Utilities/ClassBrowsers/jsclbr.py

Thu, 01 Jan 2015 13:11:59 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Thu, 01 Jan 2015 13:11:59 +0100
changeset 4021
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parent 3591
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child 4631
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permissions
-rw-r--r--

Updated copyright for 2015.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2013 - 2015 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 Parse a JavaScript file and retrieve variables and functions.
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8
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9 It uses the JavaScript parser contained in the jasy web framework.
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10 """
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11
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12 from __future__ import unicode_literals
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13
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14 import jasy.js.parse.Parser as jsParser
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15 import jasy.js.tokenize.Tokenizer as jsTokenizer
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16
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17 import Utilities
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18 import Utilities.ClassBrowsers as ClassBrowsers
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19 from . import ClbrBaseClasses
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20
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21 SUPPORTED_TYPES = [ClassBrowsers.JS_SOURCE]
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22
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23 _modules = {} # cache of modules we've seen
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24
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25
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26 class VisibilityMixin(ClbrBaseClasses.ClbrVisibilityMixinBase):
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27 """
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28 Mixin class implementing the notion of visibility.
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29 """
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30 def __init__(self):
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31 """
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32 Constructor
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33 """
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34 if self.name.startswith('__'):
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35 self.setPrivate()
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36 elif self.name.startswith('_'):
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37 self.setProtected()
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38 else:
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39 self.setPublic()
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40
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41
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42 class Function(ClbrBaseClasses.Function, VisibilityMixin):
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43 """
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44 Class to represent a Python function.
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45 """
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46 def __init__(self, module, name, file, lineno, signature='',
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47 separator=','):
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48 """
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49 Constructor
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50
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51 @param module name of the module containing this function
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52 @param name name of this function
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53 @param file filename containing this class
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54 @param lineno linenumber of the class definition
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55 @param signature parameterlist of the method
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56 @param separator string separating the parameters
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57 """
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58 ClbrBaseClasses.Function.__init__(self, module, name, file, lineno,
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59 signature, separator)
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60 VisibilityMixin.__init__(self)
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61
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62
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63 class Attribute(ClbrBaseClasses.Attribute, VisibilityMixin):
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64 """
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65 Class to represent a class attribute.
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66 """
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67 def __init__(self, module, name, file, lineno):
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68 """
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69 Constructor
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70
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71 @param module name of the module containing this class
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72 @param name name of this class
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73 @param file filename containing this attribute
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74 @param lineno linenumber of the class definition
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75 """
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76 ClbrBaseClasses.Attribute.__init__(self, module, name, file, lineno)
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77 VisibilityMixin.__init__(self)
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78
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79
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80 class Visitor(object):
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81 """
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82 Class implementing a visitor going through the parsed tree.
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83 """
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84 def __init__(self, src, module, filename):
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85 """
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86 Constructor
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87
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88 @param src source to be parsed (string)
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89 @param module name of the module (string)
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90 @param filename file name (string)
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91 """
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92 self.__dict = {}
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93 self.__dict_counts = {}
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94 self.__root = None
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95 self.__stack = []
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96
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97 self.__module = module
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98 self.__file = filename
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99 self.__source = src
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100
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101 # normalize line endings
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102 self.__source = self.__source.replace("\r\n", "\n").replace("\r", "\n")
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103
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104 # ensure source ends with an eol
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105 if self.__source[-1] != '\n':
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106 self.__source = self.__source + '\n'
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107
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108 def parse(self):
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109 """
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110 Public method to parse the source.
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111
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112 @return dictionary containing the parsed information
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113 """
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114 try:
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115 self.__root = jsParser.parse(self.__source, self.__file)
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116 self.__visit(self.__root)
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117 except jsParser.SyntaxError:
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118 # ignore syntax errors of the parser
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119 pass
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120 except jsTokenizer.ParseError:
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121 # ignore syntax errors of the tokenizer
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122 pass
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123
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124 return self.__dict
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125
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126 def __visit(self, root):
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127 """
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128 Private method implementing the visit logic delegating to interesting
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129 methods.
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130
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131 @param root root node to visit
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132 """
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133 call = lambda n: getattr(self, "visit_{0}".format(n.type),
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134 self.visit_noop)(n)
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135 call(root)
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136 for node in root:
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137 self.__visit(node)
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138
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139 def visit_noop(self, node):
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140 """
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parents:
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141 Public method to ignore the given node.
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142
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143 @param node reference to the node (jasy.js.parse.Node.Node)
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144 """
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parents:
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145 pass
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146
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147 def visit_function(self, node):
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148 """
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parents:
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149 Public method to treat a function node.
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150
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151 @param node reference to the node (jasy.js.parse.Node.Node)
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152 """
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153 if node.type == "function" and \
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154 getattr(node, "name", None) and \
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155 node.functionForm == "declared_form":
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156 if self.__stack and self.__stack[-1].endlineno < node.line:
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157 del self.__stack[-1]
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158 endline = node.line + self.__source.count(
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159 '\n', node.start, node.end)
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160 if getattr(node, "params", None):
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161 func_sig = ", ".join([p.value for p in node.params])
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162 else:
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163 func_sig = ""
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164 if self.__stack:
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165 # it's a nested function
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166 cur_func = self.__stack[-1]
