#!/bin/env python

# 2.3 imports
from optparse import OptionParser

# our imports
import lex

class TTGrammar(lex.Grammar):
    GRAMMAR_LIST = [
        {'name': 'comment',
         'expr': r'''<!--(?:.| |\n)+?(?:-->|$)''',
         'action': lex.make_token},

        {'name': 'template',
         'expr': r'''\[%(?:.| |\n)*?%\]''',
         #'expr': r'''\[%%\]''',
         'action': lex.make_token},

        {'name': 'ltb',
         'expr': r'<![^>]*>',
         'action': lex.make_token},

        {'name': 'ltq',
         'expr': r'<\?',
         'action': lex.make_token},

        {'name': 'gtq',
         'expr': r'\?>',
         'action': lex.make_token},

        {'name': 'ltc',
         'expr': r'</',
         'action': lex.make_token},

        {'name': 'gtc',
         'expr': r'/>',
         'action': lex.make_token},

        {'name': 'lt',
         'expr': r'<',
         'action': lex.make_token},

        {'name': 'gt',
         'expr': r'>',
         'action': lex.make_token},

        {'name': 'nodevalue',
         'expr': r'''(?:(?<=>)|(?<=%\]))(?:[^<\[]|\n|\[(?!%.*?%\]))+?(?=(?:<|\[%))''',
         'action': lex.make_token},

        {'name': 'whitespace',
         'expr': r'''(?: |\n)+''',
         'action': lex.silent},

        {'name': 'namespace',
         'expr': r'[a-zA-Z_]+:',
         'action': lex.make_token},

        #{'name': 'xi',
        # 'expr': r'xi:',
        # 'action': lex.make_token},

        {'name': 'opentag',
         'expr': r'(?:(?<=<)|(?<=xi:))[^ >\n/]+',
         'action': lex.make_token},

        {'name': 'attrvalue',
         'expr': r'''(?<==)"(?:\\.|[^"\\])*(?:"|\\?$)|(?<==)'(?:\\.|[^'\\])*(?:'|\\?$)''',
         'action': lex.make_token},

        {'name': 'attrname',
         'expr': r'[^ \n=>]+(?:(?==)|$)',
         'action': lex.make_token},

        {'name': 'closetag',
         'expr': r'[^ =\n<>/]+',
         'action': lex.make_token},

        {'name': 'default',
         'expr': r""".|\n""",
         'action': lex.silent}
    ]

    def _default_rules(self):
        """subclasses can override this to define defaults for a grammar"""
        for rdir in TTGrammar.GRAMMAR_LIST:
            self.add_rule(**rdir)