Java Code Examples for org.apache.pdfbox.contentstream.operator.Operator#getName()

/**
 * This is used to handle an operation.
 * 
 * @param operator The operation to perform.
 * @param operands The list of arguments.
 * @throws IOException If there is an error processing the operation.
 */
private void processOperator(Operator operator, List<COSBase> operands) throws IOException
{
    String name = operator.getName();
    
    if (OperatorName.SET_FONT_AND_SIZE.equals(name))
    {
        processSetFont(operands);
    }
    else if (OperatorName.NON_STROKING_GRAY.equals(name))
    {
        processSetFontColor(operands);
    }
    else if (OperatorName.NON_STROKING_RGB.equals(name))
    {
        processSetFontColor(operands);
    }
    else if (OperatorName.NON_STROKING_CMYK.equals(name))
    {
        processSetFontColor(operands);
    }
}
 

/**
 * This is used to handle an operation.
 * 
 * @param operator The operation to perform.
 * @param operands The list of arguments.
 * @throws IOException If there is an error processing the operation.
 */
protected void processOperator(Operator operator, List<COSBase> operands) throws IOException
{
    String name = operator.getName();
    OperatorProcessor processor = operators.get(name);
    if (processor != null)
    {
        processor.setContext(this);
        try
        {
            processor.process(operator, operands);
        }
        catch (IOException e)
        {
            operatorException(operator, operands, e);
        }
    }
    else
    {
        unsupportedOperator(operator, operands);
    }
}
 

@Override protected void processOperator(Operator operator, List<COSBase> operands)
    throws IOException
{
    String operation = operator.getName();
    if ("Do".equals(operation)) {
        COSName objectName = (COSName) operands.get(0);
        PDXObject xobject = getResources().getXObject(objectName);

        if (xobject instanceof PDImageXObject) {
            PDImageXObject image = (PDImageXObject) xobject;
            Matrix ctmNew = getGraphicsState().getCurrentTransformationMatrix();
            PDRectangle pageRect = this.getCurrentPage().getCropBox();
            float w = ctmNew.getScalingFactorX();
            float h = ctmNew.getScalingFactorY();
            float x = ctmNew.getTranslateX();
            float y = pageRect.getHeight() - ctmNew.getTranslateY() - h;
            buffer.add(new ImageOperator(x, y, w, h));
        }
        else if (xobject instanceof PDFormXObject) {
            PDFormXObject form = (PDFormXObject) xobject;
            showForm(form);
        }
    }
    else {
        super.processOperator(operator, operands);
    }
}
 

/**
 * <a href="http://stackoverflow.com/questions/38498431/how-to-remove-filtered-content-from-a-pdf-with-itext">
 * How to remove filtered content from a PDF with iText
 * </a>
 * <br/>
 * <a href="https://1drv.ms/b/s!AmNST-TRoPSemi2k0UnGFsjQM1Yt">
 * document.pdf
 * </a>
 * <p>
 * This test shows how to remove text filtered by actual font size.
 * </p>
 */
@Test
public void testRemoveBigTextDocument() throws IOException {
    try (   InputStream resource = getClass().getResourceAsStream("document.pdf");
            PDDocument document = Loader.loadPDF(resource)) {
        for (PDPage page : document.getDocumentCatalog().getPages()) {
            PdfContentStreamEditor identity = new PdfContentStreamEditor(document, page) {
                @Override
                protected void write(ContentStreamWriter contentStreamWriter, Operator operator, List<COSBase> operands) throws IOException {
                    String operatorString = operator.getName();

                    if (TEXT_SHOWING_OPERATORS.contains(operatorString))
                    {
                        float fs = getGraphicsState().getTextState().getFontSize();
                        Matrix matrix = getTextMatrix().multiply(getGraphicsState().getCurrentTransformationMatrix());
                        Point2D.Float transformedFsVector = matrix.transformPoint(0, fs);
                        Point2D.Float transformedOrigin = matrix.transformPoint(0, 0);
                        double transformedFs = transformedFsVector.distance(transformedOrigin);
                        if (transformedFs > 100)
                            return;
                    }

                    super.write(contentStreamWriter, operator, operands);
                }

                final List<String> TEXT_SHOWING_OPERATORS = Arrays.asList("Tj", "'", "\"", "TJ");
            };
            identity.processPage(page);
        }
        document.save(new File(RESULT_FOLDER, "document-noBigText.pdf"));
    }
}
 

/**
 * <a href="https://stackoverflow.com/questions/61202822/remove-large-tokens-from-pdf-using-pdfbox-or-equivalent-library">
 * Remove Large Tokens from PDF using PDFBox or equivalent library
 * </a>
 * <br/>
 * <a href="https://drive.google.com/file/d/184waC6PjjDi8yolIZN5R-6vgWGR5SvKl/view?usp=sharing">
 * kommers_annons_elite.pdf
 * </a>
 * <p>
 * This test shows how to remove text filtered by actual font size.
 * </p>
 */
@Test
public void testRemoveBigTextKommersAnnonsElite() throws IOException {
    try (   InputStream resource = getClass().getResourceAsStream("kommers_annons_elite.pdf");
            PDDocument document = Loader.loadPDF(resource)) {
        PDPage page = document.getPage(0);
        PdfContentStreamEditor editor = new PdfContentStreamEditor(document, page) {
            @Override
            protected void write(ContentStreamWriter contentStreamWriter, Operator operator, List<COSBase> operands) throws IOException {
                String operatorString = operator.getName();

                if (TEXT_SHOWING_OPERATORS.contains(operatorString))
                {
                    float fs = getGraphicsState().getTextState().getFontSize();
                    Matrix matrix = getTextMatrix().multiply(getGraphicsState().getCurrentTransformationMatrix());
                    Point2D.Float transformedFsVector = matrix.transformPoint(0, fs);
                    Point2D.Float transformedOrigin = matrix.transformPoint(0, 0);
                    double transformedFs = transformedFsVector.distance(transformedOrigin);
                    if (transformedFs > 50)
                        return;
                }

                super.write(contentStreamWriter, operator, operands);
            }

            final List<String> TEXT_SHOWING_OPERATORS = Arrays.asList("Tj", "'", "\"", "TJ");
        };
        editor.processPage(page);
        document.save(new File(RESULT_FOLDER, "kommers_annons_elite-noBigText.pdf"));
    }
}
 

@Override
protected void processOperator(Operator operator, List<COSBase> operands) throws IOException {
    String operation = operator.getName();
    if (fillOperations.contains(operation)) {
        PDColor color = getGraphicsState().getNonStrokingColor();
        PDAbstractPattern pattern = getResources().getPattern(color.getPatternName());
        if (pattern instanceof PDTilingPattern) {
            processTilingPattern((PDTilingPattern) pattern, null, null);
        }
    }
    super.processOperator(operator, operands);
}