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# public Cython/C interface to lxml.etree
from lxml.includes cimport tree
from lxml.includes.tree cimport const_xmlChar
cdef extern from "lxml-version.h":
cdef char* LXML_VERSION_STRING
cdef extern from "etree_defs.h":
# test if c_node is considered an Element (i.e. Element, Comment, etc.)
cdef bint _isElement(tree.xmlNode* c_node) nogil
# return the namespace URI of the node or NULL
cdef const_xmlChar* _getNs(tree.xmlNode* node) nogil
# pair of macros for tree traversal
cdef void BEGIN_FOR_EACH_ELEMENT_FROM(tree.xmlNode* tree_top,
tree.xmlNode* start_node,
int start_node_inclusive) nogil
cdef void END_FOR_EACH_ELEMENT_FROM(tree.xmlNode* start_node) nogil
cdef extern from "etree_api.h":
# first function to call!
cdef int import_lxml__etree() except -1
##########################################################################
# public ElementTree API classes
cdef class lxml.etree._Document [ object LxmlDocument ]:
cdef tree.xmlDoc* _c_doc
cdef class lxml.etree._Element [ object LxmlElement ]:
cdef _Document _doc
cdef tree.xmlNode* _c_node
cdef class lxml.etree.ElementBase(_Element) [ object LxmlElementBase ]:
pass
cdef class lxml.etree._ElementTree [ object LxmlElementTree ]:
cdef _Document _doc
cdef _Element _context_node
cdef class lxml.etree.ElementClassLookup [ object LxmlElementClassLookup ]:
cdef object (*_lookup_function)(object, _Document, tree.xmlNode*)
cdef class lxml.etree.FallbackElementClassLookup(ElementClassLookup) \
[ object LxmlFallbackElementClassLookup ]:
cdef ElementClassLookup fallback
cdef object (*_fallback_function)(object, _Document, tree.xmlNode*)
##########################################################################
# creating Element objects
# create an Element for a C-node in the Document
cdef _Element elementFactory(_Document doc, tree.xmlNode* c_node)
# create an ElementTree for an Element
cdef _ElementTree elementTreeFactory(_Element context_node)
# create an ElementTree subclass for an Element
cdef _ElementTree newElementTree(_Element context_node, object subclass)
# create an ElementTree from an external document
cdef _ElementTree adoptExternalDocument(tree.xmlDoc* c_doc, parser, bint is_owned)
# create a new Element for an existing or new document (doc = None)
# builds Python object after setting text, tail, namespaces and attributes
cdef _Element makeElement(tag, _Document doc, parser,
text, tail, attrib, nsmap)
# create a new SubElement for an existing parent
# builds Python object after setting text, tail, namespaces and attributes
cdef _Element makeSubElement(_Element parent, tag, text, tail,
attrib, nsmap)
# deep copy a node to include it in the Document
cdef _Element deepcopyNodeToDocument(_Document doc, tree.xmlNode* c_root)
# set the internal lookup function for Element/Comment/PI classes
# use setElementClassLookupFunction(NULL, None) to reset it
# note that the lookup function *must always* return an _Element subclass!
cdef void setElementClassLookupFunction(
object (*function)(object, _Document, tree.xmlNode*), object state)
# lookup function that always returns the default Element class
# note that the first argument is expected to be None!
cdef object lookupDefaultElementClass(_1, _Document _2,
tree.xmlNode* c_node)
# lookup function for namespace/tag specific Element classes
# note that the first argument is expected to be None!
cdef object lookupNamespaceElementClass(_1, _Document _2,
tree.xmlNode* c_node)
# call the fallback lookup function of a FallbackElementClassLookup
cdef object callLookupFallback(FallbackElementClassLookup lookup,
_Document doc, tree.xmlNode* c_node)
##########################################################################
# XML attribute access
# return an attribute value for a C attribute on a C element node
cdef object attributeValue(tree.xmlNode* c_element,
tree.xmlAttr* c_attrib_node)
# return the value of the attribute with 'ns' and 'name' (or None)
cdef object attributeValueFromNsName(tree.xmlNode* c_element,
const_xmlChar* c_ns, const_xmlChar* c_name)
# return the value of attribute "{ns}name", or the default value
cdef object getAttributeValue(_Element element, key, default)
