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--
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-- This file is part of FactorCSS
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-- Licensed under the MIT License,
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-- http://www.opensource.org/licenses/mit-license
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-- Copyright 2004 James Bursa <james@semichrome.net>
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--
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-- Parser for CSS 2.1
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-- See CSS 2.1 G.2
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{
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module Parser where
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import Tokeniser
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import CSS
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}
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%name parser
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%tokentype { TokenPosn }
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%token
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S { (S , _) }
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INCLUDES { (INCLUDES , _) }
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DASHMATCH { (DASHMATCH , _) }
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LBRACE { (LBRACE , _) }
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PLUS { (PLUS , _) }
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GREATER { (GREATER , _) }
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COMMA { (COMMA , _) }
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STRING { (STRING $$ , _) }
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IDENT { (IDENT $$ , _) }
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HASH { (HASH $$ , _) }
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IMPORT_SYM { (IMPORT_SYM , _) }
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PAGE_SYM { (PAGE_SYM , _) }
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MEDIA_SYM { (MEDIA_SYM , _) }
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CHARSET_SYM { (CHARSET_SYM , _) }
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IMPORTANT_SYM { (IMPORTANT_SYM, _) }
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EMS { (EMS $$ , _) }
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EXS { (EXS $$ , _) }
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LENGTH { (LENGTH $$ , _) }
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ANGLE { (ANGLE $$ , _) }
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TIME { (TIME $$ , _) }
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FREQ { (FREQ $$ , _) }
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DIMEN { (DIMEN $$ , _) }
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PERCENTAGE { (PERCENTAGE $$, _) }
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NUMBER { (NUMBER $$ , _) }
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URI { (URI $$ , _) }
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FUNCTION { (FUNCTION $$ , _) }
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DELIM { (DELIM $$ , _) }
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SEMI { (SEMI , _) }
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RBRACE { (RBRACE , _) }
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COLON { (COLON , _) }
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SLASH { (SLASH , _) }
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MINUS { (MINUS , _) }
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DOT { (DOT , _) }
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LBRAC { (LBRAC , _) }
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RBRAC { (RBRAC , _) }
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ASTERISK { (ASTERISK , _) }
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EQUALS { (EQUALS , _) }
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RPAREN { (RPAREN , _) }
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%%
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stylesheet :: { Stylesheet }
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: charset s import_list s statement_list s
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{ Stylesheet $1 $3 $5 }
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charset :: { Maybe String }
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: { Nothing }
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| CHARSET_SYM s STRING s SEMI { Just $3 }
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import_list :: { [(String, [String])] }
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: { [] }
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| import_list s import { $3 : $1 }
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import :: { (String, [String]) }
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: IMPORT_SYM s STRING s medium_list SEMI s
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{ ($3, $5) }
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| IMPORT_SYM s URI s medium_list SEMI s { ($3, $5) }
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statement_list :: { [Statement] }
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: { [] }
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| statement_list s statement { $3 : $1 }
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statement :: { Statement }
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: ruleset { $1 }
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| media { $1 }
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| page { $1 }
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medium_list :: { [String] }
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: { [] }
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| medium_list_1 { $1 }
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medium_list_1 :: { [String] }
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: medium { [$1] }
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| medium_list_1 s COMMA s medium { $5 : $1 }
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media :: { Statement }
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: MEDIA_SYM s medium_list_1 LBRACE s ruleset_list RBRACE
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{ Media $3 $6 }
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medium :: { String }
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: IDENT { $1 }
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ruleset_list :: { [Statement] }
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: { [] }
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| ruleset_list s ruleset { $3 : $1 }
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page :: { Statement }
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: PAGE_SYM LBRACE s declaration_list_1 RBRACE
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{ Page Nothing $4 }
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| PAGE_SYM s pseudo_page LBRACE s declaration_list_1 RBRACE
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{ Page (Just $3) $6 }
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declaration_list_1 :: { [Declaration] }
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: { [] }
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| declaration { [$1] }
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| declaration_list_1 s SEMI s { $1 }
