mirror of
https://github.com/mozilla/gecko-dev.git
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145 lines
4.1 KiB
C++
145 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsILayoutHistoryState.h"
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#include "nsWeakReference.h"
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#include "nsHashtable.h"
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class nsLayoutHistoryState : public nsILayoutHistoryState,
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public nsSupportsWeakReference
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{
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public:
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nsLayoutHistoryState();
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virtual ~nsLayoutHistoryState();
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NS_DECL_ISUPPORTS
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// nsILayoutHistoryState
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NS_IMETHOD AddState(const nsCString& aKey, nsIPresState* aState);
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NS_IMETHOD GetState(const nsCString& aKey, nsIPresState** aState);
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NS_IMETHOD RemoveState(const nsCString& aKey);
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private:
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nsSupportsHashtable mStates;
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};
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nsresult
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NS_NewLayoutHistoryState(nsILayoutHistoryState** aState)
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{
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NS_ENSURE_ARG_POINTER(aState);
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if (! aState)
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return NS_ERROR_NULL_POINTER;
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nsLayoutHistoryState *state = new nsLayoutHistoryState();
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if (!state)
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return NS_ERROR_OUT_OF_MEMORY;
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*aState = NS_STATIC_CAST(nsILayoutHistoryState *, state);
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NS_ADDREF(*aState);
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return NS_OK;
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}
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nsLayoutHistoryState::nsLayoutHistoryState()
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{
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}
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nsLayoutHistoryState::~nsLayoutHistoryState()
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{
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}
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NS_IMPL_ISUPPORTS2(nsLayoutHistoryState,
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nsILayoutHistoryState,
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nsISupportsWeakReference)
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NS_IMETHODIMP
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nsLayoutHistoryState::AddState(const nsCString& aStateKey,
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nsIPresState* aState)
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{
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nsCStringKey key(aStateKey);
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/*
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* nsSupportsHashtable::Put() returns false when no object was
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* replaced when inserting the new one, true if one was.
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*/
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#ifdef DEBUG_pollmann
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PRBool replaced =
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#endif
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mStates.Put (&key, aState);
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#ifdef DEBUG_pollmann
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NS_ASSERTION(!replaced,
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"nsLayoutHistoryState::AddState OOPS!. There was already a state in the hash table for the key\n");
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#endif
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return NS_OK;
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}
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NS_IMETHODIMP
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nsLayoutHistoryState::GetState(const nsCString& aKey,
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nsIPresState** aState)
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{
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nsresult rv = NS_OK;
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nsCStringKey key(aKey);
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nsISupports *state = nsnull;
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state = mStates.Get(&key);
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if (state) {
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*aState = (nsIPresState *)state;
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}
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else {
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#if 0
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printf("nsLayoutHistoryState::GetState, ERROR getting History state for the key\n");
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#endif
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*aState = nsnull;
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rv = NS_OK;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsLayoutHistoryState::RemoveState(const nsCString& aKey)
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{
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nsresult rv = NS_OK;
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nsCStringKey key(aKey);
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mStates.Remove(&key);
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return rv;
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}
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