Yes, in my tests, the original for-each-group will select whitespace-only
nodes as the first group, which is not good. Using the
*|text()[matches(.,'\S')] selector seems to work, including preserving
whitespace between non-block elements.
The for-each-group solution is definitely better than my initial approach.
Cheers,
E.
—————
Eliot Kimber, Owner
Contrext, LLC
http://contrext.com
On 9/15/14, 8:40 AM, "Wendell Piez wapiez(_at_)wendellpiez(_dot_)com"
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Hi again,
I should have added that when grouping to induce structure, you need
to keep in mind that select="node()" will select whitespace-only text
nodes, comments and PIs along with the stuff you probably want, and
these can split your groups. So select="*|text()[matches(.,'\S')]" (or
a similar adjustment) may better when using this technique.
Cheers, Wendell
On Mon, Sep 15, 2014 at 9:33 AM, Wendell Piez wapiez(_at_)wendellpiez(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Hi Eliot,
I would treat this as a special application of a more general problem,
namely grouping loose children that might have been wrapped, but
weren't. Such as splitting paragraphs around lists or other constructs
not permitted in paragraph analogues in the target.
So, select="node()" group-adjacent="cp:isBlock(.)" will return groups
that are either all blocks, or all not blocks.
Inside for-each-group, position() returns the position of the group
within all the groups, so you can use it to determine the first group.
But with all the groups given, plus
when/@test='current-grouping-key()" to determine whether it is (or
isn't) a group of blocks, much more is also possible.
Cheers, Wendell
On Fri, Sep 12, 2014 at 8:10 PM, G. Ken Holman
g(_dot_)ken(_dot_)holman(_at_)gmail(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
At 2014-09-12 21:50 +0000, Eliot Kimber ekimber(_at_)contrext(_dot_)com
wrote:
I think this is an FAQ but my situation may be slightly different. In
any
case, if it's an FAQ, maybe my asking it will help.
This is in a DITA context, where I can know for any element whether
it is
a block or not a block (because in DITA all elements have a base type
that
is inherently block or not block).
I have the situation where a wrapper element may contain any
combination
of text, non-block elements, or block elements.
I need to find either all the nodes up to the first block or determine
that there are none and get the first block.
I think this will work:
select="node()[. << current()/*[lc:isBlock(.)][1]"
But it is XSLT 2.0 only.
For XSLT 1.0 I might do something like:
select="node()[generate-id(following-sibling::*[lc:isBlock(.)][1]) =
generate-id(current()/*[lc:isBlock(.)][1])]"/>
Where the lc:isBlock() function returns true if the element provided
is a
DITA block element.
This seems to pass all my tests but I'm wondering if there's a better
way
to make this check?
I also realized that I can use the $textBeforeBlocks variable to then
process any remaining blocks (because I will have already output the
text
before blocks):
<xsl:when test="$hasTextBeforeBlocks">
<xsl:apply-templates select="node() except($textBeforeBlocks)"/>
</xsl:when>
That includes the block element ... you might try using ">>" in a way
similar to how I used "<<" above if you didn't want to include the
block
element itself.
I hope this helps!
. . . . . . Ken
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