Source code for ufoLib2.objects.image

from import Mapping
from typing import Any, Iterator, Optional, Tuple

from attr import define, field
from fontTools.misc.transform import Identity, Transform

from .misc import _convert_transform

[docs]@define class Image(Mapping): """Represents a background image reference. See and """ fileName: Optional[str] = None """The filename of the image.""" transformation: Transform = field(default=Identity, converter=_convert_transform) """The affine transformation applied to the image.""" color: Optional[str] = None """The color applied to the image."""
[docs] def clear(self) -> None: """Resets the image reference to factory settings.""" self.fileName = None self.transformation = Identity self.color = None
def __bool__(self) -> bool: """Indicates whether fileName is set.""" return self.fileName is not None # implementation of abstract methods. # the fontTools.ufoLib.validators.imageValidator requires that image is a # subclass of Mapping... _transformation_keys_: Tuple[str, str, str, str, str, str] = ( "xScale", "xyScale", "yxScale", "yScale", "xOffset", "yOffset", ) _valid_keys_: Tuple[str, str, str, str, str, str, str, str] = ( "fileName", *_transformation_keys_, "color", ) def __getitem__(self, key: str) -> Any: try: i = self._transformation_keys_.index(key) except ValueError: try: return getattr(self, key) except AttributeError: raise KeyError(key) else: return self.transformation[i] def __len__(self) -> int: return len(self._valid_keys_) def __iter__(self) -> Iterator[str]: return iter(self._valid_keys_)