Restored visibility of preview tab.

config/vufind/config.ini

@@ -766,7 +766,7 @@ url = "https://api.vlb.de/api/v1/cover/"
 ; Tab makes a tab with an embedded preview appear on record view
 ; Default is "GoogleOptions['link'] = full,partial" if nothing
 ; is set here.
-; see code.google.com/apis/books/docs/dynamic-links.html#JSONformat
+; see https://developers.google.com/books/docs/dynamic-links#json-results-format
 ;GoogleOptions['link']  = full,partial
 ;GoogleOptions['tab']  = partial
 

module/VuFind/src/VuFind/RecordTab/Factory.php

@@ -195,19 +195,14 @@ class Factory
         // and googleoptions[tab] is not empty.
         $active = false;
         if (isset($cfg->Content->previews)) {
-            $content_previews = explode(
-                ',', strtolower(str_replace(' ', '', $cfg->Content->previews))
+            $previews = array_map(
+                'trim', explode(',', strtolower($cfg->Content->previews))
             );
-            if (in_array('google', $content_previews)
-                && isset($cfg->Content->GoogleOptions)
+            if (in_array('google', $previews)
+                && isset($cfg->Content->GoogleOptions['tab'])
+                && strlen(trim($cfg->Content->GoogleOptions['tab'])) > 0
             ) {
-                $g_options = $cfg->Content->GoogleOptions;
-                if (isset($g_options->tab)) {
-                    $tabs = explode(',', $g_options->tab);
-                    if (count($tabs) > 0) {
-                        $active = true;
-                    }
-                }
+                $active = true;
             }
         }
         return new Preview($active);

module/VuFind/src/VuFind/RecordTab/Preview.php

@@ -93,4 +93,15 @@ class Preview extends AbstractBase
         // until there is content
         return false;
     }
+
+    /**
+     * Can this tab be loaded via AJAX?
+     *
+     * @return bool
+     */
+    public function supportsAjax()
+    {
+        // No, Google script magic required
+        return false;
+    }
 }

themes/bootstrap3/js/preview.js

@@ -68,7 +68,7 @@ function processGBSBookInfo(booksInfo) {
                 if (viewOptions['tab'].indexOf(bookInfo.preview)>= 0
                 && (bookInfo.embeddable)) {
                     // make tab visible
-                    $('ul.recordTabs li.hidden a#preview').parent().removeClass('hidden');
+                    $('ul.nav-tabs li.hidden a.preview').parent().removeClass('hidden');
                 }
             }
         }

themes/bootstrap3/templates/RecordTab/preview.phtml

@@ -6,4 +6,4 @@
     $this->headScript()->appendFile('https://www.google.com/jsapi');
     $this->headScript()->appendFile('embedGBS.js');
 ?>
-<div id="gbsViewer" ></div>
+<div id="gbsViewer" style="height: 600px;"></div>