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pmd/pmd-jsp/etc/grammar/JspParser.jjt
justprv 7cf231bd01 #1402 ignore quoted jsp end tag
2018-10-23 12:58:25 +04:00

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/*
* Allow boolean attributes
*
* Juan Martín Sotuyo Dodero 06/2017
*====================================================================
* Added capability for Tracking Tokens.
*
* Amit Kumar Prasad 10/2015
*====================================================================
* JSP Parser for PMD.
* It supports supports more-or-less well written JSP files.
* The JSP Document style is supported, except for inline DTD.
* The JSP Page style (<% ... %>) is supported.
* Java code is not parsed.
* Script code inside <script> ... </script> is not parsed.
*/
options {
USER_CHAR_STREAM = true;
NODE_USES_PARSER=true;
UNICODE_INPUT=true;
FORCE_LA_CHECK = false;
IGNORE_CASE = true;
STATIC = false;
MULTI=true;
VISITOR=true;
TRACK_TOKENS = true;
}
PARSER_BEGIN(JspParser)
package net.sourceforge.pmd.lang.jsp.ast;
import net.sourceforge.pmd.lang.ast.CharStream;
import net.sourceforge.pmd.lang.ast.TokenMgrError;
/**
* JSP Parser for PMD.
* @author Pieter, Application Engineers NV/SA, http://www.ae.be
*/
public class JspParser {
/**
* Counter used to keep track of unclosed tags
*/
private OpenTagRegister tagRegister = new OpenTagRegister();
/**
* Return the contents of a quote.
* @param quote String - starting and ending with " or '
* @return String a substring of quote: quote without the first and list
* character.
*/
private static String quoteContent(String quote) {
return quote.substring(1, quote.length()-1);
}
/**
* Return the contents of a EL expression or a Value Binding expression.
* @param expression String - starting with ${ or #{ and ending with }
* @return String a substring of expression: expression without the first two and list
* characters.
*/
private static String expressionContent(String expression) {
return expression.substring(2, expression.length()-1).trim();
}
}
PARSER_END(JspParser)
/** ******************************************************************** */
/** ************************* JSP LEXICON **************************** */
/** ******************************************************************** */
/* This JavaCC lexicon has the following states:
* - StartTagState : this is the state entered after the "<" of a tag, until a
* non-whitespace is found.
* This is only for tags, not for xml-comments, declarations, etc.
* - AfterTagState : this is the state entered after the closing ">" of a tag,
* or xml-comment or declaration, until some non-whitespace is found
* - CommentState : the state between "<!--" and "-->"
* - DeclarationState : the state between "<?" or "<!" and ">"
* - CDataState : the state between "<![DATA[" and "]]>"
* - InTagState : the state when inside a tag
