I do not know about the future of the TXTRenderer. But I do know a little
bit about it's past.

The overwrite problem occurs because the TXTRenderer attempts to match the
positioning/layout of the PDF/PCL Renderers. Unfortunately plain text of
course does not have precise line positioning. Essentially the TXTRenderer
attempts to fit the layout onto a fixed character matrix. Quantization
effects cause the overwrite when a subsequent line ends up at the same line
in the matrix as a previous line. I do not know that there is a perfect
solution to this problem. Perhaps extra lines could be added if an overwrite
would occur, but then the layout would be compromised (perhaps this would be
better than an overwrite). One of the original constraints when the
TXTRenderer was developed was that the text output fit within fixed page
sizes (fixed number of rows/columns). Depending on your application, this
may not be important. Perhaps a "mode" could be added to preserve text
(versus preserving layout). The only consolation I have had with regard to
the TXTRenderer is that I find its output superior to many commercial
applications' lame text output (IMHO).

Art

-----Original Message-----
From: Illiano, Vincent [mailto:[EMAIL PROTECTED] 
Sent: Monday, June 16, 2003 2:28 PM
To: Illiano, Vincent
Cc: '[EMAIL PROTECTED]'
Subject: Ascii file generation questions


> Hi fellow Fop'ers,
> 
> I've built a dynamic document generation system using FOP.  I'm 
> currently using version 0.20.4.  The 2 supported output formats are 
> PDF and ASCII text.  I know that the ASCII renderer was never meant to 
> be production quality.  However, with some tweaking, I have been able 
> to get out of it what I need.  I'm including an example text output 
> file that was generated by my system using FOP.
> 
> The main problem that I have found with the text output generation is 
> the line-overwriting problem.  However, I have been able to fix this 
> for the most part by adding extra space before the blocks where the 
> overwriting occurs.  For example:
> 
> change
>       <fo:block>Procedure Comment</fo:block>
> to
>       <fo:block space-before="10.5pt">Procedure Comment</fo:block>
> 
> often fixes the overwriting problem that may occur in a particular 
> paragraph of text.
> 
> Is there someone on this list who can explain to me why the 
> overwriting problem occurs and if it's something that could be fixed?  
> I can volunteer to dig in and do it myself with just a little 
> guidance.  Also, is the text output feature planned in the redesign?  
> I really hope so, because I think text is a valid output format.  
> Again, I can volunteer to work on that feature if it's not already in 
> the plan.
> 
> Here is the example text file.  Thanks, -Vincent
> 
>  <<vreport.txt>>
> 

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