A BT without a matching ET is an error. If you have any other operators than
those allowed inside BT/ET, it's an error.
Leonard
From: Mark Storer [mailto:msto...@autonomy.com]
Sent: Monday, August 30, 2010 2:17 PM
To: Post all your questions about iText here
Subject: Re: [iText-questions] Error: Unbalanced begin/end
textoperatorssinceiText 5
Somewhere in your program, you've always had an unbalanced number of BT/ET
pairs. If you take one of your old PDFs (that was built by the older
iTextSharp) and run it through Acrobat Pro's syntax checker, you'll find you
have a problem. Adobe's smart enough to Figure It Out, but there are quite a
few other PDF viewers floating around these days that are not.
That's why I added the code to catch the unbalanced pairs, and why the rest of
the team agreed that it was a good idea. IIRC, the same sort of error is
thrown with unbalanced q/Q pairs, though the verbage may be different...
And now I can't find where I put the check for BT/ET...
Ah yes... sanityCheck(). And because it's throwing during a newPage(), that
means you have a BT without an ET somewhere in your page's text stream. Not in
the direct content, and changing that won't affect the text ContentByte one way
or the other.
It's technically possible that we are throwing in error. For Example:
q
BT
(blah)Tj
Q
I'm not sure how the PDF spec handles this Weird Case, or even if it has
anything to say on the matter. Lets see...
"A text object begins with the BT operator and ends with the ET operator, as
shown in the Example, and described in Table 107. "
So the above content example is either illegal, or still inside a text object
after the Q. We're fiine... but there's some wiggle room here in the spec that
makes me uncomfortable. "Alarmed" even. Leonard, am I reading this right?
Text state is also kinda independant of the regular graphic state. Text
attributes within a BT/ET pair are local to that text object. BT/ET is kind of
text's version of q/Q. I would therefore hope that q BT Q parses as an
unclosed text object, but a retentive reading of the quoted line would make q
BT Q ET legal... like I said, "alarming". I'm poking around in the q/Q verbage
for something to support/reject this interpretation, to no avail.
These operators have been around since PDF 1.0... I'd be shocked if this
question hasn't come up before.
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
________________________________
From: Paulo Soares [mailto:psoa...@glintt.com]
Sent: Monday, August 30, 2010 9:16 AM
To: Post all your questions about iText here
Subject: Re: [iText-questions] Error: Unbalanced begin/end
textoperatorssinceiText 5
The only problem I can see here is that you are still ignoring the request for
a simple, complete, standalone example. I'm ok you that, it's your problem, not
mine.
Paulo
----- Original Message -----
From: alrts<mailto:edition-b...@swissonline.ch>
To:
itext-questions@lists.sourceforge.net<mailto:itext-questions@lists.sourceforge.net>
Sent: Monday, August 30, 2010 4:59 PM
Subject: Re: [iText-questions] Error: Unbalanced begin/end text
operatorssinceiText 5
Referring back to my first example with ColumnText(), the internal buffer of
the ColumnText ct reads just before the document is closed:
Canvas = {BT
1 0 0 1 163.67 479.06 Tm
/F1 26 Tf
(Astrologisches Porträt)Tj
ET
}
This looks pretty much ok, BT being short for BeginText(), then comes the
SetSimpleColumn(...), followed by the phrase (preceded by the chunk's font)
and ET for endText(). But, upon CloseDocument() the
Unbalanced begin/end text operators
error appears. Can anybody see a problem here ?
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