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