Add base_url keyword

advanced_help.module

@@ -444,6 +444,8 @@ function advanced_help_view_topic($module, $topic, $popup = FALSE) {
     // @todo is this trusted output?
     $output = file_get_contents($file);
     // Make some exchanges.
+
+    // Change 'topic:' to the URL for another help topic.
     if ($popup) {
       $output = preg_replace('/href="topic:([^"]+)"/', 'href="' . url('help/$1', array('query' => 'popup=true')) . '"', $output);
       $output = preg_replace('/src="topic:([^"]+)"/', 'src="' . url('help/$1', array('query' => 'popup=true')) . '"', $output);
@@ -455,9 +457,14 @@ function advanced_help_view_topic($module, $topic, $popup = FALSE) {
 
     global $base_path;
 
+    // Change 'path:' to the URL to the base help directory.
     $output = preg_replace('/href="path:([^"]+)"/', 'href="' . $base_path . $info['path'] . '/$1"', $output);
     $output = preg_replace('/src="path:([^"]+)"/', 'src="' . $base_path . $info['path'] . '/$1"', $output);
 
+    // Change 'base_url:' to the URL to the site.
+    $output = preg_replace('/href="base_url:([^"]+)"/', 'href="' . url('$1') . '"', $output);
+    $output = preg_replace('/src="base_url:([^"]+)"/', 'src="' . url('$1') . '"', $output);
+
     return '<div class="advanced-help-topic">' . $output . '</div>';
   }
 }

help/using-advanced-help.html

@@ -33,6 +33,8 @@ format will ensure the popup status remains consistent when switching between li
 <p>Use <strong>&lt;a href=&quot;path:example.jpg"&gt;</strong> to reference items 
 within the help directory, such as images you wish to embed within the help text.</p>
 
-<p>If the search module is enabled, the contents of help system will be indexed on cron. If you enable new modules and wish to immediately index its help text, visit the "Administration -> Reports -> Status report" and manually click the "Run cron manually" link.</p>
+<p>Use <strong>&lt;a href=&quot;base_url:admin/settings/site-configuration"&gt;</strong> to reference any normal path in the site.</p>
+
+<p>If the search module is enabled, the contents of help system will be indexed on cron. If you enable new modules and wish to immediately index its help text, visit the "Administration -> Reports -> Status report" and click the "Run cron manually" link.</p>
 
 <p>Example: <a href="path:nowhere.jpg">Don't click this!</a></p>