Mercurial > genshi > genshi-test
annotate genshi/template/eval.py @ 684:2a52ea05fe9f
Fix one Python 2.3 compatibility in the expression evaluation code. See #177. One more to go, though.
author | cmlenz |
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date | Wed, 13 Feb 2008 17:06:19 +0000 |
parents | 75795aadf920 |
children | be6890ff84fe 3a4f2fd6f5e2 |
rev | line source |
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1 # -*- coding: utf-8 -*- |
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2 # |
408 | 3 # Copyright (C) 2006-2007 Edgewall Software |
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4 # All rights reserved. |
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5 # |
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6 # This software is licensed as described in the file COPYING, which |
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7 # you should have received as part of this distribution. The terms |
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8 # are also available at http://genshi.edgewall.org/wiki/License. |
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9 # |
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10 # This software consists of voluntary contributions made by many |
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11 # individuals. For the exact contribution history, see the revision |
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12 # history and logs, available at http://genshi.edgewall.org/log/. |
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13 |
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14 """Support for "safe" evaluation of Python expressions.""" |
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15 |
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16 import __builtin__ |
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17 from compiler import ast, parse |
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18 from compiler.pycodegen import ExpressionCodeGenerator, ModuleCodeGenerator |
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19 import new |
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20 try: |
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21 set |
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22 except NameError: |
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23 from sets import ImmutableSet as frozenset |
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24 from sets import Set as set |
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25 import sys |
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26 from textwrap import dedent |
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27 |
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28 from genshi.core import Markup |
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29 from genshi.template.base import TemplateRuntimeError |
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30 from genshi.util import flatten |
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31 |
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32 __all__ = ['Code', 'Expression', 'Suite', 'LenientLookup', 'StrictLookup', |
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33 'Undefined', 'UndefinedError'] |
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34 __docformat__ = 'restructuredtext en' |
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35 |
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36 |
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37 class Code(object): |
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38 """Abstract base class for the `Expression` and `Suite` classes.""" |
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39 __slots__ = ['source', 'code', 'ast', '_globals'] |
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40 |
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41 def __init__(self, source, filename=None, lineno=-1, lookup='strict', |
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42 xform=None): |
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43 """Create the code object, either from a string, or from an AST node. |
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44 |
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45 :param source: either a string containing the source code, or an AST |
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46 node |
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47 :param filename: the (preferably absolute) name of the file containing |
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48 the code |
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49 :param lineno: the number of the line on which the code was found |
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50 :param lookup: the lookup class that defines how variables are looked |
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51 up in the context; can be either "strict" (the default), |
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52 "lenient", or a custom lookup class |
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53 :param xform: the AST transformer that should be applied to the code; |
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54 if `None`, the appropriate transformation is chosen |
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55 depending on the mode |
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56 """ |
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57 if isinstance(source, basestring): |
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58 self.source = source |
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59 node = _parse(source, mode=self.mode) |
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60 else: |
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61 assert isinstance(source, ast.Node), \ |
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62 'Expected string or AST node, but got %r' % source |
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63 self.source = '?' |
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64 if self.mode == 'eval': |
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65 node = ast.Expression(source) |
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66 else: |
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67 node = ast.Module(None, source) |
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68 |
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69 self.ast = node |
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70 self.code = _compile(node, self.source, mode=self.mode, |
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71 filename=filename, lineno=lineno, xform=xform) |
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72 if lookup is None: |
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73 lookup = LenientLookup |
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74 elif isinstance(lookup, basestring): |
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75 lookup = {'lenient': LenientLookup, 'strict': StrictLookup}[lookup] |
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76 self._globals = lookup.globals |
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77 |
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78 def __eq__(self, other): |
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79 return (type(other) == type(self)) and (self.code == other.code) |
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80 |
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81 def __hash__(self): |
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82 return hash(self.code) |
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83 |
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84 def __ne__(self, other): |
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85 return not self == other |
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86 |
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87 def __repr__(self): |
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88 return '%s(%r)' % (self.__class__.__name__, self.source) |
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89 |
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90 |
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91 class Expression(Code): |
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92 """Evaluates Python expressions used in templates. |
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93 |
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94 >>> data = dict(test='Foo', items=[1, 2, 3], dict={'some': 'thing'}) |
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95 >>> Expression('test').evaluate(data) |
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96 'Foo' |
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97 |
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98 >>> Expression('items[0]').evaluate(data) |
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99 1 |
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100 >>> Expression('items[-1]').evaluate(data) |
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101 3 |
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102 >>> Expression('dict["some"]').evaluate(data) |
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103 'thing' |
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104 |
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105 Similar to e.g. Javascript, expressions in templates can use the dot |
