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/* -*- 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
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