* - AttrValueStatue : the state when starting an attribute value, before the starting single or double quote
* - DocTypeState : the state when inside a doctype declaration
* - ElExpressionState : the state when inside a ElExpression
* - DocTypeState : inside a document type declaration
* - DocTypeExternalIdState : inside an "external id" part of a dtd
* - AttrValueBetweenSingleQuotesState : inside an attribute that is surrounded by single quotes (')
* - AttrValueBetweenDoubleQuotesState : inside an attribute that is surrounded by double quotes (")
* - JspDirectiveState : inside a JSP directive not yet reaching the attributes of the directive
* - JspDirectiveAttributesState : inside the attributes part of a directive
* - JspScriptletState : inside a scriptlet <% ... %>
* - JspExpressionState : inside an expression <%= ... %>
* - JspDeclarationState : inside a declaration <%! ... %>
* - JspCommentState : inside a comment <%-- ... --%>
* - HtmlScriptContentState : inside an HTML script <script> ... </script>
*/
<*> TOKEN :
{
<#ALPHA_CHAR: [
"\u0024",
"\u0041"-"\u005a",
"\u005f",
"\u0061"-"\u007a",
"\u00c0"-"\u00d6",
"\u00d8"-"\u00f6",
"\u00f8"-"\u00ff"
] >
| <#NUM_CHAR: [
"\u0030"-"\u0039"
] >
| <#ALPHANUM_CHAR: ( <ALPHA_CHAR> | <NUM_CHAR> ) >
| <#IDENTIFIER_CHAR: ( <ALPHANUM_CHAR> | [ "_", "-", ".", ":" ] ) >
| <#IDENTIFIER: <ALPHA_CHAR> (<IDENTIFIER_CHAR>)* >
| <#XMLNAME: (<ALPHA_CHAR> | "_" | ":") (<IDENTIFIER_CHAR>)* >
| <#QUOTED_STRING_NO_BREAKS: ( "'" ( ~["'", "\r", "\n"] )* "'" )
| ( "\"" ( ~["\"", "\r", "\n"] )* "\"" ) >
| <#QUOTED_STRING: ( "'" ( ~["'"] )* "'" ) | ( "\"" ( ~["\""] )* "\"" ) >
| <#WHITESPACE: ( " " | "\t" | "\n" | "\r" ) >
| <#NEWLINE: ( "\r\n" | "\r" | "\n" ) >
| <#QUOTE: ( "'" | "\"" )>
| <#NO_WHITESPACE_OR_LT_OR_DOLLAR: (~[" ", "\t", "\n", "\r", "<", "$", "#"])>
| <#DOLLAR_OR_HASH: ("$" | "#")>
| <#NO_OPENBRACE: (~["{"]) >
| <#NO_LT_OR_DOLLAR_OR_HASH: (~["<","$","#"])>
| <#NO_ENDTAG_START: (~["<"]~["/"]) >
| <#TEXT_IN_EL: (~["}", "'", "\""])+ >
| <#EL_ESCAPE: ("\\${" | "\\#{") >
// anything but --%>
| <#NO_JSP_COMMENT_END: (~["-"] | "-" ~["-"] | "--" ~["%"] | "--%" ~[">"])+ >
| <#NO_JSP_TAG_END: ( ~["%"] | ("%" ~[">"]) )+ >
| <#NO_JSP_TAG_END_EXCEPT_QUOTED: ( ~["%", "\"", "'"] | ("%" ~[">"]) | <QUOTED_STRING> )+ >
}
<DEFAULT, JspDirectiveState, JspDirectiveAttributesState> SKIP :
{
< (<WHITESPACE>)+ >
}
<AfterTagState, InTagState, HtmlScriptContentState> SPECIAL_TOKEN :
{
< (<WHITESPACE>)+ >
}
<DEFAULT, AfterTagState> TOKEN :
{
<TAG_START: "<" > : StartTagState
| <ENDTAG_START: "</" > : StartTagState
| <COMMENT_START: "<!--" > : CommentState
| <DECL_START: "<?" > : StartTagState
| <DOCTYPE_DECL_START: "<!DOCTYPE" > : DocTypeState
| <CDATA_START: "<![CDATA[" > : CDataState
| <JSP_COMMENT_START: "<%--" > : JspCommentState
| <JSP_DECLARATION_START: "<%!" > : JspDeclarationState
| <JSP_EXPRESSION_START: "<%=" > : JspExpressionState
