rewrite vertical arranger as components

crates/tek_sequencer/src/arranger.rs

@@ -498,103 +498,77 @@ impl<'a> Widget for CursorFocus<'a> {
 
 struct TracksHeader<'a>(u16, &'a[(usize, usize)], &'a [Sequencer<Tui>]);
 
-impl<'a> Widget for TracksHeader<'a> {
+impl<'a> Content for TracksHeader<'a> {
     type Engine = Tui;
-    fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
-        let area = to.area();
-        let Self(offset, track_cols, tracks) = *self;
-        let [x, y, width, _] = area;
-        for (track, (w, x)) in tracks.iter().zip(track_cols) {
-            let x = *x as u16;
-            if x > width {
-                break
+    fn content (&self) -> impl Widget<Engine = Tui> {
+        let Self(_offset, columns, tracks) = *self;
+        Split::right(move |add|{
+            for (track, (w, _)) in tracks.iter().zip(columns) {
+                add(&Min::W(*w as u16, Layers::new(|add|{
+                    add(&FillBg(COLOR_BG1))?;
+                    add(&track.name.read().unwrap().as_str())
+                })))?;
             }
-            let name = track.name.read().unwrap();
-            to.fill_bg([offset + x, y, *w as u16, 2], COLOR_BG1);
-            to.blit(&*name, offset + x + 1, y, Some(Style::default().white()))?;
-        }
-        Ok(Some([x, y, width, 2]))
+            Ok(())
+        })
     }
 }
 
 struct SceneRows<'a>(u16, &'a[(usize, usize)], &'a[(usize, usize)], &'a[Sequencer<Tui>], &'a[Scene]);
 
-impl<'a> Widget for SceneRows<'a> {
+impl<'a> Content for SceneRows<'a> {
     type Engine = Tui;
-    fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
-        let area = to.area();
-        let Self(offset, track_cols, scene_rows, tracks, scenes) = *self;
-        let black = Some(Style::default().fg(Nord::SEPARATOR));
-        let [_, mut y, _, _height] = area;
-        for (_, x) in track_cols.iter() {
-            let x = *x as u16;
-            if x > 0 {
-                for y in area.y()-2..y-2 {
-                    to.blit(&"▎", x - 1, y, black)?;
-                }
+    fn content (&self) -> impl Widget<Engine = Tui> {
+        let Self(offset, columns, rows, tracks, scenes) = *self;
+        Split::down(move |add| {
+            for (scene, (_pulses, _)) in scenes.iter().zip(rows) {
+                add(&SceneRow(tracks, scene, columns, offset))?;
             }
-        }
-        for (scene, (pulses, _)) in scenes.iter().zip(scene_rows) {
-            //if y > height {
-                //break
-            //}
-            let h = 1.max((pulses / 96) as u16);
-            SceneRow(tracks, scene, track_cols, offset)
-                .render(to.with_area(area.x(), y, area.w(), h))?;
-            y = y + h
-        }
-        Ok(Some(area))
+            Ok(())
+        })
     }
 }
 
 struct SceneRow<'a>(&'a[Sequencer<Tui>], &'a Scene, &'a[(usize, usize)], u16);
 
-impl<'a> Widget for SceneRow<'a> {
+impl<'a> Content for SceneRow<'a> {
     type Engine = Tui;
-    fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
-        let area = to.area();
-        let Self(tracks, scene, track_cols, offset) = self;
-        let [x, y, width, _] = area;
+    fn content (&self) -> impl Widget<Engine = Tui> {
+        let Self(tracks, scene, columns, _offset) = self;
         let playing = scene.is_playing(tracks);
-        to.blit(&if playing { "▶" } else { " " }, x, y, None)?;
-        to.blit(&*scene.name.read().unwrap(), x + 1, y, Some(Style::default().white()))?;
-        to.fill_bg([x, y, offset.saturating_sub(1), area.h()], COLOR_BG1);
-        for (track, (w, x)) in track_cols.iter().enumerate() {
-            let x = *x as u16 + offset;
-            if x > width {
-                break
+        Split::right(move |add| {
+            add(&Layers::new(|add|{
+                add(&if playing { "▶" } else { " " })?;
+                add(&scene.name.read().unwrap().as_str())?;
+                add(&FillBg(COLOR_BG1))
+            }))?;
+            for (track, (_w, _x)) in columns.iter().enumerate() {
+                add(&SceneClip(tracks.get(track), scene.clips.get(track)))?;
             }
-            if let (Some(track), Some(Some(clip))) = (
-                tracks.get(track), scene.clips.get(track)
-            ) {
-                SceneClip(track, *clip).render(to.with_area(x, y, *w as u16, area.h()))?;
-            }
-        }
-        Ok(Some(area))
+            Ok(())
+        })
     }
 }
 