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| declaration_list_1 s SEMI s declaration
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{ $5 : $1 }
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pseudo_page :: { String }
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: COLON IDENT { $2 }
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ruleset :: { Statement }
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: selector_list_1 LBRACE s declaration_list_1 RBRACE
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{ Ruleset $1 $4 }
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selector_list_1 :: { [Selector] }
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: selector { [$1] }
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| selector_list_1 COMMA s selector { $4 : $1 }
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selector :: { Selector }
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: simple_selector { [($1, NoMore)] }
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| simple_selector combinator selector
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{ ($1, $2) : $3 }
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combinator :: { Combinator }
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: PLUS s { Preceded }
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| GREATER s { Parent }
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| S { Ancestor }
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simple_selector :: { SimpleSelector }
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: element_name detail_list_1 { ($1, $2) }
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| element_name { ($1, []) }
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| detail_list_1 { (Nothing, $1) }
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element_name :: { Maybe String }
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: IDENT { Just $1 }
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| ASTERISK { Nothing }
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detail_list_1 :: { [Detail] }
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: HASH { [Id $1] }
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| class { [$1] }
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| attrib { [$1] }
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| pseudo { [$1] }
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| detail_list_1 HASH { Id $2 : $1 }
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| detail_list_1 class { $2 : $1 }
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| detail_list_1 attrib { $2 : $1 }
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| detail_list_1 pseudo { $2 : $1 }
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class :: { Detail }
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: DOT IDENT { Class $2 }
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attrib :: { Detail }
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: LBRAC s IDENT s RBRAC { Attrib $3 }
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| LBRAC s IDENT s EQUALS s IDENT s RBRAC
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{ AttribEq $3 $7 }
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| LBRAC s IDENT s EQUALS s STRING s RBRAC
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{ AttribEq $3 $7 }
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| LBRAC s IDENT s INCLUDES s IDENT s RBRAC
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{ AttribInc $3 $7 }
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| LBRAC s IDENT s INCLUDES s STRING s RBRAC
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{ AttribInc $3 $7 }
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| LBRAC s IDENT s DASHMATCH s IDENT s RBRAC
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{ AttribDM $3 $7 }
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| LBRAC s IDENT s DASHMATCH s STRING s RBRAC
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{ AttribDM $3 $7 }
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pseudo :: { Detail }
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: COLON IDENT { Pseudo $2 }
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| COLON FUNCTION s RPAREN { PseudoFunc $2 "" }
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| COLON FUNCTION s IDENT s RPAREN { PseudoFunc $2 $4 }
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declaration :: { Declaration }
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: property COLON s value_list_1 { ($1, $4, False) }
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| property COLON s value_list_1 prio { ($1, $4, True) }
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property :: { String }
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: IDENT s { $1 }
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prio :: { Bool }
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: IMPORTANT_SYM { True }
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value_list :: { [Value] }
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: { [] }
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| value s value_list { $1 : $3 }
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value_list_1 :: { [Value] }
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: value s { [$1] }
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| value s value_list_1 { $1 : $3 }
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value :: { Value }
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: NUMBER { Number $1 }
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| PERCENTAGE { Percentage $1 }
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| LENGTH { Length $1 }
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| EMS { Ems $1 }
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| EXS { Exs $1 }
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| ANGLE { Angle $1 }
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| TIME { Time $1 }
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| FREQ { Freq $1 }
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| STRING { StringV $1 }
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| IDENT { Ident $1 }
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| URI { Uri $1 }
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| HASH { HexColour $1 }
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| SLASH { Slash }
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| COMMA { Comma }
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| FUNCTION s value_list s RPAREN { Function $1 $3 }
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s :: {}
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: { }
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| s S { }
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{
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happyError :: [TokenPosn] -> a
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happyError tks = error ("Parse error at " ++ lcn)
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where
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lcn = case tks of
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[] -> "end of file"
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tk:_ -> "line " ++ show l ++ ", column " ++ show c
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where
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AlexPn _ l c = snd tk
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}
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