highlighter.pyā¢9.59 kB
import re
from abc import ABC, abstractmethod
from typing import List, Union
from .text import Span, Text
def _combine_regex(*regexes: str) -> str:
"""Combine a number of regexes in to a single regex.
Returns:
str: New regex with all regexes ORed together.
"""
return "|".join(regexes)
class Highlighter(ABC):
"""Abstract base class for highlighters."""
def __call__(self, text: Union[str, Text]) -> Text:
"""Highlight a str or Text instance.
Args:
text (Union[str, ~Text]): Text to highlight.
Raises:
TypeError: If not called with text or str.
Returns:
Text: A test instance with highlighting applied.
"""
if isinstance(text, str):
highlight_text = Text(text)
elif isinstance(text, Text):
highlight_text = text.copy()
else:
raise TypeError(f"str or Text instance required, not {text!r}")
self.highlight(highlight_text)
return highlight_text
@abstractmethod
def highlight(self, text: Text) -> None:
"""Apply highlighting in place to text.
Args:
text (~Text): A text object highlight.
"""
class NullHighlighter(Highlighter):
"""A highlighter object that doesn't highlight.
May be used to disable highlighting entirely.
"""
def highlight(self, text: Text) -> None:
"""Nothing to do"""
class RegexHighlighter(Highlighter):
"""Applies highlighting from a list of regular expressions."""
highlights: List[str] = []
base_style: str = ""
def highlight(self, text: Text) -> None:
"""Highlight :class:`rich.text.Text` using regular expressions.
Args:
text (~Text): Text to highlighted.
"""
highlight_regex = text.highlight_regex
for re_highlight in self.highlights:
highlight_regex(re_highlight, style_prefix=self.base_style)
class ReprHighlighter(RegexHighlighter):
"""Highlights the text typically produced from ``__repr__`` methods."""
base_style = "repr."
highlights = [
r"(?P<tag_start><)(?P<tag_name>[-\w.:|]*)(?P<tag_contents>[\w\W]*)(?P<tag_end>>)",
r'(?P<attrib_name>[\w_]{1,50})=(?P<attrib_value>"?[\w_]+"?)?',
r"(?P<brace>[][{}()])",
_combine_regex(
r"(?P<ipv4>[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})",
r"(?P<ipv6>([A-Fa-f0-9]{1,4}::?){1,7}[A-Fa-f0-9]{1,4})",
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})",
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})",
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})",
r"(?P<call>[\w.]*?)\(",
r"\b(?P<bool_true>True)\b|\b(?P<bool_false>False)\b|\b(?P<none>None)\b",
r"(?P<ellipsis>\.\.\.)",
r"(?P<number_complex>(?<!\w)(?:\-?[0-9]+\.?[0-9]*(?:e[-+]?\d+?)?)(?:[-+](?:[0-9]+\.?[0-9]*(?:e[-+]?\d+)?))?j)",
r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[-+]?\d+?)?\b|0x[0-9a-fA-F]*)",
r"(?P<path>\B(/[-\w._+]+)*\/)(?P<filename>[-\w._+]*)?",
r"(?<![\\\w])(?P<str>b?'''.*?(?<!\\)'''|b?'.*?(?<!\\)'|b?\"\"\".*?(?<!\\)\"\"\"|b?\".*?(?<!\\)\")",
r"(?P<url>(file|https|http|ws|wss)://[-0-9a-zA-Z$_+!`(),.?/;:&=%#~@]*)",
),
]
class JSONHighlighter(RegexHighlighter):
"""Highlights JSON"""
# Captures the start and end of JSON strings, handling escaped quotes
JSON_STR = r"(?<![\\\w])(?P<str>b?\".*?(?<!\\)\")"
JSON_WHITESPACE = {" ", "\n", "\r", "\t"}
base_style = "json."
highlights = [
_combine_regex(
r"(?P<brace>[\{\[\(\)\]\}])",
r"\b(?P<bool_true>true)\b|\b(?P<bool_false>false)\b|\b(?P<null>null)\b",
r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[\-\+]?\d+?)?\b|0x[0-9a-fA-F]*)",
JSON_STR,
),
]
def highlight(self, text: Text) -> None:
super().highlight(text)
# Additional work to handle highlighting JSON keys
plain = text.plain
append = text.spans.append
whitespace = self.JSON_WHITESPACE
for match in re.finditer(self.JSON_STR, plain):
start, end = match.span()
cursor = end
while cursor < len(plain):
char = plain[cursor]
cursor += 1
if char == ":":
append(Span(start, end, "json.key"))
elif char in whitespace:
continue
break
class ISO8601Highlighter(RegexHighlighter):
"""Highlights the ISO8601 date time strings.
