39 lines
2.0 KiB
Python
39 lines
2.0 KiB
Python
#!/usr/bin/env python3
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"""从指定 v7.9 ZIP 重建本地字体：python3 scripts/prepare-maple-font.py /path/to/MapleMonoNormalNL-NF-CN.zip。
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仅重建字体时需要 fonttools[woff]；应用构建直接使用已入库的 WOFF2。
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来源：https://github.com/subframe7536/maple-font/releases/tag/v7.9
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"""
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import io
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from pathlib import Path
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import sys
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import zipfile
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from fontTools import subset
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from fontTools.ttLib import TTFont
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root = Path(__file__).resolve().parents[1] / 'web/src/themes'
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output = root / 'fonts/maple'
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output.mkdir(exist_ok=True)
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family = 'Maple Mono Normal NL NF CN'
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css = ['/* Maple Mono v7.9；由 scripts/prepare-maple-font.py 生成，授权见 fonts/maple/LICENSE.txt。 */']
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with zipfile.ZipFile(sys.argv[1]) as archive:
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(output / 'LICENSE.txt').write_bytes(archive.read('LICENSE.txt'))
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for variant, weight, style in [('Regular', 400, 'normal'), ('Bold', 700, 'normal'), ('Italic', 400, 'italic'), ('BoldItalic', 700, 'italic')]:
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data = archive.read('MapleMonoNormalNL-NF-CN-' + variant + '.ttf')
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source = TTFont(io.BytesIO(data))
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points = sorted(source.getBestCmap())
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# 按 Unicode 区间分片，中文和 Nerd Font 不强制随拉丁文字一起下载。
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for block in sorted({cp // 4096 for cp in points}):
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unicodes = [cp for cp in points if cp // 4096 == block]
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font = TTFont(io.BytesIO(data), recalcTimestamp=False)
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options = subset.Options()
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options.flavor = 'woff2'
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subsetter = subset.Subsetter(options=options)
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subsetter.populate(unicodes=unicodes)
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subsetter.subset(font)
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font.flavor = 'woff2'
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name = f'{variant.lower()}-{block:02x}.woff2'
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font.save(output / name)
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css.append(f"@font-face {{ font-family: '{family}'; font-style: {style}; font-weight: {weight}; font-display: block; src: url('./fonts/maple/{name}') format('woff2'); unicode-range: U+{block * 4096:X}-{(block + 1) * 4096 - 1:X}; }}")
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(root / 'maple-font.css').write_text('\n'.join(css) + '\n')
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