1 files changed, 96 insertions, 5 deletions

diff --git a/modules/locale/locale.api.php b/modules/locale/locale.api.php
index 5d0852b51..b1805e2e0 100644
--- a/modules/locale/locale.api.php
+++ b/modules/locale/locale.api.php
@@ -25,20 +25,23 @@ function hook_locale($op = 'groups') {
 }
 
 /**
- * Perform alterations on translation links.
+ * Perform alterations on language switcher links.
  *
- * A translation link may need to point to a different path or use a translated
- * link text before going through l(), which will just handle the path aliases.
+ * A language switcher link may need to point to a different path or use a
+ * translated link text before going through l(), which will just handle the
+ * path aliases.
  *
  * @param $links
  *   Nested array of links keyed by language code.
+ * @param $type
+ *   The language type the links will switch.
  * @param $path
  *   The current path.
  */
-function hook_translation_link_alter(array &$links, $path) {
+function hook_language_switch_link_alter(array &$links, $type, $path) {
   global $language;
 
-  if (isset($links[$language])) {
+  if ($type == LANGUAGE_TYPE_CONTENT && isset($links[$language])) {
     foreach ($links[$language] as $link) {
       $link['attributes']['class'][] = 'active-language';
     }
@@ -46,5 +49,93 @@ function hook_translation_link_alter(array &$links, $path) {
 }
 
 /**
+ * Allow modules to define their own language types.
+ *
+ * @return
+ *   An array of language type definitions. Each language type has an identifier
+ *   key. The language type definition is an associative array that may contain
+ *   the following key-value pairs:
+ *   - "name": The human-readable language type identifier.
+ *   - "description": A description of the language type.
+ */
+function hook_language_types_info() {
+  return array(
+    'custom_language_type' => array(
+      'name' => t('Custom language'),
+      'description' => t('A custom language type.'),
+    ),
+  );
+}
+
+/**
+ * Perform alterations on language types.
+ *
+ * @param $language_types
+ *   Array of language type definitions.
+ */
+function hook_language_types_info_alter(array &$language_types) {
+  if (isset($language_types['custom_language_type'])) {
+    $language_types['custom_language_type_custom']['description'] = t('A far better description.');
+  }
+}
+
+/**
+ * Allow modules to define their own language providers.
+ *
+ * @return
+ *   An array of language provider definitions. Each language provider has an
+ *   identifier key. The language provider definition is an associative array
+ *   that may contain the following key-value pairs:
+ *   - "types": An array of allowed language types. If a language provider does
+ *     not specify which language types it should be used with, it will be
+ *     available for all the configurable language types.
+ *   - "callbacks": An array of functions that will be called to perform various
+ *     tasks. Possible key-value pairs are:
+ *     - "language": Required. The callback that will determine the language
+ *       value.
+ *     - "switcher": The callback that will determine the language switch links
+ *       associated to the current language provider.
+ *     - "url_rewrite": The callback that will provide URL rewriting.
+ *   - "file": A file that will be included before the callback is invoked; this
+ *     allows callback functions to be in separate files.
+ *   - "weight": The default weight the language provider has.
+ *   - "name": A human-readable identifier.
+ *   - "description": A description of the language provider.
+ *   - "config": An internal path pointing to the language provider
+ *     configuration page.
+ *   - "cache": The value Drupal's page cache should be set to for the current
+ *     language provider to be invoked.
+ */
+function hook_language_negotiation_info() {
+  return array(
+    'custom_language_provider' => array(
+      'callbacks' => array(
+        'language' => 'custom_language_provider_callback',
+        'switcher' => 'custom_language_switcher_callback',
+        'url_rewrite' => 'custom_language_url_rewrite_callback',
+      ),
+      'file' => drupal_get_path('module', 'custom') . '/custom.module',
+      'weight' => -4,
+      'types' => array('custom_language_type'),
+      'name' => t('Custom language provider'),
+      'description' => t('This is a custom language provider.'),
+      'cache' => CACHE_DISABLED,
+    ),
+  );
+}
+
+/**
+ * Perform alterations on language providers.
+ *
+ * @param $language_providers
+ *   Array of language provider definitions.
+ */
+function hook_language_negotiation_info_alter(array &$language_providers) {
+  if (isset($language_providers['custom_language_provider'])) {
+    $language_providers['custom_language_provider']['config'] = 'admin/config/regional/language/configure/custom-language-provider';
+  }
+}
+
+/**
  * @} End of "addtogroup hooks".
  */