Utilities/ClassBrowsers/jsclbr.py

Tue, 18 Mar 2014 19:23:35 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Tue, 18 Mar 2014 19:23:35 +0100
changeset 3404
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parent 3160
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child 3410
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permissions
-rw-r--r--

Fixed an uncaught exception in the JavaScript class browser.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2013 - 2014 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 import ThirdParty.Jasy.jasy.js.parse.Parser as jsParser
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13 import ThirdParty.Jasy.jasy.js.tokenize.Tokenizer as jsTokenizer
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14
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15 import Utilities
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16 import Utilities.ClassBrowsers as ClassBrowsers
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17 from . import ClbrBaseClasses
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18
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19 SUPPORTED_TYPES = [ClassBrowsers.JS_SOURCE]
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20
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21 _modules = {} # cache of modules we've seen
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22
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23
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24 class VisibilityMixin(ClbrBaseClasses.ClbrVisibilityMixinBase):
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25 """
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26 Mixin class implementing the notion of visibility.
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27 """
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28 def __init__(self):
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29 """
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30 Method to initialize the visibility.
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31 """
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32 if self.name.startswith('__'):
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33 self.setPrivate()
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34 elif self.name.startswith('_'):
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35 self.setProtected()
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36 else:
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37 self.setPublic()
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38
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39
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40 class Function(ClbrBaseClasses.Function, VisibilityMixin):
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41 """
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42 Class to represent a Python function.
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43 """
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44 def __init__(self, module, name, file, lineno, signature='',
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45 separator=','):
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46 """
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47 Constructor
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48
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49 @param module name of the module containing this function
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50 @param name name of this function
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51 @param file filename containing this class
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52 @param lineno linenumber of the class definition
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53 @param signature parameterlist of the method
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54 @param separator string separating the parameters
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55 """
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56 ClbrBaseClasses.Function.__init__(self, module, name, file, lineno,
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57 signature, separator)
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58 VisibilityMixin.__init__(self)
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59
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60
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61 class Attribute(ClbrBaseClasses.Attribute, VisibilityMixin):
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62 """
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63 Class to represent a class attribute.
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64 """
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65 def __init__(self, module, name, file, lineno):
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66 """
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67 Constructor
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68
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69 @param module name of the module containing this class
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70 @param name name of this class
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71 @param file filename containing this attribute
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72 @param lineno linenumber of the class definition
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73 """
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74 ClbrBaseClasses.Attribute.__init__(self, module, name, file, lineno)
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75 VisibilityMixin.__init__(self)
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76
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77
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78 class Visitor(object):
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79 """
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80 Class implementing a visitor going through the parsed tree.
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81 """
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82 def __init__(self, src, module, filename):
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83 """
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84 Constructor
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85
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86 @param src source to be parsed (string)
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87 @param module name of the module (string)
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88 @param filename file name (string)
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89 """
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90 self.__dict = {}
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91 self.__dict_counts = {}
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92 self.__root = None
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93 self.__stack = []
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94
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95 self.__source = src
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96 self.__module = module
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97 self.__file = filename
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98
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99 def parse(self):
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100 """
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101 Public method to parse the source.
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102
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103 @return dictionary containing the parsed information
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104 """
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105 try:
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106 self.__root = jsParser.parse(self.__source)
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107 self.__visit(self.__root)
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108 except jsParser.SyntaxError:
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109 # ignore syntax errors of the parser
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110 pass
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111 except jsTokenizer.ParseError:
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112 # ignore syntax errors of the tokenizer
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113 pass
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114
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115 return self.__dict
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116
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117 def __visit(self, root):
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118 """
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119 Private method implementing the visit logic delegating to interesting
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120 methods.
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121
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122 @param root root node to visit
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123 """
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124 call = lambda n: getattr(self, "visit_{0}".format(n.type),
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125 self.visit_noop)(n)
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126 call(root)
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127 for node in root:
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128 self.__visit(node)
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129
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130 def visit_noop(self, node):
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131 """
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132 Public method to ignore the given node.
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133
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134 @param node reference to the node (jasy.js.parse.Node.Node)
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135 """
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parents:
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136 pass
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137
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138 def visit_function(self, node):
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139 """
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parents:
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140 Public method to treat a function node.
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141
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142 @param node reference to the node (jasy.js.parse.Node.Node)
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143 """
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144 if node.type == "function" and \
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145 getattr(node, "name", None) and \
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146 node.functionForm == "declared_form":
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147 if self.__stack and self.__stack[-1].endlineno < node.line:
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148 del self.__stack[-1]
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149 endline = node.line + self.__source.count(
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150 '\n', node.start, node.end)
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151 if getattr(node, "params", None):
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152 func_sig = ", ".join([p.value for p in node.params])
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153 else:
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154 func_sig = ""
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155 if self.__stack:
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156 # it's a nested function
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157 cur_func = self.__stack[-1]
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158 f = Function(None, node.name,
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159 self.__file, node.line, func_sig)
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160 f.setEndLine(endline)
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161 cur_func._addmethod(node.name, f)
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162 else:
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163 f = Function(self.__module, node.name,
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164 self.__file, node.line, func_sig)
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165 f.setEndLine(endline)
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parents:
