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Posted to batik-users@xmlgraphics.apache.org by Andrew Pietsch <ap...@optushome.com.au> on 2002/11/11 00:47:22 UTC
RE: Question about vertical-align in flowText extension
Hi again,
I've now decided I need this.. )c: I'm presuming the final
implementation is still someway off, so is there any change of adding it
(since you feel its easy) or pointing me in the right direction so I can
implement it?
Thanks
Andrew
On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote:
> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
>
> AP> Hi,I was wondering if the css vertical-align property is supported
> AP> (or planned) when using the flow text extension (i've tried a few
> AP> times and browsed the code so I'm guessing no).
>
> No, and eventually :)
>
> This is on hold pending decisions in the SVG WG. The
> implementation was done to get experience to feed back to the SVG WG.
> The WG is tring to sort out the details of how text wrapping will work
> - what features to support, what algs should be used, etc.
>
> AP> I'm using the cvs version (week or so old). I have a single flow
> AP> region and it would be nice (though not critical) to vertically
> AP> centre the text.
>
> This wouldn't be hard to implement for this case (or actually even
> for multiple flow regions), but I haven't bothered since everything is
> about to change anyway.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org
> For additional commands, e-mail: batik-users-help@xml.apache.org
>
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RE: Question about vertical-align in flowText extension
Posted by Thomas E Deweese <th...@kodak.com>.
>>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
AP> Well it seems to work. I did a *tiny* bit of refactoring (I'm
AP> using intellij) and renamed cRect currentRegion as well as the
AP> naming changes you suggested.
AP> I tried to run the test targets but they all failed due to missing
AP> classes, InternetAddress being one if I remember correctly. Is
AP> this normal?
Regard (our test tool) is tied into the java mail api's, so you
need to install the java mail standard extension to compile it.
http://java.sun.com/products/javamail/
AP> How would you like me to send you the changes?
The best way is the output of 'cvs diff -wu' on UNIX if you work
on windows I'm guessing there is something similar.
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RE: Question about vertical-align in flowText extension
Posted by Andrew Pietsch <ap...@optushome.com.au>.
Well it seems to work. I did a *tiny* bit of refactoring (I'm using
intellij) and renamed cRect currentRegion as well as the naming changes
you suggested.
I tried to run the test targets but they all failed due to missing
classes, InternetAddress being one if I remember correctly. Is this
normal?
How would you like me to send you the changes?
On Mon, 2002-11-18 at 23:25, Thomas E Deweese wrote:
> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
>
> AP> I've managed to get the rendering working (for the simple cases of
> AP> top, bottom and middle), but I'm a little unsure how to package
> AP> the align attribute in SVGFlowTextElementBridge. It seems to me
> AP> that the vertical-align attribute should belong to the
> AP> <batik:region> element, which is currently converted to a
> AP> Rectangle2D.
>
> Unfortunately, I can see arguments on both sides of this
> (horizontal alignment would then per-para but vertical alignment would
> be on regions), I tend to agree that vertical-align belongs on the
> region element (just be aware that in the end this is the sort of
> thing the SVG WG is likely to change).
>
> AP> I'm guessing that the list of rectangles produced (by
> AP> SVGFlowTextElementBridge.gatherRects) eventually ends up as the
> AP> list of flowRects passed to GlyphLayout.textWrapTextChunk() and
> AP> that I should be passing a RegionInfo class that holds the
> AP> rectangle and the alignment instead.
>
> AP> Sound ok?
>
> Sounds about right, BTW gatherRects is only called from one place
> which is where the rectangles are attached to the attributed string.
> So a simple change would be to change gatherRects to gatherRegionInfo,
> and have it return a list of RegionInfo objects. Similar small
> parallel changes on the other side should finish the job!
>
> Thanks, for doing this.
>
> AP> Cheers Andrew
>
> AP> On Wed, 2002-11-13 at 09:29, Andrew Pietsch wrote:
> >> Thanks for that, I'll give it a go.. (c:
> >>
> >> On Tue, 2002-11-12 at 00:33, Thomas E Deweese wrote: > >>>>> "AP"
> >> == Andrew Pietsch <ap...@optushome.com.au> writes:
> >> >
> >> > AP> I've now decided I need this.. )c:
> >> >
> >> > AP> I'm presuming the final implementation is still someway off,
> >> so is > AP> there any change of adding it (since you feel its easy)
> >> or > AP> pointing me in the right direction so I can implement it?
