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Posted to fop-users@xmlgraphics.apache.org by Johannes Künsebeck <hn...@gmx.de> on 2006/03/07 20:37:53 UTC
alternatives to floats in fop
Hi,
I try to build a complex design with fop, the design-template can be
seen here :
http://yucca-net.de/data/gild.pdf
After toying around with fop, I'm not sure if it is possible to realize
this design with fop.
I got alternating page-masters and the background-design working.
I can format a fo:block with the design for the even page, I can format
a fo:block with the design for the odd page, but I can't specify when to
use which (the problem you can't see in the template is that it must be
possible to put two or more workshops on one page).
My thoughts so far (not very far):
- use float="inside|outside" (XSL1.1) but that's not supported in fop
- put date and time infos in region-start/end, but how can I synchronize
startpositions with the flow?
So my questions are
- Do you think it is possible to realize this with XSLT-FO (& maybe
extensions)
- Do you think it is possible to realize this with fop?
- If yes, what do I have to read, to get it working
thanks in advance, Hann*
*
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Re: alternatives to floats in fop
Posted by Jeremias Maerki <de...@jeremias-maerki.ch>.
I don't think that works in Johannes' case since you can't account for
the left/right pages (inside/outside).
On 21.03.2006 10:47:52 Joachim Pfaff wrote:
> Hello Johannes,
>
> I read this thread and wondered if there is no other way. I don't
> like it to interrupt the fo-rendering, doing some stuff and then keep
>
> on going ;)
>
> Now it turned out, that i had to create a very simple list. During
> studying the definition of Formating Objects for Lists [1] i asked
> myself if this would not be a much more 'nicer' way in creating what
> you want to.
>
> As the compliance-page [2] indicates, all needed objects are
> implemented.
>
> What do you, and what does Jeremias think about this way?
>
> Greetings,
>
> Joachim
>
> [1] http://www.w3.org/TR/xsl/slice6.html#section-N17076-Formatting-
> Objects-for-Lists
> [2] http://xmlgraphics.apache.org/fop/compliance.html#fo-object-list-
> section
>
>
> On 20 Mar 2006 at 14:42, Johannes Künsebeck wrote:
>
> > Thank you Jeremias, that's the solution!
> > This "2-pass"-approach is very cool, I can't imagine designs that aren't
> > possible with it.
> > If you can't wait for XSL-FO2.0, use this as a hack for "layout-driven"
> > documents.
> > I just summarize it for the list, because I think it can be helpful in
> > other situations, too.
> > [...]
Jeremias Maerki
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Re: alternatives to floats in fop
Posted by Joachim Pfaff <Jo...@gmx.net>.
Hello Johannes,
I read this thread and wondered if there is no other way. I don't
like it to interrupt the fo-rendering, doing some stuff and then keep
on going ;)
Now it turned out, that i had to create a very simple list. During
studying the definition of Formating Objects for Lists [1] i asked
myself if this would not be a much more 'nicer' way in creating what
you want to.
As the compliance-page [2] indicates, all needed objects are
implemented.
What do you, and what does Jeremias think about this way?
Greetings,
Joachim
[1] http://www.w3.org/TR/xsl/slice6.html#section-N17076-Formatting-
Objects-for-Lists
[2] http://xmlgraphics.apache.org/fop/compliance.html#fo-object-list-
section
On 20 Mar 2006 at 14:42, Johannes Künsebeck wrote:
> Thank you Jeremias, that's the solution!
> This "2-pass"-approach is very cool, I can't imagine designs that aren't
> possible with it.
> If you can't wait for XSL-FO2.0, use this as a hack for "layout-driven"
> documents.
> I just summarize it for the list, because I think it can be helpful in
> other situations, too.
> [...]
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Re: alternatives to floats in fop
Posted by Johannes Künsebeck <hn...@gmx.de>.
Thank you Jeremias, that's the solution!
This "2-pass"-approach is very cool, I can't imagine designs that aren't
possible with it.
If you can't wait for XSL-FO2.0, use this as a hack for "layout-driven"
documents.
I just summarize it for the list, because I think it can be helpful in
other situations, too.
1. first pass: render your content elements (like you want them to
appear) to a areatree
"fop ... - out application/X-fop-areatree outfile.at"
(don't forget to to include your fonts in the fop.conf for the
areatree-renderer, too). Give your content elements an id, so you later
know where they have been rendered to.
2. write a XSL that extracts the information about position, sizes,
number of elements per page, whatever. In my boring example it's just
retrieving the side of a page, but you can retrieve any data that is
known to fop.
...
<xsl:template match="areaTree/pageSequence/pageViewport">
<xsl:variable name="nr" select="@nr"></xsl:variable><!-- get
page-number -->
<xsl:variable name="page_format">
<xsl:choose>
<xsl:when test="number($nr) mod 2 = 0">left</xsl:when>
<xsl:when test="number($nr) mod 2 = 1">right</xsl:when>
</xsl:choose>
</xsl:variable>
<page nr="{$nr}" format="{$page_format}">
<xsl:apply-templates
select="page/regionViewport/regionBody/mainReference/span/flow/block" />
</page>
</xsl:template>
<xsl:template
match="page/regionViewport/regionBody/mainReference/span/flow/block">
<xsl:variable name="id" select="@prod-id"></xsl:variable>
<!-- the id is passed to areatree as @prod-id, you need it later -->
<workshop_ref id='{$id}' />
</xsl:template>
...
