaryGap is false), kept for parity with the bar/composed charts. alignWithLabel: true, length: 0.5, lineStyle: { color: tickDotColor, width: 3, cap: "round" }, }, splitLine: { show: false }, axisLabel: { show: !isLoading && xAxisSlot.present, color: axisLabelColor, fontSize: 10, margin: 8, formatter: xTickFormatter ? (value: string, index: number) => xTickFormatter(value, index) : undefined, }, }; // An ECharts axis with `show: false` hides its splitLines too, but Recharts' // draws with or without a visible . Keep the axis on // whenever is present and gate the LABELS on instead. const yAxis: YAxisOption = { type: "value", show: yAxisSlot.present || showGrid, max: isExpanded ? 1 : undefined, // Axis title — rendered rotated alongside the tick labels, same styling. name: isLoading ? undefined : yAxisSlot.label, nameLocation: "middle", nameGap: 38, nameTextStyle: { color: axisLabelColor, fontSize: 10 }, axisLine: { show: false }, // Same tick dots as the x-axis, beside each value label. No alignWithLabel // here: ECharts types it on the CATEGORY axis only, and a value axis already // puts its ticks on the labels. axisTick: { show: yAxisSlot.present && !isLoading && !yAxisSlot.hideDots, length: 0.5, lineStyle: { color: tickDotColor, width: 3, cap: "round" }, }, splitLine: { // Hidden while loading — the skeleton floats on a clean canvas. show: showGrid && !isLoading, lineStyle: { color: splitLineColor, type: [3, 3] as [number, number], width: 1 }, }, axisLabel: { // Hidden while loading — skeleton values are meaningless, and the // Recharts YAxis unmounts during loading too. show: yAxisSlot.present && !isLoading, color: axisLabelColor, fontSize: 10, margin: 8, formatter: isExpanded ? (value: number) => `${Math.round(value * 100)}%` : yTickFormatter ? (value: number, index: number) => yTickFormatter(value, index) : undefined, }, }; return { xAxis, yAxis }; } // Tooltip HTML builder, closed over the build context. `getHoveredKey` is read // per invocation — ECharts calls the formatter at hover time, and syncing hover // through an option push instead would reset the native blur state mid-hover. function createTooltipFormatter(ctx: OptionBuildContext) { const { config, selectedDataKey, tooltipSlot, getHoveredKey } = ctx; return (params: unknown): string => { const rows = Array.isArray(params) ? params : [params]; if (!rows.length) return ""; const first = rows[0] as { axisValue?: string | number; name?: string }; // Label shows the RAW axis value — matches ChartTooltipContent (no tick formatter). const axisValue = first.axisValue ?? first.name ?? ""; const label = String(axisValue); // Dedupe by effective key: a buffer area contributes both its solid part // (id=key) and its dashed overlay (id=`__buffer-{key}`) at the shared // second-to-last point. Keep the first non-null value seen per key so the // final point (only the overlay has data there) still shows its number. const seen = new Set(); const body = rows .map((param) => { const p = param as { seriesId?: string; seriesName?: string; value?: number | string | null; }; const rawId = String(p.seriesId ?? ""); // Map the dashed buffer overlay back onto its series; drop every other // internal series (mini chart, loading skeleton, hover-reveal base). const key = rawId.startsWith(BUFFER_PREFIX) ? rawId.slice(BUFFER_PREFIX.length) : rawId.startsWith("__") ? "" : (p.seriesId ?? p.seriesName ?? ""); if (!key) return ""; // A null value means this series does not reach the hovered x (a buffer // area's solid part stops before the last point, a revealed series stops // at the cursor) — skip it, letting another row for the key stand in. if (p.value === null || p.value === undefined) return ""; if (seen.has(key)) return ""; seen.add(key); const item = config[key]; const colorsCount = item ? getColorsCount(item) : 1; const labelText = typeof item?.label === "string" ? item.label : (p.seriesName ?? key); const hovered = getHoveredKey(); const dimmed = (selectedDataKey != null && selectedDataKey !== key) || (hovered != null && hovered !== key) ? " opacity-30" : ""; const value = typeof p.value === "number" ? p.value.toLocaleString() : String(p.value ?? ""); return tooltipRow({ indicatorHtml: tooltipIndicatorHtml(key, colorsCount), labelText, valueText: value, dimmed, }); }) .join(""); return tooltipShell({ label, body, roundness: tooltipSlot.roundness, variant: tooltipSlot.variant, }); }; } function buildTooltipOption(ctx: OptionBuildContext): TooltipComponentOption { const { tooltipSlot, isLoading } = ctx; const { tokens } = ctx.resolved; return { ...tooltipBaseOption({ present: tooltipSlot.present && !isLoading, cursor: tooltipSlot.cursor, tokens, position: tooltipSlot.position, axisPointerColor: withAlpha(tokens.border, AXIS_POINTER_OPACITY), strokeWidth: STROKE_WIDTH, }), formatter: createTooltipFormatter(ctx), }; } // ── Brush — the evil-brush look, canvas-style: a real mini chart of the full // data in a second grid, with a transparent slider dataZoom laid over it. Both // zoom entries target only the MAIN x-axis, so the mini chart never filters // itself. Only called when `showBrush` is set. function buildBrushOption( ctx: OptionBuildContext, brushBottom: number, ): { miniGrid: GridComponentOption; miniXAxis: XAxisOption; miniYAxis: YAxisOption; miniSeries: LineSeriesOption[]; dataZoom: DataZoomComponentOption[]; } { const { data, areas, curveType, isStacked, selectedDataKey, brushHeight, categories } = ctx; const { tokens } = ctx.resolved; const miniGrid: GridComponentOption = { left: 8, right: 8, bottom: brushBottom, height: brushHeight, // No visible axes here — opt out of