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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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 mozilla_a11y_MsaaIdGenerator_h
#define mozilla_a11y_MsaaIdGenerator_h
#include "mozilla/a11y/IDSet.h"
#include "mozilla/NotNull.h"
#include "nsITimer.h"
namespace mozilla {
namespace a11y {
class MsaaAccessible;
/**
* This class is responsible for generating child IDs used by our MSAA
* implementation.
*/
class MsaaIdGenerator {
public:
uint32_t GetID();
void ReleaseID(NotNull<MsaaAccessible*> aMsaaAcc);
private:
bool ReleaseID(uint32_t aID);
void ReleasePendingIDs();
static void ReleasePendingIdsCallback(nsITimer* aTimer, void* aClosure);
private:
static constexpr uint32_t kNumFullIDBits = 31UL;
IDSet mIDSet{kNumFullIDBits};
nsTArray<uint32_t> mIDsToRelease;
nsCOMPtr<nsITimer> mReleaseIDTimer;
// Whether GetID has been called yet this session.
bool mGetIDCalled = false;
};
} // namespace a11y
} // namespace mozilla
#endif // mozilla_a11y_MsaaIdGenerator_h
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