feat: finish default icon and friendly app name for application subkey

wfassoc/src/lowlevel.rs

@@ -697,7 +697,21 @@ impl ApplicationsKey {
     const NAMEOF_DEFAULT_ICON_PART2: &str = "";
 
     pub fn get_default_icon(&self, view: View) -> Result<Option<IconResVariant>, Error> {
-        todo!()
+        let key = self.open_view_for_getter(view)?;
+        // Get default icon subkey
+        let default_icon_key = match regext::try_open_subkey_with_flags(
+            &key,
+            Self::NAMEOF_DEFAULT_ICON_PART1,
+            KEY_READ,
+        )? {
+            Some(key) => key,
+            None => return Ok(None),
+        };
+        // Get the default value of default icon subkey
+        let default_icon_default_value =
+            regext::try_get_value::<String, _>(&default_icon_key, Self::NAMEOF_DEFAULT_ICON_PART2)?;
+        // Transform it as result
+        Ok(default_icon_default_value.map(|v| IconResVariant::from(v.as_str())))
     }
 
     pub fn set_default_icon(
@@ -705,13 +719,35 @@ impl ApplicationsKey {
         scope: Scope,
         icon: Option<&IconResVariant>,
     ) -> Result<(), Error> {
-        todo!()
+        let key = self.open_scope_for_setter(scope)?;
+
+        match icon {
+            Some(icon) => {
+                // Create default icon subkey
+                let (default_icon_key, _) = key.create_subkey_with_flags(
+                    Self::NAMEOF_DEFAULT_ICON_PART1,
+                    KEY_READ | KEY_WRITE,
+                )?;
+                // Set default value of default icon subkey.
+                default_icon_key.set_value(Self::NAMEOF_DEFAULT_ICON_PART2, &icon.to_string())?;
+            }
+            None => {
+                // Delete shell and its all subkey.
+                key.delete_subkey_all(regext::blank_path_guard(Self::NAMEOF_DEFAULT_ICON_PART1)?)?;
+            }
+        }
+
+        Ok(())
     }
 
     const NAMEOF_FRIENDLY_APP_NAME: &str = "FriendlyAppName";
 
     pub fn get_friendly_app_name(&self, view: View) -> Result<Option<StrResVariant>, Error> {
-        todo!()
+        let key = self.open_view_for_getter(view)?;
+        // Get value of it
+        let value = regext::try_get_value::<String, _>(&key, Self::NAMEOF_FRIENDLY_APP_NAME)?;
+        // Transform it as result
+        Ok(value.map(|v| StrResVariant::from(v.as_str())))
     }
 
     pub fn set_friendly_app_name(
@@ -719,7 +755,20 @@ impl ApplicationsKey {
         scope: Scope,
         name: Option<&StrResVariant>,
     ) -> Result<(), Error> {
-        todo!()
+        let key = self.open_scope_for_setter(scope)?;
+
+        match name {
+            Some(name) => {
+                // Set value for this key
+                key.set_value(Self::NAMEOF_FRIENDLY_APP_NAME, &name.to_string())?;
+            }
+            None => {
+                // Delete this key
+                key.delete_value(Self::NAMEOF_FRIENDLY_APP_NAME)?;
+            }
+        }
+
+        Ok(())
     }
 
     const NAMEOF_SUPPORTED_TYPES: &str = "SupportedTypes";