annotate genshi/core.py @ 907:bb813ef5fe25 experimental-inline

inline branch: merged r1129 from trunk.
author cmlenz
date Wed, 28 Apr 2010 21:36:59 +0000
parents 09cc3627654c
children
rev   line source
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2006-2009 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 """Core classes for markup processing."""
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15
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16 try:
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17 reduce # builtin in Python < 3
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18 except NameError:
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19 from functools import reduce
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20 from itertools import chain
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21 import operator
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22
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23 from genshi.util import plaintext, stripentities, striptags, stringrepr
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24
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25 __all__ = ['Stream', 'Markup', 'escape', 'unescape', 'Attrs', 'Namespace',
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26 'QName']
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27 __docformat__ = 'restructuredtext en'
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28
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29
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ad63ad459524 Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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30 class StreamEventKind(str):
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31 """A kind of event on a markup stream."""
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32 __slots__ = []
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33 _instances = {}
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34
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35 def __new__(cls, val):
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36 return cls._instances.setdefault(val, str.__new__(cls, val))
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37
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38
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39 class Stream(object):
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40 """Represents a stream of markup events.
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41
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42 This class is basically an iterator over the events.
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43
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44 Stream events are tuples of the form::
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45
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46 (kind, data, position)
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47
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48 where ``kind`` is the event kind (such as `START`, `END`, `TEXT`, etc),
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49 ``data`` depends on the kind of event, and ``position`` is a
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50 ``(filename, line, offset)`` tuple that contains the location of the
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51 original element or text in the input. If the original location is unknown,
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52 ``position`` is ``(None, -1, -1)``.
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53
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54 Also provided are ways to serialize the stream to text. The `serialize()`
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55 method will return an iterator over generated strings, while `render()`
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56 returns the complete generated text at once. Both accept various parameters
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57 that impact the way the stream is serialized.
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58 """
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59 __slots__ = ['events', 'serializer']
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60
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61 START = StreamEventKind('START') #: a start tag
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62 END = StreamEventKind('END') #: an end tag
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63 TEXT = StreamEventKind('TEXT') #: literal text
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64 XML_DECL = StreamEventKind('XML_DECL') #: XML declaration
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65 DOCTYPE = StreamEventKind('DOCTYPE') #: doctype declaration
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66 START_NS = StreamEventKind('START_NS') #: start namespace mapping
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67 END_NS = StreamEventKind('END_NS') #: end namespace mapping
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68 START_CDATA = StreamEventKind('START_CDATA') #: start CDATA section
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69 END_CDATA = StreamEventKind('END_CDATA') #: end CDATA section
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70 PI = StreamEventKind('PI') #: processing instruction
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71 COMMENT = StreamEventKind('COMMENT') #: comment
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72
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73 def __init__(self, events, serializer=None):
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74 """Initialize the stream with a sequence of markup events.
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75
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76 :param events: a sequence or iterable providing the events
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77 :param serializer: the default serialization method to use for this
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78 stream
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79
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80 :note: Changed in 0.5: added the `serializer` argument
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81 """
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82 self.events = events #: The underlying iterable producing the events
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83 self.serializer = serializer #: The default serializion method
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84
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85 def __iter__(self):
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86 return iter(self.events)
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87
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88 def __or__(self, function):
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89 """Override the "bitwise or" operator to apply filters or serializers
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90 to the stream, providing a syntax similar to pipes on Unix shells.
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91
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92 Assume the following stream produced by the `HTML` function:
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93
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94 >>> from genshi.input import HTML
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95 >>> html = HTML('''<p onclick="alert('Whoa')">Hello, world!</p>''')
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96 >>> print(html)
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97 <p onclick="alert('Whoa')">Hello, world!</p>
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98
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99 A filter such as the HTML sanitizer can be applied to that stream using
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100 the pipe notation as follows:
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101
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102 >>> from genshi.filters import HTMLSanitizer
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103 >>> sanitizer = HTMLSanitizer()
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104 >>> print(html | sanitizer)
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105 <p>Hello, world!</p>
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106
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107 Filters can be any function that accepts and produces a stream (where
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108 a stream is anything that iterates over events):
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109
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110 >>> def uppercase(stream):
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111 ... for kind, data, pos in stream:
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112 ... if kind is TEXT:
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113 ... data = data.upper()
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114 ... yield kind, data, pos
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115 >>> print(html | sanitizer | uppercase)
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116 <p>HELLO, WORLD!</p>
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117
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118 Serializers can also be used with this notation:
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119
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120 >>> from genshi.output import TextSerializer
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121 >>> output = TextSerializer()
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122 >>> print(html | sanitizer | uppercase | output)
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123 HELLO, WORLD!