> >> >
> >> > I'll gadly point you in the right direction ;)
> >> >
> >> > All of text wrapping is done as a post-processing step in text >
> >> layout. That post-processing step has two parts, first it figures
> >> out > what needs to be on each line, then it positions all the
> >> glyphs.
> >> >
> >> > All this work is done in the two methods:
> >> >
> >> > // Does the line break determination >
> >> batik.gvt.text.GlyphLayout.textWrapTextChunk(....)
> >> >
> >> > // Does the glyph positioning >
> >> batik.gvt.text.GlyphLayout.layoutChunk(....)
> >> >
> >> > As textWrapTextChunk does it's work it adde LineInfo object to a
> >> > list, one for each line of text.
> >> >
> >> > What I would suggest is adding a vertical-align offset member to
> >> > the LineInfo class. This should be a Point2D.float. Use the
> >> same > Point2D.float for all lines in a single flowRect (the list
> >> of > flowRects is accessed from the 'flowRectsIter'). When we hit
> >> the end > of a flowRect (or of text), you can get the vertical size
> >> from 'dy' > (depending on the case you will need to figure in the
> >> current line's > size - search for 'bottomEdge') & the flow rect
> >> size from cRect.height > from this you can calculate the 'left
> >> over' space and put half of it > in the vertical-align Point2D's y
> >> value.
> >> >
> >> > Then in the layoutChunk method just add the vertical-align offset
> >> > in when calculating the correct lineLoc for the current line.
> >> >
> >> > ---
> >> >
> >> > You will also need to pass this information to the text-wrap
> >> stuff > from the source SVG. This is mostly done in the >
> >> batik.extension.svg.SVGFlowTextElementBridge class. You might look
> >> at > how the margin's are done (search for makeMarginInfo) or how
> >> the > FlowRegions are handleded (search for getRegions).
> >> >
> >> > ---
> >> >
> >> > Hope this helps, and good luck (if you get into it and have >
> >> specific questions feel free to post).
> >> >
> >> > AP> Thanks Andrew
> >> >
> >> > AP> On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote: > >>
> >> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
> >> > >>
> >> > AP> Hi,I was wondering if the css vertical-align property is
> >> supported > AP> (or planned) when using the flow text extension
> >> (i've tried a few > AP> times and browsed the code so I'm guessing
> >> no). > >> No, and eventually :)
> >> > >>
> >> > >> This is on hold pending decisions in the SVG WG. The > >>
> >> implementation was done to get experience to feed back to the SVG >
> >> >> WG. The WG is tring to sort out the details of how text
> >> wrapping > >> will work - what features to support, what algs
> >> should be used, > >> etc.
> >> > >>
> >> > AP> I'm using the cvs version (week or so old). I have a single
> >> flow > AP> region and it would be nice (though not critical) to
> >> vertically > AP> centre the text. > >> This wouldn't be hard to
> >> implement for this case (or actually even > >> for multiple flow
> >> regions), but I haven't bothered since everything > >> is about to
> >> change anyway.
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: batik-users-help@xml.apache.org
>
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RE: Question about vertical-align in flowText extension
Posted by Thomas E Deweese <th...@kodak.com>.
>>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
AP> I've managed to get the rendering working (for the simple cases of
AP> top, bottom and middle), but I'm a little unsure how to package
AP> the align attribute in SVGFlowTextElementBridge. It seems to me
AP> that the vertical-align attribute should belong to the
AP> <batik:region> element, which is currently converted to a
AP> Rectangle2D.
Unfortunately, I can see arguments on both sides of this
(horizontal alignment would then per-para but vertical alignment would
be on regions), I tend to agree that vertical-align belongs on the
region element (just be aware that in the end this is the sort of
thing the SVG WG is likely to change).
AP> I'm guessing that the list of rectangles produced (by
AP> SVGFlowTextElementBridge.gatherRects) eventually ends up as the
AP> list of flowRects passed to GlyphLayout.textWrapTextChunk() and
AP> that I should be passing a RegionInfo class that holds the
AP> rectangle and the alignment instead.
AP> Sound ok?
Sounds about right, BTW gatherRects is only called from one place
which is where the rectangles are attached to the attributed string.
So a simple change would be to change gatherRects to gatherRegionInfo,
and have it return a list of RegionInfo objects. Similar small
parallel changes on the other side should finish the job!
Thanks, for doing this.
