Issue #135: Add importcss feature for styles dropdown (#136)

tinymce.admin.inc

@@ -54,7 +54,7 @@ function _tinymce_settings_form(array &$form, array $form_state, $format) {
     '#attributes' => array(
       'placeholder' => '/core/themes/basis/css/skin.css',
     ),
-    '#description' => t('Add URLs to CSS files, the editor should use to display its content, one file per line.'),
+    '#description' => t('Add URLs to CSS files, the editor should use to display its content, one file per line.<br>If a file is named <code>tinymce-styles-dropdown.css</code>, this file additionally gets parsed for items to append to the toolbar styles dropdown.'),
   );
 
   $elements['tabs']['image_browser'] = array(

tinymce.module

@@ -174,6 +174,16 @@ function _tinymce_js_settings($format, array $existing_settings) {
   $options['tiny_options']['skin'] = $settings['tinymce_settings']['skin'];
   $options['tiny_options']['content_css'] = _tinymce_get_content_css($settings['tinymce_settings']);
 
+  // If that specific file is also part of content CSS, let Tiny parse it.
+  if (count($options['tiny_options']['content_css']) > 1) {
+    $parse_file_found = preg_grep('#tinymce-styles-dropdown\.css$#', $options['tiny_options']['content_css']);
+    if (!empty($parse_file_found)) {
+      $options['tiny_options']['plugins'] .= ' importcss';
+      $options['tiny_options']['importcss_file_filter'] = 'tinymce-styles-dropdown.css';
+      $options['tiny_options']['importcss_append'] = TRUE;
+    }
+  }
+
   // Collect additional TinyMCE plugins from hook.
   $external_plugins = module_invoke_all('tinymce_external_plugins', $format);
   $icon_registry = array();