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annotate env/lib/python3.7/site-packages/lxml/includes/etreepublic.pxd @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 # public Cython/C interface to lxml.etree
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2
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3 from lxml.includes cimport tree
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4 from lxml.includes.tree cimport const_xmlChar
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5
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6 cdef extern from "lxml-version.h":
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7 cdef char* LXML_VERSION_STRING
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8
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9 cdef extern from "etree_defs.h":
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10 # test if c_node is considered an Element (i.e. Element, Comment, etc.)
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11 cdef bint _isElement(tree.xmlNode* c_node) nogil
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12
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13 # return the namespace URI of the node or NULL
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14 cdef const_xmlChar* _getNs(tree.xmlNode* node) nogil
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15
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16 # pair of macros for tree traversal
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17 cdef void BEGIN_FOR_EACH_ELEMENT_FROM(tree.xmlNode* tree_top,
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18 tree.xmlNode* start_node,
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19 int start_node_inclusive) nogil
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20 cdef void END_FOR_EACH_ELEMENT_FROM(tree.xmlNode* start_node) nogil
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21
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22 cdef extern from "etree_api.h":
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23
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24 # first function to call!
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25 cdef int import_lxml__etree() except -1
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26
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27 ##########################################################################
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28 # public ElementTree API classes
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29
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30 cdef class lxml.etree._Document [ object LxmlDocument ]:
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31 cdef tree.xmlDoc* _c_doc
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32
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33 cdef class lxml.etree._Element [ object LxmlElement ]:
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34 cdef _Document _doc
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35 cdef tree.xmlNode* _c_node
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36
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37 cdef class lxml.etree.ElementBase(_Element) [ object LxmlElementBase ]:
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38 pass
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39
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40 cdef class lxml.etree._ElementTree [ object LxmlElementTree ]:
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41 cdef _Document _doc
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42 cdef _Element _context_node
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43
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44 cdef class lxml.etree.ElementClassLookup [ object LxmlElementClassLookup ]:
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45 cdef object (*_lookup_function)(object, _Document, tree.xmlNode*)
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46
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47 cdef class lxml.etree.FallbackElementClassLookup(ElementClassLookup) \
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48 [ object LxmlFallbackElementClassLookup ]:
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49 cdef ElementClassLookup fallback
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50 cdef object (*_fallback_function)(object, _Document, tree.xmlNode*)
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51
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52 ##########################################################################
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53 # creating Element objects
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54
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55 # create an Element for a C-node in the Document
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56 cdef _Element elementFactory(_Document doc, tree.xmlNode* c_node)
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57
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58 # create an ElementTree for an Element
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59 cdef _ElementTree elementTreeFactory(_Element context_node)
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60
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61 # create an ElementTree subclass for an Element
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62 cdef _ElementTree newElementTree(_Element context_node, object subclass)
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63
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64 # create an ElementTree from an external document
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65 cdef _ElementTree adoptExternalDocument(tree.xmlDoc* c_doc, parser, bint is_owned)
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66
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67 # create a new Element for an existing or new document (doc = None)
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68 # builds Python object after setting text, tail, namespaces and attributes
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69 cdef _Element makeElement(tag, _Document doc, parser,
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70 text, tail, attrib, nsmap)
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71
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72 # create a new SubElement for an existing parent
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73 # builds Python object after setting text, tail, namespaces and attributes
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74 cdef _Element makeSubElement(_Element parent, tag, text, tail,
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75 attrib, nsmap)
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76
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77 # deep copy a node to include it in the Document
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78 cdef _Element deepcopyNodeToDocument(_Document doc, tree.xmlNode* c_root)
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79
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80 # set the internal lookup function for Element/Comment/PI classes
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81 # use setElementClassLookupFunction(NULL, None) to reset it
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82 # note that the lookup function *must always* return an _Element subclass!
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83 cdef void setElementClassLookupFunction(
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84 object (*function)(object, _Document, tree.xmlNode*), object state)
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85
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86 # lookup function that always returns the default Element class
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87 # note that the first argument is expected to be None!
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88 cdef object lookupDefaultElementClass(_1, _Document _2,
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89 tree.xmlNode* c_node)
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90
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91 # lookup function for namespace/tag specific Element classes
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92 # note that the first argument is expected to be None!
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93 cdef object lookupNamespaceElementClass(_1, _Document _2,
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94 tree.xmlNode* c_node)
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95
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96 # call the fallback lookup function of a FallbackElementClassLookup
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97 cdef object callLookupFallback(FallbackElementClassLookup lookup,
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98 _Document doc, tree.xmlNode* c_node)
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99
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100 ##########################################################################
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101 # XML attribute access
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102
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103 # return an attribute value for a C attribute on a C element node
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104 cdef object attributeValue(tree.xmlNode* c_element,
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105 tree.xmlAttr* c_attrib_node)
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106
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107 # return the value of the attribute with 'ns' and 'name' (or None)
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108 cdef object attributeValueFromNsName(tree.xmlNode* c_element,
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109 const_xmlChar* c_ns, const_xmlChar* c_name)
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110
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111 # return the value of attribute "{ns}name", or the default value
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112 cdef object getAttributeValue(_Element element, key, default)
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113
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114 # return an iterator over attribute names (1), values (2) or items (3)
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115 # attributes must not be removed during iteration!
