OASIS-4073 Page-content-bottom vertical relation

[Regina Henschel <regina.henschel@libreoffice.org>]

Hi all,

attached is my proposal for OASIS-4073.



But that part of the spec has additional problems which I would like to 
address in new issues:

A)
The attributes <style:vertical-rel> and <style:vertical-pos> can not 
only be used in graphic-properties but also in 
<style:list-level-properties>. That has the effect, that in theory they 
can be uses not only in <text:list-level-style-image> element, but also 
in <test:list-level-style-bullet>, <text:list-level-style-number> and 
<text:outline-level-style>. It is useful for 
<text:list-level-style-image>, but not for the other kind of list labels.

B)
The current spec only describes allowed combinations of vertical-rel and 
text:anchor-type, but does not consider the use for list labels.

C)
The current spec always uses the term "frame", although if used as 
graphic-properties, these attributes can be applied to any kind of 
graphical object.

D)
The attribute <style:vertical-rel> has the values "char", "text" and 
"line". But it is not clear, which area they describe. LibreOffice has 
an illustration, that suggests, that "line" is the character area 
without descenders and "text" including descenders, but the actual 
rendering uses always an area including descender. LibreOffice uses 
"text" only for graphic objects and "char" only for list labels. The 
rendering of them looks equal. [If you examine LibreOffice, you need to 
look at the terms in file format because the wording in the UI differs 
from the file format.]

E)
The definition of "baseline" is not clear in regard to non-latin 
scripts. I have no idea for that.

Ideas for solutions:
(1)
Divide the description to handle list labels and graphic objects separately.
(2)
Use only one of "char", "text" and "line" and deprecate the others.
(3)
Deprecate the use for other list labels than images.
(4)
Explicitly restrict the use with list labels to relations "baseline" and 
the 'winner' of {"char", "text", "line"}.

If you have comments or ideas in regard to these points, please write to 
the list. That way we can focus on OFFICE-4073 in the next call.

Kind regards
Regina

Attachment: Proposal.odt
Description: application/vnd.oasis.opendocument.text