AP> Cheers Andrew
AP> On Wed, 2002-11-13 at 09:29, Andrew Pietsch wrote:
>> Thanks for that, I'll give it a go.. (c:
>>
>> On Tue, 2002-11-12 at 00:33, Thomas E Deweese wrote: > >>>>> "AP"
>> == Andrew Pietsch <ap...@optushome.com.au> writes:
>> >
>> > AP> I've now decided I need this.. )c:
>> >
>> > AP> I'm presuming the final implementation is still someway off,
>> so is > AP> there any change of adding it (since you feel its easy)
>> or > AP> pointing me in the right direction so I can implement it?
>> >
>> > I'll gadly point you in the right direction ;)
>> >
>> > All of text wrapping is done as a post-processing step in text >
>> layout. That post-processing step has two parts, first it figures
>> out > what needs to be on each line, then it positions all the
>> glyphs.
>> >
>> > All this work is done in the two methods:
>> >
>> > // Does the line break determination >
>> batik.gvt.text.GlyphLayout.textWrapTextChunk(....)
>> >
>> > // Does the glyph positioning >
>> batik.gvt.text.GlyphLayout.layoutChunk(....)
>> >
>> > As textWrapTextChunk does it's work it adde LineInfo object to a
>> > list, one for each line of text.
>> >
>> > What I would suggest is adding a vertical-align offset member to
>> > the LineInfo class. This should be a Point2D.float. Use the
>> same > Point2D.float for all lines in a single flowRect (the list
>> of > flowRects is accessed from the 'flowRectsIter'). When we hit
>> the end > of a flowRect (or of text), you can get the vertical size
>> from 'dy' > (depending on the case you will need to figure in the
>> current line's > size - search for 'bottomEdge') & the flow rect
>> size from cRect.height > from this you can calculate the 'left
>> over' space and put half of it > in the vertical-align Point2D's y
>> value.
>> >
>> > Then in the layoutChunk method just add the vertical-align offset
>> > in when calculating the correct lineLoc for the current line.
>> >
>> > ---
>> >
>> > You will also need to pass this information to the text-wrap
>> stuff > from the source SVG. This is mostly done in the >
>> batik.extension.svg.SVGFlowTextElementBridge class. You might look
>> at > how the margin's are done (search for makeMarginInfo) or how
>> the > FlowRegions are handleded (search for getRegions).
>> >
>> > ---
>> >
>> > Hope this helps, and good luck (if you get into it and have >
>> specific questions feel free to post).
>> >
>> > AP> Thanks Andrew
>> >
>> > AP> On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote: > >>
>> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
>> > >>
>> > AP> Hi,I was wondering if the css vertical-align property is
>> supported > AP> (or planned) when using the flow text extension
>> (i've tried a few > AP> times and browsed the code so I'm guessing
>> no). > >> No, and eventually :)
>> > >>
>> > >> This is on hold pending decisions in the SVG WG. The > >>
>> implementation was done to get experience to feed back to the SVG >
>> >> WG. The WG is tring to sort out the details of how text
>> wrapping > >> will work - what features to support, what algs
>> should be used, > >> etc.
>> > >>
>> > AP> I'm using the cvs version (week or so old). I have a single
>> flow > AP> region and it would be nice (though not critical) to
>> vertically > AP> centre the text. > >> This wouldn't be hard to
>> implement for this case (or actually even > >> for multiple flow
>> regions), but I haven't bothered since everything > >> is about to
>> change anyway.
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RE: Question about vertical-align in flowText extension
Posted by Andrew Pietsch <ap...@optushome.com.au>.
Howdy,
I've managed to get the rendering working (for the simple cases of top,
bottom and middle), but I'm a little unsure how to package the align
attribute in SVGFlowTextElementBridge. It seems to me that the
vertical-align attribute should belong to the <batik:region> element,
which is currently converted to a Rectangle2D. I'm guessing that the
list of rectangles produced (by SVGFlowTextElementBridge.gatherRects)
eventually ends up as the list of flowRects passed to
GlyphLayout.textWrapTextChunk() and that I should be passing a
RegionInfo class that holds the rectangle and the alignment instead.
Sound ok?
Cheers
Andrew
On Wed, 2002-11-13 at 09:29, Andrew Pietsch wrote:
> Thanks for that, I'll give it a go..
> (c:
>
> On Tue, 2002-11-12 at 00:33, Thomas E Deweese wrote:
> > >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
> >
> > AP> I've now decided I need this.. )c:
> >
> > AP> I'm presuming the final implementation is still someway off, so is
> > AP> there any change of adding it (since you feel its easy) or
> > AP> pointing me in the right direction so I can implement it?
> >
> > I'll gadly point you in the right direction ;)
> >
> > All of text wrapping is done as a post-processing step in text
> > layout. That post-processing step has two parts, first it figures out
> > what needs to be on each line, then it positions all the glyphs.
