parser.y

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%{

/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 2002-2003 Lars Knoll ([e-mail])
 *  Copyright (C) 2004 Apple Computer, Inc.
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdlib.h>

#include <dom/dom_string.h>
#include <xml/dom_docimpl.h>
#include <css/css_ruleimpl.h>
#include <css/css_stylesheetimpl.h>
#include <css/css_valueimpl.h>
#include <misc/htmlhashes.h>
#include "cssparser.h"

#include "xml_namespace_table.h"
    
#include <assert.h>
#include <kdebug.h>
// #define CSS_DEBUG

using namespace DOM;

//
// The following file defines the function
//     const struct props *findProp(const char *word, int len)
//
// with 'props->id' a CSS property in the range from CSS_PROP_MIN to
// (and including) CSS_PROP_TOTAL-1

// turn off inlining to void warning with newer gcc
#undef __inline
#define __inline
#include "cssproperties.c"
#include "cssvalues.c"
#undef __inline

int DOM::getPropertyID(const char *tagStr, int len)
{
    const struct props *propsPtr = findProp(tagStr, len);
    if (!propsPtr)
        return 0;

    return propsPtr->id;
}

static inline int getValueID(const char *tagStr, int len)
{
    const struct css_value *val = findValue(tagStr, len);
    if (!val)
        return 0;

    return val->id;
}


#define YYDEBUG 0
#define YYMAXDEPTH 0
#define YYPARSE_PARAM parser
%}

%pure_parser

%union {
    CSSRuleImpl *rule;
    CSSSelector *selector;
    bool ok;
    MediaListImpl *mediaList;
    CSSMediaRuleImpl *mediaRule;
    CSSRuleListImpl *ruleList;
    ParseString string;
    float val;
    int prop_id;
    int attribute;
    int element;
    CSSSelector::Relation relation;
    bool b;
    char tok;
    Value value;
    ValueList *valueList;
}

%{

static inline int cssyyerror(const char *x ) {
#ifdef CSS_DEBUG
    qDebug( x );
#else
    Q_UNUSED( x );
#endif
    return 1;
}

static int cssyylex( YYSTYPE *yylval ) {
    return CSSParser::current()->lex( yylval );
}


%}

%expect 12

%token WHITESPACE SGML_CD

%token INCLUDES
%token DASHMATCH
%token BEGINSWITH
%token ENDSWITH
%token CONTAINS

%token <string> STRING

%token <string> IDENT

%token <string> HASH
%token ':'
%token '.'
%token '['

%token IMPORT_SYM
%token PAGE_SYM
%token MEDIA_SYM
%token FONT_FACE_SYM
%token CHARSET_SYM
%token NAMESPACE_SYM
%token KHTML_RULE_SYM
%token KHTML_DECLS_SYM
%token KHTML_VALUE_SYM

%token IMPORTANT_SYM

%token <val> QEMS
%token <val> EMS
%token <val> EXS
%token <val> PXS
%token <val> CMS
%token <val> MMS
%token <val> INS
%token <val> PTS
%token <val> PCS
%token <val> DEGS
%token <val> RADS
%token <val> GRADS
%token <val> MSECS
%token <val> SECS
%token <val> HERZ
%token <val> KHERZ
%token <string> DIMEN
%token <val> PERCENTAGE
%token <val> NUMBER

%token <string> URI
%token <string> FUNCTION

%token <string> UNICODERANGE

%type <relation> combinator

%type <rule> ruleset
%type <rule> media
%type <rule> import
%type <rule> page
%type <rule> font_face
%type <rule> invalid_rule
%type <rule> invalid_at
%type <rule> invalid_import
%type <rule> rule

%type <string> maybe_ns_prefix

%type <string> namespace_selector

%type <string> string_or_uri
%type <string> ident_or_string
%type <string> medium
%type <string> hexcolor

%type <mediaList> media_list
%type <mediaList> maybe_media_list

%type <ruleList> ruleset_list

%type <prop_id> property

%type <selector> specifier
%type <selector> specifier_list
%type <selector> simple_selector
%type <selector> selector
%type <selector> selector_list
%type <selector> class
%type <selector> attrib
%type <selector> pseudo