label containment so the mini chart // spans the full brush frame. outerBoundsMode: "none", }; const miniXAxis: XAxisOption = { type: "category", gridIndex: 1, boundaryGap: false, show: false, data: categories, axisPointer: { show: false }, }; const miniYAxis: YAxisOption = { type: "value", gridIndex: 1, show: false }; const miniSeries: LineSeriesOption[] = areas.map((area) => { const key = area.dataKey; const base = (ctx.resolved.series[key] ?? [])[0] ?? "rgba(120, 120, 120, 1)"; const curve = curveConfig(area.curveType ?? curveType); // The mini chart mirrors the click selection: unselected series recede // by the same ratios as the main plot. // Dim ratios normalize against the base opacities (stroke 1, fill 0.8). const opacity = getOpacity(selectedDataKey, key); const strokeDim = opacity.stroke; const fillDim = opacity.fill / 0.8; return { id: `__mini-${key}`, type: "line", xAxisIndex: 1, yAxisIndex: 1, data: data.map((row) => Number(row[key]) || 0), stack: isStacked ? "__mini-total" : undefined, smooth: curve.smooth, step: curve.step, connectNulls: area.connectNulls, silent: true, showSymbol: false, emphasis: { disabled: true }, tooltip: { show: false }, lineStyle: { color: base, width: 1, opacity: BRUSH_STROKE_OPACITY * strokeDim }, areaStyle: { color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [ { offset: 0, color: withAlpha(base, BRUSH_FILL_OPACITY * fillDim) }, { offset: 1, color: withAlpha(base, 0) }, ]), }, z: 0, }; }); const dataZoom = buildBrushDataZoom({ brushBottom, brushHeight, brushRange: ctx.brushRange, fillerColor: withAlpha(tokens.foreground, BRUSH_FILLER_OPACITY), }); return { miniGrid, miniXAxis, miniYAxis, miniSeries, dataZoom }; } // Loading skeleton — ONE gray wave regardless of declared areas (Recharts // parity: its skeleton is a single LoadingArea), swept by the shimmer rAF. function buildLoadingOption( ctx: OptionBuildContext, frame: { grid: GridComponentOption; xAxis: XAxisOption; yAxis: YAxisOption }, ): EChartsOption { const { tokens } = ctx.resolved; const curve = curveConfig(ctx.curveType); return { animation: false, grid: frame.grid, xAxis: frame.xAxis, yAxis: frame.yAxis, tooltip: { show: false }, series: [ { id: "__loading", type: "line", data: ctx.loadingData(), smooth: curve.smooth, step: curve.step, showSymbol: false, silent: true, // Invisible until the first shimmer tick positions the clip window. lineStyle: { color: withAlpha(tokens.foreground, 0), width: 1 }, areaStyle: { color: withAlpha(tokens.foreground, 0) }, z: 1, }, ], }; } function buildAreaSeries(ctx: OptionBuildContext): LineSeriesOption[] { const { data, config, areas, seriesKeys, curveType, isStacked, isExpanded, selectedDataKey, hasSelection, enableHoverHighlight, enableHoverReveal, revealIndex, revealSink, resolved, rendererSize, } = ctx; // Optional per-row normalization for the expanded (100%) stack. const rowTotals = isExpanded ? data.map((row) => seriesKeys.reduce((sum, key) => sum + (Number(row[key]) || 0), 0)) : []; return areas.flatMap((area): LineSeriesOption[] => { const key = area.dataKey; const slots = resolved.series[key] ?? ["rgba(120, 120, 120, 1)"]; const paint = seriesPaint(slots); const isSelected = selectedDataKey === key; const showUnselected = hasSelection && !isSelected; const opacity = getOpacity(selectedDataKey, key); const curve = curveConfig(area.curveType ?? curveType); const values = data.map((row, i) => { const value = Number(row[key]) || 0; if (!isExpanded) return value; const total = rowTotals[i]; return total ? value / total : 0; }); const n = values.length; // Hover-reveal is a root-level mode and owns the whole area rendering, so it // takes precedence over a per-area buffer tail when both are set. const reveal = enableHoverReveal; const buffer = !reveal && area.enableBufferLine && n >= 2; const revealActive = reveal && revealIndex !== null; const restingDot = dotStyle(area.dotVariant, paint, resolved.tokens.background); const activeDot = dotStyle(area.activeDotVariant, paint, resolved.tokens.background); const restingVisible = area.dotVariant !== "none"; const dotOpacity = opacity.dot; const multiColor = slots.length > 1; // The reveal truncates the line to the cursor, which would COMPRESS a // bbox-relative stroke gradient into the shorter span — misaligning it from // the plot-anchored fill texture and the index-sampled dots. Anchor the // stroke to the plot in absolute pixels so every x keeps its own color. const strokePaint = reveal && multiColor ? new echarts.graphic.LinearGradient( 8, 0, Math.max(rendererSize.width - 8, 9), 0, slots.map((color, i) => ({ offset: i / (slots.length - 1), color })), true, ) : paint; // Turn a value list into ECharts data — attaching per-datum symbol colors // for multi-color areas (like the Recharts dots; the line/fill keep the full // gradient), and passing `null` gaps through so a buffer area's two parts // each draw only their own segment. type AreaPoint = | number | null | { value: number; itemStyle: Record; emphasis: { itemStyle: Record }; }; const toPoints = (vals: (number | null)[]): AreaPoint[] => !multiColor ? vals : vals.map((value, i): AreaPoint => { if (value === null) return null; const t = vals.length > 1 ? i / (vals.length - 1) : 0; const pointColor = sampleGradient(slots, t); return { value, itemStyle: { ...dotItemStyle( restingVisible ? area.dotVariant : area.activeDotVariant, pointColor, resolved.tokens.background, ), opacity: dotOpacity, }, emphasis: { itemStyle: { ...dotItemStyle( area.activeDotVariant === "none" ? "default" : area.activeDotVariant, pointColor, resolved.tokens.background, ), opacity: 