/* -*- 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_BaseAccessibles_h__ #define mozilla_a11y_BaseAccessibles_h__ #include "AccessibleWrap.h" #include "HyperTextAccessibleWrap.h" class nsIContent; /** * This file contains a number of classes that are used as base * classes for the different accessibility implementations of * the HTML and XUL widget sets. --jgaunt */ namespace mozilla { namespace a11y { /** * Leaf version of DOM Accessible -- has no children */ class LeafAccessible : public AccessibleWrap { public: LeafAccessible(nsIContent* aContent, DocAccessible* aDoc); // nsISupports NS_DECL_ISUPPORTS_INHERITED // Accessible virtual Accessible* ChildAtPoint(int32_t aX, int32_t aY, EWhichChildAtPoint aWhichChild) override; virtual bool InsertChildAt(uint32_t aIndex, Accessible* aChild) override final; virtual bool RemoveChild(Accessible* aChild) override final; virtual bool IsAcceptableChild(nsIContent* aEl) const override; protected: virtual ~LeafAccessible() {} }; /** * Used for text or image accessible nodes contained by link accessibles or * accessibles for nodes with registered click event handler. It knows how to * report the state of the host link (traveled or not) and can activate (click) * the host accessible programmatically. */ class LinkableAccessible : public AccessibleWrap { public: enum { eAction_Jump = 0 }; LinkableAccessible(nsIContent* aContent, DocAccessible* aDoc) : AccessibleWrap(aContent, aDoc) { } NS_DECL_ISUPPORTS_INHERITED // Accessible virtual void Value(nsString& aValue) override; virtual uint64_t NativeLinkState() const override; virtual void TakeFocus() override; // ActionAccessible virtual uint8_t ActionCount() override; virtual void ActionNameAt(uint8_t aIndex, nsAString& aName) override; virtual bool DoAction(uint8_t index) override; virtual KeyBinding AccessKey() const override; // ActionAccessible helpers Accessible* ActionWalk(bool* aIsLink = nullptr, bool* aIsOnclick = nullptr, bool* aIsLabelWithControl = nullptr); // HyperLinkAccessible virtual already_AddRefed<nsIURI> AnchorURIAt(uint32_t aAnchorIndex) override; protected: virtual ~LinkableAccessible() {} }; /** * A simple accessible that gets its enumerated role. */ template<a11y::role R> class EnumRoleAccessible : public AccessibleWrap { public: EnumRoleAccessible(nsIContent* aContent, DocAccessible* aDoc) : AccessibleWrap(aContent, aDoc) { } NS_IMETHOD QueryInterface(REFNSIID aIID, void** aPtr) override { return Accessible::QueryInterface(aIID, aPtr); } // Accessible virtual a11y::role NativeRole() override { return R; } protected: virtual ~EnumRoleAccessible() { } }; /** * A wrapper accessible around native accessible to connect it with * crossplatform accessible tree. */ class DummyAccessible : public AccessibleWrap { public: explicit DummyAccessible(DocAccessible* aDocument = nullptr) : AccessibleWrap(nullptr, aDocument) { } virtual uint64_t NativeState() override final; virtual uint64_t NativeInteractiveState() const override final; virtual uint64_t NativeLinkState() const override final; virtual bool NativelyUnavailable() const override final; virtual void ApplyARIAState(uint64_t* aState) const override final; protected: virtual ~DummyAccessible() { } }; } // namespace a11y } // namespace mozilla #endif