annotate genshi/template/directives.py @ 347:c0a4114786cc experimental-inline

cspeedups branch: Merged [423:426/trunk].
author cmlenz
date Fri, 10 Nov 2006 17:38:50 +0000
parents eb4ef44ea1ad
children 0fc758cb3a02
rev   line source
336
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2006 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 """Implementation of the various template directives."""
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15
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16 import compiler
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17
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18 from genshi.core import Attrs, Stream
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19 from genshi.path import Path
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20 from genshi.template.core import EXPR, Directive, TemplateRuntimeError, \
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21 TemplateSyntaxError, _apply_directives
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22 from genshi.template.eval import Expression, _parse
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23
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24 __all__ = ['AttrsDirective', 'ChooseDirective', 'ContentDirective',
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25 'DefDirective', 'ForDirective', 'IfDirective', 'MatchDirective',
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26 'OtherwiseDirective', 'ReplaceDirective', 'StripDirective',
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27 'WhenDirective', 'WithDirective']
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28
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29
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30 def _assignment(ast):
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31 """Takes the AST representation of an assignment, and returns a function
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32 that applies the assignment of a given value to a dictionary.
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33 """
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34 def _names(node):
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35 if isinstance(node, (compiler.ast.AssTuple, compiler.ast.Tuple)):
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36 return tuple([_names(child) for child in node.nodes])
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37 elif isinstance(node, (compiler.ast.AssName, compiler.ast.Name)):
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38 return node.name
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39 def _assign(data, value, names=_names(ast)):
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40 if type(names) is tuple:
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41 for idx in range(len(names)):
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42 _assign(data, value[idx], names[idx])
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43 else:
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44 data[names] = value
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45 return _assign
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46
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47
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48 class AttrsDirective(Directive):
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49 """Implementation of the `py:attrs` template directive.
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50
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51 The value of the `py:attrs` attribute should be a dictionary or a sequence
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52 of `(name, value)` tuples. The items in that dictionary or sequence are
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53 added as attributes to the element:
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54
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55 >>> from genshi.template import MarkupTemplate
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56 >>> tmpl = MarkupTemplate('''<ul xmlns:py="http://genshi.edgewall.org/">
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57 ... <li py:attrs="foo">Bar</li>
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58 ... </ul>''')
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59 >>> print tmpl.generate(foo={'class': 'collapse'})
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60 <ul>
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61 <li class="collapse">Bar</li>
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62 </ul>
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63 >>> print tmpl.generate(foo=[('class', 'collapse')])
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64 <ul>
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65 <li class="collapse">Bar</li>
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66 </ul>
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67
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68 If the value evaluates to `None` (or any other non-truth value), no
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69 attributes are added:
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70
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71 >>> print tmpl.generate(foo=None)
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72 <ul>
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73 <li>Bar</li>
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74 </ul>
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75 """
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76 __slots__ = []
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77
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78 def __call__(self, stream, ctxt, directives):
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79 def _generate():
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80 kind, (tag, attrib), pos = stream.next()
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81 attrs = self.expr.evaluate(ctxt)
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82 if attrs:
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83 if isinstance(attrs, Stream):
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84 try:
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85 attrs = iter(attrs).next()
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86 except StopIteration:
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87 attrs = []
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88 elif not isinstance(attrs, list): # assume it's a dict
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89 attrs = attrs.items()
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90 attrib -= [name for name, val in attrs if val is None]
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91 attrib |= [(name, unicode(val).strip()) for name, val in attrs
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92 if val is not None]
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93 yield kind, (tag, attrib), pos
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94 for event in stream:
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95 yield event
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96
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97 return _apply_directives(_generate(), ctxt, directives)
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98
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99
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100 class ContentDirective(Directive):
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101 """Implementation of the `py:content` template directive.
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102
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103 This directive replaces the content of the element with the result of
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104 evaluating the value of the `py:content` attribute:
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105
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106 >>> from genshi.template import MarkupTemplate
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107 >>> tmpl = MarkupTemplate('''<ul xmlns:py="http://genshi.edgewall.org/">
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108 ... <li py:content="bar">Hello</li>
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109 ... </ul>''')
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110 >>> print tmpl.generate(bar='Bye')
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111 <ul>
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112 <li>Bye</li>
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113 </ul>
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114 """
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115 __slots__ = []
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116
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117 def __call__(self, stream, ctxt, directives):
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118 def _generate():
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119 yield stream.next()
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120 yield EXPR, self.expr, (None, -1, -1)
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121 event = stream.next()
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122 for next in stream:
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123 event = next
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124 yield event
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125
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126 return _apply_directives(_generate(), ctxt, directives)
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127
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128
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129 class DefDirective(Directive):
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130 """Implementation of the `py:def` template directive.
