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annotate roundup/cgi/TAL/DummyEngine.py @ 5381:0942fe89e82e

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Python 3 preparation: change "x.has_key(y)" to "y in x". (Also likewise "not in" where appropriate.) Tool-generated patch.
author Joseph Myers <jsm@polyomino.org.uk>
date Tue, 24 Jul 2018 22:08:17 +0000
parents 12fe83f90f0d
children d26921b851c3
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1 ##############################################################################
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2 #
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3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the Zope Public License,
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7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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11 # FOR A PARTICULAR PURPOSE.
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12 #
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13 ##############################################################################
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14 # Modifications for Roundup:
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15 # 1. commented out ITALES references
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16 # 2. implemented ustr as str
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17 """
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18 Dummy TALES engine so that I can test out the TAL implementation.
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19 """
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20
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21 import re
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22 import sys
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23
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24 from TALDefs import NAME_RE, TALESError, ErrorInfo
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25 #from ITALES import ITALESCompiler, ITALESEngine
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26 #from DocumentTemplate.DT_Util import ustr
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27 ustr = str
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28
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29 IDomain = None
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30 if 'Zope' in sys.modules:
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31 try:
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32 from Zope.I18n.ITranslationService import ITranslationService
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33 from Zope.I18n.IDomain import IDomain
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34 except ImportError:
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35 pass
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36 if IDomain is None:
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37 # Before 2.7, or not in Zope
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38 class ITranslationService: pass
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39 class IDomain: pass
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40
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41 class _Default:
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42 pass
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43 Default = _Default()
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44
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45 name_match = re.compile(r"(?s)(%s):(.*)\Z" % NAME_RE).match
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46
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47 class CompilerError(BaseException):
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48 pass
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49
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50 class DummyEngine:
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51
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52 position = None
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53 source_file = None
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54
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55 #__implements__ = ITALESCompiler, ITALESEngine
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56
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57 def __init__(self, macros=None):
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58 if macros is None:
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59 macros = {}
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60 self.macros = macros
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61 dict = {'nothing': None, 'default': Default}
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62 self.locals = self.globals = dict
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63 self.stack = [dict]
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64 self.translationService = DummyTranslationService()
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65
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66 def getCompilerError(self):
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67 return CompilerError
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68
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69 def getCompiler(self):
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70 return self
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71
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72 def setSourceFile(self, source_file):
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73 self.source_file = source_file
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74
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75 def setPosition(self, position):
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76 self.position = position
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77
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78 def compile(self, expr):
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79 return "$%s$" % expr
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80
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81 def uncompile(self, expression):
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82 assert expression.startswith("$") and expression.endswith("$"),expression
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83 return expression[1:-1]
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84
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85 def beginScope(self):
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86 self.stack.append(self.locals)
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87
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88 def endScope(self):
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89 assert len(self.stack) > 1, "more endScope() than beginScope() calls"
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90 self.locals = self.stack.pop()
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91
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92 def setLocal(self, name, value):
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93 if self.locals is self.stack[-1]:
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94 # Unmerge this scope's locals from previous scope of first set
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95 self.locals = self.locals.copy()
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96 self.locals[name] = value
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97
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98 def setGlobal(self, name, value):
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99 self.globals[name] = value
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100
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101 def evaluate(self, expression):
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102 assert expression.startswith("$") and expression.endswith("$"), expression
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103 expression = expression[1:-1]
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104 m = name_match(expression)
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105 if m:
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106 type, expr = m.group(1, 2)
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107 else:
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108 type = "path"
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109 expr = expression
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110 if type in ("string", "str"):
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111 return expr
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112 if type in ("path", "var", "global", "local"):
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113 return self.evaluatePathOrVar(expr)
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114 if type == "not":
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115 return not self.evaluate(expr)
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116 if type == "exists":
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117 return expr in self.locals or expr in self.globals
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118 if type == "python":
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119 try:
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120 return eval(expr, self.globals, self.locals)
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121 except:
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122 raise TALESError("evaluation error in %s" % repr(expr))
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123 if type == "position":
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124 # Insert the current source file name, line number,
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125 # and column offset.
