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| from __future__ import annotations | |
| import json | |
| from typing import Iterable | |
| class FontEncoder(json.JSONEncoder): | |
| def default(self, obj): | |
| if isinstance(obj, Font): | |
| return { | |
| "__gradio_font__": True, | |
| "name": obj.name, | |
| "class": "google" if isinstance(obj, GoogleFont) else "font", | |
| } | |
| # Let the base class default method raise the TypeError | |
| return json.JSONEncoder.default(self, obj) | |
| def as_font(dct): | |
| if "__gradio_font__" in dct: | |
| name = dct["name"] | |
| return GoogleFont(name) if dct["class"] == "google" else Font(name) | |
| return dct | |
| class Font: | |
| def __init__(self, name: str): | |
| self.name = name | |
| def __str__(self) -> str: | |
| return ( | |
| self.name | |
| if self.name in ["sans-serif", "serif", "monospace", "cursive", "fantasy"] | |
| else f"'{self.name}'" | |
| ) | |
| def stylesheet(self) -> str: | |
| return None | |
| def __eq__(self, other: Font) -> bool: | |
| return self.name == other.name and self.stylesheet() == other.stylesheet() | |
| def __repr__(self) -> str: | |
| klass = type(self) | |
| class_repr = klass.__module__ + "." + klass.__qualname__ | |
| attrs = ", ".join([k + "=" + repr(v) for k, v in self.__dict__.items()]) | |
| return f"<{class_repr} ({attrs})>" | |
| class GoogleFont(Font): | |
| def __init__(self, name: str, weights: Iterable[int] = (400, 600)): | |
| self.name = name | |
| self.weights = weights | |
| def stylesheet(self) -> str: | |
| return f'https://fonts.googleapis.com/css2?family={self.name.replace(" ", "+")}:wght@{";".join(str(weight) for weight in self.weights)}&display=swap' | |