# return an iterator over attribute names (1), values (2) or items (3)
# attributes must not be removed during iteration!
cdef object iterattributes(_Element element, int keysvalues)
# return the list of all attribute names (1), values (2) or items (3)
cdef list collectAttributes(tree.xmlNode* c_element, int keysvalues)
# set an attribute value on an element
# on failure, sets an exception and returns -1
cdef int setAttributeValue(_Element element, key, value) except -1
# delete an attribute
# on failure, sets an exception and returns -1
cdef int delAttribute(_Element element, key) except -1
# delete an attribute based on name and namespace URI
# returns -1 if the attribute was not found (no exception)
cdef int delAttributeFromNsName(tree.xmlNode* c_element,
const_xmlChar* c_href, const_xmlChar* c_name)
##########################################################################
# XML node helper functions
# check if the element has at least one child
cdef bint hasChild(tree.xmlNode* c_node) nogil
# find child element number 'index' (supports negative indexes)
cdef tree.xmlNode* findChild(tree.xmlNode* c_node,
Py_ssize_t index) nogil
# find child element number 'index' starting at first one
cdef tree.xmlNode* findChildForwards(tree.xmlNode* c_node,
Py_ssize_t index) nogil
# find child element number 'index' starting at last one
cdef tree.xmlNode* findChildBackwards(tree.xmlNode* c_node,
Py_ssize_t index) nogil
# return next/previous sibling element of the node
cdef tree.xmlNode* nextElement(tree.xmlNode* c_node) nogil
cdef tree.xmlNode* previousElement(tree.xmlNode* c_node) nogil
##########################################################################
# iterators (DEPRECATED API, don't use in new code!)
cdef class lxml.etree._ElementTagMatcher [ object LxmlElementTagMatcher ]:
cdef char* _href
cdef char* _name
# store "{ns}tag" (or None) filter for this matcher or element iterator
# ** unless _href *and* _name are set up 'by hand', this function *must*
# ** be called when subclassing the iterator below!
cdef void initTagMatch(_ElementTagMatcher matcher, tag)
cdef class lxml.etree._ElementIterator(_ElementTagMatcher) [
object LxmlElementIterator ]:
cdef _Element _node
cdef tree.xmlNode* (*_next_element)(tree.xmlNode*)
# store the initial node of the iterator if it matches the required tag
# or its next matching sibling if not
cdef void iteratorStoreNext(_ElementIterator iterator, _Element node)
##########################################################################
# other helper functions
# check if a C node matches a tag name and namespace
# (NULL allowed for each => always matches)
cdef int tagMatches(tree.xmlNode* c_node, const_xmlChar* c_href, const_xmlChar* c_name)
# convert a UTF-8 char* to a Python string or unicode string
cdef object pyunicode(const_xmlChar* s)
# convert the string to UTF-8 using the normal lxml.etree semantics
cdef bytes utf8(object s)
# split a tag into a (URI, name) tuple, return None as URI for '{}tag'
cdef tuple getNsTag(object tag)
# split a tag into a (URI, name) tuple, return b'' as URI for '{}tag'
cdef tuple getNsTagWithEmptyNs(object tag)
# get the "{ns}tag" string for a C node
cdef object namespacedName(tree.xmlNode* c_node)
# get the "{ns}tag" string for a href/tagname pair (c_ns may be NULL)
cdef object namespacedNameFromNsName(const_xmlChar* c_ns, const_xmlChar* c_tag)
# check if the node has a text value (which may be '')
cdef bint hasText(tree.xmlNode* c_node) nogil
# check if the node has a tail value (which may be '')
cdef bint hasTail(tree.xmlNode* c_node) nogil
# get the text content of an element (or None)
cdef object textOf(tree.xmlNode* c_node)
# get the tail content of an element (or None)
cdef object tailOf(tree.xmlNode* c_node)
# set the text value of an element
cdef int setNodeText(tree.xmlNode* c_node, text) except -1
# set the tail text value of an element
cdef int setTailText(tree.xmlNode* c_node, text) except -1
# append an element to the children of a parent element
# deprecated: don't use, does not propagate exceptions!
# use appendChildToElement() instead
cdef void appendChild(_Element parent, _Element child)
# added in lxml 3.3 as a safe replacement for appendChild()
# return -1 for exception, 0 for ok
cdef int appendChildToElement(_Element parent, _Element child) except -1
# recursively lookup a namespace in element or ancestors, or create it
cdef tree.xmlNs* findOrBuildNodeNsPrefix(
_Document doc, tree.xmlNode* c_node, const_xmlChar* href, const_xmlChar* prefix)
# find the Document of an Element, ElementTree or Document (itself!)
cdef _Document documentOrRaise(object input)
# find the root Element of an Element (itself!), ElementTree or Document
cdef _Element rootNodeOrRaise(object input)
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