Regex reference: https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch04s07.html
"""
base_style = "iso8601."
highlights = [
#
# Dates
#
# Calendar month (e.g. 2008-08). The hyphen is required
r"^(?P<year>[0-9]{4})-(?P<month>1[0-2]|0[1-9])$",
# Calendar date w/o hyphens (e.g. 20080830)
r"^(?P<date>(?P<year>[0-9]{4})(?P<month>1[0-2]|0[1-9])(?P<day>3[01]|0[1-9]|[12][0-9]))$",
# Ordinal date (e.g. 2008-243). The hyphen is optional
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]))$",
#
# Weeks
#
# Week of the year (e.g., 2008-W35). The hyphen is optional
r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9]))$",
# Week date (e.g., 2008-W35-6). The hyphens are optional
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]))$",
#
# Times
#
# Hours and minutes (e.g., 17:21). The colon is optional
r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):?(?P<minute>[0-5][0-9]))$",
# Hours, minutes, and seconds w/o colons (e.g., 172159)
r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))$",
# Time zone designator (e.g., Z, +07 or +07:00). The colons and the minutes are optional
r"^(?P<timezone>(Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?))$",
# Hours, minutes, and seconds with time zone designator (e.g., 17:21:59+07:00).
# All the colons are optional. The minutes in the time zone designator are also optional
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]))?)$",
#
# Date and Time
#
# Calendar date with hours, minutes, and seconds (e.g., 2008-08-30 17:21:59 or 20080830 172159).
# A space is required between the date and the time. The hyphens and colons are optional.
# This regex matches dates and times that specify some hyphens or colons but omit others.
# This does not follow ISO 8601
r"^(?P<date>(?P<year>[0-9]{4})(?P<hyphen>-)?(?P<month>1[0-2]|0[1-9])(?(hyphen)-)(?P<day>3[01]|0[1-9]|[12][0-9])) (?P<time>(?P<hour>2[0-3]|[01][0-9])(?(hyphen):)(?P<minute>[0-5][0-9])(?(hyphen):)(?P<second>[0-5][0-9]))$",
#
# XML Schema dates and times
#
# Date, with optional time zone (e.g., 2008-08-30 or 2008-08-30+07:00).
# Hyphens are required. This is the XML Schema 'date' type
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])?$",
# Time, with optional fractional seconds and time zone (e.g., 01:45:36 or 01:45:36.123+07:00).
# There is no limit on the number of digits for the fractional seconds. This is the XML Schema 'time' type
r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<frac>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
# Date and time, with optional fractional seconds and time zone (e.g., 2008-08-30T01:45:36 or 2008-08-30T01:45:36.123Z).
# This is the XML Schema 'dateTime' type
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])?$",
]
if __name__ == "__main__": # pragma: no cover
from .console import Console
console = Console()
console.print("[bold green]hello world![/bold green]")
console.print("'[bold green]hello world![/bold green]'")
console.print(" /foo")
console.print("/foo/")
console.print("/foo/bar")
console.print("foo/bar/baz")
console.print("/foo/bar/baz?foo=bar+egg&egg=baz")
console.print("/foo/bar/baz/")
console.print("/foo/bar/baz/egg")
console.print("/foo/bar/baz/egg.py")
console.print("/foo/bar/baz/egg.py word")
console.print(" /foo/bar/baz/egg.py word")
console.print("foo /foo/bar/baz/egg.py word")
console.print("foo /foo/bar/ba._++z/egg+.py word")
console.print("https://example.org?foo=bar#header")
console.print(1234567.34)
console.print(1 / 2)
console.print(-1 / 123123123123)
console.print(
"127.0.1.1 bar 192.168.1.4 2001:0db8:85a3:0000:0000:8a2e:0370:7334 foo"
)
import json
console.print_json(json.dumps(obj={"name": "apple", "count": 1}), indent=None)