Use StringTree to store the rendered layout

And print the entire layout at once

src/musicplayer/musicplayer.gleam

@@ -146,7 +146,6 @@ fn update_playback_time_loop(
   interval_ms: Int,
 ) {
   process.sleep(interval_ms)
-  // TODO only update if state is playing
   update_playback_time(mpv, ui)
 
   update_playback_time_loop(mpv, ui, interval_ms)

src/musicplayer/ui/internal.gleam

@@ -7,9 +7,13 @@ pub fn clear_screen() -> Nil {
   io.print("\u{001B}[2J\u{001B}[H")
 }
 
-pub fn print_at(text: String, x: Int, y: Int) -> Nil {
+pub fn chars_at(chars: String, x: Int, y: Int) -> String {
   let seq = "\u{001B}[" <> int.to_string(y) <> ";" <> int.to_string(x) <> "H"
-  io.print(seq <> text)
+  seq <> chars
+}
+
+pub fn print(chars: String) -> Nil {
+  io.print(chars)
 }
 
 pub fn hide_cursor() -> Nil {

src/musicplayer/ui/layout.gleam

@@ -1,10 +1,7 @@
 import gleam/dict
-import gleam/float
-import gleam/int
 import gleam/list
-import gleam/string
+import gleam/string_tree.{type StringTree}
 
-import musicplayer/logging/logging
 import musicplayer/ui/internal
 
 pub type Layout {
@@ -18,14 +15,8 @@ pub type Section {
   PlaybackTime
 }
 
-/// A Nodes width and height is in percentage (of the available width/height of its parent Node)
 pub type Node {
-  Node(
+  Node(content: String, x: Int, y: Int, children: List(Section))
-    content: String,
-    width_percent: Int,
-    height_percent: Int,
-    children: List(Section),
-  )
 }
 
 pub fn new() -> Layout {
@@ -33,26 +24,15 @@ pub fn new() -> Layout {
     dict.from_list([
       #(
         Root,
-        Node(content: "", width_percent: 100, height_percent: 100, children: [
+        Node(content: "", x: 0, y: 0, children: [
-          // Header,
+          Header,
-          // Search,
+          Search,
           PlaybackTime,
         ]),
       ),
-      // #(
+      #(Header, Node(content: "Music Player", x: 1, y: 1, children: [])),
-      //   Header,
+      #(Search, Node(content: "", x: 30, y: 1, children: [])),
-      //   Node(content: "Music Player", width: 50, height: 10, children: []),
+      #(PlaybackTime, Node(content: "00:00", x: 1, y: 2, children: [])),
-      // ),
-      // #(Search, Node(content: "", width: 50, height: 10, children: [])),
-      #(
-        PlaybackTime,
-        Node(
-          content: "00:00",
-          width_percent: 50,
-          height_percent: 100,
-          children: [],
-        ),
-      ),
     ])
 
   Layout(0, 0, nodes: nodes)
@@ -81,100 +61,30 @@ pub fn update_dimensions(layout: Layout, width: Int, height: Int) -> Layout {
   Layout(..layout, width:, height:)
 }
 
-pub fn render(layout: Layout) -> Nil {
+pub fn render(layout: Layout, from: Section) -> Nil {
-  internal.clear_screen()
+  string_tree.new()
-  [layout.width, layout.height]
+  |> render_loop(layout, from, _)
-  |> list.map(int.to_string)
+  |> string_tree.to_string
-  |> string.join(" ")
+  |> internal.print
-  |> string.append("layout - render: ", _)
-  |> logging.log
-
-  let container_width = int.to_float(layout.width)
-  let container_height = int.to_float(layout.height)
-  let container_top_left_x = 1
-  let container_top_left_y = 1
-
-  render_loop(
-    layout,
-    container_width,
-    container_height,
-    container_top_left_x,
-    container_top_left_y,
-    Root,
-  )
 }
 
 pub fn render_loop(
   layout: Layout,
-  container_width: Float,
-  container_height: Float,
-  container_top_left_x: Int,
-  container_top_left_y: Int,
   from: Section,
-) -> Nil {
+  into: StringTree,
-  let margin = 2.0
+) -> StringTree {
-
   case dict.get(layout.nodes, from) {
-    Error(_) -> Nil
+    Error(_) -> into
     Ok(node) -> {
-      list.each(node.children, fn(child) {
+      let parent =
-        let cw =
+        string_tree.append(
-          container_width
+          into,
-          *. { int.to_float(node.width_percent) /. 100.0 }
+          internal.chars_at(node.content, node.x, node.y),
-          -. margin
+        )
-          |> float.floor
 
