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- import pathlib as pl
- from matplotlib import font_manager
- from view.python_core.get_internal_files import get_internal_fonts_dir
- from PIL import ImageFont
- def resolve_font_file(mv_fontName):
- """
- Find a font file on the file system, if not found, use internal default
- Hierarchy for file look up: (1) system ttf font with name mv_fontName, (2) system otf font with name mv_fontName,
- (3) internal ttf font with name mv_fontName (4) internal otf font with name mv_fontName, fallback internal font
- :param str mv_fontName: name of the font, will look for <mv_fontname>.ttf or <mv_fontname>.otf
- :rtype: str
- :returns: absolute filename of the font file
- """
- font_file_lookup_hierarchy = [find_font_file_in_OS(font_name=mv_fontName, ext=".ttf"),
- find_font_file_in_OS(font_name=mv_fontName, ext=".otf"),
- find_font_file_in_dir(font_name=mv_fontName, where=get_internal_fonts_dir(),
- ext=".ttf"),
- find_font_file_in_dir(font_name=mv_fontName, where=get_internal_fonts_dir(),
- ext=".otf"),
- find_font_file_in_dir(font_name="PixelOperator8", where=get_internal_fonts_dir(),
- ext=".ttf")]
- existences = [x is not None for x in font_file_lookup_hierarchy]
- font2use = font_file_lookup_hierarchy[existences.index(True)]
- return font2use
- def get_maximum_font_size_by_width(font_name, text, maximum_width):
- font = ImageFont.truetype(font=font_name, size=10)
- w, h = font.getsize(text)
- return int(10 * maximum_width / w)
- def resolve_font_size(suggested_font_size, maximum_width, text, font_name):
- max_font_size = get_maximum_font_size_by_width(font_name=font_name, text=text,
- maximum_width=maximum_width)
- max_font_size_with_margin = int(0.95 * max_font_size)
- return max(min(max_font_size_with_margin, suggested_font_size), 8)
- def find_font_file_in_dir(font_name, where=None, ext=".ttf"):
- font_files = font_manager.findSystemFonts(fontpaths=where)
- matches = [pl.Path(f).name.lower() == f"{font_name}{ext}".lower() for f in font_files]
- if any(matches):
- return font_files[matches.index(True)]
- else:
- return None
- def find_font_file_in_OS(font_name, ext=".ttf"):
- return find_font_file_in_dir(font_name, ext=ext)
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