233 lines
9.4 KiB
Python
233 lines
9.4 KiB
Python
import re
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from abc import ABC, abstractmethod
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from typing import List, Union
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from .text import Span, Text
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def _combine_regex(*regexes: str) -> str:
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"""Combine a number of regexes in to a single regex.
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Returns:
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str: New regex with all regexes ORed together.
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"""
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return "|".join(regexes)
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class Highlighter(ABC):
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"""Abstract base class for highlighters."""
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def __call__(self, text: Union[str, Text]) -> Text:
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"""Highlight a str or Text instance.
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Args:
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text (Union[str, ~Text]): Text to highlight.
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Raises:
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TypeError: If not called with text or str.
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Returns:
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Text: A test instance with highlighting applied.
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"""
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if isinstance(text, str):
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highlight_text = Text(text)
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elif isinstance(text, Text):
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highlight_text = text.copy()
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else:
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raise TypeError(f"str or Text instance required, not {text!r}")
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self.highlight(highlight_text)
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return highlight_text
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@abstractmethod
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def highlight(self, text: Text) -> None:
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"""Apply highlighting in place to text.
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Args:
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text (~Text): A text object highlight.
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"""
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class NullHighlighter(Highlighter):
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"""A highlighter object that doesn't highlight.
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May be used to disable highlighting entirely.
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"""
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def highlight(self, text: Text) -> None:
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"""Nothing to do"""
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class RegexHighlighter(Highlighter):
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"""Applies highlighting from a list of regular expressions."""
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highlights: List[str] = []
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base_style: str = ""
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def highlight(self, text: Text) -> None:
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"""Highlight :class:`rich.text.Text` using regular expressions.
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Args:
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text (~Text): Text to highlighted.
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"""
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highlight_regex = text.highlight_regex
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for re_highlight in self.highlights:
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highlight_regex(re_highlight, style_prefix=self.base_style)
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class ReprHighlighter(RegexHighlighter):
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"""Highlights the text typically produced from ``__repr__`` methods."""
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base_style = "repr."
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highlights = [
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r"(?P<tag_start><)(?P<tag_name>[-\w.:|]*)(?P<tag_contents>[\w\W]*?)(?P<tag_end>>)",
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r'(?P<attrib_name>[\w_]{1,50})=(?P<attrib_value>"?[\w_]+"?)?',
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r"(?P<brace>[][{}()])",
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_combine_regex(
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r"(?P<ipv4>[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})",
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r"(?P<ipv6>([A-Fa-f0-9]{1,4}::?){1,7}[A-Fa-f0-9]{1,4})",
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r"(?P<eui64>(?:[0-9A-Fa-f]{1,2}-){7}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{1,2}:){7}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{4}\.){3}[0-9A-Fa-f]{4})",
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r"(?P<eui48>(?:[0-9A-Fa-f]{1,2}-){5}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{1,2}:){5}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{4}\.){2}[0-9A-Fa-f]{4})",
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r"(?P<uuid>[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12})",
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r"(?P<call>[\w.]*?)\(",
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r"\b(?P<bool_true>True)\b|\b(?P<bool_false>False)\b|\b(?P<none>None)\b",
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r"(?P<ellipsis>\.\.\.)",
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r"(?P<number_complex>(?<!\w)(?:\-?[0-9]+\.?[0-9]*(?:e[-+]?\d+?)?)(?:[-+](?:[0-9]+\.?[0-9]*(?:e[-+]?\d+)?))?j)",
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r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[-+]?\d+?)?\b|0x[0-9a-fA-F]*)",
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r"(?P<path>\B(/[-\w._+]+)*\/)(?P<filename>[-\w._+]*)?",
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r"(?<![\\\w])(?P<str>b?'''.*?(?<!\\)'''|b?'.*?(?<!\\)'|b?\"\"\".*?(?<!\\)\"\"\"|b?\".*?(?<!\\)\")",
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r"(?P<url>(file|https|http|ws|wss)://[-0-9a-zA-Z$_+!`(),.?/;:&=%#]*)",
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),
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]
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class JSONHighlighter(RegexHighlighter):
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"""Highlights JSON"""
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# Captures the start and end of JSON strings, handling escaped quotes
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JSON_STR = r"(?<![\\\w])(?P<str>b?\".*?(?<!\\)\")"
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JSON_WHITESPACE = {" ", "\n", "\r", "\t"}
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base_style = "json."
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highlights = [
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_combine_regex(
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r"(?P<brace>[\{\[\(\)\]\}])",
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r"\b(?P<bool_true>true)\b|\b(?P<bool_false>false)\b|\b(?P<null>null)\b",
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r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[\-\+]?\d+?)?\b|0x[0-9a-fA-F]*)",
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JSON_STR,
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),
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]
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def highlight(self, text: Text) -> None:
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super().highlight(text)
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# Additional work to handle highlighting JSON keys
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plain = text.plain
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append = text.spans.append
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whitespace = self.JSON_WHITESPACE
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for match in re.finditer(self.JSON_STR, plain):
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start, end = match.span()
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cursor = end
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while cursor < len(plain):
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char = plain[cursor]
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cursor += 1
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if char == ":":
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append(Span(start, end, "json.key"))
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elif char in whitespace:
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continue
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break
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class ISO8601Highlighter(RegexHighlighter):
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"""Highlights the ISO8601 date time strings.
