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gram2html.py
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gram2html.py
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"""
gram2html -- convert Yapps grammar to HTML
Share and Enjoy. Open Source license:
Copyright (c) 2001 W3C (MIT, INRIA, Keio)
http://www.w3.org/Consortium/Legal/copyright-software-19980720
$Id: gram2html.py,v 1.4 2007-06-26 02:36:15 syosi Exp $
see log at end
REFERENCES
Yapps: Yet Another Python Parser System
http://theory.stanford.edu/~amitp/Yapps/
Sat, 18 Aug 2001 16:54:32 GMT
Last modified 13:21 Sun 26 Nov 2000 , Amit Patel
$Id: gram2html.py,v 1.4 2007-06-26 02:36:15 syosi Exp $
"""
from string import find
import yapps2, yappsrt
def toHTML(self, xwr):
self.calculate()
xwr.startElement('dl')
for r in self.goals:
xwr.startElement('dt')
xwr.startElement('a', [('name', r), ('id', r)])
xwr.data(r)
xwr.endElement()
argsToHTML(self.params[r], xwr)
xwr.endElement()
exp = self.rules[r]
xwr.startElement('dd')
expToHTML(exp, xwr)
xwr.endElement()
xwr.endElement()
from yapps2 import Eval, Terminal, NonTerminal, \
Sequence, Choice, Option, Plus, Star
def expToHTML(sym, xwr, toplevel=1):
if isinstance(sym, Eval):
pass
elif isinstance(sym, Terminal):
xwr.startElement('tt')
xwr.data(sym.token)
xwr.endElement()
xwr.data(" ")
elif isinstance(sym, NonTerminal):
xwr.startElement('a', [('href', "#%s" % (sym.name,))])
xwr.data(sym.name)
xwr.endElement()
argsToHTML(sym.args, xwr)
xwr.data(" ")
elif isinstance(sym, Sequence):
if not toplevel: xwr.data('( ')
for s in sym.children:
expToHTML(s, xwr, 0)
if not toplevel: xwr.data(' ) ')
elif isinstance(sym, Choice):
if not toplevel: xwr.data('( ')
for s in sym.children[:-1]:
expToHTML(s, xwr, 0)
xwr.emptyElement('br', [('class', "")])
xwr.data(' | ')
expToHTML(sym.children[-1], xwr, 0)
if not toplevel: xwr.data(' ) ')
elif isinstance(sym, Option):
xwr.data('[ ')
expToHTML(sym.child, xwr )
xwr.data(' ] ')
elif isinstance(sym, Star):
expToHTML(sym.child, xwr, 0)
xwr.data('* ')
elif isinstance(sym, Plus):
expToHTML(sym.child, xwr, 0)
xwr.data('+ ')
else:
xwr.startElement('b')
xwr.data('@@%s@@' % sym.name)
xwr.endElement()
xwr.data(" ")
def argsToHTML(args, xwr):
xwr.startElement('sub')
xwr.data(args)
xwr.endElement()
def generate(title, inputfilename, outputfilename=''):
"""Generate an HTML version of the grammar,
given a title, an input filename (X.g)
and an output filename (defaulting to X.py)."""
import sys, codecs
from toXML import XMLWriter
dummy, dummy, dummy, encWriter = codecs.lookup('utf-8')
if not outputfilename:
if inputfilename[-2:]=='.g': outputfilename = inputfilename[:-2]+'.html'
else: raise "Invalid Filename", outputfilename
DIVIDER = '\n%%\n' # This pattern separates the pre/post parsers
preparser, postparser = None, None # Code before and after the parser desc
# Read the entire file
s = open(inputfilename,'r').read()
# See if there's a separation between the pre-parser and parser
f = find(s, DIVIDER)
if f >= 0: preparser, s = s[:f]+'\n\n', s[f+len(DIVIDER):]
# See if there's a separation between the parser and post-parser
f = find(s, DIVIDER)
if f >= 0: s, postparser = s[:f], '\n\n'+s[f+len(DIVIDER):]
# Create the parser and scanner
p = yapps2.ParserDescription(yapps2.ParserDescriptionScanner(s))
if not p: return
# Now parse the file
t = yappsrt.wrap_error_reporter(p, 'Parser')
if not t: return # Error
# Generate the output
xwr = XMLWriter(encWriter(sys.stdout))
xwr.startElement('html') #@@ xmlns
xwr.startElement('head')
xwr.startElement('title')
xwr.data(title)
xwr.endElement()
xwr.endElement()
xwr.startElement('body')
xwr.startElement('h1')
xwr.data(title)
xwr.endElement() # h1
xwr.startElement('address')
xwr.data('source: ')
xwr.startElement('a', [('href', inputfilename)])
xwr.data(inputfilename)
xwr.endElement() #a
xwr.data(', a ')
xwr.startElement('a', [('href', 'http://theory.stanford.edu/~amitp/Yapps/')])
xwr.data('YAPPS')
xwr.endElement() #a
xwr.data(' grammar')
xwr.endElement() #address
toHTML(t, xwr)
xwr.endElement() # body
xwr.endElement() # html
def main(argv):
generate(argv[2], argv[1])
if __name__ == '__main__':
import sys
main(sys.argv)
# $Log: gram2html.py,v $
# Revision 1.4 2007-06-26 02:36:15 syosi
# fix tabs
#
# Revision 1.3 2002/08/15 23:24:17 connolly
# updated grammar, cited YAPPS
#
# Revision 1.2 2002/07/17 19:33:48 connolly
# published HTML version of relaxNG grammar
#
# Revision 1.1 2001/09/01 05:31:17 connolly
# - gram2html.py generates HTML version of grammar from rdfn3.g
# - make use of [] in rdfn3.g
# - more inline terminals
# - jargon change: scopes rather than contexts
# - term rule split into name, expr; got rid of shorthand
#