| <JSP_SCRIPTLET_START: "<%" > : JspScriptletState
| <JSP_DIRECTIVE_START: "<%@" > : JspDirectiveState
| <HTML_SCRIPT_START: "<script" > : InTagState
}
<AfterTagState> TOKEN :
{
<EL_EXPRESSION:
( "${" (<QUOTED_STRING> | <TEXT_IN_EL>)* "}")
|
("#{" (<QUOTED_STRING> | <TEXT_IN_EL>)* "}")
>
| <UNPARSED_TEXT: ( <NO_LT_OR_DOLLAR_OR_HASH>|
<DOLLAR_OR_HASH><NO_OPENBRACE>|
<EL_ESCAPE>)+ >
}
<JspDirectiveState> TOKEN :
{
<JSP_DIRECTIVE_NAME: <IDENTIFIER> > : JspDirectiveAttributesState
}
<JspDirectiveAttributesState> TOKEN :
{
<JSP_DIRECTIVE_ATTRIBUTE_NAME: <IDENTIFIER> >
| <JSP_DIRECTIVE_ATTRIBUTE_EQUALS: "=" >
| <JSP_DIRECTIVE_ATTRIBUTE_VALUE: <QUOTED_STRING> >
| <JSP_DIRECTIVE_END: "%>" > : AfterTagState
}
<JspScriptletState> TOKEN :
{
<JSP_SCRIPTLET_END: "%>" > : AfterTagState
| <JSP_SCRIPTLET: <NO_JSP_TAG_END_EXCEPT_QUOTED> >
}
<JspExpressionState> TOKEN :
{
<JSP_EXPRESSION_END: "%>" > : AfterTagState
| <JSP_EXPRESSION: <NO_JSP_TAG_END> >
}
<JspDeclarationState> TOKEN :
{
<JSP_DECLARATION_END: "%>" > : AfterTagState
| <JSP_DECLARATION: <NO_JSP_TAG_END_EXCEPT_QUOTED> >
}
<JspCommentState> TOKEN :
{
<JSP_COMMENT_END: "--%>" > : AfterTagState
| <JSP_COMMENT_CONTENT: <NO_JSP_COMMENT_END> >
}
<DocTypeState, DocTypeExternalIdState> TOKEN :
{
<WHITESPACES: (<WHITESPACE>)+ >
}
<DocTypeState> TOKEN:
{
<NAME: (<XMLNAME>) > : DocTypeExternalIdState
}
<DocTypeExternalIdState> TOKEN:
{
<PUBLIC: "PUBLIC">
| <SYSTEM: "SYSTEM">
| <DOCTYPE_DECL_END: ">" > : AfterTagState
| <QUOTED_LITERAL: (<QUOTED_STRING>) >
}
<CDataState> TOKEN :
{
<UNPARSED: (~[]) >
| <CDATA_END: ("]]>") > : AfterTagState
}
<StartTagState> TOKEN :
{
<TAG_NAME: <IDENTIFIER> > : InTagState
| <LST_ERROR: ~[]> : DEFAULT
}
<InTagState> TOKEN :
{
<ATTR_NAME: (<IDENTIFIER> | "${" (<QUOTED_STRING> | <TEXT_IN_EL>)* "}") >
| <TAG_END: ">" > : AfterTagState
| <DECL_END: ("?>" | "!>") > : AfterTagState
| <TAG_SLASHEND: "/>" > : AfterTagState
| <ATTR_EQ: "=" > : AttrValueState
| <IN_TAG_ERROR: ~[]>
}
<AttrValueState> TOKEN :
{
<SINGLE_QUOTE: "'"> : AttrValueBetweenSingleQuotesState
| <DOUBLE_QUOTE: "\""> : AttrValueBetweenDoubleQuotesState
| <NO_QUOTE_NO_WHITESPACE: ~["\"","'"," "] > { input_stream.backup(1);} : AttrValueNoQuotesState
| <IN_ATTR_WHITESPACE: [" "] > : InTagState //support for empty attributes
}
<AttrValueBetweenSingleQuotesState, AttrValueBetweenDoubleQuotesState,AttrValueNoQuotesState> TOKEN:
{
<EL_EXPRESSION_IN_ATTRIBUTE: "${" (<QUOTED_STRING> | <TEXT_IN_EL>)* "}" >
| <VALUE_BINDING_IN_ATTRIBUTE: "#{" (<QUOTED_STRING> | <TEXT_IN_EL>)* "}" >
| <JSP_EXPRESSION_IN_ATTRIBUTE: "<%=" <NO_JSP_TAG_END> "%>" >
}
<AttrValueNoQuotesState> TOKEN :
{
<ENDING_WHITESPACE: " " >: InTagState
| <UNPARSED_TEXT_NO_WHITESPACE: ( ~["$", "#", " "] |(["$", "#"] ~["{"]) | <EL_ESCAPE> )+ >
}
<AttrValueBetweenSingleQuotesState> TOKEN :
{
<ENDING_SINGLE_QUOTE: "'"> : InTagState
| <UNPARSED_TEXT_NO_SINGLE_QUOTES:
