QScintilla/Lexers/LexerPython.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
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child 12
1d8dd9706f46
permissions
-rw-r--r--

Started porting eric4 to Python3

0
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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2002 - 2009 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 a Python lexer with some additional methods.
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8 """
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9
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10 import re
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11
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12 from PyQt4.Qsci import QsciLexerPython, QsciScintilla
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13
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14 from Lexer import Lexer
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15 import Preferences
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16
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17 class LexerPython(QsciLexerPython, Lexer):
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18 """
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19 Subclass to implement some additional lexer dependant methods.
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20 """
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21 def __init__(self, parent=None):
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22 """
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23 Constructor
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24
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25 @param parent parent widget of this lexer
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26 """
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27 QsciLexerPython.__init__(self, parent)
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28 Lexer.__init__(self)
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29
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30 self.commentString = "#"
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31
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32 def initProperties(self):
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33 """
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34 Public slot to initialize the properties.
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35 """
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36 if Preferences.getEditor("PythonBadIndentation"):
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37 self.setIndentationWarning(QsciLexerPython.Inconsistent)
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38 else:
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39 self.setIndentationWarning(QsciLexerPython.NoWarning)
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40 self.setFoldComments(Preferences.getEditor("PythonFoldComment"))
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41 self.setFoldQuotes(Preferences.getEditor("PythonFoldString"))
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42 if not Preferences.getEditor("PythonAutoIndent"):
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43 self.setAutoIndentStyle(QsciScintilla.AiMaintain)
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44 try:
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45 self.setV2UnicodeAllowed(Preferences.getEditor("PythonAllowV2Unicode"))
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46 self.setV3BinaryOctalAllowed(Preferences.getEditor("PythonAllowV3Binary"))
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47 self.setV3BytesAllowed(Preferences.getEditor("PythonAllowV3Bytes"))
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48 except AttributeError:
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49 pass
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50
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51 def getIndentationDifference(self, line, editor):
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52 """
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53 Private method to determine the difference for the new indentation.
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54
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55 @param line line to perform the calculation for (integer)
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56 @param editor QScintilla editor
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57 @return amount of difference in indentation (integer)
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58 """
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59 indent_width = Preferences.getEditor('IndentWidth')
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60
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61 lead_spaces = editor.indentation(line)
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62
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63 pline = line - 1
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64 while pline >= 0 and re.match('^\s*(#.*)?$', editor.text(pline)):
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65 pline -= 1
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66
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67 if pline < 0:
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68 last = 0
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69 else:
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70 previous_lead_spaces = editor.indentation(pline)
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71 # trailing spaces
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72 m = re.search(':\s*(#.*)?$', editor.text(pline))
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73 last = previous_lead_spaces
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74 if m:
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75 last += indent_width
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76 else:
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77 # special cases, like pass (unindent) or return (also unindent)
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78 m = re.search('(pass\s*(#.*)?$)|(^[^#]return)',
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79 editor.text(pline))
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80 if m:
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81 last -= indent_width
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82
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83 if lead_spaces % indent_width != 0 or lead_spaces == 0 \
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84 or self.lastIndented != line:
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85 indentDifference = last - lead_spaces
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86 else:
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87 indentDifference = -indent_width
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88
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89 return indentDifference
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90
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91 def autoCompletionWordSeparators(self):
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92 """
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93 Public method to return the list of separators for autocompletion.
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94
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95 @return list of separators (list of strings)
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96 """
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97 return ['.']
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98
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99 def isCommentStyle(self, style):
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100 """
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101 Public method to check, if a style is a comment style.
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102
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103 @return flag indicating a comment style (boolean)
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104 """
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105 return style in [QsciLexerPython.Comment,
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106 QsciLexerPython.CommentBlock]
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107
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108 def isStringStyle(self, style):
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109 """
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110 Public method to check, if a style is a string style.
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111
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112 @return flag indicating a string style (boolean)
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113 """
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114 return style in [QsciLexerPython.DoubleQuotedString,
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115 QsciLexerPython.SingleQuotedString,
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116 QsciLexerPython.TripleDoubleQuotedString,
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117 QsciLexerPython.TripleSingleQuotedString,
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118 QsciLexerPython.UnclosedString]

eric ide

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