MangoPig
61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
"""CJK font registration helper for reportlab using WenQuanYi Micro Hei TTF."""
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from reportlab.pdfbase import pdfmetrics
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from reportlab.pdfbase.ttfonts import TTFont
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_REGISTERED = False
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CJK_FONT = "Helvetica" # fallback
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def register_cjk_font():
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"""Register a CJK font with reportlab. Returns the font name to use."""
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global _REGISTERED, CJK_FONT
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if _REGISTERED:
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return CJK_FONT
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# WenQuanYi Micro Hei: TTC with TrueType outlines (reportlab compatible)
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# subfontIndex 0 = regular
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candidates = [
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"/usr/share/fonts/wenquanyi/wqy-microhei/wqy-microhei.ttc",
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"/usr/share/fonts/wqy-microhei/wqy-microhei.ttc",
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]
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for path in candidates:
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try:
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pdfmetrics.registerFont(TTFont("WenQuanYi", path, subfontIndex=0))
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CJK_FONT = "WenQuanYi"
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_REGISTERED = True
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return CJK_FONT
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except Exception:
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continue
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print("WARNING: No CJK font available, Chinese text may not render correctly")
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_REGISTERED = True
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return CJK_FONT
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def _has_cjk(text: str) -> bool:
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"""Check if text contains CJK characters."""
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for ch in text:
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cp = ord(ch)
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if (
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0x4E00 <= cp <= 0x9FFF # CJK Unified Ideographs
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or 0x3400 <= cp <= 0x4DBF # CJK Extension A
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or 0x3000 <= cp <= 0x303F # CJK Symbols
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or 0xFF00 <= cp <= 0xFFEF # Fullwidth Forms
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or 0x2E80 <= cp <= 0x2EFF # CJK Radicals
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or 0xF900 <= cp <= 0xFAFF # CJK Compatibility
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):
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return True
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return False
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def draw_cjk_text(c, x, y, text, font_name="Helvetica", font_size=10):
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"""Draw text, switching to CJK font if needed."""
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cjk_font = register_cjk_font()
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if _has_cjk(text) and cjk_font != "Helvetica":
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c.setFont(cjk_font, font_size)
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else:
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c.setFont(font_name, font_size)
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c.drawString(x, y, text)
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