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Regex reference: https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch04s07.html
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"""
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base_style = "iso8601."
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highlights = [
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#
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# Dates
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#
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# Calendar month (e.g. 2008-08). The hyphen is required
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r"^(?P<year>[0-9]{4})-(?P<month>1[0-2]|0[1-9])$",
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# Calendar date w/o hyphens (e.g. 20080830)
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r"^(?P<date>(?P<year>[0-9]{4})(?P<month>1[0-2]|0[1-9])(?P<day>3[01]|0[1-9]|[12][0-9]))$",
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# Ordinal date (e.g. 2008-243). The hyphen is optional
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r"^(?P<date>(?P<year>[0-9]{4})-?(?P<day>36[0-6]|3[0-5][0-9]|[12][0-9]{2}|0[1-9][0-9]|00[1-9]))$",
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#
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# Weeks
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#
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# Week of the year (e.g., 2008-W35). The hyphen is optional
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r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9]))$",
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# Week date (e.g., 2008-W35-6). The hyphens are optional
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r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9])-?(?P<day>[1-7]))$",
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#
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# Times
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#
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# Hours and minutes (e.g., 17:21). The colon is optional
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r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):?(?P<minute>[0-5][0-9]))$",
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# Hours, minutes, and seconds w/o colons (e.g., 172159)
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r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))$",
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# Time zone designator (e.g., Z, +07 or +07:00). The colons and the minutes are optional
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r"^(?P<timezone>(Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?))$",
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# Hours, minutes, and seconds with time zone designator (e.g., 17:21:59+07:00).
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# All the colons are optional. The minutes in the time zone designator are also optional
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r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?)$",
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#
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# Date and Time
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#
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# Calendar date with hours, minutes, and seconds (e.g., 2008-08-30 17:21:59 or 20080830 172159).
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# A space is required between the date and the time. The hyphens and colons are optional.
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# This regex matches dates and times that specify some hyphens or colons but omit others.
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# This does not follow ISO 8601
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r"^(?P<date>(?P<year>[0-9]{4})(?P<hyphen>-)?(?P<month>1[0-2]|0[1-9])(?(hyphen)-)(?P<day>3[01]|0[1-9]|[12][0-9])) (?P<time>(?P<hour>2[0-3]|[01][0-9])(?(hyphen):)(?P<minute>[0-5][0-9])(?(hyphen):)(?P<second>[0-5][0-9]))$",
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#
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# XML Schema dates and times
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#
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# Date, with optional time zone (e.g., 2008-08-30 or 2008-08-30+07:00).
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# Hyphens are required. This is the XML Schema 'date' type
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r"^(?P<date>(?P<year>-?(?:[1-9][0-9]*)?[0-9]{4})-(?P<month>1[0-2]|0[1-9])-(?P<day>3[01]|0[1-9]|[12][0-9]))(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
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# Time, with optional fractional seconds and time zone (e.g., 01:45:36 or 01:45:36.123+07:00).
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# There is no limit on the number of digits for the fractional seconds. This is the XML Schema 'time' type
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r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<frac>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
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# Date and time, with optional fractional seconds and time zone (e.g., 2008-08-30T01:45:36 or 2008-08-30T01:45:36.123Z).
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# This is the XML Schema 'dateTime' type
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r"^(?P<date>(?P<year>-?(?:[1-9][0-9]*)?[0-9]{4})-(?P<month>1[0-2]|0[1-9])-(?P<day>3[01]|0[1-9]|[12][0-9]))T(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<ms>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
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]
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if __name__ == "__main__": # pragma: no cover
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from .console import Console
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console = Console()
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console.print("[bold green]hello world![/bold green]")
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console.print("'[bold green]hello world![/bold green]'")
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console.print(" /foo")
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console.print("/foo/")
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console.print("/foo/bar")
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console.print("foo/bar/baz")
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console.print("/foo/bar/baz?foo=bar+egg&egg=baz")
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console.print("/foo/bar/baz/")
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console.print("/foo/bar/baz/egg")
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console.print("/foo/bar/baz/egg.py")
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console.print("/foo/bar/baz/egg.py word")
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console.print(" /foo/bar/baz/egg.py word")
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console.print("foo /foo/bar/baz/egg.py word")
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console.print("foo /foo/bar/ba._++z/egg+.py word")
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console.print("https://example.org?foo=bar#header")
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console.print(1234567.34)
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console.print(1 / 2)
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console.print(-1 / 123123123123)
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console.print(
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"127.0.1.1 bar 192.168.1.4 2001:0db8:85a3:0000:0000:8a2e:0370:7334 foo"
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)
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import json
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console.print_json(json.dumps(obj={"name": "apple", "count": 1}), indent=None)
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