continue messageport, transferable, postmessage options

components/script_traits/lib.rs

@@ -17,8 +17,10 @@ extern crate malloc_size_of_derive;
 extern crate serde;
 
 mod script_msg;
+pub mod transferable;
 pub mod webdriver_msg;
 
+use crate::transferable::MessagePortImpl;
 use crate::webdriver_msg::{LoadStatus, WebDriverScriptCommand};
 use bluetooth_traits::BluetoothRequest;
 use canvas_traits::webgl::WebGLPipeline;
@@ -36,7 +38,7 @@ use keyboard_types::{CompositionEvent, KeyboardEvent};
 use libc::c_void;
 use media::WindowGLContext;
 use msg::constellation_msg::BackgroundHangMonitorRegister;
-use msg::constellation_msg::{BrowsingContextId, HistoryStateId, PipelineId};
+use msg::constellation_msg::{BrowsingContextId, HistoryStateId, MessagePortId, PipelineId};
 use msg::constellation_msg::{PipelineNamespaceId, TopLevelBrowsingContextId, TraversalDirection};
 use net_traits::image::base::Image;
 use net_traits::image_cache::ImageCache;
@@ -51,7 +53,7 @@ use servo_atoms::Atom;
 use servo_url::ImmutableOrigin;
 use servo_url::ServoUrl;
 use std::borrow::Cow;
-use std::collections::HashMap;
+use std::collections::{HashMap, VecDeque};
 use std::fmt;
 use std::sync::atomic::AtomicBool;
 use std::sync::Arc;
@@ -324,8 +326,11 @@ pub enum ConstellationControlMsg {
         source_browsing_context: TopLevelBrowsingContextId,
         /// The expected origin of the target.
         target_origin: Option<ImmutableOrigin>,
+        /// The source origin of the message.
+        /// https://html.spec.whatwg.org/multipage/#dom-messageevent-origin
+        source_origin: ImmutableOrigin,
         /// The data to be posted.
-        data: Vec<u8>,
+        data: StructuredSerializedData,
     },
     /// Updates the current pipeline ID of a given iframe.
     /// First PipelineId is for the parent, second is the new PipelineId for the frame.
@@ -1013,3 +1018,33 @@ impl ScriptToConstellationChan {
         self.sender.send((self.pipeline_id, msg))
     }
 }
+
+/// A data-holder for serialized data and transferred objects.
+/// <https://html.spec.whatwg.org/multipage/#structuredserializewithtransfer>
+#[derive(Debug, Deserialize, MallocSizeOf, Serialize)]
+pub struct StructuredSerializedData {
+    /// Data serialized by SpiderMonkey.
+    pub serialized: Vec<u8>,
+    /// Transferred objects.
+    pub ports: Option<HashMap<MessagePortId, MessagePortImpl>>,
+}
+
+/// A task on the https://html.spec.whatwg.org/multipage/#port-message-queue
+#[derive(Debug, Deserialize, MallocSizeOf, Serialize)]
+pub struct PortMessageTask {
+    /// The origin of this task.
+    pub origin: ImmutableOrigin,
+    /// A data-holder for serialized data and transferred objects.
+    pub data: StructuredSerializedData,
+}
+
+/// Messages for communication between the constellation and a global managing ports.
+#[derive(Debug, Deserialize, Serialize)]
+pub enum MessagePortMsg {
+    /// Enables a port to catch-up on messages that were sent while the transfer was ongoing.
+    CompleteTransfer(MessagePortId, VecDeque<PortMessageTask>),
+    /// Remove a port, the entangled one doesn't exists anymore.
+    RemoveMessagePort(MessagePortId),
+    /// Handle a new port-message-task.
+    NewTask(MessagePortId, PortMessageTask),
+}