mirror of
https://gitlab.gnome.org/GNOME/libxml2.git
synced 2025-10-30 10:45:36 +03:00
789 lines
24 KiB
Python
789 lines
24 KiB
Python
import libxml2mod
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import types
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import sys
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# The root of all libxml2 errors.
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class libxmlError(Exception): pass
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# Type of the wrapper class for the C objects wrappers
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def checkWrapper(obj):
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try:
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n = type(_obj).__name__
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if n != 'PyCObject' and n != 'PyCapsule':
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return 1
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except:
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return 0
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return 0
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#
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# id() is sometimes negative ...
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#
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def pos_id(o):
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i = id(o)
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if (i < 0):
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return (sys.maxsize - i)
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return i
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#
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# Errors raised by the wrappers when some tree handling failed.
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#
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class treeError(libxmlError):
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def __init__(self, msg):
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self.msg = msg
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def __str__(self):
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return self.msg
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class parserError(libxmlError):
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def __init__(self, msg):
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self.msg = msg
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def __str__(self):
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return self.msg
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class uriError(libxmlError):
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def __init__(self, msg):
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self.msg = msg
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def __str__(self):
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return self.msg
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class xpathError(libxmlError):
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def __init__(self, msg):
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self.msg = msg
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def __str__(self):
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return self.msg
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class ioWrapper:
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def __init__(self, _obj):
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self.__io = _obj
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self._o = None
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def io_close(self):
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if self.__io == None:
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return(-1)
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self.__io.close()
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self.__io = None
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return(0)
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def io_flush(self):
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if self.__io == None:
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return(-1)
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self.__io.flush()
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return(0)
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def io_read(self, len = -1):
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if self.__io == None:
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return(-1)
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try:
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if len < 0:
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ret = self.__io.read()
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else:
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ret = self.__io.read(len)
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except Exception:
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import sys
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e = sys.exc_info()[1]
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print("failed to read from Python:", type(e))
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print("on IO:", self.__io)
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self.__io == None
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return(-1)
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return(ret)
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def io_write(self, str, len = -1):
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if self.__io == None:
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return(-1)
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if len < 0:
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return(self.__io.write(str))
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return(self.__io.write(str, len))
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class ioReadWrapper(ioWrapper):
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def __init__(self, _obj, enc = ""):
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ioWrapper.__init__(self, _obj)
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self._o = libxml2mod.xmlCreateInputBuffer(self, enc)
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def __del__(self):
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print("__del__")
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self.io_close()
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if self._o != None:
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libxml2mod.xmlFreeParserInputBuffer(self._o)
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self._o = None
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def close(self):
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self.io_close()
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if self._o != None:
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libxml2mod.xmlFreeParserInputBuffer(self._o)
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self._o = None
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class ioWriteWrapper(ioWrapper):
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def __init__(self, _obj, enc = ""):
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# print "ioWriteWrapper.__init__", _obj
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if type(_obj) == type(''):
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print("write io from a string")
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self.o = None
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elif type(_obj).__name__ == 'PyCapsule':
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file = libxml2mod.outputBufferGetPythonFile(_obj)
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if file != None:
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ioWrapper.__init__(self, file)
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else:
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ioWrapper.__init__(self, _obj)
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self._o = _obj
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# elif type(_obj) == types.InstanceType:
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# print(("write io from instance of %s" % (_obj.__class__)))
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# ioWrapper.__init__(self, _obj)
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# self._o = libxml2mod.xmlCreateOutputBuffer(self, enc)
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else:
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file = libxml2mod.outputBufferGetPythonFile(_obj)
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if file != None:
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ioWrapper.__init__(self, file)
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else:
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ioWrapper.__init__(self, _obj)
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self._o = _obj
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def __del__(self):
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# print "__del__"
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self.io_close()
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if self._o != None:
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libxml2mod.xmlOutputBufferClose(self._o)
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self._o = None
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def flush(self):
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self.io_flush()
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if self._o != None:
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libxml2mod.xmlOutputBufferClose(self._o)
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self._o = None
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def close(self):
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self.io_flush()
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if self._o != None:
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libxml2mod.xmlOutputBufferClose(self._o)
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self._o = None
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#
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# Example of a class to handle SAX events
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#
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class SAXCallback:
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"""Base class for SAX handlers"""
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def startDocument(self):
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"""called at the start of the document"""
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pass
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def endDocument(self):
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"""called at the end of the document"""
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pass
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def startElement(self, tag, attrs):
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"""called at the start of every element, tag is the name of
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the element, attrs is a dictionary of the element's attributes"""
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pass
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def endElement(self, tag):
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"""called at the start of every element, tag is the name of
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the element"""
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pass
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def characters(self, data):
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"""called when character data have been read, data is the string
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containing the data, multiple consecutive characters() callback
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are possible."""
