WebCore/Tokenizer.h

   1 /*
   2  * This file is part of the DOM implementation for KDE.
   3  *
   4  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
   5  * Copyright (C) 2005, 2006 Apple Computer, Inc.
   6  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
   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 Tokenizer_h
  26 #define Tokenizer_h
  27
  28 namespace WebCore {
  29
  30     class SegmentedString;
  31
  32     class Tokenizer {
  33     public:
  34         virtual ~Tokenizer() { }
  35
  36         // Script output must be prepended, while new data
  37         // received during executing a script must be appended, hence the
  38         // extra bool to be able to distinguish between both cases.
  39         // document.write() always uses false, while the loader uses true.
  40         virtual bool write(const SegmentedString&, bool appendData) = 0;
  41         virtual void finish() = 0;
  42         virtual bool isWaitingForScripts() const = 0;
  43         virtual void stopParsing() { m_parserStopped = true; }
  44         virtual bool processingData() const { return false; }
  45         virtual int executingScript() const { return 0; }
  46
  47         virtual bool wantsRawData() const { return false; }
  48         virtual bool writeRawData(const char* /*data*/, int /*length*/) { return false; }
  49
  50         bool inViewSourceMode() const { return m_inViewSourceMode; }
  51         void setInViewSourceMode(bool mode) { m_inViewSourceMode = mode; }
  52
  53         virtual bool wellFormed() const { return true; }
  54
  55         virtual int lineNumber() const { return -1; }
  56         virtual int columnNumber() const { return -1; }
  57
  58         virtual void executeScriptsWaitingForStylesheets() {}
  59
  60         virtual bool isHTMLTokenizer() const { return false; }
  61
  62         virtual void parsePending() { }
  63
  64     protected:
  65         Tokenizer(bool viewSourceMode = false)
  66             : m_parserStopped(false)
  67             , m_inViewSourceMode(viewSourceMode)
  68         {
  69         }
  70
  71         // The tokenizer has buffers, so parsing may continue even after
  72         // it stops receiving data. We use m_parserStopped to stop the tokenizer
  73         // even when it has buffered data.
  74         bool m_parserStopped;
  75         bool m_inViewSourceMode;
  76     };
  77
  78 } // namespace WebCore
  79
  80 #endif // Tokenizer_h