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