1, }, }, }; }); // Buffer area: the solid MAIN part drops the last point (its final segment — // both fill and stroke — becomes the dashed, fill-less overlay); the overlay // carries only the last two points. Reveal instead TRUNCATES the real series // at the cursor's x-index (points beyond it null'd), so its line + fill stop // there and the muted base layer shows through past it. When idle // (revealIndex null) the real series carries its full data — the chart looks // completely normal. // Snapshot the FULL per-datum points (with the multi-color dot itemStyle) so // the reveal hover handler can slice them without losing each dot's sampled // gradient color — plain values would fall back to the default palette. if (reveal) revealSink[key] = toPoints(values); const mainValues: (number | null)[] = buffer ? values.map((v, i) => (i === n - 1 ? null : v)) : revealActive ? sliceToNull(values, revealIndex as number) : values; // A buffer area keeps its body solid and dashes only the tail overlay, so // the main stroke is always solid regardless of strokeVariant (matches the // Recharts twin, which suppresses the base dasharray while buffering). const mainDash: "solid" | [number, number] = buffer || area.strokeVariant === "solid" ? "solid" : ([3, 3] as [number, number]); const z = isSelected ? 3 : hasSelection ? 1 : 2; const mainSeries: LineSeriesOption = { id: key, name: typeof config[key]?.label === "string" ? config[key]?.label : key, type: "line", data: toPoints(mainValues), stack: isStacked ? "total" : undefined, smooth: curve.smooth, step: curve.step, connectNulls: area.connectNulls, cursor: area.isClickable ? "pointer" : "default", // By default ECharts only fires mouse events on the symbols — this makes // the line AND the filled area clickable, like the Recharts . // (`true` covers both; the deprecated `triggerLineEvent` did the same.) triggerEvent: area.isClickable, showSymbol: restingVisible, symbol: "circle", symbolSize: restingVisible ? restingDot.size : activeDot.size, z, lineStyle: { color: strokePaint, width: area.strokeWidth, opacity: opacity.stroke, type: mainDash, dashOffset: 0, }, itemStyle: multiColor ? { opacity: dotOpacity } : { ...(restingVisible ? restingDot.itemStyle : activeDot.itemStyle), opacity: dotOpacity, }, areaStyle: { color: fillPaint(area.variant, showUnselected, slots, rendererSize), opacity: opacity.fill, }, emphasis: { // focus "series" blurs every other series in this grid while one is // hovered — the hover twin of the click selection. Suppressed entirely // while a series is click-selected: the selection dim owns the canvas, // so hover highlighting stops until the selection clears (the option // rebuilds on selection change, making this a build-time conditional). // Reveal owns the hover visual, so native focus-blur stands down when it // is on (they must not blend). focus: enableHoverHighlight && !enableHoverReveal && !hasSelection ? "series" : "none", scale: restingVisible ? activeDot.size / Math.max(restingDot.size, 1) : 1, ...(multiColor ? {} : { itemStyle: { ...activeDot.itemStyle, opacity: 1 } }), }, // Blur styling mirrors the click-selection dim (fill 0.1 / stroke 0.3 / dot 0.3). blur: { lineStyle: { opacity: 0.3 }, areaStyle: { opacity: 0.1 }, itemStyle: { opacity: 0.3 }, }, }; // Hover-reveal: a muted gray BASE layer of the FULL series sits one z below // the real one. It is invisible while idle (opacity 0 → the chart looks // normal) and fades in only while hovering, so the region PAST the cursor — // where the truncated real series has stopped — shows as neutral gray. if (reveal) { const muted = resolved.tokens.mutedForeground; const revealBase: LineSeriesOption = { id: `${REVEAL_PREFIX}${key}`, type: "line", // Only the region FROM the cursor onward (null before it), so the gray // never sits under the colored part — the two meet exactly at the // pointer and their colors can't mix. data: revealActive ? sliceFrom(values, revealIndex as number) : values, // Its OWN stack, not "total" — a second series in the real stack would // double every key's contribution (broken geometry). This mirror stack // reproduces the same cumulative shape in a separate layer. stack: isStacked ? "__reveal-total" : undefined, smooth: curve.smooth, step: curve.step, connectNulls: false, silent: true, showSymbol: false, symbol: "circle", z: z - 1, // Neutral gray, NO fill, SAME dash pattern as the colored line. lineStyle: { color: muted, width: area.strokeWidth, type: mainDash, opacity: revealActive ? 0.3 : 0, }, emphasis: { disabled: true }, blur: { lineStyle: { opacity: revealActive ? 0.3 : 0 } }, tooltip: { show: false }, }; return [revealBase, mainSeries]; } if (!buffer) return [mainSeries]; // Dashed forecast overlay — draws ONLY the last segment's stroke, with NO // fill (matching the line twin's fill-less buffer). Silent, so it never // intercepts clicks/hover; it still feeds the axis tooltip (silent series // are aggregated by axis), which is why the last point keeps its number. const bufferValues: (number | null)[] = values.map((v, i) => (i >= n - 2 ? v : null)); const bufferSeries: LineSeriesOption = { id: `${BUFFER_PREFIX}${key}`, type: "line", data: toPoints(bufferValues), // Own mirror stack — a second series in "total" would double the last // points' stacked height (buffer drawn too high). Same values in the same // order give the identical cumulative height, so the dash lines up. stack: isStacked ? "__buffer-total" : undefined, smooth: curve.smooth, step: curve.step, connectNulls: true, silent: true, showSymbol: restingVisible, symbol: "circle", symbolSize: restingVisible ? restingDot.size : activeDot.size, z, lineStyle: { color: paint, width: area.strokeWidth, opacity: opacity.stroke, type: BUFFER_DASH, }, itemStyle: multiColor ? { opacity: dotOpacity } : { ...