| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==================================================================== */ |
| |
| package org.apache.poi.hssf.record; |
| |
| import org.apache.poi.ddf.EscherRecord; |
| import org.apache.poi.ddf.NullEscherSerializationListener; |
| import org.apache.poi.util.LittleEndian; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| |
| public final class DrawingGroupRecord extends AbstractEscherHolderRecord { |
| public static final short sid = 0xEB; |
| |
| static final int MAX_RECORD_SIZE = 8228; |
| private static final int MAX_DATA_SIZE = MAX_RECORD_SIZE - 4; |
| |
| public DrawingGroupRecord() |
| { |
| } |
| |
| public DrawingGroupRecord( RecordInputStream in ) |
| { |
| super( in ); |
| } |
| |
| protected String getRecordName() |
| { |
| return "MSODRAWINGGROUP"; |
| } |
| |
| public short getSid() |
| { |
| return sid; |
| } |
| |
| public int serialize(int offset, byte[] data) |
| { |
| byte[] rawData = getRawData(); |
| if (getEscherRecords().size() == 0 && rawData != null) |
| { |
| return writeData( offset, data, rawData ); |
| } |
| byte[] buffer = new byte[getRawDataSize()]; |
| int pos = 0; |
| for ( Iterator<EscherRecord> iterator = getEscherRecords().iterator(); iterator.hasNext(); ) |
| { |
| EscherRecord r = iterator.next(); |
| pos += r.serialize(pos, buffer, new NullEscherSerializationListener() ); |
| } |
| |
| return writeData( offset, data, buffer ); |
| } |
| |
| /** |
| * Process the bytes into escher records. |
| * (Not done by default in case we break things, |
| * unless you set the "poi.deserialize.escher" |
| * system property) |
| */ |
| public void processChildRecords() { |
| convertRawBytesToEscherRecords(); |
| } |
| |
| public int getRecordSize() { |
| // TODO - convert this to a RecordAggregate |
| return grossSizeFromDataSize(getRawDataSize()); |
| } |
| |
| private int getRawDataSize() { |
| List<EscherRecord> escherRecords = getEscherRecords(); |
| byte[] rawData = getRawData(); |
| if (escherRecords.size() == 0 && rawData != null) |
| { |
| return rawData.length; |
| } |
| int size = 0; |
| for ( Iterator<EscherRecord> iterator = escherRecords.iterator(); iterator.hasNext(); ) |
| { |
| EscherRecord r = iterator.next(); |
| size += r.getRecordSize(); |
| } |
| return size; |
| } |
| |
| static int grossSizeFromDataSize(int dataSize) |
| { |
| return dataSize + ( (dataSize - 1) / MAX_DATA_SIZE + 1 ) * 4; |
| } |
| |
| private int writeData( int offset, byte[] data, byte[] rawData ) |
| { |
| int writtenActualData = 0; |
| int writtenRawData = 0; |
| while (writtenRawData < rawData.length) |
| { |
| int segmentLength = Math.min( rawData.length - writtenRawData, MAX_DATA_SIZE); |
| if (writtenRawData / MAX_DATA_SIZE >= 2) |
| writeContinueHeader( data, offset, segmentLength ); |
| else |
| writeHeader( data, offset, segmentLength ); |
| writtenActualData += 4; |
| offset += 4; |
| System.arraycopy( rawData, writtenRawData, data, offset, segmentLength ); |
| offset += segmentLength; |
| writtenRawData += segmentLength; |
| writtenActualData += segmentLength; |
| } |
| return writtenActualData; |
| } |
| |
| private void writeHeader( byte[] data, int offset, int sizeExcludingHeader ) |
| { |
| LittleEndian.putShort(data, 0 + offset, getSid()); |
| LittleEndian.putShort(data, 2 + offset, (short) sizeExcludingHeader); |
| } |
| |
| private void writeContinueHeader( byte[] data, int offset, int sizeExcludingHeader ) |
| { |
| LittleEndian.putShort(data, 0 + offset, ContinueRecord.sid); |
| LittleEndian.putShort(data, 2 + offset, (short) sizeExcludingHeader); |
| } |
| } |