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106 notation for attribute access to access items in mappings: |
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107 |
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108 >>> Expression('dict.some').evaluate(data) |
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109 'thing' |
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110 |
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111 This also works the other way around: item access can be used to access |
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112 any object attribute: |
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113 |
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114 >>> class MyClass(object): |
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115 ... myattr = 'Bar' |
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116 >>> data = dict(mine=MyClass(), key='myattr') |
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117 >>> Expression('mine.myattr').evaluate(data) |
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118 'Bar' |
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119 >>> Expression('mine["myattr"]').evaluate(data) |
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120 'Bar' |
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121 >>> Expression('mine[key]').evaluate(data) |
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122 'Bar' |
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123 |
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124 All of the standard Python operators are available to template expressions. |
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125 Built-in functions such as ``len()`` are also available in template |
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126 expressions: |
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127 |
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128 >>> data = dict(items=[1, 2, 3]) |
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129 >>> Expression('len(items)').evaluate(data) |
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130 3 |
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131 """ |
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132 __slots__ = [] |
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133 mode = 'eval' |
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134 |
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135 def evaluate(self, data): |
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136 """Evaluate the expression against the given data dictionary. |
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137 |
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138 :param data: a mapping containing the data to evaluate against |
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139 :return: the result of the evaluation |
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140 """ |
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141 __traceback_hide__ = 'before_and_this' |
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142 _globals = self._globals() |
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143 _globals['__data__'] = data |
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144 return eval(self.code, _globals, {'__data__': data}) |
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145 |
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146 |
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147 class Suite(Code): |
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148 """Executes Python statements used in templates. |
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149 |
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150 >>> data = dict(test='Foo', items=[1, 2, 3], dict={'some': 'thing'}) |
473 | 151 >>> Suite("foo = dict['some']").execute(data) |
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152 >>> data['foo'] |
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153 'thing' |
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154 """ |
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155 __slots__ = [] |
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156 mode = 'exec' |
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157 |
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158 def execute(self, data): |
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159 """Execute the suite in the given data dictionary. |
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160 |
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161 :param data: a mapping containing the data to execute in |
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162 """ |
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163 __traceback_hide__ = 'before_and_this' |
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164 _globals = self._globals() |
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165 _globals['__data__'] = data |
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166 exec self.code in _globals, data |
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167 |
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168 |
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169 UNDEFINED = object() |
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170 |
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171 |
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172 class UndefinedError(TemplateRuntimeError): |
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173 """Exception thrown when a template expression attempts to access a variable |
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174 not defined in the context. |
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175 |
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176 :see: `LenientLookup`, `StrictLookup` |
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177 """ |
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178 def __init__(self, name, owner=UNDEFINED): |
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179 if owner is not UNDEFINED: |
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180 message = '%s has no member named "%s"' % (repr(owner), name) |
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181 else: |
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182 message = '"%s" not defined' % name |
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183 TemplateRuntimeError.__init__(self, message) |
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184 |
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185 |
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186 class Undefined(object): |
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187 """Represents a reference to an undefined variable. |
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188 |
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189 Unlike the Python runtime, template expressions can refer to an undefined |
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190 variable without causing a `NameError` to be raised. The result will be an |
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191 instance of the `Undefined` class, which is treated the same as ``False`` in |
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192 conditions, but raise an exception on any other operation: |
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193 |
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194 >>> foo = Undefined('foo') |
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195 >>> bool(foo) |
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196 False |
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197 >>> list(foo) |
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198 [] |
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199 >>> print foo |
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200 undefined |
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201 |
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202 However, calling an undefined variable, or trying to access an attribute |
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203 of that variable, will raise an exception that includes the name used to |
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204 reference that undefined variable. |
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205 |
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206 >>> foo('bar') |
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207 Traceback (most recent call last): |
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208 ... |
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209 UndefinedError: "foo" not defined |
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210 |
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211 >>> foo.bar |
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212 Traceback (most recent call last): |
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213 ... |
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214 UndefinedError: "foo" not defined |
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215 |
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216 :see: `LenientLookup` |
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217 """ |
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218 __slots__ = ['_name', '_owner'] |
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219 |
