{
  "$schema": "https://uipkge.dev/schema/registry-item.json",
  "name": "bar-race-chart",
  "title": "Bar Race Chart",
  "type": "registry:ui",
  "files": [
    {
      "path": "packages/registry-angular/components/charts/bar-race-chart/bar-race-chart.component.ts",
      "content": "import {\n  AfterViewInit,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  inject,\n  Input,\n  OnChanges,\n  OnDestroy,\n  SimpleChanges,\n  ViewChild,\n  ChangeDetectionStrategy,\n} from '@angular/core'\nimport type * as echarts from 'echarts/core'\nimport { cn } from '@/lib/utils'\nimport {\n  getChartColors,\n  getChartTextColor,\n  getChartAxisColor,\n  getChartSplitLineColor,\n  getChartTooltipBg,\n  getChartTooltipBorder,\n  getChartTooltipText,\n  mergeOptionBlock,\n} from '../use-chart-theme'\n\nexport interface RaceFrame {\n  /** Frame caption, e.g. a year. */\n  label: string\n  values: { category: string; value: number }[]\n}\n\n/**\n * Angular port of the UIPKGE BarRaceChart — ranked frames rendered as horizontal bars that\n * auto-advance at runtime with smooth resorting. Standalone, theme-aware. Same inputs as the\n * React/Vue `BarRaceChart` (`frames`, `topN`, `autoPlay`, `interval`, `height`, `option`).\n */\n@Component({\n  changeDetection: ChangeDetectionStrategy.Eager,\n  selector: 'ui-bar-race-chart, [ui-bar-race-chart]',\n  standalone: true,\n  host: {\n    '[attr.data-slot]': '\"bar-race-chart\"',\n    '[attr.data-uipkge]': '\"\"',\n    '[class]': 'hostClass',\n    '[attr.role]': '\"img\"',\n    '[attr.aria-label]': 'accessibleLabel',\n    '[attr.tabindex]': '0',\n    '[style.height]': 'heightStyle',\n  },\n  template: `<div #chartEl class=\"size-full\"></div>`,\n})\nexport class UiBarRaceChartComponent implements AfterViewInit, OnChanges, OnDestroy {\n  /** Ranked frames: `{ label, values: { category, value }[] }`. */\n  @Input() frames: RaceFrame[] = []\n  /** Rows shown per frame. Default 8. */\n  @Input() topN = 8\n  /** Auto-advance frames at runtime. Default true. */\n  @Input() autoPlay = true\n  /** ms between frames. Default 1400. */\n  @Input() interval = 1400\n  @Input() height: number | string = 380\n  @Input() option?: Record<string, unknown>\n  /** Accessible name announced for the chart image. Defaults to \"Bar race chart, frame <label>\". */\n  @Input() ariaLabel?: string\n  @Input('class') className?: string\n\n  @ViewChild('chartEl', { static: false }) chartEl?: ElementRef<HTMLDivElement>\n\n  private chart: echarts.ECharts | null = null\n  private unsubscribeTheme: (() => void) | null = null\n  private timer: ReturnType<typeof setInterval> | undefined\n  private cursor = 0\n\n  private cdr?: ChangeDetectorRef\n\n  constructor() {\n    try {\n      this.cdr = inject(ChangeDetectorRef, { optional: true }) ?? undefined\n    } catch {\n      // Instantiated outside injection context (e.g. unit tests)\n    }\n  }\n\n  get hostClass(): string {\n    return cn('block focus-visible:ring-ring w-full focus-visible:ring-2 focus-visible:outline-none', this.className)\n  }\n\n  get heightStyle(): string {\n    return /^\\d+$/.test(String(this.height)) ? `${this.height}px` : String(this.height)\n  }\n\n  currentFrame(): RaceFrame {\n    return this.frames[Math.min(this.cursor, this.frames.length - 1)] ?? { label: '', values: [] }\n  }\n\n  get accessibleLabel(): string {\n    return this.ariaLabel || `Bar race chart, frame ${this.currentFrame().label}`\n  }\n\n  /** Build the merged ECharts option for the current frame (pure — no DOM needed, unit-testable). */\n  getOption(): Record<string, unknown> {\n    const frame = this.currentFrame()\n    const rows = [...frame.values]\n      .sort((a, b) => b.value - a.value)\n      .slice(0, this.topN)\n      .reverse()\n    const colors = getChartColors()\n    const max = Math.max(...rows.map((r) => r.value), 1)\n    const series = [\n      {\n        type: 'bar',\n        barWidth: 16,\n        realtimeSort: true,\n        itemStyle: { color: colors[0], borderRadius: [6, 6, 6, 6] },\n        label: { show: true, position: 'right', color: getChartTextColor(), fontSize: 11, fontWeight: 600 },\n        data: rows.map((r) => r.value),\n      },\n    ]\n    const userOption: Record<string, any> = this.option ?? {}\n    const {\n      series: userSeries,\n      xAxis: userXAxis,\n      yAxis: userYAxis,\n      grid: userGrid,\n      tooltip: userTooltip,\n      ...userRest\n    } = userOption\n    const mergedSeries = Array.isArray(userSeries) ? series.map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) })) : series\n    return {\n      color: colors,\n      animationDurationUpdate: 900,\n      animationEasingUpdate: 'quinticInOut',\n      graphic: {\n        elements: [\n          {\n            type: 'text',\n            right: 16,\n            bottom: 8,\n            style: { text: frame.label, fontSize: 44, fontWeight: 800, fill: getChartAxisColor() },\n          },\n        ],\n      },\n      grid: mergeOptionBlock(\n        { left: 16, right: 64, top: 16, bottom: 24, outerBoundsMode: 'same', outerBoundsContain: 'axisLabel' },\n        userGrid,\n      ),\n      tooltip: mergeOptionBlock(\n        {\n          trigger: 'axis',\n          axisPointer: { type: 'shadow' },\n          backgroundColor: getChartTooltipBg(),\n          borderColor: getChartTooltipBorder(),\n          textStyle: { color: getChartTooltipText(), fontSize: 12 },\n        },\n        userTooltip,\n      ),\n      legend: { show: false },\n      xAxis: mergeOptionBlock(\n        {\n          type: 'value',\n          max: max * 1.25,\n          splitLine: { lineStyle: { color: getChartSplitLineColor() } },\n          axisLabel: { color: getChartTextColor(), fontSize: 11 },\n        },\n        userXAxis,\n      ),\n      yAxis: mergeOptionBlock(\n        {\n          type: 'category',\n          inverse: true,\n          data: rows.map((r) => r.category),\n          axisLine: { show: false },\n          axisLabel: { color: getChartTextColor(), fontSize: 11, fontWeight: 600 },\n          axisTick: { show: false },\n          animationDuration: 300,\n          animationDurationUpdate: 300,\n        },\n        userYAxis,\n      ),\n      series: mergedSeries,\n      ...userRest,\n    }\n  }\n\n  async ngAfterViewInit(): Promise<void> {\n    if (typeof window === 'undefined' || !this.chartEl?.nativeElement) return\n    const [{ use }, { CanvasRenderer }, { BarChart: EChartsBarChart }, comps] = await Promise.all([\n      import('echarts/core'),\n      import('echarts/renderers'),\n      import('echarts/charts'),\n      import('echarts/components'),\n    ])\n    use([\n      CanvasRenderer,\n      EChartsBarChart,\n      comps.GridComponent,\n      comps.TooltipComponent,\n      comps.GraphicComponent,\n      comps.LegendComponent,\n    ])\n    const { init } = await import('echarts/core')\n    this.chart = init(this.chartEl.nativeElement)\n    this.chart.setOption(this.getOption())\n    const { onChartThemeChange } = await import('../use-chart-theme')\n    this.unsubscribeTheme = onChartThemeChange(() => this.chart?.setOption(this.getOption()))\n    this.restartTimer()\n    if (typeof ResizeObserver !== 'undefined') {\n      new ResizeObserver(() => this.chart?.resize()).observe(this.chartEl.nativeElement)\n    }\n  }\n\n  private restartTimer(): void {\n    clearInterval(this.timer)\n    this.timer = undefined\n    if (!this.autoPlay || this.frames.length < 2 || this.interval <= 0) return\n    this.timer = setInterval(() => {\n      this.cursor = (this.cursor + 1) % this.frames.length\n      this.chart?.setOption(this.getOption())\n      this.cdr?.markForCheck()\n    }, this.interval)\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    if (changes['autoPlay'] || changes['interval'] || changes['frames']) this.restartTimer()\n    if (\n      this.chart &&\n      (changes['frames'] || changes['topN'] || changes['option'] || changes['autoPlay'] || changes['interval'])\n    ) {\n      this.chart.setOption(this.getOption())\n    }\n  }\n\n  ngOnDestroy(): void {\n    clearInterval(this.timer)\n    this.timer = undefined\n    this.unsubscribeTheme?.()\n    this.unsubscribeTheme = null\n    try {\n      this.chart?.dispose()\n    } catch {\n      /* already disposed */\n    }\n    this.chart = null\n  }\n}\n",
      "type": "registry:ui",
      "target": "~/src/app/components/ui/charts/bar-race-chart/bar-race-chart.component.ts"
    },
    {
      "path": "packages/registry-angular/components/charts/bar-race-chart/index.ts",