> >
> > All this work is done in the two methods:
> >
> > // Does the line break determination
> > batik.gvt.text.GlyphLayout.textWrapTextChunk(....)
> >
> > // Does the glyph positioning
> > batik.gvt.text.GlyphLayout.layoutChunk(....)
> >
> > As textWrapTextChunk does it's work it adde LineInfo object to a
> > list, one for each line of text.
> >
> > What I would suggest is adding a vertical-align offset member to
> > the LineInfo class. This should be a Point2D.float. Use the same
> > Point2D.float for all lines in a single flowRect (the list of
> > flowRects is accessed from the 'flowRectsIter'). When we hit the end
> > of a flowRect (or of text), you can get the vertical size from 'dy'
> > (depending on the case you will need to figure in the current line's
> > size - search for 'bottomEdge') & the flow rect size from cRect.height
> > from this you can calculate the 'left over' space and put half of it
> > in the vertical-align Point2D's y value.
> >
> > Then in the layoutChunk method just add the vertical-align offset
> > in when calculating the correct lineLoc for the current line.
> >
> > ---
> >
> > You will also need to pass this information to the text-wrap stuff
> > from the source SVG. This is mostly done in the
> > batik.extension.svg.SVGFlowTextElementBridge class. You might look at
> > how the margin's are done (search for makeMarginInfo) or how the
> > FlowRegions are handleded (search for getRegions).
> >
> > ---
> >
> > Hope this helps, and good luck (if you get into it and have
> > specific questions feel free to post).
> >
> > AP> Thanks Andrew
> >
> > AP> On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote:
> > >> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
> > >>
> > AP> Hi,I was wondering if the css vertical-align property is supported
> > AP> (or planned) when using the flow text extension (i've tried a few
> > AP> times and browsed the code so I'm guessing no).
> > >> No, and eventually :)
> > >>
> > >> This is on hold pending decisions in the SVG WG. The
> > >> implementation was done to get experience to feed back to the SVG
> > >> WG. The WG is tring to sort out the details of how text wrapping
> > >> will work - what features to support, what algs should be used,
> > >> etc.
> > >>
> > AP> I'm using the cvs version (week or so old). I have a single flow
> > AP> region and it would be nice (though not critical) to vertically
> > AP> centre the text.
> > >> This wouldn't be hard to implement for this case (or actually even
> > >> for multiple flow regions), but I haven't bothered since everything
> > >> is about to change anyway.
> > >>
> > >> ---------------------------------------------------------------------
> > >> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org For
> > >> additional commands, e-mail: batik-users-help@xml.apache.org
> > >>
> >
> >
> >
> > AP> ---------------------------------------------------------------------
> > AP> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org For
> > AP> additional commands, e-mail: batik-users-help@xml.apache.org
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org
> > For additional commands, e-mail: batik-users-help@xml.apache.org
> >
>
>
>
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>
---------------------------------------------------------------------
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RE: Question about vertical-align in flowText extension
Posted by Andrew Pietsch <ap...@optushome.com.au>.
Thanks for that, I'll give it a go..
(c:
On Tue, 2002-11-12 at 00:33, Thomas E Deweese wrote:
> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
>
> AP> I've now decided I need this.. )c:
>
> AP> I'm presuming the final implementation is still someway off, so is
> AP> there any change of adding it (since you feel its easy) or
> AP> pointing me in the right direction so I can implement it?
>
> I'll gadly point you in the right direction ;)
>
> All of text wrapping is done as a post-processing step in text
> layout. That post-processing step has two parts, first it figures out
> what needs to be on each line, then it positions all the glyphs.
>
> All this work is done in the two methods:
>
> // Does the line break determination
> batik.gvt.text.GlyphLayout.textWrapTextChunk(....)
>
> // Does the glyph positioning
> batik.gvt.text.GlyphLayout.layoutChunk(....)
>
> As textWrapTextChunk does it's work it adde LineInfo object to a
> list, one for each line of text.
>
> What I would suggest is adding a vertical-align offset member to
> the LineInfo class. This should be a Point2D.float. Use the same
> Point2D.float for all lines in a single flowRect (the list of
> flowRects is accessed from the 'flowRectsIter'). When we hit the end
> of a flowRect (or of text), you can get the vertical size from 'dy'
> (depending on the case you will need to figure in the current line's
> size - search for 'bottomEdge') & the flow rect size from cRect.height
> from this you can calculate the 'left over' space and put half of it
> in the vertical-align Point2D's y value.