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220 def __init__(self, name, owner=UNDEFINED): |
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221 """Initialize the object. |
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222 |
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223 :param name: the name of the reference |
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224 :param owner: the owning object, if the variable is accessed as a member |
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225 """ |
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226 self._name = name |
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227 self._owner = owner |
336
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228 |
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229 def __iter__(self): |
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230 return iter([]) |
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231 |
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232 def __nonzero__(self): |
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233 return False |
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234 |
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235 def __repr__(self): |
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236 return '<%s %r>' % (self.__class__.__name__, self._name) |
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237 |
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238 def __str__(self): |
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239 return 'undefined' |
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240 |
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241 def _die(self, *args, **kwargs): |
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242 """Raise an `UndefinedError`.""" |
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243 __traceback_hide__ = True |
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244 raise UndefinedError(self._name, self._owner) |
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245 __call__ = __getattr__ = __getitem__ = _die |
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246 |
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247 |
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248 class LookupBase(object): |
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249 """Abstract base class for variable lookup implementations.""" |
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250 |
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251 def globals(cls): |
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252 """Construct the globals dictionary to use as the execution context for |
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253 the expression or suite. |
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254 """ |
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255 return { |
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256 '_lookup_name': cls.lookup_name, |
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257 '_lookup_attr': cls.lookup_attr, |
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258 '_lookup_item': cls.lookup_item, |
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259 'UndefinedError': UndefinedError |
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260 } |
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261 globals = classmethod(globals) |
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262 |
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263 def lookup_name(cls, data, name): |
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264 __traceback_hide__ = True |
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265 val = data.get(name, UNDEFINED) |
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266 if val is UNDEFINED: |
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267 val = BUILTINS.get(name, val) |
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268 if val is UNDEFINED: |
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269 val = cls.undefined(name) |
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270 return val |
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271 lookup_name = classmethod(lookup_name) |
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272 |
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273 def lookup_attr(cls, data, obj, key): |
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274 __traceback_hide__ = True |
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275 val = getattr(obj, key, UNDEFINED) |
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276 if val is UNDEFINED: |
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277 try: |
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278 val = obj[key] |
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279 except (KeyError, TypeError): |
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280 val = cls.undefined(key, owner=obj) |
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281 return val |
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282 lookup_attr = classmethod(lookup_attr) |
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283 |
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284 def lookup_item(cls, data, obj, key): |
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285 __traceback_hide__ = True |
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286 if len(key) == 1: |
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287 key = key[0] |
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288 try: |
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289 return obj[key] |
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290 except (AttributeError, KeyError, IndexError, TypeError), e: |
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291 if isinstance(key, basestring): |
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292 val = getattr(obj, key, UNDEFINED) |
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293 if val is UNDEFINED: |
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294 val = cls.undefined(key, owner=obj) |
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295 return val |
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296 raise |
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297 lookup_item = classmethod(lookup_item) |
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298 |
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299 def undefined(cls, key, owner=UNDEFINED): |
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300 """Can be overridden by subclasses to specify behavior when undefined |
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301 variables are accessed. |
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302 |
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303 :param key: the name of the variable |
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304 :param owner: the owning object, if the variable is accessed as a member |
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305 """ |
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306 raise NotImplementedError |
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307 undefined = classmethod(undefined) |
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308 |
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309 |
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310 class LenientLookup(LookupBase): |
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311 """Default variable lookup mechanism for expressions. |
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312 |
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313 When an undefined variable is referenced using this lookup style, the |
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314 reference evaluates to an instance of the `Undefined` class: |
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315 |
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316 >>> expr = Expression('nothing', lookup='lenient') |
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317 >>> undef = expr.evaluate({}) |
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318 >>> undef |
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319 <Undefined 'nothing'> |
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320 |
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321 The same will happen when a non-existing attribute or item is accessed on |
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322 an existing object: |
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323 |
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324 >>> expr = Expression('something.nil', lookup='lenient') |
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325 >>> expr.evaluate({'something': dict()}) |
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326 <Undefined 'nil'> |
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327 |
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328 See the documentation of the `Undefined` class for details on the behavior |
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329 of such objects. |
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330 |
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331 :see: `StrictLookup` |
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332 """ |
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333 def undefined(cls, key, owner=UNDEFINED): |