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124
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125 Commonly, serializers should be used at the end of the "pipeline";
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126 using them somewhere in the middle may produce unexpected results.
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127
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128 :param function: the callable object that should be applied as a filter
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129 :return: the filtered stream
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130 :rtype: `Stream`
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131 """
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132 return Stream(_ensure(function(self)), serializer=self.serializer)
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133
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134 def filter(self, *filters):
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135 """Apply filters to the stream.
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136
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137 This method returns a new stream with the given filters applied. The
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138 filters must be callables that accept the stream object as parameter,
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139 and return the filtered stream.
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140
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141 The call::
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142
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143 stream.filter(filter1, filter2)
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144
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145 is equivalent to::
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146
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147 stream | filter1 | filter2
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148
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149 :param filters: one or more callable objects that should be applied as
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150 filters
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151 :return: the filtered stream
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152 :rtype: `Stream`
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153 """
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154 return reduce(operator.or_, (self,) + filters)
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155
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156 def render(self, method=None, encoding='utf-8', out=None, **kwargs):
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157 """Return a string representation of the stream.
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158
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159 Any additional keyword arguments are passed to the serializer, and thus
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160 depend on the `method` parameter value.
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161
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162 :param method: determines how the stream is serialized; can be either
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163 "xml", "xhtml", "html", "text", or a custom serializer
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164 class; if `None`, the default serialization method of
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165 the stream is used
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166 :param encoding: how the output string should be encoded; if set to
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167 `None`, this method returns a `unicode` object
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168 :param out: a file-like object that the output should be written to
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169 instead of being returned as one big string; note that if
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170 this is a file or socket (or similar), the `encoding` must
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171 not be `None` (that is, the output must be encoded)
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172 :return: a `str` or `unicode` object (depending on the `encoding`
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173 parameter), or `None` if the `out` parameter is provided
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174 :rtype: `basestring`
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175
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176 :see: XMLSerializer, XHTMLSerializer, HTMLSerializer, TextSerializer
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177 :note: Changed in 0.5: added the `out` parameter
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178 """
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179 from genshi.output import encode
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180 if method is None:
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181 method = self.serializer or 'xml'
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182 generator = self.serialize(method=method, **kwargs)
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183 return encode(generator, method=method, encoding=encoding, out=out)
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184
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185 def select(self, path, namespaces=None, variables=None):
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186 """Return a new stream that contains the events matching the given
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187 XPath expression.
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188
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189 >>> from genshi import HTML
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190 >>> stream = HTML('<doc><elem>foo</elem><elem>bar</elem></doc>')
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191 >>> print(stream.select('elem'))
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192 <elem>foo</elem><elem>bar</elem>
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193 >>> print(stream.select('elem/text()'))
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194 foobar
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195
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196 Note that the outermost element of the stream becomes the *context
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197 node* for the XPath test. That means that the expression "doc" would
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198 not match anything in the example above, because it only tests against
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199 child elements of the outermost element:
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200
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201 >>> print(stream.select('doc'))
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202 <BLANKLINE>
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203
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204 You can use the "." expression to match the context node itself
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205 (although that usually makes little sense):
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206
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207 >>> print(stream.select('.'))
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208 <doc><elem>foo</elem><elem>bar</elem></doc>
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209
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210 :param path: a string containing the XPath expression
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211 :param namespaces: mapping of namespace prefixes used in the path
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212 :param variables: mapping of variable names to values
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213 :return: the selected substream
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214 :rtype: `Stream`
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215 :raises PathSyntaxError: if the given path expression is invalid or not
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216 supported
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217 """
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218 from genshi.path import Path
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219 return Path(path).select(self, namespaces, variables)
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220
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221 def serialize(self, method='xml', **kwargs):
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222 """Generate strings corresponding to a specific serialization of the
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223 stream.
