Mikkeli Matlock
4337a31b80
Major improvements to GUI stability and internationalization: - Fix GUI freezing by implementing threaded audio analysis - Add AudioAnalysisWorker thread for background processing - Progress signals with percentage updates - Thread-safe communication via Qt signals - Add comprehensive CLI logging system - 5 log levels: ERROR, WARN, INFO, DEBUG, TRACE - Command line control: --log-level, --log-file - Real-time feedback during analysis operations - Implement CJK font fallback system - FontManager with 3-tier fallback (custom → system → default) - Cross-platform CJK font detection (Windows/macOS/Linux) - Licensing-safe fonts/ directory with gitignored font files - Setup utility and comprehensive documentation - Fix numpy array formatting issue with BPM detection - Add progress indicators for long-running operations - Preserve fonts directory structure with placeholder file 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
357 lines
13 KiB
Python
357 lines
13 KiB
Python
"""
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Font management system with CJK fallback support.
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Handles matplotlib and Qt font configuration with licensing-safe approach.
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"""
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import os
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import logging
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import platform
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from pathlib import Path
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from typing import List, Optional, Dict, Any
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import matplotlib.pyplot as plt
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import matplotlib.font_manager as fm
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from PyQt5.QtCore import QCoreApplication
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from PyQt5.QtGui import QFontDatabase, QFont
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class FontManager:
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"""
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Centralized font management for CJK character support.
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Provides licensing-safe font fallback by:
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1. Loading fonts from local fonts/ directory (gitignored)
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2. Falling back to system CJK fonts
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3. Gracefully degrading to default fonts
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"""
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def __init__(self, fonts_dir: str = "fonts"):
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"""
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Initialize font manager.
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Args:
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fonts_dir: Directory name for custom fonts (relative to project root)
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"""
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self.logger = logging.getLogger(__name__)
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self.fonts_dir = Path(__file__).parent / fonts_dir
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self.loaded_fonts: Dict[str, str] = {}
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self._matplotlib_configured = False
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self._qt_configured = False
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# CJK font preferences by platform and type
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self.system_font_fallbacks = {
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'Windows': {
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'serif': ['Yu Mincho', 'MS Mincho', '游明朝', 'ＭＳ 明朝'],
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'sans-serif': ['Yu Gothic UI', 'Meiryo', 'MS Gothic', '游ゴシック', 'メイリオ', 'ＭＳ ゴシック'],
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'monospace': ['MS Gothic', 'ＭＳ ゴシック']
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},
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'Darwin': { # macOS
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'serif': ['Hiragino Mincho ProN', 'Yu Mincho', 'Times New Roman'],
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'sans-serif': ['Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Arial Unicode MS'],
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'monospace': ['Menlo', 'Monaco', 'Courier New']
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},
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'Linux': {
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'serif': ['Noto Serif CJK JP', 'Source Han Serif', 'DejaVu Serif'],
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'sans-serif': ['Noto Sans CJK JP', 'Source Han Sans', 'DejaVu Sans'],
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'monospace': ['Noto Sans Mono CJK JP', 'Source Code Pro', 'DejaVu Sans Mono']
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}
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}
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def initialize(self) -> bool:
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"""
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Initialize font system for both matplotlib and Qt.
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Returns:
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bool: True if initialization was successful
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"""
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try:
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self.logger.info("Initializing font management system...")
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# Load custom fonts if available
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custom_fonts_loaded = self._load_custom_fonts()
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# Configure matplotlib
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matplotlib_success = self._configure_matplotlib()
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# Configure Qt
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qt_success = self._configure_qt()
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success = matplotlib_success and qt_success
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if success:
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self.logger.info(f"Font system initialized successfully. Custom fonts: {custom_fonts_loaded}")
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else:
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self.logger.warning("Font system initialized with some issues")
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return success
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except Exception as e:
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self.logger.error(f"Font system initialization failed: {e}")
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return False
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def _load_custom_fonts(self) -> int:
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"""
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Load fonts from the fonts/ directory if it exists.
