UI locale dbus

rust/agama-dbus-server/src/locale.rs

@@ -1,14 +1,15 @@
 use crate::error::Error;
 use agama_lib::connection_to;
 use anyhow::Context;
-use std::process::Command;
+use std::{process::Command, fs::read_dir};
 use zbus::{dbus_interface, Connection};
 
 pub struct Locale {
     locales: Vec<String>,
     keymap: String,
     timezone_id: String,
     supported_locales: Vec<String>,
+    ui_locale: String,
 }
 
 #[dbus_interface(name = "org.opensuse.Agama.Locale1")]
@@ -89,6 +90,40 @@ impl Locale {
         Ok(())
     }
 
+
+    #[dbus_interface(property, name="UILocale")]
+    fn ui_locale(&self) -> &str {
+        &self.ui_locale
+    }
+
+    #[dbus_interface(property, name="UILocale")]
+    fn set_ui_locale(&mut self, locale: &str) {
+         self.ui_locale = locale.to_string();
+    }
+
+    /// Gets list of locales available on system.
+    /// 
+    /// # Examples
+    /// 
+    /// ```
+    ///   use agama_dbus_server::locale::Locale;
+    ///   let locale = Locale::new();
+    ///   assert!(locale.list_ui_locales().unwrap().len() > 0);
+    /// ```
+    #[dbus_interface(name = "ListUILocales")]
+    pub fn list_ui_locales(&self) -> Result<Vec<String>, Error> {
+        // english is always available ui localization
+        let mut result = vec!["en".to_string()];
+        const DIR : &str = "/usr/share/YaST2/locale/";
+        let entries = read_dir(DIR).context("Reading YaST2 locale")?;
+        for entry in entries {
+            let entry = entry.context("Failed to read entry in YaST2 locale dir")?;
+            result.push(entry.file_name().to_str().context("Non UTF entry found in YaST2 locale dir")?.to_string());
+        }
+
+        Ok(result)
+    }
+
     /* support only keymaps for console for now
         fn list_x11_keyboards(&self) -> Result<Vec<(String, String)>, Error> {
             let keyboards = agama_locale_data::get_xkeyboards()?;
@@ -176,12 +211,13 @@ impl Locale {
 }
 
 impl Locale {
-    fn new() -> Self {
+    pub fn new() -> Self {
         Self {
             locales: vec!["en_US.UTF-8".to_string()],
             keymap: "us".to_string(),
             timezone_id: "America/Los_Angeles".to_string(),
             supported_locales: vec!["en_US.UTF-8".to_string()],
+            ui_locale: "en".to_string()
         }
     }
 }

service/lib/agama/dbus/clients/locale.rb

@@ -26,6 +26,8 @@ module DBus
     module Clients
       # D-Bus client for locale configuration
       class Locale < Base
+        INTERFACE_NAME = "org.opensuse.Agama.Locale1"
+
         def initialize
           super
 
@@ -44,6 +46,18 @@ def supported_locales=(locales)
           dbus_object.supported_locales = locales
         end
 
+        def ui_locale
+          dbus_object[INTERFACE_NAME]["UILocale"]
+        end
+
+        def ui_locale=(locale)
+          dbus_object[INTERFACE_NAME]["UILocale"] = locale
+        end
+
+        def available_ui_locales
+          dbus_object.ListUILocales
+        end
+
         # Finishes the language installation
         def finish
           dbus_object.Commit
@@ -58,7 +72,20 @@ def finish
         def on_language_selected(&block)
           on_properties_change(dbus_object) do |_, changes, _|
             languages = changes["Locales"]
-            block.call(languages)
+            block.call(languages) if languages
+          end
+        end
+
+        # Registers a callback to run when the ui locale changes
+        #
+        # @note Signal subscription is done only once. Otherwise, the latest subscription overrides
+        #   the previous one.
+        #
+        # @param block [Proc] Callback to run when an ui locale changes
+        def on_ui_locale_change(&block)
+          on_properties_change(dbus_object) do |_, changes, _|
+            locale = changes["UILocale"]
+            block.call(locale) if locale
           end
         end
 

