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Subject: Re: [office] Tabulator (TAB) questions to implementors

Hi all,

sorry for stepping in soo late in the discussion - a one-week vacation more or less costs one-week to got through the mail and tasks backlog.

I am 100% confirming Regina's observation on OpenOffice regarding the TABS inheritance. OpenOffice has implemented TABS inheritance on the style:tab-stops element level.

I would be in favor to introduce TABS inheritance on the individual tab stop level.
As far as I know OOXML has such an inheritance and has a feature for "removing"/"clearing" an inherited tab stop.
But, the "removing"/"clearing" feature is not fully clear to me, especially in the scenario when the "removed"/"cleared" tab stop is changed in the parent style. May be one of our TC members from Microsoft could give further input here.

Mit freundlichen Grüßen / Best regards
Oliver-Rainer Wittmann

Advisory Software Engineer
IBM Deutschland
Beim Strohhause 17
20097 Hamburg
Phone: +49-40-6389-1415
E-Mail: orwitt@de.ibm.com
IBM Deutschland Research & Development GmbH / Vorsitzende des Aufsichtsrats: Martina Koederitz
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294

From:        Regina Henschel <regina.henschel@libreoffice.org>
To:        office@lists.oasis-open.org,
Date:        14.10.2013 20:32
Subject:        Re: [office] Tabulator (TAB) questions to implementors
Sent by:        <office@lists.oasis-open.org>

Hi Svante,

I have looked, what AOO/LO do with tab stops.

Only if the child style has no own style:tab-stops element, then the tab
stops of the parent style are used.

If the user changes a tab-stop of the child, then the child gets an own
style:tab-stops element and all current tab-stops of the parent are
copied to the style. So a "burn-in" is done. This holds for changing a
style (which is in styles.xml) or changing by direct formatting (which
is in current.xml).

If all tab stops in the child are deleted, an empty style:tab-stops
element remains.

When a style:tab-stops element exists for the child -might be an empty
one-, no tab stops of the parent are used and changes in the tab stops
of the parent do not propegate to the child. Only when the user resets
the tab stops to use the inherited ones, the parent style tab stops are
used again.

There is no mix of parent and child tab stops.

[The UI in AOO/LO does not indicate, whether tab stops are deleted or
whether they are reset to use the parent ones. I think, that is in error
in the UI of AOO/LO.]

Kind regards

Svante Schubert schrieb:
> Are tabulators being inherited in ODF XML similar as style properties are?
> Perhaps the first question should be: Are all other style properties
> being inherited in all circumstances?
> Regarding Tabs:
> Within a content (or styles) XML file within a package a TAB declaration
> may look like:
> <style:style style:name="Heading_20_1" style:display-name="Heading 1"
> style:family="paragraph">
>      <style:paragraph-properties>
>          <style:tab-stops>
>              <style:tab-stop style:position="2cm"/>
>              <style:tab-stop style:position="3cm"/>
>              <style:tab-stop style:position="5.001cm"/>
> Explained by ODF 1.2 via
> and inheritance is mentioned for <style:style>
>  From a simple test in one ODF application it seems TABs are NOT being
> inherited, which seems wrong at the first sight, but when taking a look
> OOXML, where TABs are being inherited, but can be ignored on paragraph
> level via a 'clear' attribute, the absolute writing of TABs would
> guarantee interoperability.
> Please note, the inheritance within the XML, does not say anything about
> about the inheritance during run-time. Even without inheritance, full
> absolute TAB positioning for every paragraph there would be run-time
> inheritance possible.
> If we want to inherit TABS during run-time, we would on the other hand
> require something similar to 'clear' to guarantee interoperability among
> the ISO Office format standards.
> PS: In addition we might want to define the following attribute for TABs
> as well
> as currently the position dependent on the following settings.xml flag:
> <config:config-item config:name="TabsRelativeToIndent"
> config:type="boolean">false</config:config-item>
> It defines, if the left-margin have to be added to the tab position.
> I will write JIRA issues for the problems, as soon we agree that there
> is a problem.
> Regards,
> Svante
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