CVS commit by cullmann: 

backport fix for #75559


  M +48 -9     katedocument.cpp   1.681.2.5
  M +24 -13    katedocument.h   1.264.2.3


--- kdelibs/kate/part/katedocument.cpp  #1.681.2.4:1.681.2.5
@@ -72,4 +72,5 @@
 #include <kencodingfiledialog.h>
 #include <ktempfile.h>
+#include <kmdcodec.h>
 
 #include <qtimer.h>
@@ -2384,5 +2385,4 @@ bool KateDocument::openFile(KIO::Job * j
     
     }
-        
     // update file type
     updateFileType (KateFactory::self()->fileTypeManager()->fileType (this));
@@ -2390,4 +2390,7 @@ bool KateDocument::openFile(KIO::Job * j
     // read vars
     readVariables();
+
+    // update the md5 digest
+    createDigest( m_digest );
   }
 
@@ -2507,4 +2510,7 @@ bool KateDocument::saveFile()
     success = buffer->saveFile (m_file);
 
+  // update the md5 digest
+  createDigest( m_digest );
+    
   // add file
   activateDirWatch ();
@@ -4003,6 +4009,14 @@ void KateDocument::guiActivateEvent( KPa
 }
 
-void KateDocument::setDocName (QString )
+void KateDocument::setDocName (QString name )
 {
+  if ( !name.isEmpty() )
+  {
+    // TODO check for similarly named documents
+    m_docName = name;
+    emit nameChanged((Kate::Document *) this);
+    return;
+  }
+
   int count = -1;
 
@@ -4813,6 +4827,13 @@ bool KateDocument::checkColorValue( QStr
 void KateDocument::slotModOnHdDirty (const QString &path)
 {
-  if ((path == m_file) && (!m_modOnHd || m_modOnHdReason != 1))
+  if ((path == m_dirWatchFile) && (!m_modOnHd || m_modOnHdReason != 1))
+  {
+    // compare md5 with the one we have (if we have one)
+    if ( ! m_digest.isEmpty() )
   {
+      QCString tmp;
+      if ( createDigest( tmp ) && tmp == m_digest )
+        return;
+    }
     m_modOnHd = true;
     m_modOnHdReason = 1;
@@ -4823,5 +4844,5 @@ void KateDocument::slotModOnHdDirty (con
 void KateDocument::slotModOnHdCreated (const QString &path)
 {
-  if ((path == m_file) && (!m_modOnHd || m_modOnHdReason != 2))
+  if ((path == m_dirWatchFile) && (!m_modOnHd || m_modOnHdReason != 2))
   {
     m_modOnHd = true;
@@ -4833,5 +4854,5 @@ void KateDocument::slotModOnHdCreated (c
 void KateDocument::slotModOnHdDeleted (const QString &path)
 {
-  if ((path == m_file) && (!m_modOnHd || m_modOnHdReason != 3))
+  if ((path == m_dirWatchFile) && (!m_modOnHd || m_modOnHdReason != 3))
   {
     m_modOnHd = true;
@@ -4841,4 +4862,22 @@ void KateDocument::slotModOnHdDeleted (c
 }
 
+bool KateDocument::createDigest( QCString &result )
+{
+  bool ret = false;
+  result = "";
+  if ( url().isLocalFile() )
+  {
+    QFile f ( url().path() );
+    if ( f.open( IO_ReadOnly) )
+    {
+      KMD5 md5;
+      ret = md5.update( f );
+      md5.hexDigest( result );
+      f.close();
+    }
+  }
+  return ret;
+}
+
 bool KateDocument::wrapCursor ()
 {

--- kdelibs/kate/part/katedocument.h  #1.264.2.2:1.264.2.3
@@ -714,4 +714,14 @@ class KateDocument : public Kate::Docume
     void slotModOnHdDeleted (const QString &path);
 
+  private:
+    /**
+     * create a MD5 digest of the file, if it is a local file,
+     * and fill it into the string @p result.
+     * This is using KMD5::hexDigest().
+     *
+     * @return wheather the operation was attempted and succeded.
+     */
+    bool createDigest( QCString &result );
+
   public:
     // should cursor be wrapped ? take config + blockselection state in account
@@ -740,4 +750,5 @@ class KateDocument : public Kate::Docume
     bool m_modOnHd;
     unsigned char m_modOnHdReason;
+    QCString m_digest; // MD5 digest, updated on load/save
 
     QString m_docName;