Hi Martin,
Does your code handle this input?
<blocks>
<block id="i1">content</block>
<block id="i2" width="33">content</block>
<block id="i3" width="67">content</block>
<block id="i4" width="50">content</block>
<block id="i5" width="50">content</block>
<block id="i6" width="25">content</block>
<block id="i6a" width="80">content</block>
<block>content</block>
<block id="i7" width="55">content</block>
<block id="i8" width="20">content</block>
<block id="i9">content</block>
</blocks>
i6 and i6a, taken together, have a width of 105. I guess then i6a needs
to be on a new line.
I introduced an accumulator that can have two values:
<xsl:accumulator name="width" as="xs:integer+" initial-value="0">
<xsl:accumulator-rule match="blocks" select="0"/>
<xsl:accumulator-rule match="block"
select="let $line-width-so-far := $value[1],
$current-width := xs:integer((@width, 100)[1]),
$would-be-line-width := $line-width-so-far
+ $current-width
return (
if ($would-be-line-width gt 100)
then $current-width
else (),
$would-be-line-width
)"/>
</xsl:accumulator>
If the line becomes too long, the width of the current block will be
prepended to the would-be line length in the accumulator. So then there
is a sequence of "line length if line wrap happened before current
block" and "line length if line wrap did not happen before current block".
If, on the other hand, the would-be line length is less than or equal to
100, only a single value (the would-be line length) will go into the
accumulator.
I added its accumulator value(s) to each block:
<blocks>
<block id="i1" width="100" acc="100">content</block>
<block type="composite">
<block id="i2" width="33" acc="33 133">content</block>
<block id="i3" width="67" acc="100">content</block>
</block>
<block type="composite">
<block id="i4" width="50" acc="50 150">content</block>
<block id="i5" width="50" acc="100">content</block>
</block>
<block id="i6" width="25" acc="25 125">content</block>
<block id="i6a" width="80" acc="80 105">content</block>
<block width="100" acc="100 180">content</block>
<block type="composite">
<block id="i7" width="55" acc="55 155">content</block>
<block id="i8" width="20" acc="75">content</block>
</block>
<block id="i9" width="100" acc="100 175">content</block>
</blocks>
This has been achieved with a single grouping:
<xsl:template match="blocks">
<xsl:copy>
<xsl:for-each-group select="block"
group-starting-with="block[accumulator-before('width')[last()] gt
100]">
<xsl:choose>
<xsl:when test="count(current-group()) eq 1">
<xsl:apply-templates select="current-group()"/>
</xsl:when>
<xsl:otherwise>
<block type="composite">
<xsl:apply-templates select="current-group()"/>
</block>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
Gerrit
On 17.09.2020 00:16, Martin Honnen martin(_dot_)honnen(_at_)gmx(_dot_)de wrote:
I was wondering what output is wanted for
<blocks>
<block id="i1">content</block>
<block id="i2" width="33">content</block>
<block id="i3" width="67">content</block>
<block id="i4" width="50">content</block>
<block id="i5" width="50">content</block>
<block id="i6" width="25">content</block>
<block>content</block>
<block id="i7" width="55">content</block>
<block id="i8" width="20">content</block>
<block id="i9">content</block>
</blocks>
Neither my suggestion nor the above seem to only wrap the adjacent
block[@width] where the accumulator gives 100.
I complicated or strengthened my attempt as
<xsl:template match="blocks">
<xsl:copy>
<xsl:for-each-group select="block" group-adjacent="not(@width)">
<xsl:choose>
<xsl:when test="current-grouping-key()">
<xsl:apply-templates select="current-group()"/>
</xsl:when>
<xsl:otherwise>
<xsl:for-each-group select="current-group()"
group-ending-with="block[accumulator-before('width') eq 100]">
<xsl:choose>
<xsl:when
test="current-group()[last()][accumulator-before('width') eq 100]">
<block type="composite">
<xsl:apply-templates select="current-group()"/>
</block>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="current-group()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
--
Gerrit Imsieke
Geschäftsführer / Managing Director
le-tex publishing services GmbH
Weissenfelser Str. 84, 04229 Leipzig, Germany
Phone +49 341 355356 110, Fax +49 341 355356 510
gerrit(_dot_)imsieke(_at_)le-tex(_dot_)de, http://www.le-tex.de
Registergericht / Commercial Register: Amtsgericht Leipzig
Registernummer / Registration Number: HRB 24930
Geschäftsführer / Managing Directors:
Gerrit Imsieke, Svea Jelonek, Thomas Schmidt
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