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131
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132 This directive can be used to create "Named Template Functions", which
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133 are template snippets that are not actually output during normal
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134 processing, but rather can be expanded from expressions in other places
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135 in the template.
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136
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137 A named template function can be used just like a normal Python function
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138 from template expressions:
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139
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140 >>> from genshi.template import MarkupTemplate
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141 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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142 ... <p py:def="echo(greeting, name='world')" class="message">
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143 ... ${greeting}, ${name}!
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144 ... </p>
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145 ... ${echo('Hi', name='you')}
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146 ... </div>''')
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147 >>> print tmpl.generate(bar='Bye')
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148 <div>
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149 <p class="message">
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150 Hi, you!
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151 </p>
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152 </div>
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153
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154 If a function does not require parameters, the parenthesis can be omitted
344
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155 in the definition:
336
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156
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157 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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158 ... <p py:def="helloworld" class="message">
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159 ... Hello, world!
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160 ... </p>
344
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161 ... ${helloworld()}
336
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162 ... </div>''')
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163 >>> print tmpl.generate(bar='Bye')
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164 <div>
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165 <p class="message">
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166 Hello, world!
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167 </p>
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168 </div>
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169 """
342
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170 __slots__ = ['name', 'args', 'defaults', 'signature']
336
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171
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172 ATTRIBUTE = 'function'
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173
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174 def __init__(self, args, namespaces=None, filename=None, lineno=-1,
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175 offset=-1):
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176 Directive.__init__(self, None, namespaces, filename, lineno, offset)
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177 self.signature = args.strip()
336
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178 ast = _parse(args).node
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179 self.args = []
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180 self.defaults = {}
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181 if isinstance(ast, compiler.ast.CallFunc):
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182 self.name = ast.node.name
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183 for arg in ast.args:
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184 if isinstance(arg, compiler.ast.Keyword):
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185 self.args.append(arg.name)
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186 self.defaults[arg.name] = Expression(arg.expr, filename,
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187 lineno)
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188 else:
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189 self.args.append(arg.name)
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190 else:
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191 self.name = ast.name
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192
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193 def __call__(self, stream, ctxt, directives):
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194 stream = list(stream)
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195
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196 def function(*args, **kwargs):
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197 scope = {}
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198 args = list(args) # make mutable
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199 for name in self.args:
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200 if args:
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201 scope[name] = args.pop(0)
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202 else:
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203 if name in kwargs:
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204 val = kwargs.pop(name)
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205 else:
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206 val = self.defaults.get(name).evaluate(ctxt)
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207 scope[name] = val
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208 ctxt.push(scope)
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209 for event in _apply_directives(stream, ctxt, directives):
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210 yield event
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211 ctxt.pop()
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212 try:
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213 function.__name__ = self.name
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214 except TypeError:
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215 # Function name can't be set in Python 2.3
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216 pass
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217
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218 # Store the function reference in the bottom context frame so that it
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219 # doesn't get popped off before processing the template has finished
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220 # FIXME: this makes context data mutable as a side-effect
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221 ctxt.frames[-1][self.name] = function
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222
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223 return []
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224
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225 def __repr__(self):
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226 return '<%s "%s">' % (self.__class__.__name__, self.name)
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227
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228
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229 class ForDirective(Directive):
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230 """Implementation of the `py:for` template directive for repeating an
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231 element based on an iterable in the context data.