(restingVisible ? restingDot.itemStyle : activeDot.itemStyle), opacity: dotOpacity, }, // The dashed tail is a separate silent series, so focus:"series" on its // parent would blur it apart from the area it belongs to. The root // dispatch-links this id (companionIdsByKey) so it focuses WITH its parent; // these styles give it the parent's look while focused and the // click-selection dim while another series is hovered. emphasis: { focus: "none", scale: false, lineStyle: { opacity: opacity.stroke }, itemStyle: { opacity: dotOpacity }, }, blur: { lineStyle: { opacity: 0.3 }, itemStyle: { opacity: 0.3 } }, }; // Fill patch — the main area drops its last point (so the tail stroke can be // the dashed overlay), which also removes the FILL under that last segment. // This fill-only layer (no stroke, no dots) fills just that segment so the // area reads as full under the dashed tail. Its OWN mirror stack keeps the // stacked geometry right — a second series in "total" would double the last // points' cumulative height (same reason as the reveal base + mini chart). const bufferFillSeries: LineSeriesOption = { id: `${BUFFERFILL_PREFIX}${key}`, type: "line", data: toPoints(bufferValues), stack: isStacked ? "__bufferfill-total" : undefined, smooth: curve.smooth, step: curve.step, connectNulls: true, silent: true, showSymbol: false, z: z - 1, lineStyle: { opacity: 0 }, areaStyle: { color: fillPaint(area.variant, showUnselected, slots, rendererSize), opacity: opacity.fill, }, emphasis: { disabled: true }, blur: { areaStyle: { opacity: 0.1 } }, tooltip: { show: false }, }; return [mainSeries, bufferSeries, bufferFillSeries]; }); } // Copy a value list with everything AFTER `idx` nulled — the hover-reveal cut: // the colored real series keeps its data up to the cursor and drops the rest, so // (with connectNulls false) its line and fill stop dead at the pointer. function sliceToNull(vals: readonly T[], idx: number): (T | null)[] { return vals.map((v, i) => (i > idx ? null : v)); } // Copy a value list with everything BEFORE `idx` nulled — the reveal's gray tail. // The muted base keeps only the region from the cursor onward, so it never sits // under the colored part; both include `idx` so they meet at the pointer. // Generic so it preserves per-datum point objects (multi-color dot itemStyle). function sliceFrom(vals: readonly T[], idx: number): (T | null)[] { return vals.map((v, i) => (i < idx ? null : v)); } // Per-series PLOTTED top value per category index — expanded normalization and // stack accumulation applied — so pointer hit-testing can reason in data space. function computePlottedTops(ctx: OptionBuildContext): Record { const { data, areas, seriesKeys, isStacked, isExpanded } = ctx; const rowTotals = isExpanded ? data.map((row) => seriesKeys.reduce((sum, key) => sum + (Number(row[key]) || 0), 0)) : []; const running = new Array(data.length).fill(0); const tops: Record = {}; for (const area of areas) { const key = area.dataKey; tops[key] = data.map((row, i) => { let value = Number(row[key]) || 0; if (isExpanded) value = rowTotals[i] ? value / rowTotals[i] : 0; return isStacked ? (running[i] += value) : value; }); } return tops; } // Overlapping area polygons all contain the same pixel, so ECharts' native hit // test lands on whichever series drew topmost — not the band the user SEES. // Resolve the intended series geometrically: a plotted line within grab // distance of the pointer wins outright; otherwise the point belongs to the // nearest line ABOVE it (the boundary of the band the pointer is inside). // Returns null when the pointer is outside the grid or above every line. function resolveAreaAtPixel( chart: EChartsInstance, tops: Record, keys: string[], x: number, y: number, ): string | null { if (keys.length < 2) return null; if (!chart.containPixel({ gridIndex: 0 }, [x, y])) return null; const [rawIndex] = chart.convertFromPixel({ gridIndex: 0 }, [x, y]); const index = Math.round(rawIndex); let nearest: string | null = null; let nearestDist = Infinity; let above: string | null = null; let abovePixelY = -Infinity; for (const key of keys) { const value = tops[key]?.[index]; if (value === undefined) continue; const pixelY = chart.convertToPixel({ gridIndex: 0 }, [index, value])[1]; const dist = Math.abs(pixelY - y); if (dist < nearestDist) { nearestDist = dist; nearest = key; } // Pixel y grows downward: a line above the pointer has the larger pixelY // among those ≤ the pointer's. if (pixelY <= y && pixelY > abovePixelY) { abovePixelY = pixelY; above = key; } } return nearestDist <= 10 ? nearest : above; } // ───────────────────────────────────────────────────────────────────────────── // Live imperative state — everything the ECharts event handlers, rAF loops, and // theme/resize repushes read or write OUTSIDE the React render cycle, grouped in // one ref-stable object so the whole imperative surface is visible at a glance. // None of it is render output, which is exactly why it is not React state. // ───────────────────────────────────────────────────────────────────────────── type LiveState = { resolved: ResolvedColors | null; // colors read off the live DOM — feeds builds and rAF loops hoveredKey: string | null; // tooltip's view of hover — the legend's twin lives in React state hasRevealed: boolean; // the intro draw-in already played on this chart instance revealEndsAt: number; // performance.now() timestamp when the entrance settles