QScintilla/Lexers/Lexer.py

Sun, 29 Sep 2013 18:22:08 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sun, 29 Sep 2013 18:22:08 +0200
changeset 2965
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parent 2302
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child 3011
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permissions
-rw-r--r--

Continued correcting doc strings by using the new doc string checker.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2003 - 2013 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing the lexer mixin class.
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8 """
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9
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10 import Preferences
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11
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12
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13 class Lexer(object):
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14 """
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15 Class to implement the lexer mixin class.
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16 """
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17 def __init__(self):
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18 """
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19 Constructor
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20 """
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21 self.commentString = ''
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22 self.streamCommentString = {
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23 'start': '',
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24 'end': ''
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25 }
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26 self.boxCommentString = {
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27 'start': '',
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28 'middle': '',
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29 'end': ''
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30 }
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31
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32 # last indented line wrapper
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33 self.lastIndented = -1
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34 self.lastIndentedIndex = -1
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35
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36 # always keep tabs (for languages where tabs are esential
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37 self._alwaysKeepTabs = False
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38
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39 def initProperties(self):
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40 """
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41 Public slot to initialize the properties.
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42 """
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43 # default implementation is a do nothing
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44 return
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45
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46 def commentStr(self):
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47 """
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48 Public method to return the comment string.
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49
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50 @return comment string (string)
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51 """
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52 return self.commentString
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53
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54 def canBlockComment(self):
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55 """
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56 Public method to determine, whether the lexer language supports a block comment.
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57
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58 @return flag (boolean)
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59 """
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60 return self.commentString != ""
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61
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62 def streamCommentStr(self):
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63 """
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64 Public method to return the stream comment strings.
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65
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66 @return stream comment strings (dictionary with two strings)
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67 """
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68 return self.streamCommentString
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69
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70 def canStreamComment(self):
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71 """
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72 Public method to determine, whether the lexer language supports a stream comment.
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73
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74 @return flag (boolean)
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75 """
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76 return \
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77 (self.streamCommentString['start'] != "") and \
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78 (self.streamCommentString['end'] != "")
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79
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80 def boxCommentStr(self):
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81 """
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82 Public method to return the box comment strings.
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83
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84 @return box comment strings (dictionary with three QStrings)
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85 """
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86 return self.boxCommentString
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87
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88 def canBoxComment(self):
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89 """
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90 Public method to determine, whether the lexer language supports a box comment.
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91
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92 @return flag (boolean)
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93 """
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94 return \
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95 (self.boxCommentString['start'] != "") and \
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96 (self.boxCommentString['middle'] != "") and \
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97 (self.boxCommentString['end'] != "")
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98
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99 def alwaysKeepTabs(self):
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100 """
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101 Public method to check, if tab conversion is allowed.
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102
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103 @return flag indicating to keep tabs (boolean)
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104 """
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105 return self._alwaysKeepTabs
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106
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107 def hasSmartIndent(self):
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108 """
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109 Public method indicating whether lexer can do smart indentation.
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110
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111 @return flag indicating availability of smartIndentLine and
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112 smartIndentSelection methods (boolean)
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113 """
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114 return hasattr(self, 'getIndentationDifference')
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115
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116 def smartIndentLine(self, editor):
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117 """
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118 Public method to handle smart indentation for a line.
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119
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120 @param editor reference to the QScintilla editor object
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121 """
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122 cline, cindex = editor.getCursorPosition()
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123
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124 # get leading spaces
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125 lead_spaces = editor.indentation(cline)
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126
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127 # get the indentation difference
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128 indentDifference = self.getIndentationDifference(cline, editor)
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129
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130 if indentDifference != 0:
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131 editor.setIndentation(cline, lead_spaces + indentDifference)
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132 editor.setCursorPosition(cline, cindex + indentDifference)
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133
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134 self.lastIndented = cline
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135
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136 def smartIndentSelection(self, editor):
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137 """
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138 Public method to handle smart indentation for a selection of lines.
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139
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140 Note: The assumption is, that the first line determines the new
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141 indentation level.
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142
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143 @param editor reference to the QScintilla editor object
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144 """
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145 if not editor.hasSelectedText():
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146 return
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147
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148 # get the selection
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149 lineFrom, indexFrom, lineTo, indexTo = editor.getSelection()
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150 if lineFrom != self.lastIndented:
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151 self.lastIndentedIndex = indexFrom
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152
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153 if indexTo == 0:
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154 endLine = lineTo - 1
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155 else:
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156 endLine = lineTo
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157
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158 # get the indentation difference
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159 indentDifference = self.getIndentationDifference(lineFrom, editor)
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160
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161 editor.beginUndoAction()
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162 # iterate over the lines
945
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163 for line in range(lineFrom, endLine + 1):
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164 editor.setIndentation(line,
0
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165 editor.indentation(line) + indentDifference)
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166 editor.endUndoAction()
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167
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168 if self.lastIndentedIndex != 0:
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169 indexStart = indexFrom + indentDifference
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170 else:
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171 indexStart = 0
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172 if indexStart < 0:
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173 indexStart = 0
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174 indexEnd = indexTo != 0 and (indexTo + indentDifference) or 0
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175 if indexEnd < 0:
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176 indexEnd = 0
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177 editor.setSelection(lineFrom, indexStart, lineTo, indexEnd)
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178
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179 self.lastIndented = lineFrom
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180
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181 def autoCompletionWordSeparators(self):
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182 """
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183 Public method to return the list of separators for autocompletion.
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184
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185 @return list of separators (list of strings)
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186 """
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187 return []
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188
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189 def isCommentStyle(self, style):
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190 """
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191 Public method to check, if a style is a comment style.
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192
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193 @param style style to check (integer)
0
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194 @return flag indicating a comment style (boolean)
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195 """
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196 return True
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197
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198 def isStringStyle(self, style):
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199 """
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200 Public method to check, if a style is a string style.
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201
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202 @param style style to check (integer)
0
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203 @return flag indicating a string style (boolean)
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204 """
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205 return True
130
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206
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207 def keywords(self, kwSet):
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208 """
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209 Public method to get the keywords.
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210
167
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211 @param kwSet number of the keyword set (integer)
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212 @return string giving the keywords (string) or None
130
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213 """
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diff changeset
214 keywords_ = Preferences.getEditorKeywords(self.language())
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215 if keywords_ and len(keywords_) > kwSet:
130
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diff changeset
216 kw = keywords_[kwSet]
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parents: 97
diff changeset
217 if kw == "":
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parents: 97
diff changeset
218 return None
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parents: 97
diff changeset
219 else:
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diff changeset
220 return kw
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parents: 97
diff changeset
221 else:
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parents: 97
diff changeset
222 return self.defaultKeywords(kwSet)

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