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224
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225 Unlike the `render()` method, this method is a generator that returns
1
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226 the serialized output incrementally, as opposed to returning a single
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227 string.
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228
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229 Any additional keyword arguments are passed to the serializer, and thus
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230 depend on the `method` parameter value.
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231
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232 :param method: determines how the stream is serialized; can be either
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233 "xml", "xhtml", "html", "text", or a custom serializer
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234 class; if `None`, the default serialization method of
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235 the stream is used
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236 :return: an iterator over the serialization results (`Markup` or
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237 `unicode` objects, depending on the serialization method)
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238 :rtype: ``iterator``
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239 :see: XMLSerializer, XHTMLSerializer, HTMLSerializer, TextSerializer
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240 """
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241 from genshi.output import get_serializer
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242 if method is None:
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243 method = self.serializer or 'xml'
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244 return get_serializer(method, **kwargs)(_ensure(self))
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245
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246 def __str__(self):
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247 return self.render()
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248
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249 def __unicode__(self):
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250 return self.render(encoding=None)
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251
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252 def __html__(self):
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253 return self
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254
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255
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256 START = Stream.START
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257 END = Stream.END
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258 TEXT = Stream.TEXT
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259 XML_DECL = Stream.XML_DECL
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260 DOCTYPE = Stream.DOCTYPE
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261 START_NS = Stream.START_NS
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262 END_NS = Stream.END_NS
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263 START_CDATA = Stream.START_CDATA
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264 END_CDATA = Stream.END_CDATA
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265 PI = Stream.PI
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266 COMMENT = Stream.COMMENT
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267
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268
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269 def _ensure(stream):
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270 """Ensure that every item on the stream is actually a markup event."""
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271 stream = iter(stream)
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272 event = stream.next()
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273
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274 # Check whether the iterable is a real markup event stream by examining the
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275 # first item it yields; if it's not we'll need to do some conversion
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276 if type(event) is not tuple or len(event) != 3:
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277 for event in chain([event], stream):
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278 if hasattr(event, 'totuple'):
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279 event = event.totuple()
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280 else:
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281 event = TEXT, unicode(event), (None, -1, -1)
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282 yield event
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283 return
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284
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285 # This looks like a markup event stream, so we'll just pass it through
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286 # unchanged
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287 yield event
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288 for event in stream:
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289 yield event
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290
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291
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292 class Attrs(tuple):
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293 """Immutable sequence type that stores the attributes of an element.
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294
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295 Ordering of the attributes is preserved, while access by name is also
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296 supported.
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297
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298 >>> attrs = Attrs([('href', '#'), ('title', 'Foo')])
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299 >>> attrs
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300 Attrs([('href', '#'), ('title', 'Foo')])
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301
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302 >>> 'href' in attrs
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303 True
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304 >>> 'tabindex' in attrs
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305 False
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306 >>> attrs.get('title')
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307 'Foo'
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308
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309 Instances may not be manipulated directly. Instead, the operators ``|`` and
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310 ``-`` can be used to produce new instances that have specific attributes
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311 added, replaced or removed.
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312
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313 To remove an attribute, use the ``-`` operator. The right hand side can be
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314 either a string or a set/sequence of strings, identifying the name(s) of
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315 the attribute(s) to remove:
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316
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317 >>> attrs - 'title'
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318 Attrs([('href', '#')])
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319 >>> attrs - ('title', 'href')
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320 Attrs()
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321
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322 The original instance is not modified, but the operator can of course be
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323 used with an assignment:
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324
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325 >>> attrs
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326 Attrs([('href', '#'), ('title', 'Foo')])
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327 >>> attrs -= 'title'
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328 >>> attrs
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329 Attrs([('href', '#')])
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330
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331 To add a new attribute, use the ``|`` operator, where the right hand value
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332 is a sequence of ``(name, value)`` tuples (which includes `Attrs`
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333 instances):
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334
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335 >>> attrs | [('title', 'Bar')]
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336 Attrs([('href', '#'), ('title', 'Bar')])
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337
347
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338 If the attributes already contain an attribute with a given name, the value
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339 of that attribute is replaced:
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340
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341 >>> attrs | [('href', 'http://example.org/')]
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342 Attrs([('href', 'http://example.org/')])
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343 """
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344 __slots__ = []
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345
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346 def __contains__(self, name):
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347 """Return whether the list includes an attribute with the specified
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348 name.
