Engine

examples/hello_world.rs

@@ -12,23 +12,14 @@ impl Event for KeyPress {
 }
 
 fn main() {
-    let cx = Context::new(app);
+    let console = Console::new();
-    cx.refresh();
 
-    std::thread::spawn({
+    console.thread(move |ctx| loop {
-        let cx = cx.clone();
+        crossterm::event::read().unwrap();
-        move || loop {
+        ctx.emit_event_threaded(&KeyPress);
-            crossterm::event::read().unwrap();
-            cx.emit_event_threaded(&KeyPress);
-        }
     });
 
-    let (width, height) = crossterm::terminal::size().unwrap();
+    console.run(app);
-
-    loop {
-        cx.get_view()(&mut DrawContext::new(width, height));
-        std::thread::sleep(std::time::Duration::from_millis(16));
-    }
 }
 
 fn app(cx: &Arc<Context>) -> View {

src/engine.rs

@@ -0,0 +1,58 @@
+use std::sync::{Arc, Mutex};
+
+use crate::{prelude::Context, DrawContext, View};
+
+pub trait Engine {
+    fn render(&self, ctx: &mut DrawContext, view: View);
+    fn draw_text(&self, ctx: &mut DrawContext, text: &str);
+}
+
+pub struct Console {
+    threads: Mutex<Vec<Arc<dyn Fn(Arc<Context>) + Send + Sync>>>,
+}
+
+impl Console {
+    pub fn new() -> Self {
+        Self {
+            threads: Mutex::new(Vec::new()),
+        }
+    }
+
+    pub fn thread<F: Fn(Arc<Context>) + Send + Sync + 'static>(&self, run: F) {
+        self.threads.lock().unwrap().push(Arc::new(run));
+    }
+
+    pub fn run<F: Fn(&Arc<Context>) -> View + Send + Sync + 'static>(&self, component: F) {
+        let cx = Context::new(component);
+        cx.refresh();
+
+        for thread in self.threads.lock().unwrap().iter() {
+            let thread = thread.clone();
+
+            std::thread::spawn({
+                let cx = cx.clone();
+                move || thread(cx)
+            });
+        }
+
+        let (width, height) = crossterm::terminal::size().unwrap();
+
+        loop {
+            cx.get_view()(&mut DrawContext::new(width, height));
+            std::thread::sleep(std::time::Duration::from_millis(16));
+        }
+    }
+}
+
+impl Engine for Console {
+    fn render(&self, ctx: &mut DrawContext, view: View) {
+        view(&mut DrawContext::new(
+            ctx.available.width,
+            ctx.available.height,
+        ));
+    }
+
+    fn draw_text(&self, _ctx: &mut DrawContext, text: &str) {
+        println!("{}", text);
+    }
+}

src/lib.rs

@@ -1,10 +1,12 @@
 use std::sync::Arc;
 
 pub mod component;
+pub mod engine;
 pub mod state;
 
 pub mod prelude {
     pub use crate::component::*;
+    pub use crate::engine::*;
     pub use crate::state::*;
     pub use crate::{DrawContext, View};
 }
@@ -23,6 +25,9 @@ pub struct DrawContext {
     used: Size,
 }
 
+#[derive(Debug, Clone)]
+pub struct RenderContext {}
+
 impl DrawContext {
     pub fn new(width: u16, height: u16) -> Self {
         Self {