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comparison planemo/lib/python3.7/site-packages/soupsieve/util.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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0:d30785e31577 1:56ad4e20f292
1 """Utility."""
2 from functools import wraps
3 import warnings
4 import re
5
6 DEBUG = 0x00001
7
8 RE_PATTERN_LINE_SPLIT = re.compile(r'(?:\r\n|(?!\r\n)[\n\r])|$')
9
10 LC_A = ord('a')
11 LC_Z = ord('z')
12 UC_A = ord('A')
13 UC_Z = ord('Z')
14
15
16 def lower(string):
17 """Lower."""
18
19 new_string = []
20 for c in string:
21 o = ord(c)
22 new_string.append(chr(o + 32) if UC_A <= o <= UC_Z else c)
23 return ''.join(new_string)
24
25
26 def upper(string): # pragma: no cover
27 """Lower."""
28
29 new_string = []
30 for c in string:
31 o = ord(c)
32 new_string.append(chr(o - 32) if LC_A <= o <= LC_Z else c)
33 return ''.join(new_string)
34
35
36 class SelectorSyntaxError(Exception):
37 """Syntax error in a CSS selector."""
38
39 def __init__(self, msg, pattern=None, index=None):
40 """Initialize."""
41
42 self.line = None
43 self.col = None
44 self.context = None
45
46 if pattern is not None and index is not None:
47 # Format pattern to show line and column position
48 self.context, self.line, self.col = get_pattern_context(pattern, index)
49 msg = '{}\n line {}:\n{}'.format(msg, self.line, self.context)
50
51 super(SelectorSyntaxError, self).__init__(msg)
52
53
54 def deprecated(message, stacklevel=2): # pragma: no cover
55 """
56 Raise a `DeprecationWarning` when wrapped function/method is called.
57
58 Borrowed from https://stackoverflow.com/a/48632082/866026
59 """
60
61 def _decorator(func):
62 @wraps(func)
63 def _func(*args, **kwargs):
64 warnings.warn(
65 "'{}' is deprecated. {}".format(func.__name__, message),
66 category=DeprecationWarning,
67 stacklevel=stacklevel
68 )
69 return func(*args, **kwargs)
70 return _func
71 return _decorator
72
73
74 def warn_deprecated(message, stacklevel=2): # pragma: no cover
75 """Warn deprecated."""
76
77 warnings.warn(
78 message,
79 category=DeprecationWarning,
80 stacklevel=stacklevel
81 )
82
83
84 def get_pattern_context(pattern, index):
85 """Get the pattern context."""
86
87 last = 0
88 current_line = 1
89 col = 1
90 text = []
91 line = 1
92
93 # Split pattern by newline and handle the text before the newline
94 for m in RE_PATTERN_LINE_SPLIT.finditer(pattern):
95 linetext = pattern[last:m.start(0)]
96 if not len(m.group(0)) and not len(text):
97 indent = ''
98 offset = -1
99 col = index - last + 1
100 elif last <= index < m.end(0):
101 indent = '--> '
102 offset = (-1 if index > m.start(0) else 0) + 3
103 col = index - last + 1
104 else:
105 indent = ' '
106 offset = None
107 if len(text):
108 # Regardless of whether we are presented with `\r\n`, `\r`, or `\n`,
109 # we will render the output with just `\n`. We will still log the column
110 # correctly though.
111 text.append('\n')
112 text.append('{}{}'.format(indent, linetext))
113 if offset is not None:
114 text.append('\n')
115 text.append(' ' * (col + offset) + '^')
116 line = current_line
117
118 current_line += 1
119 last = m.end(0)
120
121 return ''.join(text), line, col