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334 """Return an ``Undefined`` object.""" |
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335 __traceback_hide__ = True |
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336 return Undefined(key, owner=owner) |
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337 undefined = classmethod(undefined) |
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338 |
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339 |
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340 class StrictLookup(LookupBase): |
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341 """Strict variable lookup mechanism for expressions. |
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342 |
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343 Referencing an undefined variable using this lookup style will immediately |
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344 raise an ``UndefinedError``: |
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345 |
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346 >>> expr = Expression('nothing', lookup='strict') |
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347 >>> expr.evaluate({}) |
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348 Traceback (most recent call last): |
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349 ... |
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350 UndefinedError: "nothing" not defined |
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351 |
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352 The same happens when a non-existing attribute or item is accessed on an |
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353 existing object: |
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354 |
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355 >>> expr = Expression('something.nil', lookup='strict') |
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356 >>> expr.evaluate({'something': dict()}) |
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357 Traceback (most recent call last): |
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358 ... |
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359 UndefinedError: {} has no member named "nil" |
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360 """ |
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361 def undefined(cls, key, owner=UNDEFINED): |
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362 """Raise an ``UndefinedError`` immediately.""" |
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363 __traceback_hide__ = True |
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364 raise UndefinedError(key, owner=owner) |
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365 undefined = classmethod(undefined) |
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366 |
336
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367 |
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368 def _parse(source, mode='eval'): |
601
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369 source = source.strip() |
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370 if mode == 'exec': |
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371 lines = [line.expandtabs() for line in source.splitlines()] |
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372 first = lines[0] |
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373 rest = dedent('\n'.join(lines[1:])).rstrip() |
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374 if first.rstrip().endswith(':') and not rest[0].isspace(): |
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375 rest = '\n'.join([' %s' % line for line in rest.splitlines()]) |
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376 source = '\n'.join([first, rest]) |
336
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377 if isinstance(source, unicode): |
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378 source = '\xef\xbb\xbf' + source.encode('utf-8') |
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379 return parse(source, mode) |
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380 |
604
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381 def _compile(node, source=None, mode='eval', filename=None, lineno=-1, |
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382 xform=None): |
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383 if xform is None: |
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384 xform = {'eval': ExpressionASTTransformer}.get(mode, |
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385 TemplateASTTransformer) |
473 | 386 tree = xform().visit(node) |
336
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387 if isinstance(filename, unicode): |
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388 # unicode file names not allowed for code objects |
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389 filename = filename.encode('utf-8', 'replace') |
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390 elif not filename: |
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391 filename = '<string>' |
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392 tree.filename = filename |
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393 if lineno <= 0: |
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394 lineno = 1 |
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395 |
405
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396 if mode == 'eval': |
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397 gen = ExpressionCodeGenerator(tree) |
601
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398 name = '<Expression %r>' % (source or '?') |
405
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399 else: |
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400 gen = ModuleCodeGenerator(tree) |
601
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401 lines = source.splitlines() |
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402 extract = lines[0] |
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403 if len(lines) > 1: |
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404 extract += ' ...' |
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405 name = '<Suite %r>' % (extract) |
336
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406 gen.optimized = True |
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407 code = gen.getCode() |
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408 |
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409 # We'd like to just set co_firstlineno, but it's readonly. So we need to |
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410 # clone the code object while adjusting the line number |
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411 return new.code(0, code.co_nlocals, code.co_stacksize, |
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412 code.co_flags | 0x0040, code.co_code, code.co_consts, |
405
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413 code.co_names, code.co_varnames, filename, name, lineno, |
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414 code.co_lnotab, (), ()) |
336
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415 |
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416 BUILTINS = __builtin__.__dict__.copy() |
442
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417 BUILTINS.update({'Markup': Markup, 'Undefined': Undefined}) |
563
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418 CONSTANTS = frozenset(['False', 'True', 'None', 'NotImplemented', 'Ellipsis']) |
336
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419 |
564
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420 |
336
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421 class ASTTransformer(object): |
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422 """General purpose base class for AST transformations. |
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423 |
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424 Every visitor method can be overridden to return an AST node that has been |
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425 altered or replaced in some way. |
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426 """ |
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427 |
357
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428 def visit(self, node): |
405
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429 if node is None: |
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430 return None |
473 | 431 if type(node) is tuple: |
432 return tuple([self.visit(n) for n in node]) | |
433 visitor = getattr(self, 'visit%s' % node.__class__.__name__, | |
434 self._visitDefault) | |
435 return visitor(node) | |
405
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436 |
565
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437 def _clone(self, node, *args): |
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438 lineno = getattr(node, 'lineno', None) |
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439 node = node.__class__(*args) |
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440 if lineno is not None: |
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441 node.lineno = lineno |
684
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442 if isinstance(node, (ast.Class, ast.Function, ast.Lambda)) or \ |
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Fix one Python 2.3 compatibility in the expression evaluation code. See #177. One more to go, though.
