From 491b548ab1410651b00ee1072b6c7d54da401ed7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Demians?= <f.demians@tamil.fr>
Date: Tue, 24 Sep 2013 23:14:50 +0200
Subject: [PATCH] Bugg 8852 XSL handling sufield substring extraction

This patch modify koha-indexdefs-to-zebra.xsl in order to add the
ability to populate indexes with subfield substring.

It's now possible to understand such construction as:

<index_subfields xmlns="http://..." tag="100" subfields="a" offset="7" length="1">
  <target_index>tpubdate:s</target_index>
</index_subfields>
---
 etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl b/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl
index 75e2a86..1488b1c 100644
--- a/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl
+++ b/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl
@@ -253,6 +253,8 @@ definition file (probably something like {biblio,authority}-koha-indexdefs.xml)
     </xsl:template>
 
     <xsl:template name="handle-one-index-subfields">
+        <xsl:variable name="offset"><xsl:value-of select="@offset"/></xsl:variable>
+        <xsl:variable name="length"><xsl:value-of select="@length"/></xsl:variable>
         <xsl:variable name="indexes">
             <xsl:call-template name="get-target-indexes"/>
         </xsl:variable>
@@ -265,7 +267,22 @@ definition file (probably something like {biblio,authority}-koha-indexdefs.xml)
                     </xsl:attribute>
                     <z:index>
                         <xsl:attribute name="name"><xsl:value-of select="normalize-space($indexes)"/></xsl:attribute>
-                        <xslo:value-of select="."/>
+                        <xslo:value-of>
+                            <xsl:attribute name="select">
+                                <xsl:choose>
+                                    <xsl:when test="@length">
+                                        <xsl:text>substring(., </xsl:text>
+                                        <xsl:value-of select="$offset + 1" />
+                                        <xsl:text>, </xsl:text>
+                                        <xsl:value-of select="$length"/>
+                                        <xsl:text>)</xsl:text>
+                                    </xsl:when>
+                                    <xsl:otherwise>
+                                        <xsl:text>.</xsl:text>
+                                    </xsl:otherwise>
+                                </xsl:choose>
+                            </xsl:attribute>
+                        </xslo:value-of>
                     </z:index>
                 </xslo:if>
             </xslo:for-each>
-- 
1.7.2.5