source: trunk/src/org/expeditee/io/PDF2Writer.java@ 1102

Last change on this file since 1102 was 1102, checked in by davidb, 6 years ago

Reworking of the code-base to separate logic from graphics. This version of Expeditee now supports a JFX graphics as an alternative to SWING
File size: 12.5 KB
Line 
1/**
2 * PDF2Writer.java
3 * Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19package org.expeditee.io;
20
21import java.io.FileOutputStream;
22import java.io.IOException;
23import java.io.Writer;
24import java.util.Collection;
25import java.util.HashSet;
26import java.util.Iterator;
27import java.util.LinkedList;
28import java.util.List;
29import java.util.Set;
30
31import org.expeditee.core.Colour;
32import org.expeditee.core.Dimension;
33import org.expeditee.core.Image;
34import org.expeditee.core.bounds.PolygonBounds;
35import org.expeditee.gio.swing.SwingConversions;
36import org.expeditee.gio.swing.SwingMiscManager;
37import org.expeditee.gui.DisplayController;
38import org.expeditee.gui.Frame;
39import org.expeditee.gui.FrameGraphics;
40import org.expeditee.items.Circle;
41import org.expeditee.items.Item;
42import org.expeditee.items.Line;
43import org.expeditee.items.Picture;
44import org.expeditee.items.Text;
45import org.expeditee.settings.UserSettings;
46
47import com.lowagie.text.Anchor;
48import com.lowagie.text.Chunk;
49import com.lowagie.text.Document;
50import com.lowagie.text.DocumentException;
51import com.lowagie.text.Font;
52import com.lowagie.text.FontFactory;
53import com.lowagie.text.Rectangle;
54import com.lowagie.text.pdf.ColumnText;
55import com.lowagie.text.pdf.PdfContentByte;
56import com.lowagie.text.pdf.PdfWriter;
57
58/**
59 * @author jts21
60 *
61 */
62public class PDF2Writer extends DefaultTreeWriter {
63
64 private class OrderedHashSet<T> implements Set<T> {
65 private List<T> _orderedList;
66 private HashSet<T> _hashSet;
67 public OrderedHashSet() {
68 super();
69 _orderedList = new LinkedList<T>();
70 _hashSet = new HashSet<T>();
71 }
72
73 @Override
74 public Iterator<T> iterator() {
75 return _orderedList.iterator();
76 }
77
78 @Override
79 public void clear() {
80 _hashSet.clear();
81 _orderedList.clear();
82 }
83
84 @Override
85 public boolean add(T o) {
86 return _hashSet.add(o) && _orderedList.add(o);
87 }
88
89 @Override
90 public boolean remove(Object o) {
91 return _hashSet.remove(o) && _orderedList.remove(o);
92 }
93
94 @Override
95 public int size() {
96 return _orderedList.size();
97 }
98
99 @Override
100 public boolean isEmpty() {
101 return _orderedList.isEmpty();
102 }
103
104 @Override
105 public boolean contains(Object o) {
106 return _hashSet.contains(o);
107 }
108
109 @Override
110 public Object[] toArray() {
111 return _orderedList.toArray();
112 }
113
114 @SuppressWarnings("hiding")
115 @Override
116 public <T> T[] toArray(T[] a) {
117 return _orderedList.toArray(a);
118 }
119
120 @Override
121 public boolean containsAll(Collection<?> c) {
122 return _hashSet.containsAll(c);
123 }
124
125 @Override
126 public boolean addAll(Collection<? extends T> c) {
127 return _hashSet.addAll(c) && _orderedList.addAll(c);
128 }
129
130 @Override
131 public boolean retainAll(Collection<?> c) {
132 return _hashSet.retainAll(c) && _orderedList.retainAll(c);
133 }
134
135 @Override
136 public boolean removeAll(Collection<?> c) {
137 return _hashSet.removeAll(c) && _orderedList.removeAll(c);
138 }
139 }
140
141 private Document _pdfDocument;
142 private Dimension _pageSize;
143 private PdfWriter _pdfWriter;
144 private float _height;
145 private boolean _first = true;
146 private OrderedHashSet<Frame> _frames = null;
147
148 public PDF2Writer() {
149 _pageSize = DisplayController.getFramePaintArea().getSize();
150 _pdfDocument = new Document(new Rectangle(_pageSize.width, _pageSize.height));
151 }
152
153 @Override
154 protected void initialise(Frame start, Writer writer) throws IOException {
155 _format = ".pdf";
156 super.initialise(start, writer);
157 try {
158 _pdfWriter = PdfWriter.getInstance(_pdfDocument,
159 new FileOutputStream(_filename));
160 _pdfDocument.open();
161 _pdfDocument.addCreationDate();
162 _pdfDocument.addAuthor(UserSettings.UserName.get());
163 _pdfDocument.addCreator("Expeditee");
164 _pdfDocument.addTitle(start.getTitle());