-> save output in structure.xml
If you're a genius (I'm not), you can skip step 2. and do it directly in 3.
3. second pass: use the information in the second pass-stylesheet. You
have to pass the context you're working in or you will be stuck in the
included document.
...
<fo:flow flow-name="xsl-region-body">
<xsl:apply-templates
select="document('structure.xml')/pages/page/workshop_ref">
<xsl:with-param name="context" select="." /><!-- keep
context -->
</xsl:apply-templates>
</fo:flow>
...
<xsl:template match="workshop_ref">
<xsl:param name="context"></xsl:param>
<xsl:variable name="id" select="@id" />
<xsl:choose>
<!-- now i know which side I'm on -->
<xsl:when test="../@format='left'"><xsl:apply-templates
select="$context/workshop[@id=$id]" mode="left" /></xsl:when>
<xsl:when test="../@format='right'"><xsl:apply-templates
select="$context/workshop[@id=$id]" mode="right" /></xsl:when>
</xsl:choose
</xsl:template>
4. That's it. I hope even if the example isn't very exciting, you see
the power behind this.
cons: It doubles your rendering time, you have a complicated
workflow (automate it with ant), you have to write several stylesheets.
pros: you can do things you can't do with standard XSL-FO.
I hope I'm not spamming here, but I was happy getting this done.
Thanks Jeremias, for this cool idea.
Hannes
Jeremias Maerki wrote:
> On 07.03.2006 20:37:53 Johannes Künsebeck wrote:
>
>> Hi,
>> I try to build a complex design with fop, the design-template can be
>> seen here :
>>
>> http://yucca-net.de/data/gild.pdf
>>
>> After toying around with fop, I'm not sure if it is possible to realize
>> this design with fop.
>> I got alternating page-masters and the background-design working.
>> I can format a fo:block with the design for the even page, I can format
>> a fo:block with the design for the odd page, but I can't specify when to
>> use which (the problem you can't see in the template is that it must be
>> possible to put two or more workshops on one page).
>>
>> My thoughts so far (not very far):
>> - use float="inside|outside" (XSL1.1) but that's not supported in fop
>>
>
> Right. That would probably have been the best approach if it were
> implemented.
>
>
>> - put date and time infos in region-start/end, but how can I synchronize
>> startpositions with the flow?
>>
>
> You can't. Not with multiple workshops on one page.
>
>
>> So my questions are
>> - Do you think it is possible to realize this with XSLT-FO (& maybe
>> extensions)
>>
>
> Yes, I think so.
>
>
>> - Do you think it is possible to realize this with fop?
>>
>
> Not without difficulties. If you can restrict to one workshop per page,
> it's easy. If you want to have multiple workshops you will probably need
> to do a detour. Just an idea: Render the text for the individual
> workshops using a special reduced XSLT using the area tree XML renderer
> with the latest FOP version. You can then determine the height of each
> workshop from the generated XML format. Based on that knowledge you can
> define the distribution of the individual workshops yourself and put one
> page per page-sequence so you can control yourself whether you have a
> left or a right page. Then put the time info in a table together with
> the workshop info, either on the left or right side.
>
> I haven't tried but you may be able to emulate side floats using
> absolutely positioned block-containers with the latest FOP release.
>
>
>> - If yes, what do I have to read, to get it working
>> thanks in advance, Hann*
>> *
>>
>
> Good luck!
>
> Jeremias Maerki
>
>
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> To unsubscribe, e-mail: fop-users-unsubscribe@xmlgraphics.apache.org
> For additional commands, e-mail: fop-users-help@xmlgraphics.apache.org
>
>
>
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Re: alternatives to floats in fop
Posted by Jeremias Maerki <de...@jeremias-maerki.ch>.
On 07.03.2006 20:37:53 Johannes Künsebeck wrote:
> Hi,
> I try to build a complex design with fop, the design-template can be
> seen here :
>
> http://yucca-net.de/data/gild.pdf
>
> After toying around with fop, I'm not sure if it is possible to realize
> this design with fop.
> I got alternating page-masters and the background-design working.
> I can format a fo:block with the design for the even page, I can format
> a fo:block with the design for the odd page, but I can't specify when to
> use which (the problem you can't see in the template is that it must be
> possible to put two or more workshops on one page).
>
> My thoughts so far (not very far):
> - use float="inside|outside" (XSL1.1) but that's not supported in fop
Right. That would probably have been the best approach if it were
implemented.
> - put date and time infos in region-start/end, but how can I synchronize
> startpositions with the flow?
You can't. Not with multiple workshops on one page.
> So my questions are
> - Do you think it is possible to realize this with XSLT-FO (& maybe
> extensions)
Yes, I think so.
> - Do you think it is possible to realize this with fop?
Not without difficulties. If you can restrict to one workshop per page,
it's easy. If you want to have multiple workshops you will probably need
to do a detour. Just an idea: Render the text for the individual
workshops using a special reduced XSLT using the area tree XML renderer
with the latest FOP version. You can then determine the height of each
workshop from the generated XML format. Based on that knowledge you can
define the distribution of the individual workshops yourself and put one
page per page-sequence so you can control yourself whether you have a
left or a right page. Then put the time info in a table together with
the workshop info, either on the left or right side.
I haven't tried but you may be able to emulate side floats using
absolutely positioned block-containers with the latest FOP release.
> - If yes, what do I have to read, to get it working
> thanks in advance, Hann*
> *
Good luck!
Jeremias Maerki
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