perf: 完整性能优化 - JS按需加载 + 字体子集化 + 自动化
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#!/usr/bin/env python3
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"""
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字体子集化脚本 - 安全版本
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从HTML和CSS文件中提取实际使用的字符，生成优化的子集字体
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"""
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import os
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import re
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import sys
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from fontTools.ttLib import TTFont
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from fontTools.subset import Subsetter, Options
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def extract_chars_from_files(directories, extensions=('.html', '.md', '.css')):
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"""从文件中提取使用的字符"""
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chars = set()
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for directory in directories:
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if not os.path.exists(directory):
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print(f"⚠️ 目录不存在，跳过: {directory}")
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continue
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print(f"🔍 扫描目录: {directory}")
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for root, dirs, files in os.walk(directory):
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for file in files:
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if any(file.endswith(ext) for ext in extensions):
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filepath = os.path.join(root, file)
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try:
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with open(filepath, 'r', encoding='utf-8') as f:
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content = f.read()
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# 提取中文字符
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chinese_chars = re.findall(r'[一-鿿]', content)
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chars.update(chinese_chars)
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# 提取中文标点
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cjk_punct = re.findall(r'[ -〿-]', content)
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chars.update(cjk_punct)
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# 提取英文和数字
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ascii_chars = re.findall(r'[a-zA-Z0-9]', content)
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chars.update(ascii_chars)
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# 提取常用英文标点
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en_punct = set('!@#$%^&*()_+-=[]{}|;:,.<>?/\\`~"\'-')
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chars.update(en_punct)
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except Exception as e:
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print(f"⚠️ 读取文件失败 {filepath}: {e}")
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return chars
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def subset_font(input_font_path, output_font_path, chars):
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"""生成子集字体"""
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print(f"\n📦 加载字体: {input_font_path}")
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# 检查输入文件
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if not os.path.exists(input_font_path):
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print(f"❌ 字体文件不存在: {input_font_path}")
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return False
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# 加载原始字体
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try:
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font = TTFont(input_font_path)
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except Exception as e:
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print(f"❌ 加载字体失败: {e}")
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return False
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# 获取原始字符数
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cmap = font.getBestCmap()
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original_count = len(cmap) if cmap else 0
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original_size = os.path.getsize(input_font_path)
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print(f"📊 原始字体信息:")
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print(f" 字符数: {original_count}")
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print(f" 文件大小: {original_size / 1024:.1f} KB")
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# 配置子集化选项
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options = Options()
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if output_font_path.endswith('.woff2'):
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options.flavor = 'woff2'
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elif output_font_path.endswith('.woff'):
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options.flavor = 'woff'
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options.desubroutinize = True
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options.layout_features = ['kern', 'liga'] # 保留基本的排版特性
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# 创建子集化器
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subsetter = Subsetter(options=options)
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# 填充字符集
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char_text = ''.join(chars)
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print(f"\n✂️ 正在生成子集字体...")
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print(f" 提取的字符数: {len(chars)}")
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try:
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subsetter.populate(text=char_text)
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subsetter.subset(font)
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except Exception as e:
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print(f"❌ 子集化失败: {e}")
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return False
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# 保存子集字体
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try:
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font.save(output_font_path)
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except Exception as e:
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print(f"❌ 保存字体失败: {e}")
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return False
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# 获取子集信息
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subset_size = os.path.getsize(output_font_path)
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subset_font_obj = TTFont(output_font_path)
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subset_cmap = subset_font_obj.getBestCmap()
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subset_count = len(subset_cmap) if subset_cmap else 0
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# 计算优化效果
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reduction = original_size - subset_size
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percentage = (reduction / original_size) * 100 if original_size > 0 else 0
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print(f"\n✅ 子集化完成！")
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print(f"📊 优化结果:")
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print(f" 子集字符数: {subset_count}")
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print(f" 子集文件大小: {subset_size / 1024:.1f} KB")
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print(f" 减少: {reduction / 1024:.1f} KB ({percentage:.1f}%)")
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# 验证是否真的优化了
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if subset_size >= original_size:
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print(f"\n⚠️ 警告: 子集字体反而变大了！")
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print(f" 原因可能是提取了太多字符")
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print(f" 建议检查扫描范围或使用更小的字符集")
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return False
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return True
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def main():
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print("🔤 字体子集化工具（安全版本）")
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print("=" * 50)
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# 配置路径
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font_dir = "themes/Ying/static/font"
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input_font = os.path.join(font_dir, "zql-v2.woff2")
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# 检查输入文件
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if not os.path.exists(input_font):
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print(f"❌ 字体文件不存在: {input_font}")
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print(f" 请确保在博客根目录运行此脚本")
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sys.exit(1)
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# 扫描目录（只扫描实际使用的目录）
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scan_dirs = ["content", "layouts"]
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# 检查public目录是否存在
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if os.path.exists("public"):
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scan_dirs.append("public")
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print(f"✅ 找到public目录，将扫描构建后的HTML")
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else:
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print(f"⚠️ 未找到public目录，请先运行: hugo --destination=public")
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print(f" 将只扫描content和layouts目录")
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print(f"\n🔍 扫描目录: {', '.join(scan_dirs)}")
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# 提取字符
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chars = extract_chars_from_files(scan_dirs)
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print(f"\n📝 提取了 {len(chars)} 个唯一字符")
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if len(chars) == 0:
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print("❌ 未找到任何字符，请检查扫描目录")
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sys.exit(1)
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# 保存字符列表（用于调试）
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chars_file = os.path.join(font_dir, "used_chars.txt")
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with open(chars_file, 'w', encoding='utf-8') as f:
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sorted_chars = sorted(chars)
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f.write(''.join(sorted_chars))
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print(f"💾 字符列表已保存到: {chars_file}")
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# 显示部分字符（用于验证）
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sample_chars = sorted(list(chars))[:50]
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print(f"📋 前50个字符: {''.join(sample_chars)}")
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# 生成woff2子集字体
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output_woff2 = os.path.join(font_dir, "zql-v2-subset.woff2")
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print(f"\n{'='*50}")
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print(f"🎯 生成 woff2 子集字体...")
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success_woff2 = subset_font(input_font, output_woff2, chars)
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# 生成woff子集字体
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output_woff = os.path.join(font_dir, "zql-v2-subset.woff")
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print(f"\n{'='*50}")
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print(f"🎯 生成 woff 子集字体...")
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success_woff = subset_font(input_font, output_woff, chars)
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# 总结
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print(f"\n{'='*50}")
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if success_woff2 and success_woff:
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print(f"🎉 所有子集字体生成成功！")
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# 显示最终文件大小
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print(f"\n📂 最终文件:")
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for f in [output_woff2, output_woff]:
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if os.path.exists(f):
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size = os.path.getsize(f)
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print(f" {os.path.basename(f)}: {size / 1024:.1f} KB")
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print(f"\n✅ 下一步:")
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print(f" 1. 更新CSS字体声明（将zql-v2.woff2改为zql-v2-subset.woff2）")
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print(f" 2. 重新构建Hugo: hugo server -D")
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print(f" 3. 测试字体显示是否正常")
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else:
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print(f"⚠️ 部分字体生成失败或未优化")
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print(f" 建议使用fallback方案（保留原始字体）")
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if __name__ == "__main__":
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main()
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