Refactor: Extract command handling for ListView

src/ext_traits.rs

@@ -1,5 +1,7 @@
 use cursive::views::ViewRef;
 
+use crate::command::{Command, MoveAmount, MoveMode};
+use crate::commands::CommandResult;
 use crate::ui::layout::Layout;
 
 pub trait CursiveExt {
@@ -19,3 +21,37 @@ impl CursiveExt for cursive::Cursive {
         cb(self, layout)
     }
 }
+
+pub trait SelectViewExt {
+    /// Translates ncspot commands (i.e. navigating in lists) to Cursive
+    /// `SelectView` actions.
+    fn handle_command(&mut self, cmd: &Command) -> Result<CommandResult, String>;
+}
+
+impl<T: 'static> SelectViewExt for cursive::views::SelectView<T> {
+    fn handle_command(&mut self, cmd: &Command) -> Result<CommandResult, String> {
+        match cmd {
+            Command::Move(mode, amount) => {
+                let items = self.len();
+                match mode {
+                    MoveMode::Up => {
+                        match amount {
+                            MoveAmount::Extreme => self.set_selection(0),
+                            MoveAmount::Integer(amount) => self.select_up(*amount as usize),
+                        };
+                        Ok(CommandResult::Consumed(None))
+                    }
+                    MoveMode::Down => {
+                        match amount {
+                            MoveAmount::Extreme => self.set_selection(items),
+                            MoveAmount::Integer(amount) => self.select_down(*amount as usize),
+                        };
+                        Ok(CommandResult::Consumed(None))
+                    }
+                    _ => Ok(CommandResult::Consumed(None)),
+                }
+            }
+            _ => Ok(CommandResult::Ignored),
+        }
+    }
+}

src/ui/contextmenu.rs

@@ -6,6 +6,7 @@ use cursive::views::{Dialog, NamedView, ScrollView, SelectView};
 use cursive::Cursive;
 
 use crate::commands::CommandResult;
+use crate::ext_traits::SelectViewExt;
 use crate::library::Library;
 use crate::model::artist::Artist;
 use crate::model::playable::Playable;
@@ -386,26 +387,9 @@ fn handle_move_command<T: 'static>(
             s.pop_layer();
             Ok(CommandResult::Consumed(None))
         }
-        Command::Move(mode, amount) => sel
+        Command::Move(_, _) => sel
             .call_on_name(name, |select: &mut SelectView<T>| {
-                let items = select.len();
-                match mode {
-                    MoveMode::Up => {
-                        match amount {
-                            MoveAmount::Extreme => select.set_selection(0),
-                            MoveAmount::Integer(amount) => select.select_up(*amount as usize),
-                        };
-                        Ok(CommandResult::Consumed(None))
-                    }
-                    MoveMode::Down => {
-                        match amount {
-                            MoveAmount::Extreme => select.set_selection(items),
-                            MoveAmount::Integer(amount) => select.select_down(*amount as usize),
-                        };
-                        Ok(CommandResult::Consumed(None))
-                    }
-                    _ => Ok(CommandResult::Consumed(None)),
-                }
+                select.handle_command(cmd)
             })
             .unwrap_or(Ok(CommandResult::Consumed(None))),
         _ => Ok(CommandResult::Consumed(None)),