1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
"""
Parsers for SGML and XML to dom.
"""
import sgmllib, xml.sax.handler
from dom import *
class Parser:
def __init__(self):
self.tree = Tree()
self.node = self.tree
self.nodes = []
def line(self, id, lineno, colno):
while self.nodes:
n = self.nodes.pop()
n._line(id, lineno, colno)
def add(self, node):
self.node.add(node)
self.nodes.append(node)
def start(self, name, attrs):
tag = Tag(name, *attrs)
self.add(tag)
self.node = tag
def end(self, name):
self.balance(name)
self.node = self.node.parent
def data(self, data):
children = self.node.children
if children and isinstance(children[-1], Data):
children[-1].data += data
else:
self.add(Data(data))
def comment(self, comment):
self.add(Comment(comment))
def entity(self, ref):
self.add(Entity(ref))
def character(self, ref):
self.add(Character(ref))
def balance(self, name = None):
while self.node != self.tree and name != self.node.name:
self.node.parent.extend(self.node.children)
del self.node.children[:]
self.node.singleton = True
self.node = self.node.parent
class SGMLParser(sgmllib.SGMLParser):
def __init__(self, entitydefs = None):
sgmllib.SGMLParser.__init__(self)
if entitydefs == None:
self.entitydefs = {}
else:
self.entitydefs = entitydefs
self.parser = Parser()
def unknown_starttag(self, name, attrs):
self.parser.start(name, attrs)
def handle_data(self, data):
self.parser.data(data)
def handle_comment(self, comment):
self.parser.comment(comment)
def unknown_entityref(self, ref):
self.parser.entity(ref)
def unknown_charref(self, ref):
self.parser.character(ref)
def unknown_endtag(self, name):
self.parser.end(name)
def close(self):
sgmllib.SGMLParser.close(self)
self.parser.balance()
assert self.parser.node == self.parser.tree
class XMLParser(xml.sax.handler.ContentHandler):
def __init__(self):
self.parser = Parser()
self.locator = None
def line(self):
if self.locator != None:
self.parser.line(self.locator.getSystemId(),
self.locator.getLineNumber(),
self.locator.getColumnNumber())
def setDocumentLocator(self, locator):
self.locator = locator
def startElement(self, name, attrs):
self.parser.start(name, attrs.items())
self.line()
def endElement(self, name):
self.parser.end(name)
self.line()
def characters(self, content):
self.parser.data(content)
self.line()
def skippedEntity(self, name):
self.parser.entity(name)
self.line()
|
