kjs/Parser.h

   1 // -*- c-basic-offset: 4 -*-
   2 /*
   3  *  This file is part of the KDE libraries
   4  *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
   5  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   6  *  Copyright (C) 2003, 2006, 2007 Apple Inc.
   7  *
   8  *  This library is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU Library General Public
  10  *  License as published by the Free Software Foundation; either
  11  *  version 2 of the License, or (at your option) any later version.
  12  *
  13  *  This library is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  Library General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU Library General Public License
  19  *  along with this library; see the file COPYING.LIB.  If not, write to
  20  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  *  Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #ifndef Parser_h
  26 #define Parser_h
  27
  28 #include "SourceProvider.h"
  29 #include "nodes.h"
  30 #include <wtf/Forward.h>
  31 #include <wtf/Noncopyable.h>
  32 #include <wtf/OwnPtr.h>
  33 #include <wtf/RefPtr.h>
  34
  35 namespace KJS {
  36
  37     class FunctionBodyNode;
  38     class ProgramNode;
  39     class UString;
  40
  41     struct UChar;
  42
  43     template <typename T> struct ParserRefCountedData : ParserRefCounted {
  44         T data;
  45     };
  46
  47     class Parser : Noncopyable {
  48     public:
  49         template <class ParsedNode> PassRefPtr<ParsedNode> parse(PassRefPtr<SourceProvider>, int* errLine = 0, UString* errMsg = 0);
  50         template <class ParsedNode> PassRefPtr<ParsedNode> parse(const SourceCode&, int* errLine = 0, UString* errMsg = 0);
  51
  52         void didFinishParsing(SourceElements*, ParserRefCountedData<DeclarationStacks::VarStack>*,
  53                               ParserRefCountedData<DeclarationStacks::FunctionStack>*, int lastLine);
  54
  55         void reparse(FunctionBodyNode*);
  56
  57     private:
  58         friend Parser& parser();
  59
  60         void parse(int* errLine, UString* errMsg);
  61
  62         const SourceCode* m_source;
  63         RefPtr<SourceElements> m_sourceElements;
  64         RefPtr<ParserRefCountedData<DeclarationStacks::VarStack> > m_varDeclarations;
  65         RefPtr<ParserRefCountedData<DeclarationStacks::FunctionStack> > m_funcDeclarations;
  66         int m_lastLine;
  67     };
  68
  69     Parser& parser(); // Returns the singleton JavaScript parser.
  70
  71     template <class ParsedNode> PassRefPtr<ParsedNode> Parser::parse(const SourceCode& source, int* errLine, UString* errMsg)
  72     {
  73         m_source = &source;
  74         parse(errLine, errMsg);
  75         RefPtr<ParsedNode> result;
  76         if (m_sourceElements) {
  77             result = ParsedNode::create(*m_source,
  78                                         m_sourceElements.get(),
  79                                         m_varDeclarations ? &m_varDeclarations->data : 0,
  80                                         m_funcDeclarations ? &m_funcDeclarations->data : 0);
  81             result->setLoc(m_source->firstLine(), m_lastLine);
  82         }
  83
  84         m_source = 0;
  85         m_sourceElements = 0;
  86         m_varDeclarations = 0;
  87         m_funcDeclarations = 0;
  88         return result.release();
  89     }
  90
  91 } // namespace KJS
  92
  93 #endif // Parser_h