#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""生成包含繁体'遠'的字体子集"""

from fontTools.ttLib import TTFont
from fontTools.ttLib.tables import _h_m_t_x, _g_a_s_p
from fontTools.subset import Subsetter, Options

# 修补表解析以跳过损坏的数据
original_hmtx = _h_m_t_x.table__h_m_t_x.decompile
def patched_hmtx(self, data, ttFont):
    try:
        return original_hmtx(self, data, ttFont)
    except:
        self.metrics = {}
_h_m_t_x.table__h_m_t_x.decompile = patched_hmtx

original_gasp = _g_a_s_p.table__g_a_s_p.decompile
def patched_gasp(self, data, ttFont):
    try:
        return original_gasp(self, data, ttFont)
    except:
        self.gaspRanges = {}
_g_a_s_p.table__g_a_s_p.decompile = patched_gasp

# 加载字体
font = TTFont('src/app/fonts/AoyagiReisho.ttf')

# 删除损坏的表
for t in ['vmtx', 'gasp', 'VORG', 'mort', 'morx']:
    if t in font:
        del font[t]
        print(f'Deleted table: {t}')

# 创建子集器
subsetter = Subsetter()
options = Options()
options.drop_tables = ['gasp', 'vmtx', 'VORG', 'mort', 'morx', 'GSUB', 'GPOS', 'GDEF']
subsetter.options = options

# 目标字符: 睿(0x777f), 新(0x65b0), 致(0x81f4), 遠(0x9060), 空格(0x20)
unicodes = [0x20, 0x777f, 0x65b0, 0x81f4, 0x9060]
print(f'Target Unicode: {[hex(u) for u in unicodes]}')

subsetter.populate(unicodes=unicodes)

# 执行子集化
try:
    subsetter.subset(font)
except Exception as e:
    print(f'Warning during subsetting: {e}')

# 保存
output_path = 'src/app/fonts/AoyagiReisho-subset.ttf'
font.save(output_path)
font.close()
print(f'Saved to: {output_path}')

# 验证
verify_font = TTFont(output_path)
cmap = verify_font.getBestCmap()
chars = [chr(k) for k in sorted(cmap.keys())]
codes = [hex(k) for k in sorted(cmap.keys())]
print(f'Subset characters: {chars}')
print(f'Unicode codes: {codes}')
print(f'Contains U+9060 (遠): {0x9060 in cmap}')
verify_font.close()