#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (C) 2009 Søren Roug, European Environment Agency
#
# This is free software.  You may redistribute it under the terms
# of the Apache license and the GNU General Public License Version
# 2 or at your option any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# Contributor(s):
#
from xml.sax import make_parser,handler
from xml.sax.xmlreader import InputSource
import xml.sax.saxutils
import sys
from odf.namespaces import *

RELAXNS=u"http://relaxng.org/ns/structure/1.0"

#elements = {}

class Node:
    ns = None
    name = None

class Element(Node):
    " Element "
    def __init__(self):
        self.attrs = {}

class Attribute(Node):
    " Attribute "

#
#
class S22RelaxParser(handler.ContentHandler):
    """ Extract headings from content.xml of an ODT file """

    optional = 0
    currattr = None
    currelem = None
    currnode = None
    currdef = None
    definitions = {}
    ignore = 0

    def __init__(self):
        self.data = []
        self.level = 0

    def text(self):
        return ''.join(self.data).strip()

    def characters(self, data):
        self.data.append(data)

    def startElementNS(self, tag, qname, attrs):
        if self.ignore == 1:
            return
        #print "START ",tag
        if tag == (RELAXNS, 'define'):
            self.currdef = {}
            self.currdef['refs'] = []
            self.currdef['elements'] = []
            self.currdef['name'] = attrs.get( (None, 'name'))
        elif tag in ((RELAXNS, 'attribute'), (RELAXNS, 'start')):
            self.ignore = 1
        elif tag == (RELAXNS, 'ref'):
            ref = attrs.get( (None, 'name'))
            if ref not in self.currdef['refs']:
                self.currdef['refs'].append(ref)
        elif tag == (RELAXNS, 'name'):
            self.currdef['ns'] = attrs.get( (None, 'ns'))
            self.data = []

    def endElementNS(self, tag, qname):
        if tag in ((RELAXNS, 'attribute'), (RELAXNS, 'start')):
            self.ignore = 0
            return
        if self.ignore == 1:
            return
        #print "END   ",tag
        if tag == (RELAXNS, 'define'):
            if len(self.currdef['elements']):
                self.definitions[self.currdef['name']] = self.currdef
        elif tag == (RELAXNS, 'name'):
            self.currdef['elements'].append(self.text())
        elif tag == (RELAXNS, 'anyName'):
            self.currdef['elements'].append("__ANYNAME__")
        self.data = []

if __name__ == "__main__":
    elements = {}
    parser = make_parser()
    parser.setFeature(handler.feature_namespaces, 1)
    p = S22RelaxParser()
    parser.setContentHandler(p)
    parser.setErrorHandler(handler.ErrorHandler())

    for relaxfile in ["simple-manifest-7-22.rng","simple-schema-7-22.rng"]:
        content = file(relaxfile)
        inpsrc = InputSource()
        inpsrc.setByteStream(content)
        parser.parse(inpsrc)

    definitions = p.definitions
    keys= definitions.keys()
    keys.sort()
    print '''# -*- coding: utf-8 -*-
# Copyright (C) 2006-2008 Søren Roug, European Environment Agency
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# Contributor(s):
#

__doc__=""" In principle the OpenDocument schema converted to python structures.
Currently it contains the legal child elements of a given element.
To be used for validation check in the API
"""

from odf.namespaces import *'''

    print "allowed_children = {"
    for key in keys:
        definition = definitions[key]
        for elmname in sorted(definition['elements']):
            if elmname == u'__ANYNAME__':
                continue
            ns = definition.get('ns','UNKNOWN')
            if ns == DBNS: continue
            refs = definition['refs']
            print "# allowed_children"
            if len(refs) == 1 and u'__ANYNAME__' in definitions[refs[0]]['elements']:
                print "\t(%sNS,u'%s') : " % (nsdict.get(ns,'unknown').upper(), elmname)
                print "\t\tNone,"
            else:
                print "\t(%sNS,u'%s') : (" % (nsdict.get(ns,'unknown').upper(), elmname)
                for r in sorted(refs):
                    ns = definitions[r].get('ns','UNKNOWN')
                    for elmref in definitions[r]['elements']:
                        print "\t\t(%sNS,u'%s'), " % (nsdict.get(ns,'unknown').upper(), elmref)
                print "\t),"
    print "}"