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pass
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def cdataBlock(self, data):
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"""called when CDATA section have been read, data is the string
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containing the data, multiple consecutive cdataBlock() callback
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are possible."""
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pass
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def reference(self, name):
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"""called when an entity reference has been found"""
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pass
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def ignorableWhitespace(self, data):
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"""called when potentially ignorable white spaces have been found"""
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pass
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def processingInstruction(self, target, data):
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"""called when a PI has been found, target contains the PI name and
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data is the associated data in the PI"""
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pass
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def comment(self, content):
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"""called when a comment has been found, content contains the comment"""
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pass
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def externalSubset(self, name, externalID, systemID):
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"""called when a DOCTYPE declaration has been found, name is the
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DTD name and externalID, systemID are the DTD public and system
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identifier for that DTd if available"""
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pass
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def internalSubset(self, name, externalID, systemID):
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"""called when a DOCTYPE declaration has been found, name is the
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DTD name and externalID, systemID are the DTD public and system
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identifier for that DTD if available"""
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pass
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def entityDecl(self, name, type, externalID, systemID, content):
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"""called when an ENTITY declaration has been found, name is the
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entity name and externalID, systemID are the entity public and
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system identifier for that entity if available, type indicates
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the entity type, and content reports it's string content"""
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pass
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def notationDecl(self, name, externalID, systemID):
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"""called when an NOTATION declaration has been found, name is the
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notation name and externalID, systemID are the notation public and
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system identifier for that notation if available"""
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pass
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def attributeDecl(self, elem, name, type, defi, defaultValue, nameList):
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"""called when an ATTRIBUTE definition has been found"""
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pass
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def elementDecl(self, name, type, content):
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"""called when an ELEMENT definition has been found"""
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pass
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def entityDecl(self, name, publicId, systemID, notationName):
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"""called when an unparsed ENTITY declaration has been found,
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name is the entity name and publicId,, systemID are the entity
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public and system identifier for that entity if available,
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and notationName indicate the associated NOTATION"""
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pass
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def warning(self, msg):
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#print msg
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pass
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def error(self, msg):
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raise parserError(msg)
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def fatalError(self, msg):
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raise parserError(msg)
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#
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# This class is the ancestor of all the Node classes. It provides
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# the basic functionalities shared by all nodes (and handle
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# gracefylly the exception), like name, navigation in the tree,
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# doc reference, content access and serializing to a string or URI
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#
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class xmlCore:
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def __init__(self, _obj=None):
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if _obj != None:
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self._o = _obj;
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return
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self._o = None
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def __eq__(self, other):
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if other == None:
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return False
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ret = libxml2mod.compareNodesEqual(self._o, other._o)
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if ret == None:
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return False
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return ret == True
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def __ne__(self, other):
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if other == None:
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return True
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ret = libxml2mod.compareNodesEqual(self._o, other._o)
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return not ret
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def __hash__(self):
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ret = libxml2mod.nodeHash(self._o)
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return ret
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def __str__(self):
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return self.serialize()
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def get_parent(self):
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ret = libxml2mod.parent(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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def get_children(self):
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ret = libxml2mod.children(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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def get_last(self):
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ret = libxml2mod.last(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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def get_next(self):
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ret = libxml2mod.next(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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def get_properties(self):
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ret = libxml2mod.properties(self._o)
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if ret == None:
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return None
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return xmlAttr(_obj=ret)
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def get_prev(self):
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ret = libxml2mod.prev(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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def get_content(self):
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return libxml2mod.xmlNodeGetContent(self._o)
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getContent = get_content # why is this duplicate naming needed ?
