95 lines
3.4 KiB
Java
95 lines
3.4 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hwpf.model;
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import org.apache.poi.util.LittleEndian;
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/**
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* This class holds all of the section formatting
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* properties from Old (Word 6 / Word 95) documents.
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* Unlike with Word 97+, it all gets held in the
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* same stream.
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* In common with the rest of the old support, it
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* is read only
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*/
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public final class OldSectionTable extends SectionTable
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{
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public OldSectionTable(byte[] documentStream, int offset,
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int size, int fcMin,
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TextPieceTable tpt)
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{
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PlexOfCps sedPlex = new PlexOfCps(documentStream, offset, size, 12);
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CharIsBytes charConv = new CharIsBytes(tpt);
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int length = sedPlex.length();
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for (int x = 0; x < length; x++)
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{
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GenericPropertyNode node = sedPlex.getProperty(x);
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SectionDescriptor sed = new SectionDescriptor(node.getBytes(), 0);
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int fileOffset = sed.getFc();
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int startAt = node.getStart();
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int endAt = node.getEnd();
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// check for the optimization
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if (fileOffset == 0xffffffff)
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{
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_sections.add(new SEPX(sed, startAt, endAt, charConv, new byte[0]));
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}
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else
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{
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// The first short at the offset is the size of the grpprl.
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int sepxSize = LittleEndian.getShort(documentStream, fileOffset);
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// Because we don't properly know about all the details of the old
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// section properties, and we're trying to decode them as if they
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// were the new ones, we sometimes "need" more data than we have.
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// As a workaround, have a few extra 0 bytes on the end!
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byte[] buf = new byte[sepxSize+2];
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fileOffset += LittleEndian.SHORT_SIZE;
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System.arraycopy(documentStream, fileOffset, buf, 0, buf.length);
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_sections.add(new SEPX(sed, startAt, endAt, charConv, buf));
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}
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}
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}
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private static class CharIsBytes implements CharIndexTranslator {
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private TextPieceTable tpt;
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private CharIsBytes(TextPieceTable tpt) {
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this.tpt = tpt;
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}
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public int getCharIndex(int bytePos, int startCP) {
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return bytePos;
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}
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public int getCharIndex(int bytePos) {
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return bytePos;
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}
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public boolean isIndexInTable(int bytePos) {
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return tpt.isIndexInTable(bytePos);
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}
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public int lookIndexBackward(int bytePos) {
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return tpt.lookIndexBackward(bytePos);
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}
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public int lookIndexForward(int bytePos) {
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return tpt.lookIndexForward(bytePos);
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}
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}
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}
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