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232
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233 >>> from genshi.template import MarkupTemplate
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234 >>> tmpl = MarkupTemplate('''<ul xmlns:py="http://genshi.edgewall.org/">
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235 ... <li py:for="item in items">${item}</li>
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236 ... </ul>''')
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237 >>> print tmpl.generate(items=[1, 2, 3])
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238 <ul>
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239 <li>1</li><li>2</li><li>3</li>
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240 </ul>
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241 """
339
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242 __slots__ = ['assign', 'target', 'filename']
336
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243
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244 ATTRIBUTE = 'each'
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245
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246 def __init__(self, value, namespaces=None, filename=None, lineno=-1,
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247 offset=-1):
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248 if ' in ' not in value:
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249 raise TemplateSyntaxError('"in" keyword missing in "for" directive',
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250 filename, lineno, offset)
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251 assign, value = value.split(' in ', 1)
339
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252 self.target = _parse(assign, 'exec').node.nodes[0].expr
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253 self.assign = _assignment(self.target)
336
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254 self.filename = filename
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255 Directive.__init__(self, value.strip(), namespaces, filename, lineno,
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256 offset)
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257
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258 def __call__(self, stream, ctxt, directives):
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259 iterable = self.expr.evaluate(ctxt)
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260 if iterable is None:
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261 return
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262
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263 assign = self.assign
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264 scope = {}
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265 stream = list(stream)
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266 try:
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267 iterator = iter(iterable)
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268 for item in iterator:
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269 assign(scope, item)
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270 ctxt.push(scope)
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271 for event in _apply_directives(stream, ctxt, directives):
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272 yield event
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273 ctxt.pop()
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274 except TypeError, e:
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275 raise TemplateRuntimeError(str(e), self.filename, *stream[0][2][1:])
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276
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277 def __repr__(self):
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278 return '<%s>' % self.__class__.__name__
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279
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280
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281 class IfDirective(Directive):
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282 """Implementation of the `py:if` template directive for conditionally
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283 excluding elements from being output.
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284
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285 >>> from genshi.template import MarkupTemplate
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286 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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287 ... <b py:if="foo">${bar}</b>
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288 ... </div>''')
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289 >>> print tmpl.generate(foo=True, bar='Hello')
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290 <div>
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291 <b>Hello</b>
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292 </div>
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293 """
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294 __slots__ = []
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295
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296 ATTRIBUTE = 'test'
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297
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298 def __call__(self, stream, ctxt, directives):
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299 if self.expr.evaluate(ctxt):
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300 return _apply_directives(stream, ctxt, directives)
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301 return []
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302
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303
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304 class MatchDirective(Directive):
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305 """Implementation of the `py:match` template directive.
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306
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307 >>> from genshi.template import MarkupTemplate
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308 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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309 ... <span py:match="greeting">
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310 ... Hello ${select('@name')}
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311 ... </span>
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312 ... <greeting name="Dude" />
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313 ... </div>''')
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314 >>> print tmpl.generate()
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315 <div>
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316 <span>
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317 Hello Dude
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318 </span>
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319 </div>
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320 """
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321 __slots__ = ['path', 'namespaces']
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322
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323 ATTRIBUTE = 'path'
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324
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325 def __init__(self, value, namespaces=None, filename=None, lineno=-1,
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326 offset=-1):
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327 Directive.__init__(self, None, namespaces, filename, lineno, offset)
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328 self.path = Path(value, filename, lineno)
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329 if namespaces is None:
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330 namespaces = {}
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331 self.namespaces = namespaces.copy()
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332
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333 def __call__(self, stream, ctxt, directives):
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334 ctxt._match_templates.append((self.path.test(ignore_context=True),
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335 self.path, list(stream), self.namespaces,
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336 directives))
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337 return []
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338
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339 def __repr__(self):
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340 return '<%s "%s">' % (self.__class__.__name__, self.path.source)
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341
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342
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343 class ReplaceDirective(Directive):
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344 """Implementation of the `py:replace` template directive.
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345
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346 This directive replaces the element with the result of evaluating the
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347 value of the `py:replace` attribute:
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348
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349 >>> from genshi.template import MarkupTemplate
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350 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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351 ... <span py:replace="bar">Hello</span>
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352 ... </div>''')
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353 >>> print tmpl.generate(bar='Bye')
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354 <div>
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355 Bye
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356 </div>
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357
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358 This directive is equivalent to `py:content` combined with `py:strip`,
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359 providing a less verbose way to achieve the same effect:
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360
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361 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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362 ... <span py:content="bar" py:strip="">Hello</span>
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363 ... </div>''')
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364 >>> print tmpl.generate(bar='Bye')
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365 <div>
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366 Bye
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367 </div>
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368 """
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369 __slots__ = []
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370
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371 def __call__(self, stream, ctxt, directives):
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372 yield EXPR, self.expr, (None, -1, -1)
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373
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374
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375 class StripDirective(Directive):
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376 """Implementation of the `py:strip` template directive.
