[oden] Input

src/input.ts

@@ -1,3 +1,206 @@
+import * as core from "input-core";
+
+// NOTE: This is derived from rust's winit VirtualKeyCode as of 2023/07/07
+export const Key = {
+  /// The '1' key over the letters.
+  Key1: 1,
+  /// The '2' key over the letters.
+  Key2: 2,
+  /// The '3' key over the letters.
+  Key3: 3,
+  /// The '4' key over the letters.
+  Key4: 4,
+  /// The '5' key over the letters.
+  Key5: 5,
+  /// The '6' key over the letters.
+  Key6: 6,
+  /// The '7' key over the letters.
+  Key7: 7,
+  /// The '8' key over the letters.
+  Key8: 8,
+  /// The '9' key over the letters.
+  Key9: 9,
+  /// The '0' key over the 'O' and 'P' keys.
+  Key0: 10,
+
+  A: 11,
+  B: 12,
+  C: 13,
+  D: 14,
+  E: 15,
+  F: 16,
+  G: 17,
+  H: 18,
+  I: 19,
+  J: 20,
+  K: 21,
+  L: 22,
+  M: 23,
+  N: 24,
+  O: 25,
+  P: 26,
+  Q: 27,
+  R: 28,
+  S: 29,
+  T: 30,
+  U: 31,
+  V: 32,
+  W: 33,
+  X: 34,
+  Y: 35,
+  Z: 36,
+
+  /// The Escape key, next to F1.
+  Escape: 37,
+
+  F1: 38,
+  F2: 39,
+  F3: 40,
+  F4: 41,
+  F5: 42,
+  F6: 43,
+  F7: 44,
+  F8: 45,
+  F9: 46,
+  F10: 47,
+  F11: 48,
+  F12: 49,
+  F13: 50,
+  F14: 51,
+  F15: 52,
+  F16: 53,
+  F17: 54,
+  F18: 55,
+  F19: 56,
+  F20: 57,
+  F21: 58,
+  F22: 59,
+  F23: 60,
+  F24: 61,
+
+  /// Print Screen/SysRq.
+  Snapshot: 62,
+  /// Scroll Lock.
+  Scroll: 63,
+  /// Pause/Break key, next to Scroll lock.
+  Pause: 64,
+
+  /// `Insert`, next to Backspace.
+  Insert: 65,
+  Home: 66,
+  Delete: 67,
+  End: 68,
+  PageDown: 69,
+  PageUp: 70,
+
+  Left: 71,
+  Up: 72,
+  Right: 73,
+  Down: 74,
+
+  /// The Backspace key, right over Enter.
+  // TODO: rename
+  Back: 75,
+  /// The Enter key.
+  Return: 76,
+  /// The space bar.
+  Space: 77,
+
+  /// The "Compose" key on Linux.
+  Compose: 78,
+
+  Caret: 79,
+
+  Numlock: 80,
+  Numpad0: 81,
+  Numpad1: 82,
+  Numpad2: 83,
+  Numpad3: 84,
+  Numpad4: 85,
+  Numpad5: 86,
+  Numpad6: 87,
+  Numpad7: 88,
+  Numpad8: 89,
+  Numpad9: 90,
+  NumpadAdd: 91,
+  NumpadDivide: 92,
+  NumpadDecimal: 93,
+  NumpadComma: 94,
+  NumpadEnter: 95,
+  NumpadEquals: 96,
+  NumpadMultiply: 97,
+  NumpadSubtract: 98,
+
+  AbntC1: 99,
+  AbntC2: 100,
+  Apostrophe: 101,
+  Apps: 102,
+  Asterisk: 103,
+  At: 104,
+  Ax: 105,
+  Backslash: 106,
+  Calculator: 107,
+  Capital: 108,
+  Colon: 109,
+  Comma: 110,
+  Convert: 111,
+  Equals: 112,
+  Grave: 113,
+  Kana: 114,
+  Kanji: 115,
+  LAlt: 116,
+  LBracket: 117,
+  LControl: 118,
+  LShift: 119,
+  LWin: 120,
+  Mail: 121,
+  MediaSelect: 122,
+  MediaStop: 123,
+  Minus: 124,
+  Mute: 125,
+  MyComputer: 126,
+  // also called "Next"
+  NavigateForward: 127,
+  // also called "Prior"
+  NavigateBackward: 128,
+  NextTrack: 129,
+  NoConvert: 130,
+  OEM102: 131,
+  Period: 132,
+  PlayPause: 133,
+  Plus: 134,
+  Power: 135,
+  PrevTrack: 136,
+  RAlt: 137,
+  RBracket: 138,
+  RControl: 139,
+  RShift: 140,
+  RWin: 141,
+  Semicolon: 142,
+  Slash: 143,
+  Sleep: 144,
+  Stop: 145,
+  Sysrq: 146,
+  Tab: 147,
+  Underline: 148,
+  Unlabeled: 149,
+  VolumeDown: 150,
+  VolumeUp: 151,
+  Wake: 152,
+  WebBack: 153,
+  WebFavorites: 154,
+  WebForward: 155,
+  WebHome: 156,
+  WebRefresh: 157,
+  WebSearch: 158,
+  WebStop: 159,
+  Yen: 160,
+  Copy: 161,
+  Paste: 162,
+  Cut: 163,
+} as const;
+
+// NOTE: This must match the definition in input.rs.
 export const Button = {
   Up: 0,
   Down: 1,
@@ -6,6 +209,6 @@ export const Button = {
 } as const;
 type Button = (typeof Button)[keyof typeof Button];
 
