extract clip_auto_create; add clip_auto_remove

crates/app/src/api.rs

@@ -184,34 +184,13 @@ defcom! { |self, app: Tek|
         }
 
         Edit(value: Option<bool>) => {
-            if let Some(value) = value {
+            let editing = app.is_editing();
-                if app.is_editing() != value {
+            let value   = value.unwrap_or_else(||!app.is_editing());
-                    app.editing.store(value, Relaxed);
+            app.editing.store(value, Relaxed);
-                }
+            if value {
+                app.clip_auto_create();
             } else {
-                app.editing.store(!app.is_editing(), Relaxed);
+                app.clip_auto_remove();
-            };
-            // autocreate: create new clip from pool when entering empty cell
-            if let Some(ref pool) = app.pool
-                && app.is_editing()
-                && let Selection::Clip(t, s) = app.selected
-                && let Some(scene) = app.scenes.get_mut(s)
-                && let Some(slot) = scene.clips.get_mut(t)
-                && slot.is_none()
-            {
-                let (index, mut clip) = pool.add_new_clip();
-                // autocolor: new clip colors from scene and track color
-                clip.write().unwrap().color = ItemColor::random_near(
-                    app.tracks[t].color.base.mix(
-                        scene.color.base,
-                        0.5
-                    ),
-                    0.2
-                ).into();
-                if let Some(ref mut editor) = app.editor {
-                    editor.set_clip(Some(&clip));
-                }
-                *slot = Some(clip);
             }
             None
         }

crates/app/src/model.rs

@@ -184,6 +184,44 @@ impl Tek {
         format!("Sc{:3>}", self.scenes().len() + 1).into()
     }
 
+    // Create new clip in pool when entering empty cell
+    pub fn clip_auto_create (&mut self) {
+        if let Some(ref pool) = self.pool
+            && let Selection::Clip(t, s) = self.selected
+            && let Some(scene) = self.scenes.get_mut(s)
+            && let Some(slot) = scene.clips.get_mut(t)
+            && slot.is_none()
+        {
+            let (index, mut clip) = pool.add_new_clip();
+            // autocolor: new clip colors from scene and track color
+            clip.write().unwrap().color = ItemColor::random_near(
+                self.tracks[t].color.base.mix(
+                    scene.color.base,
+                    0.5
+                ),
+                0.2
+            ).into();
+            if let Some(ref mut editor) = self.editor {
+                editor.set_clip(Some(&clip));
+            }
+            *slot = Some(clip);
+        }
+    }
+
+    // Remove clip from arrangement when exiting empty clip editor
+    pub fn clip_auto_remove (&mut self) {
+        if let Some(ref pool) = self.pool
+            && let Selection::Clip(t, s) = self.selected
+            && let Some(scene) = self.scenes.get_mut(s)
+            && let Some(slot) = scene.clips.get_mut(t)
+            && let Some(clip) = slot
+        {
+            if clip.read().unwrap().count_midi_messages() == 0 {
+                *slot = None;
+            }
+        }
+    }
+
 }
 
 has_size!(<TuiOut>|self: Tek|&self.size);

crates/midi/src/clip/clip_model.rs

@@ -61,6 +61,13 @@ impl MidiClip {
             color:       color.unwrap_or_else(ItemPalette::random)
         }
     }
+    pub fn count_midi_messages (&self) -> usize {
+        let mut count = 0;
+        for tick in self.notes.iter() {
+            count += tick.len();
+        }
+        count
+    }
     pub fn set_length (&mut self, length: usize) {
         self.length = length;
         self.notes  = vec![Vec::with_capacity(16);length];