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def get_name(self):
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return libxml2mod.name(self._o)
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def get_type(self):
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return libxml2mod.type(self._o)
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def get_doc(self):
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ret = libxml2mod.doc(self._o)
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if ret == None:
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if self.type in ["document_xml", "document_html"]:
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return xmlDoc(_obj=self._o)
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else:
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return None
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return xmlDoc(_obj=ret)
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#
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# Those are common attributes to nearly all type of nodes
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# defined as python2 properties
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#
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import sys
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if float(sys.version[0:3]) < 2.2:
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def __getattr__(self, attr):
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if attr == "parent":
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ret = libxml2mod.parent(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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elif attr == "properties":
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ret = libxml2mod.properties(self._o)
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if ret == None:
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return None
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return xmlAttr(_obj=ret)
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elif attr == "children":
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ret = libxml2mod.children(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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elif attr == "last":
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ret = libxml2mod.last(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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elif attr == "next":
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ret = libxml2mod.next(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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elif attr == "prev":
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ret = libxml2mod.prev(self._o)
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if ret == None:
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return None
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return nodeWrap(ret)
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elif attr == "content":
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return libxml2mod.xmlNodeGetContent(self._o)
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elif attr == "name":
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return libxml2mod.name(self._o)
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elif attr == "type":
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return libxml2mod.type(self._o)
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elif attr == "doc":
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ret = libxml2mod.doc(self._o)
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if ret == None:
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if self.type == "document_xml" or self.type == "document_html":
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return xmlDoc(_obj=self._o)
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else:
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return None
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return xmlDoc(_obj=ret)
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raise AttributeError(attr)
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else:
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parent = property(get_parent, None, None, "Parent node")
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children = property(get_children, None, None, "First child node")
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last = property(get_last, None, None, "Last sibling node")
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next = property(get_next, None, None, "Next sibling node")
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prev = property(get_prev, None, None, "Previous sibling node")
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properties = property(get_properties, None, None, "List of properties")
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content = property(get_content, None, None, "Content of this node")
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name = property(get_name, None, None, "Node name")
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type = property(get_type, None, None, "Node type")
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doc = property(get_doc, None, None, "The document this node belongs to")
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#
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# Serialization routines, the optional arguments have the following
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# meaning:
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# encoding: string to ask saving in a specific encoding
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# indent: if 1 the serializer is asked to indent the output
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#
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def serialize(self, encoding = None, format = 0):
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return libxml2mod.serializeNode(self._o, encoding, format)
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def saveTo(self, file, encoding = None, format = 0):
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return libxml2mod.saveNodeTo(self._o, file, encoding, format)
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#
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# Canonicalization routines:
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#
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# nodes: the node set (tuple or list) to be included in the
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# canonized image or None if all document nodes should be
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# included.
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# exclusive: the exclusive flag (0 - non-exclusive
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# canonicalization; otherwise - exclusive canonicalization)
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# prefixes: the list of inclusive namespace prefixes (strings),
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# or None if there is no inclusive namespaces (only for
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# exclusive canonicalization, ignored otherwise)
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# with_comments: include comments in the result (!=0) or not
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# (==0)
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def c14nMemory(self,
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nodes=None,
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exclusive=0,
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prefixes=None,
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with_comments=0):
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if nodes:
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nodes = [n._o for n in nodes]
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return libxml2mod.xmlC14NDocDumpMemory(
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self.get_doc()._o,
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nodes,
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exclusive != 0,
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prefixes,
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with_comments != 0)
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def c14nSaveTo(self,
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file,
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nodes=None,
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exclusive=0,
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prefixes=None,
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with_comments=0):
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if nodes:
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nodes = [n._o for n in nodes]
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return libxml2mod.xmlC14NDocSaveTo(
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self.get_doc()._o,
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nodes,
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exclusive != 0,
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prefixes,
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with_comments != 0,
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file)
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#
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# Selecting nodes using XPath, a bit slow because the context
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# is allocated/freed every time but convenient.
