| /* ==================================================================== |
| 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.hslf.record; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.Arrays; |
| import java.util.Map; |
| import java.util.function.Supplier; |
| |
| import org.apache.poi.ddf.DefaultEscherRecordFactory; |
| import org.apache.poi.ddf.EscherContainerRecord; |
| import org.apache.poi.ddf.EscherDggRecord; |
| import org.apache.poi.ddf.EscherRecord; |
| import org.apache.poi.util.GenericRecordUtil; |
| import org.apache.poi.util.IOUtils; |
| import org.apache.poi.util.LittleEndian; |
| |
| /** |
| * Container records which always exists inside Document. |
| * It always acts as a holder for escher DGG container |
| * which may contain which Escher BStore container information |
| * about pictures containes in the presentation (if any). |
| */ |
| public final class PPDrawingGroup extends RecordAtom { |
| |
| //arbitrarily selected; may need to increase |
| private static final int MAX_RECORD_LENGTH = 10_485_760; |
| |
| |
| private byte[] _header; |
| private EscherContainerRecord dggContainer; |
| //cached dgg |
| private EscherDggRecord dgg; |
| |
| protected PPDrawingGroup(byte[] source, int start, int len) { |
| // Get the header |
| _header = Arrays.copyOfRange(source, start, start+8); |
| |
| // Get the contents for now |
| byte[] contents = IOUtils.safelyClone(source, start, len, MAX_RECORD_LENGTH); |
| |
| DefaultEscherRecordFactory erf = new HSLFEscherRecordFactory(); |
| EscherRecord child = erf.createRecord(contents, 0); |
| child.fillFields( contents, 0, erf ); |
| dggContainer = (EscherContainerRecord)child.getChild(0); |
| } |
| |
| /** |
| * We are type 1035 |
| */ |
| public long getRecordType() { |
| return RecordTypes.PPDrawingGroup.typeID; |
| } |
| |
| /** |
| * We're pretending to be an atom, so return null |
| */ |
| public org.apache.poi.hslf.record.Record[] getChildRecords() { |
| return null; |
| } |
| |
| public void writeOut(OutputStream out) throws IOException { |
| ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
| for (EscherRecord r : dggContainer) { |
| if (r.getRecordId() == EscherContainerRecord.BSTORE_CONTAINER){ |
| EscherContainerRecord bstore = (EscherContainerRecord)r; |
| |
| ByteArrayOutputStream b2 = new ByteArrayOutputStream(); |
| for (EscherRecord br : bstore) { |
| byte[] b = new byte[36+8]; |
| br.serialize(0, b); |
| b2.write(b); |
| } |
| byte[] bstorehead = new byte[8]; |
| LittleEndian.putShort(bstorehead, 0, bstore.getOptions()); |
| LittleEndian.putShort(bstorehead, 2, bstore.getRecordId()); |
| LittleEndian.putInt(bstorehead, 4, b2.size()); |
| bout.write(bstorehead); |
| bout.write(b2.toByteArray()); |
| |
| } else { |
| bout.write(r.serialize()); |
| } |
| } |
| int size = bout.size(); |
| |
| // Update the size (header bytes 5-8) |
| LittleEndian.putInt(_header,4,size+8); |
| |
| // Write out our header |
| out.write(_header); |
| |
| byte[] dgghead = new byte[8]; |
| LittleEndian.putShort(dgghead, 0, dggContainer.getOptions()); |
| LittleEndian.putShort(dgghead, 2, dggContainer.getRecordId()); |
| LittleEndian.putInt(dgghead, 4, size); |
| out.write(dgghead); |
| |
| // Finally, write out the children |
| out.write(bout.toByteArray()); |
| |
| } |
| |
| public EscherContainerRecord getDggContainer(){ |
| return dggContainer; |
| } |
| |
| public EscherDggRecord getEscherDggRecord(){ |
| if(dgg == null){ |
| for(EscherRecord r : dggContainer){ |
| if(r instanceof EscherDggRecord){ |
| dgg = (EscherDggRecord)r; |
| break; |
| } |
| } |
| } |
| return dgg; |
| } |
| |
| @Override |
| public Map<String, Supplier<?>> getGenericProperties() { |
| return GenericRecordUtil.getGenericProperties( |
| "dggContainer", this::getDggContainer |
| ); |
| } |
| } |