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

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

class Template(mode2.Fundamental):
    grammar = TemplateGrammar
    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'),
            'template.start':       color.build('magenta', 'default'),
            'template.null':        color.build('magenta', 'default'),
            'template.end':         color.build('magenta', '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 "Template"