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166 func_name = node.name
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167 if func_name in self.__dict_counts:
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parents:
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168 self.__dict_counts[func_name] += 1
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169 func_name = "{0}_{1:d}".format(
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170 func_name, self.__dict_counts[func_name])
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171 else:
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172 self.__dict_counts[func_name] = 0
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173 self.__dict[func_name] = f
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174 self.__stack.append(f)
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175
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176 def visit_property_init(self, node):
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177 """
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178 Public method to treat a property_init node.
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179
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180 @param node reference to the node (jasy.js.parse.Node.Node)
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181 """
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parents:
diff changeset
182 if node.type == "property_init" and node[1].type == "function":
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183 if self.__stack and self.__stack[-1].endlineno < node[0].line:
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parents:
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184 del self.__stack[-1]
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185 endline = node[0].line + self.__source.count(
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186 '\n', node.start, node[1].end)
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187 if getattr(node[1], "params", None):
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188 func_sig = ", ".join([p.value for p in node[1].params])
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parents:
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189 else:
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190 func_sig = ""
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parents:
diff changeset
191 if self.__stack:
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parents:
diff changeset
192 # it's a nested function
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parents:
diff changeset
193 cur_func = self.__stack[-1]
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parents:
diff changeset
194 f = Function(None, node[0].value,
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parents:
diff changeset
195 self.__file, node[0].line, func_sig)
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parents:
diff changeset
196 f.setEndLine(endline)
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parents:
diff changeset
197 cur_func._addmethod(node[0].value, f)
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parents:
diff changeset
198 else:
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parents:
diff changeset
199 f = Function(self.__module, node[0].value,
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diff changeset
200 self.__file, node[0].line, func_sig)
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parents:
diff changeset
201 f.setEndLine(endline)
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parents:
diff changeset
202 func_name = node[0].value
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parents:
diff changeset
203 if func_name in self.__dict_counts:
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parents:
diff changeset
204 self.__dict_counts[func_name] += 1
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parents:
diff changeset
205 func_name = "{0}_{1:d}".format(
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parents:
diff changeset
206 func_name, self.__dict_counts[func_name])
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parents:
diff changeset
207 else:
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parents:
diff changeset
208 self.__dict_counts[func_name] = 0
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parents:
diff changeset
209 self.__dict[func_name] = f
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diff changeset
210 self.__stack.append(f)
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211
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parents:
diff changeset
212 def visit_var(self, node):
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parents:
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213 """
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parents:
diff changeset
214 Public method to treat a variable node.
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215
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diff changeset
216 @param node reference to the node (jasy.js.parse.Node.Node)
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parents:
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217 """
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parents:
diff changeset
218 if node.type == "var" and \
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parents:
diff changeset
219 node.parent.type == "script" and \
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parents:
diff changeset
220 node.getChildrenLength():
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parents:
diff changeset
221 if self.__stack and self.__stack[-1].endlineno < node[0].line:
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parents:
diff changeset
222 del self.__stack[-1]
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parents:
diff changeset
223 if self.__stack:
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parents:
diff changeset
224 # function variables
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diff changeset
225 for var in node:
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226 attr = Attribute(
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2965
diff changeset
227 self.__module, var.name, self.__file, var.line)
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228 self.__stack[-1]._addattribute(attr)
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229 else:
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parents:
diff changeset
230 # global variable
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parents:
diff changeset
231 if "@@Globals@@" not in self.__dict:
2997
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2965
diff changeset
232 self.__dict["@@Globals@@"] = ClbrBaseClasses.ClbrBase(
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parents: 2965
diff changeset
233 self.__module, "Globals", self.__file, 0)
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parents:
diff changeset
234 for var in node:
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diff changeset
235 self.__dict["@@Globals@@"]._addglobal(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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237
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parents:
diff changeset
238 def visit_const(self, node):
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parents:
diff changeset
239 """
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parents:
diff changeset
240 Public method to treat a constant node.
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parents:
diff changeset
241
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parents:
diff changeset
242 @param node reference to the node (jasy.js.parse.Node.Node)
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parents:
diff changeset
243 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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244 if node.type == "const" and \
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245 node.parent.type == "script" and \
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246 node.getChildrenLength():
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247 if self.__stack and self.__stack[-1].endlineno < node[0].line:
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248 del self.__stack[-1]
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249 if self.__stack:
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250 # function variables
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251 for var in node:
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252 attr = Attribute(self.__module, "const " + var.name,
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253 self.__file, var.line)
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254 self.__stack[-1]._addattribute(attr)
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255 else:
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256 # global variable
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257 if "@@Globals@@" not in self.__dict:
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258 self.__dict["@@Globals@@"] = ClbrBaseClasses.ClbrBase(
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259 self.__module, "Globals", self.__file, 0)
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260 for var in node:
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261 self.__dict["@@Globals@@"]._addglobal(
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262 Attribute(self.__module, "const " + var.name,
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263 self.__file, var.line))
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264
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265
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266 def readmodule_ex(module, path=[]):
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267 """
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268 Read a JavaScript file and return a dictionary of functions and variables.
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269
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270 @param module name of the JavaScript file (string)
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271 @param path path the file should be searched in (list of strings)
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272 @return the resulting dictionary
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273 """
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274 global _modules
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275
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276 dict = {}
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277
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278 if module in _modules:
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279 # we've seen this file before...
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280 return _modules[module]
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281
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282 # search the path for the file
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283 f = None
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284 fullpath = list(path)
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285 f, file, (suff, mode, type) = ClassBrowsers.find_module(module, fullpath)
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286 if f:
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287 f.close()
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288 if type not in SUPPORTED_TYPES:
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289 # not CORBA IDL source, can't do anything with this module
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290 _modules[module] = dict
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291 return dict
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292
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293 _modules[module] = dict
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294 try:
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295 src = Utilities.readEncodedFile(file)[0]
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296 except (UnicodeError, IOError):
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297 # can't do anything with this module
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298 _modules[module] = dict
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299 return dict
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300
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301 visitor = Visitor(src, module, file)
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302 dict = visitor.parse()
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303 _modules[module] = dict
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304 return dict

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