>
> Then in the layoutChunk method just add the vertical-align offset
> in when calculating the correct lineLoc for the current line.
>
> ---
>
> You will also need to pass this information to the text-wrap stuff
> from the source SVG. This is mostly done in the
> batik.extension.svg.SVGFlowTextElementBridge class. You might look at
> how the margin's are done (search for makeMarginInfo) or how the
> FlowRegions are handleded (search for getRegions).
>
> ---
>
> Hope this helps, and good luck (if you get into it and have
> specific questions feel free to post).
>
> AP> Thanks Andrew
>
> AP> On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote:
> >> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
> >>
> AP> Hi,I was wondering if the css vertical-align property is supported
> AP> (or planned) when using the flow text extension (i've tried a few
> AP> times and browsed the code so I'm guessing no).
> >> No, and eventually :)
> >>
> >> This is on hold pending decisions in the SVG WG. The
> >> implementation was done to get experience to feed back to the SVG
> >> WG. The WG is tring to sort out the details of how text wrapping
> >> will work - what features to support, what algs should be used,
> >> etc.
> >>
> AP> I'm using the cvs version (week or so old). I have a single flow
> AP> region and it would be nice (though not critical) to vertically
> AP> centre the text.
> >> This wouldn't be hard to implement for this case (or actually even
> >> for multiple flow regions), but I haven't bothered since everything
> >> is about to change anyway.
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org For
> >> additional commands, e-mail: batik-users-help@xml.apache.org
> >>
>
>
>
> AP> ---------------------------------------------------------------------
> AP> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org For
> AP> additional commands, e-mail: batik-users-help@xml.apache.org
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org
> For additional commands, e-mail: batik-users-help@xml.apache.org
>
---------------------------------------------------------------------
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RE: Question about vertical-align in flowText extension
Posted by Thomas E Deweese <th...@kodak.com>.
>>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
AP> I've now decided I need this.. )c:
AP> I'm presuming the final implementation is still someway off, so is
AP> there any change of adding it (since you feel its easy) or
AP> pointing me in the right direction so I can implement it?
I'll gadly point you in the right direction ;)
All of text wrapping is done as a post-processing step in text
layout. That post-processing step has two parts, first it figures out
what needs to be on each line, then it positions all the glyphs.
All this work is done in the two methods:
// Does the line break determination
batik.gvt.text.GlyphLayout.textWrapTextChunk(....)
// Does the glyph positioning
batik.gvt.text.GlyphLayout.layoutChunk(....)
As textWrapTextChunk does it's work it adde LineInfo object to a
list, one for each line of text.
What I would suggest is adding a vertical-align offset member to
the LineInfo class. This should be a Point2D.float. Use the same
Point2D.float for all lines in a single flowRect (the list of
flowRects is accessed from the 'flowRectsIter'). When we hit the end
of a flowRect (or of text), you can get the vertical size from 'dy'
(depending on the case you will need to figure in the current line's
size - search for 'bottomEdge') & the flow rect size from cRect.height
from this you can calculate the 'left over' space and put half of it
in the vertical-align Point2D's y value.
Then in the layoutChunk method just add the vertical-align offset
in when calculating the correct lineLoc for the current line.
---
You will also need to pass this information to the text-wrap stuff
from the source SVG. This is mostly done in the
batik.extension.svg.SVGFlowTextElementBridge class. You might look at
how the margin's are done (search for makeMarginInfo) or how the
FlowRegions are handleded (search for getRegions).
---
Hope this helps, and good luck (if you get into it and have
specific questions feel free to post).
AP> Thanks Andrew
AP> On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote:
>> >>>>> "AP" == Andrew Pietsch <ap...@optushome.com.au> writes:
>>
AP> Hi,I was wondering if the css vertical-align property is supported
AP> (or planned) when using the flow text extension (i've tried a few
AP> times and browsed the code so I'm guessing no).
>> No, and eventually :)
>>
>> This is on hold pending decisions in the SVG WG. The
>> implementation was done to get experience to feed back to the SVG
>> WG. The WG is tring to sort out the details of how text wrapping
>> will work - what features to support, what algs should be used,
>> etc.
>>
AP> I'm using the cvs version (week or so old). I have a single flow
AP> region and it would be nice (though not critical) to vertically
AP> centre the text.
>> This wouldn't be hard to implement for this case (or actually even
>> for multiple flow regions), but I haven't bothered since everything
>> is about to change anyway.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org For
>> additional commands, e-mail: batik-users-help@xml.apache.org
>>
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