use-string-trees

src/musicplayer/musicplayer.gleam

@@ -146,6 +146,7 @@ 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

@@ -1,6 +1,11 @@
 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 {
@@ -8,33 +13,109 @@ pub type Layout {
 }
 
 pub type Section {
+  Section(String)
+
   Root
   Header
   Search
   PlaybackTime
 }
 
+// pub type Section {
+//   Root
+//   Header
+//   Search
+//   PlaybackTime
+//   Test
+
+//   Row1
+//   A
+//   B
+
+//   Row2
+//   C
+//   D
+// }
+
+pub type NodeType {
+  Container
+  Row
+  Cell
+}
+
+/// A Nodes width and height is in percentage (of the available width/height of its parent Node)
 pub type Node {
-  Node(content: String, x: Int, y: Int, children: List(Section))
+  Node(
+    t: NodeType,
+    content: String,
+    width_percent: Int,
+    height_percent: Int,
+    children: List(Section),
+  )
 }
 
 pub fn new() -> Layout {
   let nodes =
     dict.from_list([
       #(
-        Root,
+        Section("Root"),
-        Node(content: "", x: 0, y: 0, children: [
+        Node(
-          Header,
+          t: Container,
-          Search,
+          content: "container",
-          PlaybackTime,
+          width_percent: 100,
-        ]),
+          height_percent: 100,
+          children: [
+            Section("Row1"),
+            Section("Row2"),
+          ],
+        ),
+      ),
+      #(
+        Section("Row1"),
+        Node(
+          t: Row,
+          content: "row 1",
+          width_percent: 100,
+          height_percent: 50,
+          children: [
+            Section("A"),
+            Section("A"),
+          ],
+        ),
+      ),
+      #(
+        Section("A"),
+        Node(
+          t: Cell,
+          content: "cell 1",
+          width_percent: 50,
+          height_percent: 100,
+          children: [],
+        ),
+      ),
+      #(
+        Section("B"),
+        Node(
+          t: Cell,
+          content: "cell 2",
+          width_percent: 50,
+          height_percent: 100,
+          children: [],
+        ),
+      ),
+      #(
+        Section("Row2"),
+        Node(
+          t: Row,
+          content: "row 1",
+          width_percent: 100,
+          height_percent: 50,
+          children: [],
+        ),
       ),
-      #(Header, Node(content: "Music Player", x: 1, y: 1, children: [])),
-      #(Search, Node(content: "", x: 30, y: 1, children: [])),
-      #(PlaybackTime, Node(content: "00:00", x: 1, y: 2, children: [])),
     ])
 
-  Layout(0, 0, nodes: nodes)
+  Layout(width: 0, height: 0, nodes: nodes)
 }
 
 pub fn update_section(
@@ -60,13 +141,139 @@ pub fn update_dimensions(layout: Layout, width: Int, height: Int) -> Layout {
   Layout(..layout, width:, height:)
 }
 
-pub fn render(layout: Layout, from: Section) -> Nil {
+pub fn render(layout: Layout) -> Nil {
-  case dict.get(layout.nodes, from) {
+  internal.clear_screen()
-    Error(_) -> Nil
+  [layout.width, layout.height]
-    Ok(node) -> {
+  |> list.map(int.to_string)
-      list.each(node.children, fn(child) { render(layout, child) })
+  |> string.join(" ")
+  |> string.append("layout - render: ", _)
+  |> logging.log
 
-      internal.print_at(node.content, node.x, node.y)
+  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
+
+  string_tree.new()
+  |> render_loop(
+    layout,
+    container_width,
+    container_height,
+    container_top_left_x,
+    container_top_left_y,
+    0,
+    Section("Root"),
+    _,
+  )
+  |> string_tree.to_string
+  |> internal.print
+}
+
+pub fn render_loop(
+  layout: Layout,
+  container_width: Float,
+  container_height: Float,
+  container_top_left_x: Int,
+  container_top_left_y: Int,
+  index: Int,
+  from: Section,
+  tree: StringTree,
+) -> StringTree {
+  let margin = 2.0
+
+  case dict.get(layout.nodes, from) {
+    Error(_) -> tree
+    Ok(node) -> {
+      let final_tree =
+        list.index_map(node.children, fn(child, i) { #(i, child) })
+        |> list.fold(tree, fn(updated_tree: StringTree, ic: #(Int, Section)) {
+          let #(i, child) = ic
+
+          let cw =
+            container_width
+            *. { int.to_float(node.width_percent) /. 100.0 }
+            -. margin
+            |> float.floor
+
+          let ch =
+            container_height
+            *. { 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, i, child, updated_tree)
+        })
+
+      logging.log("section: " <> string.inspect(from))
+      logging.log("section type: " <> string.inspect(node.t))
+      logging.log("index: " <> string.inspect(index))
+      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("section width: " <> int.to_string(width))
+      logging.log("section height: " <> int.to_string(height))
+
+      let #(cx, cy) = case node.t {
+        Container -> #(container_top_left_x, container_top_left_y)
+        Row -> #(
+          container_top_left_x,
+          container_top_left_y + { index * height },
+        )
+        Cell -> #(
+          container_top_left_x + { index * width },
+          container_top_left_y,
+        )
+      }
+
+      logging.log("cx: " <> int.to_string(cx))
+      logging.log("cy: " <> int.to_string(cy))
+
+      final_tree
+      |> string_tree.append(draw_box(cx, cy, width, height))
+      // Box heading
+      |> string_tree.append(internal.chars_at(node.content, cx, cy))
     }
   }
 }
+
+fn draw_box(x: Int, y: Int, width: Int, height: Int) -> String {
+  let box_tree = string_tree.new()
+  let box_chars = #("┌", "┐", "└", "┘", "─", "│")
+  let #(tl, tr, bl, br, h, v) = box_chars
+
+  let box_tree =
+    string_tree.append(
+      box_tree,
+      internal.chars_at(tl <> string.repeat(h, width - 2) <> tr, x, y),
+    )
+
+  let box_trees =
+    list.range(1, height - 2)
+    |> list.map(fn(row) {
+      box_tree
+      |> string_tree.append(internal.chars_at(v, x, y + row))
+      |> string_tree.append(internal.chars_at(v, x + width - 1, y + row))
+    })
+
+  string_tree.append(
+    string_tree.concat(box_trees),
+    internal.chars_at(
+      bl <> string.repeat(h, width - 2) <> br,
+      x,
+      y + height - 1,
+    ),
+  )
+  |> string_tree.to_string
+}

