| 1 |
-- |
| 2 |
-- This file is part of FactorCSS |
| 3 |
-- Licensed under the MIT License, |
| 4 |
-- http://www.opensource.org/licenses/mit-license |
| 5 |
-- Copyright 2004 James Bursa <james@semichrome.net> |
| 6 |
-- |
| 7 |
|
| 8 |
-- Parser for CSS 2.1 |
| 9 |
-- See CSS 2.1 G.2 |
| 10 |
|
| 11 |
{ |
| 12 |
module Parser where |
| 13 |
import Tokeniser |
| 14 |
import CSS |
| 15 |
} |
| 16 |
|
| 17 |
%name parser |
| 18 |
%tokentype { TokenPosn } |
| 19 |
%token |
| 20 |
S { (S , _) } |
| 21 |
INCLUDES { (INCLUDES , _) } |
| 22 |
DASHMATCH { (DASHMATCH , _) } |
| 23 |
LBRACE { (LBRACE , _) } |
| 24 |
PLUS { (PLUS , _) } |
| 25 |
GREATER { (GREATER , _) } |
| 26 |
COMMA { (COMMA , _) } |
| 27 |
STRING { (STRING $$ , _) } |
| 28 |
IDENT { (IDENT $$ , _) } |
| 29 |
HASH { (HASH $$ , _) } |
| 30 |
IMPORT_SYM { (IMPORT_SYM , _) } |
| 31 |
PAGE_SYM { (PAGE_SYM , _) } |
| 32 |
MEDIA_SYM { (MEDIA_SYM , _) } |
| 33 |
CHARSET_SYM { (CHARSET_SYM , _) } |
| 34 |
IMPORTANT_SYM { (IMPORTANT_SYM, _) } |
| 35 |
EMS { (EMS $$ , _) } |
| 36 |
EXS { (EXS $$ , _) } |
| 37 |
LENGTH { (LENGTH $$ , _) } |
| 38 |
ANGLE { (ANGLE $$ , _) } |
| 39 |
TIME { (TIME $$ , _) } |
| 40 |
FREQ { (FREQ $$ , _) } |
| 41 |
DIMEN { (DIMEN $$ , _) } |
| 42 |
PERCENTAGE { (PERCENTAGE $$, _) } |
| 43 |
NUMBER { (NUMBER $$ , _) } |
| 44 |
URI { (URI $$ , _) } |
| 45 |
FUNCTION { (FUNCTION $$ , _) } |
| 46 |
DELIM { (DELIM $$ , _) } |
| 47 |
SEMI { (SEMI , _) } |
| 48 |
RBRACE { (RBRACE , _) } |
| 49 |
COLON { (COLON , _) } |
| 50 |
SLASH { (SLASH , _) } |
| 51 |
MINUS { (MINUS , _) } |
| 52 |
DOT { (DOT , _) } |
| 53 |
LBRAC { (LBRAC , _) } |
| 54 |
RBRAC { (RBRAC , _) } |
| 55 |
ASTERISK { (ASTERISK , _) } |
| 56 |
EQUALS { (EQUALS , _) } |
| 57 |
RPAREN { (RPAREN , _) } |
| 58 |
|
| 59 |
%% |
| 60 |
|
| 61 |
stylesheet :: { Stylesheet } |
| 62 |
: charset s import_list s statement_list s |
| 63 |
{ Stylesheet $1 $3 $5 } |
| 64 |
|
| 65 |
charset :: { Maybe String } |
| 66 |
: { Nothing } |
| 67 |
| CHARSET_SYM s STRING s SEMI { Just $3 } |
| 68 |
|
| 69 |
import_list :: { [(String, [String])] } |
| 70 |
: { [] } |
| 71 |
| import_list s import { $3 : $1 } |
| 72 |
|
| 73 |
import :: { (String, [String]) } |
| 74 |
: IMPORT_SYM s STRING s medium_list SEMI s |
| 75 |
{ ($3, $5) } |
| 76 |
| IMPORT_SYM s URI s medium_list SEMI s { ($3, $5) } |
| 77 |
|
| 78 |
statement_list :: { [Statement] } |
| 79 |
: { [] } |