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Returns:
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int: Number of custom fonts loaded
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"""
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if not self.fonts_dir.exists():
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self.logger.info(f"Custom fonts directory {self.fonts_dir} not found - using system fonts")
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return 0
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font_extensions = {'.ttf', '.otf', '.ttc'}
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fonts_loaded = 0
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try:
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for font_file in self.fonts_dir.iterdir():
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if font_file.suffix.lower() in font_extensions:
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try:
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# Load for matplotlib
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fm.fontManager.addfont(str(font_file))
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# Load for Qt
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font_id = QFontDatabase.addApplicationFont(str(font_file))
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if font_id != -1:
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font_families = QFontDatabase.applicationFontFamilies(font_id)
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for family in font_families:
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self.loaded_fonts[family] = str(font_file)
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fonts_loaded += 1
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self.logger.debug(f"Loaded custom font: {font_file.name} -> {font_families}")
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else:
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self.logger.warning(f"Failed to load font for Qt: {font_file.name}")
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except Exception as e:
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self.logger.warning(f"Failed to load custom font {font_file.name}: {e}")
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if fonts_loaded > 0:
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# Clear matplotlib's font cache to recognize new fonts
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fm.fontManager._load_fontmanager(try_read_cache=False)
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except Exception as e:
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self.logger.error(f"Error loading custom fonts: {e}")
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return fonts_loaded
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def _configure_matplotlib(self) -> bool:
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"""Configure matplotlib with appropriate CJK font fallbacks."""
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try:
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current_system = platform.system()
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fallback_fonts = self.system_font_fallbacks.get(current_system,
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self.system_font_fallbacks['Linux'])
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# Build font list: custom fonts + system fallbacks + matplotlib defaults
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font_list = []
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# Add custom fonts first (highest priority)
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font_list.extend(self.loaded_fonts.keys())
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# Add system CJK fonts
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font_list.extend(fallback_fonts['sans-serif'])
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# Add matplotlib defaults as final fallback
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font_list.extend(['DejaVu Sans', 'Arial', 'sans-serif'])
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# Update matplotlib configuration
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plt.rcParams['font.sans-serif'] = font_list
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plt.rcParams['font.family'] = 'sans-serif'
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# Ensure matplotlib can handle Unicode
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plt.rcParams['axes.unicode_minus'] = False
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self.logger.info(f"Matplotlib configured with font list: {font_list[:3]}...")
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self._matplotlib_configured = True
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return True
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except Exception as e:
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self.logger.error(f"Matplotlib font configuration failed: {e}")
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return False
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def _configure_qt(self) -> bool:
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"""Configure Qt application with appropriate CJK fonts."""
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try:
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app = QCoreApplication.instance()
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if not app:
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self.logger.warning("No Qt application instance found - Qt font configuration skipped")
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return True
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# Get best available CJK font
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cjk_font = self._get_best_cjk_font()
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if cjk_font:
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# Set application-wide font
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font = QFont(cjk_font)
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app.setFont(font)
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self.logger.info(f"Qt configured with CJK font: {cjk_font}")
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else:
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self.logger.info("Qt using default system font (no specific CJK font found)")
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self._qt_configured = True
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return True
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except Exception as e:
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self.logger.error(f"Qt font configuration failed: {e}")
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return False
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def _get_best_cjk_font(self) -> Optional[str]:
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"""
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Find the best available CJK font for the current system.
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Returns:
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str or None: Name of best available CJK font
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"""
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# Check custom fonts first
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for font_name in self.loaded_fonts.keys():
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if self._is_cjk_capable(font_name):
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return font_name
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# Check system fonts
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current_system = platform.system()
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system_fonts = self.system_font_fallbacks.get(current_system,
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self.system_font_fallbacks['Linux'])
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available_fonts = set(fm.get_font_names())
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for font_name in system_fonts['sans-serif']:
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if font_name in available_fonts:
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return font_name
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return None
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def _is_cjk_capable(self, font_name: str) -> bool:
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"""
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Check if a font supports CJK characters.
