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