PDF Names are case sensitive - so Acrobat is behaving correctly and the
Chrome browser is being lenient (though not necessarily in a good way!)
Leonard
On 7/8/14, 9:25 AM, "Linda Briesemeister" <linda.briesemeis...@sri.com>
wrote:
>Hello,
>
>We are evaluating iText 5.5.1 for our needs and I came upon the following
>peculiarity. We want to generate a PDF that has layers (optional content
>groups or OCGs) where one layer is only shown when viewed in a reader and
>not when printed and the other layer is only shown when printed but not
>in online view.
>
>I worked from one of the iText examples and created the PDF with this
>code (just part to keep length of post short):
>...
> Document document = new Document();
> PdfWriter writer = PdfWriter.getInstance(document, new
>FileOutputStream(file));
> writer.setPdfVersion(PdfWriter.VERSION_1_5);
> document.open();
> PdfContentByte cb = writer.getDirectContent();
>
> // 1) generate only View:
> PdfLayer not_printed = new PdfLayer("not printed", writer);
> not_printed.setOnPanel(ON_PANEL);
> not_printed.setOn(true);
> not_printed.setPrint("Print", false);
> cb.beginLayer(not_printed);
> ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
> "ONLY IN VIEW"), 50, 600, 0);
> cb.endLayer();
>
> // 2) generate only Print:
> PdfLayer only_printed = new PdfLayer("only printed", writer);
> only_printed.setOnPanel(ON_PANEL);
> only_printed.setView(false);
> only_printed.setPrint("Print", true); // <- this turns out to be
>the culprit...
> cb.beginLayer(only_printed);
> ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
> "ONLY WHEN PRINTED"), 50, 400, 0);
> cb.endLayer();
>
> document.close();
>...
>
>This generates a PDF that has the two phrases "ONLY IN VIEW" and "ONLY
>WHEN PRINTED" at different locations on the first page. Opening the
>resulting PDF in Chrome browser, the first phrase shows and when clicking
>Print, the preview shows only the second phrase. This is what I had
>intended.
>
>Now opening the same PDF in Adobe Reader 11, the view is correct (only
>the first phrase shows) but when I click Print, the preview shows neither
>the second (his would be correct) nor the first (this would be incorrect)
>phrase -- the page is just blank. Poking around with the excellent RUPS
>tool (thank you!) and editing the PDF with Acrobat Pro, I realized that
>after Acrobat Pro, the /PrintState setting is /ON but iText originally
>generated the value /on -- it seems that Adobe Reader is case sensitive
>here! I used RUPS to edit the iText generated PDF as well and simply
>replaced /on with /ON for the /PrintState and -- voila -- Adobe Reader
>behaves as I would expect showing the second phrase in the print preview.
>
>A quick look into the class com.itextpdf.text.pdf.PdfName.ON reveals that
>the string is indeed lower case. However, the corresponding PdfName.OFF
>is upper case (and there is a PdfName.Off that is mixed case). I think
>our problem could be fixed by patching PdfName.ON to be instantiated with
>"ON" rather than "on" -- would this be of interest by iText? I'd b happy
>to provide more details, code, and even my little unit test that I wrote
>against it.
>
>>From browsing quickly through the code bases, I only see PdfName.ON used
>>in the context of OCGs, where the upper case might be the right way to
>>go.
>
>Thanks,
>Linda
>
>
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------------------------------------------------------------------------------
Open source business process management suite built on Java and Eclipse
Turn processes into business applications with Bonita BPM Community Edition
Quickly connect people, data, and systems into organized workflows
Winner of BOSSIE, CODIE, OW2 and Gartner awards
http://p.sf.net/sfu/Bonitasoft
_______________________________________________
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
