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"""
pygments.lexers.email
~~~~~~~~~~~~~~~~~~~~~
Lexer for the raw E-mail.
:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, DelegatingLexer, bygroups
from pygments.lexers.mime import MIMELexer
from pygments.token import Text, Keyword, Name, String, Number, Comment
from pygments.util import get_bool_opt
__all__ = ["EmailLexer"]
class EmailHeaderLexer(RegexLexer):
"""
Sub-lexer for raw E-mail. This lexer only process header part of e-mail.
.. versionadded:: 2.5
"""
def __init__(self, **options):
super().__init__(**options)
self.highlight_x = get_bool_opt(options, "highlight-X-header", False)
def get_x_header_tokens(self, match):
if self.highlight_x:
# field
yield match.start(1), Name.Tag, match.group(1)
# content
default_actions = self.get_tokens_unprocessed(
match.group(2), stack=("root", "header"))
yield from default_actions
else:
# lowlight
yield match.start(1), Comment.Special, match.group(1)
yield match.start(2), Comment.Multiline, match.group(2)
tokens = {
"root": [
(r"^(?:[A-WYZ]|X400)[\w\-]*:", Name.Tag, "header"),
(r"^(X-(?:\w[\w\-]*:))([\s\S]*?\n)(?![ \t])", get_x_header_tokens),
],
"header": [
# folding
(r"\n[ \t]", Text.Whitespace),
(r"\n(?![ \t])", Text.Whitespace, "#pop"),
# keywords
(r"\bE?SMTPS?\b", Keyword),
(r"\b(?:HE|EH)LO\b", Keyword),
# mailbox
(r"[\w\.\-\+=]+@[\w\.\-]+", Name.Label),
(r"<[\w\.\-\+=]+@[\w\.\-]+>", Name.Label),
# domain
(r"\b(\w[\w\.-]*\.[\w\.-]*\w[a-zA-Z]+)\b", Name.Function),
# IPv4
(
r"(?<=\b)(?:(?:25[0-5]|2[0-4][0-9]|1?[0-9][0-9]?)\.){3}(?:25[0"
r"-5]|2[0-4][0-9]|1?[0-9][0-9]?)(?=\b)",
Number.Integer,
),
# IPv6
(r"(?<=\b)([0-9a-fA-F]{1,4}:){1,7}:(?!\b)", Number.Hex),
(r"(?<=\b):((:[0-9a-fA-F]{1,4}){1,7}|:)(?=\b)", Number.Hex),
(r"(?<=\b)([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}(?=\b)", Number.Hex),
(r"(?<=\b)([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}(?=\b)", Number.Hex),
(r"(?<=\b)[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})(?=\b)", Number.Hex),
(r"(?<=\b)fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}(?=\b)", Number.Hex),
(r"(?<=\b)([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}(?=\b)", Number.Hex),
(r"(?<=\b)([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}(?=\b)",
Number.Hex),
(r"(?<=\b)([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}(?=\b)",
Number.Hex),
(r"(?<=\b)([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}(?=\b)",
Number.Hex),
(
r"(?<=\b)::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}"
r"[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}"
r"[0-9])(?=\b)",
Number.Hex,
),
(
r"(?<=\b)([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-"
r"9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-"
r"9])(?=\b)",
Number.Hex,
),
# Date time
(
r"(?:(Sun|Mon|Tue|Wed|Thu|Fri|Sat),\s+)?(0[1-9]|[1-2]?[0-9]|3["
r"01])\s+(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+("
r"19[0-9]{2}|[2-9][0-9]{3})\s+(2[0-3]|[0-1][0-9]):([0-5][0-9])"
r"(?::(60|[0-5][0-9]))?(?:\.\d{1,5})?\s+([-\+][0-9]{2}[0-5][0-"
r"9]|\(?(?:UTC?|GMT|(?:E|C|M|P)(?:ST|ET|DT)|[A-IK-Z])\)?)",
Name.Decorator,
),
# RFC-2047 encoded string
(
r"(=\?)([\w-]+)(\?)([BbQq])(\?)([\[\w!\"#$%&\'()*+,-./:;<=>@[\\"
r"\]^_`{|}~]+)(\?=)",
bygroups(
String.Affix,
Name.Constant,
String.Affix,
Keyword.Constant,
String.Affix,
Number.Hex,
String.Affix
)
),
# others
(r'[\s]+', Text.Whitespace),
(r'[\S]', Text),
],
}
class EmailLexer(DelegatingLexer):
"""
Lexer for raw E-mail.
Additional options accepted:
`highlight-X-header`
Highlight the fields of ``X-`` user-defined email header. (default:
``False``).
.. versionadded:: 2.5
"""
name = "E-mail"
aliases = ["email", "eml"]
filenames = ["*.eml"]
mimetypes = ["message/rfc822"]
def __init__(self, **options):
super().__init__(EmailHeaderLexer, MIMELexer, Comment, **options)
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