loadingRows: number[] | null; // skeleton data, lazily rolled and re-rolled per shimmer sweep categories: string[]; // x labels of the last build, for the brush label pills dataLength: number; // row count, for the datazoom index math plottedTops: Record; // per-series plotted line value per index, for pointer hit-testing seriesKeyByIndex: (string | undefined)[]; // built series order → key, so a polygon click's seriesIndex recovers its key past interleaved buffer/reveal/mini series companionIdsByKey: Map; // per-key silent companion series ids (buffer tail, reveal base) — highlighted/downplayed with their parent revealIndex: number | null; // hover-reveal pointer x-index (null = idle); read by builds and the reveal hover handler revealValues: Record; // per-area FULL per-datum points (with dot itemStyle), sliced to the cursor on hover without a rebuild brushRange: BrushRange; // live zoom window — carried through every rebuild brushGeom: BrushGeometry | null; // brush footer layout of the last build brushOverlay: BrushOverlayElements | null; // zrender elements, owned by syncBrushOverlay brushHover: { inside: boolean; left: boolean; right: boolean }; // Latest callbacks/flags for the imperative ECharts event handlers. handlers: { onBrushChange?: (range: { startIndex: number; endIndex: number }) => void; onSelectionChange?: (key: string | null) => void; clickableKeys: Set; selectedDataKey: string | null; brushFormatLabel?: (value: string, index: number) => string; seriesKeys: string[]; enableHoverHighlight: boolean; enableHoverReveal: boolean; }; // Update-style re-push for paths that bypass React entirely (theme flips, // resizes) — set by the sync effect. repush: () => void; }; // ───────────────────────────────────────────────────────────────────────────── // Component // ───────────────────────────────────────────────────────────────────────────── /** * Apache ECharts port of the EvilCharts area chart, exposing a compound-as-config * API so its JSX reads identically to the Recharts twin. The root owns the data, * config, selection state, loading skeleton, intro reveal, and optional zoom * brush; every visual part — ``, ``, ``, ``, * ``, `` — is composed as a declarative child that renders * nothing. The root walks those children by reference and drives a single * imperative ECharts instance. Fully self-contained: its only dependencies are * `react` and `echarts`. */ export function EChartsAreaChart>({ data, config, renderer = DEFAULT_ECHARTS_RENDERER, xDataKey, className, curveType = "linear", stackType = "default", animation = true, animationType = "left-to-right", enableHoverHighlight = false, enableHoverReveal = false, defaultSelectedDataKey = null, selectedDataKey: selectedDataKeyProp, onSelectionChange, isLoading = false, loadingPoints = LOADING_DEFAULT_POINTS, chartOptions, children, }: EChartsAreaChartProps) { const rawId = useId(); const chartId = `chart-${rawId.replace(/:/g, "")}`; const containerRef = useRef(null); const mountRef = useRef(null); const echartsRef = useRef(null); // The single imperative surface (see LiveState). `resolved` lives here rather // than in state: as state it forced an extra render pass and an effect whose // only job was to trigger the option push — the "chain of computations" // react.dev/learn/you-might-not-need-an-effect warns about. The object // identity is stable for the component's lifetime. const live = useRef({ resolved: null, hoveredKey: null, hasRevealed: false, revealEndsAt: 0, loadingRows: null, categories: [], dataLength: 0, plottedTops: {}, seriesKeyByIndex: [], companionIdsByKey: new Map(), revealIndex: null, revealValues: {}, brushRange: { start: 0, end: 100 }, brushGeom: null, brushOverlay: null, brushHover: { inside: false, left: false, right: false }, handlers: { onBrushChange: undefined, // set per-render from the child's onChange onSelectionChange, clickableKeys: new Set(), selectedDataKey: defaultSelectedDataKey, brushFormatLabel: undefined, // set per-render from the child's formatLabel seriesKeys: [], enableHoverHighlight, enableHoverReveal, }, repush: () => {}, }).current; // Skeleton rows roll lazily on first use — an impure useRef initializer would // re-roll Math.random() on every render. const loadingData = useCallback( () => (live.loadingRows ??= getLoadingData(loadingPoints)), [live, loadingPoints], ); const shouldReduceMotion = useReducedMotion(); // Selection is controlled when the `selectedDataKey` prop is provided; // otherwise the internal state (seeded by defaultSelectedDataKey) drives it. const [internalSelectedKey, setSelectedDataKey] = useState(defaultSelectedDataKey); const selectedDataKey = selectedDataKeyProp !== undefined ? selectedDataKeyProp : internalSelectedKey; // Hover-highlight mirrors into the legend (React state) and tooltip // (live.hoveredKey — its formatter runs on every hover, and pushing an option // to sync it would reset ECharts' blur state mid-hover). const [hoveredDataKey, setHoveredDataKey] = useState(null); // ── Declarative config, collected from children by reference ───────────────── const collected = useMemo(() => collectConfig(children), [children]); const { areas, xAxis: xAxisSlot, yAxis: yAxisSlot, showGrid, tooltip: tooltipSlot, legend: legendSlot, brush: brushSlot, } = collected; // Brush is a child now (not props): presence turns it on, its props // carry height/formatLabel/onChange. const showBrush = brushSlot.present; const brushHeight = brushSlot.height ?? 