%type <ok> declaration_list
%type <ok> decl_list
%type <ok> declaration

%type <b> prio

%type <val> match
%type <val> unary_operator
%type <tok> operator

%type <valueList> expr
%type <value> term
%type <value> unary_term
%type <value> function

%type <element> element_name

%type <attribute> attrib_id

%%

stylesheet:
    maybe_charset maybe_sgml import_list namespace_list rule_list
  | khtml_rule maybe_space
  | khtml_decls maybe_space
  | khtml_value maybe_space
  ;

khtml_rule:
    KHTML_RULE_SYM '{' maybe_space ruleset maybe_space '}' {
        CSSParser *p = static_cast<CSSParser *>(parser);
        p->rule = $4;
    }
;

khtml_decls:
    KHTML_DECLS_SYM '{' maybe_space declaration_list '}' {
	/* can be empty */
    }
;

khtml_value:
    KHTML_VALUE_SYM '{' maybe_space expr '}' {
	CSSParser *p = static_cast<CSSParser *>(parser);
	if ( $4 ) {
	    p->valueList = $4;
#ifdef CSS_DEBUG
	    kdDebug( 6080 ) << "   got property for " << p->id <<
		(p->important?" important":"")<< endl;
	    bool ok =
#endif
		p->parseValue( p->id, p->important );
#ifdef CSS_DEBUG
	    if ( !ok )
		kdDebug( 6080 ) << "     couldn't parse value!" << endl;
#endif
	}
#ifdef CSS_DEBUG
	else
	    kdDebug( 6080 ) << "     no value found!" << endl;
#endif
	delete p->valueList;
	p->valueList = 0;
    }
;

maybe_space:
    /* empty */
  | maybe_space WHITESPACE
  ;

maybe_sgml:
    /* empty */
  | maybe_sgml SGML_CD
  | maybe_sgml WHITESPACE
  ;

maybe_charset:
   /* empty */
 | CHARSET_SYM maybe_space STRING maybe_space ';' {
#ifdef CSS_DEBUG
     kdDebug( 6080 ) << "charset rule: " << qString($3) << endl;
#endif
 }
  | CHARSET_SYM error invalid_block
  | CHARSET_SYM error ';'
 ;

import_list:
 /* empty */
 | import_list import maybe_sgml {
     CSSParser *p = static_cast<CSSParser *>(parser);
     if ( $2 && p->styleElement && p->styleElement->isCSSStyleSheet() ) {
	 p->styleElement->append( $2 );
     } else {
	 delete $2;
     }
 }
 ;

namespace_list:
/* empty */
| namespace_list namespace maybe_sgml
;

rule_list:
   /* empty */
 | rule_list rule maybe_sgml {
     CSSParser *p = static_cast<CSSParser *>(parser);
     if ( $2 && p->styleElement && p->styleElement->isCSSStyleSheet() ) {
	 p->styleElement->append( $2 );
     } else {
	 delete $2;
     }
 }
 ;

rule:
    ruleset
  | media
  | page
  | font_face
  | invalid_rule
  | invalid_at
  | invalid_import
    ;

import:
    IMPORT_SYM maybe_space string_or_uri maybe_space maybe_media_list ';' {
#ifdef CSS_DEBUG
	kdDebug( 6080 ) << "@import: " << qString($3) << endl;
#endif
	CSSParser *p = static_cast<CSSParser *>(parser);
	if ( $5 && p->styleElement && p->styleElement->isCSSStyleSheet() )
	    $$ = new CSSImportRuleImpl( p->styleElement, domString($3), $5 );
	else {
	    $$ = 0;
            delete $5;
        }
    }
  | IMPORT_SYM error invalid_block {
        $$ = 0;
    }
  | IMPORT_SYM error ';' {
        $$ = 0;
    }
  ;

namespace:
NAMESPACE_SYM maybe_space maybe_ns_prefix string_or_uri maybe_space ';' {
#ifdef CSS_DEBUG
    kdDebug( 6080 ) << "@namespace: " << qString($4) << endl;
#endif
    CSSParser *p = static_cast<CSSParser *>(parser);
    if (p->styleElement && p->styleElement->isCSSStyleSheet())
        static_cast<CSSStyleSheetImpl*>(p->styleElement)->addNamespace(p, domString($3), domString($4));
}
| NAMESPACE_SYM error invalid_block
| NAMESPACE_SYM error ';'
;

