[CSS3 box] Proposal: content-align

Hi.


There was some time ago a discussion about vertical alignment of block 
elements' content
( http://lists.w3.org/Archives/Public/www-style/2005Jun/0039 ).   I 
looked through CSS 3
box model and haven't found anything to do this kind of job  (it IS 
actually working for
table cells with vertical-align in a quite similar way...):

    |-           width            -|

    +------------------------------+ -
    |This is some text that        | |
    |doesn't completely fill       |
    |a block element               |
    |                              | height
    |                              |
    |                              |
    |                              | |
    +------------------------------+ -

                  \   /
                   \ /
                    V

    +------------------------------+
    |                              |
    |                              |
    |    This is some text that    |
    |    doesn't completely fill   |
    |    a block element           |
    |                              |
    |                              |
    +------------------------------+



Therefore my proposal:

Name:            content-align
Value:           [[<percentage> | <length> ]{1,2}
                    | [[top | center | bottom] || [left | center | 
right] ]] | auto
Initial:         0% 0%
Applies to:      block elements
Percentages:     refer to width and height of container element

Description:     The bounding box of the content is computed. 
Afterwards it is aligned
                  inside  the containing  block element  according to 
the value  of  the
                  content-align property.

E.g.,  'content-align: center;'  means  the rendering just like my 
second example above.
This property is somewhat similar to 'fit-position', just without the 
'fit' part.

Regards
Manuel