Re: [xsl] Aligning Parallel Columns

[Jeroen Hellingman <jeroen@xxxxxxxx>]

After puzzling a little further, I came up with the following:

This pulls the inserted lines into the table cell with the matching
lines, which isn't bad for my application, as mostly, such extra lines
will be split-of parts of paragraphs anyway.


<xsl:template name="align-paragraphs">
    <xsl:param name="a"/>
    <xsl:param name="b"/>

    <xsl:variable name="anchors" as="xs:string*">
        <xsl:for-each-group select="$a/p/@name, $b/p/@name" group-by=".">
            <xsl:if test="count(current-group()) = 2">
                <xsl:sequence select="string(.)"/>
            </xsl:if>
        </xsl:for-each-group>
    </xsl:variable>

    <table>
        <xsl:for-each select="$a/p[@name = $anchors]">
            <xsl:variable name="name" select="@name"/>

            <tr>
                <td>
                    <p><xsl:apply-templates select="."/></p>
                    <xsl:call-template name="output-inserted-lines">
                        <xsl:with-param name="start" select="."/>
                        <xsl:with-param name="anchors" select="$anchors"/>
                    </xsl:call-template>
                </td>
                <td>
                    <p><xsl:apply-templates select="$b/p[@name =
$name]"/></p>
                    <xsl:call-template name="output-inserted-lines">
                        <xsl:with-param name="start" select="$b/p[@name
= $name]"/>
                        <xsl:with-param name="anchors" select="$anchors"/>
                    </xsl:call-template>
                </td>
            </tr>
        </xsl:for-each>
    </table>

</xsl:template>


I didn't grasp the function idea entirely, but using a recursive
template works fine. The paragraphs that go into the table
still have internal structure that needs to be rendered.


<xsl:template name="output-inserted-lines">
    <xsl:param name="start" as="node()"/>
    <xsl:param name="anchors"/>
    <xsl:variable name="next" select="$start/following-sibling::*[1]"/>

    <xsl:if test="not($next/@name = $anchors)">
        <xsl:if test="$next">
            <p><xsl:apply-templates select="$next"/></p>

            <xsl:call-template name="output-inserted-lines">
                <xsl:with-param name="start" select="$next"/>
                <xsl:with-param name="anchors" select="$anchors"/>
            </xsl:call-template>
        </xsl:if>
    </xsl:if>
</xsl:template>