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Simple heuristic based on font name.
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"""
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cjk_indicators = [
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'cjk', 'japanese', 'chinese', 'korean', 'han', 'noto', 'yu',
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'hiragino', 'meiryo', 'gothic', 'mincho', '游', 'メイリオ',
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'ゴシック', '明朝'
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]
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font_lower = font_name.lower()
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return any(indicator in font_lower for indicator in cjk_indicators)
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def get_cjk_safe_title(self, title: str, fallback_encoding: str = 'utf-8') -> str:
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"""
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Ensure title string is safe for display with current font configuration.
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Args:
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title: Original title string
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fallback_encoding: Encoding to use for problematic characters
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Returns:
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str: Safe title string for display
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"""
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if not title:
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return title
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try:
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# Test if the string can be encoded/decoded properly
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title.encode(fallback_encoding).decode(fallback_encoding)
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return title
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except UnicodeError:
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# If there are encoding issues, create a safe fallback
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safe_title = title.encode(fallback_encoding, errors='replace').decode(fallback_encoding)
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self.logger.debug(f"Title encoding adjusted: {title[:50]}... -> {safe_title[:50]}...")
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return safe_title
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def create_fonts_directory_if_needed(self) -> Path:
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"""
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Create the fonts directory and return its path.
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Useful for setup instructions.
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Returns:
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Path: Path to the fonts directory
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"""
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self.fonts_dir.mkdir(exist_ok=True)
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return self.fonts_dir
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def get_font_installation_instructions(self) -> str:
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"""
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Generate user instructions for installing CJK fonts.
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Returns:
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str: Multi-line instruction string
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"""
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fonts_path = self.create_fonts_directory_if_needed()
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instructions = f"""CJK Font Installation Instructions:
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1. Create or use the fonts directory: {fonts_path.absolute()}
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2. Download CJK fonts (legally) from sources like:
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- Google Fonts (Noto Sans CJK, free & open source)
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- Adobe Source Han fonts (free & open source)
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- System fonts from your OS (if redistribution is allowed)
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3. Place .ttf, .otf, or .ttc font files in the fonts/ directory
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4. Restart the application to load the new fonts
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Note: The fonts/ directory is gitignored to avoid licensing issues.
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System CJK fonts will be used as fallback if available.
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Current system: {platform.system()}
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Recommended fonts: {', '.join(self.system_font_fallbacks.get(platform.system(), {}).get('sans-serif', ['System default'])[:3])}
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"""
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return instructions
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def get_status_report(self) -> Dict[str, Any]:
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"""
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Generate a status report of the font system.
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Returns:
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dict: Status information
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"""
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return {
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'matplotlib_configured': self._matplotlib_configured,
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'qt_configured': self._qt_configured,
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'custom_fonts_loaded': len(self.loaded_fonts),
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'custom_font_families': list(self.loaded_fonts.keys()),
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'fonts_directory_exists': self.fonts_dir.exists(),
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'fonts_directory_path': str(self.fonts_dir.absolute()),
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'current_matplotlib_fonts': plt.rcParams.get('font.sans-serif', [])[:5],
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'current_system': platform.system()
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}
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# Global font manager instance
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_font_manager: Optional[FontManager] = None
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def get_font_manager() -> FontManager:
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"""
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Get the global font manager instance.
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Creates one if it doesn't exist.
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Returns:
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FontManager: Global font manager instance
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"""
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global _font_manager
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if _font_manager is None:
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_font_manager = FontManager()
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return _font_manager
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def initialize_fonts() -> bool:
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"""
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Initialize the global font system.
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Call this early in application startup.
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Returns:
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bool: True if successful
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"""
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return get_font_manager().initialize()
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def safe_title(title: str) -> str:
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"""
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Convenience function to get CJK-safe title.
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Args:
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title: Original title
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Returns:
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str: Safe title for display
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"""
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return get_font_manager().get_cjk_safe_title(title) |