compile scripts via maybe apis

This adds the ability to compile and run an script, passing in the
ScriptOrigin so that it can track file information.

Author: cowboyd

ext/v8/maybe.h

@@ -66,6 +66,16 @@ namespace rr {
     // the underlying value.
     VALUE object;
   };
+
+  template <class T, class V>
+  class MaybeLocal : public Maybe {
+  public:
+    MaybeLocal(v8::Isolate* isolate, v8::MaybeLocal<V> maybe) {
+      if (!maybe.IsEmpty()) {
+        just(T(isolate, maybe.ToLocalChecked()));
+      }
+    }
+  };
 }
 
 #endif /* RR_MAYBE_H */

ext/v8/object.cc

@@ -62,10 +62,11 @@ namespace rr {
       return Function(isolate, handle.As<v8::Function>());
     }
 
+    if (handle->IsArray()) {
+      return Array(isolate, handle.As<v8::Array>());
+    }
+
     // TODO: Enable this when the methods are implemented
-    // if (handle->IsArray()) {
-    //   return Array((v8::Handle<v8::Array>)v8::Array::Cast(*handle));
-    // }
     //
     // if (handle->IsDate()) {
     //   // return Date(handle);

ext/v8/script-origin.h

@@ -57,6 +57,18 @@ namespace rr {
                      Bool(origin.Options().IsOpaque()))) {
     }
 
+    inline operator v8::ScriptOrigin() {
+      return v8::ScriptOrigin(
+        Value(container->name),
+        Integer(container->line_offset),
+        Integer(container->column_offset),
+        Boolean(container->is_shared_cross_origin),
+        Integer(container->script_id),
+        Boolean(container->is_embedder_debug_script),
+        Value(container->source_map_url),
+        Boolean(container->is_opaque));
+    }
+
     static void mark(Container* container) {
       rb_gc_mark(container->name);
       rb_gc_mark(container->line_offset);

ext/v8/script.cc

@@ -23,20 +23,28 @@ namespace rr {
 
 
   VALUE Script::Compile(int argc, VALUE argv[], VALUE self) {
-    VALUE source, rb_context, origin;
-    rb_scan_args(argc, argv, "21", &source, &rb_context, &origin);
-
-    Context context(rb_context);
-    Locker lock(context.getIsolate());
-
-    // TODO: ScriptOrigin
-    return Script(context.getIsolate(), v8::Script::Compile(String(source)));
+    VALUE r_source, r_context, r_origin;
+    rb_scan_args(argc, argv, "21", &r_context, &r_source, &r_origin);
+
+    Context context(r_context);
+    Isolate isolate(context.getIsolate());
+    Locker lock(isolate);
+
+
+    if (RTEST(r_origin)) {
+      v8::ScriptOrigin origin = ScriptOrigin(r_origin);
+      v8::MaybeLocal<v8::Script> script = v8::Script::Compile(context, String(r_source), &origin);
+      return Script::Maybe(isolate, script);
+    }
+    else {
+      return Script::Maybe(isolate, v8::Script::Compile(context, String(r_source)));
+    }
   }
 
   VALUE Script::Run(VALUE self, VALUE rb_context) {
     Context context(rb_context);
-    Locker lock(context->GetIsolate());
+    Locker lock(context);
 
-    return Value(context->GetIsolate(), Script(self)->Run());
+    return Value::Maybe(context, Script(self)->Run(context));
   }
 }

ext/v8/script.h

@@ -15,6 +15,7 @@ namespace rr {
 
     inline Script(VALUE value) : Ref<v8::Script>(value) {}
     inline Script(v8::Isolate* isolate, v8::Handle<v8::Script> script) : Ref<v8::Script>(isolate, script) {}
+    typedef MaybeLocal<Script, v8::Script> Maybe;
   };
 }
 #endif

ext/v8/value.h

@@ -6,22 +6,7 @@ namespace rr {
 
   class Value : public Ref<v8::Value> {
   public:
-    /**
-     * A conversion class for down-thunking a MaybeLocal<v8::Value>
-     * and returning it to Ruby as a `V8::C::Maybe`. If there is a
-     * value present, then run it through the value conversion to get
-     * the most specific subclass of Value:
-     *
-     *   return Value::Maybe(object->Get(cxt, key));
-     */
-    class Maybe : public rr::Maybe {
-    public:
-      Maybe(v8::Isolate* isolate, v8::MaybeLocal<v8::Value> maybe) {
-        if (!maybe.IsEmpty()) {
-          just(Value(isolate, maybe.ToLocalChecked()));
-        }
-      }
-    };
+    typedef MaybeLocal<Value, v8::Value> Maybe;
 
     static void Init();
 

spec/c/script_spec.rb

@@ -3,14 +3,17 @@
 describe V8::C::Script do
   requires_v8_context
 
-  # TODO
-  # it 'can run a script and return a polymorphic result' do
-  #   source = V8::C::String::New("(new Array())")
-  #   script = V8::C::Script::New(source)
-  #
-  #   result = script.Run()
-  #   expect(result).to be_an V8::C::Array
-  # end
+  it 'can run a script and return a polymorphic result' do
+    source = V8::C::String::NewFromUtf8(@isolate, "(new Array())")
+    name = V8::C::String::NewFromUtf8(@isolate, "a/file.js")
+    origin = V8::C::ScriptOrigin.new(name)
+    script = V8::C::Script::Compile(@ctx, source, origin)
+    expect(script.IsJust()).to be true
+
+    result = script.FromJust().Run(@ctx)
+    expect(result.IsJust()).to be true
+    expect(result.FromJust()).to be_an V8::C::Array
+  end
 
   # TODO
   # it 'can accept precompiled script data' do