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[fukui-no-namari/fukui-no-namari.git] / src / Hage1 / HTMLParserEx.py
1 # HTMLPaserEx.py
2 # This is a derivative work of HTMLParser.py from Python.
3 # under the terms of Python Software Foundation License.
4
5 # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006 Python Software Foundation.
6 # All rights reserved.
7 #
8 # Copyright (c) 2000 BeOpen.com.
9 # All rights reserved.
10 #
11 # Copyright (c) 1995-2001 Corporation for National Research Initiatives.
12 # All rights reserved.
13 #
14 # Copyright (c) 1991-1995 Stichting Mathematisch Centrum.
15 # All rights reserved.
16
17
18 # ChangeLog
19 #
20 # feed is always complete.
21 # character and entity references must be strict.
22 # support handling a uri (starting with http://).
23 #
24 # Copyright (C) 2006 by Aiwota Programmer
25 # aiwotaprog@tetteke.tk
26
27 from HTMLParser import starttagopen
28 import HTMLParser
29 import re
30
31 interesting_normal = re.compile("[<&h]")
32
33 charref = re.compile('&#(?:[0-9]+|[xX][0-9a-fA-F]+);')
34 entityref = re.compile('&([a-zA-Z][-.a-zA-Z0-9]*);')
35
36 urireg = re.compile("http://[a-zA-z0-9/.&=%\-?~]*")
37
38
39 class HTMLParserEx(HTMLParser.HTMLParser):
40
41     def reset(self):
42         HTMLParser.HTMLParser.reset(self)
43         self.interesting = interesting_normal
44
45     def clear_cdata_mode(self):
46         HTMLParser.HTMLParser.clear_cdata_mode(self)
47         self.interesting = interesting_normal
48
49     # Internal -- handle data as far as reasonable.  May leave state
50     # and data to be processed by a subsequent call.  If 'end' is
51     # true, force handling all data as if followed by EOF marker.
52     def goahead(self, end):
53         rawdata = self.rawdata
54         i = 0
55         n = len(rawdata)
56         while i < n:
57             match = self.interesting.search(rawdata, i) # < or & or h
58             if match:
59                 j = match.start()
60             else:
61                 j = n
62             if i < j: self.handle_data(rawdata[i:j])
63             i = self.updatepos(i, j)
64             if i == n: break
65             startswith = rawdata.startswith
66             if startswith('<', i):
67                 if starttagopen.match(rawdata, i): # < + letter
68                     k = self.parse_starttag(i)
69                 elif startswith("</", i):
70                     k = self.parse_endtag(i)
71                 elif startswith("<!--", i):
72                     k = self.parse_comment(i)
73                 elif startswith("<?", i):
74                     k = self.parse_pi(i)
75                 elif startswith("<!", i):
76                     k = self.parse_declaration(i)
77
78                 if k < 0: # not terminated, out simply.
79                     self.handle_data("<")
80                     k = i + 1
81
82                 i = self.updatepos(i, k)
83             elif startswith("&#", i):
84
85                 match = charref.match(rawdata, i)
86                 if match:
87                     name = match.group()[2:-1]
88                     self.handle_charref(name)
89                     k = match.end()
90                     i = self.updatepos(i, k)
91                 else:
92                     self.handle_data("&#")
93                     i = self.updatepos(i, i + 2)
94
95             elif startswith('&', i):
96
97                 match = entityref.match(rawdata, i)
98                 if match:
99                     name = match.group(1)
100                     self.handle_entityref(name)
101                     k = match.end()
102                     i = self.updatepos(i, k)
103                 else:
104                     self.handle_data("&")
105                     i = self.updatepos(i, i + 1)
106
107             elif startswith("h", i):
108
109                 match = urireg.match(rawdata, i)
110                 if match:
111                     k = match.end()
112                     attr = [("href", match.group())]
113                     self.handle_starttag("a", attr)
114                     self.handle_data(match.group())
115                     self.handle_endtag("a")
116                     i = self.updatepos(i, k)
117                 else:
118                     self.handle_data("h")
119                     i = self.updatepos(i, i + 1)
120
121             else:
122                 assert 0, "interesting.search() lied"
123         # end while
124         if i < n: # always complete
125             self.handle_data(rawdata[i:n])
126             i = self.updatepos(i, n)
127         self.rawdata = rawdata[i:]