56; const seriesKeys = useMemo(() => areas.map((area) => area.dataKey), [areas]); // x category key: → root xDataKey → first data column no claims. const xCategoryKey = useMemo(() => { if (xAxisSlot.dataKey) return xAxisSlot.dataKey; if (xDataKey) return xDataKey as string; const firstRow = data[0]; if (firstRow) { const claimed = new Set(seriesKeys); const found = Object.keys(firstRow).find((key) => !claimed.has(key)); if (found) return found; } return ""; }, [xAxisSlot.dataKey, xDataKey, data, seriesKeys]); // The intro draw-in follows the first area's setting, falling back to the root default. const effectiveAnimation = areas[0]?.animationType ?? animationType; const css = useMemo(() => buildChartCss(chartId, config), [chartId, config]); const hasSelection = selectedDataKey !== null; const isExpanded = stackType === "expanded"; const isStacked = stackType === "stacked" || isExpanded; // Which series may be clicked to toggle selection (consulted by the click handler). const clickableKeys = useMemo( () => new Set(areas.filter((area) => area.isClickable).map((area) => area.dataKey)), [areas], ); // Refresh the handlers' snapshot of the latest callbacks/flags every render. live.handlers = { onBrushChange: brushSlot.onChange, onSelectionChange, clickableKeys, selectedDataKey, brushFormatLabel: brushSlot.formatLabel, seriesKeys, enableHoverHighlight, enableHoverReveal, }; live.dataLength = data.length; // Reads the CURRENT selection through live.handlers so the identity stays // stable for the init effect's click closure, and stays correct when the // selection is controlled from outside. const toggleSelection = useCallback( (key: string) => { const next = live.handlers.selectedDataKey === key ? null : key; // Making a selection hands the canvas to the selection dim — clear any // active hover highlight at that moment so it doesn't linger in the // legend/tooltip or fight the notMerge rebuild that follows. if (next !== null && live.hoveredKey !== null) { const previous = live.hoveredKey; live.hoveredKey = null; setHoveredDataKey(null); echartsRef.current?.dispatchAction({ type: "downplay", seriesIndex: live.handlers.seriesKeys.indexOf(previous), }); } setSelectedDataKey(next); live.handlers.onSelectionChange?.(next); }, [live], ); // Reposition the brush overlays from the live refs — safe to call from drag // events, hover tracking, and pushes alike, since it never touches setOption. const syncBrushOverlayNow = useCallback(() => { const chart = echartsRef.current; if (!chart) return; const geom = live.brushGeom; const tokens = live.resolved?.tokens; if (!geom || !tokens) { syncBrushOverlay(chart, live, null); return; } const range = live.brushRange; const categories = live.categories; const format = live.handlers.brushFormatLabel; const lastIndex = Math.max(categories.length - 1, 0); const startIndex = Math.round((range.start / 100) * lastIndex); const endIndex = Math.round((range.end / 100) * lastIndex); const labels = format && categories.length ? { start: format(categories[startIndex] ?? "", startIndex), end: format(categories[endIndex] ?? "", endIndex), } : null; syncBrushOverlay(chart, live, { range, geom, size: { width: chart.getWidth(), height: chart.getHeight() }, tokens, labels, showLabels: live.brushHover.inside, hover: live.brushHover, }); }, [live]); // ── Option builder ───────────────────────────────────────────────────────── // Thin orchestrator over the pure builders above: snapshot the imperative // surface (refs, renderer size) into an OptionBuildContext, then assemble. const buildOption = useCallback((): EChartsOption => { const resolved = live.resolved; if (!resolved) return {}; const categories = data.map((row) => String(row[xCategoryKey])); live.categories = categories; // buildAreaSeries fills this with each area's full per-datum points (with the // multi-color dot itemStyle) so the reveal hover handler slices real data. const revealSink: Record = {}; const ctx: OptionBuildContext = { data, config, areas, seriesKeys, curveType, isStacked, isExpanded, selectedDataKey, hasSelection, showGrid, xAxisSlot, yAxisSlot, tooltipSlot, legendSlot, isLoading, loadingData, showBrush, brushHeight, enableHoverHighlight, enableHoverReveal, revealIndex: live.revealIndex, resolved, rendererSize: { width: echartsRef.current?.getWidth() ?? mountRef.current?.clientWidth ?? 0, height: echartsRef.current?.getHeight() ?? mountRef.current?.clientHeight ?? 0, }, categories, brushRange: live.brushRange, getHoveredKey: () => live.hoveredKey, revealSink, }; live.plottedTops = computePlottedTops(ctx); const { grid, brushBottom } = buildChartLayout(ctx); live.brushGeom = showBrush ? { bottom: brushBottom, height: brushHeight } : null; const { xAxis, yAxis } = buildMainAxes(ctx); if (isLoading) return buildLoadingOption(ctx, { grid, xAxis, yAxis }); const brush = showBrush ? buildBrushOption(ctx, brushBottom) : null; const series = [...buildAreaSeries(ctx), ...