[glom] Document: Added get_translation_available_locales().

[Murray Cumming <murrayc src gnome org>]

commit a6a94195ad1dd745b492f5ab3b545ac95ab4c53b
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Dec 14 15:48:12 2011 +0100

    Document: Added get_translation_available_locales().
    
    * glom/libglom/document/document.[h|cc]: load_after(),
    load_after_translations(): Remember any new locales encountered, so
    that get_translation_available_locales() can later return the list.
    This could help with OnlineGlom bug #666165 .
    * tests/test_document_load_translations.cc: Test the new method.

 ChangeLog                                |   10 ++++++++++
 glom/libglom/document/document.cc        |   16 +++++++++++++++-
 glom/libglom/document/document.h         |    6 ++++++
 tests/test_document_load_translations.cc |    4 ++++
 4 files changed, 35 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 853b1f4..d49c9e3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2011-12-14  Murray Cumming  <murrayc murrayc com>
+
+	Document: Added get_translation_available_locales().
+
+	* glom/libglom/document/document.[h|cc]: load_after(), 
+	load_after_translations(): Remember any new locales encountered, so 
+	that get_translation_available_locales() can later return the list.
+	This could help with OnlineGlom bug #666165 .		
+	* tests/test_document_load_translations.cc: Test the new method.
+
 2011-12-13  Murray Cumming  <murrayc murrayc com>
 
 	Correct parsing of example data.
diff --git a/glom/libglom/document/document.cc b/glom/libglom/document/document.cc
index 9079e70..92a5fc1 100644
--- a/glom/libglom/document/document.cc
+++ b/glom/libglom/document/document.cc
@@ -2528,6 +2528,13 @@ void Document::load_after_translations(const xmlpp::Element* element, Translatab
         const Glib::ustring locale = get_node_attribute_value(element, GLOM_ATTRIBUTE_TRANSLATION_LOCALE);
         const Glib::ustring translation = get_node_attribute_value(element, GLOM_ATTRIBUTE_TRANSLATION_VALUE);
         item.set_translation(locale, translation);
+
+        //Remember any new translation locales in our cached list:
+        if(std::find(m_translation_available_locales.begin(), 
+          m_translation_available_locales.end(), locale) == m_translation_available_locales.end())
+        {
+          m_translation_available_locales.push_back(locale);
+        }
       }
     }
   }
@@ -2584,6 +2591,8 @@ bool Document::load_after(int& failure_code)
 
   if(result)
   {
+    m_translation_available_locales.clear();
+
     const xmlpp::Element* nodeRoot = get_node_document();
     if(nodeRoot)
     {
@@ -2604,6 +2613,7 @@ bool Document::load_after(int& failure_code)
 
       m_translation_original_locale = get_node_attribute_value(nodeRoot, GLOM_ATTRIBUTE_TRANSLATION_ORIGINAL_LOCALE);
       TranslatableItem::set_original_locale(m_translation_original_locale);
+      m_translation_available_locales.push_back(m_translation_original_locale); //Just a cache.
 
       const xmlpp::Element* nodeConnection = get_node_child_named(nodeRoot, GLOM_NODE_CONNECTION);
       if(nodeConnection)
@@ -4321,12 +4331,16 @@ void Document::set_translation_original_locale(const Glib::ustring& locale)
   set_modified();
 }
 
-
 Glib::ustring Document::get_translation_original_locale() const
 {
   return m_translation_original_locale;
 }
 
+std::vector<Glib::ustring> Document::get_translation_available_locales() const
+{
+  return m_translation_available_locales;
+}
+
 Document::type_list_translatables Document::get_translatable_layout_items(const Glib::ustring& table_name)
 {
   type_list_translatables result;
diff --git a/glom/libglom/document/document.h b/glom/libglom/document/document.h
index 3ed7d25..117f7f1 100644
--- a/glom/libglom/document/document.h
+++ b/glom/libglom/document/document.h
@@ -174,6 +174,11 @@ public:
    */
   Glib::ustring get_translation_original_locale() const;
 
+  /** Get a list of locales for which at least one string is translated.
+   * The result will include the original, from get_translation_original_locale().
+   */
+  std::vector<Glib::ustring> get_translation_available_locales() const;
+
   typedef std::vector< sharedptr<Relationship> > type_vec_relationships;
   type_vec_relationships get_relationships(const Glib::ustring& table_name, bool plus_system_prefs = false) const;
   void set_relationships(const Glib::ustring& table_name, const type_vec_relationships& vecRelationships);
@@ -636,6 +641,7 @@ private:
 
   Glib::ustring m_database_title;
   Glib::ustring m_translation_original_locale;
+  std::vector<Glib::ustring> m_translation_available_locales; //Just a cache, based on other data.
 
   typedef std::map<Glib::ustring, Glib::ustring> type_map_library_scripts;
   type_map_library_scripts m_map_library_scripts;
diff --git a/tests/test_document_load_translations.cc b/tests/test_document_load_translations.cc
index 3b27408..d73c598 100644
--- a/tests/test_document_load_translations.cc
+++ b/tests/test_document_load_translations.cc
@@ -135,6 +135,10 @@ int main()
     return EXIT_FAILURE;
   }
 
+  const std::vector<Glib::ustring> locales = document.get_translation_available_locales();
+  g_assert(locales.size() == 3);
+  g_assert(contains(locales, "de_DE"));
+
   const std::vector<Glib::ustring> table_names = document.get_table_names();
   g_assert(contains(table_names, "scenes"));