iwp

src/input/key.gleam

@@ -22,7 +22,7 @@ pub const esc = "\u{001B}"
 pub const csi = "["
 
 // input introducer
-const input_introducer = "$"
+pub const input_introducer = "::"
 
 pub fn from_list(l: List(String)) -> Key {
   case l {

src/mpv/control.gleam

@@ -10,6 +10,8 @@ import tcp/tcp.{type Socket}
 pub type Control {
   TogglePlayPause
 
+  Search
+
   Exit
 }
 
@@ -17,7 +19,12 @@ pub type ControlError {
   ControlError(details: String)
 }
 
+// TODO this should also have a context:
+// `/` in "artist list" "context will should be`control.Search`
+// `<some char>` in "create new playlist" context should be `control.Input`
+// `q` in most contexts should be `Exit`, but in a popup it should be `Close`
 pub fn from_key(key: Key) -> Result(Control, Nil) {
+  echo key
   case key {
     key.Char(char) -> char_control(char)
     _ -> Error(Nil)
@@ -28,6 +35,7 @@ fn char_control(char: String) -> Result(Control, Nil) {
   case char {
     " " -> Ok(TogglePlayPause)
     "q" -> Ok(Exit)
+    "/" -> Ok(Search)
     _ -> Error(Nil)
   }
 }

src/mpv/mpv.gleam

@@ -4,13 +4,13 @@ import gleam/otp/actor
 import gleam/result
 import gleam/string
 
-import input/key
+import input/key.{type Key}
 import mpv/control.{type Control}
 import tcp/reason
 import tcp/tcp.{type Socket}
 
-type State(socket, exit) {
-  State(socket: Socket, exit: Subject(Nil))
+type State(socket, inject_input, exit) {
+  State(socket: Socket, inject_input: Subject(Key), exit: Subject(Nil))
 }
 
 pub fn new(exit: Subject(Nil)) -> Result(Nil, String) {
@@ -20,8 +20,14 @@ pub fn new(exit: Subject(Nil)) -> Result(Nil, String) {
   case tcp.connect(socket_path) {
     Error(r) -> Error("Could not connect to mpv: " <> reason.to_string(r))
     Ok(socket) -> {
+      // `inject_input` is created by name to allow the process that
+      // owns `read_input` to be able to register it, while the agent
+      // also have a reference to it to be able to inject input
+      let inject_input_name = process.new_name("inject_input")
+      let inject_input = process.named_subject(inject_input_name)
+
       case
-        actor.new(State(socket, exit))
+        actor.new(State(socket, inject_input, exit))
         |> actor.on_message(handle_message)
         |> actor.start
       {
@@ -30,7 +36,16 @@ pub fn new(exit: Subject(Nil)) -> Result(Nil, String) {
         Ok(actor.Started(data:, ..)) -> {
           echo "waiting for input"
           key.start_raw_shell()
-          process.spawn(fn() { read_input(data) })
+
+          process.spawn(fn() {
+            let input = process.new_subject()
+            let assert Ok(_) =
+              process.register(process.self(), inject_input_name)
+
+            process.send(input, key.Continue([]))
+            read_input(data, input, inject_input)
+          })
+
           Ok(Nil)
         }
       }
@@ -39,10 +54,14 @@ pub fn new(exit: Subject(Nil)) -> Result(Nil, String) {
 }
 
 fn handle_message(
-  state: State(socket, exit),
+  state: State(socket, inject, exit),
   control: Control,
-) -> actor.Next(State(socket, exit), Control) {
+) -> actor.Next(State(socket, inject, exit), Control) {
   case control {
+    control.Search -> {
+      process.send(state.inject_input, key.Continue([key.input_introducer]))
+      actor.continue(state)
+    }
     control.TogglePlayPause -> {
       echo "toggling play/pause"
 
@@ -65,14 +84,40 @@ fn handle_message(
   }
 }
 
-fn read_input(subject: Subject(Control)) -> Nil {
+/// read_input selects from two subjects: `input` and `inject`
+/// `inject` can be used by the agent to send back input character(s)
+/// to force the input to be something other than user input.
+///
+/// This is useful to create a `Key` without the user having to
+/// input all of the character(s), to then be able to create a
+/// `Control` from that `Key`
+fn read_input(
+  agent: Subject(Control),
+  input: Subject(Key),
+  inject_input: Subject(Key),
+) -> Nil {
+  let buffer = case
+    process.new_selector()
+    |> process.select(input)
+    |> process.select(inject_input)
+    |> process.selector_receive_forever
+  {
+    key.Continue(buffer) -> buffer
+    _ -> []
+  }
+
   case
-    key.read_input_until_key([])
+    key.read_input_until_key(buffer)
     |> control.from_key
   {
     Error(_) -> Nil
-    Ok(control) -> process.send(subject, control)
+    Ok(control) -> process.send(agent, control)
   }
 
-  read_input(subject)
+  // currently needed to allow injects to be received. not nice
+  // maybe timed out select on inject first, then normal?
+  process.sleep(100)
+
+  process.send(input, key.Continue([]))
+  read_input(agent, input, inject_input)
 }