James R. Barlow
5d49f75c56
SystemFontProvider.NOTO_FONT_PATTERNS enumerates about two dozen Noto families by name, and MultiFontManager only ever asked for those. Any script outside that list fell through to the glyphless Occulta fallback even when the correct font was installed, which is the common case on macOS: it ships around a hundred script-specific Noto faces in /System/Library/Fonts/Supplemental, almost none of which we knew how to ask for. The reporter had the fonts and still got told to install them. Add an optional GlyphSearchingFontProvider protocol (find_font_with_glyphs) implemented by SystemFontProvider, BuiltinFontProvider and ChainedFontProvider, and a new selection phase that uses it once the named families fail. The system scan enumerates every Noto face, reusing the existing variable-font/-Regular/-VF filename classification, and keeps only the font it selects so a full scan does not retain every font file on the system. Fonts found this way are remembered and retried by name for later words. Capability detection is isinstance-based so third-party providers keep working unchanged. The warning itself was also unactionable: it named neither the characters nor the script, which is why the reporter had to ask which package to install. It now identifies what it could not render, e.g. 'Ꮳ' U+13E3 CHEROKEE LETTER TSA. A word mixing scripts that no single font covers now gets a distinct message saying that installing fonts will not help, rather than sending the user after fonts they already have. Finally, the documented macOS install command was wrong: `brew install font-noto` does not exist, since Homebrew has no single Noto package, only a cask per family. The Fedora package name was also corrected, as google-noto-fonts-common ships no actual fonts.
35 lines
1012 B
Python
35 lines
1012 B
Python
# SPDX-FileCopyrightText: 2025 James R. Barlow
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# SPDX-License-Identifier: MPL-2.0
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"""Font management for OCRmyPDF PDF rendering.
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This module provides font infrastructure for the fpdf2 PDF renderer. It includes:
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- FontManager: Base class for font loading and glyph checking
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- FontProvider: Protocol and implementations for font discovery
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- MultiFontManager: Automatic font selection for multilingual documents
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- SystemFontProvider: System font discovery
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"""
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from __future__ import annotations
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from ocrmypdf.font.font_manager import FontManager
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from ocrmypdf.font.font_provider import (
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BuiltinFontProvider,
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ChainedFontProvider,
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FontProvider,
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GlyphSearchingFontProvider,
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)
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from ocrmypdf.font.multi_font_manager import MultiFontManager
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from ocrmypdf.font.system_font_provider import SystemFontProvider
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__all__ = [
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"FontManager",
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"FontProvider",
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"GlyphSearchingFontProvider",
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"BuiltinFontProvider",
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"ChainedFontProvider",
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"MultiFontManager",
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"SystemFontProvider",
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]
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