зеркало из https://github.com/mozilla/gecko-dev.git
120 строки
4.6 KiB
C++
120 строки
4.6 KiB
C++
/* -*- 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 GroupedSHistory_h
|
|
#define GroupedSHistory_h
|
|
|
|
#include "nsIFrameLoader.h"
|
|
#include "nsIGroupedSHistory.h"
|
|
#include "nsIPartialSHistory.h"
|
|
#include "nsTArray.h"
|
|
#include "nsWeakReference.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
|
|
/**
|
|
* GroupedSHistory connects session histories across multiple frameloaders.
|
|
* Each frameloader has a PartialSHistory, and GroupedSHistory has an array
|
|
* refering to all participating PartialSHistory(s).
|
|
*
|
|
* The following figure illustrates the idea. In this case, the GroupedSHistory
|
|
* is composed of 3 frameloaders, and the active one is frameloader 1.
|
|
* GroupedSHistory is always attached to the active frameloader.
|
|
*
|
|
* +----------------------------------------------------+
|
|
* | |
|
|
* | v
|
|
* +------------------+ +-------------------+ +-----------------+
|
|
* | FrameLoader 1 | | PartialSHistory 1 | | GroupedSHistory |
|
|
* | (active) |----->| (active) |<--+---| |
|
|
* +------------------+ +-------------------+ | +-----------------+
|
|
* |
|
|
* +------------------+ +-------------------+ |
|
|
* | FrameLoader 2 | | PartialSHistory 2 | |
|
|
* | (inactive) |----->| (inactive) |<--+
|
|
* +------------------+ +-------------------+ |
|
|
* |
|
|
* +------------------+ +-------------------+ |
|
|
* | FrameLoader 3 | | PartialSHistory 3 | |
|
|
* | (inactive) |----->| (inactive) |<--+
|
|
* +------------------+ +-------------------+
|
|
*
|
|
* If a history navigation leads to frameloader 3, it becomes the active one,
|
|
* and GroupedSHistory is re-attached to frameloader 3.
|
|
*
|
|
* +------------------+ +-------------------+
|
|
* | FrameLoader 1 | | PartialSHistory 1 |
|
|
* | (inactive) |----->| (inactive) |<--+
|
|
* +------------------+ +-------------------+ |
|
|
* |
|
|
* +------------------+ +-------------------+ |
|
|
* | FrameLoader 2 | | PartialSHistory 2 | |
|
|
* | (inactive) |----->| (inactive) |<--+
|
|
* +------------------+ +-------------------+ |
|
|
* |
|
|
* +------------------+ +-------------------+ | +-----------------+
|
|
* | FrameLoader 3 | | PartialSHistory 3 | | | GroupedSHistory |
|
|
* | (active) |----->| (active) |<--+---| |
|
|
* +------------------+ +-------------------+ +-----------------+
|
|
* | ^
|
|
* | |
|
|
* +----------------------------------------------------+
|
|
*/
|
|
class GroupedSHistory final : public nsIGroupedSHistory
|
|
{
|
|
public:
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_CLASS(GroupedSHistory)
|
|
NS_DECL_NSIGROUPEDSHISTORY
|
|
GroupedSHistory();
|
|
|
|
/**
|
|
* Get the value of preference "browser.groupedhistory.enabled" to determine
|
|
* if grouped session history should be enabled.
|
|
*/
|
|
static bool GroupedHistoryEnabled();
|
|
|
|
private:
|
|
~GroupedSHistory() {}
|
|
|
|
/**
|
|
* Remove all partial histories and close tabs after the given index (of
|
|
* mPartialHistories, not the index of session history entries).
|
|
*/
|
|
void PurgePartialHistories(uint32_t aLastPartialIndexToKeep);
|
|
|
|
/**
|
|
* Remove the frameloaders which are owned by the prerendering history, and
|
|
* remove them from mPrerenderingHistories.
|
|
*/
|
|
void PurgePrerendering();
|
|
|
|
// The total number of entries in all partial histories.
|
|
uint32_t mCount;
|
|
|
|
// The index of currently active partial history in mPartialHistories.
|
|
// Use int32_t as we have invalid index and nsCOMArray also uses int32_t.
|
|
int32_t mIndexOfActivePartialHistory;
|
|
|
|
// All participating nsIPartialSHistory objects.
|
|
nsCOMArray<nsIPartialSHistory> mPartialHistories;
|
|
|
|
// All nsIPartialSHistories which are being prerendered.
|
|
struct PrerenderingHistory
|
|
{
|
|
nsCOMPtr<nsIPartialSHistory> mPartialHistory;
|
|
int32_t mId;
|
|
};
|
|
nsTArray<PrerenderingHistory> mPrerenderingHistories;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif /* GroupedSHistory_h */
|