-struct SceneClip<'a>(&'a Sequencer<Tui>, usize);
+struct SceneClip<'a>(Option<&'a Sequencer<Tui>>, Option<&'a Option<usize>>);
 
-impl<'a> Widget for SceneClip<'a> {
+impl<'a> Content for SceneClip<'a> {
     type Engine = Tui;
-    fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
-        let area = to.area();
+    fn content (&self) -> impl Widget<Engine = Tui> {
         let Self(track, clip) = self;
-        let style = Some(Style::default().white());
-        if let Some(phrase) = track.phrases.get(*clip) {
-            let phrase = phrase.read().unwrap();
-            let name = phrase.name.read().unwrap();
-            to.blit(&format!("{clip:02} {name}"), area.x() + 1, area.y(), style)?;
-            to.fill_bg(area, if track.sequence == Some(*clip) {
-                Nord::PLAYING
-            } else {
-                COLOR_BG1
-            });
-        } else {
-            to.fill_bg(area, COLOR_BG0)
-        }
-        Ok(Some(area))
+        Layers::new(move |add|{
+            let mut color = COLOR_BG0;
+            if let (Some(track), Some(Some(clip))) = (track, clip) {
+                if let Some(phrase) = track.phrases.get(*clip) {
+                    add(&format!(
+                        "{clip:02} {}",
+                        phrase.read().unwrap().name.read().unwrap()
+                    ).as_str())?;
+                    color = if track.sequence == Some(*clip) { Nord::PLAYING } else { COLOR_BG1 };
+                }
+            }
+            add(&FillBg(color))
+        })
     }
 }
 
@@ -867,6 +841,7 @@ impl<'a> Widget for TrackScenesColumn<'a> {
         Ok(Some([x, y, x2, height]))
     }
 }
+
 /// Appears on first run (i.e. if state dir is missing).
 pub struct ArrangerRenameModal<E: Engine> {
     _engine: std::marker::PhantomData<E>,
@@ -876,6 +851,7 @@ pub struct ArrangerRenameModal<E: Engine> {
     result: Arc<RwLock<String>>,
     cursor: usize
 }
+
 impl<E: Engine> ArrangerRenameModal<E> {
     pub fn new (target: ArrangerFocus, value: &Arc<RwLock<String>>) -> Self {
         Self {
@@ -888,6 +864,7 @@ impl<E: Engine> ArrangerRenameModal<E> {
         }
     }
 }
+
 impl Widget for ArrangerRenameModal<Tui> {
     type Engine = Tui;
     fn layout (&self, area: [u16;4]) -> Perhaps<[u16;4]> {
@@ -914,6 +891,7 @@ impl Widget for ArrangerRenameModal<Tui> {
         Ok(Some(area))
     }
 }
+
 impl Handle<Tui> for ArrangerRenameModal<Tui> {
     fn handle (&mut self, from: &Tui) -> Perhaps<bool> {
         match from.event() {
@@ -952,6 +930,7 @@ impl Handle<Tui> for ArrangerRenameModal<Tui> {
         }
     }
 }
+
 impl<E: Engine + Send> Exit for ArrangerRenameModal<E> {
     fn exited (&self) -> bool {
         self.done