Missed translation of text from *.glade files using gtk::Builder

[emkoder]

Sorry, I'm not very familiar with the GTK, but it seems that there is no support for text translation using gettext and gtk::Builder. I think this method from GTK documentation related to the problem, and it is not implemented yet.
At the moment, I need to manually re-set the text for the elements made in the Glade, wrapping it in gettext call (from gettext-rs crate) in my Rust code. Perhaps there is another way or this feature will appear in future?

[GuillaumeGomez]

@EPashkin: The function isn't in the .gir definition?

[EPashkin]

It present, but not in manual builder.rs

[GuillaumeGomez]

Want to add it or should I? Or maybe do you want to do it @fludardes?

[EPashkin]

@GuillaumeGomez, I currently don't have idea how to test this.
@fludardes, can you check this code? Need add to src/builder.rs of gtk

    pub fn set_translation_domain(&self, domain: Option<&str>) {
        unsafe {
            ffi::gtk_builder_set_translation_domain(self.to_glib_none().0, domain.to_glib_none().0);
        }
    }

    pub fn get_translation_domain(&self) -> Option<String> {
        unsafe {
            from_glib_none(ffi::gtk_builder_get_translation_domain(self.to_glib_none().0))
        }
    }

EDIT: make domain optional

[emkoder]

@EPashkin, Thanks a lot! It works!

[EPashkin]

@fludardes, can you make PR?

[emkoder]

@EPashkin, I'm rather new to git and GitHub, it will take some time. If you agree, I'll try.

[EPashkin]

NP, we can wait
Anyway currently your CI checks (travis and appveyor) in bad state so approving PR can also take some time.

[emkoder]

Done.