Bug 10564 - use OPACURLOpenInNewWindow in UNIMARCslim2OPACResults.xsl

When using UNIMARC XSLT for OPAC detail page, if record has an 856$u,
its content is displayed as a link. The syspref OPACURLOpenInNewWindow
adds the option of opening in a new window (attribute target="_blank").

856$u is also used in UNIMARC results XSLT but the use of
OPACURLOpenInNewWindow syspref is missing. It exists for MARC21.

This patch adds the use of OPACURLOpenInNewWindow in UNIMARCslim2OPACResults.xsl.

Test plan :
- In a UNIMARC catalog, enable XSLT for OPAC results page
- Create a record with a link in 856$u and set second indicator to 0
- Set OPACURLOpenInNewWindow syspref on
- At OPAC, perform a search that contains the record
=> You should see the link : "Click here to access online"
- click on it
=> You shoud get to a new window (or tab depending on your browser configuration)
- Set OPACURLOpenInNewWindow syspref off
- re-perform the search
- click on the link
=> You shoud stay in same window

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>

Comment: Work as described, no koha-qa errors
Tested following plan after applying patch

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
XSLT change only, works as described.
To test: Catalog 856$u and $a, 2nd indicator = 0.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>

koha-tmpl/opac-tmpl/prog/en/xslt/UNIMARCslim2OPACResults.xsl

@@ -28,6 +28,7 @@
 
   <xsl:variable name="hidelostitems" select="marc:sysprefs/marc:syspref[@name='hidelostitems']"/>
   <xsl:variable name="singleBranchMode" select="marc:sysprefs/marc:syspref[@name='singleBranchMode']"/>
+  <xsl:variable name="OPACURLOpenInNewWindow" select="marc:sysprefs/marc:syspref[@name='OPACURLOpenInNewWindow']"/>
 
   <xsl:if test="marc:datafield[@tag=200]">
     <xsl:for-each select="marc:datafield[@tag=200]">
@@ -109,6 +110,9 @@
                 <xsl:attribute name="href">
                   <xsl:value-of select="marc:subfield[@code='u']"/>
                 </xsl:attribute>
+                <xsl:if test="$OPACURLOpenInNewWindow='1'">
+                    <xsl:attribute name="target">_blank</xsl:attribute>
+                </xsl:if>
                 <xsl:choose>
                   <xsl:when test="marc:subfield[@code='y' or @code='3' or @code='z']">
                     <xsl:call-template name="subfieldSelect">