def test_lazy_module_single_instance(module):
"""Ensure we only create a single instance per module name."""
module_second_import = lazy.import_module(MODULE_NAME)
assert module_second_import is module
def module():
"""Fixture to return a lazy imported module."""
yield lazy.import_module(MODULE_NAME)
"""Utility functions and classes for exif handling.
All exif related tasks are implemented in this module. The heavy lifting is done using
one of the supported exif libraries, i.e.
* piexif (https://pypi.org/project/piexif/) and
* pyexiv2 (https://pypi.org/project/py3exiv2/).
"""
import contextlib
import itertools
from typing import Any, Dict, Tuple, NoReturn, Sequence, Iterable
from vimiv.utils import log, lazy, is_hex
pyexiv2 = lazy.import_module("pyexiv2", optional=True)
piexif = lazy.import_module("piexif", optional=True)
_logger = log.module_logger(__name__)
ExifDictT = Dict[Any, Tuple[str, str]]
class UnsupportedExifOperation(NotImplementedError):
"""Raised if an exif operation is not supported by the used library if any."""
class _ExifHandlerBase:
"""Handler to load and copy exif information of a single image.
This class provides the interface for handling exif support. By default none of the
operations are implemented. Instead it is up to a child class which wraps around one
QGraphicsScene,
QFrame,
QGraphicsItem,
QGraphicsPixmapItem,
QLabel,
)
from PyQt5.QtGui import QMovie, QPixmap
from vimiv import api, imutils, utils
from vimiv.imutils import slideshow
from vimiv.commands.argtypes import Direction, ImageScale, ImageScaleFloat, Zoom
from vimiv.config import styles
from vimiv.gui import eventhandler
from vimiv.utils import lazy
QtSvg = lazy.import_module("PyQt5.QtSvg", optional=True)
INF = float("inf")
class ScrollableImage(eventhandler.EventHandlerMixin, QGraphicsView):
"""QGraphicsView to display Image or Animation.
Connects to the *_loaded signals to create the appropriate child widget.
Commands used in image mode are defined here.
Class Attributes:
MIN_SCALE: Minimum scale to scale an image to.
MAX_SCALE: Maximum scale to scale an image to.
Attributes:
# This file is part of vimiv.
# Copyright 2017-2020 Christian Karl (karlch) <karlch at protonmail dot com>
# License: GNU GPL v3, see the "LICENSE" and "AUTHORS" files for details.
"""Utility functions and classes for exif handling.
All exif related tasks are implemented in this module. The heavy lifting is done using
piexif (https://github.com/hMatoba/Piexif).
"""
import contextlib
from vimiv.utils import log, lazy
from vimiv import api
piexif = lazy.import_module("piexif", optional=True)
_logger = log.module_logger(__name__)
def check_piexif(return_value=None):
"""Decorator for functions that require the optional piexif module.
If piexif is not available, return_value is returned and a debug log message is
logged. It it is available, the function is called as usual.
Args:
return_value: Value to return if piexif is not available.
"""
def decorator(func):