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349
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350 :return: `True` if the list includes the attribute
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351 :rtype: `bool`
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352 """
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353 for attr, _ in self:
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354 if attr == name:
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355 return True
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356
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357 def __getitem__(self, i):
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358 """Return an item or slice of the attributes list.
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359
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360 >>> attrs = Attrs([('href', '#'), ('title', 'Foo')])
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361 >>> attrs[1]
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362 ('title', 'Foo')
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363 >>> attrs[1:]
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364 Attrs([('title', 'Foo')])
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365 """
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366 items = tuple.__getitem__(self, i)
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367 if type(i) is slice:
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368 return Attrs(items)
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369 return items
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370
347
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371 def __getslice__(self, i, j):
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372 """Return a slice of the attributes list.
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373
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374 >>> attrs = Attrs([('href', '#'), ('title', 'Foo')])
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375 >>> attrs[1:]
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376 Attrs([('title', 'Foo')])
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377 """
347
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378 return Attrs(tuple.__getslice__(self, i, j))
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379
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380 def __or__(self, attrs):
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381 """Return a new instance that contains the attributes in `attrs` in
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382 addition to any already existing attributes. Any attributes in the new
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383 set that have a value of `None` are removed.
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384
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385 :return: a new instance with the merged attributes
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386 :rtype: `Attrs`
347
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387 """
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388 remove = set([an for an, av in attrs if av is None])
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389 replace = dict([(an, av) for an, av in attrs
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390 if an in self and av is not None])
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391 return Attrs([(sn, replace.get(sn, sv)) for sn, sv in self
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392 if sn not in remove] +
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393 [(an, av) for an, av in attrs
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394 if an not in self and an not in remove])
347
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395
326
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396 def __repr__(self):
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397 if not self:
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398 return 'Attrs()'
347
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399 return 'Attrs([%s])' % ', '.join([repr(item) for item in self])
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400
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401 def __sub__(self, names):
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402 """Return a new instance with all attributes with a name in `names` are
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403 removed.
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404
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405 :param names: the names of the attributes to remove
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406 :return: a new instance with the attribute removed
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407 :rtype: `Attrs`
347
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408 """
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409 if isinstance(names, basestring):
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410 names = (names,)
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411 return Attrs([(name, val) for name, val in self if name not in names])
326
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412
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413 def get(self, name, default=None):
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414 """Return the value of the attribute with the specified name, or the
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415 value of the `default` parameter if no such attribute is found.
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416
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417 :param name: the name of the attribute
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418 :param default: the value to return when the attribute does not exist
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419 :return: the attribute value, or the `default` value if that attribute
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420 does not exist
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421 :rtype: `object`
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422 """
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423 for attr, value in self:
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424 if attr == name:
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425 return value
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426 return default
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427
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428 def totuple(self):
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429 """Return the attributes as a markup event.
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430
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431 The returned event is a `TEXT` event, the data is the value of all
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432 attributes joined together.
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433
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434 >>> Attrs([('href', '#'), ('title', 'Foo')]).totuple()
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435 ('TEXT', '#Foo', (None, -1, -1))
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436
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437 :return: a `TEXT` event
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438 :rtype: `tuple`
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439 """
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440 return TEXT, ''.join([x[1] for x in self]), (None, -1, -1)
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441
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442
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443 class Markup(unicode):
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444 """Marks a string as being safe for inclusion in HTML/XML output without
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445 needing to be escaped.