( (~["$", "#", "'"]) | (["$", "#"] ~["{", "'"]) | <EL_ESCAPE> )+ >
| <DOLLAR_OR_HASH_SINGLE_QUOTE: ["$", "#"] "'" > : InTagState
}
<AttrValueBetweenDoubleQuotesState> TOKEN :
{
<ENDING_DOUBLE_QUOTE: "\""> : InTagState
| <UNPARSED_TEXT_NO_DOUBLE_QUOTES:
( (~["$", "#", "\""]) | (["$", "#"] ~["{", "\""]) | <EL_ESCAPE> )+ >
| <DOLLAR_OR_HASH_DOUBLE_QUOTE: ["$", "#"] "\"" > : InTagState
}
<CommentState> TOKEN :
{
< COMMENT_END: ("--" (" ")* ">" | "->") > : AfterTagState
| < COMMENT_TEXT: (~[]) >
}
<HtmlScriptContentState> TOKEN :
{
<HTML_SCRIPT_CONTENT: (~[]) >
| <HTML_SCRIPT_END_TAG : "</script" | "</Script" | "</SCRIPT"> : AfterTagState
}
/** ******************************************************************** */
/** ************************* JSP GRAMMAR **************************** */
/** ******************************************************************** */
/**
* The root of the AST of a JSP.
*/
ASTCompilationUnit CompilationUnit() :
{}
{
Prolog()
Content() <EOF>
{ return jjtThis; }
}
/**
* The optional prolog of a JSP, including (xml) declarations and DTD.
*/
void Prolog() #void :
{}
{
(
LOOKAHEAD( ( CommentTag() | JspComment() )* Declaration() )
( CommentTag() | JspComment() )*
Declaration()
)?
(
LOOKAHEAD( ( CommentTag() | JspComment() )* DoctypeDeclaration() )
( CommentTag() | JspComment() )*
DoctypeDeclaration()
)?
}
/**
* Everything between a start-tag and the corresponding end-tag of an element (if an end tag exists).
*/
void Content() :
{}
{
( Text() | ContentElement() )*
}
/**
* A single (non-text) element that can occur between a start-tag and end-tag of an element.
*
*/
void ContentElement() #void :
{}
{
(
CommentTag()
| Element()
| CData()
| JspComment()
| JspDeclaration()
| JspExpression()
| JspScriptlet()
| JspDirective()
| HtmlScript()
)
}
void JspDirective() :
{ Token t; }
{
<JSP_DIRECTIVE_START>
t = <JSP_DIRECTIVE_NAME> { jjtThis.setName(t.image); }
(
JspDirectiveAttribute()
)*
<JSP_DIRECTIVE_END>
}
void JspDirectiveAttribute() :
{ Token t; }
{
t = <JSP_DIRECTIVE_ATTRIBUTE_NAME> { jjtThis.setName(t.image); }
<JSP_DIRECTIVE_ATTRIBUTE_EQUALS>
t = <JSP_DIRECTIVE_ATTRIBUTE_VALUE> { jjtThis.setValue(quoteContent(t.image)); }
}
void JspScriptlet() :
{ Token t; }
{
<JSP_SCRIPTLET_START>
t = <JSP_SCRIPTLET> { jjtThis.setImage(t.image.trim()); }
<JSP_SCRIPTLET_END>
}
void JspExpression() :
{ Token t; }
{
<JSP_EXPRESSION_START>
t = <JSP_EXPRESSION> { jjtThis.setImage(t.image.trim()); }
<JSP_EXPRESSION_END>
}
void JspDeclaration() :
{ Token t; }
{
<JSP_DECLARATION_START>
t = <JSP_DECLARATION> { jjtThis.setImage(t.image.trim()); }
<JSP_DECLARATION_END>
}
void JspComment() :
{ Token t; }
{
<JSP_COMMENT_START>
t = <JSP_COMMENT_CONTENT> { jjtThis.setImage(t.image.trim()); }
<JSP_COMMENT_END>
}
/**
* This production groups all characters between two tags, where
* tag is an xml-tag "&lt;...&gt;" or a jsp-page-tag "&lt;%...%&gt;" or CDATA "&lt;![CDATA[...]]&gt;".
