115 lines
3.0 KiB
C++
115 lines
3.0 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 "Accessible-inl.h"
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namespace mozilla {
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namespace a11y {
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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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{
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public:
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~AccGroupInfo() { MOZ_COUNT_DTOR(AccGroupInfo); }
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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 { return mParent; }
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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(Accessible* aAccessible)
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{
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mozilla::a11y::role role = aAccessible->Role();
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if (role != mozilla::a11y::roles::ROW &&
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role != mozilla::a11y::roles::OUTLINEITEM &&
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role != mozilla::a11y::roles::OPTION &&
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role != mozilla::a11y::roles::LISTITEM &&
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role != mozilla::a11y::roles::MENUITEM &&
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role != mozilla::a11y::roles::COMBOBOX_OPTION &&
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role != mozilla::a11y::roles::RICH_OPTION &&
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role != mozilla::a11y::roles::CHECK_RICH_OPTION &&
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role != mozilla::a11y::roles::PARENT_MENUITEM &&
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role != mozilla::a11y::roles::CHECK_MENU_ITEM &&
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role != mozilla::a11y::roles::RADIO_MENU_ITEM &&
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role != mozilla::a11y::roles::RADIOBUTTON &&
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role != mozilla::a11y::roles::PAGETAB)
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return nullptr;
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AccGroupInfo* info = new AccGroupInfo(aAccessible, BaseRole(role));
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return info;
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}
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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(Accessible* aContainer);
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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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protected:
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AccGroupInfo(Accessible* aItem, a11y::role aRole);
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private:
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AccGroupInfo() = delete;
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AccGroupInfo(const AccGroupInfo&) = delete;
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AccGroupInfo& operator =(const AccGroupInfo&) = delete;
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static mozilla::a11y::role BaseRole(mozilla::a11y::role aRole)
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{
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if (aRole == mozilla::a11y::roles::CHECK_MENU_ITEM ||
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aRole == mozilla::a11y::roles::PARENT_MENUITEM ||
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aRole == mozilla::a11y::roles::RADIO_MENU_ITEM)
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return mozilla::a11y::roles::MENUITEM;
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if (aRole == mozilla::a11y::roles::CHECK_RICH_OPTION)
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return mozilla::a11y::roles::RICH_OPTION;
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return aRole;
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}
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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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uint32_t mPosInSet;
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uint32_t mSetSize;
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Accessible* mParent;
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Accessible* mItem;
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a11y::role mRole;
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};
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} // namespace mozilla
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} // namespace a11y
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#endif
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