cpython/Doc/tools/sgmlconv/esis2sgml.py

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#! /usr/bin/env python
"""Convert ESIS events to SGML or XML markup.
This is limited, but seems sufficient for the ESIS generated by the
latex2esis.py script when run over the Python documentation.
"""
__version__ = '$Revision$'
import errno
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import esistools
import os
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import re
import string
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from xml.utils import escape
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EMPTIES_FILENAME = "../sgml/empties.dat"
LIST_EMPTIES = 0
def format_attrs(attrs, xml=0):
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attrs = attrs.items()
attrs.sort()
s = ''
for name, value in attrs:
if xml:
s = '%s %s="%s"' % (s, name, escape(value))
else:
# this is a little bogus, but should do for now
if name == value and isnmtoken(value):
s = "%s %s" % (s, value)
elif istoken(value):
s = "%s %s=%s" % (s, name, value)
else:
s = '%s %s="%s"' % (s, name, escape(value))
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return s
_nmtoken_rx = re.compile("[a-z][-._a-z0-9]*$", re.IGNORECASE)
def isnmtoken(s):
return _nmtoken_rx.match(s) is not None
_token_rx = re.compile("[a-z0-9][-._a-z0-9]*$", re.IGNORECASE)
def istoken(s):
return _token_rx.match(s) is not None
def do_convert(ifp, ofp, xml=0):
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attrs = {}
lastopened = None
knownempties = []
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knownempty = 0
lastempty = 0
while 1:
line = ifp.readline()
if not line:
break
type = line[0]
data = line[1:]
if data and data[-1] == "\n":
data = data[:-1]
if type == "-":
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data = esistools.decode(data)
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ofp.write(escape(data))
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if "\n" in data:
lastopened = None
knownempty = 0
lastempty = 0
elif type == "(":
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if data == "COMMENT":
ofp.write("<!--")
continue
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if knownempty and xml:
ofp.write("<%s%s/>" % (data, format_attrs(attrs, xml)))
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else:
ofp.write("<%s%s>" % (data, format_attrs(attrs, xml)))
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if knownempty and data not in knownempties:
# accumulate knowledge!
knownempties.append(data)
attrs = {}
lastopened = data
lastempty = knownempty
knownempty = 0
elif type == ")":
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if data == "COMMENT":
ofp.write("-->")
continue
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if xml:
if not lastempty:
ofp.write("</%s>" % data)
elif data not in knownempties:
if lastopened == data:
ofp.write("</>")
else:
ofp.write("</%s>" % data)
lastopened = None
lastempty = 0
elif type == "A":
name, type, value = string.split(data, " ", 2)
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attrs[name] = esistools.decode(value)
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elif type == "e":
knownempty = 1
if LIST_EMPTIES:
knownempties.append("")
if os.path.isfile(EMPTIES_FILENAME):
mode = "a"
else:
mode = "w"
fp = open(EMPTIES_FILENAME, mode)
fp.write(string.join(knownempties, "\n"))
fp.close()
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def sgml_convert(ifp, ofp):
return do_convert(ifp, ofp, xml=0)
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def xml_convert(ifp, ofp):
return do_convert(ifp, ofp, xml=1)
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def main():
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import getopt
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import sys
#
convert = sgml_convert
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xml = 0
xmldecl = 0
opts, args = getopt.getopt(sys.argv[1:], "dx", ["declare", "xml"])
for opt, arg in opts:
if opt in ("-d", "--declare"):
xmldecl = 1
elif opt in ("-x", "--xml"):
xml = 1
convert = xml_convert
if len(args) == 0:
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ifp = sys.stdin
ofp = sys.stdout
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elif len(args) == 1:
ifp = open(args[0])
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ofp = sys.stdout
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elif len(args) == 2:
ifp = open(args[0])
ofp = open(args[1], "w")
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else:
usage()
sys.exit(2)
# knownempties is ignored in the XML version
try:
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if xml and xmldecl:
opf.write('<?xml version="1.0" encoding="iso8859-1"?>\n')
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convert(ifp, ofp)
except IOError, (err, msg):
if err != errno.EPIPE:
raise
if __name__ == "__main__":
main()