import color, mode2
from lex2 import Grammar, ConstantRule, PatternRule, RegionRule, DualRegionRule

class TagGrammar(Grammar):
    rules = [
        RegionRule(
            name=r'string',
            start=r'(?P<tag>["\'])',
            grammar=Grammar(),
            end=r'%(tag)s',
        ),
        PatternRule(
            name=r'namespace',
            pattern=r'[a-zA-Z_]+:',
        ),
        PatternRule(
            name=r'attrname',
            pattern=r'[^ =>\n]+(?==)',
        ),
        PatternRule(
            name=r'name',
            pattern=r'[^ =>\n]+',
        ),
    ]

class XMLGrammar(Grammar):
    rules = [
        RegionRule(
            name=r'comment',
            start=r'<!--',
            grammar=Grammar(),
            end=r'-->',
        ),
        RegionRule(
            name=r'opentag',
            start=r'<',
            grammar=TagGrammar(),
            end=r'/?>',
        ),
        PatternRule(
            name=r'closetag',
            pattern=r'< */ *[ =>\n]+ *>',
        ),
    ]

class XML(mode2.Fundamental):
    grammar = XMLGrammar
    def __init__(self, w):
        mode2.Fundamental.__init__(self, w)
        self.add_bindings('close-paren', (')',))
        self.add_bindings('close-brace', ('}',))
        self.add_bindings('close-bracket', (']',))
        self.colors = {
            'comment':              color.build('red', 'default'),
            'opentag.start':        color.build('default', 'default'),
            'opentag.namespace':    color.build('magenta', 'default'),
            'opentag.name':         color.build('blue', 'default'),
            'opentag.attrname':     color.build('cyan', 'default'),
            'opentag.string.start': color.build('green', 'default'),
            'opentag.string.null':  color.build('green', 'default'),
            'opentag.string.end':   color.build('green', 'default'),
            'opentag.end':          color.build('default', 'default'),
        }
    def name(self):
        return "XML"