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2026-05-02 20:07:02 +02:00
parent ce8672e283
commit 34dc9aec52
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+import { DEFAULT_SERIF_FONT, DEFAULT_SANS_SERIF_FONT } from '../shared/lib/constants';
+const capsizeFontsMetrics = require('next/dist/server/capsize-font-metrics.json');
+function formatName(str) {
+    return str.replace(/(?:^\w|[A-Z]|\b\w)/g, function(word, index) {
+        return index === 0 ? word.toLowerCase() : word.toUpperCase();
+    }).replace(/\s+/g, '');
+}
+function formatOverrideValue(val) {
+    return Math.abs(val * 100).toFixed(2);
+}
+export function calculateSizeAdjustValues(fontName) {
+    const fontKey = formatName(fontName);
+    const fontMetrics = capsizeFontsMetrics[fontKey];
+    let { category, ascent, descent, lineGap, unitsPerEm, xWidthAvg } = fontMetrics;
+    const mainFontAvgWidth = xWidthAvg / unitsPerEm;
+    const fallbackFont = category === 'serif' ? DEFAULT_SERIF_FONT : DEFAULT_SANS_SERIF_FONT;
+    const fallbackFontName = formatName(fallbackFont.name);
+    const fallbackFontMetrics = capsizeFontsMetrics[fallbackFontName];
+    const fallbackFontAvgWidth = fallbackFontMetrics.xWidthAvg / fallbackFontMetrics.unitsPerEm;
+    let sizeAdjust = xWidthAvg ? mainFontAvgWidth / fallbackFontAvgWidth : 1;
+    ascent = formatOverrideValue(ascent / (unitsPerEm * sizeAdjust));
+    descent = formatOverrideValue(descent / (unitsPerEm * sizeAdjust));
+    lineGap = formatOverrideValue(lineGap / (unitsPerEm * sizeAdjust));
+    return {
+        ascent,
+        descent,
+        lineGap,
+        fallbackFont: fallbackFont.name,
+        sizeAdjust: formatOverrideValue(sizeAdjust)
+    };
+}
+
+//# sourceMappingURL=font-utils.js.map