OASIS Open Document Format for Office Applications (OpenDocument) TC

I've corrected the spelling error reported by Warren.
 -- Mr Michael Brauer

Information about the document named Proposals for angle attribute values
(08-03-14-angle-attribute-values.odt) (formerly 08-03-14-proposal00069) has
been modified by Mr Michael Brauer.

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On 16.4.42 "Text Rotation Angle" why are we limiting the rotation
angle to only 0, 90, and 270? Shouldn't users be allowed to
arbitrarily rotate text (and other objects)?

wt

On Thu, Apr 17, 2008 at 12:32 AM,  

Also, I would say that the data type should be improved more specific
than "string" in the schema at the bottom.

wt

On Thu, Apr 17, 2008 at 3:02 PM, Warren Turkal 

Warren Turkal wrote:
> Also, I would say that the data type should be improved more specific
> than "string" in the schema at the bottom.

In general I agree, but the problem that we face is that the only way to 
do so would be define an regular expression that restricts the string 
values. This regular expression would be rather complex and hard to 
read. We further face the problem that we would duplicate a definition 
that is actually part of the SVG specification, from which we take that 
datatype. SVG actually defines it also as string.

We had already some discussions about this, since it is an issue that 
effects other attribute values, too. Finding a solution for that is 
still on our agenda. It is the

"Clarification how to proceed with complex regular expression that 
describe attribute value types."

item in the Wiki:

http://wiki.oasis-open.org/office/OpenDocument_v1.2_Action_Items#head-d117ebdb1531adf3aa1dbb5fb619a2298f88ac0e

Michael


> 
> wt
> 
> On Thu, Apr 17, 2008 at 3:02 PM, Warren Turkal 

On Fri, Apr 18, 2008 at 4:16 AM, Michael Brauer - Sun Germany - ham02
- Hamburg 

Hi Warren,

Warren Turkal wrote:
> On 16.4.42 "Text Rotation Angle" why are we limiting the rotation
> angle to only 0, 90, and 270? Shouldn't users be allowed to
> arbitrarily rotate text (and other objects)?

The attribute is only about text portions that can be rotated. The 
restrictions to the best of my knowledge exist because the purpose of 
the attribute is to give text portions a vertical alignment, rather than 
a horizontal alignment, but not to generally rotate text portions within 
a text. Which means what you can achieve with the attribute is to have a 
paragraph where the first word is lets say horizontally oriented, the 
2nd vertically, and the third again horizontally.

While one may of cause allow to specify arbitrary angles, I don't know 
whether there is really a use case for that, and I'm only not sure what 
the implementation effort would be for such a feature, given that line 
breaks may occur in the text, line heights have to be calculated, and so on.

Graphical objects are rotated by the draw:transform attribute, and there 
is for instance also an attribute that allows to rotate the full content 
of a table cell. These support arbitrary angles.

Best regards

Michael
> 
> wt
> 
> On Thu, Apr 17, 2008 at 12:32 AM,  

I guess we could really always expand the definition if we get a
better idea of what the other angles mean. Fair enough.

wt

On Fri, Apr 18, 2008 at 3:59 AM, Michael Brauer - Sun Germany - ham02
- Hamburg