OK, although I would NOT dispute that what I'm doing is still "dangerous", and am still open to alternative-suggestions, I found my issue for this particular test:
When using the tokeniser, PdfContentParser and PdfLiteral methods to parse the original stream (akin to the sample OCGParser.java), the parenthesis were removed from around the text literal-string. Until I flipped back and forth with RUPS to view the stream of the original and the "edited" version, I totally missed that the parenthesis were missing, so the PDF content was there, but the text was basically not. I added the parenthesis back to the "Tj" operators' operand, and it all came back fine. I still don't know how to remove metadata (versus add it with setMoreInfo), and I agree that this is not the best way to do this re-add of content. I think adding it to the "over-content" is probably the best idea, but I have to figure out how to parse the font and location info for the text block, and am starting to peruse the PDF Reference Spec now. Thanks again, AJ On 2/22/2012 9:12 AM, AJ Weber wrote: > I'm trying to append some content > directly to the page's existing content-stream (it's already formatted > with the correct operators& operands, because I removed it previously). > >> What makes you think this will result in valid PDF syntax? > Because I removed the exact block of PDF syntax from the stream in a > previous step (and although it could be different, in this particular > case, it was the last part of the Contents stream, so it's putting it > back exactly where it was). > >>> Not only is the updated content not being written, >> Maybe it is written, but not visible when you open the file in Adobe Reader. > You are right here. I checked the document with RUPS, and the stream > has the additional block restored to the end of it, but it is not being > displayed. I'm unclear why that is, since, like I said, it's identical > to what I originally removed, and in this case, it's in the exact same > location of the stream. > >> What is ipText? Is it valid PDF syntax? Isn't it extremely dangerous >> to append a snippet of PDF syntax like this? What are you trying to >> achieve? > It's the block of text extracted from the Contents stream in a previous > step, exactly as it was in the Contents stream (it's a text block > starting with BT and ending with ET). I needed a temporary place to > store it with the document; I considered creating an XObject and putting > it there, but it would not be referenced in the temporary PDF file, and > I was theorizing it could be stripped-out during an optimization, plus I > didn't see a way to add the raw PDF syntax with the iText methods. > >> Aha, docinfo is a dictionary. More specifically: metadata. >> You're using a method to add more metadata in an attempt to remove >> metadata... >> Also: you are adding some existing metadata to the content stream of a page. > Is there a method to remove metadata from a document (instead of > setMoreInfo? ). > Yes, the metadata "value" is, as I mentioned, already valid PDF syntax, > because I stored it there in a previous step. >> I have no clue about what you're trying to achieve. >> I only have an opinion: what you're doing is dangerous. I wouldn't do it. > I appreciate your advice (very much). My only other option would be to > insert the text back on the document using getOverContent (I guess), but > I would have to fully parse the text block (BT...ET) so I could > understand setting the font, location, text, etc. I thought extracting > the block and re-inserting it exactly as it was would save me that trouble. > > ------------------------------------------------------------------------------ > Virtualization& Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > iText-questions mailing list > iText-questions@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/itext-questions > > iText(R) is a registered trademark of 1T3XT BVBA. > Many questions posted to this list can (and will) be answered with a > reference to the iText book: http://www.itextpdf.com/book/ > Please check the keywords list before you ask for examples: > http://itextpdf.com/themes/keywords.php ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