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443 sys.version_info > (2, 4) and isinstance(node, ast.GenExpr): |
565
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444 node.filename = '<string>' # workaround for bug in pycodegen |
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445 return node |
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446 |
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447 def _visitDefault(self, node): |
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448 return node |
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449 |
357
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450 def visitExpression(self, node): |
565
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451 return self._clone(node, self.visit(node.node)) |
336
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452 |
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453 def visitModule(self, node): |
565
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454 return self._clone(node, node.doc, self.visit(node.node)) |
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455 |
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456 def visitStmt(self, node): |
565
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457 return self._clone(node, [self.visit(x) for x in node.nodes]) |
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458 |
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459 # Classes, Functions & Accessors |
336
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460 |
357
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461 def visitCallFunc(self, node): |
565
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462 return self._clone(node, self.visit(node.node), |
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463 [self.visit(x) for x in node.args], |
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464 node.star_args and self.visit(node.star_args) or None, |
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465 node.dstar_args and self.visit(node.dstar_args) or None |
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466 ) |
336
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467 |
405
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468 def visitClass(self, node): |
565
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469 return self._clone(node, node.name, [self.visit(x) for x in node.bases], |
568
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AST transformer needs to also handle the class body.
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470 node.doc, self.visit(node.code) |
565
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471 ) |
405
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472 |
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473 def visitFunction(self, node): |
565
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474 args = [] |
405
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475 if hasattr(node, 'decorators'): |
565
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476 args.append(self.visit(node.decorators)) |
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477 return self._clone(node, *args + [ |
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478 node.name, |
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479 node.argnames, |
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480 [self.visit(x) for x in node.defaults], |
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481 node.flags, |
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482 node.doc, |
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483 self.visit(node.code) |
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484 ]) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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|
485 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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486 def visitGetattr(self, node): |
565
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487 return self._clone(node, self.visit(node.expr), node.attrname) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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changeset
|
488 |
405
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489 def visitLambda(self, node): |
565
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490 node = self._clone(node, node.argnames, |
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491 [self.visit(x) for x in node.defaults], node.flags, |
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492 self.visit(node.code) |
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|
493 ) |
405
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494 return node |
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|
495 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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496 def visitSubscript(self, node): |
565
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497 return self._clone(node, self.visit(node.expr), node.flags, |
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498 [self.visit(x) for x in node.subs] |
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|
499 ) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
500 |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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|
501 # Statements |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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|
502 |
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|
503 def visitAssert(self, node): |
565
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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504 return self._clone(node, self.visit(node.test), self.visit(node.fail)) |
405
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diff
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|
505 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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|
506 def visitAssign(self, node): |
565
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507 return self._clone(node, [self.visit(x) for x in node.nodes], |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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508 self.visit(node.expr) |
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changeset
|
509 ) |
405
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|
510 |
473 | 511 def visitAssAttr(self, node): |
565
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|
512 return self._clone(node, self.visit(node.expr), node.attrname, |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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513 node.flags |
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|
514 ) |
473 | 515 |
516 def visitAugAssign(self, node): | |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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diff
changeset
|
517 return self._clone(node, self.visit(node.node), node.op, |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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518 self.visit(node.expr) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
519 ) |
473 | 520 |
405
bd5da099c113
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|
521 def visitDecorators(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
522 return self._clone(node, [self.visit(x) for x in node.nodes]) |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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|
523 |
473 | 524 def visitExec(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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564
diff
changeset
|
525 return self._clone(node, self.visit(node.expr), self.visit(node.locals), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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564
diff
changeset
|
526 self.visit(node.globals) |
aa8e85a4085e
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|
527 ) |
