1
|
# XML DOM tree manipulation
|
2
|
|
3
|
from xml.dom import Node
|
4
|
import xml.dom.minidom
|
5
|
|
6
|
def name_of(node): return node.tagName.lower()
|
7
|
|
8
|
def get_id(node): return node.getAttribute('id')
|
9
|
|
10
|
def set_id(node, id_): node.setAttribute('id', id_)
|
11
|
|
12
|
class NodeElemIter:
|
13
|
def __init__(self, node): self.child = node.firstChild
|
14
|
|
15
|
def __iter__(self): return self
|
16
|
|
17
|
def curr(self):
|
18
|
while self.child != None:
|
19
|
if self.child.nodeType == Node.ELEMENT_NODE: return self.child
|
20
|
self.child = self.child.nextSibling
|
21
|
raise StopIteration
|
22
|
|
23
|
def next(self):
|
24
|
child = self.curr()
|
25
|
self.child = self.child.nextSibling
|
26
|
return child
|
27
|
|
28
|
def first_elem(node): return NodeElemIter(node).next()
|
29
|
|
30
|
class NodeElemReverseIter:
|
31
|
def __init__(self, node): self.child = node.lastChild
|
32
|
|
33
|
def __iter__(self): return self
|
34
|
|
35
|
def curr(self):
|
36
|
while self.child != None:
|
37
|
if self.child.nodeType == Node.ELEMENT_NODE: return self.child
|
38
|
self.child = self.child.previousSibling
|
39
|
raise StopIteration
|
40
|
|
41
|
def next(self):
|
42
|
child = self.curr()
|
43
|
self.child = self.child.previousSibling
|
44
|
return child
|
45
|
|
46
|
def last_elem(node): return NodeElemReverseIter(node).next()
|
47
|
|
48
|
class NodeParentIter:
|
49
|
def __init__(self, node): self.node = node
|
50
|
|
51
|
def __iter__(self): return self
|
52
|
|
53
|
def curr(self):
|
54
|
if self.node != None and self.node.nodeType == Node.ELEMENT_NODE:
|
55
|
return self.node
|
56
|
raise StopIteration
|
57
|
|
58
|
def next(self):
|
59
|
node = self.curr()
|
60
|
self.node = self.node.parentNode
|
61
|
return node
|
62
|
|
63
|
def is_text(node):
|
64
|
for child in NodeElemIter(node): return False # has an element node
|
65
|
return True
|
66
|
|
67
|
def value(node):
|
68
|
if node.firstChild != None: return node.firstChild.nodeValue
|
69
|
else: return node.nodeValue
|
70
|
|
71
|
def set_value(doc, node, value):
|
72
|
if node.nodeType == Node.ELEMENT_NODE:
|
73
|
node.appendChild(doc.createTextNode(value))
|
74
|
else: node.nodeValue = value
|
75
|
|
76
|
def by_tag_name(node, name, last_only=False):
|
77
|
# last_only optimization returns last (most recently inserted) matching node
|
78
|
children = []
|
79
|
for child in NodeElemReverseIter(node):
|
80
|
if child.tagName == name:
|
81
|
children.append(child)
|
82
|
if last_only: break
|
83
|
return children
|
84
|
|
85
|
_writexml_orig = xml.dom.minidom.Element.writexml
|
86
|
|
87
|
def _writexml(self, writer, indent="", addindent="", newl=""):
|
88
|
if self.firstChild != None and self.firstChild.nextSibling == None\
|
89
|
and self.firstChild.nodeType == Node.TEXT_NODE: # a single text node
|
90
|
writer.write(indent+'<'+self.tagName)
|
91
|
for attr_idx in xrange(self.attributes.length):
|
92
|
attr = self.attributes.item(attr_idx)
|
93
|
writer.write(' '+attr.name+'='+attr.value)
|
94
|
writer.write('>'+value(self)+'</'+self.tagName+'>'+newl)
|
95
|
else: _writexml_orig(self, writer, indent, addindent, newl)
|
96
|
|
97
|
xml.dom.minidom.Element.writexml = _writexml
|