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62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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_EventTree_h_
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#define mozilla_a11y_EventTree_h_
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#include "AccEvent.h"
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#include "LocalAccessible.h"
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#include "mozilla/a11y/DocAccessible.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/UniquePtr.h"
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namespace mozilla {
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namespace a11y {
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class NotificationController;
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/**
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* This class makes sure required tasks are done before and after tree
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* mutations. Currently this only includes group info invalidation. You must
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* have an object of this class on the stack when calling methods that mutate
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* the accessible tree.
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*/
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class TreeMutation final {
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public:
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static const bool kNoEvents = true;
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static const bool kNoShutdown = true;
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explicit TreeMutation(LocalAccessible* aParent, bool aNoEvents = false);
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~TreeMutation();
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void AfterInsertion(LocalAccessible* aChild);
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void BeforeRemoval(LocalAccessible* aChild, bool aNoShutdown = false);
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void Done();
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private:
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NotificationController* Controller() const {
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return mParent->Document()->Controller();
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}
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LocalAccessible* mParent;
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uint32_t mStartIdx;
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uint32_t mStateFlagsCopy;
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/*
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* True if mutation events should be queued.
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*/
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bool mQueueEvents;
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#ifdef DEBUG
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bool mIsDone;
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#endif
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};
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} // namespace a11y
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} // namespace mozilla
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#endif // mozilla_a11y_EventQueue_h_
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