Tilman, I am sorry, I did not read your last message before writing mine :( I am currently in "Digest" mode and as soon as I sent my message, the digest arrived (odd).
Thank you. El mar., 6 nov. 2018 a las 16:30, <[email protected]> escribió: > > ---------- Forwarded message ---------- > From: Tilman Hausherr <[email protected]> > To: [email protected] > Cc: > Bcc: > Date: Tue, 6 Nov 2018 17:46:07 +0100 > Subject: Re: Extracting page "correctly" > Here's some code for you to try. It should work with any fine rotation, > I have tested it on 2 files LOL. Please tell if it works for you. > > > /** > * > * @author Tilman Hausherr > */ > public class ExtractAngledText > { > Set<Integer> angles = new HashSet<>(); > > public Set<Integer> getAngles() > { > return angles; > } > > /** > * This will print the documents data. > * > * @param args The command line arguments. > * > * @throws IOException If there is an error parsing the document. > */ > public static void main(String[] args) throws IOException > { > args = new String[]{"PDFBOX-4368-many-rotations.pdf"}; > if (args.length != 1) > { > usage(); > } > else > { > AngleCollector angleCollector = new AngleCollector(); > try (PDDocument doc = PDDocument.load(new File(args[0]))) > { > for (int p = 1; p <= doc.getNumberOfPages(); ++p) > { > System.out.printf("Page: %3d\n", p); > System.out.println("----------"); > > angleCollector.setStartPage(p); > angleCollector.setEndPage(p); > angleCollector.getText(doc); > System.out.println("Collected angles: " + > angleCollector.getAngles()); > System.out.println(); > > PDPage page = doc.getPage(0); > FilteredTextStripper filteredTextStripper = new > FilteredTextStripper(); > for (int angle : angleCollector.getAngles()) > { > filteredTextStripper.setStartPage(p); > filteredTextStripper.setEndPage(p); > > System.out.printf("Angle: %3d\n", angle); > System.out.println("----------"); > String text; > if (angle == 0) > { > text = filteredTextStripper.getText(doc); > } > else > { > // prepend a transformation > try (PDPageContentStream cs = new > PDPageContentStream(doc, page, AppendMode.PREPEND, false)) > { > cs.transform(Matrix.getRotateInstance(-Math.toRadians(angle), 0, 0)); > } > > text = filteredTextStripper.getText(doc); > > // remove transformation > COSArray contents = (COSArray) > page.getCOSObject().getItem(COSName.CONTENTS); > contents.remove(0); > } > System.out.println(text); > } > } > } > } > } > > /** > * This will print the usage for this document. > */ > private static void usage() > { > System.err.println("Usage: java " + > AngleCollector.class.getName() + " <input-pdf>"); > } > } > > class AngleCollector extends PDFTextStripper > { > Set<Integer> angles = new HashSet<>(); > > public Set<Integer> getAngles() > { > return angles; > } > > /** > * Instantiate a new PDFTextStripper object. > * > * @throws IOException If there is an error loading the properties. > */ > public AngleCollector() throws IOException > { > } > > @Override > protected void processTextPosition(TextPosition text) > { > Matrix m = text.getTextMatrix(); > int angle = (int) > Math.round(Math.toDegrees(Math.atan2(m.getShearY(), m.getScaleY()))); > angles.add(angle); > } > } > > class FilteredTextStripper extends PDFTextStripper > { > public FilteredTextStripper() throws IOException > { > } > > @Override > protected void processTextPosition(TextPosition text) > { > Matrix m = text.getTextMatrix(); > int angle = (int) > Math.round(Math.toDegrees(Math.atan2(m.getShearY(), m.getScaleY()))); > if (angle == 0) > { > super.processTextPosition(text); > } > } > } > > >