165 _height = _pdfWriter.getPageSize().getHeight();
166 } catch (DocumentException e) {
167 e.printStackTrace();
168 throw new IOException(e.getMessage());
169 }
170 }
171
172 @Override
173 protected String finalise() throws IOException {
174 _pdfDocument.close();
175 return super.finalise();
176 }
177
178 /**
179 * Used to make sure that only links with valid targets are used
180 * @param start
181 */
182 private boolean findValidLinksRecursive(Frame current, Set<Frame> known) {
183 if(current == null || known.contains(current))
184 return false;
185 known.add(current);
186
187 Frame child;
188 for(Item i : current.getItems()) {
189 if(i.isAnnotation())
190 continue;
191 if((child = i.getChild()) != null)
192 findValidLinksRecursive(child, known);
193 }
194
195 return true;
196 }
197
198 @Override
199 protected void outputTree(Frame toWrite) throws IOException {
200 if (toWrite == null)
201 return;
202 _frames = new OrderedHashSet<Frame>();
203
204 findValidLinksRecursive(toWrite, _frames);
205
206 for(Frame f : _frames) {
207 if(f == null)
208 continue;
209 writeStartFrame(f);
210 Text title = f.getTitleItem();
211 for(Item i : f.getItems()) {
212 if(i != title) {
213 this.writeItem(i);
214 }
215 }
216 // draw title last since it needs to be handled separately from other items,
217 // and also drawn on top of shapes
218 if (title != null) {
219 if (title.isAnnotation())
220 this.writeAnnotationTitle(title);
221 else
222 this.writeTitle(title, f.getItems());
223 }
224 }
225 }
226
227 @Override
228 protected void writeStartFrame(Frame starting) throws IOException {
229 // start a new page
230 if(!_first) {
231 _pdfDocument.newPage();
232 } else {
233 _first = false;
234 }
235 // set bg color
236 PdfContentByte cb = _pdfWriter.getDirectContent();
237 cb.setColorFill(SwingConversions.toSwingColor(starting.getPaintBackgroundColor()));
238 cb.rectangle(0, 0, _pageSize.width, _pageSize.height);
239 cb.fill();
240 // super.writeStartFrame(starting);
241 }
242
243 private void drawPolygon(PdfContentByte cb, PolygonBounds poly, Colour fill, Colour line, float lineThickness) {
244 if(poly != null) {
245 cb.moveTo(poly.toArray()[0].x, _height - poly.toArray()[0].y);
246 for(int i = 1; i < poly.toArray().length; i++) {
247 cb.lineTo(poly.toArray()[i].x, _height - poly.toArray()[i].y);
248 }
249 cb.closePath();
250 if(fill != null) {
251 cb.setColorFill(SwingConversions.toSwingColor(fill));
252 if(lineThickness > 0) {
253 cb.setLineWidth(lineThickness);
254 cb.setColorStroke(SwingConversions.toSwingColor(line));
255 cb.fillStroke();
256 } else {
257 cb.fill();
258 }
259 } else {
260 cb.setLineWidth(lineThickness);
261 cb.setColorStroke(SwingConversions.toSwingColor(line));
262 cb.stroke();
263 }
264 }
265 }
266
267 private void drawMark(PdfContentByte cb, Item i, float x, float y) {
268 if(i == null) return;
269 boolean hasLink = i.getLink() != null;
270
271 if (hasLink) {
272
273 Colour lineColor = Colour.BLACK, fillColor = null;
274 PolygonBounds poly = new PolygonBounds(i.getLinkBounds().getPolygon(16));
275 poly.translate((int) (x - Item.LEFT_MARGIN), (int) (_height - y - i.getBoundsHeight() / 2));
276
277 drawPolygon(cb, poly, fillColor, lineColor, 0.5f);
278 }
279 }
280
281 private void writeAnchor(PdfContentByte cb, Item i, Anchor a, float x, float y) {
282 if(i.getParent() != null && i.getParent().getTitleItem()!=null && i.getParent().getTitleItem().equals(i)) {
283 a.setName(i.getParent().getName());
284 }
285 if(_frames != null && i.getChild() != null && _frames.contains(i.getChild())) {
286 a.setReference("#" + i.getAbsoluteLink());
287 drawMark(cb, i, x, y);
288 }
289
290 ColumnText.showTextAligned(cb, PdfContentByte.ALIGN_LEFT, a, x, y, 0);
291 }
292
293 @Override
294 protected void writeTitle(Text title, List<Item> items) throws IOException {
295 writeText(title);
296 }
297
298 @Override
299 protected void writeText(Text text) throws IOException {
300 PdfContentByte cb = _pdfWriter.getDirectContent();
301 Font font = FontFactory.getFont(Conversion.getPdfFont(text.getFamily()),
302 text.getSize(),
303 SwingConversions.toSwingFontStyle(text.getPaintFont().getStyle()),
304 SwingConversions.toSwingColor(text.getPaintColor()));
305
306 // we draw some text on a certain position