473 | 528 |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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|
529 def visitFor(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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changeset
|
530 return self._clone(node, self.visit(node.assign), self.visit(node.list), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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diff
changeset
|
531 self.visit(node.body), self.visit(node.else_) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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changeset
|
532 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
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diff
changeset
|
533 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
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diff
changeset
|
534 def visitIf(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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changeset
|
535 return self._clone(node, [self.visit(x) for x in node.tests], |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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changeset
|
536 self.visit(node.else_) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
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diff
changeset
|
537 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
538 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
539 def _visitPrint(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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changeset
|
540 return self._clone(node, [self.visit(x) for x in node.nodes], |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
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diff
changeset
|
541 self.visit(node.dest) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
542 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
543 visitPrint = visitPrintnl = _visitPrint |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
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diff
changeset
|
544 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
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diff
changeset
|
545 def visitRaise(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
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changeset
|
546 return self._clone(node, self.visit(node.expr1), self.visit(node.expr2), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
547 self.visit(node.expr3) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
548 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
549 |
473 | 550 def visitReturn(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
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diff
changeset
|
551 return self._clone(node, self.visit(node.value)) |
473 | 552 |
405
bd5da099c113
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parents:
401
diff
changeset
|
553 def visitTryExcept(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
554 return self._clone(node, self.visit(node.body), self.visit(node.handlers), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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diff
changeset
|
555 self.visit(node.else_) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
556 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
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|
557 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
558 def visitTryFinally(self, node): |
565
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cmlenz
parents:
564
diff
changeset
|
559 return self._clone(node, self.visit(node.body), self.visit(node.final)) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
560 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
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|
561 def visitWhile(self, node): |
565
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
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|
562 return self._clone(node, self.visit(node.test), self.visit(node.body), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
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|
563 self.visit(node.else_) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
564 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
565 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
566 def visitWith(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
567 return self._clone(node, self.visit(node.expr), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
568 [self.visit(x) for x in node.vars], self.visit(node.body) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
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|
569 ) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
570 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
571 def visitYield(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
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|
572 return self._clone(node, self.visit(node.value)) |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
573 |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
574 # Operators |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
575 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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parents:
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diff
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|
576 def _visitBoolOp(self, node): |
565
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
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|
577 return self._clone(node, [self.visit(x) for x in node.nodes]) |
396 | 578 visitAnd = visitOr = visitBitand = visitBitor = visitBitxor = _visitBoolOp |
473 | 579 visitAssTuple = visitAssList = _visitBoolOp |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
580 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
581 def _visitBinOp(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
582 return self._clone(node, |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
583 (self.visit(node.left), self.visit(node.right)) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
584 ) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
585 visitAdd = visitSub = _visitBinOp |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
586 visitDiv = visitFloorDiv = visitMod = visitMul = visitPower = _visitBinOp |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
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|
587 visitLeftShift = visitRightShift = _visitBinOp |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
588 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
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|
589 def visitCompare(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
590 return self._clone(node, self.visit(node.expr), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
591 [(op, self.visit(n)) for op, n in node.ops] |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
592 ) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
593 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
594 def _visitUnaryOp(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
595 return self._clone(node, self.visit(node.expr)) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
596 visitUnaryAdd = visitUnarySub = visitNot = visitInvert = _visitUnaryOp |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
597 visitBackquote = visitDiscard = _visitUnaryOp |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
598 |
393
a056613621ab
add support for Python 2.5 conditional expressions (fixes #74)
mgood
parents:
382
diff
changeset
|
599 def visitIfExp(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
600 return self._clone(node, self.visit(node.test), self.visit(node.then), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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parents:
564
diff
changeset
|
601 self.visit(node.else_) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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parents:
564
diff
changeset
|
602 ) |
393
a056613621ab
add support for Python 2.5 conditional expressions (fixes #74)
