hatch-surf/node_modules/next/dist/esm/server/font-utils.js
Riley Zhang df378d33ef
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Merge GitHub main into Gitea repo (allow unrelated histories)
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Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-06-25 05:20:46 +02:00

33 lines
1.5 KiB
JavaScript

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)
};
}
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