зеркало из https://github.com/mozilla/gecko-dev.git
137 строки
3.5 KiB
C++
137 строки
3.5 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);
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virtual bool InsertChildAt(uint32_t aIndex, Accessible* aChild) MOZ_OVERRIDE MOZ_FINAL;
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virtual bool RemoveChild(Accessible* aChild) MOZ_OVERRIDE MOZ_FINAL;
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protected:
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virtual ~LeafAccessible() {}
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// Accessible
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virtual void CacheChildren();
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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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NS_DECL_ISUPPORTS_INHERITED
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// nsIAccessible
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NS_IMETHOD GetActionName(uint8_t aIndex, nsAString& aName);
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NS_IMETHOD DoAction(uint8_t index);
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NS_IMETHOD TakeFocus();
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// Accessible
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virtual void Shutdown();
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virtual void Value(nsString& aValue);
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virtual uint64_t NativeLinkState() const;
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// ActionAccessible
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virtual uint8_t ActionCount();
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virtual KeyBinding AccessKey() const;
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// HyperLinkAccessible
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virtual already_AddRefed<nsIURI> AnchorURIAt(uint32_t aAnchorIndex);
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protected:
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virtual ~LinkableAccessible() {}
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// Accessible
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virtual void BindToParent(Accessible* aParent, uint32_t aIndexInParent);
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virtual void UnbindFromParent();
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/**
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* Parent accessible that provides an action for this linkable accessible.
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*/
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Accessible* mActionAcc;
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bool mIsLink;
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bool mIsOnclick;
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};
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/**
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* A simple accessible that gets its enumerated role passed into constructor.
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*/
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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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a11y::role aRole);
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NS_DECL_ISUPPORTS_INHERITED
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// Accessible
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virtual a11y::role NativeRole();
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protected:
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virtual ~EnumRoleAccessible() { }
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a11y::role mRole;
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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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DummyAccessible() : AccessibleWrap(nullptr, nullptr) { }
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virtual ~DummyAccessible() { }
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virtual uint64_t NativeState() MOZ_OVERRIDE MOZ_FINAL;
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virtual uint64_t NativeInteractiveState() const MOZ_OVERRIDE MOZ_FINAL;
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virtual uint64_t NativeLinkState() const MOZ_OVERRIDE MOZ_FINAL;
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virtual bool NativelyUnavailable() const MOZ_OVERRIDE MOZ_FINAL;
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virtual void ApplyARIAState(uint64_t* aState) const MOZ_OVERRIDE MOZ_FINAL;
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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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