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"""
Adaptor for building prompt_toolkit styles, starting from a Pygments style.
Usage::
from pygments.styles.tango import TangoStyle
style = style_from_pygments_cls(pygments_style_cls=TangoStyle)
"""
from __future__ import annotations
from typing import TYPE_CHECKING
from .style import Style
if TYPE_CHECKING:
from pygments.style import Style as PygmentsStyle
from pygments.token import Token
__all__ = [
"style_from_pygments_cls",
"style_from_pygments_dict",
"pygments_token_to_classname",
]
def style_from_pygments_cls(pygments_style_cls: type[PygmentsStyle]) -> Style:
"""
Shortcut to create a :class:`.Style` instance from a Pygments style class
and a style dictionary.
Example::
from prompt_toolkit.styles.from_pygments import style_from_pygments_cls
from pygments.styles import get_style_by_name
style = style_from_pygments_cls(get_style_by_name('monokai'))
:param pygments_style_cls: Pygments style class to start from.
"""
# Import inline.
from pygments.style import Style as PygmentsStyle
assert issubclass(pygments_style_cls, PygmentsStyle)
return style_from_pygments_dict(pygments_style_cls.styles)
def style_from_pygments_dict(pygments_dict: dict[Token, str]) -> Style:
"""
Create a :class:`.Style` instance from a Pygments style dictionary.
(One that maps Token objects to style strings.)
"""
pygments_style = []
for token, style in pygments_dict.items():
pygments_style.append((pygments_token_to_classname(token), style))
return Style(pygments_style)
def pygments_token_to_classname(token: Token) -> str:
"""
Turn e.g. `Token.Name.Exception` into `'pygments.name.exception'`.
(Our Pygments lexer will also turn the tokens that pygments produces in a
prompt_toolkit list of fragments that match these styling rules.)
"""
parts = ("pygments",) + token
return ".".join(parts).lower()
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