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 <wtf/Forward.h>
  29 #include <wtf/Noncopyable.h>
  30 #include <wtf/OwnPtr.h>
  31 #include <wtf/RefPtr.h>
  32 #include "nodes.h"
  33
  34 namespace KJS {
  35
  36     class FunctionBodyNode;
  37     class ProgramNode;
  38     class UString;
  39
  40     struct UChar;
  41
  42     template <typename T> struct ParserRefCountedData : ParserRefCounted {
  43         T data;
  44     };
  45
  46     class Parser : Noncopyable {
  47     public:
  48         template <class ParsedNode>
  49         PassRefPtr<ParsedNode> parse(const UString& sourceURL, int startingLineNumber,
  50             const UChar* code, unsigned length,
  51             int* sourceId = 0, int* errLine = 0, UString* errMsg = 0);
  52
  53         UString sourceURL() const { return m_sourceURL; }
  54         int sourceId() const { return m_sourceId; }
  55
  56         void didFinishParsing(SourceElements*, ParserRefCountedData<DeclarationStacks::VarStack>*,
  57                               ParserRefCountedData<DeclarationStacks::FunctionStack>*, int lastLine);
  58
  59     private:
  60         friend Parser& parser();
  61
  62         Parser(); // Use parser() instead.
  63         void parse(int startingLineNumber, const UChar* code, unsigned length,
  64             int* sourceId, int* errLine, UString* errMsg);
  65
  66         UString m_sourceURL;
  67         int m_sourceId;
  68         RefPtr<SourceElements> m_sourceElements;
  69         RefPtr<ParserRefCountedData<DeclarationStacks::VarStack> > m_varDeclarations;
  70         RefPtr<ParserRefCountedData<DeclarationStacks::FunctionStack> > m_funcDeclarations;
  71         int m_lastLine;
  72     };
  73
  74     Parser& parser(); // Returns the singleton JavaScript parser.
  75
  76     template <class ParsedNode>
  77     PassRefPtr<ParsedNode> Parser::parse(const UString& sourceURL, int startingLineNumber,
  78         const UChar* code, unsigned length,
  79         int* sourceId, int* errLine, UString* errMsg)
  80     {
  81         m_sourceURL = sourceURL;
  82         parse(startingLineNumber, code, length, sourceId, errLine, errMsg);
  83         if (!m_sourceElements) {
  84             m_sourceURL = UString();
  85             return 0;
  86         }
  87         RefPtr<ParsedNode> node = ParsedNode::create(m_sourceElements.release().get(),
  88                                                      m_varDeclarations ? &m_varDeclarations->data : 0,
  89                                                      m_funcDeclarations ? &m_funcDeclarations->data : 0);
  90         m_varDeclarations = 0;
  91         m_funcDeclarations = 0;
  92         m_sourceURL = UString();
  93         node->setLoc(startingLineNumber, m_lastLine);
  94         return node.release();
  95     }
  96
  97 } // namespace KJS
  98
  99 #endif // Parser_h