-export function btn(_which: Button): boolean {
-  return false;
+export function btn(b: Button): boolean {
+  return core.btn(b);
 }

src/lib.rs

@@ -296,10 +296,6 @@ impl State {
         }
     }
 
-    fn input(&mut self, _event: &WindowEvent) -> bool {
-        false
-    }
-
     fn update(&mut self) {
         self.screen_uniform = ScreenUniforms::new(self.size.width, self.size.height);
         self.queue.write_buffer(
@@ -486,8 +482,8 @@ struct UIEvent {
 
 fn main_thread(state: State, reciever: Receiver<UIEvent>) {
     let mut state = state;
-    let mut context = script::ScriptContext::new();
-    context.init();
+    let mut script = script::ScriptContext::new();
+    script.init();
 
     const SPF: f64 = 1.0 / 60.0;
     loop {
@@ -502,7 +498,7 @@ fn main_thread(state: State, reciever: Receiver<UIEvent>) {
                         ref event,
                         window_id,
                     } if window_id == state.window().id() => {
-                        if !state.input(event) {
+                        if !script.input(event) {
                             match event {
                                 WindowEvent::CursorMoved { position, .. } => {
                                     state.mouse_x = position.x;
@@ -530,13 +526,13 @@ fn main_thread(state: State, reciever: Receiver<UIEvent>) {
 
         {
             let _span = span!("update");
-            context.update();
+            script.update();
             state.update();
         }
 
         {
             let _span = span!("render");
-            match state.render(context.render()) {
+            match state.render(script.render()) {
                 Ok(_) => {}
                 // Reconfigure the surface if lost
                 Err(wgpu::SurfaceError::Lost) => state.resize(state.size),

src/script.rs

@@ -6,16 +6,18 @@ use std::ffi::OsStr;
 use std::sync::mpsc::{channel, Receiver};
 use std::time::Instant;
 use tracy_client::span;
+use winit::event::*;
 
 pub mod graphics;
+mod input;
+mod io;
+mod time;
+
 use graphics::GraphicsCommand;
 
 mod typescript;
 use typescript::transpile_to_javascript;
 
-mod io;
-mod time;
-
 struct Loader {}
 
 impl Loader {
@@ -49,6 +51,7 @@ pub struct ScriptContext {
     gfx_receive: Receiver<graphics::GraphicsCommand>,
 
     time: time::TimeAPI,
+    input: input::InputAPI,
 }
 
 impl ScriptContext {
@@ -66,6 +69,8 @@ impl ScriptContext {
             .expect("Graphics module should load without error");
         let _io = io::IoAPI::define(&context).expect("IO module should load without error");
         let time = time::TimeAPI::define(&context).expect("Time module should load without error");
+        let input =
+            input::InputAPI::define(&context).expect("Input module should load without error");
 
         let module = context
             .import_module("./main.ts", "")
@@ -92,6 +97,7 @@ impl ScriptContext {
             gfx_receive,
 
             time,
+            input,
         }
     }
 
@@ -107,6 +113,13 @@ impl ScriptContext {
             .expect("Exception in init");
     }
 