mgood
parents:
382
diff
changeset
|
603 |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
604 # Identifiers, Literals and Comprehensions |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
605 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
606 def visitDict(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
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|
607 return self._clone(node, |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
608 [(self.visit(k), self.visit(v)) for k, v in node.items] |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
609 ) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
610 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
611 def visitGenExpr(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
612 return self._clone(node, self.visit(node.code)) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
613 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
614 def visitGenExprFor(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
615 return self._clone(node, self.visit(node.assign), self.visit(node.iter), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
616 [self.visit(x) for x in node.ifs] |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
617 ) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
618 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
619 def visitGenExprIf(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
620 return self._clone(node, self.visit(node.test)) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
621 |
357
c5684b65c9b7
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cmlenz
parents:
343
diff
changeset
|
622 def visitGenExprInner(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
623 quals = [self.visit(x) for x in node.quals] |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
624 return self._clone(node, self.visit(node.expr), quals) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
625 |
357
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cmlenz
parents:
343
diff
changeset
|
626 def visitKeyword(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
627 return self._clone(node, node.name, self.visit(node.expr)) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
628 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
629 def visitList(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
630 return self._clone(node, [self.visit(n) for n in node.nodes]) |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
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changeset
|
631 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
632 def visitListComp(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
633 quals = [self.visit(x) for x in node.quals] |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
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|
634 return self._clone(node, self.visit(node.expr), quals) |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
635 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
636 def visitListCompFor(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
637 return self._clone(node, self.visit(node.assign), self.visit(node.list), |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
638 [self.visit(x) for x in node.ifs] |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
639 ) |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
640 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
641 def visitListCompIf(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
642 return self._clone(node, self.visit(node.test)) |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
643 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
644 def visitSlice(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
645 return self._clone(node, self.visit(node.expr), node.flags, |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
646 node.lower and self.visit(node.lower) or None, |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
647 node.upper and self.visit(node.upper) or None |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
648 ) |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
649 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
650 def visitSliceobj(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
651 return self._clone(node, [self.visit(x) for x in node.nodes]) |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
652 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
653 def visitTuple(self, node): |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
654 return self._clone(node, [self.visit(n) for n in node.nodes]) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
655 |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
656 |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
657 class TemplateASTTransformer(ASTTransformer): |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
658 """Concrete AST transformer that implements the AST transformations needed |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
659 for code embedded in templates. |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
660 """ |
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
661 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
662 def __init__(self): |
586
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
663 self.locals = [CONSTANTS] |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
664 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
665 def visitConst(self, node): |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
666 if isinstance(node.value, str): |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
667 try: # If the string is ASCII, return a `str` object |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
668 node.value.decode('ascii') |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
669 except ValueError: # Otherwise return a `unicode` object |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
670 return ast.Const(node.value.decode('utf-8')) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
671 return node |
5f2c7782cd8a
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672 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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673 def visitAssName(self, node): |
586
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Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
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674 if len(self.locals) > 1: |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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675 self.locals[-1].add(node.name) |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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676 return node |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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677 |
473 | 678 def visitAugAssign(self, node): |
579
71e3205925e6
Fix for augmented assignments to local variables. Thanks to Erik Bray for reporting the problem.
cmlenz
parents:
569
diff
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679 if isinstance(node.node, ast.Name) \ |
582
b21da79c9bde
Follow-up fix to [693:694]. Again, thanks to Erik Bray for reporting.
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579
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680 and node.node.name not in flatten(self.locals): |
473 | 681 name = node.node.name |
682
75795aadf920
Assigning to a variable named `data` in a Python code block no longer breaks context lookup. We now use the name `__data__` for internal data, hoping that that name is not as commonly used in templates.
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682 node.node = ast.Subscript(ast.Name('__data__'), 'OP_APPLY', |
473 | 683 [ast.Const(name)]) |
684 node.expr = self.visit(node.expr) | |
685 return ast.If([ | |
682
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Assigning to a variable named `data` in a Python code block no longer breaks context lookup. We now use the name `__data__` for internal data, hoping that that name is not as commonly used in templates.