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#
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def xpathEval(self, expr):
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doc = self.doc
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if doc == None:
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return None
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ctxt = doc.xpathNewContext()
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ctxt.setContextNode(self)
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res = ctxt.xpathEval(expr)
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ctxt.xpathFreeContext()
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return res
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# #
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# # Selecting nodes using XPath, faster because the context
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# # is allocated just once per xmlDoc.
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# #
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# # Removed: DV memleaks c.f. #126735
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# #
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# def xpathEval2(self, expr):
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# doc = self.doc
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# if doc == None:
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# return None
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# try:
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# doc._ctxt.setContextNode(self)
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# except:
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# doc._ctxt = doc.xpathNewContext()
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# doc._ctxt.setContextNode(self)
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# res = doc._ctxt.xpathEval(expr)
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# return res
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def xpathEval2(self, expr):
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return self.xpathEval(expr)
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# Remove namespaces
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def removeNsDef(self, href):
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"""
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Remove a namespace definition from a node. If href is None,
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remove all of the ns definitions on that node. The removed
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namespaces are returned as a linked list.
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Note: If any child nodes referred to the removed namespaces,
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they will be left with dangling links. You should call
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renconciliateNs() to fix those pointers.
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Note: This method does not free memory taken by the ns
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definitions. You will need to free it manually with the
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freeNsList() method on the returns xmlNs object.
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"""
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ret = libxml2mod.xmlNodeRemoveNsDef(self._o, href)
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if ret is None:return None
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__tmp = xmlNs(_obj=ret)
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return __tmp
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# support for python2 iterators
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def walk_depth_first(self):
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return xmlCoreDepthFirstItertor(self)
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def walk_breadth_first(self):
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return xmlCoreBreadthFirstItertor(self)
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__iter__ = walk_depth_first
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|
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def free(self):
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try:
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self.doc._ctxt.xpathFreeContext()
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except:
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pass
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libxml2mod.xmlFreeDoc(self._o)
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|
|
|
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#
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# implements the depth-first iterator for libxml2 DOM tree
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#
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class xmlCoreDepthFirstItertor:
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def __init__(self, node):
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self.node = node
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self.parents = []
