Hi Regina,
On 4/22/25 11:29, Regina Henschel wrote:
Hi all,
The ODF TC currently discusses OFFICE-2317 "Text distribute
justification" [1]. The issue is about the proposal in the OASIS-Wiki
[2].
I can see myself being the author of this proposal... This was authored
almost 15 years ago. I must say I could have added a bit more detail in
this proposal to make less open to interpretation, but alas, I can't go
back in time to fix it. :-)
(A)
The proposal wants to introduce a new attribute "css3t:text-justify"
with values "auto" and "distribute".
Problem is, that the actual CSS3 draft [3] has the values "auto",
"none", "inter-word" and "inter-character". The draft states in
addition, that a UA must additionally support "distribute" and treat
it as "inter-character".
CCS3's "inter-character" appears to correspond with the "distribute"
mode. So I would say ODF can also inherit this "inter-character" value
here instead of the old "distribute" value as specified in the
proposal. When I authored this proposal I chose the value "distribute"
likely because the CSS3 draft proposal available back then also used
that word. The latest CCS2 draft still references the word "distribute"
as the legacy value to support.
(B)
The proposal wants to introduce a special attribute
style:vertical-justify for use in style:vertical-align. There has been
some work on this in bug tdf#45450. On the other hand, bug tdf#112843
was rejected.
Is such property really needed?
Yes, but only when the text is oriented 90 degrees or 270 degrees i.e.
flows either either top-to-bottom or bottom-to-top, or when the text is
vertically stacked. This feature is useful at least in Japanese
setting. I can't speak for Chinese or Korean settings, but it may be
relevant in those languages as well, or not. I'm not really sure.
When the text flows horizontally i.e. not vertically stacked, the
vertically distributed justification works identically to the normal
vertical justification. There is no difference between these two modes.
You can try this in Calc by putting some Japanese sentence into a cell,
go to the Format Cells dialog, switch to the Alignment tab and check the
"Vertically stacked" check box in the Text Orientation section. Or
leave the check box unchecked, and change the text orientation to either
90 degrees or 270 degrees. Set the vertical text alignment to
"Distributed" and compare how that differs from the "Justified"
alignment. Change the row height if you have difficulty seeing the
effect of this distributed alignment.
You may need to enable Asian language features in the Language Settings
in case it's not there. I'm not sure whether this feature is visible
without the Asian language features enabled.
(C)
LO has implemented something for OFFICE-2317, see around lines #2848
to #2891 in the schema
/core/schema/libreoffice/OpenDocument-v1.4+libreoffice-schema.rng
Is there a UI in LibreOffice for these properties?
When are these properties written to file?
See my reply above. For horizontal distribution, put some Japanese text
into a cell, go to the same dialog location I described above, and
simply set the horizontal text alignment to "Distributed". If it's hard
to see, try widening the column width.
Any advise for the discussion in the ODF TC is welcomed.
Hopefully this helps a bit. Let me know if you need more clarification
on this stuff.
Kohei