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446 """
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447 __slots__ = []
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448
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449 def __add__(self, other):
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450 return Markup(unicode.__add__(self, escape(other)))
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451
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452 def __radd__(self, other):
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453 return Markup(unicode.__add__(escape(other), self))
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454
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455 def __mod__(self, args):
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456 if isinstance(args, dict):
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457 args = dict(zip(args.keys(), map(escape, args.values())))
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458 elif isinstance(args, (list, tuple)):
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459 args = tuple(map(escape, args))
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460 else:
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461 args = escape(args)
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462 return Markup(unicode.__mod__(self, args))
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463
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464 def __mul__(self, num):
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465 return Markup(unicode.__mul__(self, num))
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466 __rmul__ = __mul__
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467
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468 def __repr__(self):
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469 return "<%s %s>" % (type(self).__name__, unicode.__repr__(self))
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470
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471 def join(self, seq, escape_quotes=True):
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472 """Return a `Markup` object which is the concatenation of the strings
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473 in the given sequence, where this `Markup` object is the separator
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474 between the joined elements.
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475
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476 Any element in the sequence that is not a `Markup` instance is
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477 automatically escaped.
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478
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parents: 398
diff changeset
479 :param seq: the sequence of strings to join
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diff changeset
480 :param escape_quotes: whether double quote characters in the elements
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parents: 398
diff changeset
481 should be escaped
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diff changeset
482 :return: the joined `Markup` object
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483 :rtype: `Markup`
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484 :see: `escape`
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485 """
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486 return Markup(unicode.join(self, [escape(item, quotes=escape_quotes)
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ae293292cbb1 quotes should not be escaped inside text nodes
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parents: 27
diff changeset
487 for item in seq]))
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cmlenz
parents:
diff changeset
488
830
de82830f8816 inline branch: synced with trunk@1038.
cmlenz
parents: 820
diff changeset
489 @classmethod
1
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parents:
diff changeset
490 def escape(cls, text, quotes=True):
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cmlenz
parents:
diff changeset
491 """Create a Markup instance from a string and escape special characters
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cmlenz
parents:
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492 it may contain (<, >, & and \").
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parents:
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493
500
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494 >>> escape('"1 < 2"')
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495 <Markup u'&#34;1 &lt; 2&#34;'>
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496
1
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cmlenz
parents:
diff changeset
497 If the `quotes` parameter is set to `False`, the \" character is left
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cmlenz
parents:
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498 as is. Escaping quotes is generally only required for strings that are
821114ec4f69 Initial import.
cmlenz
parents:
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499 to be used in attribute values.
500
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500
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diff changeset
501 >>> escape('"1 < 2"', quotes=False)
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502 <Markup u'"1 &lt; 2"'>
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503
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diff changeset
504 :param text: the text to escape
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505 :param quotes: if ``True``, double quote characters are escaped in
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506 addition to the other special characters
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507 :return: the escaped `Markup` string
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508 :rtype: `Markup`
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parents:
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509 """
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510 if not text:
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parents: 69
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511 return cls()
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parents: 69
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512 if type(text) is cls:
1
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cmlenz
parents:
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513 return text
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parents: 500
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514 if hasattr(text, '__html__'):
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cmlenz
parents: 902
diff changeset
515 return cls(text.__html__())
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parents: 500
diff changeset
516
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517 text = text.replace('&', '&amp;') \
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parents: 830
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518 .replace('<', '&lt;') \
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parents: 830
diff changeset
519 .replace('>', '&gt;')
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821114ec4f69 Initial import.
cmlenz
parents:
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520 if quotes:
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parents:
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521 text = text.replace('"', '&#34;')
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cmlenz
parents:
diff changeset
522 return cls(text)
821114ec4f69 Initial import.
cmlenz
parents:
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523
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
524 def unescape(self):
500
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parents: 398
diff changeset
525 """Reverse-escapes &, <, >, and \" and returns a `unicode` object.
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parents: 398
diff changeset
526
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parents: 398
diff changeset
527 >>> Markup('1 &lt; 2').unescape()
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parents: 398
diff changeset
528 u'1 < 2'
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parents: 398
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529
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parents: 398
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530 :return: the unescaped string
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parents: 398
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531 :rtype: `unicode`
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parents: 398
diff changeset
532 :see: `genshi.core.unescape`
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parents: 398
diff changeset
533 """
1
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cmlenz
parents:
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534 if not self:
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parents: 830
diff changeset
535 return ''
1
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cmlenz
parents:
diff changeset
536 return unicode(self).replace('&#34;', '"') \
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
537 .replace('&gt;', '>') \
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
538 .replace('&lt;', '<') \
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
539 .replace('&amp;', '&')
821114ec4f69 Initial import.
cmlenz
parents:
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540
116
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cmlenz
parents: 115
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541 def stripentities(self, keepxmlentities=False):
88ac4c680120 Merged [135:138/branches/experimental/cspeedups].
cmlenz
parents: 115
diff changeset
542 """Return a copy of the text with any character or numeric entities
88ac4c680120 Merged [135:138/branches/experimental/cspeedups].
cmlenz
parents: 115
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543 replaced by the equivalent UTF-8 characters.
