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- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** 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/
- *
- * 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
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 2003
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Original Author: Aaron Leventhal (aaronl@netscape.com)
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- /* For documentation of the accessibility architecture,
- * see http://lxr.mozilla.org/seamonkey/source/accessible/accessible-docs.html
- */
-
- #ifndef _nsAccessNode_H_
- #define _nsAccessNode_H_
-
- #include "nsCOMPtr.h"
- #include "nsIAccessNode.h"
- #include "nsPIAccessNode.h"
- #include "nsIDocShellTreeItem.h"
- #include "nsIDOMNode.h"
- #include "nsIStringBundle.h"
- #include "nsWeakReference.h"
- #include "nsInterfaceHashtable.h"
-
- class nsIPresShell;
- class nsPresContext;
- class nsIAccessibleDocument;
- class nsIFrame;
- class nsIDOMNodeList;
- class nsITimer;
-
- enum { eChildCountUninitialized = 0xffff };
-
- #define ACCESSIBLE_BUNDLE_URL "chrome://global-platform/locale/accessible.properties"
- #define PLATFORM_KEYS_BUNDLE_URL "chrome://global-platform/locale/platformKeys.properties"
-
- /* hashkey wrapper using void* KeyType
- *
- * @see nsTHashtable::EntryType for specification
- */
- class nsVoidHashKey : public PLDHashEntryHdr
- {
- public:
- typedef const void* KeyType;
- typedef const void* KeyTypePointer;
-
- nsVoidHashKey(KeyTypePointer aKey) : mValue(aKey) { }
- nsVoidHashKey(const nsVoidHashKey& toCopy) : mValue(toCopy.mValue) { }
- ~nsVoidHashKey() { }
-
- KeyType GetKey() const { return mValue; }
- KeyTypePointer GetKeyPointer() const { return mValue; }
- PRBool KeyEquals(KeyTypePointer aKey) const { return aKey == mValue; }
-
- static KeyTypePointer KeyToPointer(KeyType aKey) { return aKey; }
- static PLDHashNumber HashKey(KeyTypePointer aKey) { return NS_PTR_TO_INT32(aKey) >> 2; }
- enum { ALLOW_MEMMOVE = PR_TRUE };
-
- private:
- const void* mValue;
- };
-
- class nsAccessNode: public nsIAccessNode, public nsPIAccessNode
- {
- public: // construction, destruction
- nsAccessNode(nsIDOMNode *, nsIWeakReference* aShell);
- virtual ~nsAccessNode();
-
- NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
- NS_IMETHOD_(nsrefcnt) AddRef(void);
- NS_IMETHOD_(nsrefcnt) Release(void);
- NS_DECL_NSIACCESSNODE
- NS_DECL_NSPIACCESSNODE
-
- static void InitXPAccessibility();
- static void ShutdownXPAccessibility();
-
- // Static methods for handling per-document cache
- static void PutCacheEntry(nsInterfaceHashtable<nsVoidHashKey, nsIAccessNode>& aCache,
- void* aUniqueID, nsIAccessNode *aAccessNode);
- static void GetCacheEntry(nsInterfaceHashtable<nsVoidHashKey, nsIAccessNode>& aCache, void* aUniqueID,
- nsIAccessNode **aAccessNode);
- static void ClearCache(nsInterfaceHashtable<nsVoidHashKey, nsIAccessNode>& aCache);
-
- static PLDHashOperator PR_CALLBACK ClearCacheEntry(const void* aKey, nsCOMPtr<nsIAccessNode>& aAccessNode, void* aUserArg);
-
- // Static cache methods for global document cache
- static already_AddRefed<nsIAccessibleDocument> GetDocAccessibleFor(nsIWeakReference *aPresShell);
- static already_AddRefed<nsIAccessibleDocument> GetDocAccessibleFor(nsISupports *aContainer);
- static already_AddRefed<nsIAccessibleDocument> GetDocAccessibleFor(nsIDOMNode *aNode);
-
- static already_AddRefed<nsIDocShellTreeItem> GetDocShellTreeItemFor(nsIDOMNode *aStartNode);
- static already_AddRefed<nsIPresShell> GetPresShellFor(nsIDOMNode *aStartNode);
-
- static nsIDOMNode *gLastFocusedNode;
-
- protected:
- nsresult MakeAccessNode(nsIDOMNode *aNode, nsIAccessNode **aAccessNode);
- already_AddRefed<nsIPresShell> GetPresShell();
- nsPresContext* GetPresContext();
- already_AddRefed<nsIAccessibleDocument> GetDocAccessible();
-
- nsCOMPtr<nsIDOMNode> mDOMNode;
- nsCOMPtr<nsIWeakReference> mWeakShell;
-
- PRInt16 mRefCnt;
- PRUint16 mAccChildCount;
- NS_DECL_OWNINGTHREAD
-
- #ifdef DEBUG
- PRBool mIsInitialized;
- #endif
-
- // Static data, we do our own refcounting for our static data
- static nsIStringBundle *gStringBundle;
- static nsIStringBundle *gKeyStringBundle;
- static nsITimer *gDoCommandTimer;
- static PRBool gIsAccessibilityActive;
- static PRBool gIsCacheDisabled;
-
- static nsInterfaceHashtable<nsVoidHashKey, nsIAccessNode> gGlobalDocAccessibleCache;
- };
-
- #endif
-
-