src/musicplayer/ui/ui.gleam

@@ -3,6 +3,7 @@ import gleam/int
 import gleam/list
 import gleam/otp/actor
 import gleam/string
+import gleam/string_tree.{type StringTree}
 
 import musicplayer/logging/logging
 import musicplayer/ui/control.{type Control}
@@ -38,7 +39,7 @@ pub fn new() -> Result(Subject(Control), String) {
         internal.clear_screen()
         internal.hide_cursor()
 
-        redraw_on_update_loop(redraw)
+        redraw_loop(redraw)
       })
 
       Ok(ui)
@@ -63,21 +64,18 @@ fn handle_message(
           |> string.append("ui - updating dimensions: ", _)
           |> logging.log
 
-          actor.continue(
+          let layout = layout.update_dimensions(state.layout, width, height)
-            State(
+
-              ..state,
+          process.send(state.redraw, layout)
-              layout: layout.update_dimensions(state.layout, width, height),
+          actor.continue(State(..state, layout:))
-            ),
-          )
         }
       }
     }
     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)
+      actor.continue(State(..state, layout:))
     }
 
     control.Exit(reply_to) -> {
@@ -88,13 +86,11 @@ fn handle_message(
   }
 }
 
-fn redraw_on_update_loop(redraw: Subject(Layout)) -> Nil {
+fn redraw_loop(redraw: Subject(Layout)) -> Nil {
-  let layout = process.receive_forever(redraw)
+  process.receive_forever(redraw)
+  |> layout.render
 
-  internal.clear_screen()
+  redraw_loop(redraw)
-  layout.render(layout, layout.Root)
-
-  redraw_on_update_loop(redraw)
 }
 
 fn update_dimensions_on_interval(ui: Subject(Control), interval_ms: Int) {
@@ -108,3 +104,28 @@ fn update_dimensions_on_interval(ui: Subject(Control), interval_ms: Int) {
   process.sleep(interval_ms)
   update_dimensions_on_interval(ui, interval_ms)
 }
+// fn render_layout(layout: Layout, from: Section) -> Nil {
+//   string_tree.new()
+//   |> render_layout_loop(layout, from, _)
+//   |> string_tree.to_string
+//   |> ui_internal.print
+// }
+
+// fn render_layout_loop(
+//   layout: Layout,
+//   from: Section,
+//   tree: StringTree,
+// ) -> StringTree {
+//   case dict.get(layout.nodes, from) {
+//     Error(_) -> tree
+//     Ok(node) -> {
+//       let acc_after_children =
+//         list.fold(node.children, tree, fn(current_acc, child_id) {
+//           render_layout_loop(layout, child_id, current_acc)
+//         })
+
+//       acc_after_children
+//       |> string_tree.append(ui_internal.chars_at(node.content, node.x, node.y))
+//     }
+//   }
+// }

test/musicplayer/ui/layout_test.gleam

@@ -0,0 +1,87 @@
+// import gleam/dict
+// import gleam/int
+// import gleeunit
+
+// import musicplayer/ui/layout.{type Node, Layout, Section}
+
+// pub fn main() -> Nil {
+//   gleeunit.main()
+// }
+
+// pub fn foo_test() {
+//   let expected = ""
+
+//   let layout =
+//     Layout(
+//       width: 80,
+//       height: 20,
+//       nodes:,
+//       dict.from_list([
+//         #(
+//           Section("Root"),
+//           Node(
+//             t: Container,
+//             content: "container",
+//             width_percent: 100,
+//             height_percent: 100,
+//             children: [
+//               Section("Row1"),
+//               Section("Row2"),
+//             ],
+//           ),
+//         ),
+//         #(
+//           Section("Row1"),
+//           Node(
+//             t: Row,
+//             content: "row 1",
+//             width_percent: 100,
+//             height_percent: 50,
+//             children: [
+//               Section("A"),
+//               Section("B"),
+//             ],
+//           ),
+//         ),
+//         #(
+//           Section("A"),
+//           Node(
+//             t: Cell,
+//             content: "cell 1",
+//             width_percent: 50,
+//             height_percent: 100,
+//             children: [],
+//           ),
+//         ),
+//         #(
+//           B,
+//           Node(
+//             t: Cell,
+//             content: "cell 2",
+//             width_percent: 50,
+//             height_percent: 100,
+//             children: [],
+//           ),
+//         ),
+//         #(
+//           Section("Row2"),
+//           Node(
+//             t: Row,
+//             content: "row 1",
+//             width_percent: 100,
+//             height_percent: 50,
+//             children: [],
+//           ),
+//         ),
+//       ]),
+//     )
+
+//   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
+
+//   let assert Ok(data) =
+//     layout.render_loop(layout, container_width, container_height)
+//   assert data == 123.456789
+// }