#335281 by thePanz, jcfiala, stella, Digidog: committed patch by stella...

#335281 by thePanz, jcfiala, stella, Digidog: committed patch by stella #comment-4929778 for title attribute support.

link.module

@@ -173,6 +173,20 @@ function link_field_instance_settings_form($field, $instance) {
     '#description' => t('When output, this link will have have this class attribute. Multiple classes should be separated by spaces.'),
     '#default_value' => empty($instance['settings']['attributes']['class']) ? '' : $instance['settings']['attributes']['class'],
   );
+  $form['attributes']['configurable_title'] = array(
+    '#title' => t("Allow the user to enter a link 'title' attribute"),
+    '#type' => 'checkbox',
+    '#default_value' => empty($instance['settings']['attributes']['configurable_title']) ? '' : $instance['settings']['attributes']['configurable_title'],
+  );
+  $form['attributes']['title'] = array(
+    '#title' => t("Default link 'title' Attribute"),
+    '#type' => 'textfield',
+    '#description' => t('When output, links will use this "title" attribute if the user does not provide one and when different from the link text. Read <a href="http://www.w3.org/TR/WCAG10-HTML-TECHS/#links">WCAG 1.0 Guidelines</a> for links comformances. Tokens values will be evaluated.'),
+    '#default_value' => empty($instance['settings']['attributes']['title']) ? '' : $instance['settings']['attributes']['title'],
+    '#field_prefix' => 'title = "',
+    '#field_suffix' => '"',
+    '#size' => 20,
+  );
   return $form;
 }
 
@@ -468,6 +482,19 @@ function _link_sanitize(&$item, $delta, &$field, $instance, &$node) {
     $item['attributes']['rel'] = str_replace('nofollow', '', $item['attributes']);
   }
 
+  // Handle "title" link attribute.
+  if (!empty($item['attributes']['title']) && module_exists('token')) {
+    // Load the node (necessary for nodes in views).
+    $token_node = isset($node->nid) ? node_load($node->nid) : $node;
+    $item['attributes']['title'] = filter_xss(token_replace($item['attributes']['title'], array('node' => $token_node)),
+                        array('b', 'br', 'code', 'em', 'i', 'img', 'span', 'strong', 'sub', 'sup', 'tt', 'u'));
+  }
+  // Remove title attribute if it's equal to link text.
+  if ($item['attributes']['title'] == $item['title']) {
+    unset($item['attributes']['title']);
+  }
+  unset($item['attributes']['configurable_title']);
+
   // Remove empty attributes.
   $item['attributes'] = array_filter($item['attributes']);
 
@@ -541,6 +568,9 @@ function theme_link_field($vars) {
   if (!empty($element['attributes']['target'])) {
     $output .= '<div class="link-attributes">'. drupal_render($element['attributes']['target']) .'</div>';
   }
+  if (!empty($element['attributes']['title'])) {
+    $output .= '<div class="link-attributes">'. drupal_render($element['attributes']['title']) .'</div>';
+  }
   return $output;
 }
 
@@ -609,6 +639,15 @@ function link_field_process($element, $form_state, $complete_form) {
       '#default_value' => isset($attributes['target']) ? $attributes['target'] : FALSE,
     );
   }
+  if (!empty($settings['attributes']['configurable_title']) && $settings['attributes']['configurable_title'] == 1) {
+    $element['attributes']['title'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Link "title" attribute'),
+      '#default_value' => isset($attributes['title']) ? $attributes['title'] : '',
+      '#field_prefix' => 'title = "',
+      '#field_suffix' => '"',
+    );
+  }
   return $element;
 }