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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla XForms support.
*
* The Initial Developer of the Original Code is
* Novell, Inc.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Allan Beaufour <abeaufour@novell.com>
* David Landwehr <dlandwehr@novell.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsXFormsXPathScanner.h"
#include "nsXFormsXPathNode.h"
#define ANALYZE_STACK_SIZE 120
/**
* The XPath Expression parser. Uses nsXFormsXPathScanner to scan the expression
* and builds a parse tree of nsXFormsXPathNode's.
*
* @note Should be reimplemented and moved to Transformiix
*
*/
class nsXFormsXPathParser {
private:
nsXFormsXPathScanner mScanner;
nsXFormsXPathScanner::XPATHTOKEN mPeek;
PRBool mUsesDynamicFunc;
nsXFormsXPathNode* mHead;
int mAnalyzeStackPointer;
int mPredicateLevel;
nsXFormsXPathNode* mStack[ANALYZE_STACK_SIZE];
nsXFormsXPathScanner::XPATHTOKEN PeekToken();
nsXFormsXPathScanner::XPATHTOKEN PopToken();
void PushContext(PRInt32 aStartIndex = -100);
void PushContext(nsXFormsXPathNode* mAnalyze);
void EndContext();
void RestartContext();
nsXFormsXPathNode* JustContext();
nsXFormsXPathNode* PopContext();
PRBool DoRelative();
void AbbreviatedStep();
void AbsoluteLocationPath();
void AdditiveExpression();
void AndExpr();
void AxisSpecifier();
void EqualityExpr();
void Expr();
void FilterExpr();
void FunctionCall();
void LocationPath();
void MultiplicationExpr();
void NameTest();
void NodeTest();
void NodeType();
void OrExpr();
void PathExpr();
void Predicate();
PRBool PrimaryExpr();
void RelationalExpression();
void RelativeLocationPath();
void Step();
void UnaryExpr();
void UnionExpr();
#ifdef DEBUG_XF_PARSER
void Dump(nsXFormsXPathNode* aNode);
void DumpWithLevel(nsXFormsXPathNode* aNode, PRInt32 aLevel);
void OutputSubExpression(PRInt32 aOffset, PRInt32 aEndOffset);
#endif
public:
nsXFormsXPathParser();
~nsXFormsXPathParser();
nsXFormsXPathNode* Parse(const nsAString& aExpression);
PRBool UsesDynamicFunc() const;
};
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