88ac4c680120 Merged [135:138/branches/experimental/cspeedups].
cmlenz
parents: 115
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544
88ac4c680120 Merged [135:138/branches/experimental/cspeedups].
cmlenz
parents: 115
diff changeset
545 If the `keepxmlentities` parameter is provided and evaluates to `True`,
500
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parents: 398
diff changeset
546 the core XML entities (``&amp;``, ``&apos;``, ``&gt;``, ``&lt;`` and
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parents: 398
diff changeset
547 ``&quot;``) are not stripped.
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parents: 398
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548
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parents: 398
diff changeset
549 :return: a `Markup` instance with entities removed
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parents: 398
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550 :rtype: `Markup`
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551 :see: `genshi.util.stripentities`
6
5da45906dda7 Simplified implementation of `py:content` directive.
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552 """
116
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parents: 115
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553 return Markup(stripentities(self, keepxmlentities=keepxmlentities))
88ac4c680120 Merged [135:138/branches/experimental/cspeedups].
cmlenz
parents: 115
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554
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parents: 115
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555 def striptags(self):
500
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parents: 398
diff changeset
556 """Return a copy of the text with all XML/HTML tags removed.
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parents: 398
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557
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558 :return: a `Markup` instance with all tags removed
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559 :rtype: `Markup`
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560 :see: `genshi.util.striptags`
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561 """
116
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562 return Markup(striptags(self))
1
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parents:
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563
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parents:
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564
820
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parents: 500
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565 try:
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566 from genshi._speedups import Markup
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cmlenz
parents: 500
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567 except ImportError:
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568 pass # just use the Python implementation
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569
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570
1
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571 escape = Markup.escape
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parents:
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572
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573
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574 def unescape(text):
500
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parents: 398
diff changeset
575 """Reverse-escapes &, <, >, and \" and returns a `unicode` object.
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parents: 398
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576
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diff changeset
577 >>> unescape(Markup('1 &lt; 2'))
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parents: 398
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578 u'1 < 2'
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579
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580 If the provided `text` object is not a `Markup` instance, it is returned
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parents: 398
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581 unchanged.
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582
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parents: 398
diff changeset
583 >>> unescape('1 &lt; 2')
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parents: 398
diff changeset
584 '1 &lt; 2'
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parents: 398
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585
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parents: 398
diff changeset
586 :param text: the text to unescape
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parents: 398
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587 :return: the unescsaped string
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588 :rtype: `unicode`
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parents: 398
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589 """
1
821114ec4f69 Initial import.
cmlenz
parents:
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590 if not isinstance(text, Markup):
821114ec4f69 Initial import.
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parents:
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591 return text
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parents:
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592 return text.unescape()
821114ec4f69 Initial import.
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parents:
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593
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parents:
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594
821114ec4f69 Initial import.
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parents:
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595 class Namespace(object):
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596 """Utility class creating and testing elements with a namespace.
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597
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diff changeset
598 Internally, namespace URIs are encoded in the `QName` of any element or
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
599 attribute, the namespace URI being enclosed in curly braces. This class
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parents: 17
diff changeset
600 helps create and test these strings.