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686 (ast.Compare(ast.Const(name), [('in', ast.Name('__data__'))]), |
473 | 687 ast.Stmt([node]))], |
688 ast.Stmt([ast.Raise(ast.CallFunc(ast.Name('UndefinedError'), | |
689 [ast.Const(name)]), | |
690 None, None)])) | |
691 else: | |
692 return ASTTransformer.visitAugAssign(self, node) | |
693 | |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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694 def visitClass(self, node): |
586
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Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
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|
695 if len(self.locals) > 1: |
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
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696 self.locals[-1].add(node.name) |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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697 self.locals.append(set()) |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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698 try: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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diff
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|
699 return ASTTransformer.visitClass(self, node) |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
700 finally: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
701 self.locals.pop() |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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diff
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702 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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703 def visitFor(self, node): |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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704 self.locals.append(set()) |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
705 try: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
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diff
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|
706 return ASTTransformer.visitFor(self, node) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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parents:
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diff
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|
707 finally: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
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564
diff
changeset
|
708 self.locals.pop() |
405
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
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diff
changeset
|
709 |
bd5da099c113
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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diff
changeset
|
710 def visitFunction(self, node): |
586
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Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
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|
711 if len(self.locals) > 1: |
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
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diff
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|
712 self.locals[-1].add(node.name) |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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|
713 self.locals.append(set(node.argnames)) |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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diff
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|
714 try: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
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|
715 return ASTTransformer.visitFunction(self, node) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
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diff
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|
716 finally: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
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diff
changeset
|
717 self.locals.pop() |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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parents:
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changeset
|
718 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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parents:
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diff
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719 def visitGenExpr(self, node): |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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720 self.locals.append(set()) |
565
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
721 try: |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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722 return ASTTransformer.visitGenExpr(self, node) |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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|
723 finally: |
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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diff
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|
724 self.locals.pop() |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
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|
725 |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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726 def visitLambda(self, node): |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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727 self.locals.append(set(flatten(node.argnames))) |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
728 try: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
729 return ASTTransformer.visitLambda(self, node) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
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diff
changeset
|
730 finally: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
731 self.locals.pop() |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
732 |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
733 def visitListComp(self, node): |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
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734 self.locals.append(set()) |
565
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
735 try: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
736 return ASTTransformer.visitListComp(self, node) |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
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diff
changeset
|
737 finally: |
aa8e85a4085e
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
738 self.locals.pop() |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
739 |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
740 def visitName(self, node): |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
741 # If the name refers to a local inside a lambda, list comprehension, or |
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
742 # generator expression, leave it alone |
586
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
743 if node.name not in flatten(self.locals): |
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
744 # Otherwise, translate the name ref into a context lookup |
682
75795aadf920
Assigning to a variable named `data` in a Python code block no longer breaks context lookup. We now use the name `__data__` for internal data, hoping that that name is not as commonly used in templates.
cmlenz
parents:
654
diff
changeset
|
745 func_args = [ast.Name('__data__'), ast.Const(node.name)] |
586
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
746 node = ast.CallFunc(ast.Name('_lookup_name'), func_args) |
5413c9d95db1
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
747 return node |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
748 |
473 | 749 |
750 class ExpressionASTTransformer(TemplateASTTransformer): | |
751 """Concrete AST transformer that implements the AST transformations needed | |
752 for code embedded in templates. | |
753 """ | |
754 | |
755 def visitGetattr(self, node): | |
756 return ast.CallFunc(ast.Name('_lookup_attr'), [ | |
682
75795aadf920
Assigning to a variable named `data` in a Python code block no longer breaks context lookup. We now use the name `__data__` for internal data, hoping that that name is not as commonly used in templates.
cmlenz
parents:
654
diff
changeset
|
757 ast.Name('__data__'), self.visit(node.expr), |
473 | 758 ast.Const(node.attrname) |
759 ]) | |
760 | |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
761 def visitSubscript(self, node): |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
762 return ast.CallFunc(ast.Name('_lookup_item'), [ |
682
75795aadf920
Assigning to a variable named `data` in a Python code block no longer breaks context lookup. We now use the name `__data__` for internal data, hoping that that name is not as commonly used in templates.
cmlenz
parents:
654
diff
changeset
|
763 ast.Name('__data__'), self.visit(node.expr), |
357
c5684b65c9b7
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
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diff
changeset
|
764 ast.Tuple([self.visit(sub) for sub in node.subs]) |
336
5f2c7782cd8a
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
765 ]) |