45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_a11y_MsaaIdGenerator_h
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#define mozilla_a11y_MsaaIdGenerator_h
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#include "mozilla/a11y/IDSet.h"
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#include "mozilla/NotNull.h"
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#include "nsITimer.h"
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namespace mozilla {
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namespace a11y {
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class MsaaAccessible;
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/**
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* This class is responsible for generating child IDs used by our MSAA
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* implementation.
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*/
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class MsaaIdGenerator {
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public:
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uint32_t GetID();
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void ReleaseID(NotNull<MsaaAccessible*> aMsaaAcc);
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private:
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bool ReleaseID(uint32_t aID);
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void ReleasePendingIDs();
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private:
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static constexpr uint32_t kNumFullIDBits = 31UL;
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IDSet mIDSet{kNumFullIDBits};
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nsTArray<uint32_t> mIDsToRelease;
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nsCOMPtr<nsITimer> mReleaseIDTimer;
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// Whether GetID has been called yet this session.
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bool mGetIDCalled = false;
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};
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} // namespace a11y
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} // namespace mozilla
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#endif // mozilla_a11y_MsaaIdGenerator_h
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