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Posted to fop-users@xmlgraphics.apache.org by John Escott <JR...@scanlaser.nl> on 2009/03/04 00:40:12 UTC
block margin as a percentage 0.95 / 0.93 difference
Hi,
I'm having a problem setting a block margin-right to a percentage if the
block is the first child of its containing block and this containing block
is within a block-container. The effect is as though the right-margin is
0. (Using fop 0.95 with pdf output)
For instance, in
<fo:block-container height="40mm">
<fo:block id="1" border="0.4pt solid black">
<fo:block id="2" margin-right="40%"
text-align="right">bad</fo:block>
<fo:block id="3">some text</fo:block>
<fo:block id="4" margin-right="40%"
text-align="right">good</fo:block>
</fo:block>
</fo:block-container>
"bad" is right-aligned at the right-hand side of block 1 but "good" is
positioned near the middle of the block (40% from the right).
If I run it with fop-0.93, then they're both aligned in the "good"
position.
I guess this is a bug in 0.95? or is my understanding of block-container
at fault?
Anyone care to comment?
best regards, John Escott.
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by Andreas Delmelle <an...@telenet.be>.
On 04 Mar 2009, at 21:26, Jeremias Maerki wrote:
> On 04.03.2009 20:26:29 Andreas Delmelle wrote:
>> OK, in the meantime I've found out that the native FO property (end-
>> indent) does work properly. It seems to an error in the corresponding
>> property mapping. I'll look into it further.
>
> No, that's not it. Set a break point in
> AbstractBaseLayoutManager.getAncestorBlockAreaIPD(). The first child
> layout manager of the block[@id=1] (i.e. block[@id=2]) is
> initialize()d
> before block[@id=1] knows its own IPD (due to break-before processing
> within the block-container.
Ah, OK, then the behavior almost seems to be compliant. :-)
Percentages on margin-* are defined in terms of the "containing
block", but for the native FO properties, this is done in terms of the
"containing reference-area"...
Hence why end-indent does produce the intended effect, since it does
not enter the cited method.
Andreas
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by Jeremias Maerki <de...@jeremias-maerki.ch>.
On 04.03.2009 20:26:29 Andreas Delmelle wrote:
>
> On 04 Mar 2009, at 20:13, Andreas Delmelle wrote:
>
> > On 04 Mar 2009, at 19:54, Andreas Delmelle wrote:
> >
> >> No immediate idea on whether it would be difficult to correct, so
> >> that it works the same as in 0.93. If my above assumption is
> >> correct, an immediate workaround may be to specify the inline-
> >> progression-dimension on the block-container (if possible).
> >
> > Sorry, should've checked this. Just did and this doesn't work
> > either...
>
> OK, in the meantime I've found out that the native FO property (end-
> indent) does work properly. It seems to an error in the corresponding
> property mapping. I'll look into it further.
No, that's not it. Set a break point in
AbstractBaseLayoutManager.getAncestorBlockAreaIPD(). The first child
layout manager of the block[@id=1] (i.e. block[@id=2]) is initialize()d
before block[@id=1] knows its own IPD (due to break-before processing
within the block-container.
> In the meantime, use end-indent instead of margin-right, and you
> should be fine.
>
>
> HTH!
>
> Andreas
Jeremias Maerki
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by Andreas Delmelle <an...@telenet.be>.
On 04 Mar 2009, at 20:13, Andreas Delmelle wrote:
> On 04 Mar 2009, at 19:54, Andreas Delmelle wrote:
>
>> No immediate idea on whether it would be difficult to correct, so
>> that it works the same as in 0.93. If my above assumption is
>> correct, an immediate workaround may be to specify the inline-
>> progression-dimension on the block-container (if possible).
>
> Sorry, should've checked this. Just did and this doesn't work
> either...
OK, in the meantime I've found out that the native FO property (end-
indent) does work properly. It seems to an error in the corresponding
property mapping. I'll look into it further.
In the meantime, use end-indent instead of margin-right, and you
should be fine.
HTH!
Andreas
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by Andreas Delmelle <an...@telenet.be>.
On 04 Mar 2009, at 19:54, Andreas Delmelle wrote:
> No immediate idea on whether it would be difficult to correct, so
> that it works the same as in 0.93. If my above assumption is
> correct, an immediate workaround may be to specify the inline-
> progression-dimension on the block-container (if possible).
Sorry, should've checked this. Just did and this doesn't work either...
Andreas
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by Andreas Delmelle <an...@telenet.be>.
On 04 Mar 2009, at 12:13, Vincent Hennebert wrote:
Hi
> John Escott wrote:
>> Hi,
>>
>> I'm having a problem setting a block margin-right to a percentage
>> if the
>> block is the first child of its containing block and this
>> containing block
>> is within a block-container. The effect is as though the right-
>> margin is
>> 0. (Using fop 0.95 with pdf output)
> <snip />
> This indeed sounds like a bug. Would you mind creating a bug report on
> Bugzilla, and attach a small FO file showing the error?
> https://issues.apache.org/bugzilla/enter_bug.cgi?product=Fop
FWIW, it seems to be a rather special case...
The block-container has "auto" ipd (determined by the content), so I'm
assuming that at the point the block[@id='2'] is processed, the
percentage is resolved as "40% of zero". After this block, the block-
container's ipd will be updated, so for following blocks there is no
problem (although we could get weird-looking fluctuations in case more
and wider blocks are added)
No immediate idea on whether it would be difficult to correct, so that
it works the same as in 0.93. If my above assumption is correct, an
immediate workaround may be to specify the inline-progression-
dimension on the block-container (if possible).
Cheers
Andreas
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by Vincent Hennebert <vh...@gmail.com>.
Hi John,
This indeed sounds like a bug. Would you mind creating a bug report on
Bugzilla, and attach a small FO file showing the error?
https://issues.apache.org/bugzilla/enter_bug.cgi?product=Fop
Thanks!
Vincent
John Escott wrote:
> Hi,
>
> I'm having a problem setting a block margin-right to a percentage if the
> block is the first child of its containing block and this containing block
> is within a block-container. The effect is as though the right-margin is
> 0. (Using fop 0.95 with pdf output)
>
> For instance, in
> <fo:block-container height="40mm">
> <fo:block id="1" border="0.4pt solid black">
> <fo:block id="2" margin-right="40%"
> text-align="right">bad</fo:block>
> <fo:block id="3">some text</fo:block>
> <fo:block id="4" margin-right="40%"
> text-align="right">good</fo:block>
> </fo:block>
> </fo:block-container>
> "bad" is right-aligned at the right-hand side of block 1 but "good" is
> positioned near the middle of the block (40% from the right).
>
> If I run it with fop-0.93, then they're both aligned in the "good"
> position.
>
> I guess this is a bug in 0.95? or is my understanding of block-container
> at fault?
> Anyone care to comment?
>
> best regards, John Escott.
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Re: block margin as a percentage 0.95 / 0.93 difference
Posted by John Escott <jr...@scanlaser.nl>.
I've entered this in bugzilla as bug 46813
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