123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126 |
- /* ====================================================================
- 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.IOException;
- import java.io.OutputStream;
- import java.util.Map;
- import java.util.function.Supplier;
-
- import org.apache.poi.util.GenericRecordJsonWriter;
- import org.apache.poi.util.GenericRecordUtil;
- import org.apache.poi.util.IOUtils;
- import org.apache.poi.util.LittleEndian;
- import org.apache.poi.util.StringUtil;
-
- /**
- * A TextBytesAtom (type 4008). Holds text in ascii form (unknown
- * code page, for now assumed to be the default of
- * org.apache.poi.util.StringUtil, which is the Excel default).
- * The trailing return character is always stripped from this
- */
-
- public final class TextBytesAtom extends RecordAtom {
- public static final long _type = RecordTypes.TextBytesAtom.typeID;
- //arbitrarily selected; may need to increase
- private static final int MAX_RECORD_LENGTH = 1_000_000;
-
- private byte[] _header;
-
- /** The bytes that make up the text */
- private byte[] _text;
-
- /** Grabs the text. Uses the default codepage */
- public String getText() {
- return StringUtil.getFromCompressedUnicode(_text,0,_text.length);
- }
-
- /** Updates the text in the Atom. Must be 8 bit ascii */
- public void setText(byte[] b) {
- // Set the text
- _text = b.clone();
-
- // Update the size (header bytes 5-8)
- LittleEndian.putInt(_header,4,_text.length);
- }
-
- /* *************** record code follows ********************** */
-
- /**
- * For the TextBytes Atom
- */
- protected TextBytesAtom(byte[] source, int start, int len) {
- // Sanity Checking
- if(len < 8) { len = 8; }
-
- // Get the header
- _header = new byte[8];
- System.arraycopy(source,start,_header,0,8);
-
- // Grab the text
- _text = IOUtils.safelyAllocate(len-8, MAX_RECORD_LENGTH);
- System.arraycopy(source,start+8,_text,0,len-8);
- }
-
- /**
- * Create an empty TextBytes Atom
- */
- public TextBytesAtom() {
- _header = new byte[8];
- LittleEndian.putUShort(_header, 0, 0);
- LittleEndian.putUShort(_header, 2, (int)_type);
- LittleEndian.putInt(_header, 4, 0);
-
- _text = new byte[]{};
- }
-
- /**
- * We are of type 4008
- */
- @Override
- public long getRecordType() { return _type; }
-
- /**
- * Write the contents of the record back, so it can be written
- * to disk
- */
- @Override
- public void writeOut(OutputStream out) throws IOException {
- // Header - size or type unchanged
- out.write(_header);
-
- // Write out our text
- out.write(_text);
- }
-
- /**
- * dump debug info; use getText() to return a string
- * representation of the atom
- */
- @Override
- public String toString() {
- return GenericRecordJsonWriter.marshal(this);
- }
-
- @Override
- public Map<String, Supplier<?>> getGenericProperties() {
- return GenericRecordUtil.getGenericProperties(
- "text", this::getText
- );
- }
- }
|