1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 #ifndef _LAYCACHE_HXX 24 #define _LAYCACHE_HXX 25 26 #include <tools/solar.h> 27 28 class SwDoc; 29 class SwLayCacheImpl; 30 class SvStream; 31 32 /************************************************************************* 33 * class SwLayoutCache 34 * 35 * This class allows to save layout information in the file and it contains 36 * this information after loading of a file. 37 * Call Write(..) with a stream and the document to save and the page break 38 * information of the document will be written. 39 * Call Read(..) with a stream and the member pLayCacheImpl will 40 * read the information from the stream and store it in an internal structur. 41 * There's a simple locking mechanism at these classes, 42 * if somebody reads the information, he increments the lock count by 1, 43 * during the Read(..) function the lock count will set to $8000. 44 * 45 **************************************************************************/ 46 47 class SwLayoutCache 48 { 49 SwLayCacheImpl *pImpl; 50 sal_uInt16 nLockCount; 51 public: SwLayoutCache()52 SwLayoutCache() : pImpl( NULL ), nLockCount( 0 ) {} 53 ~SwLayoutCache(); 54 55 void Read( SvStream &rStream ); 56 void Write( SvStream &rStream, const SwDoc& rDoc ); 57 58 void ClearImpl(); IsLocked() const59 sal_Bool IsLocked() const { return nLockCount > 0; } GetLockCount()60 sal_uInt16& GetLockCount() { return nLockCount; } LockImpl()61 SwLayCacheImpl *LockImpl() 62 { if( nLockCount & 0x8000 ) return NULL; 63 if ( pImpl ) 64 ++nLockCount; 65 return pImpl; } UnlockImpl()66 void UnlockImpl() { --nLockCount; } 67 68 #ifdef DBG_UTIL 69 sal_Bool CompareLayout( const SwDoc& rDoc ) const; 70 #endif 71 }; 72 73 #endif 74