mirror of
https://github.com/janeczku/calibre-web
synced 2024-12-11 10:40:32 +00:00
49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
|
from threading import local
|
||
|
|
|
||
|
|
|
||
|
|
_local = local()
|
||
|
|
|
||
|
|
|
||
|
|
def get_current_context(silent=False):
|
||
|
|
"""Returns the current click context. This can be used as a way to
|
||
|
|
access the current context object from anywhere. This is a more implicit
|
||
|
|
alternative to the :func:`pass_context` decorator. This function is
|
||
|
|
primarily useful for helpers such as :func:`echo` which might be
|
||
|
|
interested in changing it's behavior based on the current context.
|
||
|
|
|
||
|
|
To push the current context, :meth:`Context.scope` can be used.
|
||
|
|
|
||
|
|
.. versionadded:: 5.0
|
||
|
|
|
||
|
|
:param silent: is set to `True` the return value is `None` if no context
|
||
|
|
is available. The default behavior is to raise a
|
||
|
|
:exc:`RuntimeError`.
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
return getattr(_local, 'stack')[-1]
|
||
|
|
except (AttributeError, IndexError):
|
||
|
|
if not silent:
|
||
|
|
raise RuntimeError('There is no active click context.')
|
||
|
|
|
||
|
|
|
||
|
|
def push_context(ctx):
|
||
|
|
"""Pushes a new context to the current stack."""
|
||
|
|
_local.__dict__.setdefault('stack', []).append(ctx)
|
||
|
|
|
||
|
|
|
||
|
|
def pop_context():
|
||
|
|
"""Removes the top level from the stack."""
|
||
|
|
_local.stack.pop()
|
||
|
|
|
||
|
|
|
||
|
|
def resolve_color_default(color=None):
|
||
|
|
""""Internal helper to get the default value of the color flag. If a
|
||
|
|
value is passed it's returned unchanged, otherwise it's looked up from
|
||
|
|
the current context.
|
||
|
|
"""
|
||
|
|
if color is not None:
|
||
|
|
return color
|
||
|
|
ctx = get_current_context(silent=True)
|
||
|
|
if ctx is not None:
|
||
|
|
return ctx.color
|