Minify on backend
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Ruud
Executable
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"""productions for CSS 2.1
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CSS2_1_MACROS and CSS2_1_PRODUCTIONS are from both
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http://www.w3.org/TR/CSS21/grammar.html and
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http://www.w3.org/TR/css3-syntax/#grammar0
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"""
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__all__ = ['CSSProductions', 'MACROS', 'PRODUCTIONS']
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__docformat__ = 'restructuredtext'
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__version__ = '$Id$'
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# option case-insensitive
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MACROS = {
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'h': r'[0-9a-f]',
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#'nonascii': r'[\200-\377]',
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'nonascii': r'[^\0-\177]', # CSS3
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'unicode': r'\\{h}{1,6}(\r\n|[ \t\r\n\f])?',
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'escape': r'{unicode}|\\[^\r\n\f0-9a-f]',
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'nmstart': r'[_a-zA-Z]|{nonascii}|{escape}',
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'nmchar': r'[_a-zA-Z0-9-]|{nonascii}|{escape}',
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'string1': r'\"([^\n\r\f\\"]|\\{nl}|{escape})*\"',
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'string2': r"\'([^\n\r\f\\']|\\{nl}|{escape})*\'",
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'invalid1': r'\"([^\n\r\f\\"]|\\{nl}|{escape})*',
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'invalid2': r"\'([^\n\r\f\\']|\\{nl}|{escape})*",
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'comment': r'\/\*[^*]*\*+([^/*][^*]*\*+)*\/',
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# CSS list 080725 19:43
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# \/\*([^*\\]|{escape})*\*+(([^/*\\]|{escape})[^*]*\*+)*\/
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'ident': r'[-]?{nmstart}{nmchar}*',
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'name': r'{nmchar}+',
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# CHANGED TO SPEC: added "-?"
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'num': r'-?[0-9]*\.[0-9]+|[0-9]+',
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'string': r'{string1}|{string2}',
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'invalid': r'{invalid1}|{invalid2}',
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'url': r'([!#$%&*-~]|{nonascii}|{escape})*',
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's': r'[ \t\r\n\f]+',
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'w': r'{s}?',
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'nl': r'\n|\r\n|\r|\f',
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'range': r'\?{1,6}|{h}(\?{0,5}|{h}(\?{0,4}|{h}(\?{0,3}|{h}(\?{0,2}|{h}(\??|{h})))))',
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'A': r'a|\\0{0,4}(41|61)(\r\n|[ \t\r\n\f])?',
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'C': r'c|\\0{0,4}(43|63)(\r\n|[ \t\r\n\f])?',
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'D': r'd|\\0{0,4}(44|64)(\r\n|[ \t\r\n\f])?',
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'E': r'e|\\0{0,4}(45|65)(\r\n|[ \t\r\n\f])?',
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'F': r'f|\\0{0,4}(46|66)(\r\n|[ \t\r\n\f])?',
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'G': r'g|\\0{0,4}(47|67)(\r\n|[ \t\r\n\f])?|\\g',
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'H': r'h|\\0{0,4}(48|68)(\r\n|[ \t\r\n\f])?|\\h',
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'I': r'i|\\0{0,4}(49|69)(\r\n|[ \t\r\n\f])?|\\i',
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'K': r'k|\\0{0,4}(4b|6b)(\r\n|[ \t\r\n\f])?|\\k',
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'M': r'm|\\0{0,4}(4d|6d)(\r\n|[ \t\r\n\f])?|\\m',
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'N': r'n|\\0{0,4}(4e|6e)(\r\n|[ \t\r\n\f])?|\\n',
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'O': r'o|\\0{0,4}(51|71)(\r\n|[ \t\r\n\f])?|\\o',
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'P': r'p|\\0{0,4}(50|70)(\r\n|[ \t\r\n\f])?|\\p',
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'R': r'r|\\0{0,4}(52|72)(\r\n|[ \t\r\n\f])?|\\r',
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'S': r's|\\0{0,4}(53|73)(\r\n|[ \t\r\n\f])?|\\s',
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'T': r't|\\0{0,4}(54|74)(\r\n|[ \t\r\n\f])?|\\t',
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'X': r'x|\\0{0,4}(58|78)(\r\n|[ \t\r\n\f])?|\\x',
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'Z': r'z|\\0{0,4}(5a|7a)(\r\n|[ \t\r\n\f])?|\\z',
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}
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PRODUCTIONS = [
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('URI', r'url\({w}{string}{w}\)'), #"url("{w}{string}{w}")" {return URI;}
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('URI', r'url\({w}{url}{w}\)'), #"url("{w}{url}{w}")" {return URI;}
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('FUNCTION', r'{ident}\('), #{ident}"(" {return FUNCTION;}
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('IMPORT_SYM', r'@{I}{M}{P}{O}{R}{T}'), #"@import" {return IMPORT_SYM;}