* Text consists of unparsed text and/or Expression Language expressions.
*/
void Text() :
{
StringBuffer content = new StringBuffer();
String tmp;
}
{
(
tmp = UnparsedText() { content.append(tmp); }
| tmp = ElExpression() { content.append(tmp); }
)+
{jjtThis.setImage(content.toString());}
}
String UnparsedText() :
{ Token t; }
{
t = <UNPARSED_TEXT>
{
jjtThis.setImage(t.image);
return t.image;
}
}
String UnparsedTextNoWhitespace() #UnparsedText :
{ Token t;}
{
(
t = <UNPARSED_TEXT_NO_WHITESPACE>
)
{
jjtThis.setImage(t.image);
return t.image;
}
}
/**
* Text that contains no single quotes, and that does not contain the start
* of a EL expression or value binding.
*/
String UnparsedTextNoSingleQuotes() #UnparsedText :
{ Token t; }
{
t = <UNPARSED_TEXT_NO_SINGLE_QUOTES>
{
jjtThis.setImage(t.image);
return t.image;
}
}
/**
* Text that contains no double quotes, and that does not contain the start
* of a EL expression or value binding.
*/
String UnparsedTextNoDoubleQuotes() #UnparsedText :
{ Token t; }
{
t = <UNPARSED_TEXT_NO_DOUBLE_QUOTES>
{
jjtThis.setImage(t.image);
return t.image;
}
}
/**
* An EL expression, not within an attribute value.
*/
String ElExpression() :
{ Token t; }
{
t = <EL_EXPRESSION>
{
jjtThis.setImage(expressionContent(t.image));
return t.image;
}
}
String ValueBindingInAttribute() #ValueBinding :
{ Token t; }
{
t = <VALUE_BINDING_IN_ATTRIBUTE>
{
jjtThis.setImage(expressionContent(t.image));
return t.image;
}
}
String ElExpressionInAttribute() #ElExpression :
{ Token t; }
{
t = <EL_EXPRESSION_IN_ATTRIBUTE>
{
jjtThis.setImage(expressionContent(t.image));
return t.image;
}
}
void CData() :
{
StringBuffer content = new StringBuffer();
Token t;
}
{
<CDATA_START> ( t = <UNPARSED> { content.append(t.image); } )* <CDATA_END>
{
jjtThis.setImage(content.toString());
}
}
/**
* A XML element, either with a single empty tag, or with a starting and closing tag
* with optional contained content.
*/
void Element() :
{
Token startTag;
Token endTag;
String tagName;
}
{
(
(
<TAG_START>
startTag = <TAG_NAME> { tagName = startTag.image;
jjtThis.setName(tagName);
tagRegister.openTag(jjtThis);
}
)
(Attribute())*
(
(
<TAG_END>{ jjtThis.setEmpty(false);}
(Content())
(<ENDTAG_START>
endTag = <TAG_NAME> {tagRegister.closeTag(endTag.image);}
<TAG_END>)?
)
|
(<TAG_SLASHEND> { jjtThis.setEmpty(true);
jjtThis.setUnclosed(false);
}
)
)
)
}
void Attribute() :
{ Token t; }
{
t = <ATTR_NAME> { jjtThis.setName(t.image); }
(
<ATTR_EQ>
AttributeValue()
)?
}
/**
* The value of an attribute of an element.
