Mercurial > traipse_dev
annotate orpg/minidom.py @ 77:6226a5f9a4b3 ornery-dev
Fixing images from last push
author | sirebral |
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date | Sat, 22 Aug 2009 04:04:25 -0500 |
parents | 551cd440acce |
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1 """\ |
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2 minidom.py -- a lightweight DOM implementation based on SAX. |
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3 |
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4 parse( "foo.xml" ) |
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5 |
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6 parseString( "<foo><bar/></foo>" ) |
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7 |
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8 Todo: |
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9 ===== |
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10 * convenience methods for getting elements and text. |
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11 * more testing |
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12 * bring some of the writer and linearizer code into conformance with this |
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13 interface |
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14 * SAX 2 namespaces |
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15 """ |
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16 |
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17 from orpg import pulldom |
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18 import string |
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19 from StringIO import StringIO |
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20 import types |
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21 |
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22 class Node: |
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23 ELEMENT_NODE = 1 |
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24 ATTRIBUTE_NODE = 2 |
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25 TEXT_NODE = 3 |
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26 CDATA_SECTION_NODE = 4 |
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27 ENTITY_REFERENCE_NODE = 5 |
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28 ENTITY_NODE = 6 |
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29 PROCESSING_INSTRUCTION_NODE = 7 |
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30 COMMENT_NODE = 8 |
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31 DOCUMENT_NODE = 9 |
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32 DOCUMENT_TYPE_NODE = 10 |
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33 DOCUMENT_FRAGMENT_NODE = 11 |
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34 NOTATION_NODE = 12 |
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35 allnodes = {} |
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36 _debug = 0 |
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37 _makeParentNodes = 1 |
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38 debug = None |
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39 |
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40 def __init__(self): |
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41 self.childNodes = [] |
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42 self.ownerDocument = None |
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43 if Node._debug: |
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44 index = repr(id(self)) + repr(self.__class__) |
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45 Node.allnodes[index] = repr(self.__dict__) |
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46 if Node.debug is None: Node.debug = StringIO() |
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47 #open( "debug4.out", "w" ) |
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48 Node.debug.write("create %s\n" % index) |
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49 |
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50 def __getattr__(self, key): |
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51 if key[0:2] == "__": raise AttributeError |
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52 # getattr should never call getattr! |
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53 if self.__dict__.has_key("inGetAttr"): |
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54 del self.inGetAttr |
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55 raise AttributeError, key |
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56 prefix, attrname = key[:5], key[5:] |
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57 if prefix == "_get_": |
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58 self.inGetAttr = 1 |
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59 if hasattr(self, attrname): |
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60 del self.inGetAttr |
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61 return (lambda self=self, attrname=attrname: |
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62 getattr(self, attrname)) |
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63 else: |
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64 del self.inGetAttr |
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65 raise AttributeError, key |
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66 else: |
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67 self.inGetAttr = 1 |
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68 try: func = getattr(self, "_get_" + key) |
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69 except AttributeError: raise AttributeError, key |
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70 del self.inGetAttr |
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71 return func() |
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72 |
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73 def __nonzero__(self): |
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74 return 1 |
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75 |
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76 def toxml(self,pretty=0): |
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77 writer = StringIO() |
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78 self.writexml(writer,pretty) |
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79 return str(writer.getvalue()) |
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80 |
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81 def hasChildNodes(self): |
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82 if self.childNodes: return 1 |
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83 else: return 0 |
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84 |
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85 def getChildren(self): |
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86 return self.childNodes |
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87 |
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88 def _get_firstChild(self): |
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89 if self.hasChildNodes(): return self.childNodes[0] |
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90 else: return None |
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91 |
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92 def _get_lastChild(self): |
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93 return self.childNodes[-1] |
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94 |
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95 def insertBefore(self, newChild, refChild): |
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96 if refChild == None: return self.appendChild(newChild) |
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97 index = self.childNodes.index(refChild) |
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98 self.childNodes.insert(index, newChild) |
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99 if self._makeParentNodes: |
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100 newChild.parentNode = self |
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101 newChild.ownerDocument = self.ownerDocument |
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102 return newChild |
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103 |
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104 def appendChild(self, node): |
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105 if self.childNodes: |
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106 last = self.lastChild |
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107 node.previousSibling = last |
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108 last.nextSibling = node |
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109 else: node.previousSibling = None |
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110 node.nextSibling = None |
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111 node.ownerDocument = self.ownerDocument |
