Examples of com.itextpdf.text.pdf.PdfDictionary

com.itextpdf.text.pdf.PdfDictionary
PdfDictionary is the Pdf dictionary object.
A dictionary is an associative table containing pairs of objects. The first element of each pair is called the key and the second element is called the value. Unlike dictionaries in the PostScript language, a key must be a PdfName. A value can be any kind of PdfObject, including a dictionary. A dictionary is generally used to collect and tie together the attributes of a complex object, with each key-value pair specifying the name and value of an attribute.
A dictionary is represented by two left angle brackets (<<), followed by a sequence of key-value pairs, followed by two right angle brackets (>>).
This object is described in the 'Portable Document Format Reference Manual version 1.7' section 3.2.6 (page 59-60).
@see PdfObject @see PdfName @see BadPdfFormatException

     * @param ref the reference to the image dictionary
     * @throws BadElementException on error
     * @return the image
     */
    public static Image getInstance(PRIndirectReference ref) throws BadElementException {
        PdfDictionary dic = (PdfDictionary)PdfReader.getPdfObjectRelease(ref);
        int width = ((PdfNumber)PdfReader.getPdfObjectRelease(dic.get(PdfName.WIDTH))).intValue();
        int height = ((PdfNumber)PdfReader.getPdfObjectRelease(dic.get(PdfName.HEIGHT))).intValue();
        Image imask = null;
        PdfObject obj = dic.get(PdfName.SMASK);
        if (obj != null && obj.isIndirect()) {
            imask = getInstance((PRIndirectReference)obj);
        }
        else {
            obj = dic.get(PdfName.MASK);
            if (obj != null && obj.isIndirect()) {
                PdfObject obj2 = PdfReader.getPdfObjectRelease(obj);
                if (obj2 instanceof PdfDictionary)
                    imask = getInstance((PRIndirectReference)obj);
            }

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     * @return the provided renderListener
     * @throws IOException if operations on the reader fail
     */
    
    public <E extends RenderListener> E processContent(int pageNumber, E renderListener) throws IOException{
        PdfDictionary pageDic = reader.getPageN(pageNumber);
        PdfDictionary resourcesDic = pageDic.getAsDict(PdfName.RESOURCES);
        
        PdfContentStreamProcessor processor = new PdfContentStreamProcessor(renderListener);
        processor.processContent(ContentByteUtils.getContentBytesForPage(reader, pageNumber), resourcesDic);        
        return renderListener;

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     * @return  a byte array with the effective content stream of a page
     * @throws IOException
     * @since 5.0.1
     */
    public static byte[] getContentBytesForPage(PdfReader reader, int pageNum) throws IOException {
        final PdfDictionary pageDictionary = reader.getPageN(pageNum);
        final PdfObject contentObject = pageDictionary.get(PdfName.CONTENTS);
        if (contentObject == null)
            return new byte[0];
        
        final byte[] contentBytes = ContentByteUtils.getContentBytesFromContentObject(contentObject);
        return contentBytes;

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    /**
     * Displays an XObject using the registered handler for this XObject's subtype
     * @param xobjectName the name of the XObject to retrieve from the resource dictionary
     */
    private void displayXObject(PdfName xobjectName) throws IOException {
        PdfDictionary xobjects = resources.getAsDict(PdfName.XOBJECT);
        PdfObject xobject = xobjects.getDirectObject(xobjectName);
        PdfStream xobjectStream = (PdfStream)xobject;
        
        PdfName subType = xobjectStream.getAsName(PdfName.SUBTYPE);
        if (xobject.isStream()){
            XObjectDoHandler handler = xobjectDoHandlers.get(subType);
            if (handler == null)
                handler = xobjectDoHandlers.get(PdfName.DEFAULT);
            handler.handleXObject(this, xobjectStream, xobjects.getAsIndirectObject(xobjectName));
        } else {
            throw new IllegalStateException(MessageLocalization.getComposedMessage("XObject.1.is.not.a.stream", xobjectName));
        }
        
    }

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        }


        @Override
        public PdfObject getDirectObject(PdfName key) {
            for (int i = resourcesStack.size() - 1; i >= 0; i--){
                PdfDictionary subResource = resourcesStack.get(i);
                if (subResource != null){
                    PdfObject obj =  subResource.getDirectObject(key);
                    if (obj != null) return obj;
                }
            }
            return super.getDirectObject(key); // shouldn't be necessary, but just in case we've done something crazy
        }

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    private static class SetTextFont implements ContentOperator{
        public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
            PdfName fontResourceName = (PdfName)operands.get(0);
            float size = ((PdfNumber)operands.get(1)).floatValue();


            PdfDictionary fontsDictionary = processor.resources.getAsDict(PdfName.FONT);
            CMapAwareDocumentFont font = new CMapAwareDocumentFont((PRIndirectReference)fontsDictionary.get(fontResourceName));


            processor.gs().font = font;
            processor.gs().fontSize = size;


        }

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     */
    private static class ProcessGraphicsStateResource implements ContentOperator{
        public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {


            PdfName dictionaryName = (PdfName)operands.get(0);
            PdfDictionary extGState = processor.resources.getAsDict(PdfName.EXTGSTATE);
            if (extGState == null)
                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("resources.do.not.contain.extgstate.entry.unable.to.process.operator.1", operator));
            PdfDictionary gsDic = extGState.getAsDict(dictionaryName);
            if (gsDic == null)
                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("1.is.an.unknown.graphics.state.dictionary", dictionaryName));


            // at this point, all we care about is the FONT entry in the GS dictionary
            PdfArray fontParameter = gsDic.getAsArray(PdfName.FONT);
            if (fontParameter != null){
                CMapAwareDocumentFont font = new CMapAwareDocumentFont((PRIndirectReference)fontParameter.getPdfObject(0));
                float size = fontParameter.getAsNumber(1).floatValue();


                processor.gs().font = font;

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    private static class BeginMarkedContent implements ContentOperator{


    public void invoke(PdfContentStreamProcessor processor,
        PdfLiteral operator, ArrayList<PdfObject> operands)
        throws Exception {
      processor.beginMarkedContent((PdfName)operands.get(0), new PdfDictionary());
    }

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     */
    private static class FormXObjectDoHandler implements XObjectDoHandler{


        public void handleXObject(PdfContentStreamProcessor processor, PdfStream stream, PdfIndirectReference ref) {
            
            final PdfDictionary resources = stream.getAsDict(PdfName.RESOURCES);


            // we read the content bytes up here so if it fails we don't leave the graphics state stack corrupted
            // this is probably not necessary (if we fail on this, probably the entire content stream processing
            // operation should be rejected
            byte[] contentBytes;

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        colorspace.add(PdfName.DEVICERGB);
        byte np[] = getPalette(paletteEntries);
        int len = np.length;
        colorspace.add(new PdfNumber(len / 3 - 1));
        colorspace.add(new PdfString(np));
        PdfDictionary ad = new PdfDictionary();
        ad.put(PdfName.COLORSPACE, colorspace);
        img.setAdditional(ad);
        return img;
    }

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