More streamlining

src/tui/app/machine/search.rs

@@ -109,14 +109,14 @@ impl<MH: IMusicHoard> IAppInteractSearch for AppMachine<MH, AppSearch> {
 
 trait IAppInteractSearchPrivate {
     fn incremental_search(&mut self, next: bool);
-    fn search_category<T, P>(
-        state: SelectionState<'_, T>,
-        search_name: &str,
-        next: bool,
-        predicate: P,
-    ) -> Option<usize>
+    fn next<P, T>(pred: P, name: &str, next: bool, st: SelectionState<'_, T>) -> Option<usize>
     where
         P: FnMut(bool, bool, &str, &T) -> bool;
+
+    fn search_artists(name: &str, next: bool, st: SelectionState<'_, Artist>) -> Option<usize>;
+    fn search_albums(name: &str, next: bool, st: SelectionState<'_, Album>) -> Option<usize>;
+    fn search_tracks(name: &str, next: bool, st: SelectionState<'_, Track>) -> Option<usize>;
+
     fn predicate_artists(case_sens: bool, char_sens: bool, search: &str, probe: &Artist) -> bool;
     fn predicate_albums(case_sens: bool, char_sens: bool, search: &str, probe: &Album) -> bool;
     fn predicate_tracks(case_sens: bool, char_sens: bool, search: &str, probe: &Track) -> bool;
@@ -132,46 +132,54 @@ impl<MH: IMusicHoard> IAppInteractSearchPrivate for AppMachine<MH, AppSearch> {
         let collection = self.inner.music_hoard.get_collection();
         let search = &self.state.string;
 
-        let sel = &mut self.inner.selection;
+        let sel = &self.inner.selection;
         let result = match sel.active {
-            Category::Artist => sel.state_artist(collection).and_then(|state| {
-                Self::search_category(state, search, next, Self::predicate_artists)
-            }),
-            Category::Album => sel.state_album(collection).and_then(|state| {
-                Self::search_category(state, search, next, Self::predicate_albums)
-            }),
-            Category::Track => sel.state_track(collection).and_then(|state| {
-                Self::search_category(state, search, next, Self::predicate_tracks)
-            }),
+            Category::Artist => sel
+                .state_artist(collection)
+                .and_then(|state| Self::search_artists(search, next, state)),
+            Category::Album => sel
+                .state_album(collection)
+                .and_then(|state| Self::search_albums(search, next, state)),
+            Category::Track => sel
+                .state_track(collection)
+                .and_then(|state| Self::search_tracks(search, next, state)),
         };
 
         if result.is_some() {
-            sel.select(collection, result);
+            let collection = self.inner.music_hoard.get_collection();
+            self.inner.selection.select(collection, result);
         }
     }
 
-    fn search_category<T, P>(
-        state: SelectionState<'_, T>,
-        search_name: &str,
-        next: bool,
-        mut predicate: P,
-    ) -> Option<usize>
+    fn search_artists(name: &str, next: bool, st: SelectionState<'_, Artist>) -> Option<usize> {
+        Self::next(Self::predicate_artists, name, next, st)
+    }
+
+    fn search_albums(name: &str, next: bool, st: SelectionState<'_, Album>) -> Option<usize> {
+        Self::next(Self::predicate_albums, name, next, st)
+    }
+
+    fn search_tracks(name: &str, next: bool, st: SelectionState<'_, Track>) -> Option<usize> {
+        Self::next(Self::predicate_tracks, name, next, st)
+    }
+
+    fn next<P, T>(mut pred: P, name: &str, next: bool, st: SelectionState<'_, T>) -> Option<usize>
     where
         P: FnMut(bool, bool, &str, &T) -> bool,
     {
-        let case_sens = Self::is_case_sensitive(search_name);
-        let char_sens = Self::is_char_sensitive(search_name);
-        let search = Self::normalize_search(search_name, !case_sens, !char_sens);
+        let case_sens = Self::is_case_sensitive(name);
+        let char_sens = Self::is_char_sensitive(name);
+        let search = Self::normalize_search(name, !case_sens, !char_sens);
 
-        let mut index = state.index;
-        if next && ((index + 1) < state.list.len()) {
+        let mut index = st.index;
+        if next && ((index + 1) < st.list.len()) {
             index += 1;
         }
 
-        let slice = &state.list[index..];
+        let slice = &st.list[index..];
         slice
             .iter()
-            .position(|probe| predicate(case_sens, char_sens, &search, probe))
+            .position(|probe| pred(case_sens, char_sens, &search, probe))
             .map(|slice_index| index + slice_index)
     }