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112 node.parentNode = self |
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113 self.childNodes.append(node) |
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114 return node |
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115 |
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116 def replaceChild(self, newChild, oldChild): |
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117 index = self.childNodes.index(oldChild) |
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118 self.childNodes[index] = newChild |
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119 newChild.ownerDocument = self.ownerDocument |
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120 return oldChild |
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121 |
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122 def removeChild(self, oldChild): |
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123 index = self.childNodes.index(oldChild) |
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124 del self.childNodes[index] |
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125 return oldChild |
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126 |
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127 def cloneNode(self, deep=0): |
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128 newNode = Node() |
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129 if deep: self.deep_clone(newNode) |
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130 return newNode |
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131 |
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132 def deep_clone(self, newNode): |
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133 for child in self.childNodes: |
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134 new_child = child.cloneNode(1) |
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135 newNode.appendChild(new_child) |
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136 |
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137 def normalize(self): |
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138 """Join adjacent Text nodes and delete empty Text nodes |
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139 in the full depth of the sub-tree underneath this Node. |
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140 """ |
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141 i = 0 |
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142 while i < len(self.childNodes): |
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143 cn = self.childNodes[i] |
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144 if cn.nodeType == Node.TEXT_NODE: |
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145 i = i + 1 |
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146 # join adjacent Text nodes |
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147 while i < len(self.childNodes) and self.childNodes[i].nodeType == Node.TEXT_NODE: |
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148 cn.nodeValue = cn.data = cn.data + self.childNodes[i].data |
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149 del self.childNodes[i] |
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150 # delete empty nodes |
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151 if cn.nodeValue.strip() == "": |
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152 i = i - 1 |
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153 del self.childNodes[i] |
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154 continue |
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155 elif cn.nodeType == Node.ELEMENT_NODE: cn.normalize() |
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156 i = i + 1 |
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157 |
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158 def unlink(self): |
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159 self.parentNode = None |
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160 while self.childNodes: |
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161 self.childNodes[-1].unlink() |
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162 del self.childNodes[-1] # probably not most efficient! |
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163 self.childNodes = None |
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164 self.previousSibling = None |
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165 self.nextSibling = None |
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166 if self.attributes: |
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167 for attr in self._attrs.values(): self.removeAttributeNode(attr) |
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168 assert not len(self._attrs) |
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169 assert not len(self._attrsNS) |
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170 if Node._debug: |
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171 index = repr(id(self)) + repr(self.__class__) |
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172 self.debug.write("Deleting: %s\n" % index) |
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173 del Node.allnodes[index] |
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174 |
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175 def _write_data(writer, data): |
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176 "Writes datachars to writer." |
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177 data = string.replace(data, "&", "&") |
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178 data = string.replace(data, "<", "<") |
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179 data = string.replace(data, "\"", """) |
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180 data = string.replace(data, ">", ">") |
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181 writer.write(data) |
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182 |
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183 def _getElementsByTagNameHelper(parent, name, rc): |
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184 for node in parent.childNodes: |
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185 if node.nodeType == Node.ELEMENT_NODE and \ |
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186 (name == "*" or node.tagName == name): |
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187 rc.append(node) |
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188 _getElementsByTagNameHelper(node, name, rc) |
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189 return rc |
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190 |
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191 def _getElementsByTagNameNSHelper(parent, nsURI, localName, rc): |
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192 for node in parent.childNodes: |
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193 if node.nodeType == Node.ELEMENT_NODE: |
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194 if ((localName == "*" or node.tagName == localName) and |
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195 (nsURI == "*" or node.namespaceURI == nsURI)): |
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196 rc.append(node) |
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197 _getElementsByTagNameNSHelper(node, name, rc) |
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198 |
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199 class Attr(Node): |
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200 nodeType = Node.ATTRIBUTE_NODE |
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201 |
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202 def __init__(self, qName, namespaceURI="", localName=None, prefix=None): |
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203 # skip setattr for performance |
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204 self.__dict__["localName"] = localName or qName |
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205 self.__dict__["nodeName"] = self.__dict__["name"] = qName |
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206 self.__dict__["namespaceURI"] = namespaceURI |
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207 self.__dict__["prefix"] = prefix |
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208 self.attributes = None |
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209 Node.__init__(self) |
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210 # nodeValue and value are set elsewhere |
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211 |
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212 def __setattr__(self, name, value): |
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213 if name in ("value", "nodeValue"): self.__dict__["value"] = self.__dict__["nodeValue"] = value |
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214 else: self.__dict__[name] = value |
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215 |
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216 def cloneNode(self, deep=0): |
