Source code for bokeh.core.property.string

#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2021, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
""" Provide the Regex property.



"""

#-----------------------------------------------------------------------------
# Boilerplate
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from __future__ import annotations

import logging # isort:skip
log = logging.getLogger(__name__)

#-----------------------------------------------------------------------------
# Imports
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# Standard library imports
import base64
import re

# Bokeh imports
from .primitive import String
from .singletons import Undefined

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# Globals and constants
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__all__ = (
    'Regex',
    'MathString',
    'Base64String',
)

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# General API
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[docs]class Regex(String): """ Accept strings that match a given regular expression. Args: default (string, optional) : A default value for attributes created from this property to have. help (str or None, optional) : A documentation string for this property. It will be automatically used by the :ref:`bokeh.sphinxext.bokeh_prop` extension when generating Spinx documentation. (default: None) serialized (bool, optional) : Whether attributes created from this property should be included in serialization (default: True) readonly (bool, optional) : Whether attributes created from this property are read-only. (default: False) Example: .. code-block:: python >>> class RegexModel(HasProps): ... prop = Regex("foo[0-9]+bar") ... >>> m = RegexModel() >>> m.prop = "foo123bar" >>> m.prop = "foo" # ValueError !! >>> m.prop = [1, 2, 3] # ValueError !! """ def __init__(self, regex, default=Undefined, help=None) -> None: self.regex = re.compile(regex) super().__init__(default=default, help=help) def __str__(self) -> str: class_name = self.__class__.__name__ return f"{class_name}({self.regex.pattern!r})" def validate(self, value, detail=True): super().validate(value, detail) if self.regex.match(value): return msg = "" if not detail else f"expected a string matching {self.regex.pattern!r} pattern, got {value!r}" raise ValueError(msg)
class Base64String(String): def serialize_value(self, value): """ Encode a ascii string using Base64. Args: value : a string to encode Returns: string """ if isinstance(value, str): value = base64.b64encode(value.encode("utf-8")).decode("utf-8") return value class MathString(String): """ A string with math TeX/LaTeX delimiters. Args: value : a string that contains math """ #----------------------------------------------------------------------------- # Dev API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------