MediaWiki
REL1_22
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00001 #!/usr/bin/python 00002 # 00003 # Copyright 2007 Google Inc. All Rights Reserved. 00004 00005 """CSS Lexical Grammar rules. 00006 00007 CSS lexical grammar from http://www.w3.org/TR/CSS21/grammar.html 00008 """ 00009 00010 __author__ = ['[email protected] (Lindsey Simon)', 00011 '[email protected] (Mike Samuel)'] 00012 00013 # public symbols 00014 __all__ = [ "NEWLINE", "HEX", "NON_ASCII", "UNICODE", "ESCAPE", "NMSTART", "NMCHAR", "STRING1", "STRING2", "IDENT", "NAME", "HASH", "NUM", "STRING", "URL", "SPACE", "WHITESPACE", "COMMENT", "QUANTITY", "PUNC" ] 00015 00016 # The comments below are mostly copied verbatim from the grammar. 00017 00018 # "@import" {return IMPORT_SYM;} 00019 # "@page" {return PAGE_SYM;} 00020 # "@media" {return MEDIA_SYM;} 00021 # "@charset" {return CHARSET_SYM;} 00022 KEYWORD = r'(?:\@(?:import|page|media|charset))' 00023 00024 # nl \n|\r\n|\r|\f ; a newline 00025 NEWLINE = r'\n|\r\n|\r|\f' 00026 00027 # h [0-9a-f] ; a hexadecimal digit 00028 HEX = r'[0-9a-f]' 00029 00030 # nonascii [\200-\377] 00031 NON_ASCII = r'[\200-\377]' 00032 00033 # unicode \\{h}{1,6}(\r\n|[ \t\r\n\f])? 00034 UNICODE = r'(?:(?:\\' + HEX + r'{1,6})(?:\r\n|[ \t\r\n\f])?)' 00035 00036 # escape {unicode}|\\[^\r\n\f0-9a-f] 00037 ESCAPE = r'(?:' + UNICODE + r'|\\[^\r\n\f0-9a-f])' 00038 00039 # nmstart [_a-z]|{nonascii}|{escape} 00040 NMSTART = r'(?:[_a-z]|' + NON_ASCII + r'|' + ESCAPE + r')' 00041 00042 # nmchar [_a-z0-9-]|{nonascii}|{escape} 00043 NMCHAR = r'(?:[_a-z0-9-]|' + NON_ASCII + r'|' + ESCAPE + r')' 00044 00045 # ident -?{nmstart}{nmchar}* 00046 IDENT = r'-?' + NMSTART + NMCHAR + '*' 00047 00048 # name {nmchar}+ 00049 NAME = NMCHAR + r'+' 00050 00051 # hash 00052 HASH = r'#' + NAME 00053 00054 # string1 \"([^\n\r\f\\"]|\\{nl}|{escape})*\" ; "string" 00055 STRING1 = r'"(?:[^\"\\]|\\.)*"' 00056 00057 # string2 \'([^\n\r\f\\']|\\{nl}|{escape})*\' ; 'string' 00058 STRING2 = r"'(?:[^\'\\]|\\.)*'" 00059 00060 # string {string1}|{string2} 00061 STRING = '(?:' + STRING1 + r'|' + STRING2 + ')' 00062 00063 # num [0-9]+|[0-9]*"."[0-9]+ 00064 NUM = r'(?:[0-9]*\.[0-9]+|[0-9]+)' 00065 00066 # s [ \t\r\n\f] 00067 SPACE = r'[ \t\r\n\f]' 00068 00069 # w {s}* 00070 WHITESPACE = '(?:' + SPACE + r'*)' 00071 00072 # url special chars 00073 URL_SPECIAL_CHARS = r'[!#$%&*-~]' 00074 00075 # url chars ({url_special_chars}|{nonascii}|{escape})* 00076 URL_CHARS = r'(?:%s|%s|%s)*' % (URL_SPECIAL_CHARS, NON_ASCII, ESCAPE) 00077 00078 # url 00079 URL = r'url\(%s(%s|%s)%s\)' % (WHITESPACE, STRING, URL_CHARS, WHITESPACE) 00080 00081 # comments 00082 # see http://www.w3.org/TR/CSS21/grammar.html 00083 COMMENT = r'/\*[^*]*\*+([^/*][^*]*\*+)*/' 00084 00085 # {E}{M} {return EMS;} 00086 # {E}{X} {return EXS;} 00087 # {P}{X} {return LENGTH;} 00088 # {C}{M} {return LENGTH;} 00089 # {M}{M} {return LENGTH;} 00090 # {I}{N} {return LENGTH;} 00091 # {P}{T} {return LENGTH;} 00092 # {P}{C} {return LENGTH;} 00093 # {D}{E}{G} {return ANGLE;} 00094 # {R}{A}{D} {return ANGLE;} 00095 # {G}{R}{A}{D} {return ANGLE;} 00096 # {M}{S} {return TIME;} 00097 # {S} {return TIME;} 00098 # {H}{Z} {return FREQ;} 00099 # {K}{H}{Z} {return FREQ;} 00100 # % {return PERCENTAGE;} 00101 UNIT = r'(?:em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)' 00102 00103 # {num}{UNIT|IDENT} {return NUMBER;} 00104 QUANTITY = '%s(?:%s%s|%s)?' % (NUM, WHITESPACE, UNIT, IDENT) 00105 00106 # "<!--" {return CDO;} 00107 # "-->" {return CDC;} 00108 # "~=" {return INCLUDES;} 00109 # "|=" {return DASHMATCH;} 00110 # {w}"{" {return LBRACE;} 00111 # {w}"+" {return PLUS;} 00112 # {w}">" {return GREATER;} 00113 # {w}"," {return COMMA;} 00114 PUNC = r'<!--|-->|~=|\|=|[\{\+>,:;]'