307 float x = text.getX(), y = _pdfWriter.getPageSize().getHeight() - text.getY();
308 List<String> textLines = text.getTextList();
309 for(int i = 0; i < textLines.size(); i++){
310 Chunk chunk = new Chunk(textLines.get(i), font);
311 Anchor anchor = new Anchor(chunk);
312 writeAnchor(cb, text, anchor, x, y);
313 y -= text.getLineHeight();
314 }
315 }
316
317 @Override
318 protected void writePicture(Picture pic) throws IOException {
319 Image image = pic.getCroppedImage();
320 try {
321 PdfContentByte cb = _pdfWriter.getDirectContent();
322 com.lowagie.text.Image iTextImage = com.lowagie.text.Image.getInstance(SwingMiscManager.getIfUsingSwingImageManager().getInternalImage(image), null);
323 float angle = (float) (pic.getRotate() * Math.PI / 180);
324 double sin = Math.sin(angle), cos = Math.cos(angle);
325 int w = pic.getWidth(), h = pic.getHeight();
326 iTextImage.scalePercent(pic.getScale() * 100);
327 iTextImage.setRotation(-angle);
328 Chunk chunk = new Chunk(iTextImage, 0, 0);
329 Anchor anchor = new Anchor(chunk);
330 writeAnchor(cb, pic, anchor,
331 (float) (pic.getX() + (w - Math.abs(w * cos + h * sin)) / 2),
332 (float) (_height - pic.getY() - (h + Math.abs(w * sin + h * cos)) / 2));
333 // cb.addImage(iTextImage);
334 } catch (DocumentException e) {
335 e.printStackTrace();
336 }
337 }
338
339 @Override
340 protected void writeCircle(Circle circle) {
341 PdfContentByte cb = _pdfWriter.getDirectContent();
342 cb.circle(circle.getCenter().getX(), _pdfWriter.getPageSize().getHeight() - circle.getCenter().getY(), (float) circle.getRadius());
343 cb.setColorFill(SwingConversions.toSwingColor(circle.getFillColor()));
344 if(circle.getThickness() > 0) {
345 cb.setLineWidth(circle.getThickness());
346 cb.setColorStroke(SwingConversions.toSwingColor(circle.getPaintColor()));
347 cb.fillStroke();
348 } else {
349 cb.fill();
350 }
351 }
352
353 private List<Line> seenLines = new LinkedList<Line>();
354 @Override
355 protected void writeLine(Line line) throws IOException {
356 if(seenLines.contains(line)) {
357 return;
358 }
359 PdfContentByte cb = _pdfWriter.getDirectContent();
360 if(line.getStartItem().isEnclosed()) {
361 seenLines.add(line);
362 Line currentLine = line;
363 Item currentItem = line.getStartItem();
364 cb.moveTo(currentItem.getX(), _height - currentItem.getY());
365 for(;;) {
366 currentItem = currentLine.getOppositeEnd(currentItem);
367 cb.lineTo(currentItem.getX(), _height - currentItem.getY());
368 for(Line l : currentItem.getLines()) {
369 if(l.equals(currentLine)) {
370 continue;
371 }
372 currentLine = l;
373 break;
374 }
375 if(currentLine == null || currentLine.equals(line)) {
376 break;
377 }
378 seenLines.add(currentLine);
379 }
380 cb.closePath();
381 Colour fill = currentItem.getFillColor();
382 if(fill != null) {
383 cb.setColorFill(SwingConversions.toSwingColor(fill));
384 if(currentItem.getThickness() > 0) {
385 cb.setLineWidth(currentItem.getThickness());
386 cb.setColorStroke(SwingConversions.toSwingColor(currentLine.getPaintColor()));
387 cb.fillStroke();
388 } else {
389 cb.fill();
390 }
391 } else if(currentItem.getThickness() > 0) {
392 cb.setLineWidth(currentItem.getThickness());
393 cb.setColorStroke(SwingConversions.toSwingColor(currentLine.getPaintColor()));
394 cb.stroke();
395 }
396 } else {
397 for(Item l : line.getStartItem().getAllConnected()) {
398 if(l instanceof Line && !seenLines.contains(l)) {
399 seenLines.add((Line) l);
400 Item start = ((Line) l).getStartItem();
401 Item end = ((Line) l).getEndItem();
402 cb.moveTo(start.getX(), _height - start.getY());
403 cb.lineTo(end.getX(), _height - end.getY());
404 cb.closePath();
405 if(l.getThickness() >= 0) {
406 cb.setLineWidth(l.getThickness());
407 cb.setColorStroke(SwingConversions.toSwingColor(l.getPaintColor()));
408 cb.stroke();
409 }
410 drawPolygon(cb, ((Line) l).getStartArrow(), l.getPaintColor(), l.getPaintColor(), l.getThickness());
411 drawPolygon(cb, ((Line) l).getEndArrow(), l.getPaintColor(), l.getPaintColor(), l.getThickness());
412 }
413 }
414 }
415 }
416
417 @Override
418 protected Collection<Item> getItemsToWrite(Frame toWrite) {
419 return toWrite.getVisibleItems();
420 }
421}
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