i18n: add basic support for translations

Handle translations of GUI elements defined in .ui files.
See README.md for details.

Fixes QubesOS/qubes-issues#2599

Makefile

@@ -30,6 +30,12 @@ res:
 	pyuic4 -o qubesmanager/ui_about.py about.ui
 	pyuic4 -o qubesmanager/ui_releasenotes.py releasenotes.ui
 
+translations:
+	lrelease-qt4 qubesmanager.pro
+
+update_ts: res
+	pylupdate4 qubesmanager.pro
+
 update-repo-current:
 	ln -f $(RPMS_DIR)/x86_64/qubes-manager-*$(VERSION)*.rpm ../yum/current-release/current/dom0/rpm/
 

README.md

@@ -0,0 +1,21 @@
+Qubes Manager
+==============
+
+Managing translations
+----------------------
+
+### Adding new language
+
+1. Add `i18n/qubesmanager_LANGUAGECODE.ts` (replace `LANGUAGECODE` with actual code,
+   for example `es`) to `qubesmanager.pro` - `TRANSLATIONS` setting.
+2. Run `make res update_ts`
+
+### Regenerating translation source files (`.ts`)
+
+    make res update_ts
+
+This will keep translated strings, but will add new ones.
+
+### Updating translations
+
+Commit updated `.ts` files into `i18n` directory.

i18n/.gitignore

@@ -0,0 +1 @@
+*.qm

qubesmanager.pro

@@ -0,0 +1,47 @@
+SOURCES = \
+          about.ui \
+          backupdlg.ui \
+          globalsettingsdlg.ui \
+          logdlg.ui \
+          mainwindow.ui \
+          multiselectwidget.ui \
+          newappvmdlg.ui \
+          newfwruledlg.ui \
+          releasenotes.ui \
+          restoredlg.ui \
+          settingsdlg.ui \
+          qubesmanager/about.py \
+          qubesmanager/appmenu_select.py \
+          qubesmanager/backup.py \
+          qubesmanager/backup_utils.py \
+          qubesmanager/block.py \
+          qubesmanager/clipboard.py \
+          qubesmanager/create_new_vm.py \
+          qubesmanager/firewall.py \
+          qubesmanager/global_settings.py \
+          qubesmanager/log_dialog.py \
+          qubesmanager/main.py \
+          qubesmanager/multiselectwidget.py \
+          qubesmanager/releasenotes.py \
+          qubesmanager/resources_rc.py \
+          qubesmanager/restore.py \
+          qubesmanager/settings.py \
+          qubesmanager/table_widgets.py \
+          qubesmanager/thread_monitor.py \
+          qubesmanager/ui_about.py \
+          qubesmanager/ui_backupdlg.py \
+          qubesmanager/ui_globalsettingsdlg.py \
+          qubesmanager/ui_logdlg.py \
+          qubesmanager/ui_mainwindow.py \
+          qubesmanager/ui_multiselectwidget.py \
+          qubesmanager/ui_newappvmdlg.py \
+          qubesmanager/ui_newfwruledlg.py \
+          qubesmanager/ui_releasenotes.py \
+          qubesmanager/ui_restoredlg.py \
+          qubesmanager/ui_settingsdlg.py
+
+TRANSLATIONS = 
+
+
+CODECFORTR = UTF-8
+CODECFORSRC = UTF-8

qubesmanager/main.py

@@ -2114,6 +2114,14 @@ def main():
     app.setWindowIcon(QIcon.fromTheme("qubes-manager"))
     app.setAttribute(Qt.AA_DontShowIconsInMenus, False)
 
+    qt_translator = QTranslator()
+    locale = QLocale.system().name()
+    i18n_dir = os.path.join(
+        os.path.dirname(os.path.realpath(__file__)),
+        'i18n')
+    qt_translator.load("qubesmanager_{!s}.qm".format(locale), i18n_dir)
+    app.installTranslator(qt_translator)
+
     sys.excepthook = handle_exception
 
     global session_bus

rpm_spec/qmgr.spec

@@ -24,7 +24,7 @@ AutoReq:	0
 The Graphical Qubes VM Manager.
 
 %build
-make res
+make res translations
 python -m compileall qubesmanager
 python -O -m compileall qubesmanager
 
@@ -68,6 +68,9 @@ cp qubesmanager/ui_logdlg.py{,c,o} $RPM_BUILD_ROOT%{python_sitearch}/qubesmanage
 cp qubesmanager/ui_about.py{,c,o} $RPM_BUILD_ROOT%{python_sitearch}/qubesmanager
 cp qubesmanager/ui_releasenotes.py{,c,o} $RPM_BUILD_ROOT%{python_sitearch}/qubesmanager
 
+mkdir -p $RPM_BUILD_ROOT%{python_sitearch}/qubesmanager/i18n
+cp i18n/qubesmanager_*.qm $RPM_BUILD_ROOT%{python_sitearch}/qubesmanager/i18n/
+
 mkdir -p $RPM_BUILD_ROOT/usr/share/applications
 cp qubes-manager.desktop $RPM_BUILD_ROOT/usr/share/applications
 mkdir -p $RPM_BUILD_ROOT/etc/xdg/autostart/
@@ -182,6 +185,7 @@ rm -rf $RPM_BUILD_ROOT
 %{python_sitearch}/qubesmanager/ui_releasenotes.py
 %{python_sitearch}/qubesmanager/ui_releasenotes.pyc
 %{python_sitearch}/qubesmanager/ui_releasenotes.pyo
+%{python_sitearch}/qubesmanager/i18n/qubesmanager_*.qm
 
 
 /usr/share/applications/qubes-manager.desktop