+    pub fn input(&mut self, event: &WindowEvent) -> bool {
+        match event {
+            WindowEvent::KeyboardInput { input, .. } => self.input.handle_keyboard_input(input),
+            _ => false,
+        }
+    }
+
     pub fn update(&mut self) {
         let _span = span!("script update");
 

src/script/graphics.rs

@@ -3,6 +3,8 @@ use std::sync::atomic::{AtomicU32, Ordering};
 use std::sync::mpsc::Sender;
 use std::sync::Arc;
 
+// TODO: Fix the dumb command structures.
+
 #[derive(Debug)]
 pub struct PrintCommand {
     pub text: String,

src/script/input.rs

@@ -0,0 +1,132 @@
+use oden_js::{module::native::NativeModuleBuilder, ContextRef};
+use std::cell::RefCell;
+use std::sync::Arc;
+use winit::event::{ElementState, KeyboardInput, VirtualKeyCode};
+
+/// An abstraction over hardware keys.
+#[derive(Debug, Eq, PartialEq, Hash, Copy, Clone)]
+enum Button {
+    Up,
+    Down,
+    Left,
+    Right,
+}
+
+impl From<Button> for u32 {
+    fn from(v: Button) -> Self {
+        match v {
+            Button::Up => 0,
+            Button::Down => 1,
+            Button::Left => 2,
+            Button::Right => 3,
+        }
+    }
+}
+
+impl TryFrom<u32> for Button {
+    type Error = &'static str;
+    fn try_from(v: u32) -> Result<Self, Self::Error> {
+        match v {
+            0 => Ok(Button::Up),
+            1 => Ok(Button::Down),
+            2 => Ok(Button::Left),
+            3 => Ok(Button::Right),
+            _ => Err("unknown button value"),
+        }
+    }
+}
+
+struct InputState {
+    up_pressed: bool,
+    down_pressed: bool,
+    left_pressed: bool,
+    right_pressed: bool,
+}
+
+impl InputState {
+    fn new() -> Self {
+        InputState {
+            up_pressed: false,
+            down_pressed: false,
+            left_pressed: false,
+            right_pressed: false,
+        }
+    }
+
+    fn handle_keyboard_input(&mut self, input: &KeyboardInput) -> bool {
+        let pressed = input.state == ElementState::Pressed;
+        match input.virtual_keycode {
+            Some(VirtualKeyCode::Left) => {
+                self.left_pressed = pressed;
+                true
+            }
+            Some(VirtualKeyCode::Right) => {
+                self.right_pressed = pressed;
+                true
+            }
+            Some(VirtualKeyCode::Up) => {
+                self.up_pressed = pressed;
+                true
+            }
+            Some(VirtualKeyCode::Down) => {
+                self.down_pressed = pressed;
+                true
+            }
+            _ => false,
+        }
+    }
+}
+
+struct InputImpl {
+    state: RefCell<InputState>,
+}
+
+impl InputImpl {
+    fn new() -> Self {
+        InputImpl {
+            state: RefCell::new(InputState::new()),
+        }
+    }
+
+    fn handle_keyboard_input(&self, input: &KeyboardInput) -> bool {
+        self.state.borrow_mut().handle_keyboard_input(input)
+    }
+
+    fn btn(&self, button: u32) -> bool {
+        if let Ok(b) = Button::try_from(button) {
+            let state = self.state.borrow();
+            match b {
+                Button::Up => state.up_pressed,
+                Button::Down => state.down_pressed,
+                Button::Left => state.left_pressed,
+                Button::Right => state.right_pressed,
+            }
+        } else {
+            false
+        }
+    }
+}
+
+pub struct InputAPI {
+    input: Arc<InputImpl>,
+}
+
+impl InputAPI {
+    pub fn define(ctx: &ContextRef) -> oden_js::Result<Self> {
+        let input = Arc::new(InputImpl::new());
+        let mut builder = NativeModuleBuilder::new(ctx);
+        {
+            let input = input.clone();
+            builder.export(
+                "btn",
+                ctx.new_fn(move |_ctx: &ContextRef, b: u32| input.btn(b))?,
+            )?;
+        }
+        builder.build("input-core")?;
+        Ok(InputAPI { input })
+    }
+
+    pub fn handle_keyboard_input(&mut self, input: &KeyboardInput) -> bool {
+        self.input.handle_keyboard_input(input)
+    }
+}

types/input-core.d.ts

@@ -0,0 +1,3 @@
+// These are the functions exposed by the native input module.
+//
+export function btn(b: number): boolean;