wip: p.52, e=5, collecting tui by layer p.2

crates/tek_tui/src/tui_select.rs

@@ -0,0 +1,70 @@
+use crate::*;
+
+#[derive(PartialEq, Clone, Copy, Debug)]
+/// Represents the current user selection in the arranger
+pub enum ArrangerSelection {
+    /// The whole mix is selected
+    Mix,
+    /// A track is selected.
+    Track(usize),
+    /// A scene is selected.
+    Scene(usize),
+    /// A clip (track × scene) is selected.
+    Clip(usize, usize),
+}
+
+/// Focus identification methods
+impl ArrangerSelection {
+    pub fn description <E: Engine> (
+        &self,
+        tracks: &Vec<ArrangerTrack>,
+        scenes: &Vec<ArrangerScene>,
+    ) -> String {
+        format!("Selected: {}", match self {
+            Self::Mix => format!("Everything"),
+            Self::Track(t)  => match tracks.get(*t) {
+                Some(track) => format!("T{t}: {}", &track.name.read().unwrap()),
+                None        => format!("T??"),
+            },
+            Self::Scene(s)  => match scenes.get(*s) {
+                Some(scene) => format!("S{s}: {}", &scene.name.read().unwrap()),
+                None        => format!("S??"),
+            },
+            Self::Clip(t, s) => match (tracks.get(*t), scenes.get(*s)) {
+                (Some(_), Some(scene)) => match scene.clip(*t) {
+                    Some(clip) => format!("T{t} S{s} C{}", &clip.read().unwrap().name),
+                    None       => format!("T{t} S{s}: Empty")
+                },
+                _ => format!("T{t} S{s}: Empty"),
+            }
+        })
+    }
+    pub fn is_mix   (&self) -> bool {
+        match self { Self::Mix        => true, _ => false }
+    }
+    pub fn is_track (&self) -> bool {
+        match self { Self::Track(_)   => true, _ => false }
+    }
+    pub fn is_scene (&self) -> bool {
+        match self { Self::Scene(_)   => true, _ => false }
+    }
+    pub fn is_clip  (&self) -> bool {
+        match self { Self::Clip(_, _) => true, _ => false }
+    }
+    pub fn track (&self) -> Option<usize> {
+        use ArrangerSelection::*;
+        match self {
+            Clip(t, _) => Some(*t),
+            Track(t)   => Some(*t),
+            _ => None
+        }
+    }
+    pub fn scene (&self) -> Option<usize> {
+        use ArrangerSelection::*;
+        match self {
+            Clip(_, s) => Some(*s),
+            Scene(s)   => Some(*s),
+            _ => None 
+        }
+    }
+}