Example usage for com.itextpdf.text.pdf PdfStream getAsDict

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfStream getAsDict.

Prototype

public PdfDictionary getAsDict(final PdfName key) 

Source Link

Document

Returns a PdfObject as a PdfDictionary, resolving indirect references.

Usage

From source file:mkl.testarea.itext5.pdfcleanup.PdfCleanUpContentOperator.java

License:Open Source License

public void invoke(PdfContentStreamProcessor pdfContentStreamProcessor, PdfLiteral operator,
        ArrayList<PdfObject> operands) throws Exception {
    String operatorStr = operator.toString();
    PdfContentByte canvas = cleanUpStrategy.getContext().getCanvas();
    PRStream xFormStream = null;/*from  w w  w  . ja  va  2 s.  c o  m*/
    boolean disableOutput = pathConstructionOperators.contains(operatorStr)
            || pathPaintingOperators.contains(operatorStr) || clippingPathOperators.contains(operatorStr);
    GraphicsState gs = pdfContentStreamProcessor.gs();

    // key - number of a string in the TJ operator, value - number following the string; the first number without string (if it's presented) is stored under 0.
    // BE AWARE: zero-length strings are ignored!!!
    Map<Integer, Float> structuredTJoperands = null;

    if ("Do".equals(operatorStr)) {
        if (operands.size() == 2 && operands.get(0).isName()) {
            PdfDictionary xObjResources = cleanUpStrategy.getContext().getResources()
                    .getAsDict(PdfName.XOBJECT);

            if (xObjResources != null) {
                PdfStream xObj = xObjResources.getAsStream((PdfName) operands.get(0));

                if (xObj instanceof PRStream && xObj.getAsName(PdfName.SUBTYPE) != null
                        && xObj.getAsName(PdfName.SUBTYPE).compareTo(PdfName.FORM) == 0) {
                    xFormStream = (PRStream) xObj;
                    cleanUpStrategy.registerNewContext(xObj.getAsDict(PdfName.RESOURCES), null);
                }
            }
        }
    }

    originalContentOperator.invoke(pdfContentStreamProcessor, operator, operands);
    List<PdfCleanUpContentChunk> chunks = cleanUpStrategy.getChunks();

    if (xFormStream != null) {
        xFormStream.setData(cleanUpStrategy.getContext().getCanvas()
                .toPdf(cleanUpStrategy.getContext().getCanvas().getPdfWriter()));
        cleanUpStrategy.popContext();
        canvas = cleanUpStrategy.getContext().getCanvas();
    }

    if ("Do".equals(operatorStr)) {
        if (chunks.size() > 0 && chunks.get(0) instanceof PdfCleanUpContentChunk.Image) {
            PdfCleanUpContentChunk.Image chunk = (PdfCleanUpContentChunk.Image) chunks.get(0);

            if (chunk.isVisible()) {
                PdfDictionary xObjResources = cleanUpStrategy.getContext().getResources()
                        .getAsDict(PdfName.XOBJECT);
                PRStream imageStream = (PRStream) xObjResources.getAsStream((PdfName) operands.get(0));
                updateImageStream(imageStream, chunk.getNewImageData());
            } else {
                disableOutput = true;
            }
        }
    } else if (lineStyleOperators.contains(operatorStr)) {
        disableOutput = true;
    } else if (textShowingOperators.contains(operatorStr)
            && !allChunksAreVisible(cleanUpStrategy.getChunks())) {
        disableOutput = true;

        if ("'".equals(operatorStr)) {
            canvas.getInternalBuffer().append(TStar);
        } else if ("\"".equals(operatorStr)) {
            operands.get(0).toPdf(canvas.getPdfWriter(), canvas.getInternalBuffer());
            canvas.getInternalBuffer().append(Tw);

            operands.get(1).toPdf(canvas.getPdfWriter(), canvas.getInternalBuffer());
            canvas.getInternalBuffer().append(TcTStar);
        } else if ("TJ".equals(operatorStr)) {
            structuredTJoperands = structureTJarray((PdfArray) operands.get(0));
        }

        writeTextChunks(structuredTJoperands, chunks, canvas, gs.getCharacterSpacing(), gs.getWordSpacing(),
                gs.getFontSize(), gs.getHorizontalScaling());
    } else if (pathPaintingOperators.contains(operatorStr)) {
        writePath(operatorStr, canvas, gs.getColorSpaceStroke());
    } else if (strokeColorOperators.contains(operatorStr)) {
        // Replace current color with the new one.
        cleanUpStrategy.getContext().popStrokeColor();
        cleanUpStrategy.getContext().pushStrokeColor(operands);
    } else if ("q".equals(operatorStr)) {
        cleanUpStrategy.getContext().pushStrokeColor(cleanUpStrategy.getContext().peekStrokeColor());
    } else if ("Q".equals(operatorStr)) {
        cleanUpStrategy.getContext().popStrokeColor();
    }

    if (!disableOutput) {
        writeOperands(canvas, operands);
    }

    cleanUpStrategy.clearChunks();
}

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