* EL expressions, JSF value bindings, and JSP expressions
* are parsed as sub-nodes of the AttributeValue node.
*/
void AttributeValue() :
{
StringBuffer content = new StringBuffer();
String tmp;
Token t = null ;
}
{
(
( <DOUBLE_QUOTE>
( ( tmp = UnparsedTextNoDoubleQuotes()
| tmp = QuoteIndependentAttributeValueContent()
) { content.append(tmp); } )*
( <ENDING_DOUBLE_QUOTE>
| t = <DOLLAR_OR_HASH_DOUBLE_QUOTE> { content.append(t.image.substring(0, 1)); }
)
)
|
( <SINGLE_QUOTE>
( ( tmp = UnparsedTextNoSingleQuotes() | tmp = QuoteIndependentAttributeValueContent() )
{ content.append(tmp); } )*
( <ENDING_SINGLE_QUOTE>
| t = <DOLLAR_OR_HASH_SINGLE_QUOTE> { content.append(t.image.substring(0, 1)); }
)
)
|
( <NO_QUOTE_NO_WHITESPACE>
( ( tmp = UnparsedTextNoWhitespace() | tmp = QuoteIndependentAttributeValueContent() )
{ content.append(tmp); }
)*
( <ENDING_WHITESPACE> )
)
| <IN_ATTR_WHITESPACE>
)
{ jjtThis.setImage( content.toString() );
}
}
/**
* Partial content of an attribute value that can contain all quotes.
* This groups EL expressions, value bindings, and JSP expressions.
*/
String QuoteIndependentAttributeValueContent() #void :
{ String tmp; }
{
( tmp = ElExpressionInAttribute()
| tmp = ValueBindingInAttribute()
| tmp = JspExpressionInAttribute()
)
{ return tmp; }
}
String JspExpressionInAttribute() :
{ Token t; }
{
t = <JSP_EXPRESSION_IN_ATTRIBUTE>
{
jjtThis.setImage(t.image.substring(3, t.image.length()-2).trim()); // without <% and %>
return t.image;
}
}
void CommentTag() :
{
StringBuffer content = new StringBuffer();
Token t;
}
{
<COMMENT_START>
( t = <COMMENT_TEXT> { content.append(t.image); } )*
<COMMENT_END>
{
jjtThis.setImage(content.toString().trim());
}
}
void Declaration() :
{ Token t; }
{
<DECL_START>
t = <TAG_NAME> { jjtThis.setName(t.image); }
(Attribute())*
<DECL_END>
}
void DoctypeDeclaration() :
{ Token t; }
{
<DOCTYPE_DECL_START>
<WHITESPACES>
t = <NAME> { jjtThis.setName(t.image); }
(<WHITESPACES>)?
(DoctypeExternalId() (<WHITESPACES>)?)?
<DOCTYPE_DECL_END>
}
void DoctypeExternalId() :
{
Token systemLiteral;
Token pubIdLiteral;
}
{
( <SYSTEM>
<WHITESPACES>
systemLiteral = <QUOTED_LITERAL>
{ jjtThis.setUri(quoteContent(systemLiteral.image)); }
)
|
( <PUBLIC>
<WHITESPACES>
pubIdLiteral = <QUOTED_LITERAL>
{ jjtThis.setPublicId(quoteContent(pubIdLiteral.image)); }
<WHITESPACES>
systemLiteral = <QUOTED_LITERAL>
{ jjtThis.setUri(quoteContent(systemLiteral.image)); }
)
}
void HtmlScript() :
{
StringBuffer content = new StringBuffer();
String tagName;
Token t;
}
{
<HTML_SCRIPT_START> {}
(Attribute() )* {}
(
(
<TAG_END> {token_source.SwitchTo(HtmlScriptContentState);}
(t = <HTML_SCRIPT_CONTENT> { content.append(t.image); })*
<HTML_SCRIPT_END_TAG> { jjtThis.setImage(content.toString().trim());}
)
|
(
<TAG_SLASHEND>
)
)
}
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