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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsIDocument.h"
#include "nsISupports.h"
#include "nsISupportsImpl.h"
#include "nsIPrincipal.h"
#include "nsTHashtable.h"
#include "nsHashKeys.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)
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