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377
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378 When the value of the `py:strip` attribute evaluates to `True`, the element
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379 is stripped from the output
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380
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381 >>> from genshi.template import MarkupTemplate
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382 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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383 ... <div py:strip="True"><b>foo</b></div>
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384 ... </div>''')
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385 >>> print tmpl.generate()
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386 <div>
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387 <b>foo</b>
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388 </div>
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389
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390 Leaving the attribute value empty is equivalent to a truth value.
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391
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392 This directive is particulary interesting for named template functions or
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393 match templates that do not generate a top-level element:
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394
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395 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
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396 ... <div py:def="echo(what)" py:strip="">
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397 ... <b>${what}</b>
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398 ... </div>
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399 ... ${echo('foo')}
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400 ... </div>''')
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401 >>> print tmpl.generate()
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402 <div>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
403 <b>foo</b>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
404 </div>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
405 """
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
406 __slots__ = []
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
407
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
408 def __call__(self, stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
409 def _generate():
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
410 if self.expr:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
411 strip = self.expr.evaluate(ctxt)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
412 else:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
413 strip = True
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
414 if strip:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
415 stream.next() # skip start tag
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
416 previous = stream.next()
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
417 for event in stream:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
418 yield previous
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
419 previous = event
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
420 else:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
421 for event in stream:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
422 yield event
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
423
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
424 return _apply_directives(_generate(), ctxt, directives)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
425
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
426
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
427 class ChooseDirective(Directive):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
428 """Implementation of the `py:choose` directive for conditionally selecting
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
429 one of several body elements to display.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
430
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
431 If the `py:choose` expression is empty the expressions of nested `py:when`
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
432 directives are tested for truth. The first true `py:when` body is output.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
433 If no `py:when` directive is matched then the fallback directive
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
434 `py:otherwise` will be used.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
435
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
436 >>> from genshi.template import MarkupTemplate
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
437 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/"
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
438 ... py:choose="">
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
439 ... <span py:when="0 == 1">0</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
440 ... <span py:when="1 == 1">1</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
441 ... <span py:otherwise="">2</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
442 ... </div>''')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
443 >>> print tmpl.generate()
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
444 <div>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
445 <span>1</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
446 </div>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
447
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
448 If the `py:choose` directive contains an expression, the nested `py:when`
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
449 directives are tested for equality to the `py:choose` expression:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
450
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
451 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/"
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
452 ... py:choose="2">
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
453 ... <span py:when="1">1</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
454 ... <span py:when="2">2</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
455 ... </div>''')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
456 >>> print tmpl.generate()
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
457 <div>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
458 <span>2</span>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
459 </div>
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
460
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
461 Behavior is undefined if a `py:choose` block contains content outside a
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
462 `py:when` or `py:otherwise` block. Behavior is also undefined if a
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
463 `py:otherwise` occurs before `py:when` blocks.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
464 """
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
465 __slots__ = ['matched', 'value']
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
466
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
467 ATTRIBUTE = 'test'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
468
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
469 def __call__(self, stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
470 frame = dict({'_choose.matched': False})
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
471 if self.expr:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
472 frame['_choose.value'] = self.expr.evaluate(ctxt)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
473 ctxt.push(frame)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
474 for event in _apply_directives(stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
475 yield event
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
476 ctxt.pop()
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
477
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
478
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
479 class WhenDirective(Directive):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
480 """Implementation of the `py:when` directive for nesting in a parent with
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
481 the `py:choose` directive.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
482
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
483 See the documentation of `py:choose` for usage.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
484 """
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
485 __slots__ = ['filename']
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
486
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
487 ATTRIBUTE = 'test'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
488
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
489 def __init__(self, value, namespaces=None, filename=None, lineno=-1,
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
490 offset=-1):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
491 Directive.__init__(self, value, namespaces, filename, lineno, offset)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
492 self.filename = filename
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
493
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
494 def __call__(self, stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