maybe_ns_prefix:
/* empty */ { $$.string = 0; }
| IDENT WHITESPACE { $$ = $1; }
;

string_or_uri:
STRING
| URI
;

maybe_media_list:
     /* empty */ {
        $$ = new MediaListImpl();
     }
     | media_list
;


media_list:
    /* empty */ {
	$$ = 0;
    }
    | medium {
	$$ = new MediaListImpl();
	$$->appendMedium( domString($1).lower() );
    }
    | media_list ',' maybe_space medium {
	$$ = $1;
        if ($$)
	    $$->appendMedium( domString($4) );
    }
    | media_list error {
        delete $1;
        $$ = 0;
    }
    ;

media:
    MEDIA_SYM maybe_space media_list '{' maybe_space ruleset_list '}' {
	CSSParser *p = static_cast<CSSParser *>(parser);
	if ( $3 && $6 &&
	     p->styleElement && p->styleElement->isCSSStyleSheet() ) {
	    $$ = new CSSMediaRuleImpl( static_cast<CSSStyleSheetImpl*>(p->styleElement), $3, $6 );
	} else {
	    $$ = 0;
	    delete $3;
	    delete $6;
	}
    }
  ;

ruleset_list:
    /* empty */ { $$ = 0; }
  | ruleset_list ruleset maybe_space {
      $$ = $1;
      if ( $2 ) {
	  if ( !$$ ) $$ = new CSSRuleListImpl();
	  $$->append( $2 );
      }
  }
    ;

medium:
  IDENT maybe_space {
      $$ = $1;
  }
  ;

/*
page:
    PAGE_SYM maybe_space IDENT? pseudo_page? maybe_space
    '{' maybe_space declaration [ ';' maybe_space declaration ]* '}' maybe_space
  ;

pseudo_page
  : ':' IDENT
  ;

font_face
  : FONT_FACE_SYM maybe_space
    '{' maybe_space declaration [ ';' maybe_space declaration ]* '}' maybe_space
  ;
*/

page:
    PAGE_SYM error invalid_block {
      $$ = 0;
    }
  | PAGE_SYM error ';' {
      $$ = 0;
    }
    ;

font_face:
    FONT_FACE_SYM error invalid_block {
      $$ = 0;
    }
  | FONT_FACE_SYM error ';' {
      $$ = 0;
    }
;

combinator:
  '+' maybe_space { $$ = CSSSelector::Sibling; }
  | '>' maybe_space { $$ = CSSSelector::Child; }
  | /* empty */ { $$ = CSSSelector::Descendant; }
  ;

unary_operator:
    '-' { $$ = -1; }
  | '+' { $$ = 1; }
  ;

ruleset:
    selector_list '{' maybe_space declaration_list '}' {
#ifdef CSS_DEBUG
	kdDebug( 6080 ) << "got ruleset" << endl << "  selector:" << endl;
#endif
	CSSParser *p = static_cast<CSSParser *>(parser);
	if ( $1 ) {
            CSSStyleRuleImpl *rule = new CSSStyleRuleImpl( p->styleElement );
            CSSMutableStyleDeclarationImpl *decl = p->createStyleDeclaration( rule );
            rule->setSelector( $1 );
            rule->setDeclaration(decl);
            $$ = rule;
	} else {
	    $$ = 0;
	    p->clearProperties();
	}
    }
  ;

selector_list:
    selector {
	if ( $1 ) {
	    $$ = $1;
#ifdef CSS_DEBUG
	    kdDebug( 6080 ) << "   got simple selector:" << endl;
	    $1->print();
#endif
	} else {
	    $$ = 0;
	}
    }
    | selector_list ',' maybe_space selector {
	if ( $1 && $4 ) {
	    $$ = $1;
	    $$->append( $4 );
#ifdef CSS_DEBUG
	    kdDebug( 6080 ) << "   got simple selector:" << endl;
	    $4->print();
#endif
	} else {
            delete $1;
            delete $4;
            $$ = 0;
        }
    }
  | selector_list error {
        delete $1;
        $$ = 0;
    }
   ;

selector:
    simple_selector {
	$$ = $1;
    }
    | selector combinator simple_selector {
    	$$ = $3;
        if (!$1) {
            delete $3;
            $$ = 0;
        }
        else if ($$) {