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126 if self.position:
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127 lineno, offset = self.position
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128 else:
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129 lineno, offset = None, None
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130 return '%s (%s,%s)' % (self.source_file, lineno, offset)
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131 raise TALESError("unrecognized expression: " + repr(expression))
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132
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133 def evaluatePathOrVar(self, expr):
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134 expr = expr.strip()
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135 if expr in self.locals:
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136 return self.locals[expr]
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137 elif expr in self.globals:
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138 return self.globals[expr]
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139 else:
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140 raise TALESError("unknown variable: %s" % repr(expr))
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141
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142 def evaluateValue(self, expr):
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143 return self.evaluate(expr)
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144
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145 def evaluateBoolean(self, expr):
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146 return self.evaluate(expr)
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147
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148 def evaluateText(self, expr):
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149 text = self.evaluate(expr)
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150 if text is not None and text is not Default:
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151 text = ustr(text)
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152 return text
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153
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154 def evaluateStructure(self, expr):
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155 # XXX Should return None or a DOM tree
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156 return self.evaluate(expr)
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157
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158 def evaluateSequence(self, expr):
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159 # XXX Should return a sequence
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160 return self.evaluate(expr)
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161
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162 def evaluateMacro(self, macroName):
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792586cc78a4 issue2550728: remove buggy parentheses in TAL/DummyEngine.py.
Bernhard Reiter <Bernhard.Reiter@intevation.de>
parents: 2348
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163 assert macroName.startswith("$") and macroName.endswith("$"), macroName
2348
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164 macroName = macroName[1:-1]
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165 file, localName = self.findMacroFile(macroName)
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166 if not file:
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167 # Local macro
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168 macro = self.macros[localName]
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169 else:
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170 # External macro
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171 import driver
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172 program, macros = driver.compilefile(file)
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173 macro = macros.get(localName)
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174 if not macro:
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175 raise TALESError("macro %s not found in file %s" %
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176 (localName, file))
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177 return macro
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178
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179 def findMacroDocument(self, macroName):
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180 file, localName = self.findMacroFile(macroName)
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181 if not file:
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182 return file, localName
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183 import driver
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184 doc = driver.parsefile(file)
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185 return doc, localName
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186
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187 def findMacroFile(self, macroName):
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188 if not macroName:
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189 raise TALESError("empty macro name")
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190 i = macroName.rfind('/')
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191 if i < 0:
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192 # No slash -- must be a locally defined macro
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193 return None, macroName
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194 else:
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195 # Up to last slash is the filename
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196 fileName = macroName[:i]
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197 localName = macroName[i+1:]
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198 return fileName, localName
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199
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200 def setRepeat(self, name, expr):
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201 seq = self.evaluateSequence(expr)
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202 return Iterator(name, seq, self)
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203
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204 def createErrorInfo(self, err, position):
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205 return ErrorInfo(err, position)
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206
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207 def getDefault(self):
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208 return Default
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209
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210 def translate(self, domain, msgid, mapping, default=None):
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211 return self.translationService.translate(domain, msgid, mapping,
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212 default=default)
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213
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214
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215 class Iterator:
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216
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217 # This is not an implementation of a Python iterator. The next()
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218 # method returns true or false to indicate whether another item is
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219 # available; if there is another item, the iterator instance calls
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220 # setLocal() on the evaluation engine passed to the constructor.
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221
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222 def __init__(self, name, seq, engine):
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223 self.name = name
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224 self.seq = seq
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225 self.engine = engine
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226 self.nextIndex = 0
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227
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228 def next(self):
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229 i = self.nextIndex
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230 try:
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231 item = self.seq[i]
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232 except IndexError:
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233 return 0
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234 self.nextIndex = i+1
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235 self.engine.setLocal(self.name, item)
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236 return 1
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237
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238 class DummyDomain:
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239 __implements__ = IDomain
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240
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241 def translate(self, msgid, mapping=None, context=None,
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242 target_language=None, default=None):
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243 # This is a fake translation service which simply uppercases non
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diff changeset
244 # ${name} placeholder text in the message id.
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245 #
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246 # First, transform a string with ${name} placeholders into a list of
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247 # substrings. Then upcase everything but the placeholders, then glue
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diff changeset
248 # things back together.
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249
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250 # simulate an unknown msgid by returning None
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251 if msgid == "don't translate me":
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252 text = default
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253 else:
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254 text = msgid.upper()
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255
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256 def repl(m, mapping=mapping):
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257 return ustr(mapping[m.group(m.lastindex).lower()])
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diff changeset
258 cre = re.compile(r'\$(?:(%s)|\{(%s)\})' % (NAME_RE, NAME_RE))
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parents:
diff changeset
259 return cre.sub(repl, text)
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260
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261 class DummyTranslationService:
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262 __implements__ = ITranslationService
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263
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264 def translate(self, domain, msgid, mapping=None, context=None,
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265 target_language=None, default=None):
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266 return self.getDomain(domain).translate(msgid, mapping, context,
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diff changeset
267 target_language,
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268 default=default)
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269
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270 def getDomain(self, domain):
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diff changeset
271 return DummyDomain()
Roundup Issue Tracker: http://roundup-tracker.org/