const SYSTEM_METRICS = {
  "Times New Roman": {
    ascent: 1825,
    descent: -443,
    lineGap: 87,
    unitsPerEm: 2048,
    xWidthAvg: 832
  },
  Arial: {
    ascent: 1854,
    descent: -434,
    lineGap: 67,
    unitsPerEm: 2048,
    xWidthAvg: 913
  },
  "Courier New": {
    ascent: 1705,
    descent: -615,
    lineGap: 0,
    unitsPerEm: 2048,
    xWidthAvg: 1229
  },
  BlinkMacSystemFont: {
    ascent: 1980,
    descent: -432,
    lineGap: 0,
    unitsPerEm: 2048,
    xWidthAvg: 853
  },
  "Segoe UI": {
    ascent: 2210,
    descent: -514,
    lineGap: 0,
    unitsPerEm: 2048,
    xWidthAvg: 908
  },
  Roboto: {
    ascent: 1900,
    descent: -500,
    lineGap: 0,
    unitsPerEm: 2048,
    xWidthAvg: 911
  },
  "Helvetica Neue": {
    ascent: 952,
    descent: -213,
    lineGap: 28,
    unitsPerEm: 1e3,
    xWidthAvg: 450
  }
};
const DEFAULT_FALLBACKS = {
  serif: ["Times New Roman"],
  "sans-serif": ["Arial"],
  monospace: ["Courier New"],
  "system-ui": ["BlinkMacSystemFont", "Segoe UI", "Roboto", "Helvetica Neue", "Arial"],
  "ui-serif": ["Times New Roman"],
  "ui-sans-serif": ["Arial"],
  "ui-monospace": ["Courier New"]
};
class RealSystemFallbacksProvider {
  getLocalFonts(fallback) {
    return DEFAULT_FALLBACKS[fallback] ?? null;
  }
  getMetricsForLocalFont(family) {
    return SYSTEM_METRICS[family];
  }
}
export {
  RealSystemFallbacksProvider
};
