import color, mode
from lex import Grammar, PatternRule, NocasePatternRule, RegionRule, NocaseRegionRule
from point import Point

class StringGrammar(Grammar):
    rules = [
        PatternRule(r'octal', r'\\[0-7]{3}'),
        PatternRule(r'escaped', r'\\.'),
    ]

class KeywordGrammar(Grammar):
    rules = [
        PatternRule(r'octal', r'\\[0-7]{3}'),
        PatternRule(r'escaped', r'\\.'),
        RegionRule('string', "'", StringGrammar, r"'"),
        RegionRule('string', '"', StringGrammar, r'"'),
    ]

class CSSGrammar(Grammar):
    rules = [
        RegionRule(r'comment', '/\*', Grammar, '\*/'),
        RegionRule(r'htmlcomment', '<!--', Grammar, '-->'),
        NocasePatternRule(r'dimension', r'[+-]?(?:[0-9]+|[0-9]*\.[0-9]+)[-a-z_][-a-z0-9_]*'),
        NocasePatternRule(r'percentage', r'[+-]?(?:[0-9]+|[0-9]*\.[0-9]+)%%'),
        NocasePatternRule(r'length', r'[+-]?(?:[0-9]+|[0-9]*\.[0-9]+)(?:em|ex|px|in|cm|mm|pt|pc)'),
        NocasePatternRule(r'hash', r'#[-a-z0-9_]+'),
        NocasePatternRule(r'real', r'[+-]?[0-9]*\.[0-9]+'),
        NocasePatternRule(r'int', r'[+-]?[0-9]+'),
        NocasePatternRule(r'rule', r'@(?:page|media|import)'),
        NocasePatternRule(r'color', r'(?:aqua|black|blue|fuchsia|gray|green|lime|maroon|navy|olive|orange|purple|red|silver|teal|white|yellow|#[0-9]{6}|#[0-9]{3})'),

        NocasePatternRule(r'css_keyword', r'(?:url|rgb|counter)'),
        NocaseRegionRule(r'css_keyword', '(?:(?<=url)|(?<=rgb)|(?<=counter))\(', KeywordGrammar, '\)'),

        NocasePatternRule(r'css_label', r"\.?[-a-zA-Z0-9_]+(?= *{)"),

        NocasePatternRule(r'ident', r"-?[a-z_][-a-z0-9_]*"),
        NocasePatternRule(r'name', r"[-a-z0-9_]+"),
        NocasePatternRule(r'delimiter', r'[:;,{}()\[\]]|~=|\|=|='),
        RegionRule(r'string', "'", StringGrammar, r"'"),
        RegionRule(r'string', '"', StringGrammar, r'"'),
    ]

class CSS(mode.Fundamental):
    modename   = 'CSS'
    extensions = ['.css']
    grammar    = CSSGrammar
    opentokens  = ('delimiter',)
    opentags    = {'(': ')', '[': ']', '{': '}'}
    closetokens = ('delimiter',)
    closetags   = {')': '(', ']': '[', '}': '{'}
    colors     = {
        #'comment':       ('red', 'default'),
        #'comment.start': ('red', 'default'),
        #'comment.null':  ('red', 'default'),
        #'comment.end':   ('red', 'default'),

        'htmlcomment':       ('red', 'default'),
        'htmlcomment.start': ('red', 'default'),
        'htmlcomment.null':  ('red', 'default'),
        'htmlcomment.end':   ('red', 'default'),

        'dimension':  ('magenta', 'default'),
        'percentage': ('magenta', 'default'),
        'length':     ('magenta', 'default'),
        'real':       ('magenta', 'default'),
        'int':        ('magenta', 'default'),
        'color':      ('magenta', 'default'),

        'hash':    ('cyan', 'default'),
        'css_label':   ('cyan', 'default'),
        'rule':    ('cyan', 'default'),
        'css_keyword': ('cyan', 'default'),

        'ident': ('default', 'default'),
        'name':  ('default', 'default'),

        'delimiter': ('default', 'default'),

        'css_keyword':         ('cyan', 'default'),
        'css_keyword.start':   ('default', 'default'),
        'css_keyword.null':    ('cyan', 'default'),
        'css_keyword.octal':   ('magenta', 'default'),
        'css_keyword.escaped': ('magenta', 'default'),
        'css_keyword.end':     ('default', 'default'),

        #'string.start':   ('green', 'default'),
        #'string.null':    ('green', 'default'),
        #'string.octal':   ('magenta', 'default'),
        #'string.escaped': ('magenta', 'default'),
        #'string.end':     ('green', 'default'),
    }
    def __init__(self, w):
        mode.Fundamental.__init__(self, w)
        self.add_bindings('close-paren', (')',))
        self.add_bindings('close-brace', ('}',))
        self.add_bindings('close-bracket', (']',))

install = CSS.install