Method LoadEngines

cpp/imehandler/linux/src/ibushandler.cpp:192–229

* Sets the engines to be loaded by the ibus daemon, only those set via this * method can be then activated. * Note that there is a slight delay between the configuration values being set * and the actual propagation into the ibus daemon (accessed via bus_ member), * so direct call to GetInstalledEngines just after this method could return * past results for isntance. A 1 second pause (see tes

 * past results for isntance. A 1 second pause (see tests) is generally enough.
 */
int IBusHandler::LoadEngines(const std::vector<std::string>& engine_names) {
  int nb_loaded_engines = 0;

  if (! ibus_available_) {
    return nb_loaded_engines;
  }

  // We want to avoid strange states where no engines are loaded, hence we
  // simply ignore the call if an empty vector is passed as parameter.
  if (!engine_names.empty()) {
    GValue gvalue = {0};
    g_value_init(&gvalue, G_TYPE_VALUE_ARRAY);
    // TODO: Where is the array freed?
    GValueArray* array = g_value_array_new(engine_names.size());
    std::vector<std::string> available_engines = GetAvailableEngines();
    for (std::vector<std::string>::const_iterator it = engine_names.begin() ;
         it != engine_names.end() ; ++it) {
      // We load the engines only if they are installed on the system.
      if (std::find(available_engines.begin(), available_engines.end(), *it) !=
          available_engines.end()) {
        GValue array_element = {0};
        g_value_init(&array_element, G_TYPE_STRING);
        g_value_set_string(&array_element, it->c_str());
        g_value_array_append(array, &array_element);
        ++nb_loaded_engines;
      }
    }
    // If we made at least one change, then we override the current
    // configuration.
    if (nb_loaded_engines > 0) {
      g_value_take_boxed(&gvalue, array);
      IBusConfig* conf = ibus_bus_get_config(bus_);
      ibus_config_set_value(conf, "general", "preload_engines", &gvalue);
    }
    g_value_unset(&gvalue);
  }
  return nb_loaded_engines;
}

/*
 * Sets the engine designed by its name to be the global engine