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/* 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_EmbeddedObjCollector_h__
#define mozilla_a11y_EmbeddedObjCollector_h__
#include "nsTArray.h"
namespace mozilla {
namespace a11y {
class Accessible;
/**
* Collect embedded objects. Provide quick access to accessible by index and
* vice versa.
*/
class EmbeddedObjCollector final {
public:
~EmbeddedObjCollector() {}
/**
* Return index of the given accessible within the collection.
*/
int32_t GetIndexAt(Accessible* aAccessible);
/**
* Return accessible count within the collection.
*/
uint32_t Count();
/**
* Return an accessible from the collection at the given index.
*/
Accessible* GetAccessibleAt(uint32_t aIndex);
protected:
/**
* Ensure accessible at the given index is stored and return it.
*/
Accessible* EnsureNGetObject(uint32_t aIndex);
/**
* Ensure index for the given accessible is stored and return it.
*/
int32_t EnsureNGetIndex(Accessible* aAccessible);
// Make sure it's used by Accessible class only.
explicit EmbeddedObjCollector(Accessible* aRoot)
: mRoot(aRoot), mRootChildIdx(0) {}
/**
* Append the object to collection.
*/
void AppendObject(Accessible* aAccessible);
friend class Accessible;
Accessible* mRoot;
uint32_t mRootChildIdx;
nsTArray<Accessible*> mObjects;
};
} // namespace a11y
} // namespace mozilla
#endif
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