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217 newNode = Attr(self.__dict__["name"],self.__dict__["namespaceURI"], |
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218 self.__dict__["localName"],self.__dict__["prefix"]) |
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219 newNode.__dict__["value"] = newNode.__dict__["nodeValue"] = self.value |
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220 if deep: self.deep_clone(newNode) |
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221 return newNode |
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222 |
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223 class AttributeList: |
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224 """the attribute list is a transient interface to the underlying |
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225 dictionaries. mutations here will change the underlying element's |
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226 dictionary""" |
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227 def __init__(self, attrs, attrsNS): |
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228 self._attrs = attrs |
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229 self._attrsNS = attrsNS |
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230 self.length = len(self._attrs.keys()) |
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231 |
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232 def copy(self): |
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233 clone = AttributeList(self._attrs.copy(),self._attrsNS.copy()) |
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234 return clone |
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235 |
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236 def item(self, index): |
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237 try: return self[self.keys()[index]] |
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238 except IndexError: return None |
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239 |
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240 def items(self): |
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241 return map(lambda node: (node.tagName, node.value), |
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242 self._attrs.values()) |
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243 |
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244 def itemsNS(self): |
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245 return map(lambda node: ((node.URI, node.localName), node.value), |
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246 self._attrs.values()) |
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247 |
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248 def keys(self): |
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249 return self._attrs.keys() |
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250 |
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251 def keysNS(self): |
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252 return self._attrsNS.keys() |
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253 |
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254 def values(self): |
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255 return self._attrs.values() |
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256 |
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257 def __len__(self): |
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258 return self.length |
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259 |
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260 def __cmp__(self, other): |
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261 if self._attrs is getattr(other, "_attrs", None): return 0 |
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262 else: return cmp(id(self), id(other)) |
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263 |
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264 #FIXME: is it appropriate to return .value? |
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265 def __getitem__(self, attname_or_tuple): |
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266 if type(attname_or_tuple) is types.TupleType: return self._attrsNS[attname_or_tuple] |
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267 else: return self._attrs[attname_or_tuple] |
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268 |
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269 # same as set |
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270 def __setitem__(self, attname, value): |
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271 if type(value) is types.StringType: |
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272 node = Attr(attname) |
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273 node.value=value |
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274 else: |
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275 assert isinstance(value, Attr) or type(value) is types.StringType |
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276 node = value |
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277 old = self._attrs.get(attname, None) |
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278 if old: old.unlink() |
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279 self._attrs[node.name] = node |
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280 self._attrsNS[(node.namespaceURI, node.localName)] = node |
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281 |
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282 def __delitem__(self, attname_or_tuple): |
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283 node = self[attname_or_tuple] |
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284 node.unlink() |
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285 del self._attrs[node.name] |
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286 del self._attrsNS[(node.namespaceURI, node.localName)] |
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287 |
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288 class Element(Node): |
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289 nodeType = Node.ELEMENT_NODE |
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290 |
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291 def __init__(self, tagName, namespaceURI="", prefix="", |
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292 localName=None): |
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293 Node.__init__(self) |
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294 self.tagName = self.nodeName = tagName |
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295 self.localName = localName or tagName |
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296 self.prefix = prefix |
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297 self.namespaceURI = namespaceURI |
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298 self.nodeValue = None |
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299 self._attrs={} # attributes are double-indexed: |
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300 self._attrsNS={}# tagName -> Attribute |
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301 # URI,localName -> Attribute |
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302 # in the future: consider lazy generation of attribute objects |
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303 # this is too tricky for now because of headaches |
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304 # with namespaces. |
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305 |
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306 def cloneNode(self, deep=0): |
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307 newNode = Element(self.tagName,self.namespaceURI,self.prefix,self.localName ) |
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308 keys = self._attrs.keys() |
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309 for k in keys: |
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310 attr = self._attrs[k].cloneNode(1) |
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311 newNode.setAttributeNode(attr) |
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312 if deep: self.deep_clone(newNode) |
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313 return newNode |
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314 |
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315 def _get_tagName(self): |
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316 return str(self.tagName) |
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317 |
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318 def getAttributeKeys(self): |
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319 result = [] |
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320 if self._attrs: return self._attrs.keys() |
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321 else: return None |
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322 |
