add command/binding to jump to currently playing track

fixes #181

README.md

@@ -74,6 +74,7 @@ have them configurable.
   * `F3`: Library
     * `d` deletes the currently selected playlist
 * Tracks and playlists can be played using `Return` and queued using `Space`
+* `.` will move to the currently playing track in the queue.
 * `s` will save, `d` will remove the currently selected track to/from your
   library
 * `o` will open a detail view or context menu for the selected item

src/command.rs

@@ -26,6 +26,7 @@ pub enum MoveMode {
     Down,
     Left,
     Right,
+    Playing,
 }
 
 #[derive(Display, Clone, Serialize, Deserialize, Debug)]
@@ -144,8 +145,10 @@ impl fmt::Display for Command {
                     MoveMode::Down => "bottom",
                     MoveMode::Left => "leftmost",
                     MoveMode::Right => "rightmost",
+                    _ => "",
                 }
             ),
+            Command::Move(MoveMode::Playing, _) => "move playing".to_string(),
             Command::Move(mode, MoveAmount::Integer(amount)) => format!("move {} {}", mode, amount),
             Command::Shift(mode, amount) => format!("shift {} {}", mode, amount.unwrap_or(1)),
             Command::Search(term) => format!("search {}", term),
@@ -235,6 +238,7 @@ pub fn parse(input: &str) -> Option<Command> {
                     "bottom" => Some(Command::Move(MoveMode::Down, MoveAmount::Extreme)),
                     "leftmost" => Some(Command::Move(MoveMode::Left, MoveAmount::Extreme)),
                     "rightmost" => Some(Command::Move(MoveMode::Right, MoveAmount::Extreme)),
+                    "playing" => Some(Command::Move(MoveMode::Playing, MoveAmount::default())),
                     _ => None,
                 })
             };

src/commands.rs

@@ -265,6 +265,10 @@ impl CommandManager {
         kb.insert("A".into(), Command::Goto(GotoMode::Artist));
 
         kb.insert("Up".into(), Command::Move(MoveMode::Up, Default::default()));
+        kb.insert(
+            ".".into(),
+            Command::Move(MoveMode::Playing, Default::default()),
+        );
         kb.insert(
             "Down".into(),
             Command::Move(MoveMode::Down, Default::default()),

src/queue.rs

@@ -83,12 +83,16 @@ impl Queue {
     }
 
     pub fn get_current(&self) -> Option<Track> {
-        match *self.current_track.read().unwrap() {
+        match self.get_current_index() {
             Some(index) => Some(self.queue.read().unwrap()[index].clone()),
             None => None,
         }
     }
 
+    pub fn get_current_index(&self) -> Option<usize> {
+        *self.current_track.read().unwrap()
+    }
+
     pub fn append(&self, track: &Track) {
         let mut random_order = self.random_order.write().unwrap();
         if let Some(order) = random_order.as_mut() {

src/ui/queue.rs

@@ -6,7 +6,7 @@ use cursive::Cursive;
 use std::cmp::min;
 use std::sync::Arc;
 
-use crate::command::{Command, ShiftMode};
+use crate::command::{Command, MoveMode, ShiftMode};
 use crate::commands::CommandResult;
 use crate::library::Library;
 use crate::queue::Queue;
@@ -132,6 +132,11 @@ impl ViewExt for QueueView {
                 s.add_layer(dialog);
                 return Ok(CommandResult::Consumed(None));
             }
+            Command::Move(MoveMode::Playing, _) => {
+                if let Some(playing) = self.queue.get_current_index() {
+                    self.list.move_focus_to(playing);
+                }
+            }
             _ => {}
         }