gecko-dev/docshell/base/BaseHistory.h
Emilio Cobos Álvarez f9bd47e44b Bug 1626586 - Make history notifications do a bit less work. r=mak,lina,agi,snorp
And batch them when notifying child processes.

This makes RegisterVisitedQuery potentially notify synchronously, but changes
the code to deal with it properly.

Differential Revision: https://phabricator.services.mozilla.com/D69187

--HG--
extra : moz-landing-system : lando
2020-04-15 21:19:41 +00:00

77 lines
2.5 KiB
C++

/* 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 mozilla_BaseHistory_h
#define mozilla_BaseHistory_h
#include "IHistory.h"
#include "mozilla/dom/ContentParent.h"
/* A base class for history implementations that implement link coloring. */
namespace mozilla {
class BaseHistory : public IHistory {
public:
void RegisterVisitedCallback(nsIURI*, dom::Link*) final;
void UnregisterVisitedCallback(nsIURI*, dom::Link*) final;
void NotifyVisited(nsIURI*, VisitedStatus) final;
protected:
void NotifyVisitedInThisProcess(nsIURI*, VisitedStatus);
void NotifyVisitedFromParent(nsIURI*, VisitedStatus);
static constexpr const size_t kTrackedUrisInitialSize = 64;
BaseHistory();
~BaseHistory();
using ObserverArray = nsTObserverArray<dom::Link*>;
struct ObservingLinks {
ObserverArray mLinks;
VisitedStatus mStatus = VisitedStatus::Unknown;
size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
return mLinks.ShallowSizeOfExcludingThis(aMallocSizeOf);
}
};
using PendingVisitedQueries = nsTHashtable<nsURIHashKey>;
using PendingVisitedResults = nsTArray<mozilla::dom::VisitedQueryResult>;
// Starts all the queries in the pending queries list, potentially at the same
// time.
virtual void StartPendingVisitedQueries(const PendingVisitedQueries&) = 0;
private:
void ScheduleVisitedQuery(nsIURI*);
// Cancels a visited query, if it is at all possible, because we know we won't
// use the results anymore.
void CancelVisitedQueryIfPossible(nsIURI*);
void SendPendingVisitedResultsToChildProcesses();
protected:
// A map from URI to links that depend on that URI, and whether that URI is
// known-to-be-visited-or-unvisited already.
nsDataHashtable<nsURIHashKey, ObservingLinks> mTrackedURIs;
private:
// The set of pending URIs that we haven't queried yet but need to.
PendingVisitedQueries mPendingQueries;
// The set of pending query results that we still haven't dispatched to child
// processes.
PendingVisitedResults mPendingResults;
// Whether we've successfully scheduled a runnable to call
// StartPendingVisitedQueries already.
bool mStartPendingVisitedQueriesScheduled = false;
// Whether we've successfully scheduled a runnable to call
// SendPendingVisitedResultsToChildProcesses already.
bool mStartPendingResultsScheduled = false;
};
} // namespace mozilla
#endif