import color, mode
from lex import Grammar, PatternRule, RegionRule
from mode.xml import TagGrammar
from mode.javascript import JavascriptGrammar
from mode.css import CSSGrammar

class HTMLGrammar(Grammar):
    rules = [
        # TODO: how does cdata work again?
        RegionRule(r'comment', r'<!--', Grammar, r'-->'),
        # BUG: not all scripts are javascript and not all styles are CSS
        # but, dynamically choosing a grammar based on the 'type' attribute
        # (which may be on a different line) is impractical.
        RegionRule(r'script', r'<(?=script[^a-zA-Z0-9_])', TagGrammar, r'>', JavascriptGrammar, r'</(?=script>)', TagGrammar, r'>'),
        RegionRule(r'style', r'<(?=style[^a-zA-Z0-9_])', TagGrammar, r'>', CSSGrammar, r'</(?=style>)', TagGrammar, r'>'),
        RegionRule(r'tag', r'</?', TagGrammar, r'/?>'),
    ]

class HTML(mode.Fundamental):
    modename   = 'HTML'
    extensions = ['.html', '.htm', '.shtml', '.shtm', '.xhtml']
    grammar    = HTMLGrammar
    colors     = {}

    def __init__(self, w):
        mode.Fundamental.__init__(self, w)
        self.add_bindings('close-paren', (')',))
        self.add_bindings('close-brace', ('}',))
        self.add_bindings('close-bracket', (']',))

_colorbase = {
    'start':        ('default', 'default'),
    'namespace':    ('magenta', 'default'),
    'name':         ('blue', 'default'),
    'attrname':     ('cyan', 'default'),
    'string.start': ('green', 'default'),
    'string.null':  ('green', 'default'),
    'string.end':   ('green', 'default'),
    'end':          ('default', 'default'),
}
for _name in _colorbase:
    HTML.colors['script.%s' % _name] = _colorbase[_name]
    HTML.colors['style.%s' % _name]  = _colorbase[_name]
    HTML.colors['tag.%s' % _name]    = _colorbase[_name]

install = HTML.install