annotate env/lib/python3.7/site-packages/soupsieve/util.py @ 0:26e78fe6e8c4 draft

"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """Utility."""
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2 from functools import wraps
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3 import warnings
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4 import os
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5 import re
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6 MODULE = os.path.dirname(__file__)
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7
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8 DEBUG = 0x00001
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9
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10 RE_PATTERN_LINE_SPLIT = re.compile(r'(?:\r\n|(?!\r\n)[\n\r])|$')
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11
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12 LC_A = ord('a')
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13 LC_Z = ord('z')
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14 UC_A = ord('A')
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15 UC_Z = ord('Z')
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16
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17
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18 def lower(string):
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19 """Lower."""
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20
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21 new_string = []
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22 for c in string:
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23 o = ord(c)
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24 new_string.append(chr(o + 32) if UC_A <= o <= UC_Z else c)
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25 return ''.join(new_string)
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26
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27
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28 def upper(string): # pragma: no cover
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29 """Lower."""
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30
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31 new_string = []
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32 for c in string:
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33 o = ord(c)
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34 new_string.append(chr(o - 32) if LC_A <= o <= LC_Z else c)
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35 return ''.join(new_string)
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36
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37
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38 class SelectorSyntaxError(Exception):
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39 """Syntax error in a CSS selector."""
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40
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41 def __init__(self, msg, pattern=None, index=None):
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42 """Initialize."""
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43
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44 self.line = None
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45 self.col = None
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46 self.context = None
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47
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48 if pattern is not None and index is not None:
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49 # Format pattern to show line and column position
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50 self.context, self.line, self.col = get_pattern_context(pattern, index)
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51 msg = '{}\n line {}:\n{}'.format(msg, self.line, self.context)
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52
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53 super(SelectorSyntaxError, self).__init__(msg)
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54
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55
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56 def deprecated(message, stacklevel=2): # pragma: no cover
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57 """
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58 Raise a `DeprecationWarning` when wrapped function/method is called.
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59
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60 Borrowed from https://stackoverflow.com/a/48632082/866026
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61 """
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62
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63 def _decorator(func):
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64 @wraps(func)
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65 def _func(*args, **kwargs):
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66 warnings.warn(
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67 "'{}' is deprecated. {}".format(func.__name__, message),
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68 category=DeprecationWarning,
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69 stacklevel=stacklevel
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70 )
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71 return func(*args, **kwargs)
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72 return _func
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73 return _decorator
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74
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75
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76 def warn_deprecated(message, stacklevel=2): # pragma: no cover
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77 """Warn deprecated."""
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78
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79 warnings.warn(
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80 message,
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81 category=DeprecationWarning,
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82 stacklevel=stacklevel
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83 )
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84
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85
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86 def get_pattern_context(pattern, index):
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87 """Get the pattern context."""
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88
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89 last = 0
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90 current_line = 1
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91 col = 1
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92 text = []
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93 line = 1
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94
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95 # Split pattern by newline and handle the text before the newline
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96 for m in RE_PATTERN_LINE_SPLIT.finditer(pattern):
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97 linetext = pattern[last:m.start(0)]
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98 if not len(m.group(0)) and not len(text):
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99 indent = ''
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100 offset = -1
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101 col = index - last + 1
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102 elif last <= index < m.end(0):
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103 indent = '--> '
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104 offset = (-1 if index > m.start(0) else 0) + 3
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105 col = index - last + 1
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106 else:
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107 indent = ' '
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108 offset = None
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109 if len(text):
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110 # Regardless of whether we are presented with `\r\n`, `\r`, or `\n`,
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111 # we will render the output with just `\n`. We will still log the column
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112 # correctly though.
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113 text.append('\n')
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114 text.append('{}{}'.format(indent, linetext))
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115 if offset is not None:
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116 text.append('\n')
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117 text.append(' ' * (col + offset) + '^')
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118 line = current_line
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119
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120 current_line += 1
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121 last = m.end(0)
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122
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123 return ''.join(text), line, col