first import

sites/all/modules/context/plugins/context_reaction_debug.inc

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * Output context debug information.
+ */
+class context_reaction_debug extends context_reaction {
+  function options_form($context) {
+    return array('debug' => array('#type' => 'value', '#value' => TRUE));
+  }
+
+  function options_form_submit($values) {
+    return array('debug' => 1);
+  }
+
+  /**
+   * Output a list of active contexts.
+   */
+  function execute() {
+    $contexts = context_active_contexts();
+    foreach ($contexts as $context) {
+      if (!empty($context->reactions['debug'])) {
+        if (user_access('administer site configuration') && module_exists('context_ui')) {
+          $name = l($context->name, "admin/structure/context/list/{$context->name}", array('query' => array('destination' => $_GET['q'])));
+        }
+        else {
+          $name = check_plain($context->name);
+        }
+        drupal_set_message(t("Active context: !name", array('!name' => $name)));
+      }
+    }
+  }
+}