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601
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parents: 17
diff changeset
602 A `Namespace` object is instantiated with the namespace URI.
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parents: 17
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603
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parents: 17
diff changeset
604 >>> html = Namespace('http://www.w3.org/1999/xhtml')
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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605 >>> html
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606 Namespace('http://www.w3.org/1999/xhtml')
18
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607 >>> html.uri
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parents: 17
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608 u'http://www.w3.org/1999/xhtml'
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parents: 17
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609
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cmlenz
parents: 17
diff changeset
610 The `Namespace` object can than be used to generate `QName` objects with
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
611 that namespace:
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parents: 17
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612
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613 >>> html.body
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614 QName('http://www.w3.org/1999/xhtml}body')
18
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parents: 17
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615 >>> html.body.localname
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cmlenz
parents: 17
diff changeset
616 u'body'
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parents: 17
diff changeset
617 >>> html.body.namespace
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parents: 17
diff changeset
618 u'http://www.w3.org/1999/xhtml'
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parents: 17
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619
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cmlenz
parents: 17
diff changeset
620 The same works using item access notation, which is useful for element or
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parents: 17
diff changeset
621 attribute names that are not valid Python identifiers:
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parents: 17
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622
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diff changeset
623 >>> html['body']
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parents: 830
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624 QName('http://www.w3.org/1999/xhtml}body')
18
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parents: 17
diff changeset
625
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parents: 17
diff changeset
626 A `Namespace` object can also be used to test whether a specific `QName`
500
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627 belongs to that namespace using the ``in`` operator:
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parents: 17
diff changeset
628
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parents: 17
diff changeset
629 >>> qname = html.body
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parents: 17
diff changeset
630 >>> qname in html
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parents: 17
diff changeset
631 True
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parents: 17
diff changeset
632 >>> qname in Namespace('http://www.w3.org/2002/06/xhtml2')
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cmlenz
parents: 17
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633 False
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parents: 17
diff changeset
634 """
224
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parents: 204
diff changeset
635 def __new__(cls, uri):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions.
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parents: 204
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636 if type(uri) is cls:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions.
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parents: 204
diff changeset
637 return uri
820
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parents: 500
diff changeset
638 return object.__new__(cls)
224
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parents: 204
diff changeset
639
279
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parents: 278
diff changeset
640 def __getnewargs__(self):
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641 return (self.uri,)
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642
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diff changeset
643 def __getstate__(self):
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644 return self.uri
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parents: 278
diff changeset
645
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646 def __setstate__(self, uri):
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diff changeset
647 self.uri = uri
4b5b4653d41e Some adjustments to make core data structures picklable (requires protocol 2).
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648
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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649 def __init__(self, uri):
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650 self.uri = unicode(uri)
1
821114ec4f69 Initial import.
cmlenz
parents:
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651
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
652 def __contains__(self, qname):
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
653 return qname.namespace == self.uri
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
654
278
8de2620504b9 Fix the handling of namespace context for match templates.
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655 def __ne__(self, other):
8de2620504b9 Fix the handling of namespace context for match templates.
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656 return not self == other
8de2620504b9 Fix the handling of namespace context for match templates.
cmlenz
parents: 230
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657
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
658 def __eq__(self, other):
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
659 if isinstance(other, Namespace):
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
660 return self.uri == other.uri
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
661 return self.uri == other
1
821114ec4f69 Initial import.
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parents:
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662
821114ec4f69 Initial import.
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parents:
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663 def __getitem__(self, name):
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
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664 return QName(self.uri + '}' + name)
1
821114ec4f69 Initial import.
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parents:
diff changeset
665 __getattr__ = __getitem__
821114ec4f69 Initial import.
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parents:
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666
820
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
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667 def __hash__(self):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
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diff changeset
668 return hash(self.uri)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
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parents: 500
diff changeset
669
1
821114ec4f69 Initial import.
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670 def __repr__(self):
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
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671 return '%s(%s)' % (type(self).__name__, stringrepr(self.uri))
1
821114ec4f69 Initial import.
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parents:
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672
821114ec4f69 Initial import.
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parents:
diff changeset
673 def __str__(self):
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
674 return self.uri.encode('utf-8')
1
821114ec4f69 Initial import.
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parents:
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675
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
676 def __unicode__(self):
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
677 return self.uri
1
821114ec4f69 Initial import.
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parents:
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678
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
679
147
f7fb556f2678 Use `xmlcharrefreplace` when encoding the output in `Stream.render()`, so that encoding the output to legacy encodings such as ASCII or ISO-8859-1 should always work.