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def __iter__(self):
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return self
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def __next__(self):
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while 1:
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if self.node:
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ret = self.node
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self.parents.append(self.node)
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self.node = self.node.children
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return ret
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try:
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parent = self.parents.pop()
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except IndexError:
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raise StopIteration
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self.node = parent.next
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next = __next__
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|
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#
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# implements the breadth-first iterator for libxml2 DOM tree
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#
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class xmlCoreBreadthFirstItertor:
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def __init__(self, node):
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self.node = node
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self.parents = []
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def __iter__(self):
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|
return self
|
|
def __next__(self):
|
|
while 1:
|
|
if self.node:
|
|
ret = self.node
|
|
self.parents.append(self.node)
|
|
self.node = self.node.next
|
|
return ret
|
|
try:
|
|
parent = self.parents.pop()
|
|
except IndexError:
|
|
raise StopIteration
|
|
self.node = parent.children
|
|
next = __next__
|
|
|
|
#
|
|
# converters to present a nicer view of the XPath returns
|
|
#
|
|
def nodeWrap(o):
|
|
# TODO try to cast to the most appropriate node class
|
|
name = libxml2mod.type(o)
|
|
if name == "element" or name == "text":
|
|
return xmlNode(_obj=o)
|
|
if name == "attribute":
|
|
return xmlAttr(_obj=o)
|
|
if name[0:8] == "document":
|
|
return xmlDoc(_obj=o)
|
|
if name == "namespace":
|
|
return xmlNs(_obj=o)
|
|
if name == "elem_decl":
|
|
return xmlElement(_obj=o)
|
|
if name == "attribute_decl":
|
|
return xmlAttribute(_obj=o)
|
|
if name == "entity_decl":
|
|
return xmlEntity(_obj=o)
|
|
if name == "dtd":
|
|
return xmlDtd(_obj=o)
|
|
return xmlNode(_obj=o)
|
|
|
|
def xpathObjectRet(o):
|
|
otype = type(o)
|
|
if otype == type([]):
|
|
ret = list(map(xpathObjectRet, o))
|
|
return ret
|
|
elif otype == type(()):
|
|
ret = list(map(xpathObjectRet, o))
|
|
return tuple(ret)
|
|
elif otype == type('') or otype == type(0) or otype == type(0.0):
|
|
return o
|
|
else:
|
|
return nodeWrap(o)
|
|
|
|
#
|
|
# register an XPath function
|
|
#
|
|
def registerXPathFunction(ctxt, name, ns_uri, f):
|
|
ret = libxml2mod.xmlRegisterXPathFunction(ctxt, name, ns_uri, f)
|
|
|
|
#
|
|
# For the xmlTextReader parser configuration
|
|
#
|
|
PARSER_LOADDTD=1
|
|
PARSER_DEFAULTATTRS=2
|
|
PARSER_VALIDATE=3
|
|
PARSER_SUBST_ENTITIES=4
|
|
|
|
#
|
|
# For the error callback severities
|
|
#
|
|
PARSER_SEVERITY_VALIDITY_WARNING=1
|
|
PARSER_SEVERITY_VALIDITY_ERROR=2
|
|
PARSER_SEVERITY_WARNING=3
|
|
PARSER_SEVERITY_ERROR=4
|
|
|
|
#
|
|
# register the libxml2 error handler
|
|
#
|
|
def registerErrorHandler(f, ctx):
|
|
"""Register a Python written function to for error reporting.
|
|
The function is called back as f(ctx, error). """
|
|
import sys
|
|
if 'libxslt' not in sys.modules:
|
|
# normal behaviour when libxslt is not imported
|
|
ret = libxml2mod.xmlRegisterErrorHandler(f,ctx)
|
|
else:
|
|
# when libxslt is already imported, one must
|
|
# use libxst's error handler instead
|
|
import libxslt
|
|
ret = libxslt.registerErrorHandler(f,ctx)
|
|
return ret
|
|
|
|
class parserCtxtCore:
|
|
|
|
def __init__(self, _obj=None):
|
|
if _obj != None:
|
|
self._o = _obj;
|
|
return
|
|
self._o = None
|
|
|
|
def __del__(self):
|
|
if self._o != None:
|
|
libxml2mod.xmlFreeParserCtxt(self._o)
|
|
self._o = None
|
|
|
|
def setErrorHandler(self,f,arg):
|
|
"""Register an error handler that will be called back as
|
|
f(arg,msg,severity,reserved).
|
|
|
|
@reserved is currently always None."""
|
|
libxml2mod.xmlParserCtxtSetErrorHandler(self._o,f,arg)
|
|
|
|
def getErrorHandler(self):
|
|
"""Return (f,arg) as previously registered with setErrorHandler
|
|
or (None,None)."""
|
|
return libxml2mod.xmlParserCtxtGetErrorHandler(self._o)
|
|
|
|
def addLocalCatalog(self, uri):
|
|
"""Register a local catalog with the parser"""
|
|
return libxml2mod.addLocalCatalog(self._o, uri)
|
|
|
|
|
|
class ValidCtxtCore:
|
|
|
|
def __init__(self, *args, **kw):
|
|
pass
|
|
|
|
def setValidityErrorHandler(self, err_func, warn_func, arg=None):
|
|
"""
|
|
Register error and warning handlers for DTD validation.
