extract pool, scene, track

crates/app/src/model/scene.rs

@@ -0,0 +1,73 @@
+use crate::*;
+
+#[derive(Debug, Default)] pub struct Scene {
+    /// Name of scene
+    pub name:  Arc<str>,
+    /// Clips in scene, one per track
+    pub clips: Vec<Option<Arc<RwLock<MidiClip>>>>,
+    /// Identifying color of scene
+    pub color: ItemTheme,
+}
+
+impl Scene {
+    /// Returns the pulse length of the longest clip in the scene
+    pub fn pulses (&self) -> usize {
+        self.clips.iter().fold(0, |a, p|{
+            a.max(p.as_ref().map(|q|q.read().unwrap().length).unwrap_or(0))
+        })
+    }
+    /// Returns true if all clips in the scene are
+    /// currently playing on the given collection of tracks.
+    pub fn is_playing (&self, tracks: &[Track]) -> bool {
+        self.clips.iter().any(|clip|clip.is_some()) && self.clips.iter().enumerate()
+            .all(|(track_index, clip)|match clip {
+                Some(c) => tracks
+                    .get(track_index)
+                    .map(|track|{
+                        if let Some((_, Some(clip))) = track.player().play_clip() {
+                            *clip.read().unwrap() == *c.read().unwrap()
+                        } else {
+                            false
+                        }
+                    })
+                    .unwrap_or(false),
+                None => true
+            })
+    }
+    pub fn clip (&self, index: usize) -> Option<&Arc<RwLock<MidiClip>>> {
+        match self.clips.get(index) { Some(Some(clip)) => Some(clip), _ => None }
+    }
+}
+
+pub trait HasScenes: HasSelection + HasEditor + Send + Sync {
+    fn scenes (&self) -> &Vec<Scene>;
+    fn scenes_mut (&mut self) -> &mut Vec<Scene>;
+    fn scene_longest (&self) -> usize {
+        self.scenes().iter().map(|s|s.name.len()).fold(0, usize::max)
+    }
+    fn scene (&self) -> Option<&Scene> {
+        self.selected().scene().and_then(|s|self.scenes().get(s))
+    }
+    fn scene_mut (&mut self) -> Option<&mut Scene> {
+        self.selected().scene().and_then(|s|self.scenes_mut().get_mut(s))
+    }
+    fn scene_del (&mut self, index: usize) {
+        self.selected().scene().and_then(|s|Some(self.scenes_mut().remove(index)));
+    }
+    /// Set the color of a scene, returning the previous one.
+    fn scene_set_color (&mut self, index: usize, color: ItemTheme) -> ItemTheme {
+        let scenes = self.scenes_mut();
+        let old = scenes[index].color;
+        scenes[index].color = color;
+        old
+    }
+    /// Generate the default name for a new scene
+    fn scene_default_name (&self) -> Arc<str> {
+        format!("Sc{:3>}", self.scenes().len() + 1).into()
+    }
+}
+
+impl HasScenes for Tek {
+    fn scenes (&self) -> &Vec<Scene> { &self.scenes }
+    fn scenes_mut (&mut self) -> &mut Vec<Scene> { &mut self.scenes }
+}