Source Code Cross Referenced for StyleSheet.java in  » Collaboration » poi-3.0.2-beta2 » org » apache » poi » hwpf » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Collaboration » poi 3.0.2 beta2 » org.apache.poi.hwpf.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ====================================================================
002:         Licensed to the Apache Software Foundation (ASF) under one or more
003:         contributor license agreements.  See the NOTICE file distributed with
004:         this work for additional information regarding copyright ownership.
005:         The ASF licenses this file to You under the Apache License, Version 2.0
006:         (the "License"); you may not use this file except in compliance with
007:         the License.  You may obtain a copy of the License at
008:
009:         http://www.apache.org/licenses/LICENSE-2.0
010:
011:         Unless required by applicable law or agreed to in writing, software
012:         distributed under the License is distributed on an "AS IS" BASIS,
013:         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         See the License for the specific language governing permissions and
015:         limitations under the License.
016:         ==================================================================== */
017:
018:        package org.apache.poi.hwpf.model;
019:
020:        import java.util.*;
021:        import java.io.IOException;
022:
023:        import org.apache.poi.util.LittleEndian;
024:        import org.apache.poi.hwpf.model.io.HWPFOutputStream;
025:        import org.apache.poi.hwpf.usermodel.CharacterProperties;
026:        import org.apache.poi.hwpf.usermodel.ParagraphProperties;
027:        import org.apache.poi.hwpf.sprm.ParagraphSprmUncompressor;
028:        import org.apache.poi.hwpf.sprm.CharacterSprmUncompressor;
029:
030:        /**
031:         * Represents a document's stylesheet. A word documents formatting is stored as
032:         * compressed styles that are based on styles contained in the stylesheet. This
033:         * class also contains static utility functions to uncompress different
034:         * formatting properties.
035:         *
036:         * @author Ryan Ackley
037:         */
038:
039:        public class StyleSheet implements  HDFType {
040:
041:            public static final int NIL_STYLE = 4095;
042:            private static final int PAP_TYPE = 1;
043:            private static final int CHP_TYPE = 2;
044:            private static final int SEP_TYPE = 4;
045:            private static final int TAP_TYPE = 5;
046:
047:            private final static ParagraphProperties NIL_PAP = new ParagraphProperties();
048:            private final static CharacterProperties NIL_CHP = new CharacterProperties();
049:
050:            private int _stshiLength;
051:            private int _baseLength;
052:            private int _flags;
053:            private int _maxIndex;
054:            private int _maxFixedIndex;
055:            private int _stylenameVersion;
056:            private int[] _rgftc;
057:
058:            StyleDescription[] _styleDescriptions;
059:
060:            /**
061:             * StyleSheet constructor. Loads a document's stylesheet information,
062:             *
063:             * @param tableStream A byte array containing a document's raw stylesheet
064:             *        info. Found by using FileInformationBlock.getFcStshf() and
065:             *        FileInformationBLock.getLcbStshf()
066:             */
067:            public StyleSheet(byte[] tableStream, int offset) {
068:                _stshiLength = LittleEndian.getShort(tableStream, offset);
069:                offset += LittleEndian.SHORT_SIZE;
070:                int stdCount = LittleEndian.getShort(tableStream, offset);
071:                offset += LittleEndian.SHORT_SIZE;
072:                _baseLength = LittleEndian.getShort(tableStream, offset);
073:                offset += LittleEndian.SHORT_SIZE;
074:                _flags = LittleEndian.getShort(tableStream, offset);
075:                offset += LittleEndian.SHORT_SIZE;
076:                _maxIndex = LittleEndian.getShort(tableStream, offset);
