I'm trying to use a marker to determine the image to show in a header/footer. Each chapter has a marker which communicates the image to use. When I use <fo:marker / <fo:retreive-marker in an <xsl:attribute element, it understandably produces an invalid src= value.
e.g. pages:
Header for page 1 and 2 would reference <external-graphic src="1.png"/> and 3 would reference <external-graphic src="2.png"/>.
How can I embed an image in a header or footer that varies based on the flow content?
An fo:marker could contain just text, but you can't retrieve that text to make the value of a src property.
What would work is to retrieve an entire fo:external-graphic that has the correct src value. Something like (untested):
<fo:page-sequence master-reference="...">
<fo:marker marker-class-name="image">
<fo:external-graphic src="1.png"/>
</fo:marker>
<fo:static-content flow-name="xsl:region-after">
<fo:block><fo:retrieve-marker retrieve-class-name="image"/></fo:block>
</fo:static-content>
<!-- Stuff -->
</fo:page-sequence>
<fo:page-sequence master-reference="...">
<fo:marker marker-class-name="image">
<fo:external-graphic src="2.png"/>
</fo:marker>
<fo:static-content flow-name="xsl:region-after">
<fo:block><fo:retrieve-marker retrieve-class-name="image"/></fo:block>
</fo:static-content>
<!-- More stuff -->
</fo:page-sequence>