How can I simultaneously transform the attribute and content of a node? - xslt

Question

I am converting an XML document to HTML, and am struggling to select both the attribute and content of the original element.
The XML document contains variables (inserted by the document editor) like this example:
<var styleclass="Interface b"><%BACKGROUND%></var>
I would like to both convert the text content and surround this with a span tag to apply the style.
My XSLT declarations are as follows:
<xsl:template match="var">
<xsl:choose>
<xsl:when test="#style='font-weight:bold;'">
<strong>
<xsl:apply-templates/>
</strong>
</xsl:when>
<xsl:when test="#styleclass='Interface'">
<span style="color:white; background-color: rgb(98, 98, 98);">
<xsl:apply-templates/>
</span>
</xsl:when>
<xsl:when test="#styleclass='Interface b'">
<span style="color: rgb(98, 98, 98); background-color: rgb(233, 180, 0);">
<xsl:apply-templates/>
</span>
</xsl:when>
<xsl:when test="#styleclass='Interface c'">
<span style="color: black; background-color: rgb(234, 235, 237);">
<xsl:apply-templates/>
</span>
</xsl:when>
<xsl:when test="#styleclass='Warning a'">
<span style="color:#e74c3c">
<xsl:apply-templates/>
</span>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template match="var[contains(text(),'BACKGROUND')]">
Background
</xsl:template>
<xsl:template match="var[contains(text(),'COLOR PICKER')]">
Color picker
</xsl:template>
<xsl:template match="var[contains(text(),'PARAGRAPH')]">
Paragraph
</xsl:template>
<xsl:template match="var[contains(text(),'IMPORT DATA')]">
Import data
</xsl:template>
However, the output contains the correctly converted text but without the surrounding span tag.

Answer 1

If you can use XSLT 2/3 I would consider using xsl:next-match e.g. along the lines of
<xsl:template match="var[contains(.,'BACKGROUND')]">
Background
</xsl:template>
<xsl:template match="var[#styleclass = 'Interface b']">
<span style="color:white; background-color: rgb(98, 98, 98);">
<xsl:next-match/>
</span>
</xsl:template>
<xsl:mode on-no-match="shallow-copy" on-multiple-match="use-last"/>
So for the attribute based match I have also used a template with the particular condition in a predicate and would suggest to write a new template for each new condition instead of those xsl:choose/xsl:when approach.
But even if you prefer that you can use xsl:next-match in there instead of xsl:apply-templates.