Tutorials: Improve logic for loading localized versions

There's no need to translate every filename, just translate the
language code.

Also use Inkscape::IO::Resource::get_filename to ensure we fall-back
to Englishstutorials should the localized versions not be available.

1 files changed, 14 insertions, 6 deletions

diff --git a/src/help.cpp b/src/help.cpp
index 3c76797c0..fd935e8c2 100644
--- a/src/help.cpp
+++ b/src/help.cpp
@@ -17,28 +17,36 @@
 
 #include "file.h"
 #include "help.h"
+#include "io/resource.h"
 #include "io/sys.h"
 #include "path-prefix.h"
 #include "ui/dialog/aboutbox.h"
 #include "ui/interface.h"
 
+
+using namespace Inkscape::IO::Resource;
+
+
 void sp_help_about()
 {
     Inkscape::UI::Dialog::AboutBox::show_about();
 }
 
-void sp_help_open_tutorial(GtkMenuItem *, void* data)
+void sp_help_open_tutorial(Glib::ustring name)
 {
-    gchar const *name = static_cast<gchar const *>(data);
-    gchar *c = g_build_filename(INKSCAPE_TUTORIALSDIR, name, NULL);
-    if (Inkscape::IO::file_test(c, G_FILE_TEST_EXISTS)) {
-        sp_file_open(c, nullptr, false, false);
+    Glib::ustring filename = name + ".svg";
+    // TRANSLATORS: 'en' is a ISO 639-1 language code.
+    // Replace with language code for your language (i.e. the name of your .po file)
+    Glib::ustring filename_localized = name + "." + _("en") + ".svg";
+    
+    filename = get_filename(TUTORIALS, filename.c_str(), filename_localized.c_str());
+    if (!filename.empty()) {
+        sp_file_open(filename.c_str(), nullptr, false, false);
     } else {
         sp_ui_error_dialog(_("The tutorial files are not installed.\nFor Linux, you may need to install "
                              "'inkscape-tutorials'; for Windows, please re-run the setup and select 'Tutorials'.\nThe "
                              "tutorials can also be found online at https://inkscape.org/learn/tutorials/"));
     }
-    g_free(c);
 }
 
 /*