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323 def getAttribute(self, attname): |
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324 if self.hasAttribute(attname): return str(self._attrs[attname].value) |
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325 else: return "" |
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326 |
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327 def getAttributeNS(self, namespaceURI, localName): |
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328 return self._attrsNS[(namespaceURI, localName)].value |
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329 |
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330 def setAttribute(self, attname, value): |
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331 attr = Attr(attname) |
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332 # for performance |
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333 attr.__dict__["value"] = attr.__dict__["nodeValue"] = value |
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334 self.setAttributeNode(attr) |
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335 |
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336 def setAttributeNS(self, namespaceURI, qualifiedName, value): |
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337 prefix, localname = _nssplit(qualifiedName) |
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338 # for performance |
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339 attr = Attr(qualifiedName, namespaceURI, localname, prefix) |
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340 attr.__dict__["value"] = attr.__dict__["nodeValue"] = value |
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341 self.setAttributeNode(attr) |
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342 # FIXME: return original node if something changed. |
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343 |
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344 def getAttributeNode(self, attrname): |
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345 return self._attrs.get(attrname) |
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346 |
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347 def getAttributeNodeNS(self, namespaceURI, localName): |
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348 return self._attrsNS[(namespaceURI, localName)] |
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349 |
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350 def setAttributeNode(self, attr): |
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351 old = self._attrs.get(attr.name, None) |
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352 if old: old.unlink() |
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353 self._attrs[attr.name] = attr |
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354 self._attrsNS[(attr.namespaceURI, attr.localName)] = attr |
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355 # FIXME: return old value if something changed |
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356 |
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357 def removeAttribute(self, name): |
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358 attr = self._attrs[name] |
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359 self.removeAttributeNode(attr) |
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360 |
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361 def removeAttributeNS(self, namespaceURI, localName): |
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362 attr = self._attrsNS[(namespaceURI, localName)] |
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363 self.removeAttributeNode(attr) |
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364 |
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365 def removeAttributeNode(self, node): |
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366 node.unlink() |
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367 del self._attrs[node.name] |
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368 del self._attrsNS[(node.namespaceURI, node.localName)] |
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369 |
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370 def hasAttribute(self, name): |
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371 return self._attrs.has_key(name) |
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372 |
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373 def hasAttributeNS(self, namespaceURI, localName): |
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374 return self._attrsNS.has_key((namespaceURI, localName)) |
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375 |
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376 def getElementsByTagName(self, name): |
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377 return _getElementsByTagNameHelper(self, name, []) |
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378 |
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379 def getElementsByTagNameNS(self, namespaceURI, localName): |
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380 _getElementsByTagNameNSHelper(self, namespaceURI, localName, []) |
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381 |
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382 def __repr__(self): |
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383 return "<DOM Element: %s at %s>" % (self.tagName, id(self)) |
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384 |
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385 # undocumented |
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386 def writexml(self, writer, tabs=0): |
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387 tab_str = "" |
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388 if tabs: |
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389 tab_str = "\n" + (" "*(tabs-1)) |
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390 tabs += 1 |
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391 writer.write(tab_str + "<" + self.tagName) |
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392 a_names = self._get_attributes().keys() |
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393 a_names.sort() |
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394 |
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395 for a_name in a_names: |
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396 writer.write(" %s=\"" % a_name) |
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397 _write_data(writer, self._get_attributes()[a_name].value) |
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398 writer.write("\"") |
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399 if self.childNodes: |
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400 writer.write(">") |
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401 for node in self.childNodes: |
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402 node.writexml(writer,tabs) |
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403 if self.childNodes[0].nodeType == Node.TEXT_NODE: |
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404 tab_str = "" |
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405 writer.write(tab_str + "</%s>" % self.tagName) |
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406 else: writer.write("/>") |
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407 |
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408 def _get_attributes(self): |
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409 return AttributeList(self._attrs, self._attrsNS) |
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410 |
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411 class Comment(Node): |
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412 nodeType = Node.COMMENT_NODE |
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413 |
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414 def __init__(self, data): |
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415 Node.__init__(self) |
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416 self.data = self.nodeValue = data |
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417 self.nodeName = "#comment" |
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418 self.attributes = None |
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419 |
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420 def writexml(self, writer, tabs=0): |
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421 writer.write("<!--%s-->" % self.data) |
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422 |
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423 def cloneNode(self, deep=0): |
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424 newNode = Comment(self.data) |
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425 if deep: self.deep_clone(newNode) |
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426 return newNode |
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427 |
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428 class ProcessingInstruction(Node): |
