pmacs3/mode/latex.py

import color, mode
from lex import Grammar, PatternRule, RegionRule
from method import Method, CommentRegion, UncommentRegion

class LatexGrammar(Grammar):
    rules = [
        PatternRule(r'comment', r'\%.*$'),
        PatternRule(r'latex_control', r'\\[a-zA-Z]+'),
        RegionRule(r'latex_argument', r'{', None, r'}'),
        RegionRule(r'latex_string', r"`", None, r"'"),
        RegionRule(r'latex_string', r"``", None, r"''"),
        PatternRule(r'latex_escaped', r'\\.'),
        PatternRule(r'latex_special', r'[{}$^_%~#&]'),
    ]

class Latex(mode.Fundamental):
    modename   = 'Latex'
    extensions = ['.latex', '.tex']
    grammar    = LatexGrammar
    colors     = {
        'latex_control':       ('blue', 'default', 'bold'),
        'latex_argument.null': ('cyan', 'default', 'bold'),
        'latex_string.start':  ('green', 'default', 'bold'),
        'latex_string.null':   ('green', 'default', 'bold'),
        'latex_string.end':    ('green', 'default', 'bold'),
        'latex_escaped':       ('magenta', 'default', 'bold'),
    }
    def __init__(self, w):
        mode.Fundamental.__init__(self, w)
        self.add_bindings('wrap-paragraph', ('M-q',))
        self.add_action_and_bindings(LatexCommentRegion(), ('C-c #', "C-c \%"))
        self.add_action_and_bindings(LatexUncommentRegion(), ('C-u C-c #', "C-u C-c \%"))
        self.add_action_and_bindings(LatexInsertSquotes(), ("M-'",))
        self.add_action_and_bindings(LatexInsertDquotes(), ('M-"',))
        self.add_action_and_bindings(LatexInsertBraces(), ('M-{',))

class LatexCommentRegion(CommentRegion):
    commentc = '%'
class LatexUncommentRegion(UncommentRegion):
    commentc = '%'

class LatexInsertSquotes(Method):
    '''Insert a pair of LaTeX-style single-quotes into the buffer'''
    def _execute(self, w, **vargs):
        w.insert_string_at_cursor("`'")
        w.backward()
class LatexInsertDquotes(Method):
    '''Insert a pair of LaTeX-style double-quotes into the buffer'''
    def _execute(self, w, **vargs):
        w.insert_string_at_cursor("``''")
        w.backward()
        w.backward()
class LatexInsertBraces(Method):
    '''Insert a pair of curly braces into the buffer'''
    def _execute(self, w, **vargs):
        w.insert_string_at_cursor("{}")
        w.backward()

install = Latex.install