(brush?.miniSeries ?? [])]; // buildAreaSeries has now filled revealSink with each area's full per-datum // points — hand them to the hover handler for slicing. if (enableHoverReveal) live.revealValues = revealSink; // Record the exact series order so an area-polygon click (which reports only // a seriesIndex) can recover its key — buffer/reveal/mini/loading series // break the "index === key position" shortcut, so map each index to its id. live.seriesKeyByIndex = series.map((s) => { const id = String(s.id ?? ""); return id && !id.startsWith("__") ? id : undefined; }); // Map each key to its silent companion series ids (buffer tail, hover-reveal // base), mirroring exactly what buildAreaSeries emits — the hover handlers // highlight/downplay these with the parent so focus:"series" never strands // an area's own forecast tail or muted reveal base apart from it. const companionIdsByKey = new Map(); for (const area of areas) { const ids: string[] = []; if (area.enableBufferLine && data.length >= 2) { ids.push(`${BUFFER_PREFIX}${area.dataKey}`, `${BUFFERFILL_PREFIX}${area.dataKey}`); } if (enableHoverReveal) ids.push(`${REVEAL_PREFIX}${area.dataKey}`); if (ids.length) companionIdsByKey.set(area.dataKey, ids); } live.companionIdsByKey = companionIdsByKey; return { animation: false, grid: brush ? [grid, brush.miniGrid] : grid, xAxis: brush ? [xAxis, brush.miniXAxis] : xAxis, yAxis: brush ? [yAxis, brush.miniYAxis] : yAxis, tooltip: buildTooltipOption(ctx), dataZoom: brush?.dataZoom, series, }; }, [ live, data, config, areas, seriesKeys, xCategoryKey, curveType, isStacked, isExpanded, selectedDataKey, hasSelection, showGrid, xAxisSlot, yAxisSlot, tooltipSlot, legendSlot, isLoading, loadingData, showBrush, brushHeight, enableHoverHighlight, enableHoverReveal, ]); // ── Init + resize + theme observer (per renderer instance) ────────────────── useEffect(() => { const mount = mountRef.current; const container = containerRef.current; if (!mount || !container) return; // Pointer state belongs to the renderer instance. A renderer switch disposes // that surface without emitting mouseout/globalout, so do not carry a hover, // reveal slice, or brush-hover treatment into the replacement instance. // Keep brushRange: the selected zoom window should survive the switch. live.hoveredKey = null; live.revealIndex = null; live.brushHover = { inside: false, left: false, right: false }; setHoveredDataKey(null); const chart = echarts.init(mount, null, { renderer }); echartsRef.current = chart; const resizeObserver = new ResizeObserver(() => { // Observers always fire once right after observe(). Repushing on that // no-op fire would land one frame into the intro and stomp the line's // reveal clip — only react when the renderer size actually changed. if (mount.clientWidth === chart.getWidth() && mount.clientHeight === chart.getHeight()) { return; } chart.resize(); // 2D gradient textures are baked at renderer size — rebuild them to fit. live.repush(); }); resizeObserver.observe(mount); // Light/dark flips change no React state — re-resolve and push directly. const themeObserver = new MutationObserver(() => { live.repush(); }); themeObserver.observe(document.documentElement, { attributes: true, attributeFilter: ["class"], }); chart.on("click", (params) => { const { clickableKeys: clickable, seriesKeys: keys } = live.handlers; const p = params as { seriesId?: string; seriesIndex?: number; event?: { offsetX?: number; offsetY?: number }; }; // Symbol clicks carry seriesId; area-polygon clicks (triggerEvent) // only carry seriesIndex — recover the key from the last build's index map, // which accounts for the extra `__buffer-`/`__reveal-`/`__mini-` series // interleaved between the main ones (a raw seriesKeys lookup would miss). let id = p.seriesId ?? (typeof p.seriesIndex === "number" ? live.seriesKeyByIndex[p.seriesIndex] : undefined); // Overlapping polygons: the native hit is the topmost series, not the // band the pointer is visually inside — resolve geometrically. if (typeof p.event?.offsetX === "number" && typeof p.event?.offsetY === "number") { const resolved = resolveAreaAtPixel( chart, live.plottedTops, keys, p.event.offsetX, p.event.offsetY, ); if (resolved) id = resolved; } if (typeof id === "string" && clickable.has(id)) toggleSelection(id); }); // Hover-highlight is POINTER-driven, not series-mouseover-driven: // overlapping polygons would pin the native hover on the topmost series and // never re-fire while the pointer moves within it. A zrender mousemove // tracker resolves the visually-hovered band, drives the canvas emphasis // via dispatchAction, and mirrors into the HTML legend (React state) and // tooltip (live.hoveredKey — its formatter runs per pointer move). const applyHoverKey = (key: string | null) => { if (live.hoveredKey === key) return; const previous = live.hoveredKey; live.hoveredKey = key; setHoveredDataKey(key); // Dispatch by seriesId (buffer/reveal series shift the numeric indices), and // link each key's silent companions (buffer tail, reveal base) so // focus:"series" never strands them apart from their parent. if (previous) { chart.dispatchAction({ type: "downplay", seriesId: previous }); for (const id of live.companionIdsByKey.get(previous) ?? []) chart.dispatchAction({ type: "downplay", seriesId: id }); } if (key) { chart.dispatchAction({ type: "highlight", seriesId: key }); for (const id of live.companionIdsByKey.get(key) ?? []) chart.dispatchAction({ type: "highlight", seriesId: id }); } }; // Hover-reveal: color each area up to the pointer's x-index, mute the rest. // Purely TARGETED series updates (real series data + muted base opacity) — we // NEVER rebuild the whole option on mousemove, which would replay transitions // and fight the tooltip's axis pointer. const pushReveal = (idx: number | null) => { const keys = live.handlers.seriesKeys; const on = idx !== null; chart.setOption( { series: keys.flatMap((key) => [ { id: key, data: on ? sliceToNull(live.revealValues[key] ?? [], idx) : (live.revealValues[key] ?? []), }, { id: `${REVEAL_PREFIX}${key}`, // Gray tail keeps only the region from the cursor onward. data: on ? sliceFrom(live.revealValues[key] ?? [], idx) : (live.revealValues[key] ?? []), lineStyle: { opacity: on ? 