/** convenience method. Given an imported page, set our "globals" */
protected int setFromIPage(PdfImportedPage iPage) {
int pageNum = iPage.getPageNumber();
PdfReaderInstance inst = currentPdfReaderInstance = iPage.getPdfReaderInstance();
reader = inst.getReader();
setFromReader(reader);
return pageNum;
}
/**
* Gets the content stream of a page as a PdfStream object.
*
* @param pageNumber the page of which you want the stream
* @param compressionLevel the compression level you want to apply to the stream
* @return a PdfStream object
* @since 2.1.3 (the method already existed without param compressionLevel)
*/
PdfStream getFormXObject(int pageNumber, int compressionLevel) throws IOException {
PdfDictionary page = reader.getPageNRelease(pageNumber);
PdfObject contents = PdfReader.getPdfObjectRelease(page.get(PdfName.CONTENTS));
PdfDictionary dic = new PdfDictionary();
byte bout[] = null;
if (contents != null) {
if (contents.isStream()) dic.putAll((PRStream) contents);
else bout = reader.getPageContent(pageNumber, file);
} else bout = new byte[0];
dic.put(PdfName.RESOURCES, PdfReader.getPdfObjectRelease(page.get(PdfName.RESOURCES)));
dic.put(PdfName.TYPE, PdfName.XOBJECT);
dic.put(PdfName.SUBTYPE, PdfName.FORM);
PdfImportedPage impPage = (PdfImportedPage) importedPages.get(new Integer(pageNumber));
dic.put(PdfName.BBOX, new PdfRectangle(impPage.getBoundingBox()));
PdfArray matrix = impPage.getMatrix();
if (matrix == null) dic.put(PdfName.MATRIX, IDENTITYMATRIX);
else dic.put(PdfName.MATRIX, matrix);
dic.put(PdfName.FORMTYPE, ONE);
PRStream stream;
if (bout == null) {
stream = new PRStream((PRStream) contents, dic);
} else {
stream = new PRStream(reader, bout, compressionLevel);
stream.putAll(dic);
}
return stream;
}
void writeAllPages() throws IOException {
try {
file.reOpen();
for (Iterator it = importedPages.values().iterator(); it.hasNext(); ) {
PdfImportedPage ip = (PdfImportedPage) it.next();
writer.addToBody(
ip.getFormXObject(writer.getCompressionLevel()), ip.getIndirectReference());
}
writeAllVisited();
} finally {
try {
reader.close();
file.close();
} catch (Exception e) {
// Empty on purpose
}
}
}
/**
* Add an imported page to our output
*
* @param iPage an imported page
* @throws IOException, BadPdfFormatException
*/
public void addPage(PdfImportedPage iPage) throws IOException, BadPdfFormatException {
int pageNum = setFromIPage(iPage);
PdfDictionary thePage = reader.getPageN(pageNum);
PRIndirectReference origRef = reader.getPageOrigRef(pageNum);
reader.releasePage(pageNum);
RefKey key = new RefKey(origRef);
PdfIndirectReference pageRef;
IndirectReferences iRef = indirects.get(key);
if (iRef != null && !iRef.getCopied()) {
pageReferences.add(iRef.getRef());
iRef.setCopied();
}
pageRef = getCurrentPage();
if (iRef == null) {
iRef = new IndirectReferences(pageRef);
indirects.put(key, iRef);
}
iRef.setCopied();
PdfDictionary newPage = copyDictionary(thePage);
root.addPage(newPage);
iPage.setCopied();
++currentPageNumber;
}
/**
* Create a page stamp. New content and annotations, including new fields, are allowed. The fields
* added cannot have parents in another pages. This method modifies the PdfReader instance.
*
* <p>The general usage to stamp something in a page is:
*
* <p>
*
* <pre>
* PdfImportedPage page = copy.getImportedPage(reader, 1);
* PdfCopy.PageStamp ps = copy.createPageStamp(page);
* ps.addAnnotation(PdfAnnotation.createText(copy, new Rectangle(50, 180, 70, 200), "Hello", "No Thanks", true, "Comment"));
* PdfContentByte under = ps.getUnderContent();
* under.addImage(img);
* PdfContentByte over = ps.getOverContent();
* over.beginText();
* over.setFontAndSize(bf, 18);
* over.setTextMatrix(30, 30);
* over.showText("total page " + totalPage);
* over.endText();
* ps.alterContents();
* copy.addPage(page);
* </pre>
*
* @param iPage an imported page
* @return the <CODE>PageStamp</CODE>
*/
public PageStamp createPageStamp(PdfImportedPage iPage) {
int pageNum = iPage.getPageNumber();
PdfReader reader = iPage.getPdfReaderInstance().getReader();
PdfDictionary pageN = reader.getPageN(pageNum);
return new PageStamp(reader, pageN, this);
}
