Back to index

lightning-sunbird  0.9+nobinonly
nsXFormsXPathScanner.h
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla XForms support.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Novell, Inc.
00019  * Portions created by the Initial Developer are Copyright (C) 2004
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *  Allan Beaufour <abeaufour@novell.com>
00024  *  David Landwehr <dlandwehr@novell.com>
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either the GNU General Public License Version 2 or later (the "GPL"), or
00028  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
00031  * under the terms of either the GPL or the LGPL, and not to allow others to
00032  * use your version of this file under the terms of the MPL, indicate your
00033  * decision by deleting the provisions above and replace them with the notice
00034  * and other provisions required by the GPL or the LGPL. If you do not delete
00035  * the provisions above, a recipient may use your version of this file under
00036  * the terms of any one of the MPL, the GPL or the LGPL.
00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #ifndef __NSXFORMSXPATHSCANNER_H__
00041 #define __NSXFORMSXPATHSCANNER_H__
00042 
00043 #include "nsString.h"
00044 
00051 class nsXFormsXPathScanner
00052 {
00053 public:
00054   enum XPATHTOKEN {
00055     LPARAN, RPARAN, LBRACK, RBRACK, AT, COMMA,
00056     COLONCOLON, DOT, DOTDOT, SLASH, SLASHSLASH, UNION,
00057     PLUS, MINUS, EQUAL, NOTEQUAL, LEQUAL, LESS, GEQUAL,
00058     GREATER, MULTIPLYOPERATOR, WHITESPACE, NUMBER,
00059     LITERAL, AND, OR, MOD, DIV, NODE, PI, TEXT, COMMENT,
00060     FUNCTIONNAME, NCNAME, QNAME, VARIABLE, STAR, ANCESTOR,
00061     ANCESTOR_OR_SELF, ATTRIBUTE, CHILD, DESCENDANT,
00062     DESCENDANT_OR_SELF, FOLLOWING, FOLLOWING_SIBLING, NAMESPACE,
00063     PARENT, PRECEDING, PRECEDING_SIBLING, SELF, XPATHEOF, ERRORXPATHTOKEN, NONE
00064   };
00065 
00066 private:
00067   XPATHTOKEN mState, mLast;
00068   nsAutoString mExpression;
00069   PRInt32 mOffset, mLength, mSize;
00070 
00071   PRUnichar PopChar();
00072   PRUnichar PeekChar();
00073   PRUnichar PeekChar(PRInt32 offset);
00074   PRUnichar NextNonWhite();
00075   PRInt32 GetOffsetForNonWhite();
00076 
00077   PRBool SolveDiambiguate();
00078   XPATHTOKEN SolveStar();
00079   XPATHTOKEN ScanNumber();
00080   XPATHTOKEN ScanVariable();
00081   XPATHTOKEN ScanWhitespace();
00082   XPATHTOKEN ScanLiteral();
00083   XPATHTOKEN ScanQName();
00084   XPATHTOKEN ScanNCName();
00085 
00086 
00087 public:
00088   nsXFormsXPathScanner();
00089   nsXFormsXPathScanner(const nsAString& aExpression);
00090   ~nsXFormsXPathScanner();
00091 
00092   void Init(const nsAString& aExpression);
00093   XPATHTOKEN NextToken();
00094   PRInt32 Offset();
00095   PRInt32 Length();
00096   void Image(PRInt32& aOffset, PRInt32& aLength);
00097   PRBool HasMoreTokens();
00098   nsAString& Expression();
00099 };
00100 
00101 #endif