First official version.

README.txt

+// $Id$
+
+CKEDITOR LINK - A PLUGIN TO EASILY CREATE LINKS TO DRUPAL INTERNAL PATHS
+http://drupal.org/project/ckeditor_link
+
+
+
+INSTALLATION
+Please read instructions at: http://drupal.org/project/ckeditor_link
+
+
+
+CONTACT
+Henri MEDOT <henri.medot[AT]absyx[DOT]fr>
+http://www.absyx.fr

ckeditor_link.info

 ; $Id$
 name = CKEditor Link
-description = CKEditor Link.
+description = Easily create links to Drupal internal paths through CKEditor.
 core = 6.x
\ No newline at end of file

ckeditor_link.module

@@ -7,6 +7,16 @@
  * http://www.absyx.fr
  */
 
+/**
+ * Implementation of hook_init().
+ */
+function ckeditor_link_init() {
+  if (!variable_get('clean_url', 0)) {
+    module_disable(array('ckeditor_link'));
+    drupal_set_message(t('<em>CKEditor Link</em> has been disabled. <a href="!url">Clean URLs</a> need to be enabled for this module to work properly.', array('!url' => url('admin/settings/clean-urls'))), 'warning');
+  }
+}
+
 /**
  * Implementation of hook_perm().
  */
@@ -30,10 +40,10 @@ function ckeditor_link_autocomplete($string = '') {
   $matches = array();
 
   if ($string !== '') {
-    $sql = db_rewrite_sql("SELECT n.nid, n.title AS node_title, n.type AS node_type FROM {node} n WHERE n.title LIKE '%%%s%%' ORDER BY n.title, n.type");
+    $sql = db_rewrite_sql("SELECT n.nid, n.title FROM {node} n WHERE n.title LIKE '%%%s%%' ORDER BY n.title, n.type");
     $result = db_query_range($sql, array($string), 0, 10);
     while ($node = db_fetch_object($result)) {
-      $matches[$node->node_title .' ('. base_path() .'node/'. $node->nid. ')'] = '<div class="reference-autocomplete">'. check_plain($node->node_title) .'</div>';
+      $matches[$node->title .' (node/'. $node->nid. ')'] = '<div class="reference-autocomplete">'. check_plain($node->title) .'</div>';
     }
   }
 
@@ -54,9 +64,11 @@ function ckeditor_link_process_form(&$form, &$form_state) {
   if (!$added && ($js = drupal_add_js()) && isset($js['setting'])) {
     $setting = call_user_func_array('array_merge_recursive', $js['setting']);
     if (isset($setting['ckeditor']) || isset($setting['wysiwyg']['configs']['ckeditor'])) {
+      drupal_add_js('misc/autocomplete.js');
       drupal_add_js(array('ckeditor_link' => array(
         'module_path' => base_path().drupal_get_path('module', 'ckeditor_link'),
         'autocomplete_path' => url('ckeditor_link/autocomplete'),
+        'msg_invalid_path' => t('Link must be a valid Drupal path.'),
       )), 'setting');
       $added = TRUE;
     }
@@ -69,10 +81,50 @@ function ckeditor_link_process_form(&$form, &$form_state) {
  */
 function ckeditor_link_wysiwyg_plugin($editor, $version) {
   if (($editor == 'ckeditor') && user_access('access ckeditor link')) {
-    return array('drupal_link' => array(
+    return array('drupal_path' => array(
       'path' => drupal_get_path('module', 'ckeditor_link').'/plugins/link/',
       'load' => TRUE,
       'extensions' => array('Link' => t('CKEditor Link')),
     ));
   }
 }
+
+/**
+ * Implementation of hook_filter().
+ */
+function ckeditor_link_filter($op, $delta = 0, $format = -1, $text = '', $cache_id = 0) {
+  switch ($op) {
+    case 'list':
+      return array(0 => t('CKEditor Link Filter'));
+
+    case 'description':
+      return t('Converts links added through <em>CKEditor Link</em> into aliased and language prefixed URLs.');
+
+    case 'no cache':
+      return FALSE;
+
+    case 'prepare':
+      return $text;
+
+    case 'process':
+      return preg_replace_callback('`\bhref="'. preg_quote(base_path(), '`') .'node/(\d+)(?=[?#"])`', '_ckeditor_link_filter_process', $text);
+
+    default:
+      return $text;
+  }
+}
+
+function _ckeditor_link_filter_process($matches) {
+  $nid = $matches[1];
+  $options = array();
+
+  if ($lang = db_result(db_query('SELECT language FROM {node} WHERE nid = %d', $nid))) {
+    $languages = language_list('enabled');
+    $languages = $languages[1];
+    if (isset($languages[$lang])) {
+      $options['language'] = $languages[$lang];
+    }
+  }
+
+  return 'href="'. url("node/$nid", $options);
+}

