RE: [xsl] increment value - philosophy

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

At 2004-02-08 16:28 -0500, Govil, Anoop (Contractor) wrote:
> Thanks for your solution. I tested it in my application. I have a new issue
> with this solution, if one of the sub menu items is empty (i.e., the
> SubMenuLabel tag is empty), it still counts it and doesn't skip that if it
> is empty. I tried various things but still can't skip it. I will really
> appreciate if you think of how to fix that issue to skip a submenuitem node
> if it is empty.

Rather than think about what you are skipping, try to focus on what you are 
counting: you are counting those SubMenuLabel elements that are not 
empty.  When is an element not empty?  When it has node children.

So, only deal with SubMenuLabel[node()] elements.

Again, the idea when working with the hierarchy is to let XSLT do the heavy 
lifting by describing what it is you want done.

I hope this helps.

....................... Ken

t:\ftemp>type snoop.xml
<?xml version="1.0"?>
<MENU>
     <MenuItems>
         <MenuLabel>Menu 1</MenuLabel>
         <SubMenuItems>
             <SubMenuLabel>Sub Menu 1</SubMenuLabel>
         </SubMenuItems>
         <SubMenuItems>
             <SubMenuLabel></SubMenuLabel>
         </SubMenuItems>
         <SubMenuItems>
             <SubMenuLabel>Sub Menu 11</SubMenuLabel>
         </SubMenuItems>
     </MenuItems>
     <MenuItems>
         <MenuLabel>Menu 2</MenuLabel>
         <SubMenuItems>
             <SubMenuLabel></SubMenuLabel>
         </SubMenuItems>
         <SubMenuItems>
             <SubMenuLabel>Sub Menu 2</SubMenuLabel>
         </SubMenuItems>
     </MenuItems>
</MENU>

t:\ftemp>type snoop.xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                 version="1.0">

<xsl:output method="text"/>

<xsl:template match="/">
   <xsl:text>Method 1: using the count function:
</xsl:text>
   <xsl:for-each select="//MenuLabel | //SubMenuLabel[node()]">
     <xsl:value-of select="1 + count(preceding::MenuLabel) +
                           count(preceding::SubMenuLabel[node()])"/>
     <xsl:value-of select="concat(' ',.)"/><xsl:text>
</xsl:text>
   </xsl:for-each>
   <xsl:text>Method 2: using xsl:number:
</xsl:text>
   <xsl:for-each select="//MenuLabel | //SubMenuLabel[node()]">
     <xsl:number level="any" count="MenuLabel | SubMenuLabel[node()]"/>
     <xsl:value-of select="concat(' ',.)"/><xsl:text>
</xsl:text>
   </xsl:for-each>
</xsl:template>

</xsl:stylesheet>


t:\ftemp>saxon snoop.xml snoop.xsl
Method 1: using the count function:
1 Menu 1
2 Sub Menu 1
3 Sub Menu 11
4 Menu 2
5 Sub Menu 2
Method 2: using xsl:number:
1 Menu 1
2 Sub Menu 1
3 Sub Menu 11
4 Menu 2
5 Sub Menu 2

t:\ftemp>


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