mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-15 03:00:30 +00:00
150 lines
4.0 KiB
C++
150 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape 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/NPL/
|
|
*
|
|
* 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 Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
#include "nsILayoutHistoryState.h"
|
|
#include "nsHashtable.h"
|
|
#include "nsIStatefulFrame.h" // Get StateType enum
|
|
|
|
MOZ_DECL_CTOR_COUNTER(HistoryKey);
|
|
|
|
class HistoryKey: public nsHashKey {
|
|
private:
|
|
PRUint32 itsHash;
|
|
|
|
public:
|
|
HistoryKey(PRUint32 aContentID, nsIStatefulFrame::StateType aStateType) {
|
|
MOZ_COUNT_CTOR(HistoryKey);
|
|
itsHash = aContentID * nsIStatefulFrame::eNumStateTypes + aStateType;
|
|
}
|
|
|
|
HistoryKey(PRUint32 aKey) {
|
|
MOZ_COUNT_CTOR(HistoryKey);
|
|
itsHash = aKey;
|
|
}
|
|
~HistoryKey() {
|
|
MOZ_COUNT_DTOR(HistoryKey);
|
|
}
|
|
|
|
PRUint32 HashValue(void) const {
|
|
return itsHash;
|
|
}
|
|
|
|
PRBool Equals(const nsHashKey *aKey) const {
|
|
return (itsHash == (((const HistoryKey *) aKey)->HashValue())) ? PR_TRUE : PR_FALSE;
|
|
}
|
|
|
|
nsHashKey *Clone(void) const {
|
|
return new HistoryKey(itsHash);
|
|
}
|
|
};
|
|
|
|
class nsLayoutHistoryState : public nsILayoutHistoryState
|
|
{
|
|
public:
|
|
nsLayoutHistoryState();
|
|
virtual ~nsLayoutHistoryState();
|
|
|
|
NS_DECL_ISUPPORTS
|
|
|
|
// nsILayoutHistoryState
|
|
NS_IMETHOD AddState(PRUint32 aContentID,
|
|
nsISupports* aState,
|
|
nsIStatefulFrame::StateType aStateType = nsIStatefulFrame::eNoType);
|
|
NS_IMETHOD GetState(PRUint32 aContentID,
|
|
nsISupports** aState,
|
|
nsIStatefulFrame::StateType aStateType = nsIStatefulFrame::eNoType);
|
|
|
|
private:
|
|
nsSupportsHashtable mStates;
|
|
};
|
|
|
|
|
|
nsresult
|
|
NS_NewLayoutHistoryState(nsILayoutHistoryState** aState)
|
|
{
|
|
NS_PRECONDITION(aState != nsnull, "null ptr");
|
|
if (! aState)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
*aState = new nsLayoutHistoryState();
|
|
if (! *aState)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
NS_ADDREF(*aState);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsLayoutHistoryState::nsLayoutHistoryState()
|
|
{
|
|
NS_INIT_REFCNT();
|
|
}
|
|
|
|
nsLayoutHistoryState::~nsLayoutHistoryState()
|
|
{
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsLayoutHistoryState,
|
|
nsILayoutHistoryState::GetIID());
|
|
|
|
NS_IMETHODIMP
|
|
nsLayoutHistoryState::AddState(PRUint32 aContentID,
|
|
nsISupports* aState,
|
|
nsIStatefulFrame::StateType aStateType)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
HistoryKey key(aContentID, aStateType);
|
|
void * res = mStates.Put(&key, (void *) aState);
|
|
/* nsHashTable seems to return null when it actually added
|
|
* the element in to the table. If another element was already
|
|
* present in the table for the key, it seems to return the
|
|
* element that was already present. Not sure if that was
|
|
* the intended behavior
|
|
*/
|
|
if (res) {
|
|
printf("nsLayoutHistoryState::AddState OOPS!. There was already a state in the hash table for the key\n");
|
|
rv = NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsLayoutHistoryState::GetState(PRUint32 aContentID,
|
|
nsISupports** aState,
|
|
nsIStatefulFrame::StateType aStateType)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
HistoryKey key(aContentID, aStateType);
|
|
void * state = nsnull;
|
|
state = mStates.Get(&key);
|
|
if (state) {
|
|
*aState = (nsISupports *)state;
|
|
}
|
|
else {
|
|
printf("nsLayoutHistoryState::GetState, ERROR getting History state for the key\n");
|
|
*aState = nsnull;
|
|
rv = NS_ERROR_NULL_POINTER;
|
|
}
|
|
return rv;
|
|
}
|