1 files changed, 62 insertions, 0 deletions
diff --git a/modules/system/system.js b/modules/system/system.js
index 479ecc6ea..7637109e4 100644
--- a/modules/system/system.js
+++ b/modules/system/system.js
@@ -169,5 +169,67 @@ Drupal.behaviors.pageCache = {
   },
 };
 
+/**
+ * Attach the auto machine readable name behavior.
+ *
+ * Settings are expected to be an object of elements to process, where the key
+ * defines the source element in the form and the value is an object defining
+ * the following properties:
+ * - text: The label to display before the auto-generated value.
+ * - target: The target form element name.
+ * - searchPattern: A regular expression (without modifiers) matching disallowed
+ *   characters in the machine readable name, f.e. '[^a-z0-9]+'.
+ * - replaceToken: A replacement string to replace disallowed characters, f.e.
+ *   '-' or '_'.
+ *
+ * @see menu_edit_menu()
+ */
+Drupal.behaviors.machineReadableValue = {
+  attach: function () {
+    for (var value in Drupal.settings.machineReadableValue) {
+      var settings = Drupal.settings.machineReadableValue[value];
+
+      var searchPattern = new RegExp(settings.searchPattern, 'g');
+      // Build selector for the source name entered by a user.
+      var source = '#edit-' + value;
+      var suffix = source + '-suffix';
+      // Build selector for the machine readable name.
+      var target = '#edit-' + settings.target;
+      // Build selector for the wrapper element around the target field.
+      var wrapper = '.' + settings.target + '-wrapper';
+
+      // Do not process the element if we got an error or the given name and the
+      // machine readable name are identical or the machine readable name is
+      // empty.
+      if (!$(target).hasClass('error') && ($(target).val() == $(source).val().toLowerCase().replace(searchPattern, settings.replaceToken) || $(target).val() == '')) {
+        // Hide wrapper element.
+        $(wrapper).hide();
+        // Bind keyup event to source element.
+        $(source).keyup(function () {
+          var machine = $(this).val().toLowerCase().replace(searchPattern, settings.replaceToken);
+          if (machine != '_' && machine != '') {
+            // Set machine readable name to the user entered value.
+            $(target).val(machine);
+            // Append the machine readable name and a link to edit it to the source field.
+            $(suffix).empty().append(' ' + settings.text + ': ' + machine + ' [').append($('<a href="#">' + Drupal.t('Edit') + '</a>').click(function () {
+              $(wrapper).show();
+              $(target).focus();
+              $(suffix).hide();
+              $(source).unbind('keyup');
+              return false;
+            })).append(']');
+          }
+          else {
+            $(target).val(machine);
+            $(suffix).text('');
+          }
+        });
+        // Call keyup event on source element.
+        $(source).keyup();
+      }
+    }
+  }
+};
+
 })(jQuery);