[OASIS Issue Tracker] (OFFICE-3824) Which coordinate system is used in draw:enhanced-geometry, when svg:viewBox is missing

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

     [ https://issues.oasis-open.org/browse/OFFICE-3824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Durusau updated OFFICE-3824:
------------------------------------
    Fix Version/s: ODF 1.4
                       (was: ODF 1.3)

> Which coordinate system is used in draw:enhanced-geometry, when svg:viewBox is missing
> --------------------------------------------------------------------------------------
>
>                 Key: OFFICE-3824
>                 URL: https://issues.oasis-open.org/browse/OFFICE-3824
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Bug
>          Components: Graphics, Part 1 (Schema)
>    Affects Versions: ODF 1.2
>            Reporter: Regina Henschel
>            Priority: Major
>             Fix For: ODF 1.4
>
>
> In schema v1.2  in <define name="draw-enhanced-geometry-attlist"> the attribute <attribute name="svg:viewBox"> is optional. But the element draw:enhanced-geometry has a lot of attributes and child elements, which use coordinates or length without unit. To determine their values with unit, the values of svg:viewBox are mapped to the position and size of the shape.
> In case the attribute svg:viewBox is missing, current implementations act different. This was discussed in thread https://www.oasis-open.org/apps/org/workgroup/office/email/archives/201303/msg00036.html. The thread has an example document attached.
> There are several solutions imaginable:
> (1) Define a default viewBox, for example svg.viewBox="0 0 21600 21600". This solution is used in AOO.
> (2) Define, that the viewBox is calculated from maximal and minimal values actually used. Calligra seems to do something of this kind
> (3) Add, that the attribute svg:viewBox may not be missing, if there exists any position or length value without unit in the attributes and child elements.
> (4) Add, that for interoperability the attribute svg:viewBox should not be missing, and missing attribute svg:viewBox gives implementation dependent results.



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