Example usage for com.lowagie.text.pdf PdfReader getPdfObject

Introduction

In this page you can find the example usage for com.lowagie.text.pdf PdfReader getPdfObject.

Prototype

public PdfObject getPdfObject(int idx) 

Source Link

Usage

From source file:questions.images.ResizeImage.java

public static void resizeImagesInPage(PdfReader reader, int page, float factor) throws IOException {
    PdfDictionary pageDictionary = reader.getPageN(page);
    PdfDictionary resources = (PdfDictionary) PdfReader.getPdfObject(pageDictionary.get(PdfName.RESOURCES));
    PdfDictionary xobjects = (PdfDictionary) PdfReader.getPdfObject(resources.get(PdfName.XOBJECT));
    if (xobjects != null) {
        for (Object xObjectKey : xobjects.getKeys()) {
            PdfName xobjectName = (PdfName) xObjectKey;
            PdfObject xobj = xobjects.get(xobjectName);
            PRStream imageStream = (PRStream) PdfReader.getPdfObject(xobj);
            PdfName subtype = (PdfName) PdfReader.getPdfObject(imageStream.get(PdfName.SUBTYPE));
            PdfName filter = (PdfName) PdfReader.getPdfObject(imageStream.get(PdfName.FILTER));
            if (PdfName.IMAGE.equals(subtype) && PdfName.DCTDECODE.equals(filter)) {
                BufferedImage src = ImageIO
                        .read(new ByteArrayInputStream(PdfReader.getStreamBytesRaw(imageStream)));
                int width = (int) (src.getWidth() * factor);
                int height = (int) (src.getHeight() * factor);
                BufferedImage dest = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                AffineTransform at = AffineTransform.getScaleInstance(factor, factor);
                Graphics2D g = dest.createGraphics();
                g.drawRenderedImage(src, at);
                ByteArrayOutputStream newImage = new ByteArrayOutputStream();
                ImageIO.write(dest, "JPG", newImage);
                imageStream.setData(newImage.toByteArray(), false, PRStream.NO_COMPRESSION);
                imageStream.put(PdfName.WIDTH, new PdfNumber(width));
                imageStream.put(PdfName.HEIGHT, new PdfNumber(height));
                imageStream.put(PdfName.FILTER, PdfName.DCTDECODE);
            }//from w  w  w .  ja va2 s . c  o  m
        }
    }
}

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From source file:questions.javascript.AddJavaScriptToForm.java

public static void addJavaScript(String input, String output) throws IOException, DocumentException {
    PdfReader reader = new PdfReader(input);
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(output));
    stamper.getWriter()//from   w w  w .  ja v a 2 s . c o  m
            .addJavaScript("function setReadOnly(readonly) {" + "var partner = this.getField('partner');"
                    + "if(readonly) {" + "partner.value = '';" + "}" + "partner.readonly = readonly;" + " }"
                    + "function validate() {" + "var married = this.getField('married');"
                    + "var partner = this.getField('partner');"
                    + "if (married.value == 'yes' && partner.value == '') {"
                    + "app.alert('please enter the name of your partner');" + "}" + "else {"
                    + "this.submitForm({" + " cURL:\"http://1t3xt.info/examples/request.php\","
                    + " cSubmitAs: \"HTML\"" + "});" + "}" + " }");
    AcroFields form = stamper.getAcroFields();
    Item fd = form.getFieldItem("married");

    PdfDictionary dictYes = (PdfDictionary) PdfReader.getPdfObject((PdfObject) fd.getWidgetRef(0));
    PdfDictionary yesAction = dictYes.getAsDict(PdfName.AA);
    if (yesAction == null)
        yesAction = new PdfDictionary();
    yesAction.put(new PdfName("Fo"), PdfAction.javaScript("setReadOnly(false);", stamper.getWriter()));
    dictYes.put(PdfName.AA, yesAction);

    PdfDictionary dictNo = (PdfDictionary) PdfReader.getPdfObject((PdfObject) fd.getWidgetRef(1));
    PdfDictionary noAction = dictNo.getAsDict(PdfName.AA);
    if (noAction == null)
        noAction = new PdfDictionary();
    noAction.put(new PdfName("Fo"), PdfAction.javaScript("setReadOnly(true);", stamper.getWriter()));
    dictNo.put(PdfName.AA, noAction);

    PdfWriter writer = stamper.getWriter();
    PushbuttonField button = new PushbuttonField(writer, new Rectangle(40, 690, 200, 710), "submit");
    button.setText("validate and submit");
    button.setOptions(PushbuttonField.VISIBLE_BUT_DOES_NOT_PRINT);
    PdfFormField validateAndSubmit = button.getField();
    validateAndSubmit.setAction(PdfAction.javaScript("validate();", stamper.getWriter()));
    stamper.addAnnotation(validateAndSubmit, 1);

    stamper.close();
}

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From source file:questions.metadata.ReplaceXMP.java

public static void alterXmp1() {
    try {/*from  w w w .j  a  va  2 s  .  c  o m*/
        PdfReader reader = new PdfReader(ORIGINAL);
        PdfDictionary catalog = reader.getCatalog();
        PdfObject obj = catalog.get(PdfName.METADATA);
        PRStream stream = (PRStream) PdfReader.getPdfObject(obj);
        String metadata = new String(PdfReader.getStreamBytes(stream));
        metadata = metadata.replaceAll("Hello World", "Hello Universe");
        stream.setData(metadata.getBytes(), false);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(RESULT1));
        stamper.close();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (DocumentException e) {
        e.printStackTrace();
    }
}

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