Implement scroll up/down

tori/src/component/visualizer.rs

@@ -66,6 +66,7 @@ impl Default for ThreadHandle {
     }
 }
 
+// TODO: use tokio::process
 pub struct Visualizer {
     pub state: Option<VisualizerState>,
     pub width: usize,

tori/src/events/action.rs

@@ -6,6 +6,8 @@ pub enum Action {
     Rerender,
     Tick,
     Input(KeyEvent),
+    ScrollDown,
+    ScrollUp,
     Command(Command),
     SongAdded { playlist: String, song: String },
     RefreshSongs,

tori/src/update/mod.rs

@@ -9,7 +9,7 @@ use crate::{
     state::{browse_screen::Focus, Screen, State},
     util::copy_to_clipboard,
 };
-use crossterm::event::{Event as TermEvent, KeyCode, KeyEvent, KeyEventKind};
+use crossterm::event::{Event as TermEvent, KeyCode, KeyEvent, KeyEventKind, MouseEventKind};
 
 pub fn handle_event(state: &mut State<'_>, ev: TermEvent) -> Result<Option<Action>> {
     Ok(match ev {
@@ -19,6 +19,16 @@ pub fn handle_event(state: &mut State<'_>, ev: TermEvent) -> Result<Option<Actio
                 Focus::PlaylistsFilter(_) | Focus::SongsFilter(_) => Some(Action::Input(key)),
             },
         },
+        TermEvent::Mouse(mouse) => match mouse.kind {
+            MouseEventKind::Down(_) => todo!("Clicks are yet to be implemented!"),
+            MouseEventKind::Up(_) => todo!("Clickups are yet to be implemented!"),
+            MouseEventKind::Drag(_) => todo!("Dragging is yet to be implemented!"),
+            MouseEventKind::ScrollDown => Some(Action::ScrollDown),
+            MouseEventKind::ScrollUp => Some(Action::ScrollUp),
+            MouseEventKind::Moved | MouseEventKind::ScrollLeft | MouseEventKind::ScrollRight => {
+                None
+            }
+        },
         _ => None,
     })
 }
@@ -59,6 +69,21 @@ pub fn update(state: &mut State<'_>, tx: Tx, act: Action) -> Result<Option<Actio
             },
         },
 
+        ScrollDown => match &mut state.screen {
+            Screen::BrowseScreen(screen) => match &screen.focus {
+                Focus::Playlists => screen.shown_playlists.select_next(),
+                Focus::Songs => screen.shown_songs.select_next(),
+                Focus::PlaylistsFilter(_) | Focus::SongsFilter(_) => {}
+            },
+        },
+        ScrollUp => match &mut state.screen {
+            Screen::BrowseScreen(screen) => match &screen.focus {
+                Focus::Playlists => screen.shown_playlists.select_prev(),
+                Focus::Songs => screen.shown_songs.select_prev(),
+                Focus::PlaylistsFilter(_) | Focus::SongsFilter(_) => {}
+            },
+        },
+
         Tick => {
             state.now_playing.update(&state.player);
             state.visualizer.update()?;