gecko-dev/accessible/src/xul/nsXULSelectAccessible.h

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 * The Original Code is mozilla.org code.
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 * Contributor(s):
 * Original Author: Eric Vaughan (evaughan@netscape.com)
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#ifndef __nsXULSelectAccessible_h__
#define __nsXULSelectAccessible_h__

#include "nsCOMPtr.h"
#include "nsIAccessibleSelectable.h"
#include "nsIDOMNode.h"
#include "nsIWeakReference.h"
#include "nsSelectAccessible.h"
#include "nsXULMenuAccessible.h"

/**
  * Selects, Listboxes and Comboboxes, are made up of a number of different
  *  widgets, some of which are shared between the two. This file contains 
  *  all of the widgets for both of the Selects, for XUL only. Some of them
  *  extend classes from nsSelectAccessible.cpp, which contains base classes 
  *  that are also extended by the XUL Select Accessibility support.
  *
  *  Listbox:
  *     - nsXULListboxAccessible
  *        - nsXULSelectListAccessible
  *           - nsXULSelectOptionAccessible
  *
  *  Comboboxes:
  *     - nsXULComboboxAccessible      <menulist />
  *        - nsHTMLTextFieldAccessible
  *        - nsXULComboboxButtonAccessible    
  *         - nsXULSelectListAccessible      <menupopup />
  *            - nsXULSelectOptionAccessible(s)   <menuitem />
  */

/** ------------------------------------------------------ */
/**  First, the common widgets                             */
/** ------------------------------------------------------ */

/*
 * The list that contains all the options in the select.
 */
class nsXULSelectListAccessible : public nsAccessible
{
public:
  
  nsXULSelectListAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell);
  virtual ~nsXULSelectListAccessible() {}

  /* ----- nsIAccessible ----- */
  NS_IMETHOD GetAccRole(PRUint32 *_retval);
  NS_IMETHOD GetAccState(PRUint32 *_retval);
};

/*
 * Options inside the select, contained within the list
 */
class nsXULSelectOptionAccessible : public nsXULMenuitemAccessible
{
public:
  
  nsXULSelectOptionAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell);
  virtual ~nsXULSelectOptionAccessible() {}

  /* ----- nsIAccessible ----- */
  NS_IMETHOD GetAccRole(PRUint32 *_retval);
  NS_IMETHOD GetAccState(PRUint32 *_retval);

  static nsresult GetFocusedOptionNode(nsIWeakReference *aPresShell, nsIDOMNode *aListNode, nsCOMPtr<nsIDOMNode>& aFocusedOptionNode);
};

/** ------------------------------------------------------ */
/**  Secondly, the Listbox widget                          */
/** ------------------------------------------------------ */

/*
 * A class the represents the XUL Listbox widget.
 */
class nsXULListboxAccessible : public nsListboxAccessible,
                               public nsIAccessibleSelectable  
{
public:

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_NSIACCESSIBLESELECTABLE
  
  nsXULListboxAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell);
  virtual ~nsXULListboxAccessible() {}

  /* ----- nsIAccessible ----- */
  NS_IMETHOD GetAccValue(nsAWritableString& _retval);

};

/** ------------------------------------------------------ */
/**  Finally, the Combobox widgets                         */
/** ------------------------------------------------------ */

/*
 * A class the represents the XUL Combobox widget.
 */
class nsXULComboboxAccessible : public nsComboboxAccessible
{
public:

  nsXULComboboxAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell);
  virtual ~nsXULComboboxAccessible() {}

  /* ----- nsIAccessible ----- */
  NS_IMETHOD GetAccValue(nsAWritableString& _retval);
};

#endif