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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: ordering and iteration problem
 Hi Jeni, How would you modify your solution to accomodate Mark's XML file modified as follows: <circuit-breaker-panel var="888"> <circuit-breaker column="1" row="1" height="2"> <amps>60</amps> <special>doubled</special> <description>heat pump</description> <circuit-breaker-panel> <circuit-breaker column="1" row="1" height="1"> <amps>99</amps> <description>the upper stairs</description> </circuit-breaker> </circuit-breaker-panel> </circuit-breaker> <circuit-breaker column="1" row="3" height="1"> <amps>15</amps> <description>upper stairs</description> </circuit-breaker> <circuit-breaker column="2" row="7" height="1"> <amps>15</amps> <description/> </circuit-breaker> <circuit-breaker column="2" row="8" height="2"> <amps>20</amps> <special>doubled</special> <description/> </circuit-breaker> </circuit-breaker-panel> ..the difference is that now there could be a nested table of Circuit Breakers. Using the "key" function in your stylesheet does not provide that kind of output. I'm looking to still do recursion within a cell to look for a nested table there (N levels down) Thanks, Hector.
Hi Mark, My thinking is that I need to do something like
You need to define some random nodes - I usually use nodes from the stylesheet: <xsl:variable name="random-nodes" select="document('')//node()" /> And since you'll be iterating over them, you need some way of getting back to the data: <xsl:variable name="data" select="/" /> I've used two keys to get the relevant circuit breakers quickly. One just indexes them by column (this is so you can work out whether you need to add a cell or whether there's a circuit breaker from higher in the column that covers it). The other indexes them by row and column. <xsl:key name="breakers-by-column" match="b:circuit-breaker"
use="@column" />
<xsl:key name="breakers" match="b:circuit-breaker"
use="concat(@row, ':', @column)" />I've assumed that you've stored the maximum number of rows in a global variable called $max-row and the maximum number of columns in a global variable called $max-col. Here's the template that does the work: <xsl:template match="/"> <!-- store the right number of nodes for the rows in a variable --> <xsl:variable name="rows" select="$random-nodes[position() <= $max-row]" /> <!-- store the right number of nodes for the columns in a variable --> <xsl:variable name="columns" select="$random-nodes[position() <= $max-col]" /> <!-- create the table --> <table> <!-- iterate over the right set of nodes to get the rows --> <xsl:for-each select="$rows"> <!-- store the row number --> <xsl:variable name="row" select="position()" /> <!-- create the row --> <tr> <!-- iterate over the right set of nodes to get the columns --> <xsl:for-each select="$columns"> <!-- store the column number --> <xsl:variable name="col" select="position()" /> <!-- change the current node so that the key works --> <xsl:for-each select="$data"> <!-- identify the relevant circuit breaker --> <xsl:variable name="breaker" select="key('breakers', concat($row, ':', $col))" /> <xsl:choose> <!-- if there is one, apply templates to get the table cell --> <xsl:when test="$breaker"> <xsl:apply-templates select="$breaker" /> </xsl:when> <xsl:otherwise> <!-- find other breakers that start higher in the column --> <xsl:variable name="column-breakers" select="key('breakers-by-column', $col) [@row < $row]" /> <!-- output an empty cell if there isn't one that overlaps --> <xsl:if test="not($column-breakers [@row + @height > $row])"> <td /> </xsl:if> </xsl:otherwise> </xsl:choose> </xsl:for-each> </xsl:for-each> </tr> </xsl:for-each> </table> </xsl:template> <!-- template to give the cell for the circuit breaker -->
<xsl:template match="b:circuit-breaker">
<td rowspan="{@height}">
<xsl:value-of select="b:amps" />
</td>
</xsl:template>If you don't like the 'one big template' approach, then you could split it down by applying templates to the row and column nodes in 'row' and 'column' modes to distinguish between the two. I hope that helps, Jeni _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list 
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