Bug 888972 - part 1 - add nsIFrameScriptLoader.getDelayedFrameScripts(); r=smaug

content/base/public/nsIMessageManager.idl

@@ -5,6 +5,7 @@
 
 #include "nsISupports.idl"
 
+interface nsIDOMDOMStringList;
 interface nsIDOMWindow;
 interface nsIDocShell;
 interface nsIContent;
@@ -320,7 +321,7 @@ interface nsIInProcessContentFrameMessageManager : nsIContentFrameMessageManager
   [notxpcom] nsIContent getOwnerContent();
 };
 
-[scriptable, builtinclass, uuid(a54acd34-4141-46f5-b71b-e2ca32879b08)]
+[scriptable, builtinclass, uuid(ecebfb8c-ff51-11e2-9d65-7af553959281)]
 interface nsIFrameScriptLoader : nsISupports
 {
   /**
@@ -336,6 +337,12 @@ interface nsIFrameScriptLoader : nsISupports
    * Removes aURL from the list of scripts which support delayed load.
    */
   void removeDelayedFrameScript(in AString aURL);
+
+  /**
+   * Returns a list of all delayed scripts that will be loaded once
+   * a (remote) frame becomes available.
+   */
+  nsIDOMDOMStringList getDelayedFrameScripts();
 };
 
 [scriptable, builtinclass, uuid(b37821ff-df79-44d4-821c-6d6ec4dfe1e9)]

content/base/src/nsFrameMessageManager.cpp

@@ -33,6 +33,7 @@
 #include "mozilla/dom/StructuredCloneUtils.h"
 #include "JavaScriptChild.h"
 #include "JavaScriptParent.h"
+#include "nsDOMLists.h"
 #include <algorithm>
 
 #ifdef ANDROID
@@ -316,6 +317,28 @@ nsFrameMessageManager::RemoveDelayedFrameScript(const nsAString& aURL)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsFrameMessageManager::GetDelayedFrameScripts(nsIDOMDOMStringList** aList)
+{
+  // Frame message managers may return an incomplete list because scripts
+  // that were loaded after it was connected are not added to the list.
+  if (!IsGlobal() && !IsWindowLevel()) {
+    NS_WARNING("Cannot retrieve list of pending frame scripts for frame"
+               "message managers as it may be incomplete");
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  nsRefPtr<nsDOMStringList> scripts = new nsDOMStringList();
+
+  for (uint32_t i = 0; i < mPendingScripts.Length(); ++i) {
+    scripts->Add(mPendingScripts[i]);
+  }
+
+  scripts.forget(aList);
+
+  return NS_OK;
+}
+
 static JSBool
 JSONCreator(const jschar* aBuf, uint32_t aLen, void* aData)
 {