| /* ==================================================================== |
| 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.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.poi.hslf.model.textproperties.IndentProp; |
| import org.apache.poi.util.LittleEndian; |
| import org.apache.poi.util.POILogger; |
| |
| /** |
| * Specifies the Indent Level for the text |
| */ |
| public final class MasterTextPropAtom extends RecordAtom { |
| /** |
| * Record header. |
| */ |
| private byte[] _header; |
| |
| /** |
| * Record data. |
| */ |
| private byte[] _data; |
| |
| // indent details |
| private List<IndentProp> indents; |
| |
| /** |
| * Constructs a new empty master text prop atom. |
| */ |
| public MasterTextPropAtom() { |
| _header = new byte[8]; |
| _data = new byte[0]; |
| |
| LittleEndian.putShort(_header, 2, (short)getRecordType()); |
| LittleEndian.putInt(_header, 4, _data.length); |
| |
| indents = new ArrayList<IndentProp>(); |
| } |
| |
| /** |
| * Constructs the ruler atom record from its |
| * source data. |
| * |
| * @param source the source data as a byte array. |
| * @param start the start offset into the byte array. |
| * @param len the length of the slice in the byte array. |
| */ |
| protected MasterTextPropAtom(byte[] source, int start, int len) { |
| // Get the header. |
| _header = new byte[8]; |
| System.arraycopy(source,start,_header,0,8); |
| |
| // Get the record data. |
| _data = new byte[len-8]; |
| System.arraycopy(source,start+8,_data,0,len-8); |
| |
| try { |
| read(); |
| } catch (Exception e){ |
| logger.log(POILogger.ERROR, "Failed to parse MasterTextPropAtom", e); |
| } |
| } |
| |
| /** |
| * Gets the record type. |
| * |
| * @return the record type. |
| */ |
| public long getRecordType() { |
| return RecordTypes.MasterTextPropAtom.typeID; |
| } |
| |
| /** |
| * Write the contents of the record back, so it can be written |
| * to disk. |
| * |
| * @param out the output stream to write to. |
| * @throws java.io.IOException if an error occurs. |
| */ |
| public void writeOut(OutputStream out) throws IOException { |
| write(); |
| out.write(_header); |
| out.write(_data); |
| } |
| |
| /** |
| * Write the internal variables to the record bytes |
| */ |
| private void write() { |
| int pos = 0; |
| _data = new byte[indents.size()*6]; |
| for (IndentProp prop : indents) { |
| LittleEndian.putInt(_data, pos, prop.getCharactersCovered()); |
| LittleEndian.putShort(_data, pos+4, (short)prop.getIndentLevel()); |
| pos += 6; |
| } |
| } |
| |
| /** |
| * Read the record bytes and initialize the internal variables |
| */ |
| private void read() { |
| int pos = 0; |
| indents = new ArrayList<IndentProp>(_data.length/6); |
| |
| while (pos <= _data.length - 6) { |
| int count = LittleEndian.getInt(_data, pos); |
| short indent = LittleEndian.getShort(_data, pos+4); |
| indents.add(new IndentProp(count, indent)); |
| pos += 6; |
| } |
| } |
| |
| /** |
| * Returns the indent that applies at the given text offset |
| */ |
| public int getIndentAt(int offset) { |
| int charsUntil = 0; |
| for (IndentProp prop : indents) { |
| charsUntil += prop.getCharactersCovered(); |
| if (offset < charsUntil) { |
| return prop.getIndentLevel(); |
| } |
| } |
| return -1; |
| } |
| |
| public List<IndentProp> getIndents() { |
| return Collections.unmodifiableList(indents); |
| } |
| } |