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('PAGE_SYM', r'@{P}{A}{G}{E}'), #"@page" {return PAGE_SYM;}
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('MEDIA_SYM', r'@{M}{E}{D}{I}{A}'), #"@media" {return MEDIA_SYM;}
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('FONT_FACE_SYM', r'@{F}{O}{N}{T}\-{F}{A}{C}{E}'), #"@font-face" {return FONT_FACE_SYM;}
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# CHANGED TO SPEC: only @charset
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('CHARSET_SYM', r'@charset '), #"@charset " {return CHARSET_SYM;}
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('NAMESPACE_SYM', r'@{N}{A}{M}{E}{S}{P}{A}{C}{E}'), #"@namespace" {return NAMESPACE_SYM;}
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# CHANGED TO SPEC: ATKEYWORD
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('ATKEYWORD', r'\@{ident}'),
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('IDENT', r'{ident}'), #{ident} {return IDENT;}
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('STRING', r'{string}'), #{string} {return STRING;}
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('INVALID', r'{invalid}'), # {return INVALID; /* unclosed string */}
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('HASH', r'\#{name}'), #"#"{name} {return HASH;}
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('PERCENTAGE', r'{num}%'), #{num}% {return PERCENTAGE;}
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('LENGTH', r'{num}{E}{M}'), #{num}em {return EMS;}
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('LENGTH', r'{num}{E}{X}'), #{num}ex {return EXS;}
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('LENGTH', r'{num}{P}{X}'), #{num}px {return LENGTH;}
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('LENGTH', r'{num}{C}{M}'), #{num}cm {return LENGTH;}
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('LENGTH', r'{num}{M}{M}'), #{num}mm {return LENGTH;}
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('LENGTH', r'{num}{I}{N}'), #{num}in {return LENGTH;}
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('LENGTH', r'{num}{P}{T}'), #{num}pt {return LENGTH;}
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('LENGTH', r'{num}{P}{C}'), #{num}pc {return LENGTH;}
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('ANGLE', r'{num}{D}{E}{G}'), #{num}deg {return ANGLE;}
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('ANGLE', r'{num}{R}{A}{D}'), #{num}rad {return ANGLE;}
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('ANGLE', r'{num}{G}{R}{A}{D}'), #{num}grad {return ANGLE;}
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('TIME', r'{num}{M}{S}'), #{num}ms {return TIME;}
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('TIME', r'{num}{S}'), #{num}s {return TIME;}
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('FREQ', r'{num}{H}{Z}'), #{num}Hz {return FREQ;}
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('FREQ', r'{num}{K}{H}{Z}'), #{num}kHz {return FREQ;}
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('DIMEN', r'{num}{ident}'), #{num}{ident} {return DIMEN;}
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('NUMBER', r'{num}'), #{num} {return NUMBER;}
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#('UNICODERANGE', r'U\+{range}'), #U\+{range} {return UNICODERANGE;}
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#('UNICODERANGE', r'U\+{h}{1,6}-{h}{1,6}'), #U\+{h}{1,6}-{h}{1,6} {return UNICODERANGE;}
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# --- CSS3 ---
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('UNICODE-RANGE', r'[0-9A-F?]{1,6}(\-[0-9A-F]{1,6})?'),
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('CDO', r'\<\!\-\-'), #"<!--" {return CDO;}
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('CDC', r'\-\-\>'), #"-->" {return CDC;}
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('S', r'{s}'),# {return S;}
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# \/\*[^*]*\*+([^/*][^*]*\*+)*\/ /* ignore comments */
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# {s}+\/\*[^*]*\*+([^/*][^*]*\*+)*\/ {unput(' '); /*replace by space*/}
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('INCLUDES', r'\~\='), #"~=" {return INCLUDES;}
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('DASHMATCH', r'\|\='), #"|=" {return DASHMATCH;}
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('LBRACE', r'\{'), #{w}"{" {return LBRACE;}
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('PLUS', r'\+'), #{w}"+" {return PLUS;}
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('GREATER', r'\>'), #{w}">" {return GREATER;}
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('COMMA', r'\,'), #{w}"," {return COMMA;}
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('IMPORTANT_SYM', r'\!({w}|{comment})*{I}{M}{P}{O}{R}{T}{A}{N}{T}'), #"!{w}important" {return IMPORTANT_SYM;}
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('COMMENT', '\/\*[^*]*\*+([^/][^*]*\*+)*\/'), # /* ignore comments */
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('CLASS', r'\.'), #. {return *yytext;}
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# --- CSS3! ---
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('CHAR', r'[^"\']'),
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]
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class CSSProductions(object):
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pass
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for i, t in enumerate(PRODUCTIONS):
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setattr(CSSProductions, t[0].replace('-', '_'), t[0])
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