add a postscript export overload that takes a QFile*, so we can properly use KTemporaryFile with printing

svn path=/trunk/KDE/kdegraphics/okular/; revision=709582

generators/djvu/generator_djvu.cpp

@@ -207,12 +207,10 @@ bool DjVuGenerator::print( KPrinter& printer )
     tf.setSuffix( ".ps" );
     if ( !tf.open() )
         return false;
-    QString tempfilename = tf.fileName();
-    tf.close();
 
-    if ( m_djvu->exportAsPostScript( tempfilename, pageList ) )
+    if ( m_djvu->exportAsPostScript( &tf, pageList ) )
     {
-        return printer.printFiles( QStringList( tempfilename ), true );
+        return printer.printFiles( QStringList( tf.fileName() ), true );
     }
     return false;
 }

generators/djvu/kdjvu.cpp

@@ -897,11 +897,25 @@ bool KDjVu::exportAsPostScript( const QString & fileName, const QList<int>& page
     if ( !d->m_djvu_document || fileName.trimmed().isEmpty() || pageList.isEmpty() )
         return false;
 
-    QByteArray fn = QFile::encodeName( fileName );
-    FILE* f = fopen( fn.constData(), "w+" );
+    QFile f( fileName );
+    f.open( QIODevice::ReadWrite );
+    bool ret = exportAsPostScript( &f, pageList );
+    if ( ret )
+    {
+        f.close();
+    }
+    return ret;
+}
+
+bool KDjVu::exportAsPostScript( QFile* file, const QList<int>& pageList ) const
+{
+    if ( !d->m_djvu_document || !file || pageList.isEmpty() )
+        return false;
+
+    FILE* f = fdopen( file->handle(), "w+" );
     if ( !f )
     {
-        kDebug() << "KDjVu::exportAsPostScript(): error while opening the file";
+        kDebug() << "error while getting the FILE*";
         return false;
     }
 

generators/djvu/kdjvu.h

@@ -20,6 +20,7 @@
 #include <qvector.h>
 
 class QDomDocument;
+class QFile;
 
 /**
  * @brief Qt (KDE) encapsulation of the DjVuLibre
@@ -258,6 +259,12 @@ class KDjVu : public QObject
           */
         bool exportAsPostScript( const QString & fileName, const QList<int>& pageList ) const;
 
+        /**
+         * Export the currently open document as PostScript file.
+         * \returns whether the exporting was successful
+          */
+        bool exportAsPostScript( QFile* file, const QList<int>& pageList ) const;
+
         /**
          * Return the list of the text entities for the specified \p page, that matches the
          * specified \p granularity.