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#!/usr/bin/env python
import sys
from xml import sax
class Block(object):
pass
class BasicTextBlock(Block):
def __init__(self, text = ""):
self.text = text
def __str__(self):
return self.text
class Para(BasicTextBlock):
def __str__(self):
return "\n.PP\n" + self.text.lstrip()
class Lpara(BasicTextBlock):
def __str__(self):
return "\n.IP\n" + self.text.lstrip()
class ProgramListing(BasicTextBlock):
def __str__(self):
return "\n.nf\n%s\n.fi\n" % self.text.lstrip()
class ListItem(Block):
def __init__(self):
self.paras = []
def __str__(self):
ret = ""
for p in self.paras:
ret += str(p)
return ret
class VariableList(Block):
def __init__(self):
self.entries = []
def __str__(self):
ret = ""
for p in self.entries:
ret += str(p)
return ret
class Variable(Block):
def __init__(self):
self.term = None
self.listitem = None
def __str__(self):
return "\n.TP \n.B %s\n%s\n" % (self.term, str(self.listitem))
class RefSection(Block):
def __init__(self, id):
self.id = id
self.title = None
self.elements = []
def first(self, vtype):
for o in self.elements:
if isinstance(o, vtype):
return o
return None
def last(self, vtype):
for o in reversed(self.elements):
if isinstance(o, vtype):
return o
return None
def __str__(self):
ret = ".SH %s \n" % self.title
for p in self.elements:
ret += str(p)
return ret
class DocBookToNroffHandler(sax.ContentHandler):
def __init__(self, out=sys.stdout):
###########################################################################################
self.out = out
self.stack = []
###########################################################################################
self.refmeta = {}
self.refentryinfo = {}
self.refnamediv = {}
self.synopsis = {}
self.elementcount = 0
self.formatting = []
self.justformatted = False
def is_formatting(self, what):
return what in [ "command", "option", "parameter", "replaceable", "filename", "emphasis" ]
def translate_formatting(self, what):
if what in ["command", "option", "parameter", "filename"]:
return "B"
elif what in ["emphasis", "replaceable"]:
return "I"
return ""
def startElement(self, name, attrs):
###########################################################################################
#print >> self.out, "+" + name
name = name.lower()
self.stack.append(name)
self.elementcount += 1
#print >> self.out, self.stack
###########################################################################################
if "refsection" == name:
self.refsection = RefSection(attrs["id"])
if "para" == name:
if "listitem" in self.stack:
self.refsection.last(VariableList).entries[-1].listitem.paras.append(Lpara())
elif "refsection" in self.stack:
self.refsection.elements.append(Para())
if "variablelist" == name:
self.refsection.elements.append(VariableList())
if "varlistentry" == name:
self.refsection.last(VariableList).entries.append(Variable())
if "listitem" == name:
self.refsection.last(VariableList).entries[-1].listitem = ListItem()
if "programlisting" == name:
self.refsection.elements.append(ProgramListing())
if self.is_formatting(name):
self.formatting.append(self.translate_formatting(name))
def characters(self, content):
###########################################################################################
name = self.stack[-1]
#print >> self.out, content
###########################################################################################
#TODO this should always use += content instead of = content, in case content is incomplete
# if "refentryinfo" in self.stack:
# if "refentrytitle" == name:
# self.refentryinfo["refentrytitle"] = content
# if "manvolnum" == name:
# self.refentryinfo["manvolnum"] = content
# if "productname" == name:
# self.refentryinfo["productname"] = content
# if "date" == name:
# self.refentryinfo["date"] = content
if "refmeta" in self.stack:
if "refentrytitle" == name:
self.refmeta["refentrytitle"] = content
if "manvolnum" == name:
self.refmeta["manvolnum"] = content
elif "refentryinfo" in self.stack:
if "productname" == name:
self.refentryinfo["productname"] = content
if "productnumber" == name:
self.refentryinfo["productnumber"] = content
if "date" == name:
self.refentryinfo["date"] = content
elif "refnamediv" in self.stack:
if "refname" == name:
self.refnamediv["refname"] = content
if "refpurpose" == name:
self.refnamediv["refpurpose"] = content
elif "cmdsynopsis" in self.stack:
if "command" == name:
self.synopsis["command"] = content
#don't check more explicitly, take all text content under the arg
elif "arg" in self.stack:
if not self.synopsis.has_key("args"):
self.synopsis["args"] = []
self.synopsis["args"].append(content)
elif "refsection" in self.stack:
if "title" in self.stack:
self.refsection.title = content
elif "varlistentry" in self.stack:
if "term" == name:
self.refsection.last(VariableList).entries[-1].term = content
elif "listitem" in self.stack:
if "para" in self.stack:
self._add_formatted_text(self.refsection.last(VariableList).entries[-1].listitem.paras[-1], content)
elif "programlisting" in self.stack:
self.refsection.last(ProgramListing).text += content
elif "para" in self.stack:
self._add_formatted_text(self.refsection.last(Para), content)
def _add_formatted_text(self, mypara, content):
if self.formatting:
mypara.text += "\n.%s %s\n" % ("".join(self.formatting), content)
self.justformatted = True
else:
if self.justformatted:
mypara.text += content.lstrip()
else:
mypara.text += content
self.justformatted = False
def endElement(self, name):
###########################################################################################
#print >> self.out, "-" + name
name = name.lower()
self.stack.pop()
#print >> self.out, self.stack
###########################################################################################
if "refmeta" == name:
print >> self.out, ".TH %(refentrytitle)s %(manvolnum)s" % self.refmeta
if "refentryinfo" == name:
print >> self.out, "\"%(date)s\" \"%(productnumber)s\" \"%(productname)s\"" % self.refentryinfo
if "refnamediv" == name:
print >> self.out, ".SH NAME \n %(refname)s \- %(refpurpose)s" % self.refnamediv
if "cmdsynopsis" == name:
self.synopsis["argcombo"] = " ".join(self.synopsis["args"])
print >> self.out, ".SH Synopsis \n.B %(command)s \n%(argcombo)s" % self.synopsis
if "refsection" == name:
print >> self.out, str(self.refsection)
if self.is_formatting(name):
self.formatting.pop()
parser = sax.make_parser()
parser.setContentHandler(DocBookToNroffHandler())
parser.parse(open(sys.argv[1], "r"))
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