service/lib/agama/dbus/manager_service.rb

@@ -24,9 +24,11 @@
 require "agama/users"
 require "agama/cockpit_manager"
 require "agama/dbus/bus"
+require "agama/dbus/clients/locale"
 require "agama/dbus/manager"
 require "agama/dbus/users"
 require "agama/dbus/storage/proposal"
+require "agama/ui_locale"
 
 module Agama
   module DBus
@@ -76,6 +78,10 @@ def initialize(config, logger = nil)
       # @note The service runs its startup phase
       def start
         setup_cockpit
+        # We need locale for data from users
+        locale_client = Clients::Locale.new
+        # TODO: test if we need to pass block with additional actions
+        @ui_locale = UILocale.new(locale_client)
         export
         manager.on_progress_change { dispatch } # make single thread more responsive
         manager.startup_phase

service/lib/agama/dbus/software_service.rb

@@ -21,8 +21,10 @@
 
 require "dbus"
 require "agama/dbus/bus"
+require "agama/dbus/clients/locale"
 require "agama/dbus/software"
 require "agama/software"
+require "agama/ui_locale"
 
 module Agama
   module DBus
@@ -48,6 +50,14 @@ def initialize(config, logger = nil)
         @backend.on_progress_change { dispatch }
       end
 
+      # Starts software service. It does more then just #export method.
+      def start
+        locale_client = Clients::Locale.new
+        # TODO: test if we need to pass block with additional actions
+        @ui_locale = UILocale.new(locale_client)
+        export
+      end
+
       # Exports the software object through the D-Bus service
       def export
         dbus_objects.each { |o| service.export(o) }

service/lib/agama/dbus/storage_service.rb

@@ -21,8 +21,10 @@
 
 require "dbus"
 require "agama/dbus/bus"
+require "agama/dbus/clients/locale"
 require "agama/dbus/storage"
 require "agama/storage"
+require "agama/ui_locale"
 
 module Agama
   module DBus
@@ -48,6 +50,14 @@ def bus
         Bus.current
       end
 
+      # Starts storage service. It does more then just #export method.
+      def start
+        locale_client = Clients::Locale.new
+        # TODO: test if we need to pass block with additional actions
+        @ui_locale = UILocale.new(locale_client)
+        export
+      end
+
       # Exports the storage proposal object through the D-Bus service
       def export
         dbus_objects.each { |o| service.export(o) }

service/lib/agama/ui_locale.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+# Copyright (c) [2022] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require "yast"
+
+Yast.import "WFM"
+
+module Agama
+  # Object responsible for managing changes of localization produced by dbus backend.
+  class UILocale
+    include Yast::I18n
+    include Yast::Logger
+    # creates new UILocale object that will handle change of UI locale.
+    #
+    # @param [Agama::DBus::Clients::Locale] locale_client to communicate with dbus service
+    # @yield block is callback that is called when ui locale is changed
+    #   to allow user to call methods that needs retranslation
+    def initialize(locale_client, &block)
+      @client = locale_client
+      change_locale(@client.ui_locale)
+      @client.on_ui_locale_change do |locale|
+        change_locale(locale)
+        block.call(locale) if block_given?
+      end
+    end
+
+  private
+
+    def change_locale(locale)
+      # TODO: check if we can use UTF-8 everywhere including strange arch consoles
+      Yast::WFM.SetLanguage(locale, "UTF-8")
+      # explicitelly set ENV to get localization also from libraries like libstorage
+      ENV["LANG"] = locale + ".UTF-8"
+      log.info "set yast language to #{locale}"
+      # explicit call to textdomain to force fast gettext change of language ASAP
+      textdomain "installation"
+    end
+  end
+end