[xep-support] Height of Table Rows With Empty Content

[Eliot Kimber]

I am generating a three-row table where the second and third row cells
contain only zero-width space (​). The first row cells contain
text (I'm drawing a little pica ruler, with numbers every 12 picas).

The ZWSP is there to force XSL Formatter to preserve the blocks (with
2.5R5, XSL Formatter started discarding FOs that have empty content).
The second and third cells have start borders to create the ruler effect.

XSL Formatter renders this table with the height of the rows equal to
the current line height (which is set to 100% coming into the table.
However, XEP renders the rows with a very small height, such that the
ruler is just a line of dots.

If I set an explicit height= attribute on the rows, then XEP renders the
rows to that height. XSL Formatter ignores the height if it is less than
the current line height (e.g., height="0.5em").

I think the no-height-specified behavior of XEP is a bug since there is
content in the cells, which should require that the inline areas be
rendered at the current line height. It seems clear from the XSL-FO and
CSS2 specs that the row height should be the determined by the cell
content if it is greater than the height (if specified).

The only other possibility is that XEP is treating ZWS as also having
zero height, but I don't think that would be a correct behavior either,
at least to the degree I understand the semantics of that character.

Cheers,

Eliot
-- 
W. Eliot Kimber
Professional Services
Innodata Isogen
9030 Research Blvd, #410
Austin, TX 78758
(512) 372-8122

eliot at innodata-isogen.com
www.innodata-isogen.com




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