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429 nodeType = Node.PROCESSING_INSTRUCTION_NODE |
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430 |
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431 def __init__(self, target, data): |
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432 Node.__init__(self) |
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433 self.target = self.nodeName = target |
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434 self.data = self.nodeValue = data |
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435 self.attributes = None |
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436 |
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437 def writexml(self, writer, tabs=0): |
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438 writer.write("<?%s %s?>" % (self.target, self.data)) |
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439 |
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440 def cloneNode(self, deep=0): |
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441 newNode = ProcessingInstruction(self.target, self.data) |
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442 if deep: self.deep_clone(newNode) |
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443 return newNode |
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444 |
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445 class Text(Node): |
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446 nodeType = Node.TEXT_NODE |
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447 nodeName = "#text" |
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448 |
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449 def __init__(self, data): |
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450 Node.__init__(self) |
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451 self.data = self.nodeValue = data |
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452 self.attributes = None |
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453 |
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454 def __repr__(self): |
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455 if len(self.data) > 10: dotdotdot = "..." |
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456 else: dotdotdot = "" |
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457 return "<DOM Text node \"%s%s\">" % (self.data[0:10], dotdotdot) |
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458 |
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459 def writexml(self, writer, tabs=0): |
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460 _write_data(writer, self.data) |
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461 |
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462 def _get_nodeValue(self): |
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463 return str(self.nodeValue) |
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464 |
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465 def _set_nodeValue(self,data): |
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466 self.data = self.nodeValue = data |
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467 |
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468 def cloneNode(self, deep=0): |
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469 newNode = Text(self.data) |
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470 if deep: self.deep_clone(newNode) |
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471 return newNode |
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472 |
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473 def _nssplit(qualifiedName): |
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474 fields = string.split(qualifiedName,':', 1) |
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475 if len(fields) == 2: return fields |
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476 elif len(fields) == 1: return ('', fields[0]) |
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477 |
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478 class Document(Node): |
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479 nodeType = Node.DOCUMENT_NODE |
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480 documentElement = None |
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481 |
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482 def __init__(self): |
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483 Node.__init__(self) |
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484 self.attributes = None |
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485 self.nodeName = "#document" |
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486 self.nodeValue = None |
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487 self.ownerDocument = self |
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488 |
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489 def appendChild(self, node): |
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490 if node.nodeType == Node.ELEMENT_NODE: |
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491 if self.documentElement: raise TypeError, "Two document elements disallowed" |
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492 else: self.documentElement = node |
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493 Node.appendChild(self, node) |
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494 return node |
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495 createElement = Element |
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496 createTextNode = Text |
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497 createComment = Comment |
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498 createProcessingInstruction = ProcessingInstruction |
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499 createAttribute = Attr |
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500 |
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501 def createElementNS(self, namespaceURI, qualifiedName): |
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502 prefix,localName = _nssplit(qualifiedName) |
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503 return Element(qualifiedName, namespaceURI, prefix, localName) |
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504 |
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505 def createAttributeNS(self, namespaceURI, qualifiedName): |
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506 prefix,localName = _nssplit(qualifiedName) |
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507 return Attr(qualifiedName, namespaceURI, localName, prefix) |
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508 |
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509 def getElementsByTagNameNS(self, namespaceURI, localName): |
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510 _getElementsByTagNameNSHelper(self, namespaceURI, localName) |
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511 |
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512 def unlink(self): |
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513 self.documentElement = None |
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514 Node.unlink(self) |
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515 |
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516 def getElementsByTagName(self, name): |
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517 rc = [] |
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518 _getElementsByTagNameHelper(self, name, rc) |
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519 return rc |
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520 |
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521 def writexml(self, writer): |
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522 for node in self.childNodes: node.writexml(writer) |
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523 |
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524 def _doparse(func, args, kwargs): |
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525 events = apply(func, args, kwargs) |
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526 toktype, rootNode = events.getEvent() |
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527 events.expandNode(rootNode) |
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528 return rootNode |
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529 |
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530 def parse(*args, **kwargs): |
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531 "Parse a file into a DOM by filename or file object" |
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532 return _doparse(pulldom.parse, args, kwargs) |
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533 |
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534 def parseString(*args, **kwargs): |
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535 "Parse a file into a DOM from a string" |
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536 return _doparse(pulldom.parseString, args, kwargs) |