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167 f = Function(None, node.name,
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168 self.__file, node.line, func_sig)
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169 f.setEndLine(endline)
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170 cur_func._addmethod(node.name, f)
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171 else:
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172 f = Function(self.__module, node.name,
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173 self.__file, node.line, func_sig)
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174 f.setEndLine(endline)
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175 func_name = node.name
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176 if func_name in self.__dict_counts:
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177 self.__dict_counts[func_name] += 1
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178 func_name = "{0}_{1:d}".format(
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179 func_name, self.__dict_counts[func_name])
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180 else:
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181 self.__dict_counts[func_name] = 0
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182 self.__dict[func_name] = f
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183 self.__stack.append(f)
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184
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185 def visit_property_init(self, node):
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186 """
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187 Public method to treat a property_init node.
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188
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189 @param node reference to the node (jasy.js.parse.Node.Node)
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190 """
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parents:
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191 if node.type == "property_init" and node[1].type == "function":
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192 if self.__stack and self.__stack[-1].endlineno < node[0].line:
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193 del self.__stack[-1]
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194 endline = node[0].line + self.__source.count(
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195 '\n', node.start, node[1].end)
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196 if getattr(node[1], "params", None):
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197 func_sig = ", ".join([p.value for p in node[1].params])
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198 else:
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199 func_sig = ""
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diff changeset
200 if self.__stack:
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parents:
diff changeset
201 # it's a nested function
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202 cur_func = self.__stack[-1]
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203 f = Function(None, node[0].value,
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diff changeset
204 self.__file, node[0].line, func_sig)
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parents:
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205 f.setEndLine(endline)
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parents:
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206 cur_func._addmethod(node[0].value, f)
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207 else:
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parents:
diff changeset
208 f = Function(self.__module, node[0].value,
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diff changeset
209 self.__file, node[0].line, func_sig)
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diff changeset
210 f.setEndLine(endline)
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parents:
diff changeset
211 func_name = node[0].value
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parents:
diff changeset
212 if func_name in self.__dict_counts:
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diff changeset
213 self.__dict_counts[func_name] += 1
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parents:
diff changeset
214 func_name = "{0}_{1:d}".format(
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diff changeset
215 func_name, self.__dict_counts[func_name])
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parents:
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216 else:
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parents:
diff changeset
217 self.__dict_counts[func_name] = 0
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218 self.__dict[func_name] = f
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219 self.__stack.append(f)
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220
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221 def visit_var(self, node):
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222 """
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223 Public method to treat a variable node.
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224
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diff changeset
225 @param node reference to the node (jasy.js.parse.Node.Node)
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226 """
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parents:
diff changeset
227 if node.type == "var" and \
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parents:
diff changeset
228 node.parent.type == "script" and \
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parents:
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229 node.getChildrenLength():
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parents:
diff changeset
230 if self.__stack and self.__stack[-1].endlineno < node[0].line:
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parents:
diff changeset
231 del self.__stack[-1]
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parents:
diff changeset
232 if self.__stack:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233 # function variables
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parents:
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234 for var in node:
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Detlev Offenbach <detlev@die-offenbachs.de>
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235 attr = Attribute(
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2965
diff changeset
236 self.__module, var.name, self.__file, var.line)
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diff changeset
237 self.__stack[-1]._addattribute(attr)
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238 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
239 # global variable
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parents:
diff changeset
240 if "@@Globals@@" not in self.__dict:
2997
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2965
diff changeset
241 self.__dict["@@Globals@@"] = ClbrBaseClasses.ClbrBase(
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2965
diff changeset
242 self.__module, "Globals", self.__file, 0)
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diff changeset
243 for var in node:
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parents: 2965
diff changeset
244 self.__dict["@@Globals@@"]._addglobal(Attribute(
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2965
diff changeset
245 self.__module, var.name, self.__file, var.line))
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246
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247 def visit_const(self, node):
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248 """
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249 Public method to treat a constant node.
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250
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251 @param node reference to the node (jasy.js.parse.Node.Node)
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252 """
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253 if node.type == "const" and \
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254 node.parent.type == "script" and \
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255 node.getChildrenLength():
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256 if self.__stack and self.__stack[-1].endlineno < node[0].line:
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257 del self.__stack[-1]
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258 if self.__stack:
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259 # function variables
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260 for var in node:
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261 attr = Attribute(self.__module, "const " + var.name,
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262 self.__file, var.line)
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263 self.__stack[-1]._addattribute(attr)
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264 else:
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265 # global variable
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266 if "@@Globals@@" not in self.__dict:
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267 self.__dict["@@Globals@@"] = ClbrBaseClasses.ClbrBase(
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268 self.__module, "Globals", self.__file, 0)
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269 for var in node:
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270 self.__dict["@@Globals@@"]._addglobal(
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271 Attribute(self.__module, "const " + var.name,
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272 self.__file, var.line))
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273
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274
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275 def readmodule_ex(module, path=[]):
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276 """
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277 Read a JavaScript file and return a dictionary of functions and variables.
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278
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279 @param module name of the JavaScript file (string)
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280 @param path path the file should be searched in (list of strings)
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281 @return the resulting dictionary
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282 """
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283 global _modules
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284
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285 dict = {}
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286
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287 if module in _modules:
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288 # we've seen this file before...
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289 return _modules[module]
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290
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291 # search the path for the file
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292 f = None
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293 fullpath = list(path)
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294 f, file, (suff, mode, type) = ClassBrowsers.find_module(module, fullpath)
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295 if f:
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296 f.close()
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297 if type not in SUPPORTED_TYPES:
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298 # not CORBA IDL source, can't do anything with this module
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299 _modules[module] = dict
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300 return dict
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301
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302 _modules[module] = dict
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303 try:
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304 src = Utilities.readEncodedFile(file)[0]
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305 except (UnicodeError, IOError):
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306 # can't do anything with this module
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307 _modules[module] = dict
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308 return dict
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309
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310 visitor = Visitor(src, module, file)
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311 dict = visitor.parse()
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312 _modules[module] = dict
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313 return dict

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