-        let ch =
+      list.fold(node.children, parent, fn(into_acc, child) {
-          container_height
+        render_loop(layout, child, into_acc)
-          *. { int.to_float(node.height_percent) /. 100.0 }
-          -. margin
-          |> float.floor
-
-        let cx = container_top_left_x + 1
-        let cy = container_top_left_y + 1
-
-        render_loop(layout, cw, ch, cx, cy, child)
       })
-
-      logging.log("section: " <> string.inspect(from))
-      logging.log("container width: " <> float.to_string(container_width))
-      logging.log("container height: " <> float.to_string(container_height))
-
-      let width =
-        container_width *. { int.to_float(node.width_percent) /. 100.0 }
-        |> float.floor
-        |> float.truncate
-
-      let height =
-        container_height *. { int.to_float(node.height_percent) /. 100.0 }
-        |> float.floor
-        |> float.truncate
-
-      logging.log("width: " <> int.to_string(width))
-      logging.log("height: " <> int.to_string(height))
-
-      let cx = container_top_left_x
-      let cy = container_top_left_y
-      logging.log("cx: " <> int.to_string(cx))
-      logging.log("cy: " <> int.to_string(cy))
-
-      draw_box(cx, cy, width, height)
-      // Box heading
-      internal.print_at(node.content, cx, cy)
     }
   }
 }
-
-fn draw_box(x: Int, y: Int, width: Int, height: Int) -> Nil {
-  let box_chars = #("┌", "┐", "└", "┘", "─", "│")
-  let #(tl, tr, bl, br, h, v) = box_chars
-  internal.print_at(tl <> string.repeat(h, width - 2) <> tr, x, y)
-
-  list.range(1, height - 2)
-  |> list.each(fn(row) {
-    internal.print_at(v, x, y + row)
-    internal.print_at(v, x + width - 1, y + row)
-  })
-
-  internal.print_at(bl <> string.repeat(h, width - 2) <> br, x, y + height - 1)
-}

src/musicplayer/ui/ui.gleam

@@ -38,7 +38,7 @@ pub fn new() -> Result(Subject(Control), String) {
         internal.clear_screen()
         internal.hide_cursor()
 
-        redraw_loop(redraw)
+        redraw_on_update_loop(redraw)
       })
 
       Ok(ui)
@@ -63,18 +63,21 @@ fn handle_message(
           |> string.append("ui - updating dimensions: ", _)
           |> logging.log
 
-          let layout = layout.update_dimensions(state.layout, width, height)
+          actor.continue(
-
+            State(
-          process.send(state.redraw, layout)
+              ..state,
-          actor.continue(State(..state, layout:))
+              layout: layout.update_dimensions(state.layout, width, height),
+            ),
+          )
         }
       }
     }
     control.UpdateState(section, content) -> {
       let layout = layout.update_section(state.layout, section, content)
+      let state = State(..state, layout:)
 
       actor.send(state.redraw, layout)
-      actor.continue(State(..state, layout:))
+      actor.continue(state)
     }
 
     control.Exit(reply_to) -> {
@@ -85,11 +88,13 @@ fn handle_message(
   }
 }
 
-fn redraw_loop(redraw: Subject(Layout)) -> Nil {
+fn redraw_on_update_loop(redraw: Subject(Layout)) -> Nil {
-  process.receive_forever(redraw)
+  let layout = process.receive_forever(redraw)
-  |> layout.render
 
-  redraw_loop(redraw)
+  internal.clear_screen()
+  layout.render(layout, layout.Root)
+
+  redraw_on_update_loop(redraw)
 }
 
 fn update_dimensions_on_interval(ui: Subject(Control), interval_ms: Int) {