0.3 : 0 }, }, ]), }, // NOT lazy: the highlight dispatched just below re-draws the active dot // the setOption wipes, so the option must be committed first — a queued // (lazy) update would land after the dispatch and erase the dot again. { silent: true }, ); // The per-frame setOption above cancels the axis tooltip's transient hover // symbol, so the never lands at the cursor. Re-assert it: // highlighting a real series at the cursor index draws its emphasis symbol // (the active dot) even with showSymbol:false; downplay clears it on exit. for (const key of keys) { chart.dispatchAction( on ? { type: "highlight", seriesId: key, dataIndex: idx as number } : { type: "downplay", seriesId: key }, ); } }; const applyReveal = (event: { offsetX?: number; offsetY?: number }) => { const len = live.dataLength; if (len < 1) return; const x = event.offsetX ?? -1; const y = event.offsetY ?? -1; if (!chart.containPixel({ gridIndex: 0 }, [x, y])) { clearReveal(); return; } const raw = chart.convertFromPixel({ gridIndex: 0 }, [x, y])[0]; const idx = Math.max(0, Math.min(len - 1, Math.round(raw))); if (idx === live.revealIndex) return; live.revealIndex = idx; pushReveal(idx); }; const clearReveal = () => { if (live.revealIndex === null) return; live.revealIndex = null; pushReveal(null); }; const zrHover = chart.getZr(); const onZrHoverMove = (event: { offsetX?: number; offsetY?: number }) => { // Reveal is a standalone hover mode and takes precedence over highlight. if (live.handlers.enableHoverReveal) { applyReveal(event); return; } if (!live.handlers.enableHoverHighlight) return; // A click selection owns the canvas dim — hover highlighting stops // entirely while one exists and resumes once it clears. if (live.handlers.selectedDataKey !== null) return; applyHoverKey( resolveAreaAtPixel( chart, live.plottedTops, live.handlers.seriesKeys, event.offsetX ?? -1, event.offsetY ?? -1, ), ); }; const onZrHoverOut = () => { if (live.handlers.enableHoverReveal) clearReveal(); else if (live.handlers.enableHoverHighlight) applyHoverKey(null); }; zrHover.on("mousemove", onZrHoverMove); zrHover.on("globalout", onZrHoverOut); // The native hover still emphasizes whichever element the pointer entered — // cancel it whenever it disagrees with the tracker's resolved key. chart.on("mouseover", (params) => { const { enableHoverHighlight: hoverOn, enableHoverReveal: revealOn } = live.handlers; if (!hoverOn || revealOn) return; // While a selection is active, hover highlighting is disabled — never // dispatch emphasis/downplay so the selection dim is the only dimming. if (live.handlers.selectedDataKey !== null) return; const p = params as { seriesIndex?: number; componentType?: string }; if (p.componentType !== "series" || typeof p.seriesIndex !== "number") return; const key = live.seriesKeyByIndex[p.seriesIndex]; if (!key || key.startsWith("__")) return; if (key !== live.hoveredKey) { chart.dispatchAction({ type: "downplay", seriesIndex: p.seriesIndex }); if (live.hoveredKey) { chart.dispatchAction({ type: "highlight", seriesId: live.hoveredKey }); } } }); chart.on("datazoom", () => { const option = chart.getOption() as { dataZoom?: { start?: number; end?: number }[] }; const zoom = option.dataZoom?.[0]; if (!zoom) return; // Ride the selection — pure zrender updates, so the drag stays 1:1. live.brushRange = { start: zoom.start ?? 0, end: zoom.end ?? 100 }; syncBrushOverlayNow(); const { onBrushChange: onChange } = live.handlers; if (!onChange) return; const len = live.dataLength; const startIndex = Math.round(((zoom.start ?? 0) / 100) * (len - 1)); const endIndex = Math.round(((zoom.end ?? 100) / 100) * (len - 1)); onChange({ startIndex, endIndex }); }); // Hover tracking for the overlay: labels show while the pointer is over the // brush, and each pill brightens when the pointer is near its edge. const zr = chart.getZr(); const applyHover = (next: { inside: boolean; left: boolean; right: boolean }) => { const prev = live.brushHover; if (prev.inside === next.inside && prev.left === next.left && prev.right === next.right) { return; } live.brushHover = next; syncBrushOverlayNow(); }; const onZrMove = (event: { offsetX?: number; offsetY?: number }) => { const geom = live.brushGeom; if (!geom) return; const x = event.offsetX ?? -1; const y = event.offsetY ?? -1; const top = chart.getHeight() - geom.bottom - geom.height; const inside = y >= top - 4 && y <= top + geom.height + 4; const trackLeft = 8; const trackWidth = Math.max(chart.getWidth() - 16, 1); const { start, end } = live.brushRange; const selectionLeft = trackLeft + (trackWidth * start) / 100; const selectionRight = trackLeft + (trackWidth * end) / 100; applyHover({ inside, left: inside && Math.abs(x - selectionLeft) <= 8, right: inside && Math.abs(x - selectionRight) <= 8, }); }; const onZrOut = () => applyHover({ inside: false, left: false, right: false }); zr.on("mousemove", onZrMove); zr.on("globalout", onZrOut); return () => { zrHover.off("mousemove", onZrHoverMove); zrHover.off("globalout", onZrHoverOut); zr.off("mousemove", onZrMove); zr.off("globalout", onZrOut); resizeObserver.disconnect(); themeObserver.disconnect(); chart.dispose(); echartsRef.current = null; // The overlay elements died with the zrender instance. live.brushOverlay = null; // The reveal guard belongs to the chart instance it guarded. Without this // reset, StrictMode's dev-only mount→unmount→remount plays the entrance on // the throwaway instance and the surviving one renders without it. live.hasRevealed = false; }; // eslint-disable-next-line react-hooks/exhaustive-deps }, [renderer]); // ── Sync ECharts with props/theme/selection — resolve, build, push ──────────── useEffect(() => { const chart = echartsRef.current; const container = containerRef.current; if (!chart || !container) return; // Colors come from the