propertiesView: Add button to copy coordiantes

Copy location coordinates in a machine readable format for use in other apps.

Closes #164

Part-of: <https://gitlab.gnome.org/GNOME/loupe/-/merge_requests/371>

src/widgets/properties_view.rs

@@ -20,6 +20,7 @@ use std::cell::{OnceCell, RefCell};
 
 use adw::prelude::*;
 use adw::subclass::prelude::*;
+use glib::translate::IntoGlib;
 use glib::Properties;
 use gtk::CompositeTemplate;
 
@@ -91,6 +92,10 @@ mod imp {
                 obj.imp().open_directory().await;
             });
 
+            klass.install_action("properties.copy-location", None, move |obj, _, _| {
+                obj.imp().copy_location();
+            });
+
             klass.install_action("properties.open-location", None, move |obj, _, _| {
                 obj.imp().open_location();
             });
@@ -280,6 +285,26 @@ mod imp {
             };
         }
 
+        /// Copy GPS location
+        fn copy_location(&self) {
+            let obj = self.obj();
+
+            if let Some(location) = obj.image().and_then(|x| x.metadata().gps_location()) {
+                let clipboard = obj.display().clipboard();
+                clipboard.set_text(&location.machine_readable());
+                let _ = obj.activate_action(
+                    "win.show-toast",
+                    Some(
+                        &(
+                            gettext("Image Coordinates Copied"),
+                            adw::ToastPriority::Normal.into_glib(),
+                        )
+                            .to_variant(),
+                    ),
+                );
+            }
+        }
+
         /// Open GPS location in apps like Maps via `geo:` URI
         fn open_location(&self) {
             let obj = self.obj();