Re: Wrapping Long Text Without Spaces

2007-04-06 Thread Andreas L Delmelle

On Apr 6, 2007, at 14:58, Vincent Hennebert wrote:

Hi Jeff / Vincent,



- or you enable hyphenation and use ZWSP instead of the regular hyphen
  character. Thus FOP will break inside words that it is able to
  hyphenate; if they aren't normal English words this may not work  
well

  and you may prefer the first method.


IIRC, this is not entirely correct: with hyphenation turned FOP will  
always hyphenate words, period. AFAIK, there is no situation where  
FOP wouldn't be able to hyphenate. Using the hyphenation patterns,  
you can only indicate that certain hyphenation points are  
undesirable, but you can never turn on hyphenation and do something  
magical to keep FOP from hyphenating.


So, IOW, there is no word that FOP won't be able to hyphenate.


Cheers,

Andreas


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Re: Wrapping Long Text Without Spaces

2007-04-06 Thread Vincent Hennebert
Hi Jeff,

Jeff Vannest a écrit :
>> Just FYI: the other known workaround (which fits some scenarios  
>> better than inserting ZWSPs) would be to activate hyphenation, and  
>> use a ZWSP as hyphenation-character... In that case, FOP will
> 
> This is new to me, so let me see if I understand: A ZWSP is implicit between
> characters. For example, the word "CAT" would contain three characters and
> two ZWSP: C-ZWSP-A-ZWSP-T. Setting hyphenation to ZWSP would allow wrapping
> as:


Not exactly, in fact the two methods will lead to different results:
- either you manually put ZWSP after underscores in your words, which
  allow FOP to break words after them;
- or you enable hyphenation and use ZWSP instead of the regular hyphen
  character. Thus FOP will break inside words that it is able to
  hyphenate; if they aren't normal English words this may not work well
  and you may prefer the first method.


HTH,
Vincent


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Re: Wrapping Long Text Without Spaces

2007-04-06 Thread Jeff Vannest
> Just FYI: the other known workaround (which fits some scenarios  
> better than inserting ZWSPs) would be to activate hyphenation, and  
> use a ZWSP as hyphenation-character... In that case, FOP will

This is new to me, so let me see if I understand: A ZWSP is implicit between
characters. For example, the word "CAT" would contain three characters and
two ZWSP: C-ZWSP-A-ZWSP-T. Setting hyphenation to ZWSP would allow wrapping
as:

CA
T

...or...

C
AT

I think this sounds like the solution to use!

Jeff




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Re: Wrapping Long Text Without Spaces

2007-04-05 Thread Andreas L Delmelle

On Apr 5, 2007, at 14:45, Manuel Mall wrote:

Hi Jeff / Manuel,



Does FOP only wrap text on spaces? What I'm seeing is that text
placed in a cell will overrun the cell boundaries if the text does
not contain a space.



Assuming you are using the lastest FOP version instead of actually
modifying FOP you could make your stylesheet insert a zero width space
after each underscore as that would create a line break opportunity.


Just FYI: the other known workaround (which fits some scenarios  
better than inserting ZWSPs) would be to activate hyphenation, and  
use a ZWSP as hyphenation-character... In that case, FOP will  
ultimately always break the words if they don't fit the available space.


Note that you do need the hyphenation patterns from OFFO, in that  
case, as described here:

http://xmlgraphics.apache.org/fop/0.93/hyphenation.html

Cheers,

Andreas

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Re: Wrapping Long Text Without Spaces

2007-04-05 Thread Manuel Mall
On Thursday 05 April 2007 20:32, Jeff Vannest wrote:

Assuming you are using the lastest FOP version instead of actually 
modifying FOP you could make your stylesheet insert a zero width space 
after each underscore as that would create a line break opportunity.

