from typing import Optional
from validator_collection import validators
from highcharts_core.metaclasses import HighchartsMeta
[docs]class PDFFontOptions(HighchartsMeta):
"""Settings for a custom font for the exported PDF, when using the
``offline-exporting`` module.
This is used for languages containing non-ASCII characters, like Chinese, Russian,
Japanese etc.
As described in the
`jsPDF docs <https://github.com/parallax/jsPDF#use-of-unicode-characters--utf-8>`_,
the 14 standard fonts in PDF are limited to the ASCII-codepage. Therefore, in
order to support other text in the exported PDF, one or more TTF font files have
to be passed on to the exporting module.
"""
def __init__(self, **kwargs):
self._bold = None
self._bolditalic = None
self._italic = None
self._normal = None
self.bold = kwargs.get('bold', None)
self.bolditalic = kwargs.get('bolditalic', None)
self.italic = kwargs.get('italic', None)
self.normal = kwargs.get('normal', None)
@property
def bold(self) -> Optional[str]:
"""The TTF font file for bold text. Defaults to :obj:`None <python:None>`.
:rtype: :class:`str <python:str>` or :obj:`None <python:None>`
:raises ValueError: if not a URL or path-like string
"""
return self._bold
@bold.setter
def bold(self, value):
try:
self._bold = validators.url(value, allow_empty = True)
except ValueError:
self._bold = validators.path(value, allow_empty = True)
@property
def bolditalic(self) -> Optional[str]:
"""The TTF font file for Bold Italic text. Defaults to
:obj:`None <python:None>`.
:rtype: :class:`str <python:str>` or :obj:`None <python:None>`
:raises ValueError: if not a URL or path-like string
"""
return self._bolditalic
@bolditalic.setter
def bolditalic(self, value):
try:
self._bolditalic = validators.url(value, allow_empty = True)
except ValueError:
self._bolditalic = validators.path(value, allow_empty = True)
@property
def italic(self) -> Optional[str]:
"""The TTF font file for italic text. Defaults to :obj:`None <python:None>`.
:rtype: :class:`str <python:str>` or :obj:`None <python:None>`
:raises ValueError: if not a URL or path-like string
"""
return self._italic
@italic.setter
def italic(self, value):
try:
self._italic = validators.url(value, allow_empty = True)
except ValueError:
self._italic = validators.path(value, allow_empty = True)
@property
def normal(self) -> Optional[str]:
"""The TTF font file for normal ``font-style``. Defaults to
:obj:`None <python:None>`.
.. note::
If font variations like bold or italic are not defined, the normal font
will be used for those, too.
:rtype: :class:`str <python:str>` or :obj:`None <python:None>`
:raises ValueError: if not a URL or path-like string
"""
return self._normal
@normal.setter
def normal(self, value):
try:
self._normal = validators.url(value, allow_empty = True)
except ValueError:
self._normal = validators.path(value, allow_empty = True)
@classmethod
def _get_kwargs_from_dict(cls, as_dict):
kwargs = {
'bold': as_dict.get('bold', None),
'bolditalic': as_dict.get('bolditalic', None),
'italic': as_dict.get('italic', None),
'normal': as_dict.get('normal', None)
}
return kwargs
def _to_untrimmed_dict(self, in_cls = None) -> dict:
untrimmed = {
'bold': self.bold,
'bolditalic': self.bolditalic,
'italic': self.italic,
'normal': self.normal
}
return untrimmed