pmacs3/mode/scala.py

#import commands
#from tab import StackTabber
#from method import Method 
from mode import Fundamental
from lex import Grammar, PatternRule, RegionRule, PatternMatchRule
from mode.python import StringGrammar1, StringGrammar2
#from mode.pipe import Pipe
#from method.shell import Interact

chr1 = '[a-zA-Z_]'
chr2 = '[a-zA-Z_0-9]'
word = chr1 + chr2 + '*'

class NestedCommentGrammar(Grammar): pass
NestedCommentGrammar.rules = [
    RegionRule('comment', r'/\*', NestedCommentGrammar, r'\*/'),
    PatternRule('data', r'(?:[^\*]|\*(?!/))+'),
]

class StringGrammar(Grammar):
    rules = [
        PatternRule('escaped', r"\\u[0-9A-Fa-f]{4}|\\[0-7]{1,3}|\\[btnfr\"'\\]"),
        PatternRule('data', r'[^\\"]+'),
    ]

class ScalaGrammar(Grammar):
    rules = [
        PatternRule('scala.comment', '//.*$'),
        RegionRule('scala.comment', r'/\*', NestedCommentGrammar, r'\*/'),

        PatternRule('spaces', r'(?:\t| )+'),
        PatternRule('eol', r'\n'),

        PatternRule('scala.reserved', '(?:yield|with|while|var|val|type|true|try|trait|throw|this|super|sealed|return|protected|private|package|override|object|null|new|match|lazy|import|implicit|if|forSome|for|finally|final|false|extends|else|do|def|class|catch|case|abstract)(?!%s)' % word),

        PatternRule('scala.integer', '-?(?:0|[1-9])[0-9]*[Ll]?'),
        PatternRule('scala.integer', '-?0x[0-9A-Fa-f]+[Ll]?'),
        PatternRule('scala.integer', '-?0[0-7]+[Ll]?'),

        PatternRule('scala.float', r'-?[0-9]+\.[0-9]*'), # FIXME

        PatternRule('scala.bool', '(?:true|false)(?![a-zA-Z0-9_])'),

        PatternRule('scala.char', r"'(?:[^'\\]|\\u[0-9A-Fa-f]{4}|\\[0-7]{1,3}|\\[btnfr\"'\\])'"),
        RegionRule('scala.string', '"', StringGrammar, '"'),
        PatternRule('scala.symbol', "'[a-zA-Z_][a-zA-Z0-9_]*"),
        PatternRule('scalar.null', 'null'),
    ]

class Scala(Fundamental):
    name        = 'Scala'
    extensions  = ['.scala']
    grammar     = ScalaGrammar
    commentc    = '--'
    opentokens  = ('delimiter',)
    opentags    = {'(': ')', '[': ']', '{': '}'}
    closetokens = ('delimiter',)
    closetags   = {')': '(', ']': '[', '}': '{'}
    colors      = {}
    _bindings   = {
        'close-paren':      (')',),
        'close-brace':      ('}',),
        'close-bracket':    (']',),
    }

def install(*args):
    Scala.install(*args)