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| from __future__ import annotations | |
| import base64 | |
| from io import BytesIO | |
| from dataclasses import dataclass | |
| from functools import lru_cache | |
| from importlib.resources import files | |
| from pathlib import Path | |
| class FontFace: | |
| family: str | |
| weight: int | |
| italic: bool | |
| filename: str | |
| def path(self) -> Path: | |
| return Path(str(files("editable_image").joinpath("fonts", self.filename))) | |
| FACES = ( | |
| FontFace("Lato", 400, False, "Lato-Regular.ttf"), | |
| FontFace("Lato", 400, True, "Lato-Italic.ttf"), | |
| FontFace("Lato", 700, False, "Lato-Bold.ttf"), | |
| FontFace("Lato", 700, True, "Lato-BoldItalic.ttf"), | |
| FontFace("Liberation Sans", 400, False, "LiberationSans-Regular.ttf"), | |
| FontFace("Liberation Sans", 400, True, "LiberationSans-Italic.ttf"), | |
| FontFace("Liberation Sans", 700, False, "LiberationSans-Bold.ttf"), | |
| FontFace("Liberation Sans", 700, True, "LiberationSans-BoldItalic.ttf"), | |
| FontFace("Liberation Serif", 400, False, "LiberationSerif-Regular.ttf"), | |
| FontFace("Liberation Serif", 400, True, "LiberationSerif-Italic.ttf"), | |
| FontFace("Liberation Serif", 700, False, "LiberationSerif-Bold.ttf"), | |
| FontFace("Liberation Serif", 700, True, "LiberationSerif-BoldItalic.ttf"), | |
| FontFace("Liberation Mono", 400, False, "LiberationMono-Regular.ttf"), | |
| FontFace("Liberation Mono", 400, True, "LiberationMono-Italic.ttf"), | |
| FontFace("Liberation Mono", 700, False, "LiberationMono-Bold.ttf"), | |
| FontFace("Liberation Mono", 700, True, "LiberationMono-BoldItalic.ttf"), | |
| ) | |
| def families() -> list[str]: | |
| return list(dict.fromkeys(face.family for face in FACES if face.path.exists())) | |
| def get_face(family: str, weight: int, italic: bool) -> FontFace: | |
| candidates = [face for face in FACES if face.family == family and face.path.exists()] | |
| if not candidates: | |
| candidates = [face for face in FACES if face.path.exists()] | |
| if not candidates: | |
| raise FileNotFoundError("No bundled fonts are installed") | |
| return min( | |
| candidates, | |
| key=lambda face: abs(face.weight - weight) + (1000 if face.italic != italic else 0), | |
| ) | |
| def font_data_uri(filename: str) -> str: | |
| path = Path(str(files("editable_image").joinpath("fonts", filename))) | |
| from fontTools.ttLib import TTFont | |
| font = TTFont(path) | |
| font.flavor = "woff2" | |
| output = BytesIO() | |
| font.save(output) | |
| data = base64.b64encode(output.getvalue()).decode("ascii") | |
| return f"data:font/woff2;base64,{data}" | |