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680 # The namespace used by attributes such as xml:lang and xml:space
141
b3ceaa35fb6b * No escaping of `<script>` or `<style>` tags in HTML output (see #24)
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diff changeset
681 XML_NAMESPACE = Namespace('http://www.w3.org/XML/1998/namespace')
b3ceaa35fb6b * No escaping of `<script>` or `<style>` tags in HTML output (see #24)
cmlenz
parents: 140
diff changeset
682
b3ceaa35fb6b * No escaping of `<script>` or `<style>` tags in HTML output (see #24)
cmlenz
parents: 140
diff changeset
683
1
821114ec4f69 Initial import.
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parents:
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684 class QName(unicode):
821114ec4f69 Initial import.
cmlenz
parents:
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685 """A qualified element or attribute name.
821114ec4f69 Initial import.
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parents:
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686
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
687 The unicode value of instances of this class contains the qualified name of
820
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
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parents: 500
diff changeset
688 the element or attribute, in the form ``{namespace-uri}local-name``. The
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
689 namespace URI can be obtained through the additional `namespace` attribute,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
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parents: 500
diff changeset
690 while the local name can be accessed through the `localname` attribute.
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
691
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
692 >>> qname = QName('foo')
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
693 >>> qname
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
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diff changeset
694 QName('foo')
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
695 >>> qname.localname
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
696 u'foo'
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
697 >>> qname.namespace
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
698
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
699 >>> qname = QName('http://www.w3.org/1999/xhtml}body')
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
700 >>> qname
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
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diff changeset
701 QName('http://www.w3.org/1999/xhtml}body')
18
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
702 >>> qname.localname
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
703 u'body'
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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parents: 17
diff changeset
704 >>> qname.namespace
4cbebb15a834 Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents: 17
diff changeset
705 u'http://www.w3.org/1999/xhtml'
1
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
706 """
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
707 __slots__ = ['namespace', 'localname']
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
708
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
709 def __new__(cls, qname):
820
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
710 """Create the `QName` instance.
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
711
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
712 :param qname: the qualified name as a string of the form
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
713 ``{namespace-uri}local-name``, where the leading curly
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
714 brace is optional
1837f39efd6f Sync (old) experimental inline branch with trunk@1027.
cmlenz
parents: 500
diff changeset
715 """
100
5e9987f34e6c Ported [111] to trunk.
cmlenz
parents: 96
diff changeset
716 if type(qname) is cls:
1
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
717 return qname
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
718
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
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parents: 830
diff changeset
719 parts = qname.lstrip('{').split('}', 1)
100
5e9987f34e6c Ported [111] to trunk.
cmlenz
parents: 96
diff changeset
720 if len(parts) > 1:
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
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parents: 830
diff changeset
721 self = unicode.__new__(cls, '{%s' % qname)
136
636e0100fcaf Minor performance improvements in serialization.
cmlenz
parents: 133
diff changeset
722 self.namespace, self.localname = map(unicode, parts)
1
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
723 else:
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
724 self = unicode.__new__(cls, qname)
136
636e0100fcaf Minor performance improvements in serialization.
cmlenz
parents: 133
diff changeset
725 self.namespace, self.localname = None, unicode(qname)
1
821114ec4f69 Initial import.
cmlenz
parents:
diff changeset
726 return self
279
4b5b4653d41e Some adjustments to make core data structures picklable (requires protocol 2).
cmlenz
parents: 278
diff changeset
727
4b5b4653d41e Some adjustments to make core data structures picklable (requires protocol 2).
cmlenz
parents: 278
diff changeset
728 def __getnewargs__(self):
4b5b4653d41e Some adjustments to make core data structures picklable (requires protocol 2).
cmlenz
parents: 278
diff changeset
729 return (self.lstrip('{'),)
326
08ada6b4b767 Fixed `__repr__` of the `QName`, `Attrs`, and `Expression` classes so that the output can be used as code to instantiate the object again.
cmlenz
parents: 279
diff changeset
730
08ada6b4b767 Fixed `__repr__` of the `QName`, `Attrs`, and `Expression` classes so that the output can be used as code to instantiate the object again.
cmlenz
parents: 279
diff changeset
731 def __repr__(self):
902
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126].
cmlenz
parents: 830
diff changeset
732 return '%s(%s)' % (type(self).__name__, stringrepr(self.lstrip('{')))
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