You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
2.9 KiB
111 lines
2.9 KiB
4 years ago
|
"""Utility."""
|
||
|
|
from functools import wraps, lru_cache
|
||
|
|
import warnings
|
||
|
|
import re
|
||
|
|
|
||
|
|
DEBUG = 0x00001
|
||
|
|
|
||
|
|
RE_PATTERN_LINE_SPLIT = re.compile(r'(?:\r\n|(?!\r\n)[\n\r])|$')
|
||
|
|
|
||
|
|
UC_A = ord('A')
|
||
|
|
UC_Z = ord('Z')
|
||
|
|
|
||
|
|
|
||
|
|
@lru_cache(maxsize=512)
|
||
|
|
def lower(string):
|
||
|
|
"""Lower."""
|
||
|
|
|
||
|
|
new_string = []
|
||
|
|
for c in string:
|
||
|
|
o = ord(c)
|
||
|
|
new_string.append(chr(o + 32) if UC_A <= o <= UC_Z else c)
|
||
|
|
return ''.join(new_string)
|
||
|
|
|
||
|
|
|
||
|
|
class SelectorSyntaxError(Exception):
|
||
|
|
"""Syntax error in a CSS selector."""
|
||
|
|
|
||
|
|
def __init__(self, msg, pattern=None, index=None):
|
||
|
|
"""Initialize."""
|
||
|
|
|
||
|
|
self.line = None
|
||
|
|
self.col = None
|
||
|
|
self.context = None
|
||
|
|
|
||
|
|
if pattern is not None and index is not None:
|
||
|
|
# Format pattern to show line and column position
|
||
|
|
self.context, self.line, self.col = get_pattern_context(pattern, index)
|
||
|
|
msg = '{}\n line {}:\n{}'.format(msg, self.line, self.context)
|
||
|
|
|
||
|
|
super(SelectorSyntaxError, self).__init__(msg)
|
||
|
|
|
||
|
|
|
||
|
|
def deprecated(message, stacklevel=2): # pragma: no cover
|
||
|
|
"""
|
||
|
|
Raise a `DeprecationWarning` when wrapped function/method is called.
|
||
|
|
|
||
|
|
Borrowed from https://stackoverflow.com/a/48632082/866026
|
||
|
|
"""
|
||
|
|
|
||
|
|
def _decorator(func):
|
||
|
|
@wraps(func)
|
||
|
|
def _func(*args, **kwargs):
|
||
|
|
warnings.warn(
|
||
|
|
"'{}' is deprecated. {}".format(func.__name__, message),
|
||
|
|
category=DeprecationWarning,
|
||
|
|
stacklevel=stacklevel
|
||
|
|
)
|
||
|
|
return func(*args, **kwargs)
|
||
|
|
return _func
|
||
|
|
return _decorator
|
||
|
|
|
||
|
|
|
||
|
|
def warn_deprecated(message, stacklevel=2): # pragma: no cover
|
||
|
|
"""Warn deprecated."""
|
||
|
|
|
||
|
|
warnings.warn(
|
||
|
|
message,
|
||
|
|
category=DeprecationWarning,
|
||
|
|
stacklevel=stacklevel
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def get_pattern_context(pattern, index):
|
||
|
|
"""Get the pattern context."""
|
||
|
|
|
||
|
|
last = 0
|
||
|
|
current_line = 1
|
||
|
|
col = 1
|
||
|
|
text = []
|
||
|
|
line = 1
|
||
|
|
|
||
|
|
# Split pattern by newline and handle the text before the newline
|
||
|
|
for m in RE_PATTERN_LINE_SPLIT.finditer(pattern):
|
||
|
|
linetext = pattern[last:m.start(0)]
|
||
|
|
if not len(m.group(0)) and not len(text):
|
||
|
|
indent = ''
|
||
|
|
offset = -1
|
||
|
|
col = index - last + 1
|
||
|
|
elif last <= index < m.end(0):
|
||
|
|
indent = '--> '
|
||
|
|
offset = (-1 if index > m.start(0) else 0) + 3
|
||
|
|
col = index - last + 1
|
||
|
|
else:
|
||
|
|
indent = ' '
|
||
|
|
offset = None
|
||
|
|
if len(text):
|
||
|
|
# Regardless of whether we are presented with `\r\n`, `\r`, or `\n`,
|
||
|
|
# we will render the output with just `\n`. We will still log the column
|
||
|
|
# correctly though.
|
||
|
|
text.append('\n')
|
||
|
|
text.append('{}{}'.format(indent, linetext))
|
||
|
|
if offset is not None:
|
||
|
|
text.append('\n')
|
||
|
|
text.append(' ' * (col + offset) + '^')
|
||
|
|
line = current_line
|
||
|
|
|
||
|
|
current_line += 1
|
||
|
|
last = m.end(0)
|
||
|
|
|
||
|
|
return ''.join(text), line, col
|