FOP Bug or my mistable: Table Cell content string overflow?

[Yuan Yuan <yu...@gmail.com>]

Hi,

When I was using the FOP, I found the content string of the Table Cell
overflow all the time.

I have tried to find the solution in the Internet for few days. There are a
lot of explanations, but no directly solution.

I want to know if this is really a bug of FOP or just my mistake (or my
misunderstanding of the "overflow", "wrap-option" and "hyphenate"
attribute)?

Thanks!

Below is my FO xml code.

Please pay attention to this block:

 <fo:block-container hyphenate="true" wrap-option="wrap" overflow="scroll">
        <fo:block hyphenate="true" wrap-option="wrap" overflow="scroll">
         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        </fo:block>
</fo:block-container>
I really did what I can did for this problem...


<?xml version="1.0" encoding="utf-8" ?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
 <fo:layout-master-set>
  <fo:simple-page-master master-name="normal"
   page-height="29.7cm" page-width="21cm" margin-top="1cm"
   margin-bottom="1cm" margin-left="1.5cm" margin-right="1.5cm">
   <fo:region-body margin-top="1cm" margin-bottom="1cm" />
   <fo:region-after extent="0.7cm" />
  </fo:simple-page-master>
 </fo:layout-master-set>

 <fo:page-sequence master-reference="normal">
  <fo:flow flow-name="xsl-region-body">
   <fo:table table-layout="fixed" width="100%" border-collapse="collapse"
    border-width="0.2mm" border-style="solid" font-size="7pt">
    <fo:table-column column-width="30%" />
    <fo:table-column column-width="70%" />
    <fo:table-body>
     <fo:table-row>
      <fo:table-cell border-collapse="collapse"
       border-width="0.2mm" border-style="solid" padding="2pt">
       <fo:block-container hyphenate="true" wrap-option="wrap"
overflow="scroll">
        <fo:block hyphenate="true" wrap-option="wrap" overflow="scroll">
         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        </fo:block>
       </fo:block-container>
      </fo:table-cell>
      <fo:table-cell border-collapse="collapse"
       border-width="0.2mm" border-style="solid" padding="2pt">
       <fo:block-container hyphenate="true" wrap-option="wrap"
overflow="scroll">
        <fo:block hyphenate="true" wrap-option="wrap" overflow="scroll">
         =======================================================================================================
        </fo:block>
       </fo:block-container>
      </fo:table-cell>
     </fo:table-row>
    </fo:table-body>
   </fo:table>
  </fo:flow>
 </fo:page-sequence>
</fo:root>

Re: FOP Bug or my mistable: Table Cell content string overflow?

[Andreas Delmelle <an...@telenet.be>]

On 31 Dec 2008, at 02:13, Yuan Yuan wrote:

Hi

> When I was using the FOP, I found the content string of the Table  
> Cell overflow all the time.
>
> I have tried to find the solution in the Internet for few days.  
> There are a lot of explanations, but no directly solution.
>
> I want to know if this is really a bug of FOP or just my mistake (or  
> my misunderstanding of the "overflow", "wrap-option" and "hyphenate"  
> attribute)?

Well, there is the small matter of wrap-option="wrap". This does not / 
force/ line-wrapping, especially not in FOP. FOP uses Unicode TR14  
line-breaking rules, and Unicode does not allow breaking that long  
string of a's anywhere.

Normally, hyphenate="true" should be enough to achieve what you need,  
but I notice you do not specify a language anywhere, yielding a  
default of language="none".
I'm guessing FOP doesn't hyphenate because it does not get an  
indication of which hyphenation pattern to use here?
To properly activate hyphenation in FOP, check the following links:
http://xmlgraphics.apache.org/fop/0.95/hyphenation.html
http://offo.sourceforge.net/

Note that hyphenation will only take care of the string of a's (could  
be conceived as a 'word'). The string of ='s will still not be  
hyphenated, since it is not a word. The only way to force splitting  
those over multiple lines, at the moment, is to insert Zero-Width  
Spaces to allow FOP to insert breaks in there...


HTH!

Andreas

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