Add i18n basic structure

Closes #3.

meson.build

@@ -28,9 +28,11 @@ project('call', 'c',
 
 calls_id = 'sm.puri.Calls'
 calls_homepage = 'https://source.puri.sm/Librem5/calls'
+calls_name = meson.project_name()
 calls_version = meson.project_version()
 
 subdir('libgdbofono')
+subdir('po')
 subdir('src')
 subdir('doc')
 subdir('data')

po/POTFILES.in

@@ -0,0 +1,25 @@
+src/calls-call-data.c
+src/calls-call-display.c
+src/calls-call-holder.c
+src/calls-call-selector-item.c
+src/calls-dummy-call.c
+src/calls-dummy-origin.c
+src/calls-encryption-indicator.c
+src/calls-main-window.c
+src/calls-mm-call.c
+src/calls-mm-origin.c
+src/calls-mm-provider.c
+src/calls-new-call-box.c
+src/calls-ofono-call.c
+src/calls-ofono-object.c
+src/calls-ofono-origin.c
+src/calls-ofono-provider.c
+src/calls-party.c
+src/ui/call-display.ui
+src/ui/call-selector-item.ui
+src/ui/call-window.ui
+src/ui/encryption-indicator.ui
+src/ui/history-header-bar.ui
+src/ui/main-window.ui
+src/ui/new-call-box.ui
+src/ui/new-call-header-bar.ui

po/meson.build

@@ -0,0 +1,2 @@
+i18n = import('i18n')
+i18n.gettext(calls_name, preset : 'glib')

src/main.c

@@ -22,6 +22,7 @@
  *
  */
 
+#include <glib/gi18n.h>
 #include <gtk/gtk.h>
 
 #define HANDY_USE_UNSTABLE_API
@@ -85,6 +86,10 @@ main (int    argc,
   GtkApplication *app;
   int status;
 
+  textdomain (GETTEXT_PACKAGE);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+
   app = gtk_application_new (APP_ID, G_APPLICATION_FLAGS_NONE);
   g_set_prgname (APP_ID);
   g_signal_connect (app, "activate", G_CALLBACK (show_window), NULL);

src/meson.build

@@ -60,8 +60,11 @@ calls_dummy_sources = ['calls-dummy-call.c', 'calls-dummy-call.h',
                        'calls-dummy-provider.c', 'calls-dummy-provider.h',
                       ]
 
+prefix = get_option('prefix')
 config_data = configuration_data()
 config_data.set_quoted('APP_ID', calls_id)
+config_data.set_quoted('GETTEXT_PACKAGE', calls_name)
+config_data.set_quoted('LOCALEDIR', join_paths(prefix, get_option('localedir')))
 config_data.set_quoted('PACKAGE_URL', calls_homepage)
 config_data.set_quoted('PACKAGE_VERSION', calls_version)
 config_data.set_quoted('VCS_TAG', '@VCS_TAG@')