      "content": "export { UiBarRaceChartComponent } from './bar-race-chart.component'\n",
      "type": "registry:ui",
      "target": "~/src/app/components/ui/charts/bar-race-chart/index.ts"
    },
    {
      "path": "packages/registry-angular/components/charts/use-chart-theme.ts",
      "content": "// Angular port of `useChartTheme.ts` (Vue) — framework-free helpers + plain\n// functions instead of Vue `computed` refs. The palette is driven by Tailwind\n// v4 CSS variables (`--chart-1`..`--chart-5`, `--muted-foreground`, `--border`,\n// `--popover`, …) so dark/light flips happen automatically when the consumer\n// toggles their theme class. Values resolve at runtime via `getComputedStyle`,\n// so they pick up whatever the consumer set in their own `tailwind.css`.\n//\n// In a non-DOM environment (SSR / unit tests) every accessor returns the\n// fallback palette, which roughly matches the shadcn Neutral defaults so the\n// first paint doesn't flicker.\n\nexport const CHART_FALLBACK = ['#f59e0b', '#14b8a6', '#3b82f6', '#f97316', '#eab308']\n\n// ECharts' canvas renderer does not accept OKLCH in every browser. Assigning\n// one of our Tailwind tokens to `fillStyle` can silently leave the sentinel\n// colour in place, turning a whole chart black. Convert OKLCH ourselves and\n// let the canvas normalize older CSS colour formats.\nlet _hexCanvas: CanvasRenderingContext2D | null = null\n\nexport function toCanvasColor(cssColor: string): string {\n  const value = cssColor.trim()\n  const match = value.match(\n    /^oklch\\(\\s*([+-]?(?:\\d+\\.?\\d*|\\.\\d+))(%?)\\s+([+-]?(?:\\d+\\.?\\d*|\\.\\d+))\\s+([+-]?(?:\\d+\\.?\\d*|\\.\\d+))(?:deg)?(?:\\s*\\/\\s*([+-]?(?:\\d+\\.?\\d*|\\.\\d+))(%?))?\\s*\\)$/i,\n  )\n\n  if (match) {\n    const lightness = Number(match[1]) / (match[2] === '%' ? 100 : 1)\n    const chroma = Number(match[3])\n    const hue = (Number(match[4]) * Math.PI) / 180\n    const alpha = match[5] == null ? 1 : Number(match[5]) / (match[6] === '%' ? 100 : 1)\n    const a = chroma * Math.cos(hue)\n    const b = chroma * Math.sin(hue)\n\n    const l = Math.pow(lightness + 0.3963377774 * a + 0.2158037573 * b, 3)\n    const m = Math.pow(lightness - 0.1055613458 * a - 0.0638541728 * b, 3)\n    const s = Math.pow(lightness - 0.0894841775 * a - 1.291485548 * b, 3)\n    const linear = [\n      4.0767416621 * l - 3.3077115913 * m + 0.2309699292 * s,\n      -1.2684380046 * l + 2.6097574011 * m - 0.3413193965 * s,\n      -0.0041960863 * l - 0.7034186147 * m + 1.707614701 * s,\n    ]\n    const rgb = linear.map((channel) => {\n      const encoded = channel <= 0.0031308 ? 12.92 * channel : 1.055 * Math.pow(channel, 1 / 2.4) - 0.055\n      return Math.round(Math.min(1, Math.max(0, encoded)) * 255)\n    })\n\n    return alpha < 1 ? `rgba(${rgb.join(', ')}, ${alpha})` : `rgb(${rgb.join(', ')})`\n  }\n\n  if (typeof document === 'undefined') return cssColor\n  if (!_hexCanvas) {\n    _hexCanvas = document.createElement('canvas').getContext('2d')\n  }\n  if (!_hexCanvas) return cssColor\n  _hexCanvas.fillStyle = '#010203'\n  _hexCanvas.fillStyle = value\n  const normalized = _hexCanvas.fillStyle as string\n  return normalized === '#010203' && value.toLowerCase() !== '#010203' ? value : normalized\n}\n\n// Convert any CSS color (hex, rgb, oklch, color()) + alpha 0..1 to a\n// canvas-safe rgba(r,g,b,a). `colorString + '40'` (8-digit hex alpha)\n// only works when `colorString` is `#rrggbb`; once tokens resolve to\n// oklch() post-hydration the gradient stops break and the canvas paint\n// throws every frame. Stay defensive and always return rgba.\nexport function toRgba(cssColor: string, alpha: number): string {\n  const normalized = toCanvasColor(cssColor)\n  if (normalized.startsWith('#') && normalized.length === 7) {\n    const r = parseInt(normalized.slice(1, 3), 16)\n    const g = parseInt(normalized.slice(3, 5), 16)\n    const b = parseInt(normalized.slice(5, 7), 16)\n    return `rgba(${r},${g},${b},${alpha})`\n  }\n  if (normalized.startsWith('rgba(')) {\n    return normalized.replace(/,\\s*[\\d.]+\\s*\\)$/, `,${alpha})`)\n  }\n  if (normalized.startsWith('rgb(')) {\n    return normalized.replace(/^rgb\\(/, 'rgba(').replace(/\\)$/, `,${alpha})`)\n  }\n  // Canvas refused to parse this color -- ship the original string and\n  // let ECharts complain (better than crashing the paint loop).