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116 cdef object iterattributes(_Element element, int keysvalues)
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117
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118 # return the list of all attribute names (1), values (2) or items (3)
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119 cdef list collectAttributes(tree.xmlNode* c_element, int keysvalues)
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120
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121 # set an attribute value on an element
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122 # on failure, sets an exception and returns -1
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123 cdef int setAttributeValue(_Element element, key, value) except -1
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124
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125 # delete an attribute
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126 # on failure, sets an exception and returns -1
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127 cdef int delAttribute(_Element element, key) except -1
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128
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129 # delete an attribute based on name and namespace URI
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130 # returns -1 if the attribute was not found (no exception)
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131 cdef int delAttributeFromNsName(tree.xmlNode* c_element,
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132 const_xmlChar* c_href, const_xmlChar* c_name)
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133
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134 ##########################################################################
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135 # XML node helper functions
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136
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137 # check if the element has at least one child
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138 cdef bint hasChild(tree.xmlNode* c_node) nogil
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139
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140 # find child element number 'index' (supports negative indexes)
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141 cdef tree.xmlNode* findChild(tree.xmlNode* c_node,
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142 Py_ssize_t index) nogil
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143
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144 # find child element number 'index' starting at first one
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145 cdef tree.xmlNode* findChildForwards(tree.xmlNode* c_node,
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146 Py_ssize_t index) nogil
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147
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148 # find child element number 'index' starting at last one
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149 cdef tree.xmlNode* findChildBackwards(tree.xmlNode* c_node,
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150 Py_ssize_t index) nogil
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151
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152 # return next/previous sibling element of the node
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153 cdef tree.xmlNode* nextElement(tree.xmlNode* c_node) nogil
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154 cdef tree.xmlNode* previousElement(tree.xmlNode* c_node) nogil
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155
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156 ##########################################################################
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157 # iterators (DEPRECATED API, don't use in new code!)
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158
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159 cdef class lxml.etree._ElementTagMatcher [ object LxmlElementTagMatcher ]:
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160 cdef char* _href
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161 cdef char* _name
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162
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163 # store "{ns}tag" (or None) filter for this matcher or element iterator
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164 # ** unless _href *and* _name are set up 'by hand', this function *must*
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165 # ** be called when subclassing the iterator below!
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166 cdef void initTagMatch(_ElementTagMatcher matcher, tag)
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167
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168 cdef class lxml.etree._ElementIterator(_ElementTagMatcher) [
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169 object LxmlElementIterator ]:
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170 cdef _Element _node
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171 cdef tree.xmlNode* (*_next_element)(tree.xmlNode*)
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172
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173 # store the initial node of the iterator if it matches the required tag
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174 # or its next matching sibling if not
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175 cdef void iteratorStoreNext(_ElementIterator iterator, _Element node)
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176
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177 ##########################################################################
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178 # other helper functions
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179
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180 # check if a C node matches a tag name and namespace
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181 # (NULL allowed for each => always matches)
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182 cdef int tagMatches(tree.xmlNode* c_node, const_xmlChar* c_href, const_xmlChar* c_name)
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183
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184 # convert a UTF-8 char* to a Python string or unicode string
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185 cdef object pyunicode(const_xmlChar* s)
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186
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187 # convert the string to UTF-8 using the normal lxml.etree semantics
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188 cdef bytes utf8(object s)
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189
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190 # split a tag into a (URI, name) tuple, return None as URI for '{}tag'
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191 cdef tuple getNsTag(object tag)
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192
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193 # split a tag into a (URI, name) tuple, return b'' as URI for '{}tag'
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194 cdef tuple getNsTagWithEmptyNs(object tag)
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195
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196 # get the "{ns}tag" string for a C node
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197 cdef object namespacedName(tree.xmlNode* c_node)
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198
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199 # get the "{ns}tag" string for a href/tagname pair (c_ns may be NULL)
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200 cdef object namespacedNameFromNsName(const_xmlChar* c_ns, const_xmlChar* c_tag)
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201
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202 # check if the node has a text value (which may be '')
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203 cdef bint hasText(tree.xmlNode* c_node) nogil
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204
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205 # check if the node has a tail value (which may be '')
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206 cdef bint hasTail(tree.xmlNode* c_node) nogil
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207
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208 # get the text content of an element (or None)
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209 cdef object textOf(tree.xmlNode* c_node)
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210
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211 # get the tail content of an element (or None)
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212 cdef object tailOf(tree.xmlNode* c_node)
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213
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214 # set the text value of an element
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215 cdef int setNodeText(tree.xmlNode* c_node, text) except -1
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216
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217 # set the tail text value of an element
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218 cdef int setTailText(tree.xmlNode* c_node, text) except -1
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219
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220 # append an element to the children of a parent element
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221 # deprecated: don't use, does not propagate exceptions!
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222 # use appendChildToElement() instead
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223 cdef void appendChild(_Element parent, _Element child)
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224
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225 # added in lxml 3.3 as a safe replacement for appendChild()
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226 # return -1 for exception, 0 for ok
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227 cdef int appendChildToElement(_Element parent, _Element child) except -1
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228
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229 # recursively lookup a namespace in element or ancestors, or create it
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230 cdef tree.xmlNs* findOrBuildNodeNsPrefix(
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231 _Document doc, tree.xmlNode* c_node, const_xmlChar* href, const_xmlChar* prefix)
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232
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233 # find the Document of an Element, ElementTree or Document (itself!)
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234 cdef _Document documentOrRaise(object input)
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235
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236 # find the root Element of an Element (itself!), ElementTree or Document
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237 cdef _Element rootNodeOrRaise(object input)