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From Kelly Campbell <c...@channelpoint.com>
Subject RE: BUG : <fo:block> & area calculations as a guess ...
Date Mon, 11 Dec 2000 21:37:00 GMT
I found the problem. It is caused by the changes in fo.flow.Block.layout()
added to fix infinite loops on tables. Here is a file that shows the
problem. At the end of page 3, there's a block of text that should start
with "4." and another block that starts on the next page. (Look for blocks
with id="block*" in this fo file). With the current cvs version of FOP,
block2.1 is not rendered on page 3, and block2.2 is rendered on page 4.

Reverting the code in that method of Block.java fixes the problem for this
case. I don't think it has anything to do with space-before properties, just
with the fact that if a block was partially laid out, the area isn't added
to the tree due to Hani Elabed's changes.


-----Original Message-----
From: Kelly Campbell [mailto:camk@camk.net]
Sent: Saturday, December 09, 2000 5:24 PM
To: fop-dev@xml.apache.org; fotis.jannidis@lrz.uni-muenchen.de
Subject: Re: BUG : <fo:block> & area calculations as a guess ...

Has anyone worked on this bug? I still seem to be running into it 
frequently. I will take a look at fixing it, but I wondered if anyone else 
had already found the fix for it.


On Sat, Dec 02, 2000 at 11:58:07AM +0100, Fotis Jannidis wrote:
> thanks for your clean bug report. 
> the problem seems to be: if a block, which is positioned with the 
> space-before attribute, doesn't fit on the current page, it gets lost. 
> (probably works with space-after also)
> Fotis
> Send reply to:  	fop-dev@xml.apache.org
> To:             	fop-dev@xml.apache.org
> Subject:        	BUG : <fo:block> & area calculations as a guess ...
> Date sent:      	Fri, 01 Dec 2000 13:35:14 -0800
> From:           	Rick Tessner <rick@dingle.myra.com>
> > Howdy All!
> > 
> > I've been using Norman Walsh's Docbook with Cocoon2 & latest FOP builds,
> > and I just noticed (don't know exactly when this started happening ...)
> > that some <fo:block> areas that get moved onto the next page
> > are just vanishing.
> > 
> > To try to narrow it down, I just took the FO generated via Cocoon2
> > and the Docbook XSL and then just used FOP on the CommandLine to
> > generate the PDF. I cleaned up the FO (indentation) and am including
> > it here as an attachment.
> > 
> > I'm using FOP 0.15, built as of today (December 1st) running under
> > Solaris 2.6 with SUN's JDK 1.2.2.
> > 
> > What's happening with the generated PDF is that the header that
> > should be appearing on top of page 2 (the header in question in the
> > FO attachment is "2. THIS HEADING DON'T SHOW UP!") doesn't.
> > 
> > I've been seeing a lot of discussion lately on area calculations etc
> > to do with table cells, images etc. and I'm wondering if something done
> > in that vein has had some impact other calculations as well ....
> > 
> > 

Kelly A. Campbell                        Software Engineer
camk@channelpoint.com                    Channelpoint, Inc.
camk@camk.net  camk@merlotxml.org        Colorado Springs, Co.

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