Initial Commit

.gitignore

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+target/
+Cargo.lock

Cargo.toml

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+[package]
+name = "mosaic-tile"
+version = "0.1.0"
+authors = ["Brooks J Rady <b.j.rady@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"

src/keys.rs

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+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialOrd, PartialEq, Eq, Clone, Copy, Hash, Serialize, Deserialize)]
+pub struct KeyEvent {
+    pub code: KeyCode,
+    pub modifiers: KeyModifiers,
+}
+
+#[derive(Debug, PartialOrd, PartialEq, Eq, Clone, Copy, Hash, Serialize, Deserialize)]
+pub struct KeyModifiers {
+    pub bits: u8,
+    //pub shift: bool,
+    //pub ctrl: bool,
+    //pub alt: bool,
+}
+
+#[derive(Debug, PartialOrd, PartialEq, Eq, Clone, Copy, Hash, Serialize, Deserialize)]
+pub enum KeyCode {
+    Backspace,
+    Enter,
+    Left,
+    Right,
+    Up,
+    Down,
+    Home,
+    End,
+    PageUp,
+    PageDown,
+    Tab,
+    BackTab,
+    Delete,
+    Insert,
+    F(u8),
+    Char(char),
+    Null,
+    Esc,
+}

src/lib.rs

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+mod keys;
+mod shim;
+
+pub use keys::*;
+pub use shim::*;
+
+pub trait MosaicPlugin {
+    fn init(&mut self);
+    fn draw(&mut self, rows: usize, cols: usize);
+    fn handle_key(&mut self, key: KeyEvent);
+}
+
+#[macro_export]
+macro_rules! register_plugin {
+    ($t:ty) => {
+        use mosaic_plugin::*;
+
+        use std::cell::RefCell;
+        thread_local! {
+            static STATE: RefCell<$t> = RefCell::new(Default::default());
+        }
+
+        fn main() {
+            STATE.with(|state| {
+                state.borrow_mut().init();
+            });
+        }
+
+        #[no_mangle]
+        pub fn draw(rows: i32, cols: i32) {
+            STATE.with(|state| {
+                state.borrow_mut().draw(rows as usize, cols as usize);
+            });
+        }
+
+        #[no_mangle]
+        pub fn handle_key() {
+            STATE.with(|state| {
+                state.borrow_mut().handle_key(get_key());
+            });
+        }
+    };
+}

src/shim.rs

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+use crate::keys::KeyEvent;
+use std::{io, path::Path};
+
+pub fn get_key() -> KeyEvent {
+    let mut json = String::new();
+    io::stdin().read_line(&mut json).unwrap();
+    serde_json::from_str(&json).unwrap()
+}
+
+pub fn open_file(path: &Path) {
+    println!("{}", path.to_string_lossy());
+    unsafe { host_open_file() };
+}
+
+#[link(wasm_import_module = "mosaic")]
+extern "C" {
+    fn host_open_file();
+}