1 files changed, 118 insertions, 0 deletions
diff --git a/dom/base/TabGroup.h b/dom/base/TabGroup.h
new file mode 100644
index 0000000000..f9fa9eec5c
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+++ b/dom/base/TabGroup.h
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef TabGroup_h
+#define TabGroup_h
+
+#include "nsISupports.h"
+#include "nsISupportsImpl.h"
+#include "nsIPrincipal.h"
+#include "nsTHashtable.h"
+#include "nsString.h"
+
+#include "mozilla/RefPtr.h"
+
+namespace mozilla {
+class ThrottledEventQueue;
+namespace dom {
+
+// Two browsing contexts are considered "related" if they are reachable from one
+// another through window.opener, window.parent, or window.frames. This is the
+// spec concept of a "unit of related browsing contexts"
+//
+// Two browsing contexts are considered "similar-origin" if they can be made to
+// have the same origin by setting document.domain. This is the spec concept of
+// a "unit of similar-origin related browsing contexts"
+//
+// A TabGroup is a set of browsing contexts which are all "related". Within a
+// TabGroup, browsing contexts are broken into "similar-origin" DocGroups. In
+// more detail, a DocGroup is actually a collection of documents, and a
+// TabGroup is a collection of DocGroups. A TabGroup typically will contain
+// (through its DocGroups) the documents from one or more tabs related by
+// window.opener. A DocGroup is a member of exactly one TabGroup.
+
+class DocGroup;
+
+class TabGroup final : public nsISupports
+{
+private:
+  class HashEntry : public nsCStringHashKey
+  {
+  public:
+    // NOTE: Weak reference. The DocGroup destructor removes itself from its
+    // owning TabGroup.
+    DocGroup* mDocGroup;
+    explicit HashEntry(const nsACString* aKey);
+  };
+
+  typedef nsTHashtable<HashEntry> DocGroupMap;
+public:
+  typedef DocGroupMap::Iterator Iterator;
+
+  friend class DocGroup;
+
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  static TabGroup*
+  GetChromeTabGroup();
+
+  explicit TabGroup(bool aIsChrome = false);
+
+  // Get the docgroup for the corresponding doc group key.
+  // Returns null if the given key hasn't been seen yet.
+  already_AddRefed<DocGroup>
+  GetDocGroup(const nsACString& aKey);
+
+  already_AddRefed<DocGroup>
+  AddDocument(const nsACString& aKey, nsIDocument* aDocument);
+
+  // Join the specified TabGroup, returning a reference to it. If aTabGroup is
+  // nullptr, create a new tabgroup to join.
+  static already_AddRefed<TabGroup>
+  Join(nsPIDOMWindowOuter* aWindow, TabGroup* aTabGroup);
+
+  void Leave(nsPIDOMWindowOuter* aWindow);
+
+  Iterator Iter()
+  {
+    return mDocGroups.Iter();
+  }
+
+
+  // Returns the nsIDocShellTreeItem with the given name, searching each of the
+  // docShell trees which are within this TabGroup. It will pass itself as
+  // aRequestor to each docShellTreeItem which it asks to search for the name,
+  // and will not search the docShellTreeItem which is passed as aRequestor.
+  //
+  // This method is used in order to correctly namespace named windows based on
+  // their unit of related browsing contexts.
+  //
+  // It is illegal to pass in the special case-insensitive names "_blank",
+  // "_self", "_parent" or "_top", as those should be handled elsewhere.
+  nsresult
+  FindItemWithName(const nsAString& aName,
+                   nsIDocShellTreeItem* aRequestor,
+                   nsIDocShellTreeItem* aOriginalRequestor,
+                   nsIDocShellTreeItem** aFoundItem);
+
+  nsTArray<nsPIDOMWindowOuter*> GetTopLevelWindows();
+
+  // Get the event queue that associated windows can use to issue runnables to
+  // the main thread.  This may return nullptr during browser shutdown.
+  ThrottledEventQueue*
+  GetThrottledEventQueue() const;
+
+private:
+  ~TabGroup();
+  DocGroupMap mDocGroups;
+  nsTArray<nsPIDOMWindowOuter*> mWindows;
+  RefPtr<ThrottledEventQueue> mThrottledEventQueue;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // defined(TabGroup_h)