|
|
These will be called back as f(msg,arg)
|
|
"""
|
|
libxml2mod.xmlSetValidErrors(self._o, err_func, warn_func, arg)
|
|
|
|
|
|
class SchemaValidCtxtCore:
|
|
|
|
def __init__(self, *args, **kw):
|
|
pass
|
|
|
|
def setValidityErrorHandler(self, err_func, warn_func, arg=None):
|
|
"""
|
|
Register error and warning handlers for Schema validation.
|
|
These will be called back as f(msg,arg)
|
|
"""
|
|
libxml2mod.xmlSchemaSetValidErrors(self._o, err_func, warn_func, arg)
|
|
|
|
|
|
class relaxNgValidCtxtCore:
|
|
|
|
def __init__(self, *args, **kw):
|
|
pass
|
|
|
|
def setValidityErrorHandler(self, err_func, warn_func, arg=None):
|
|
"""
|
|
Register error and warning handlers for RelaxNG validation.
|
|
These will be called back as f(msg,arg)
|
|
"""
|
|
libxml2mod.xmlRelaxNGSetValidErrors(self._o, err_func, warn_func, arg)
|
|
|
|
|
|
def _xmlTextReaderErrorFunc(xxx_todo_changeme,msg,severity,locator):
|
|
"""Intermediate callback to wrap the locator"""
|
|
(f,arg) = xxx_todo_changeme
|
|
return f(arg,msg,severity,xmlTextReaderLocator(locator))
|
|
|
|
class xmlTextReaderCore:
|
|
|
|
def __init__(self, _obj=None):
|
|
self.input = None
|
|
if _obj != None:self._o = _obj;return
|
|
self._o = None
|
|
|
|
def __del__(self):
|
|
if self._o != None:
|
|
libxml2mod.xmlFreeTextReader(self._o)
|
|
self._o = None
|
|
|
|
def SetErrorHandler(self,f,arg):
|
|
"""Register an error handler that will be called back as
|
|
f(arg,msg,severity,locator)."""
|
|
if f is None:
|
|
libxml2mod.xmlTextReaderSetErrorHandler(\
|
|
self._o,None,None)
|
|
else:
|
|
libxml2mod.xmlTextReaderSetErrorHandler(\
|
|
self._o,_xmlTextReaderErrorFunc,(f,arg))
|
|
|
|
def GetErrorHandler(self):
|
|
"""Return (f,arg) as previously registered with setErrorHandler
|
|
or (None,None)."""
|
|
f,arg = libxml2mod.xmlTextReaderGetErrorHandler(self._o)
|
|
if f is None:
|
|
return None,None
|
|
else:
|
|
# assert f is _xmlTextReaderErrorFunc
|
|
return arg
|
|
|
|
#
|
|
# The cleanup now goes though a wrapper in libxml.c
|
|
#
|
|
def cleanupParser():
|
|
libxml2mod.xmlPythonCleanupParser()
|
|
|
|
#
|
|
# The interface to xmlRegisterInputCallbacks.
|
|
# Since this API does not allow to pass a data object along with
|
|
# match/open callbacks, it is necessary to maintain a list of all
|
|
# Python callbacks.
|
|
#
|
|
__input_callbacks = []
|
|
def registerInputCallback(func):
|
|
def findOpenCallback(URI):
|
|
for cb in reversed(__input_callbacks):
|
|
o = cb(URI)
|
|
if o is not None:
|
|
return o
|
|
libxml2mod.xmlRegisterInputCallback(findOpenCallback)
|
|
__input_callbacks.append(func)
|
|
|
|
def popInputCallbacks():
|
|
# First pop python-level callbacks, when no more available - start
|
|
# popping built-in ones.
|
|
if len(__input_callbacks) > 0:
|
|
__input_callbacks.pop()
|
|
if len(__input_callbacks) == 0:
|
|
libxml2mod.xmlUnregisterInputCallback()
|
|
|
|
# WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
|
|
#
|
|
# Everything before this line comes from libxml.py
|
|
# Everything after this line is automatically generated
|
|
#
|
|
# WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
|
|
|