495 matched, frame = ctxt._find('_choose.matched')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
496 if not frame:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
497 raise TemplateRuntimeError('"when" directives can only be used '
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
498 'inside a "choose" directive',
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
499 self.filename, *stream.next()[2][1:])
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
500 if matched:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
501 return []
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
502 if not self.expr and '_choose.value' not in frame:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
503 raise TemplateRuntimeError('either "choose" or "when" directive '
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
504 'must have a test expression',
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
505 self.filename, *stream.next()[2][1:])
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
506 if '_choose.value' in frame:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
507 value = frame['_choose.value']
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
508 if self.expr:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
509 matched = value == self.expr.evaluate(ctxt)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
510 else:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
511 matched = bool(value)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
512 else:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
513 matched = bool(self.expr.evaluate(ctxt))
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
514 frame['_choose.matched'] = matched
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
515 if not matched:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
516 return []
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
517
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
518 return _apply_directives(stream, ctxt, directives)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
519
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
520
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
521 class OtherwiseDirective(Directive):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
522 """Implementation of the `py:otherwise` directive for nesting in a parent
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
523 with the `py:choose` directive.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
524
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
525 See the documentation of `py:choose` for usage.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
526 """
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
527 __slots__ = ['filename']
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
528
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
529 def __init__(self, value, namespaces=None, filename=None, lineno=-1,
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
530 offset=-1):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
531 Directive.__init__(self, None, namespaces, filename, lineno, offset)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
532 self.filename = filename
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
533
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
534 def __call__(self, stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
535 matched, frame = ctxt._find('_choose.matched')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
536 if not frame:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff changeset
537 raise TemplateRuntimeError('an "otherwise" directive can only be '
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538 'used inside a "choose" directive',
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539 self.filename, *stream.next()[2][1:])
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540 if matched:
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541 return []
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542 frame['_choose.matched'] = True
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543
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544 return _apply_directives(stream, ctxt, directives)
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545
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546
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547 class WithDirective(Directive):
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548 """Implementation of the `py:with` template directive, which allows
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549 shorthand access to variables and expressions.
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550
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551 >>> from genshi.template import MarkupTemplate
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552 >>> tmpl = MarkupTemplate('''<div xmlns:py="http://genshi.edgewall.org/">
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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553 ... <span py:with="y=7; z=x+10">$x $y $z</span>
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554 ... </div>''')
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555 >>> print tmpl.generate(x=42)
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556 <div>
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557 <span>42 7 52</span>
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diff changeset
558 </div>
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559 """
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560 __slots__ = ['vars']
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561
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562 ATTRIBUTE = 'vars'
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diff changeset
563
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564 def __init__(self, value, namespaces=None, filename=None, lineno=-1,
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565 offset=-1):
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diff changeset
566 Directive.__init__(self, None, namespaces, filename, lineno, offset)
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567 self.vars = []
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568 value = value.strip()
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
569 try:
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570 ast = _parse(value, 'exec').node
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
571 for node in ast.nodes:
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572 if isinstance(node, compiler.ast.Discard):
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573 continue
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574 elif not isinstance(node, compiler.ast.Assign):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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575 raise TemplateSyntaxError('only assignment allowed in '
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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576 'value of the "with" directive',
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
577 filename, lineno, offset)
339
83c3d04bba97 First code for the `inline` branch? only bits and pieces working right now.
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diff changeset
578 self.vars.append(([(n, _assignment(n)) for n in node.nodes],
336
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
579 Expression(node.expr, filename, lineno)))
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
580 except SyntaxError, err:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
581 err.msg += ' in expression "%s" of "%s" directive' % (value,
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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parents:
diff changeset
582 self.tagname)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
583 raise TemplateSyntaxError(err, filename, lineno,
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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parents:
diff changeset
584 offset + (err.offset or 0))
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
585
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
586 def __call__(self, stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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587 frame = {}
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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588 ctxt.push(frame)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
589 for targets, expr in self.vars:
344
eb4ef44ea1ad inline branch: Merged [419:421/trunk].
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parents: 342
diff changeset
590 value = expr.evaluate(ctxt)
339
83c3d04bba97 First code for the `inline` branch? only bits and pieces working right now.
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parents: 336
diff changeset
591 for _, assign in targets:
336
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diff changeset
592 assign(frame, value)
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diff changeset
593 for event in _apply_directives(stream, ctxt, directives):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
594 yield event
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
595 ctxt.pop()
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
596
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
597 def __repr__(self):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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diff changeset
598 return '<%s>' % (self.__class__.__name__)
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