1 files changed, 20 insertions, 12 deletions

diff --git a/src/components/script/script_task.rs b/src/components/script/script_task.rs
index 5a5ba61ddb8..9c50b2f5b5d 100644
--- a/src/components/script/script_task.rs
+++ b/src/components/script/script_task.rs
@@ -11,7 +11,8 @@ use dom::bindings::codegen::InheritTypes::{EventTargetCast, NodeCast, ElementCas
 use dom::bindings::js::{JS, JSRef, RootCollection, Temporary, OptionalSettable};
 use dom::bindings::js::OptionalRootable;
 use dom::bindings::trace::{Traceable, Untraceable};
-use dom::bindings::utils::{Reflectable, GlobalStaticData, wrap_for_same_compartment};
+use dom::bindings::utils::{Reflectable, GlobalStaticData};
+use dom::bindings::utils::{wrap_for_same_compartment, pre_wrap};
 use dom::document::{Document, HTMLDocument, DocumentMethods, DocumentHelpers};
 use dom::element::{Element, AttributeHandlers};
 use dom::event::{Event_, ResizeEvent, ReflowEvent, ClickEvent, MouseDownEvent, MouseMoveEvent, MouseUpEvent};
@@ -94,8 +95,9 @@ pub enum ScriptMsg {
 }
 
 pub struct NewLayoutInfo {
-    pub old_id: PipelineId,
-    pub new_id: PipelineId,
+    pub old_pipeline_id: PipelineId,
+    pub new_pipeline_id: PipelineId,
+    pub subpage_id: SubpageId,
     pub layout_chan: LayoutChan,
 }
 
@@ -123,6 +125,9 @@ pub struct Page {
     /// Pipeline id associated with this page.
     pub id: PipelineId,
 
+    /// Subpage id associated with this page, if any.
+    pub subpage_id: Option<SubpageId>,
+
     /// Unique id for last reflow request; used for confirming completion reply.
     pub last_reflow_id: Traceable<Cell<uint>>,
 
@@ -171,7 +176,7 @@ pub struct PageIterator {
     stack: Vec<Rc<Page>>,
 }
 
-trait IterablePage {
+pub trait IterablePage {
     fn iter(&self) -> PageIterator;
     fn find(&self, id: PipelineId) -> Option<Rc<Page>>;
 }
@@ -193,7 +198,8 @@ impl IterablePage for Rc<Page> {
 }
 
 impl Page {
-    fn new(id: PipelineId, layout_chan: LayoutChan,
+    fn new(id: PipelineId, subpage_id: Option<SubpageId>,
+           layout_chan: LayoutChan,
            window_size: Size2D<uint>, resource_task: ResourceTask,
            constellation_chan: ConstellationChan,
            js_context: Rc<Cx>) -> Page {
@@ -203,6 +209,7 @@ impl Page {
         };
         Page {
             id: id,
+            subpage_id: subpage_id,
             frame: Traceable::new(RefCell::new(None)),
             layout_chan: Untraceable::new(layout_chan),
             layout_join_port: Untraceable::new(RefCell::new(None)),
@@ -609,7 +616,7 @@ impl ScriptTask {
                window_size: Size2D<uint>)
                -> Rc<ScriptTask> {
         let (js_runtime, js_context) = ScriptTask::new_rt_and_cx();
-        let page = Page::new(id, layout_chan, window_size,
+        let page = Page::new(id, None, layout_chan, window_size,
                              resource_task.clone(),
                              constellation_chan.clone(),
                              js_context.clone());
@@ -644,11 +651,11 @@ impl ScriptTask {
             let callback = JS_SetWrapObjectCallbacks((*js_runtime).ptr,
                                                      ptr::null(),
                                                      wrap_for_same_compartment,
-                                                     ptr::null());
+                                                     None);
             JS_SetWrapObjectCallbacks((*js_runtime).ptr,
                                       callback,
                                       wrap_for_same_compartment,
-                                      ptr::null());
+                                      Some(pre_wrap));
         }
 
         let js_context = js_runtime.cx();
@@ -786,18 +793,19 @@ impl ScriptTask {
     fn handle_new_layout(&self, new_layout_info: NewLayoutInfo) {
         debug!("Script: new layout: {:?}", new_layout_info);
         let NewLayoutInfo {
-            old_id,
-            new_id,
+            old_pipeline_id,
+            new_pipeline_id,
+            subpage_id,
             layout_chan
         } = new_layout_info;
 
         let mut page = self.page.borrow_mut();
-        let parent_page = page.find(old_id).expect("ScriptTask: received a layout
+        let parent_page = page.find(old_pipeline_id).expect("ScriptTask: received a layout
             whose parent has a PipelineId which does not correspond to a pipeline in the script
             task's page tree. This is a bug.");
         let new_page = {
             let window_size = parent_page.window_size.deref().get();
-            Page::new(new_id, layout_chan, window_size,
+            Page::new(new_pipeline_id, Some(subpage_id), layout_chan, window_size,
                       parent_page.resource_task.deref().clone(),
                       self.constellation_chan.clone(),
                       self.js_context.borrow().get_ref().clone())