accessible/src/base/nsRootAccessible.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is mozilla.org code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either of the GNU General Public License Version 2 or later (the "GPL"),
  26  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
  29  * under the terms of either the GPL or the LGPL, and not to allow others to
  30  * use your version of this file under the terms of the MPL, indicate your
  31  * decision by deleting the provisions above and replace them with the notice
  32  * and other provisions required by the GPL or the LGPL. If you do not delete
  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #ifndef _nsRootAccessible_H_
  39 #define _nsRootAccessible_H_
  40
  41 #include "nsDocAccessibleWrap.h"
  42 #include "nsHashtable.h"
  43 #include "nsIAccessibleDocument.h"
  44 #include "nsCaretAccessible.h"
  45 #include "nsIDocument.h"
  46 #include "nsIDOMFocusListener.h"
  47 #include "nsIDOMFormListener.h"
  48 #include "nsIDOMXULListener.h"
  49 #include "nsITimer.h"
  50
  51 #define NS_ROOTACCESSIBLE_IMPL_CID                      \
  52 {  /* 7565f0d1-1465-4b71-906c-a623ac279f5d */           \
  53   0x7565f0d1,                                           \
  54   0x1465,                                               \
  55   0x4b71,                                               \
  56   { 0x90, 0x6c, 0xa6, 0x23, 0xac, 0x27, 0x9f, 0x5d }    \
  57 }
  58
  59 const PRInt32 SCROLL_HASH_START_SIZE = 6;
  60
  61 class nsRootAccessible : public nsDocAccessibleWrap,
  62                          public nsIDOMEventListener
  63 {
  64   NS_DECL_ISUPPORTS_INHERITED
  65
  66   public:
  67     nsRootAccessible(nsIDOMNode *aDOMNode, nsIWeakReference* aShell);
  68     virtual ~nsRootAccessible();
  69
  70     // nsIAccessible
  71     NS_IMETHOD GetName(nsAString& aName);
  72     NS_IMETHOD GetParent(nsIAccessible * *aParent);
  73     NS_IMETHOD GetRole(PRUint32 *aRole);
  74     NS_IMETHOD GetState(PRUint32 *aState, PRUint32 *aExtraState);
  75     NS_IMETHOD GetAccessibleRelated(PRUint32 aRelationType,
  76                                     nsIAccessible **aRelated);
  77
  78     // ----- nsPIAccessibleDocument -----------------------
  79     NS_IMETHOD FireDocLoadEvents(PRUint32 aEventType);
  80
  81     // ----- nsIDOMEventListener --------------------------
  82     NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
  83
  84     // nsIAccessNode
  85     NS_IMETHOD Init();
  86     NS_IMETHOD Shutdown();
  87
  88     void ShutdownAll();
  89
  90     NS_DECLARE_STATIC_IID_ACCESSOR(NS_ROOTACCESSIBLE_IMPL_CID)
  91
  92     /**
  93       * Fire an accessible focus event for the current focusAccssible
  94       * and attach a new selection listener, if necessary.
  95       * @param aFocusAccessible  The accessible which has received focus.
  96       * @param aFocusNode        The DOM Node which has received focus.
  97       * @param aFocusEvent       DOM focus event that caused the node/accessible to receive focus
  98       * @param aForceEvent       Fire a focus event even if the last focused item was the same
  99       * @return                  Boolean -- was a focus event actually fired
 100       */
 101     PRBool FireAccessibleFocusEvent(nsIAccessible *aFocusAccessible,
 102                                     nsIDOMNode *aFocusNode,
 103                                     nsIDOMEvent *aFocusEvent,
 104                                     PRBool aForceEvent = PR_FALSE,
 105                                     PRBool aIsAsynch = PR_FALSE);
 106
 107     nsCaretAccessible *GetCaretAccessible();
 108
 109   private:
 110     nsCOMPtr<nsITimer> mFireFocusTimer;
 111     static void FireFocusCallback(nsITimer *aTimer, void *aClosure);
 112
 113   protected:
 114     nsresult AddEventListeners();
 115     nsresult RemoveEventListeners();
 116     nsresult HandleEventWithTarget(nsIDOMEvent* aEvent,
 117                                    nsIDOMNode* aTargetNode);
 118     static void GetTargetNode(nsIDOMEvent *aEvent, nsIDOMNode **aTargetNode);
 119     void TryFireEarlyLoadEvent(nsIDOMNode *aDocNode);
 120     void FireCurrentFocusEvent();
 121     void GetChromeEventHandler(nsIDOMEventTarget **aChromeTarget);
 122
 123     /**
 124      * Handles 'TreeRowCountChanged' event. Used in HandleEventWithTarget().
 125      */
 126     nsresult HandleTreeRowCountChangedEvent(nsIDOMEvent *aEvent,
 127                                             nsIAccessible *aAccessible,
 128                                             const nsAString& aTargetName);
 129
 130     /**
 131      * Handles 'TreeInvalidated' event. Used in HandleEventWithTarget().
 132      */
 133     nsresult HandleTreeInvalidatedEvent(nsIDOMEvent *aEvent,
 134                                         nsIAccessible *aAccessible,
 135                                         const nsAString& aTargetName);
 136
 137 #ifdef MOZ_XUL
 138     PRUint32 GetChromeFlags();
 139 #endif
 140     already_AddRefed<nsIDocShellTreeItem>
 141            GetContentDocShell(nsIDocShellTreeItem *aStart);
 142     nsRefPtr<nsCaretAccessible> mCaretAccessible;
 143     nsCOMPtr<nsIDOMNode> mCurrentARIAMenubar;
 144 };
 145
 146 NS_DEFINE_STATIC_IID_ACCESSOR(nsRootAccessible, NS_ROOTACCESSIBLE_IMPL_CID)
 147
 148 #endif