| 80 |
| statement_list s statement { $3 : $1 } |
| 81 |
|
| 82 |
statement :: { Statement } |
| 83 |
: ruleset { $1 } |
| 84 |
| media { $1 } |
| 85 |
| page { $1 } |
| 86 |
|
| 87 |
medium_list :: { [String] } |
| 88 |
: { [] } |
| 89 |
| medium_list_1 { $1 } |
| 90 |
|
| 91 |
medium_list_1 :: { [String] } |
| 92 |
: medium { [$1] } |
| 93 |
| medium_list_1 s COMMA s medium { $5 : $1 } |
| 94 |
|
| 95 |
media :: { Statement } |
| 96 |
: MEDIA_SYM s medium_list_1 LBRACE s ruleset_list RBRACE |
| 97 |
{ Media $3 $6 } |
| 98 |
|
| 99 |
medium :: { String } |
| 100 |
: IDENT { $1 } |
| 101 |
|
| 102 |
ruleset_list :: { [Statement] } |
| 103 |
: { [] } |
| 104 |
| ruleset_list s ruleset { $3 : $1 } |
| 105 |
|
| 106 |
page :: { Statement } |
| 107 |
: PAGE_SYM LBRACE s declaration_list_1 RBRACE |
| 108 |
{ Page Nothing $4 } |
| 109 |
| PAGE_SYM s pseudo_page LBRACE s declaration_list_1 RBRACE |
| 110 |
{ Page (Just $3) $6 } |
| 111 |
|
| 112 |
declaration_list_1 :: { [Declaration] } |
| 113 |
: { [] } |
| 114 |
| declaration { [$1] } |
| 115 |
| declaration_list_1 s SEMI s { $1 } |
| 116 |
| declaration_list_1 s SEMI s declaration |
| 117 |
{ $5 : $1 } |
| 118 |
|
| 119 |
pseudo_page :: { String } |
| 120 |
: COLON IDENT { $2 } |
| 121 |
|
| 122 |
ruleset :: { Statement } |
| 123 |
: selector_list_1 LBRACE s declaration_list_1 RBRACE |
| 124 |
{ Ruleset $1 $4 } |
| 125 |
|
| 126 |
selector_list_1 :: { [Selector] } |
| 127 |
: selector { [$1] } |
| 128 |
| selector_list_1 COMMA s selector { $4 : $1 } |
| 129 |
|
| 130 |
selector :: { Selector } |
| 131 |
: simple_selector { [($1, NoMore)] } |
| 132 |
| simple_selector combinator selector |
| 133 |
{ ($1, $2) : $3 } |
| 134 |
|
| 135 |
combinator :: { Combinator } |
| 136 |
: PLUS s { Preceded } |
| 137 |
| GREATER s { Parent } |
| 138 |
| S { Ancestor } |
| 139 |
|
| 140 |
simple_selector :: { SimpleSelector } |
| 141 |
: element_name detail_list_1 { ($1, $2) } |
| 142 |
| element_name { ($1, []) } |
| 143 |
| detail_list_1 { (Nothing, $1) } |
| 144 |
|
| 145 |
element_name :: { Maybe String } |
| 146 |
: IDENT { Just $1 } |
| 147 |
| ASTERISK { Nothing } |
| 148 |
|
| 149 |
detail_list_1 :: { [Detail] } |
| 150 |
: HASH { [Id $1] } |
| 151 |
| class { [$1] } |
| 152 |
| attrib { [$1] } |
| 153 |
| pseudo { [$1] } |
| 154 |
| detail_list_1 HASH { Id $2 : $1 } |
| 155 |
| detail_list_1 class { $2 : $1 } |
| 156 |
| detail_list_1 attrib { $2 : $1 } |
