On 21 Jul 2011, at 14:37, Marcos García wrote:
Hi Marcos
> <snip />
> Is there something I am missing, or do you think I should change my approach
> altogether, and use another mechanism for inserting textboxes or other
> floating elements using Apache-Fop?
XSL-FO defines fo:float, which FOP unfortunately does not yet support. I am
unsure whether that is what you would need. fo:float can be used for
before/start/end floating content. To have content float on the after-edge
(i.e. the bottom of the page), one would have to resort to fo:footnotes, which
would imply that the floating content is then mixed with other footnotes, if
present.
That said, you might be able to pull it off using a regular block-container
that takes up 100% of the available height, and then insert the text-boxes in
'absolute' positioned block-containers within the regular block-container.
Absolute will then mean relative to the outer block-container.
Granted, the boxes would then be independent of the surrounding content --i.e.
there would be no intrusions; the surrounding content will just be rendered as
if they weren't there--, so that may not correspond with the expectations about
'floating'...
At any rate, if you can use explicit 'top' coordinates, it would not matter in
which order they appear in the FO. The only constraints are that FOP has no
support for z-index, so if the boxes would overlap, the one that appears last
in the stream will always be rendered 'on top'.
The following sample probably may give a better idea of what I mean:
<fo:block-container height="100%" border="0.5pt solid red">
<fo:block-container absolute-position="absolute" top="100% - 1.2em" left="0"
border="0.5pt solid blue">
<fo:block>Bottom of the page</fo:block>
</fo:block-container>
<fo:block-container absolute-position="absolute" top="0" left="0"
border="0.5pt solid blue">
<fo:block>Top of the page</fo:block>
</fo:block-container>
</fo:block-container>
Try putting a fo:block in between those two fo:block-containers, and you'll
also see what I mean by 'no intrusions' higher up. That block would just
overlap with the text-box at the top.
Also, unless it is really needed for some reason (special text-effects,
rotations, transformations...), I would try to cut out SVG and work as much in
pure XSL-FO as possible.
HTH!
Regards,
Andreas
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