File indexing completed on 2024-04-28 11:39:39

 /*
  * This file is part of the DOM implementation for KDE.
  *
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef _XML_Tokenizer_h_
 #define _XML_Tokenizer_h_
 
 #include <qxml.h>
 #include <QStack>
 #include <QLinkedList>
 #include <QMap>
 #include <QObject>
 #include "misc/loader_client.h"
 #include "misc/stringit.h"
 
 class KHTMLView;
 
 namespace khtml
 {
 class CachedObject;
 class CachedScript;
 }
 
 namespace DOM
 {
 class DocumentImpl;
 class NodeImpl;
 class HTMLScriptElementImpl;
 class DocumentImpl;
 class HTMLScriptElementImpl;
 }
 
 namespace khtml
 {
 
 class XMLHandler : public QXmlDefaultHandler
 {
 public:
     XMLHandler(DOM::DocumentImpl *_doc, KHTMLView *_view);
     virtual ~XMLHandler();
 
     // return the error protocol if parsing failed
     QString errorProtocol();
 
     // overloaded handler functions
     bool startDocument() override;
     bool startElement(const QString &namespaceURI, const QString &localName, const QString &qName, const QXmlAttributes &atts) override;
     bool endElement(const QString &namespaceURI, const QString &localName, const QString &qName) override;
     bool startCDATA() override;
     bool endCDATA() override;
     bool characters(const QString &ch) override;
     bool comment(const QString &ch) override;
     bool processingInstruction(const QString &target, const QString &data) override;
     bool startDTD(const QString &name, const QString &publicId, const QString &systemId) override;
     bool endDTD() override;
 
     // namespace handling, to workaround problem in QXML where some attributes
     // do not get the namespace resolved properly
     bool startPrefixMapping(const QString &prefix, const QString &uri) override;
     bool endPrefixMapping(const QString &prefix) override;
     void fixUpNSURI(QString &uri, const QString &qname);
     QMap<QString, QStack<QString> > namespaceInfo;
 
     // from QXmlDeclHandler
     bool attributeDecl(const QString &eName, const QString &aName, const QString &type, const QString &valueDefault, const QString &value) override;
     bool externalEntityDecl(const QString &name, const QString &publicId, const QString &systemId) override;
     bool internalEntityDecl(const QString &name, const QString &value) override;
 
     // from QXmlDTDHandler
     bool notationDecl(const QString &name, const QString &publicId, const QString &systemId) override;
     bool unparsedEntityDecl(const QString &name, const QString &publicId, const QString &systemId, const QString &notationName) override;
 
     bool enterText();
     void exitText();
 
     QString errorString() const override;
 
     bool fatalError(const QXmlParseException &exception) override;
 
     int errorLine;
     int errorCol;
 
 private:
     void pushNode(DOM::NodeImpl *node);
     DOM::NodeImpl *popNode();
     DOM::NodeImpl *currentNode() const;
 private:
     QString errorProt;
     DOM::DocumentImpl *m_doc;
     KHTMLView *m_view;
     QStack<DOM::NodeImpl *> m_nodes;
     DOM::NodeImpl *m_rootNode;
 
     enum State {
         StateInit,
         StateDocument,
         StateQuote,
         StateLine,
         StateHeading,
         StateP
     };
     State state;
 };
 
 class Tokenizer : public QObject
 {
     Q_OBJECT
 public:
     virtual void begin() = 0;
     // script output must be prepended, while new data
     // received during executing a script must be appended, hence the
     // extra bool to be able to distinguish between both cases. document.write()
     // always uses false, while khtmlpart uses true
     virtual void write(const TokenizerString &str, bool appendData) = 0;
     virtual void end() = 0;
     virtual void finish() = 0;
     virtual void setOnHold(bool /*_onHold*/) {}
     virtual bool isWaitingForScripts() const = 0;
     virtual bool isExecutingScript() const = 0;
     virtual void setNormalYieldDelay() {}
     virtual void abort() {}
 
     virtual void executeScriptsWaitingForStylesheets() = 0;
 
 Q_SIGNALS:
     void finishedParsing();
 
 };
 
 class XMLIncrementalSource : public QXmlInputSource
 {
 public:
     XMLIncrementalSource();
     void fetchData() override;
     QChar next() override;
     void setData(const QString &str) override;
     void setData(const QByteArray &data) override;
     QString data() const override;
 
     void appendXML(const QString &str);
     void setFinished(bool);
 
     inline void setPaused(bool paused = true)
     {
         m_paused = paused;
     }
 
 private:
     QString      m_data;
     int          m_pos;
     const QChar *m_unicode;
     bool         m_finished;
     bool         m_paused; // if waiting for scripts
 };
 
 class XMLTokenizer : public Tokenizer, public khtml::CachedObjectClient
 {
 public:
     XMLTokenizer(DOM::DocumentImpl *, KHTMLView * = nullptr);
     virtual ~XMLTokenizer();
     void begin() override;
     void write(const TokenizerString &str, bool) override;
     void end() override;
     void finish() override;
 
     // from CachedObjectClient
     void notifyFinished(khtml::CachedObject *finishedObj) override;
 
     void executeScriptsWaitingForStylesheets() override {}
 
     bool isWaitingForScripts() const override;
     bool isExecutingScript() const override
     {
         return m_executingScript;
     }
 
     // execute script in place, if it contains src attribute we stop parsing till it's downloaded
     void executeScript(DOM::NodeImpl *n);
 
 protected:
     DOM::DocumentImpl *m_doc;
     KHTMLView *m_view;
 
     khtml::CachedScript *m_cachedScript;
 
     QString m_bufferedData;
 
     XMLHandler m_handler;
     QXmlSimpleReader m_reader;
     XMLIncrementalSource m_source;
     bool m_noErrors;
     bool m_executingScript;
     bool m_explicitFinishParsingNeeded;
     bool m_insideWrite;
 };
 
 } // end namespace
 
 #endif