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102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
/* 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 AccGroupInfo_h_
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#define AccGroupInfo_h_
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#include "nsISupportsImpl.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/a11y/Role.h"
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namespace mozilla {
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namespace a11y {
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class Accessible;
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/**
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* Calculate and store group information.
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*/
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class AccGroupInfo {
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public:
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MOZ_COUNTED_DTOR(AccGroupInfo)
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AccGroupInfo() = default;
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AccGroupInfo(AccGroupInfo&&) = default;
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AccGroupInfo& operator=(AccGroupInfo&&) = default;
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/**
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* Return 1-based position in the group.
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*/
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uint32_t PosInSet() const { return mPosInSet; }
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/**
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* Return a number of items in the group.
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*/
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uint32_t SetSize() const { return mSetSize; }
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/**
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* Return a direct or logical parent of the accessible that this group info is
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* created for.
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*/
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Accessible* ConceptualParent() const;
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/**
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* Update group information.
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*/
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void Update();
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/**
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* Create group info.
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*/
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static AccGroupInfo* CreateGroupInfo(const Accessible* aAccessible);
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/**
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* Return a first item for the given container.
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*/
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static Accessible* FirstItemOf(const Accessible* aContainer);
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/**
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* Return total number of items in container, and if it is has nested
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* collections.
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*/
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static uint32_t TotalItemCount(Accessible* aContainer, bool* aIsHierarchical);
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/**
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* Return next item of the same group to the given item.
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*/
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static Accessible* NextItemTo(Accessible* aItem);
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf);
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protected:
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AccGroupInfo(const Accessible* aItem, a11y::role aRole);
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private:
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AccGroupInfo(const AccGroupInfo&) = delete;
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AccGroupInfo& operator=(const AccGroupInfo&) = delete;
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/**
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* Return true if the given parent and child roles should have their node
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* relations reported.
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*/
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static bool ShouldReportRelations(a11y::role aRole, a11y::role aParentRole);
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/**
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* Return ARIA level value or the default one if ARIA is missed for the
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* given accessible.
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*/
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static int32_t GetARIAOrDefaultLevel(const Accessible* aAccessible);
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uint32_t mPosInSet;
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uint32_t mSetSize;
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uint64_t mParentId;
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const Accessible* mItem;
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a11y::role mRole;
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};
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} // namespace a11y
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} // namespace mozilla
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#endif
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