077:                offset += LittleEndian.SHORT_SIZE;
078:                _maxFixedIndex = LittleEndian.getShort(tableStream, offset);
079:                offset += LittleEndian.SHORT_SIZE;
080:                _stylenameVersion = LittleEndian.getShort(tableStream, offset);
081:                offset += LittleEndian.SHORT_SIZE;
082:
083:                _rgftc = new int[3];
084:                _rgftc[0] = LittleEndian.getShort(tableStream, offset);
085:                offset += LittleEndian.SHORT_SIZE;
086:                _rgftc[1] = LittleEndian.getShort(tableStream, offset);
087:                offset += LittleEndian.SHORT_SIZE;
088:                _rgftc[2] = LittleEndian.getShort(tableStream, offset);
089:                offset += LittleEndian.SHORT_SIZE;
090:
091:                offset = (LittleEndian.SHORT_SIZE + _stshiLength);
092:                _styleDescriptions = new StyleDescription[stdCount];
093:                for (int x = 0; x < stdCount; x++) {
094:                    int stdSize = LittleEndian.getShort(tableStream, offset);
095:                    //get past the size
096:                    offset += 2;
097:                    if (stdSize > 0) {
098:                        //byte[] std = new byte[stdSize];
099:
100:                        StyleDescription aStyle = new StyleDescription(
101:                                tableStream, _baseLength, offset, true);
102:
103:                        _styleDescriptions[x] = aStyle;
104:                    }
105:
106:                    offset += stdSize;
107:
108:                }
109:                for (int x = 0; x < _styleDescriptions.length; x++) {
110:                    if (_styleDescriptions[x] != null) {
111:                        createPap(x);
112:                        createChp(x);
113:                    }
114:                }
115:            }
116:
117:            public void writeTo(HWPFOutputStream out) throws IOException {
118:                int offset = 0;
119:                // add two bytes so we can prepend the stylesheet w/ its size
120:                byte[] buf = new byte[_stshiLength + 2];
121:                LittleEndian.putShort(buf, offset, (short) _stshiLength);
122:                offset += LittleEndian.SHORT_SIZE;
123:                LittleEndian.putShort(buf, offset,
124:                        (short) _styleDescriptions.length);
125:                offset += LittleEndian.SHORT_SIZE;
126:                LittleEndian.putShort(buf, offset, (short) _baseLength);
127:                offset += LittleEndian.SHORT_SIZE;
128:                LittleEndian.putShort(buf, offset, (short) _flags);
129:                offset += LittleEndian.SHORT_SIZE;
130:                LittleEndian.putShort(buf, offset, (short) _maxIndex);
131:                offset += LittleEndian.SHORT_SIZE;
132:                LittleEndian.putShort(buf, offset, (short) _maxFixedIndex);
133:                offset += LittleEndian.SHORT_SIZE;
134:                LittleEndian.putShort(buf, offset, (short) _stylenameVersion);
135:                offset += LittleEndian.SHORT_SIZE;
136:
137:                LittleEndian.putShort(buf, offset, (short) _rgftc[0]);
138:                offset += LittleEndian.SHORT_SIZE;
139:                LittleEndian.putShort(buf, offset, (short) _rgftc[1]);
140:                offset += LittleEndian.SHORT_SIZE;
141:                LittleEndian.putShort(buf, offset, (short) _rgftc[2]);
142:
143:                out.write(buf);
144:
145:                byte[] sizeHolder = new byte[2];
146:                for (int x = 0; x < _styleDescriptions.length; x++) {
147:                    if (_styleDescriptions[x] != null) {
148:                        byte[] std = _styleDescriptions[x].toByteArray();
149:
150:                        // adjust the size so it is always on a word boundary
151:                        LittleEndian.putShort(sizeHolder,
152:                                (short) ((std.length) + (std.length % 2)));
153:                        out.write(sizeHolder);
154:                        out.write(std);
155:
156:                        // Must always start on a word boundary.
