exprlib: add GT function (i18n support)

meson.build

@@ -25,6 +25,8 @@ conf_data.set('module_dir',
     get_option('prefix') / get_option('libdir') / 'sfwbar')
 conf_data.set('conf_dir',
     get_option('prefix') / get_option('datadir') / 'sfwbar')
+conf_data.set('locale_dir',
+    get_option('prefix') / get_option('datadir') / 'locale')
 configure_file(input: 'meson.h.meson', output: 'meson.h',
     configuration: conf_data )
 

meson.h.meson

@@ -4,3 +4,4 @@
 #define GTK_LAYER_VER_MICRO @glsh_micro@
 #define MODULE_DIR "@module_dir@"
 #define SYSTEM_CONF_DIR "@conf_dir@"
+#define LOCALE_DIR "@locale_dir@"

src/exprlib.c

@@ -492,6 +492,17 @@ static value_t expr_ident ( vm_t *vm, value_t p[], int np )
   return result;
 }
 
+static value_t action_gettext ( vm_t *vm, value_t p[], gint np )
+{
+  vm_param_check_np_range(vm, np, 1, 2, "GT");
+  vm_param_check_string(vm, p, 0, "GT");
+  if(np==2)
+    vm_param_check_string(vm, p, 1, "GT");
+
+  return value_new_string((gchar *)g_dgettext(
+        np==2? value_get_string(p[1]) : "sfwbar", value_get_string(p[0])));
+}
+
 void expr_lib_init ( void )
 {
   vm_func_init();
@@ -521,4 +532,5 @@ void expr_lib_init ( void )
   vm_func_add("windowinfo", expr_lib_window_info, FALSE);
   vm_func_add("read", expr_lib_read, FALSE);
   vm_func_add("interfaceprovider", expr_iface_provider, FALSE);
+  vm_func_add("gt", action_gettext, FALSE);
 }

src/sfwbar.c

@@ -4,8 +4,10 @@
  */
 
 #include <glib-unix.h>
+#include <glib/gi18n.h>
 #include "sfwbar.h"
 #include "appinfo.h"
+#include "meson.h"
 #include "wayland.h"
 #include "config/config.h"
 #include "ipc/sway.h"
@@ -94,6 +96,9 @@ static void activate (GtkApplication* app, gpointer data )
   GList *clist, *iter;
 
   application = app;
+  bindtextdomain("sfwbar", LOCALE_DIR);
+  bind_textdomain_codeset("sfwbar", "UTF-8");
+  textdomain("sfwbar");
   config_init();
   expr_lib_init();
   action_lib_init();