xmlTools.cpp

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//==============================================
//  copyright            : (C) 2003 by Will Stokes
//==============================================
//  This program is free software; you can redistribute it 
//  and/or modify it under the terms of the GNU General 
//  Public License as published by the Free Software 
//  Foundation; either version 2 of the License, or  
//  (at your option) any later version.         
//
//  As a special exception, Will Stokes gives permission to 
//  link this program with Qt non-commercial edition, and 
//  distribute the resulting executable, without including the 
//  source code for the Qt non-commercial edition in the 
//  source distribution. 
//==============================================

//Systemwide includes
#include <qstring.h>
#include <qdir.h>

#include <string>
#include <libxml/xmlmemory.h>
#include <libxml/debugXML.h>
#include <libxml/HTMLtree.h>
#include <libxml/xmlIO.h>
#include <libxml/DOCBparser.h>
#include <libxml/xinclude.h>
#include <libxml/catalog.h>
#include <libxslt/xslt.h>
#include <libxslt/xsltInternals.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
#include <stdio.h>

//Projectwide includes
#include "xmlTools.h"
#include "../config.h"

//==============================================
QString fixXMLString( QString text )
{
  //the following checks are necessary before exporting
  //strings to XML. see http://hdf.ncsa.uiuc.edu/HDF5/XML/xml_escape_chars.html for details
  text.replace("&", "&amp;");
  text.replace("\"","&quot;");
  text.replace("'", "&apos;");
  text.replace("<", "&lt;");
  text.replace(">", "&gt;");
  return text;
}
//==============================================
void transformXMLtoHTML( QString outputPath, 
                                       QString theme)
{
  xmlSubstituteEntitiesDefault(1);
  xmlLoadExtDtdDefaultValue = 1;
  xsltStylesheetPtr cur = xsltParseStylesheetFile( (const xmlChar *) QString(THEMES_PATH + theme + "/theme.xsl").ascii() );
  xmlDocPtr doc = xmlParseFile( QString(outputPath + "/Album.xml").ascii() );
  const char* params[3];
  params[0] = "outputPath";
  QString quotedPath = outputPath;
  params[1] = quotedPath.prepend('\"').append('\"').ascii();
  params[2] = NULL;
  xmlDocPtr res = xsltApplyStylesheet( cur, doc, params);
  xsltFreeStylesheet( cur );
  xmlFreeDoc( res );
  xmlFreeDoc( doc );
  xsltCleanupGlobals();
  xmlCleanupParser();
}
//==============================================
void updateXML( QString inputPath )
{
  xmlSubstituteEntitiesDefault(1);
  xmlLoadExtDtdDefaultValue = 1;
  
  xsltStylesheetPtr stylesheet;
  xmlDocPtr inputDoc, outputDoc;
  
  stylesheet = xsltParseStylesheetFile( (const xmlChar *) QString(XMLCONVERSION_PATH + "update.xsl").ascii() );
  
  inputDoc = xmlParseFile( QString(inputPath + "/Album.xml").ascii() );
  
  const char* params[3];
  params[0] = "outputPath";
  QString quotedPath = inputPath;
  params[1] = quotedPath.prepend('\"').append('\"').ascii();
  params[2] = NULL;

  //iterate until Album.updated file is created
  QDir workingDir( inputPath );
  
  int iterations = 0;
  while(true)
  {
    iterations++;
    
    //apply the stylesheet
    outputDoc = xsltApplyStylesheet( stylesheet, inputDoc, params );

    //if Album.updated file now exists we have already completed the last iteration, 
    //meaning the input document is the most up-to-date so break out of loop
    if(workingDir.exists( "Album.updated" ))
      break;
        
    //free input  doc
    xmlFreeDoc( inputDoc );
   
    //swap input and output
    inputDoc = outputDoc;   
  }
  
  //remove updated file
  workingDir.remove( "Album.updated" );

  //if we made more than one iteration then changes were applied
  if(iterations > 1)
  {
    //output updated xml file
    FILE* outfile = fopen( QString(inputPath + "/Album.xml").ascii(), "w" );
    xsltSaveResultToFile( outfile, inputDoc, stylesheet);
    fclose( outfile );
  }
  
  //memory
  xsltFreeStylesheet( stylesheet );
  xmlFreeDoc( inputDoc );
  xmlFreeDoc( outputDoc );
  xsltCleanupGlobals();
  xmlCleanupParser();
}
//==============================================

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