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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 ***** */
#ifndef __NSXFORMSXPATHSCANNER_H__
#define __NSXFORMSXPATHSCANNER_H__
#include "nsString.h"
/**
* The XPath Expression scanner, used by nsXFormsXPathParser.
*
* @note Should be reimplemented and moved to Transformiix
*
*/
class nsXFormsXPathScanner
{
public:
enum XPATHTOKEN {
LPARAN, RPARAN, LBRACK, RBRACK, AT, COMMA,
COLONCOLON, DOT, DOTDOT, SLASH, SLASHSLASH, UNION,
PLUS, MINUS, EQUAL, NOTEQUAL, LEQUAL, LESS, GEQUAL,
GREATER, MULTIPLYOPERATOR, WHITESPACE, NUMBER,
LITERAL, AND, OR, MOD, DIV, NODE, PI, TEXT, COMMENT,
FUNCTIONNAME, NCNAME, QNAME, VARIABLE, STAR, ANCESTOR,
ANCESTOR_OR_SELF, ATTRIBUTE, CHILD, DESCENDANT,
DESCENDANT_OR_SELF, FOLLOWING, FOLLOWING_SIBLING, NAMESPACE,
PARENT, PRECEDING, PRECEDING_SIBLING, SELF, XPATHEOF, ERRORXPATHTOKEN, NONE
};
private:
XPATHTOKEN mState, mLast;
nsAutoString mExpression;
PRInt32 mOffset, mLength, mSize;
PRUnichar PopChar();
PRUnichar PeekChar();
PRUnichar PeekChar(PRInt32 offset);
PRUnichar NextNonWhite();
PRInt32 GetOffsetForNonWhite();
PRBool SolveDiambiguate();
XPATHTOKEN SolveStar();
XPATHTOKEN ScanNumber();
XPATHTOKEN ScanVariable();
XPATHTOKEN ScanWhitespace();
XPATHTOKEN ScanLiteral();
XPATHTOKEN ScanQName();
XPATHTOKEN ScanNCName();
public:
nsXFormsXPathScanner();
nsXFormsXPathScanner(const nsAString& aExpression);
~nsXFormsXPathScanner();
void Init(const nsAString& aExpression);
XPATHTOKEN NextToken();
PRInt32 Offset();
PRInt32 Length();
void Image(PRInt32& aOffset, PRInt32& aLength);
PRBool HasMoreTokens();
nsAString& Expression();
};
#endif
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