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/*
 * Copyright 2006 Ethan Nicholas. All rights reserved.
 * Use is subject to license terms.
 */
 
// I would love to have used an existing CSS parser, but all of the ones I could
// find are licensed under the LGPL.  As JAXX is BSD licensed and I'm not a big
// fan of the LGPL, unfortunately that won't work.
options {
  STATIC = false;
  JDK_VERSION = "1.4";
  NODE_SCOPE_HOOK = true;
}

PARSER_BEGIN(CSSParser)
package jaxx.css;

public class CSSParser {
    public SimpleNode popNode() {
        if ( jjtree.nodeArity() > 0)  // number of child nodes 
            return (SimpleNode)jjtree.popNode();
        else
            return null;
    }

    void jjtreeOpenNodeScope(Node n) {
        ((SimpleNode) n).firstToken = getToken(1);
    }

    void jjtreeCloseNodeScope(Node n) {
        ((SimpleNode) n).lastToken = getToken(0);
    }

  public static void main(String args[]) {
    System.out.println("Reading from standard input...");
    CSSParser css = new CSSParser(System.in);
    try {
      SimpleNode n = css.Stylesheet();
      n.dump("");
      System.out.println("Thank you.");
    } catch (Exception e) {
      System.out.println("Oops.");
      System.out.println(e.getMessage());
      e.printStackTrace();
    }
  }
}

PARSER_END(CSSParser)


 SKIP :
{
  " "
| "\t"
| "\n"
| "\r"
| <"//" (~["\n","\r"])* ("\n"|"\r"|"\r\n")>
| <"/*" (~["*"])* "*" (~["/"] (~["*"])* "*")* "/">
}

<*> TOKEN : /* LITERALS */
{
   ("." )?>
|
  <#INTEGER_LITERAL: (["0"-"9"])+>
}

 TOKEN : /* IDENTIFIER */
{
   (|)*>
|
  <#LETTER: ["_", "-", "a"-"z", "A"-"Z"]>
|
  <#DIGIT: ["0"-"9"]>
}

 TOKEN : /* PSEUDOCLASS_IDENTIFIER */
{
  > : DEFAULT
}

 TOKEN: /* COLON */
{
   : IN_PSEUDOCLASS
}

 TOKEN: /* COLON_IN_RULE */
{
   
}

<*> TOKEN: /* SEMICOLON */
{
  
}

TOKEN : /* LEFT BRACE */
{
   : IN_RULE
}

 TOKEN : /* RIGHT BRACE */
{
   : DEFAULT
}

 TOKEN : /* JAVA_CODE_RULE START */
{
  > : JAVA_CODE_RULE
}

 TOKEN : /* JAVA_CODE_RULE */
{
  
}

 TOKEN : /* JAVA_CODE_RULE END */
{
  > : IN_RULE
}

  
 TOKEN : /* PROGRAMMATIC_PSEUDOCLASS */
{
   : DEFAULT
}
  
 TOKEN : /* STRINGS */
{
  
}

 TOKEN : /* COLORS */
{
     (  )?>
|
  <#HEXDIGIT: ["0"-"9", "a"-"f", "A"-"F"]>
}


 TOKEN : /* EMS */
{
   "em">
}


 TOKEN : /* EXS */
{
   "ex">
}


 TOKEN : /* LENGTH */
{
   ("pt" | "mm" | "cm" | "pc" | "in")>
}


SimpleNode Stylesheet() : {}
{
  (Rule())*
  { return jjtThis; }
}


void Rule() : {}
{
  Selectors()
   Declaration() (";" (Declaration())?)* 
}


void Selectors() : {}
{
  Selector() ("," Selector())*
}


void Selector() : {}
{
  JavaClass() (Id())? (Class())? (PseudoClass())?
| 
  Id() (Class())? (PseudoClass())?
|
  Class() (PseudoClass())?
|
  PseudoClass()
}


void JavaClass() : {}
{
   | "*"
}


void Id() : {}
{
  "#" 
}


void Class() : {}
{
  "." 
}


void PseudoClass() : {}
{
   ( | ) (AnimationProperties())?
}


void AnimationProperties() : {}
{
  "[" AnimationProperty() ("," AnimationProperty())* "]"
}


void AnimationProperty() : {}
{
   "="  ()?
}


void Declaration() : {}
{
  Property()  Expression()
}


void Property() : {}
{
  
}


void Expression() : {}
{
   ( |  |  |  |  |  |  |
      JavaCode())
}


void JavaCode() : {}
{
	  
}


void Identifier() : {}
{
  
}