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nsAccessibleEventData.h

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 * The contents of this file are subject to the Mozilla Public License Version
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Kyle Yuan (kyle.yuan@sun.com)
 *   John Sun (john.sun@sun.com)
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef _nsAccessibleEventData_H_
#define _nsAccessibleEventData_H_

#include "nsCOMPtr.h"
#include "nsIAccessibleEvent.h"
#include "nsIAccessible.h"
#include "nsIAccessibleDocument.h"
#include "nsIDOMNode.h"

class nsAccessibleEventData: public nsIAccessibleEvent
{
  public:
    // Initialize with an nsIAccessible
    nsAccessibleEventData(PRUint32 aEventType, nsIAccessible *aAccessible, 
                          nsIAccessibleDocument *aDocAccessible, 
                          void *aEventData);
    // Initialize with an nsIDOMNode
    nsAccessibleEventData(PRUint32 aEventType, nsIDOMNode *aDOMNode,
                          nsIAccessibleDocument *aDocAccessible,
                          void *aEventData);
    virtual ~nsAccessibleEventData() {};

    NS_DECL_ISUPPORTS

    //nsIAccessibleEvent
    NS_IMETHOD GetEventType(PRUint32 *aEventType) {*aEventType = mEventType; return NS_OK;}
    NS_IMETHOD GetAccessible(nsIAccessible **aAccessible);
    NS_IMETHOD GetAccessibleDocument(nsIAccessibleDocument **aDocAccessible) 
      {NS_ADDREF(*aDocAccessible = mDocAccessible); return NS_OK;}
    NS_IMETHOD GetDOMNode(nsIDOMNode **aDOMNode);

  private:
    PRUint32 mEventType;
    nsCOMPtr<nsIAccessible> mAccessible;
    nsCOMPtr<nsIDOMNode> mDOMNode;
    nsCOMPtr<nsIAccessibleDocument> mDocAccessible;
    void *mEventData;
};

// XXX todo: We might want to use XPCOM interfaces instead of structs
//     e.g., nsAccessibleTextChangeEvent: public nsIAccessibleTextChangeEvent
//           

struct AtkStateChange {
  PRUint32 state;
  PRUint32 extState;
  PRBool   enable;
  AtkStateChange() {
    state = 0;
    extState = 0;
    enable = PR_FALSE;
  }
};

enum AtkProperty {
  PROP_0,           // gobject convention
  PROP_NAME,
  PROP_DESCRIPTION,
  PROP_PARENT,      // ancestry has changed
  PROP_VALUE,
  PROP_ROLE,
  PROP_LAYER,
  PROP_MDI_ZORDER,
  PROP_TABLE_CAPTION,
  PROP_TABLE_COLUMN_DESCRIPTION,
  PROP_TABLE_COLUMN_HEADER,
  PROP_TABLE_ROW_DESCRIPTION,
  PROP_TABLE_ROW_HEADER,
  PROP_TABLE_SUMMARY,
  PROP_LAST         // gobject convention
};

struct AtkPropertyChange {
  PRInt32 type;     // property type as listed above 
  void *oldvalue;  
  void *newvalue;
};

struct AtkChildrenChange {
  PRInt32      index;  // index of child in parent 
  nsIAccessible *child;   
  PRBool        add;    // true for add, false for delete
};

struct AtkTextChange {
  PRInt32  start;
  PRUint32 length;
  PRBool   add;     // true for add, false for delete
};

struct AtkTableChange {
  PRUint32 index;   // the start row/column after which the rows are inserted/deleted.
  PRUint32 count;   // the number of inserted/deleted rows/columns
};

#endif  

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