1 files changed, 150 insertions, 0 deletions
diff --git a/kfile-plugins/dvi/kfile_dvi.cpp b/kfile-plugins/dvi/kfile_dvi.cpp
new file mode 100644
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+++ b/kfile-plugins/dvi/kfile_dvi.cpp
@@ -0,0 +1,150 @@
+/* This file is part of the KDE project
+ * Copyright (C) 2002 Matthias Witzgall <witzi@gmx.net>
+ *
+ * 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 version 2.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+/* further informations about the dvi file format could be downloaded from: http://www.rpi.edu/~sofkam/DVI/archive/standards/dvistd0.dvi */
+
+#include "kfile_dvi.h"
+
+#include <kgenericfactory.h>
+#include <kdebug.h>
+#include <klocale.h>
+#include <kfilemetainfo.h>
+
+#include <qstring.h>
+#include <qvariant.h>
+#include <qdatetime.h>
+#include <qfile.h>
+#include <qfileinfo.h>
+#include <qregexp.h>
+
+
+// preprocessormacro K_EXPORT_COMPONENT_FACTORY loads shared library 'kfile_dvi.so' dynamic if necessary
+typedef KGenericFactory<KDviPlugin> DviFactory;
+K_EXPORT_COMPONENT_FACTORY(kfile_dvi, DviFactory("kfile_dvi"))
+
+KDviPlugin::KDviPlugin (QObject * parent, const char * name, const QStringList & preferredItems)
+  : KFilePlugin(parent, name, preferredItems)
+{
+  kdDebug(7034) << "dvi plugin" << endl;
+  
+  // set up our mime type
+  KFileMimeTypeInfo * info = this->addMimeTypeInfo("application/x-dvi");
+  
+  
+  KFileMimeTypeInfo::GroupInfo * group = this->addGroupInfo(info, "General", "General");
+  
+  this->addItemInfo(group, "3_Created", i18n("Created"), QVariant::String);
+  this->addItemInfo(group, "6_Comment", i18n("Comment"), QVariant::String);
+  this->addItemInfo(group, "7_Pages", i18n("Pages"), QVariant::UInt);
+}
+
+bool KDviPlugin::readInfo (KFileMetaInfo & info, uint /* what (unused in this plugin) */)
+{
+  if ( info.path().isEmpty() )
+    return false;
+  KFileMetaInfoGroup GeneralGroup = appendGroup(info, "General");
+  QFile f(info.path());
+  QFileInfo f_info;
+  Q_UINT16 bytes_to_read;
+  Q_UINT8 comment_length;
+  QString comment;
+  Q_UINT16 pages;
+  Q_UINT8 buffer[270]; // buffer for reading data; no data is read with more than 270 bytes
+  Q_UINT32 ptr;
+  int i; // running index
+  
+  // open file and try to get the comment
+  f.open(IO_ReadOnly);
+  
+  if ( f.isOpen() == false ){
+    kdDebug(7034) << "cannot open file" << endl;
+    return false;
+  }
+  
+  f_info.setFile(f); // create fileinfoobject
+  bytes_to_read = QMIN(f_info.size(), 270); // check, if the file size is smaller than 270 bytes
+  // (if the comment is as large as possible, we don't have to
+  // read more than 270 bytes)
+  
+  if ( f.readBlock((char *)buffer, bytes_to_read) != bytes_to_read ){ // cast to (char *) is necessary
+    kdDebug(7034) << "read error (1)" << endl;
+    return false;
+  }
+  
+  if ( (buffer[0] != 247)  ||  (buffer[1] != 2) ){
+    // magic numbers are not right
+    kdDebug(7034) << "wrong file format" << endl;;
+    return false;
+  }
+  
+  comment_length = buffer[14]; // set up length of comment
+  comment.setLength(comment_length); // used to avoid permanent reallocation when extracting the comment from buffer
+  
+  for ( i = 15; i <= 14+comment_length; ++i ) // extract comment from buffer
+    comment[i-15] = (char)buffer[i];
+
+  appendItem(GeneralGroup, "6_Comment", comment.simplifyWhiteSpace() );
+  
+  // comment is ok, now get total number of pages
+  f.at( f.size() - 13);
+  if ( f.readBlock((char *)buffer, 13) != 13 ){
+    kdDebug(7034) << "read error (2)" << endl;
+    return false;
+  }
+  
+  i = 12; // reset running index i
+  while ( buffer[i] == 223 ){ --i; } // skip all trailing bytes
+  
+  if ( (buffer[i] != 2) || (i > 8) || (i < 5) ){
+    kdDebug(7034) << "wrong file formatx" << endl;
+    return false;
+  }
+  
+  // now we know the position of the pointer to the beginning of the postamble and we can read it
+  ptr = buffer[i-4];
+  ptr = (ptr << 8) | buffer[i-3];
+  ptr = (ptr << 8) | buffer[i-2];
+  ptr = (ptr << 8) | buffer[i-1];
+  
+  // bytes for total number of pages have a offset of 27 to the beginning of the postamble
+  f.at(ptr + 27);
+  
+  // now read total number of pages from file
+  if ( f.readBlock((char *)buffer, 2) != 2 ){
+    kdDebug(7034) << "read error (3)" << endl;
+    return false;
+  }
+  pages = buffer[0];
+  pages = (pages << 8) | buffer[1];
+  
+  appendItem(GeneralGroup, "7_Pages", QVariant(pages) );
+  
+  f.close();
+  
+  // now get and set up some basic informations about the file (same informations would be displayed, if there is no dvi-plugin)
+  appendItem(GeneralGroup, "1_Type", QVariant( i18n("TeX Device Independent file") ) ); // set up type of file
+  
+  appendItem(GeneralGroup, "4_Modified", QVariant(f_info.lastModified().toString("yyyy-MM-dd hh:mm")) );
+  // ISO 8601 date format (without seconds)
+  
+  return true;
+}
+
+#include "kfile_dvi.moc"