[oden] It's a start

oden-js/src/conversion/from.rs

@@ -1,4 +1,4 @@
-use crate::{ContextRef, Error, Result, ValueRef};
+use crate::{ContextRef, Error, Result, Value, ValueRef};
 use std::num::TryFromIntError;
 
 pub trait TryFromValue: Sized {
@@ -98,10 +98,9 @@ impl TryFromValue for String {
     }
 }
 
-// impl<'c, T: Class> TryFrom<&'c ValueRef<'_>> for T {
-//
-//     #[inline]
-//     fn try_from_value(value: &ValueRef, ctx:&ContextRef) -> Result< Self> {
-//         T::from_value(value)
-//     }
-// }
+impl TryFromValue for Value {
+    #[inline]
+    fn try_from_value(value: &ValueRef, ctx: &ContextRef) -> Result<Self> {
+        Ok(value.dup(ctx))
+    }
+}

src/main.js

@@ -1,4 +1,5 @@
 function init() {
+  graphics.print("Hello world!");
   // console.log("Hello world!");
 }
 

src/script.rs

@@ -1,21 +1,61 @@
-use oden_js as js;
+use oden_js::{Class, ClassID, Context, ContextRef, Runtime, Value, ValueRef, ValueResult};
+
+pub struct GraphicsAPI {}
+
+impl GraphicsAPI {
+    fn print_fn(ctx: &ContextRef, _this: &ValueRef, args: &[&ValueRef]) -> ValueResult {
+        for arg in args {
+            print!("{}", arg.to_string(ctx)?);
+        }
+        println!();
+        Ok(Value::undefined(ctx))
+    }
+}
+
+impl Class for GraphicsAPI {
+    fn class_id() -> &'static ClassID {
+        static ID: ClassID = ClassID::new("GraphicsAPI");
+        &ID
+    }
+
+    fn prototype(context: &ContextRef) -> ValueResult {
+        let mut prototype = context.new_object()?;
+
+        let print = context.new_dynamic_fn(GraphicsAPI::print_fn)?;
+        prototype.set_property(context, "print", &print)?;
+
+        Ok(prototype)
+    }
+}
 
 pub struct ScriptContext {
-    context: js::Context,
-    init: js::Value,
-    update: js::Value,
-    draw: js::Value,
+    context: Context,
+    init: Value,
+    update: Value,
+    draw: Value,
 }
 
 impl ScriptContext {
     pub fn new() -> Self {
-        let runtime = js::Runtime::new();
+        let runtime = Runtime::new();
 
-        let mut context = js::Context::new(runtime);
+        let mut context = Context::new(runtime);
         context.add_intrinsic_bigfloat();
         context.add_intrinsic_bigdecimal();
         context.add_intrinsic_operators();
 
+        // TODO: This should be a module instead. Yuck.
+        let mut global = context
+            .global_object()
+            .expect("Unable to get global object");
+        let graphics = GraphicsAPI {};
+        let graphics = graphics
+            .into_value(&context)
+            .expect("Unable to wrap graphics API");
+        global
+            .set_property(&context, "graphics", &graphics)
+            .expect("Unable to establish graphics");
+
         let js = include_str!("main.js");
         let module = context
             .load_module(js, "main.js")