157:                        if (std.length % 2 == 1) {
158:                            out.write('\0');
159:                        }
160:                    } else {
161:                        sizeHolder[0] = 0;
162:                        sizeHolder[1] = 0;
163:                        out.write(sizeHolder);
164:                    }
165:                }
166:            }
167:
168:            public boolean equals(Object o) {
169:                StyleSheet ss = (StyleSheet) o;
170:
171:                if (ss._baseLength == _baseLength && ss._flags == _flags
172:                        && ss._maxFixedIndex == _maxFixedIndex
173:                        && ss._maxIndex == _maxIndex
174:                        && ss._rgftc[0] == _rgftc[0]
175:                        && ss._rgftc[1] == _rgftc[1]
176:                        && ss._rgftc[2] == _rgftc[2]
177:                        && ss._stshiLength == _stshiLength
178:                        && ss._stylenameVersion == _stylenameVersion) {
179:                    if (ss._styleDescriptions.length == _styleDescriptions.length) {
180:                        for (int x = 0; x < _styleDescriptions.length; x++) {
181:                            // check for null
182:                            if (ss._styleDescriptions[x] != _styleDescriptions[x]) {
183:                                // check for equality
184:                                if (!ss._styleDescriptions[x]
185:                                        .equals(_styleDescriptions[x])) {
186:                                    return false;
187:                                }
188:                            }
189:                        }
190:                        return true;
191:                    }
192:                }
193:                return false;
194:            }
195:
196:            /**
197:             * Creates a PartagraphProperties object from a papx stored in the
198:             * StyleDescription at the index istd in the StyleDescription array. The PAP
199:             * is placed in the StyleDescription at istd after its been created. Not
200:             * every StyleDescription will contain a papx. In these cases this function
201:             * does nothing
202:             *
203:             * @param istd The index of the StyleDescription to create the
204:             *        ParagraphProperties  from (and also place the finished PAP in)
205:             */
206:            private void createPap(int istd) {
207:                StyleDescription sd = _styleDescriptions[istd];
208:                ParagraphProperties pap = sd.getPAP();
209:                byte[] papx = sd.getPAPX();
210:                int baseIndex = sd.getBaseStyle();
211:                if (pap == null && papx != null) {
212:                    ParagraphProperties parentPAP = new ParagraphProperties();
213:                    if (baseIndex != NIL_STYLE) {
214:
215:                        parentPAP = _styleDescriptions[baseIndex].getPAP();
216:                        if (parentPAP == null) {
217:                            if (baseIndex == istd) {
218:                                // Oh dear, style claims that it is its own parent
219:                                throw new IllegalStateException(
220:                                        "Pap style "
221:                                                + istd
222:                                                + " claimed to have itself as its parent, which isn't allowed");
223:                            } else {
224:                                // Create the parent style
225:                                createPap(baseIndex);
226:                                parentPAP = _styleDescriptions[baseIndex]
227:                                        .getPAP();
228:                            }
229:                        }
230:
231:                    }
232:
233:                    pap = (ParagraphProperties) ParagraphSprmUncompressor
234:                            .uncompressPAP(parentPAP, papx, 2);
235:                    sd.setPAP(pap);
236:                }
237:            }
238:
239:            /**
240:             * Creates a CharacterProperties object from a chpx stored in the
241:             * StyleDescription at the index istd in the StyleDescription array. The
242:             * CharacterProperties object is placed in the StyleDescription at istd after
243:             * its been created. Not every StyleDescription will contain a chpx. In these
244:             * cases this function does nothing.
245:             *
246:             * @param istd The index of the StyleDescription to create the
247:             *        CharacterProperties object from.
248:             */
249:            private void createChp(int istd) {
250:                StyleDescription sd = _styleDescriptions[istd];
251:                CharacterProperties chp = sd.getCHP();
252:                byte[] chpx = sd.getCHPX();
253:                int baseIndex = sd.getBaseStyle();
254:                if (chp == null && chpx != null) {
255:                    CharacterProperties parentCHP = new CharacterProperties();
256:                    if (baseIndex != NIL_STYLE) {
257:
258:                        parentCHP = _styleDescriptions[baseIndex].getCHP();
259:                        if (parentCHP == null) {
260:                            createChp(baseIndex);
261:                            parentCHP = _styleDescriptions[baseIndex].getCHP();
262:                        }
263:
264:                    }
265:
266:                    chp = (CharacterProperties) CharacterSprmUncompressor
267:                            .uncompressCHP(parentCHP, chpx, 0);
268:                    sd.setCHP(chp);
269:                }
270:            }
271:
272:            /**
273:             * Gets the number of styles in the style sheet.
274:             * @return The number of styles in the style sheet.
275:             */
276:            public int numStyles() {
277:                return _styleDescriptions.length;
278:            }
279:
280:            /**
281:             * Gets the StyleDescription at index x.
282:             *
283:             * @param x the index of the desired StyleDescription.
284:             */
285:            public StyleDescription getStyleDescription(int x) {
286:                return _styleDescriptions[x];
287:            }
288:
289:            public CharacterProperties getCharacterStyle(int x) {
290:                if (x == NIL_STYLE) {
291:                    return NIL_CHP;
292:                }
293:                return (_styleDescriptions[x] != null ? _styleDescriptions[x]
294:                        .getCHP() : null);
295:            }
296:
297:            public ParagraphProperties getParagraphStyle(int x) {
298:                if (x == NIL_STYLE) {
299:                    return NIL_PAP;
300:                }
301:                return (_styleDescriptions[x] != null ? _styleDescriptions[x]
302:                        .getPAP() : null);
303:            }
304:
305:        }
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