Bug 8163: Click to populate XSLT preferences with "default" or empty values

This patch adds markup and JavaScript to the system preferences
interface so that the user can click "default" or "empty" to populate
an XSLT-related pref with those vaules.

To test, open system preferences for the OPAC or staff client. In
the description for an XSLT-related preference click the "default"
link to populate the field with "default." Click the "leave empty"
link to empty the field.

Revised according to Julian Maurice's suggestion for a more
generic, flexible way to implement it.

Signed-off-by: Melia Meggs <melia@test.bywatersolutions.com>
Passed-QA-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>

koha-tmpl/intranet-tmpl/prog/en/js/pages/preferences.js

@@ -59,6 +59,16 @@ $( document ).ready( function () {
         mark_modified.call(this);
     } );
 
+    $(".set_syspref").click(function() {
+        var s = $(this).attr('data-syspref');
+        var v = $(this).attr('data-value');
+        // populate the input with the value in data-value
+        $("#pref_"+s).val(v);
+        // pass the DOM element to trigger "modified" to enable submit button
+        mark_modified.call($("#pref_"+s)[0]);
+        return false;
+    });
+
     window.onbeforeunload = function () {
         if ( KOHA.Preferences.Modified ) {
             return MSG_MADE_CHANGES;

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref

@@ -59,12 +59,12 @@ OPAC:
             - 'Display OPAC results using XSLT stylesheet at: '
             - pref: OPACXSLTResultsDisplay
               class: file
-            - '<br />Options:<br />- leave empty for "no xslt"<br />- enter "default" for the default one<br />- put a path to define a xslt file<br />- put an URL for an external specific stylesheet.<br />{langcode} will be replaced with current interface language'
+            - '<br />Options:<ul><li><a href="#" class="set_syspref" data-syspref="OPACXSLTResultsDisplay" data-value="">Leave empty</a> for "no xslt"</li><li>enter "<a href="#" class="set_syspref" data-syspref="OPACXSLTResultsDisplay" data-value="default">default</a>" for the default one</li><li> put a path to define a xslt file</li><li>put an URL for an external specific stylesheet.</li></ul>{langcode} will be replaced with current interface language'
         -
             - 'Display OPAC details using XSLT stylesheet at: '
             - pref: OPACXSLTDetailsDisplay
               class: file
-            - '<br />Options:<br />- leave empty for "no xslt"<br />- enter "default" for the default one<br />- put a path to define a xslt file<br />- put an URL for an external specific stylesheet.<br />{langcode} will be replaced with current interface language'
+            - '<br />Options:<ul><li><a href="#" class="set_syspref" data-syspref="OPACXSLTDetailsDisplay" data-value="">Leave empty</a> for "no xslt"</li><li>enter "<a href="#" class="set_syspref" data-syspref="OPACXSLTDetailsDisplay" data-value="default">default</a>" for the default one</li><li>put a path to define a xslt file</li><li>put an URL for an external specific stylesheet.</li></ul>{langcode} will be replaced with current interface language'
         -
             - On pages displayed with XSLT stylesheets on the OPAC,
             - pref: DisplayOPACiconsXSLT

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/staff_client.pref

@@ -59,12 +59,12 @@ Staff Client:
             - 'Display results in the staff client using XSLT stylesheet at: '
             - pref: XSLTResultsDisplay
               class: file
-            - '<br />Options:<br />- leave empty for "no xslt"<br />- enter "default" for the default one<br />- put a path to define a xslt file<br />- put an URL for an external specific stylesheet.<br />{langcode} will be replaced with current interface language'
+            - '<br />Options:<ul><li><a href="#" class="set_syspref" data-syspref="XSLTResultsDisplay" data-value="">Leave empty</a> for "no xslt"</li><li>enter "<a href="#" class="set_syspref" data-syspref="XSLTResultsDisplay" data-value="default">default</a>" for the default one</li><li> put a path to define a xslt file</li><li>put an URL for an external specific stylesheet.</li></ul>{langcode} will be replaced with current interface language'
         -
             - 'Display details in the staff client using XSLT stylesheet at: '
             - pref: XSLTDetailsDisplay
               class: file
-            - '<br />Options:<br />- leave empty for "no xslt"<br />- enter "default" for the default one<br />- put a path to define a xslt file<br />- put an URL for an external specific stylesheet.<br />{langcode} will be replaced with current interface language'
+            - '<br />Options:<ul><li><a href="#" class="set_syspref" data-syspref="XSLTDetailsDisplay" data-value="">Leave empty</a> for "no xslt"</li><li>enter "<a href="#" class="set_syspref" data-syspref="XSLTDetailsDisplay" data-value="default">default</a>" for the default one</li><li>put a path to define a xslt file</li><li>put an URL for an external specific stylesheet.</li></ul>{langcode} will be replaced with current interface language'
         -
             - Use the Yahoo UI libraries
             - pref: yuipath