plugins/link/plugin.js

@@ -29,26 +29,32 @@
     new Drupal.jsAC(input, new Drupal.ACDB(uri));
   };
 
-  CKEDITOR.plugins.add('drupal_link', {
+  var extractPath = function(value) {
+    value = CKEDITOR.tools.trim(value);
+    var match;
+    match = /\((.*?)\)$/i.exec(value);
+    if (match && match[1]) {
+      value = match[1];
+    }
+    var basePath = Drupal.settings.basePath;
+    if (value.indexOf(basePath) == 0) {
+      value = value.substr(basePath.length);
+    }
+    if (/^node\/\d+$/.test(value)) {
+      return value;
+    }
+    return false;
+  };
+
+  CKEDITOR.plugins.add('drupal_path', {
 
     init: function(editor, pluginPath) {
       CKEDITOR.on('dialogDefinition', function(e) {
         if ((e.editor != editor) || (e.data.name != 'link')) return;
 
-        // Overrides definition.
+        // Overrides linkType definition.
         var definition = e.data.definition;
         var infoTab = definition.getContents('info');
-/*
-        definition.onShow = CKEDITOR.tools.override(definition.onShow, function(original) {
-          return function() {
-            original.call(this);
-          };
-        });
-        definition.onOk = function() {
-          
-        };
-*/
-        // Overrides linkType definition.
         var content = getById(infoTab.elements, 'linkType');
         content.items.unshift(['Drupal', 'drupal']);
         content['default'] = 'drupal';
@@ -57,21 +63,32 @@
           id: 'drupalOptions',
           children: [{
             type: 'text',
-            id: 'drupal_link',
+            id: 'drupal_path',
             label: editor.lang.link.title,
             required: true,
             onLoad: function() {
               this.getInputElement().addClass('form-autocomplete');
               initAutocomplete(this.getInputElement().$, Drupal.settings.ckeditor_link.autocomplete_path);
             },
+            setup: function(data) {
+              this.setValue(data.drupal_path || '');
+            },
             validate: function() {
               var dialog = this.getDialog();
               if (dialog.getValueOf('info', 'linkType') != 'drupal') {
                 return true;
               }
               var func = CKEDITOR.dialog.validate.notEmpty(editor.lang.link.noUrl);
-              return func.apply(this);
-            }
+              if (!func.apply(this)) {
+                return false;
+              }
+              if (!extractPath(this.getValue())) {
+                alert(Drupal.settings.ckeditor_link.msg_invalid_path);
+                this.focus();
+                return false;
+              }
+              return true;
+            },
           }]
         });
         content.onChange = CKEDITOR.tools.override(content.onChange, function(original) {
@@ -98,6 +115,14 @@
           if (!data.type || (data.type == 'url') && !data.url) {
             data.type = 'drupal';
           }
+          else if (data.url && !data.url.protocol && data.url.url) {
+            var path = extractPath(data.url.url);
+            if (path) {
+              data.type = 'drupal';
+              data.drupal_path = path;
+              delete data.url;
+            }
+          }
           this.setValue(data.type);
         };
         content.commit = function(data) {
@@ -105,9 +130,8 @@
           if (data.type == 'drupal') {
             data.type = 'url';
             var dialog = this.getDialog();
-            dialog.getContentElement('info', 'protocol').setValue('');
-            var match = /\((.*?)\)\s*$/i.exec(dialog.getContentElement('info', 'drupal_link').getValue());
-            dialog.getContentElement('info', 'url').setValue(match && match[1]);
+            dialog.setValueOf('info', 'protocol', '');
+            dialog.setValueOf('info', 'url', Drupal.settings.basePath + extractPath(dialog.getValueOf('info', 'drupal_path')));
           }
         };
       });