Add script execution support via WebDriver

components/webdriver_traits/lib.rs

@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#![crate_name = "webdriver_traits"]
+#![crate_type = "rlib"]
+
+extern crate "rustc-serialize" as rustc_serialize;
+use rustc_serialize::json::{Json, ToJson};
+
+use std::sync::mpsc::Sender;
+
+pub enum WebDriverScriptCommand {
+    EvaluateJS(String, Sender<Result<EvaluateJSReply, ()>>)
+}
+
+pub enum EvaluateJSReply {
+    VoidValue,
+    NullValue,
+    BooleanValue(bool),
+    NumberValue(f64),
+    StringValue(String),
+    // TODO: ObjectValue and WebElementValue
+}
+
+impl ToJson for EvaluateJSReply {
+    fn to_json(&self) -> Json {
+        match self {
+            &EvaluateJSReply::VoidValue => Json::Null,
+            &EvaluateJSReply::NullValue => Json::Null,
+            &EvaluateJSReply::BooleanValue(ref x) => x.to_json(),
+            &EvaluateJSReply::NumberValue(ref x) => x.to_json(),
+            &EvaluateJSReply::StringValue(ref x) => x.to_json()
+        }
+    }
+}