gecko/accessible/src/generic/ApplicationAccessible.h

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
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 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Bolian Yin <bolian.yin@sun.com>
 *   Ginn Chen <ginn.chen@sun.com>
 *   Alexander Surkov <surkov.alexander@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
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#ifndef mozilla_a11y_ApplicationAccessible_h__
#define mozilla_a11y_ApplicationAccessible_h__

#include "nsAccessibleWrap.h"
#include "nsIAccessibleApplication.h"

#include "nsIMutableArray.h"
#include "nsIXULAppInfo.h"

namespace mozilla {
namespace a11y {
 
/**
 * ApplicationAccessible is for the whole application of Mozilla.
 * Only one instance of ApplicationAccessible exists for one Mozilla instance.
 * And this one should be created when Mozilla Startup (if accessibility
 * feature has been enabled) and destroyed when Mozilla Shutdown.
 *
 * All the accessibility objects for toplevel windows are direct children of
 * the ApplicationAccessible instance.
 */

class ApplicationAccessible: public nsAccessibleWrap,
                             public nsIAccessibleApplication
{
public:

  ApplicationAccessible();

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIAccessible
  NS_SCRIPTABLE NS_IMETHOD GetDOMNode(nsIDOMNode** aDOMNode);
  NS_SCRIPTABLE NS_IMETHOD GetDocument(nsIAccessibleDocument** aDocument);
  NS_SCRIPTABLE NS_IMETHOD GetRootDocument(nsIAccessibleDocument** aRootDocument);
  NS_SCRIPTABLE NS_IMETHOD ScrollTo(PRUint32 aScrollType);
  NS_SCRIPTABLE NS_IMETHOD ScrollToPoint(PRUint32 aCoordinateType, PRInt32 aX, PRInt32 aY);
  NS_SCRIPTABLE NS_IMETHOD GetLanguage(nsAString& aLanguage);
  NS_IMETHOD GetParent(nsIAccessible **aParent);
  NS_IMETHOD GetNextSibling(nsIAccessible **aNextSibling);
  NS_IMETHOD GetPreviousSibling(nsIAccessible **aPreviousSibling);
  NS_IMETHOD GetAttributes(nsIPersistentProperties **aAttributes);
  NS_IMETHOD GroupPosition(PRInt32 *aGroupLevel, PRInt32 *aSimilarItemsInGroup,
                           PRInt32 *aPositionInGroup);
  NS_IMETHOD GetBounds(PRInt32 *aX, PRInt32 *aY,
                       PRInt32 *aWidth, PRInt32 *aHeight);
  NS_IMETHOD SetSelected(bool aIsSelected);
  NS_IMETHOD TakeSelection();
  NS_IMETHOD TakeFocus();
  NS_IMETHOD GetActionName(PRUint8 aIndex, nsAString &aName);
  NS_IMETHOD GetActionDescription(PRUint8 aIndex, nsAString &aDescription);
  NS_IMETHOD DoAction(PRUint8 aIndex);

  // nsIAccessibleApplication
  NS_DECL_NSIACCESSIBLEAPPLICATION

  // nsAccessNode
  virtual bool Init();
  virtual void Shutdown();
  virtual bool IsPrimaryForNode() const;

  // nsAccessible
  virtual mozilla::a11y::ENameValueFlag Name(nsString& aName);
  virtual void ApplyARIAState(PRUint64* aState) const;
  virtual void Description(nsString& aDescription);
  virtual void Value(nsString& aValue);
  virtual mozilla::a11y::role NativeRole();
  virtual PRUint64 State();
  virtual PRUint64 NativeState();
  virtual Relation RelationByType(PRUint32 aRelType);

  virtual nsAccessible* ChildAtPoint(PRInt32 aX, PRInt32 aY,
                                     EWhichChildAtPoint aWhichChild);
  virtual nsAccessible* FocusedChild();

  virtual void InvalidateChildren();

  // ActionAccessible
  virtual PRUint8 ActionCount();
  virtual KeyBinding AccessKey() const;

protected:

  // nsAccessible
  virtual void CacheChildren();
  virtual nsAccessible* GetSiblingAtOffset(PRInt32 aOffset,
                                           nsresult *aError = nsnull) const;

private:
  nsCOMPtr<nsIXULAppInfo> mAppInfo;
};

} // namespace a11y
} // namespace mozilla

#endif