Re: [xsl] block with keep-together.within-line="always"

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2008-04-29 20:44 -0500, John Cavalieri wrote:
> What should happen when a block with
> keep-together.within-line="always" has text which is longer than one
> line?

It goes off the end of the line because you asked it all to keep together.

> Should the text wrap?

Nope.

> For example the following flow:
>
> <fo:flow flow-name="xsl-region-body" line-height="1.2em"
> font-size="10pt" font-family="Times">
>     <fo:block keep-together.within-line="always">
> Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Duis
> ullamcorper fringilla ligula. Donec cursus, justo quis dapibus
> vehicula, erat lacus faucibus mi, vel accumsan nibh arcu at sem. Sed
> adipiscing gravida lectus. Suspendisse non nunc id justo consectetuer
> aliquam. Vivamus.
>      </fo:block>
> </fo:flow>
>
> The spec says keep-together.within-line "...imposes a keep-condition
> .... with context consisting of the line-areas".  And since a
> line-area, according to the spec, is a "special type of block-area" it
> seems to me that the text should wrap.

It is a special type of block area because of its border and padding 
properties and how it is stacked and located by the starting edge of 
the content-rectangle.  Nothing about the line's area constrains the 
text if you specify that the text must keep together.

As a result, in my stylesheets when I specify a keep condition on a 
block I always use keep-together.within-column= because just 
keep-together= implies keep-together.within-line=.  Note that 
keep-together.within-column= is the same as 
keep-together.within-page= on a one-column page, so I rarely (if 
ever) use keep-together.within-page=.

The spec explicitly says in 4.8 "A keep-together condition is 
satisfied if all areas generated and returned by the formatting 
object are descendants of a single context-area." ... since the 
context area is a line, that implies no line breaks or wraps are 
allowed or it wouldn't then be satisfying the keep.

I hope this helps.

. . . . . . . . . . Ken

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