Allow other modules to perform logic when a map is rendered via hook_farm_map_view().

modules/farm/farm_map/farm_map.api.php

@@ -21,6 +21,20 @@
  * Hooks that can be implemented by other modules in order to extend farm_map.
  */
 
+/**
+ * Perform logic when a map is viewed.
+ *
+ * @param $name
+ *   The map name.
+ * @param $element
+ *   The map element.
+ */
+function hook_farm_map_view($name, $element) {
+
+  // Add a farmOS map behavior JS file.
+  drupal_add_js(drupal_get_path('module', 'mymodule'), 'mymodule.mybehavior.js');
+}
+
 /**
  * Extract geometries from an entity.
  *

modules/farm/farm_map/farm_map.module

@@ -7,6 +7,16 @@
 include_once 'farm_map.features.inc';
 include_once 'farm_map.geo.inc';
 
+/**
+ * Implements hook_hook_info().
+ */
+function farm_map_hook_info() {
+  $hooks['farm_map_view'] = array(
+    'group' => 'farm_map',
+  );
+  return $hooks;
+}
+
 /**
  * Implements hook_permission().
  */
@@ -133,6 +143,9 @@ function theme_farm_map(&$vars) {
   // Add farm_map.css.
   drupal_add_css(drupal_get_path('module', 'farm_map') . '/css/farm_map.css');
 
+  // Allow other modules to perform logic.
+  module_invoke_all('farm_map_view', $map_name, $element);
+
   // Return a simple div with attributes.
   return '<div' . drupal_attributes($element['#attributes']) . '></div>';
 }