Manuel

> Does FOP only wrap text on spaces? What I'm seeing is that text
> placed in a cell will overrun the cell boundaries if the text does
> not contain a space.
>
> I've attached a PNG showing the symptom. The example contains four
> cells (with four column headings) each containing boundary text as
> follows:
>
> Method: COA BOUNDARY_METHOD 01MAR_ABCDEFGHIJ_END
> Operation: COA BOUNDARY_OP 01MAR_ABCDEFGHIJKLMN_END
> Procedure: N/A
> Component: COA BOUNDARY_COMP 01MAR_ABCDEFGHIJKL_END
>
> Because certain sections of text are very long without spaces, and
> because no hyphenation support is configured, the text starts to
> overrun cell boundaries.
>
>
> Analysis of Example
> 
>
> The Method cell correctly wraps after "COA ". However, I'm guessing
> that "BOUNDARY_METHOD" is too wide for the cell, so wrapping stops,
> and instead "BOUNDARY_METHOD 01MAR_ABCDEFGHIJ_END" is simply printed
> non-stop across the first 3 columns.
>
> The Operation cell has a problem. I assume that this cell knows that
> it cannot wrap because the Method cell already consumes this space,
> so it simply writes all text across columns 2-4.
>
> The Procedure cell prints "N/A" as it should, but it is already
> obscured by the Operation overflow text.
>
> The Component cell prints and wraps correctly, but is partially
> obscured by the Operation overflow text.
>
>
> Hyphenation
> ===
> Why not enable hyphenation support? Good question, with hopefully, a
> good answer: Our implementation will be writing chemical and
> scientific data, and I assume that they hyphenation patterns will not
> 1) support scientific names without ongoing tweaking for every new
> chemical name added, and 2) be preferred by our readers, who are very
> particular that data appear unaltered.
>
> In our previous solution using Oracle Reports, long words were simply
> broken across lines. For example, if the text "COA BOUNDARY_METHOD"
> did not fit into a single cell, it might hard-break the text as
>
> COA BOUNDARY_ME
> THOD
>
> This is suitable to our readers, since it represents no artificial
> modification of the name (no hyphenation), and it does not obscure
> data in cells to the right.
>
>
> Questions
> =
>
> Sooo.
>
> 1) Can FOP be configured to wrap on characters other than space? Like
> underscore, for example? This would decrease the occurrence of the
> problem.
>
> 2) If I were to modify the FOP code to hard-break words when no space
> is found, where would that modification occur? (I assume this support
> would be "turned on" in the configuration file or whatever.)
>
> Thanks for your thoughts in advance, and for all the hard work you do
> on FOP!
>
> Jeff

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Wrapping Long Text Without Spaces

2007-04-05 Thread Jeff Vannest
Does FOP only wrap text on spaces? What I'm seeing is that text placed in a
cell will overrun the cell boundaries if the text does not contain a space.

I've attached a PNG showing the symptom. The example contains four cells
(with four column headings) each containing boundary text as follows:

Method: COA BOUNDARY_METHOD 01MAR_ABCDEFGHIJ_END
Operation: COA BOUNDARY_OP 01MAR_ABCDEFGHIJKLMN_END
Procedure: N/A
Component: COA BOUNDARY_COMP 01MAR_ABCDEFGHIJKL_END

Because certain sections of text are very long without spaces, and because
no hyphenation support is configured, the text starts to overrun cell
boundaries.


Analysis of Example


The Method cell correctly wraps after "COA ". However, I'm guessing that
"BOUNDARY_METHOD" is too wide for the cell, so wrapping stops, and instead
"BOUNDARY_METHOD 01MAR_ABCDEFGHIJ_END" is simply printed non-stop across the
first 3 columns.

The Operation cell has a problem. I assume that this cell knows that it
cannot wrap because the Method cell already consumes this space, so it
simply writes all text across columns 2-4.

The Procedure cell prints "N/A" as it should, but it is already obscured by
the Operation overflow text.

The Component cell prints and wraps correctly, but is partially obscured by
the Operation overflow text.


Hyphenation
===
Why not enable hyphenation support? Good question, with hopefully, a good
answer: Our implementation will be writing chemical and scientific data, and
I assume that they hyphenation patterns will not 1) support scientific names
without ongoing tweaking for every new chemical name added, and 2) be
preferred by our readers, who are very particular that data appear
unaltered.

In our previous solution using Oracle Reports, long words were simply broken
across lines. For example, if the text "COA BOUNDARY_METHOD" did not fit
into a single cell, it might hard-break the text as

COA BOUNDARY_ME
THOD

This is suitable to our readers, since it represents no artificial
modification of the name (no hyphenation), and it does not obscure data in
cells to the right.


Questions
=

Sooo.

1) Can FOP be configured to wrap on characters other than space? Like
underscore, for example? This would decrease the occurrence of the problem.

2) If I were to modify the FOP code to hard-break words when no space is
found, where would that modification occur? (I assume this support would be
"turned on" in the configuration file or whatever.)

Thanks for your thoughts in advance, and for all the hard work you do on
FOP!

Jeff



boundary.png
Description: PNG image
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