Helpviewer/AdBlock/AdBlockRule.py

Mon, 28 Dec 2009 16:03:33 +0000

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Mon, 28 Dec 2009 16:03:33 +0000
changeset 0
de9c2efb9d02
child 13
1af94a91f439
permissions
-rw-r--r--

Started porting eric4 to Python3

0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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Detlev Offenbach <detlev@die-offenbachs.de>
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6 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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7 Module implementing the AdBlock rule class.
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Detlev Offenbach <detlev@die-offenbachs.de>
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8 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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9
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Detlev Offenbach <detlev@die-offenbachs.de>
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10 import re
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Detlev Offenbach <detlev@die-offenbachs.de>
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11
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Detlev Offenbach <detlev@die-offenbachs.de>
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12 from PyQt4.QtCore import *
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Detlev Offenbach <detlev@die-offenbachs.de>
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13
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Detlev Offenbach <detlev@die-offenbachs.de>
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14 class AdBlockRule(object):
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Detlev Offenbach <detlev@die-offenbachs.de>
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15 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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16 Class implementing the AdBlock rule.
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Detlev Offenbach <detlev@die-offenbachs.de>
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17 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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18 def __init__(self, filter = ""):
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Detlev Offenbach <detlev@die-offenbachs.de>
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19 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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20 Constructor
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Detlev Offenbach <detlev@die-offenbachs.de>
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21 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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22 self.__regExp = QRegExp()
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Detlev Offenbach <detlev@die-offenbachs.de>
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23 self.__options = []
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24
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25 self.setFilter(filter)
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26
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Detlev Offenbach <detlev@die-offenbachs.de>
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27 def filter(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
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28 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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29 Public method to get the rule filter string.
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30
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Detlev Offenbach <detlev@die-offenbachs.de>
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31 @return rule filter string (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
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32 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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33 return self.__filter
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34
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35 def setFilter(self, filter):
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Detlev Offenbach <detlev@die-offenbachs.de>
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36 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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37 Public method to set the rule filter string.
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38
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Detlev Offenbach <detlev@die-offenbachs.de>
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39 @param filter rule filter string (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
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40 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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41 self.__filter = filter
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Detlev Offenbach <detlev@die-offenbachs.de>
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42
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Detlev Offenbach <detlev@die-offenbachs.de>
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43 self.__cssRule = False
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Detlev Offenbach <detlev@die-offenbachs.de>
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44 self.__enabled = True
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Detlev Offenbach <detlev@die-offenbachs.de>
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45 self.__exception = False
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Detlev Offenbach <detlev@die-offenbachs.de>
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46 regExpRule = False
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Detlev Offenbach <detlev@die-offenbachs.de>
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47
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Detlev Offenbach <detlev@die-offenbachs.de>
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48 if filter.startswith("!") or not filter.strip():
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49 self.__enabled = False
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50
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Detlev Offenbach <detlev@die-offenbachs.de>
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51 if "##" in filter:
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52 self.__cssRule = True
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53
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54 parsedLine = filter
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55 if parsedLine.startswith("@@"):
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56 self.__exception = True
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57 parsedLine = parsedLine[2:]
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58 if parsedLine.startswith("/"):
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Detlev Offenbach <detlev@die-offenbachs.de>
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59 if parsedLine.endswith("/"):
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60 parsedLine = parsedLine[1:-1]
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61 regExpRule = True
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62
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63 options = parsedLine.find("$")
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Detlev Offenbach <detlev@die-offenbachs.de>
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64 if options >= 0:
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65 self.__options = parsedLine[options + 1].split(",")
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66 parsedLine = parsedLine[:options]
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67
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68 self.setPattern(parsedLine, regExpRule)
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69
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70 if "match-case" in self.__options:
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71 self.__regExp.setCaseSensitivity(Qt.CaseSensitive)
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72 self.__options.remove("match-case")
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73
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74 def networkMatch(self, encodedUrl):
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Detlev Offenbach <detlev@die-offenbachs.de>
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75 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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76 Public method to check the rule for a match.
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77
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78 @param encodedUrl string encoded URL to be checked (string)
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79 @return flag indicating a match (boolean)
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80 """
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Detlev Offenbach <detlev@die-offenbachs.de>
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81 if self.__cssRule:
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82 return False
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83
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Detlev Offenbach <detlev@die-offenbachs.de>
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84 if not self.__enabled:
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85 return False
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86
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87 matched = self.__regExp.indexIn(encodedUrl) != -1
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88
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89 if matched and not len(self.__options) == 0:
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90 # only domain rules are supported
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91 if len(self.__options) == 1:
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92 for option in self.__options:
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93 if option.startswith("domain="):
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94 url = QUrl.fromEncoded(encodedUrl)
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95 host = url.host()
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96 domainOptions = option[7:].split("|")
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97 for domainOption in domainOptions:
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98 negate = domainOption.startswith("~")
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99 if negate:
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100 domainOption = domainOption[1:]
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101 hostMatched = domainOption == host
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102 if hostMatched and not negate:
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103 return True
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104 if not hostMatched and negate:
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105 return True
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106
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107 return False
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108
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109 return matched
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110
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111 def isException(self):
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112 """
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113 Public method to check, if the rule defines an exception.
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114
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115 @return flag indicating an exception (boolean)
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116 """
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117 return self.__exception
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118
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119 def setException(self, exception):
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120 """
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121 Public method to set the rule's exception flag.
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122
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123 @param exception flag indicating an exception rule (boolean)
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parents:
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124 """
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125 self.__exception = exception
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126
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127 def isEnabled(self):
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128 """
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129 Public method to check, if the rule is enabled.
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130
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131 @return flag indicating enabled state (boolean)
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132 """
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133 return self.__enabled
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134
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135 def setEnabled(self, enabled):
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parents:
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136 """
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137 Public method to set the rule's enabled state.
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138
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139 @param enabled flag indicating the new enabled state (boolean)
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140 """
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141 self.__enabled = enabled
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142 if not enabled:
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143 self.__filter = "!" + self.__filter
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144 else:
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145 self.__filter = self.__filter[1:]
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146
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147 def isCSSRule(self):
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148 """
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149 Public method to check, if the rule is a CSS rule.
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150
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151 @return flag indicating a CSS rule (boolean)
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152 """
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153 return self.__cssRule
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154
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155 def regExpPattern(self):
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156 """
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157 Public method to get the regexp pattern of the rule.
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158
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159 @return regexp pattern (QRegExp)
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160 """
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161 return self.__regExp.pattern()
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162
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163 def __convertPatternToRegExp(self, wildcardPattern):
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164 """
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165 Private method to convert a wildcard pattern to a regular expression.
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166
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167 @param wildcardPattern string containing the wildcard pattern (string)
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168 @return string containing a regular expression (string)
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169 """
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170 pattern = wildcardPattern
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171
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172 pattern = re.sub(r"\*+", "*", pattern) # remove multiple wildcards
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173 pattern = re.sub(r"\^\|$", "^", pattern) # remove anchors following separator placeholder
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174 pattern = re.sub(r"^(\*)", "", pattern) # remove leading wildcards
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175 pattern = re.sub(r"(\*)$", "", pattern) # remove trailing wildcards
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176 pattern = re.sub(r"(\W)", "", pattern) # escape special symbols
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177 pattern = re.sub(r"^\\\|\\\|",
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178 r"^[\w\-]+:\/+(?!\/)(?:[^\/]+\.)?", pattern) # process extended anchor at expression start
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179 pattern = re.sub(r"\\\^",
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180 r"(?:[^\w\d\-.%]|$)", pattern) # process separator placeholders
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181 pattern = re.sub(r"^\\\|", "^", pattern) # process anchor at expression start
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182 pattern = re.sub(r"\\\|$", "$", pattern) # process anchor at expression end
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183 pattern = re.sub(r"\\\*", ".*", pattern) # replace wildcards by .*
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184
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185 return pattern
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186
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187 def setPattern(self, pattern, isRegExp):
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188 """
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189 Public method to set the rule pattern.
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190
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191 @param pattern string containing the pattern (string)
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192 @param isRegExp flag indicating a reg exp pattern (boolean)
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193 """
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194 if isRegExp:
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195 self.__regExp = QRegExp(pattern, Qt.CaseInsensitive, QRegExp.RegExp2)
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196 else:
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197 self.__regExp = QRegExp(self.__convertPatternToRegExp(pattern),
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198 Qt.CaseInsensitive, QRegExp.RegExp2)

eric ide

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