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- /* ====================================================================
- 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.ArrayList;
- import java.util.List;
-
- import org.apache.poi.hslf.exceptions.HSLFException;
- import org.apache.poi.hslf.model.textproperties.TextPropCollection;
- import org.apache.poi.hslf.model.textproperties.TextPropCollection.TextPropType;
- import org.apache.poi.util.LittleEndian;
- import org.apache.poi.util.LittleEndianOutputStream;
-
- /**
- * TxMasterStyleAtom atom (4003).
- * <p>
- * Stores default character and paragraph styles.
- * The atom instance value is the text type and is encoded like the txstyle field in
- * TextHeaderAtom. The text styles are located in the MainMaster container,
- * except for the "other" style, which is in the Document.Environment container.
- * </p>
- * <p>
- * This atom can store up to 5 pairs of paragraph+character styles,
- * each pair describes an indent level. The first pair describes
- * first-level paragraph with no indentation.
- * </p>
- *
- * @author Yegor Kozlov
- */
- public final class TxMasterStyleAtom extends RecordAtom {
- /**
- * Maximum number of indentation levels allowed in PowerPoint documents
- */
- public static final int MAX_INDENT = 5;
-
- private byte[] _header;
- private static long _type = 4003;
- private byte[] _data;
-
- private List<TextPropCollection> paragraphStyles;
- private List<TextPropCollection> charStyles;
-
- protected TxMasterStyleAtom(byte[] source, int start, int len) {
- _header = new byte[8];
- System.arraycopy(source,start,_header,0,8);
-
- _data = new byte[len-8];
- System.arraycopy(source,start+8,_data,0,_data.length);
-
- //read available styles
- try {
- init();
- } catch (Exception e){
- e.printStackTrace();
- }
- }
-
- /**
- * We are of type 4003
- *
- * @return type of this record
- * @see RecordTypes#TxMasterStyleAtom
- */
- public long getRecordType() {
- return _type;
- }
-
- /**
- * Write the contents of the record back, so it can be written
- * to disk
- */
- public void writeOut(OutputStream out) throws IOException {
- // Write out the (new) header
- out.write(_header);
-
- // Write out the record data
- out.write(_data);
-
- }
-
- /**
- * Returns array of character styles defined in this record.
- *
- * @return character styles defined in this record
- */
- public List<TextPropCollection> getCharacterStyles(){
- return charStyles;
- }
-
- /**
- * Returns array of paragraph styles defined in this record.
- *
- * @return paragraph styles defined in this record
- */
- public List<TextPropCollection> getParagraphStyles(){
- return paragraphStyles;
- }
-
- /**
- * Return type of the text.
- * Must be a constant defined in <code>TextHeaderAtom</code>
- *
- * @return type of the text
- * @see TextHeaderAtom
- */
- public int getTextType(){
- //The atom instance value is the text type
- return LittleEndian.getShort(_header, 0) >> 4;
- }
-
- /**
- * parse the record data and initialize styles
- */
- protected void init(){
- //type of the text
- int type = getTextType();
-
- int head;
- int pos = 0;
-
- //number of indentation levels
- short levels = LittleEndian.getShort(_data, 0);
- pos += LittleEndian.SHORT_SIZE;
-
- paragraphStyles = new ArrayList<TextPropCollection>(levels);
- charStyles = new ArrayList<TextPropCollection>(levels);
-
- for(short i = 0; i < levels; i++) {
- TextPropCollection prprops = new TextPropCollection(0, TextPropType.paragraph);
- if (type >= TextHeaderAtom.CENTRE_BODY_TYPE) {
- // Fetch the 2 byte value, that is safe to ignore for some types of text
- short indentLevel = LittleEndian.getShort(_data, pos);
- prprops.setIndentLevel(indentLevel);
- pos += LittleEndian.SHORT_SIZE;
- } else {
- prprops.setIndentLevel((short)-1);
- }
-
- head = LittleEndian.getInt(_data, pos);
- pos += LittleEndian.INT_SIZE;
-
- pos += prprops.buildTextPropList( head, _data, pos);
- paragraphStyles.add(prprops);
-
- head = LittleEndian.getInt(_data, pos);
- pos += LittleEndian.INT_SIZE;
- TextPropCollection chprops = new TextPropCollection(0, TextPropType.character);
- pos += chprops.buildTextPropList( head, _data, pos);
- charStyles.add(chprops);
- }
- }
-
- /**
- * Updates the rawdata from the modified paragraph/character styles
- *
- * @since 3.14-beta1
- */
- public void updateStyles() {
- int type = getTextType();
-
- try {
- ByteArrayOutputStream bos = new ByteArrayOutputStream();
- LittleEndianOutputStream leos = new LittleEndianOutputStream(bos);
- int levels = paragraphStyles.size();
- leos.writeShort(levels);
-
- TextPropCollection prdummy = new TextPropCollection(0, TextPropType.paragraph);
- TextPropCollection chdummy = new TextPropCollection(0, TextPropType.character);
-
- for (int i=0; i<levels; i++) {
- prdummy.copy(paragraphStyles.get(i));
- chdummy.copy(charStyles.get(i));
- if (type >= TextHeaderAtom.CENTRE_BODY_TYPE) {
- leos.writeShort(prdummy.getIndentLevel());
- }
-
- // Indent level is not written for master styles
- prdummy.setIndentLevel((short)-1);
- prdummy.writeOut(bos, true);
- chdummy.writeOut(bos, true);
- }
-
- _data = bos.toByteArray();
- leos.close();
-
- LittleEndian.putInt(_header, 4, _data.length);
- } catch (IOException e) {
- throw new HSLFException("error in updating master style properties", e);
- }
- }
- }
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