\n  return cssColor\n}\n\nexport function resolveCssVar(name: string, fallback: string): string {\n  if (typeof window === 'undefined') return fallback\n  const v = getComputedStyle(document.documentElement).getPropertyValue(name).trim()\n  if (!v) return fallback\n  return toCanvasColor(v)\n}\n\nexport function getChartColors(): string[] {\n  return Array.from({ length: 5 }, (_, i) => resolveCssVar(`--chart-${i + 1}`, CHART_FALLBACK[i]!))\n}\n\nexport function getChartTextColor(): string {\n  return resolveCssVar('--muted-foreground', '#888888')\n}\n\nexport function getChartAxisColor(): string {\n  return resolveCssVar('--border', '#e5e5e5')\n}\n\nexport function getChartSplitLineColor(): string {\n  return resolveCssVar('--border', '#f0f0f0')\n}\n\nexport function getChartTooltipBg(): string {\n  return resolveCssVar('--popover', 'rgba(255,255,255,0.96)')\n}\n\nexport function getChartTooltipBorder(): string {\n  return resolveCssVar('--border', '#e5e5e5')\n}\n\nexport function getChartTooltipText(): string {\n  return resolveCssVar('--popover-foreground', '#333333')\n}\n\nexport function getChartBgColor(): string {\n  return resolveCssVar('--card', resolveCssVar('--background', '#ffffff'))\n}\n\n// The app's accent, for the one highlighted element on a chart or map — a\n// selected route, a focused bar. Category series keep using getChartColors().\nexport function getChartAccentColor(): string {\n  return resolveCssVar('--primary', '#38bdf8')\n}\n\n// Out-of-bounds / failure colour for charts that encode good vs bad rather\n// than a category — control limits, error series.\nexport function getChartDangerColor(): string {\n  return resolveCssVar('--destructive', '#dc2626')\n}\n\n// Two-level deep merge for ECharts option blocks (xAxis, yAxis, grid,\n// tooltip, legend, singleAxis, parallel, etc.). The top-level keys merge\n// shallowly, but one nested level (axisLabel, axisLine, splitLine, etc.)\n// merges shallowly too so a consumer passing `xAxis: { axisLabel: { fontSize: 9 } }`\n// doesn't blow away the wrapper's `color` + base font defaults on the same\n// axisLabel block. Arrays + primitives replace outright.\nexport function mergeOptionBlock<T extends Record<string, any>>(base: T, user: Partial<T> | undefined): T {\n  if (!user) return base\n  const out: any = { ...base }\n  for (const k of Object.keys(user)) {\n    const bv = (base as any)[k]\n    const uv = (user as any)[k]\n    if (\n      bv != null &&\n      uv != null &&\n      typeof bv === 'object' &&\n      typeof uv === 'object' &&\n      !Array.isArray(bv) &&\n      !Array.isArray(uv)\n    ) {\n      out[k] = { ...bv, ...uv }\n    } else {\n      out[k] = uv\n    }\n  }\n  return out\n}\n\n// Default gauge stoplight: teal (safe) -> amber (warning) -> red (danger).\n// Static because gauges have semantic meaning (green safe / red danger) that\n// we deliberately don't theme-flip.\nexport const gaugeThresholds: [number, string][] = [\n  [0.6, '#14b8a6'],\n  [0.85, '#f59e0b'],\n  [1, '#dc2626'],\n]\n\n/**\n * Re-render callback subscription for theme flips: bumps every listener\n * whenever `<html>` class/style changes (the typical shadcn dark-mode pivot)\n * so chart components can rebuild their options and re-paint. Returns an\n * unsubscribe function. No-op (never fires) outside the DOM.\n */\nexport function onChartThemeChange(cb: () => void): () => void {\n  if (typeof window === 'undefined' || typeof MutationObserver === 'undefined') return () => {}\n  const observer = new MutationObserver(() => cb())\n  observer.observe(document.documentElement, { attributes: true, attributeFilter: ['class', 'style', 'data-theme'] })\n  return () => observer.disconnect()\n}\n",
      "type": "registry:ui",
      "target": "~/src/app/components/ui/charts/use-chart-theme.ts"
    }
  ],
  "dependencies": [
    "echarts"
  ],
  "devDependencies": [],
  "registryDependencies": [],
  "description": "Animated bar-race chart around Apache ECharts. Auto-advancing ranked frames with smooth resort transitions. Theme-aware via registry tokens.",
  "categories": [
    "chart"
  ]
}