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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 AccGroupInfo_h_
#define AccGroupInfo_h_
#include "nsISupportsImpl.h"
#include "mozilla/MemoryReporting.h"
#include "Role.h"
namespace mozilla {
namespace a11y {
class Accessible;
/**
* Calculate and store group information.
*/
class AccGroupInfo {
public:
MOZ_COUNTED_DTOR(AccGroupInfo)
AccGroupInfo() = default;
AccGroupInfo(AccGroupInfo&&) = default;
AccGroupInfo& operator=(AccGroupInfo&&) = default;
/**
* Return 1-based position in the group.
*/
uint32_t PosInSet() const { return mPosInSet; }
/**
* Return a number of items in the group.
*/
uint32_t SetSize() const { return mSetSize; }
/**
* Return a direct or logical parent of the accessible that this group info is
* created for.
*/
Accessible* ConceptualParent() const { return mParent; }
/**
* Update group information.
*/
void Update();
/**
* Create group info.
*/
static AccGroupInfo* CreateGroupInfo(const Accessible* aAccessible);
/**
* Return a first item for the given container.
*/
static Accessible* FirstItemOf(const Accessible* aContainer);
/**
* Return total number of items in container, and if it is has nested
* collections.
*/
static uint32_t TotalItemCount(Accessible* aContainer, bool* aIsHierarchical);
/**
* Return next item of the same group to the given item.
*/
static Accessible* NextItemTo(Accessible* aItem);
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf);
protected:
AccGroupInfo(const Accessible* aItem, a11y::role aRole);
private:
AccGroupInfo(const AccGroupInfo&) = delete;
AccGroupInfo& operator=(const AccGroupInfo&) = delete;
/**
* Return true if the given parent and child roles should have their node
* relations reported.
*/
static bool ShouldReportRelations(a11y::role aRole, a11y::role aParentRole);
/**
* Return ARIA level value or the default one if ARIA is missed for the
* given accessible.
*/
static int32_t GetARIAOrDefaultLevel(const Accessible* aAccessible);
uint32_t mPosInSet;
uint32_t mSetSize;
Accessible* mParent;
const Accessible* mItem;
a11y::role mRole;
};
} // namespace a11y
} // namespace mozilla
#endif
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