| 157 |
| detail_list_1 pseudo { $2 : $1 } |
| 158 |
|
| 159 |
class :: { Detail } |
| 160 |
: DOT IDENT { Class $2 } |
| 161 |
|
| 162 |
attrib :: { Detail } |
| 163 |
: LBRAC s IDENT s RBRAC { Attrib $3 } |
| 164 |
| LBRAC s IDENT s EQUALS s IDENT s RBRAC |
| 165 |
{ AttribEq $3 $7 } |
| 166 |
| LBRAC s IDENT s EQUALS s STRING s RBRAC |
| 167 |
{ AttribEq $3 $7 } |
| 168 |
| LBRAC s IDENT s INCLUDES s IDENT s RBRAC |
| 169 |
{ AttribInc $3 $7 } |
| 170 |
| LBRAC s IDENT s INCLUDES s STRING s RBRAC |
| 171 |
{ AttribInc $3 $7 } |
| 172 |
| LBRAC s IDENT s DASHMATCH s IDENT s RBRAC |
| 173 |
{ AttribDM $3 $7 } |
| 174 |
| LBRAC s IDENT s DASHMATCH s STRING s RBRAC |
| 175 |
{ AttribDM $3 $7 } |
| 176 |
|
| 177 |
pseudo :: { Detail } |
| 178 |
: COLON IDENT { Pseudo $2 } |
| 179 |
| COLON FUNCTION s RPAREN { PseudoFunc $2 "" } |
| 180 |
| COLON FUNCTION s IDENT s RPAREN { PseudoFunc $2 $4 } |
| 181 |
|
| 182 |
declaration :: { Declaration } |
| 183 |
: property COLON s value_list_1 { ($1, $4, False) } |
| 184 |
| property COLON s value_list_1 prio { ($1, $4, True) } |
| 185 |
|
| 186 |
property :: { String } |
| 187 |
: IDENT s { $1 } |
| 188 |
|
| 189 |
prio :: { Bool } |
| 190 |
: IMPORTANT_SYM { True } |
| 191 |
|
| 192 |
value_list :: { [Value] } |
| 193 |
: { [] } |
| 194 |
| value s value_list { $1 : $3 } |
| 195 |
|
| 196 |
value_list_1 :: { [Value] } |
| 197 |
: value s { [$1] } |
| 198 |
| value s value_list_1 { $1 : $3 } |
| 199 |
|
| 200 |
value :: { Value } |
| 201 |
: NUMBER { Number $1 } |
| 202 |
| PERCENTAGE { Percentage $1 } |
| 203 |
| LENGTH { Length $1 } |
| 204 |
| EMS { Ems $1 } |
| 205 |
| EXS { Exs $1 } |
| 206 |
| ANGLE { Angle $1 } |
| 207 |
| TIME { Time $1 } |
| 208 |
| FREQ { Freq $1 } |
| 209 |
| STRING { StringV $1 } |
| 210 |
| IDENT { Ident $1 } |
| 211 |
| URI { Uri $1 } |
| 212 |
| HASH { HexColour $1 } |
| 213 |
| SLASH { Slash } |
| 214 |
| COMMA { Comma } |
| 215 |
| FUNCTION s value_list s RPAREN { Function $1 $3 } |
| 216 |
|
| 217 |
s :: {} |
| 218 |
: { } |
| 219 |
| s S { } |
| 220 |
|
| 221 |
{ |
| 222 |
happyError :: [TokenPosn] -> a |
| 223 |
happyError tks = error ("Parse error at " ++ lcn) |
| 224 |
where |
| 225 |
lcn = case tks of |
| 226 |
[] -> "end of file" |
| 227 |
tk:_ -> "line " ++ show l ++ ", column " ++ show c |
| 228 |
where |
| 229 |
AlexPn _ l c = snd tk |
| 230 |
} |
Parent Directory
| 
Revision Log