133 lines
3.7 KiB
C++
133 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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 mozilla_a11y_BaseAccessibles_h__
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#define mozilla_a11y_BaseAccessibles_h__
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#include "AccessibleWrap.h"
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#include "HyperTextAccessibleWrap.h"
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class nsIContent;
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/**
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* This file contains a number of classes that are used as base
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* classes for the different accessibility implementations of
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* the HTML and XUL widget sets. --jgaunt
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*/
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namespace mozilla {
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namespace a11y {
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/**
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* Leaf version of DOM Accessible -- has no children
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*/
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class LeafAccessible : public AccessibleWrap
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{
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public:
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LeafAccessible(nsIContent* aContent, DocAccessible* aDoc);
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// nsISupports
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NS_DECL_ISUPPORTS_INHERITED
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// Accessible
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virtual Accessible* ChildAtPoint(int32_t aX, int32_t aY,
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EWhichChildAtPoint aWhichChild) override;
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virtual bool InsertChildAt(uint32_t aIndex, Accessible* aChild) override final;
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virtual bool RemoveChild(Accessible* aChild) override final;
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virtual bool IsAcceptableChild(nsIContent* aEl) const override;
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protected:
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virtual ~LeafAccessible() {}
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};
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/**
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* Used for text or image accessible nodes contained by link accessibles or
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* accessibles for nodes with registered click event handler. It knows how to
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* report the state of the host link (traveled or not) and can activate (click)
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* the host accessible programmatically.
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*/
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class LinkableAccessible : public AccessibleWrap
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{
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public:
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enum { eAction_Jump = 0 };
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LinkableAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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AccessibleWrap(aContent, aDoc)
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{
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}
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NS_DECL_ISUPPORTS_INHERITED
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// Accessible
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virtual void Value(nsString& aValue) override;
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virtual uint64_t NativeLinkState() const override;
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virtual void TakeFocus() override;
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// ActionAccessible
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virtual uint8_t ActionCount() override;
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virtual void ActionNameAt(uint8_t aIndex, nsAString& aName) override;
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virtual bool DoAction(uint8_t index) override;
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virtual KeyBinding AccessKey() const override;
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// ActionAccessible helpers
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Accessible* ActionWalk(bool* aIsLink = nullptr,
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bool* aIsOnclick = nullptr,
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bool* aIsLabelWithControl = nullptr);
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// HyperLinkAccessible
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virtual already_AddRefed<nsIURI> AnchorURIAt(uint32_t aAnchorIndex) override;
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protected:
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virtual ~LinkableAccessible() {}
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};
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/**
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* A simple accessible that gets its enumerated role.
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*/
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template<a11y::role R>
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class EnumRoleAccessible : public AccessibleWrap
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{
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public:
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EnumRoleAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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AccessibleWrap(aContent, aDoc) { }
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aPtr) override
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{ return Accessible::QueryInterface(aIID, aPtr); }
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// Accessible
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virtual a11y::role NativeRole() override { return R; }
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protected:
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virtual ~EnumRoleAccessible() { }
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};
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/**
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* A wrapper accessible around native accessible to connect it with
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* crossplatform accessible tree.
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*/
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class DummyAccessible : public AccessibleWrap
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{
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public:
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explicit DummyAccessible(DocAccessible* aDocument = nullptr) :
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AccessibleWrap(nullptr, aDocument) { }
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virtual uint64_t NativeState() override final;
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virtual uint64_t NativeInteractiveState() const override final;
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virtual uint64_t NativeLinkState() const override final;
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virtual bool NativelyUnavailable() const override final;
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virtual void ApplyARIAState(uint64_t* aState) const override final;
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protected:
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virtual ~DummyAccessible() { }
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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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