1 files changed, 157 insertions, 0 deletions
diff --git a/kmail/undostack.cpp b/kmail/undostack.cpp
new file mode 100644
index 00000000..f1729f3a
--- /dev/null
+++ b/kmail/undostack.cpp
@@ -0,0 +1,157 @@
+/*
+    This file is part of KMail
+
+    Copyright (C) 1999 Waldo Bastian (bastian@kde.org)
+    Copyright (c) 2003 Zack Rusin <zack@kde.org>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    version 2 as published by the Free Software Foundation.
+
+    This software 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 library; see the file COPYING. If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "undostack.h"
+
+#include "kmmainwin.h"
+#include "kmfolder.h"
+#include "kmmsgdict.h"
+
+#include <kmessagebox.h>
+#include <klocale.h>
+#include <kdebug.h>
+
+namespace KMail {
+
+UndoStack::UndoStack(int size)
+  : QObject(0, "undostack"), mSize(size), mLastId(0),
+    mCachedInfo(0)
+{
+   mStack.setAutoDelete(true);
+}
+
+void UndoStack::clear()
+{
+   mStack.clear();
+}
+
+int UndoStack::newUndoAction( KMFolder *srcFolder, KMFolder *destFolder )
+{
+  UndoInfo *info = new UndoInfo;
+  info->id         = ++mLastId;
+  info->srcFolder  = srcFolder;
+  info->destFolder = destFolder;
+  if ((int) mStack.count() == mSize)
+    mStack.removeLast();
+  mStack.prepend( info );
+  emit undoStackChanged();
+  return info->id;
+}
+
+void UndoStack::addMsgToAction( int undoId, ulong serNum )
+{
+  if ( !mCachedInfo || mCachedInfo->id != undoId ) {
+    QPtrListIterator<UndoInfo> itr( mStack );
+    while ( itr.current() ) {
+      if ( itr.current()->id == undoId ) {
+        mCachedInfo = itr.current();
+        break;
+      }
+      ++itr;
+    }
+  }
+
+  Q_ASSERT( mCachedInfo );
+  mCachedInfo->serNums.append( serNum );
+}
+
+void UndoStack::undo()
+{
+  KMMessage *msg;
+  ulong serNum;
+  int idx = -1;
+  KMFolder *curFolder;
+  if ( mStack.count() > 0 )
+  {
+    UndoInfo *info = mStack.take(0);
+    emit undoStackChanged();
+    QValueList<ulong>::iterator itr;
+    KMFolderOpener openDestFolder(info->destFolder, "undodest");
+    for( itr = info->serNums.begin(); itr != info->serNums.end(); ++itr ) {
+      serNum = *itr;
+      KMMsgDict::instance()->getLocation(serNum, &curFolder, &idx);
+      if ( idx == -1 || curFolder != info->destFolder ) {
+        kdDebug(5006)<<"Serious undo error!"<<endl;
+        delete info;
+        return;
+      }
+      msg = curFolder->getMsg( idx );
+      info->srcFolder->moveMsg( msg );
+      if ( info->srcFolder->count() > 1 )
+        info->srcFolder->unGetMsg( info->srcFolder->count() - 1 );
+    }
+    delete info;
+  }
+  else
+  {
+    // Sorry.. stack is empty..
+    KMessageBox::sorry( kmkernel->mainWin(), i18n("There is nothing to undo."));
+  }
+}
+
+void
+UndoStack::pushSingleAction(ulong serNum, KMFolder *folder, KMFolder *destFolder)
+{
+  int id = newUndoAction( folder, destFolder );
+  addMsgToAction( id, serNum );
+}
+
+void
+UndoStack::msgDestroyed( KMMsgBase* /*msg*/)
+{
+  /*
+   for(UndoInfo *info = mStack.first(); info; )
+   {
+      if (info->msgIdMD5 == msg->msgIdMD5())
+      {
+         mStack.removeRef( info );
+         info = mStack.current();
+      }
+      else
+         info = mStack.next();
+   }
+  */
+}
+
+void
+UndoStack::folderDestroyed( KMFolder *folder)
+{
+   for( UndoInfo *info = mStack.first(); info; )
+   {
+      if ( (info->srcFolder == folder) ||
+	   (info->destFolder == folder) )
+      {
+         mStack.removeRef( info );
+         info = mStack.current();
+      }
+      else
+         info = mStack.next();
+   }
+   emit undoStackChanged();
+}
+
+}
+
+#include "undostack.moc"