kaddressbook

kablock.cpp

00001 /*
00002     This file is part of KAddressBook.
00003     Copyright (c) 2003 Tobias Koenig <tokoe@kde.org>
00004 
00005     This program is free software; you can redistribute it and/or modify
00006     it under the terms of the GNU General Public License as published by
00007     the Free Software Foundation; either version 2 of the License, or
00008     (at your option) any later version.
00009 
00010     This program is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00013     GNU General Public License for more details.
00014 
00015     You should have received a copy of the GNU General Public License
00016     along with this program; if not, write to the Free Software
00017     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00018 
00019     As a special exception, permission is given to link this program
00020     with any edition of TQt, and distribute the resulting executable,
00021     without including the source code for TQt in the source distribution.
00022 */
00023 
00024 #include <kabc/addressbook.h>
00025 #include <kabc/resource.h>
00026 #include <klocale.h>
00027 #include <kmessagebox.h>
00028 #include <kstaticdeleter.h>
00029 
00030 #include "kablock.h"
00031 
00032 class AddressBookWrapper : public KABC::AddressBook
00033 {
00034   public:
00035     AddressBookWrapper( KABC::AddressBook* );
00036 
00037     KABC::Resource* getStandardResource()
00038     {
00039       return standardResource();
00040     }
00041 };
00042 
00043 KABLock *KABLock::mSelf = 0;
00044 
00045 static KStaticDeleter<KABLock> kabLockDeleter;
00046 
00047 KABLock::KABLock( KABC::AddressBook *ab )
00048   : mAddressBook( ab )
00049 {
00050 }
00051 
00052 KABLock::~KABLock()
00053 {
00054 }
00055 
00056 KABLock *KABLock::self( KABC::AddressBook *ab )
00057 {
00058   if ( !mSelf )
00059     kabLockDeleter.setObject( mSelf, new KABLock( ab ) );
00060   else
00061     mSelf->mAddressBook = ab;
00062 
00063   return mSelf;
00064 }
00065 
00066 bool KABLock::lock( KABC::Resource *resource )
00067 {
00068   if ( mLocks.find( resource ) == mLocks.end() ) { // not locked yet
00069     KABC::Ticket *ticket = mAddressBook->requestSaveTicket( resource );
00070     if ( !ticket ) {
00071       return false;
00072     } else {
00073       LockEntry entry;
00074       entry.ticket = ticket;
00075       entry.counter = 1;
00076       mLocks.insert( resource, entry );
00077     }
00078   } else {
00079     LockEntry &entry = mLocks[ resource ];
00080     entry.counter++;
00081   }
00082 
00083   return true;
00084 }
00085 
00086 bool KABLock::unlock( KABC::Resource *resource )
00087 {
00088   AddressBookWrapper *wrapper = static_cast<AddressBookWrapper*>( mAddressBook );
00089   if ( resource == 0 )
00090     resource = wrapper->getStandardResource();
00091 
00092   if ( mLocks.find( resource ) == mLocks.end() ) { // hmm, not good...
00093     return false;
00094   } else {
00095     LockEntry &entry = mLocks[ resource ];
00096     entry.counter--;
00097 
00098     if ( entry.counter == 0 ) {
00099       mAddressBook->save( entry.ticket );
00100 //      # Activate in KDE 4.0
00101 //      mAddressBook->releaseSaveTicket( entry.ticket );
00102 
00103       mLocks.remove( resource );
00104     }
00105   }
00106 
00107   return true;
00108 }