Add script execution support via WebDriver

components/script/webdriver_handlers.rs

@@ -0,0 +1,38 @@
+/* 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/. */
+
+use webdriver_traits::{EvaluateJSReply};
+use dom::bindings::conversions::FromJSValConvertible;
+use dom::bindings::conversions::StringificationBehavior;
+use dom::bindings::js::OptionalRootable;
+use dom::window::ScriptHelpers;
+use dom::document::DocumentHelpers;
+use page::Page;
+use msg::constellation_msg::PipelineId;
+use script_task::get_page;
+
+use std::rc::Rc;
+use std::sync::mpsc::Sender;
+
+pub fn handle_evaluate_js(page: &Rc<Page>, pipeline: PipelineId, eval: String, reply: Sender<Result<EvaluateJSReply, ()>>){
+    let page = get_page(&*page, pipeline);
+    let window = page.window().root();
+    let cx = window.r().get_cx();
+    let rval = window.r().evaluate_js_on_global_with_result(&eval);
+
+    reply.send(if rval.is_undefined() {
+        Ok(EvaluateJSReply::VoidValue)
+    } else if rval.is_boolean() {
+        Ok(EvaluateJSReply::BooleanValue(rval.to_boolean()))
+    } else if rval.is_double() {
+        Ok(EvaluateJSReply::NumberValue(FromJSValConvertible::from_jsval(cx, rval, ()).unwrap()))
+    } else if rval.is_string() {
+        //FIXME: use jsstring_to_str when jsval grows to_jsstring
+        Ok(EvaluateJSReply::StringValue(FromJSValConvertible::from_jsval(cx, rval, StringificationBehavior::Default).unwrap()))
+    } else if rval.is_null() {
+        Ok(EvaluateJSReply::NullValue)
+    } else {
+        Err(())
+    }).unwrap();
+}