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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* container for information saved in session history when the document
* is not
*/
#include "nsILayoutHistoryState.h"
#include "nsWeakReference.h"
#include "nsClassHashtable.h"
#include "nsPresState.h"
#include "mozilla/Attributes.h"
class nsLayoutHistoryState MOZ_FINAL : public nsILayoutHistoryState,
public nsSupportsWeakReference
{
public:
NS_HIDDEN_(nsresult) Init();
NS_DECL_ISUPPORTS
// nsILayoutHistoryState
NS_IMETHOD AddState(const nsCString& aKey, nsPresState* aState);
NS_IMETHOD GetState(const nsCString& aKey, nsPresState** aState);
NS_IMETHOD RemoveState(const nsCString& aKey);
NS_IMETHOD_(bool) HasStates() const;
NS_IMETHOD SetScrollPositionOnly(const bool aFlag);
private:
~nsLayoutHistoryState() {}
bool mScrollPositionOnly;
nsClassHashtable<nsCStringHashKey,nsPresState> mStates;
};
nsresult
NS_NewLayoutHistoryState(nsILayoutHistoryState** aState)
{
nsLayoutHistoryState *state;
*aState = nullptr;
state = new nsLayoutHistoryState();
NS_ADDREF(state);
nsresult rv = state->Init();
if (NS_SUCCEEDED(rv))
*aState = state;
else
NS_RELEASE(state);
return rv;
}
NS_IMPL_ISUPPORTS2(nsLayoutHistoryState,
nsILayoutHistoryState,
nsISupportsWeakReference)
nsresult
nsLayoutHistoryState::Init()
{
mScrollPositionOnly = false;
mStates.Init();
return NS_OK;
}
NS_IMETHODIMP
nsLayoutHistoryState::AddState(const nsCString& aStateKey, nsPresState* aState)
{
mStates.Put(aStateKey, aState);
return NS_OK;
}
NS_IMETHODIMP
nsLayoutHistoryState::GetState(const nsCString& aKey, nsPresState** aState)
{
bool entryExists = mStates.Get(aKey, aState);
if (entryExists && mScrollPositionOnly) {
// Ensure any state that shouldn't be restored is removed
(*aState)->ClearNonScrollState();
}
return NS_OK;
}
NS_IMETHODIMP
nsLayoutHistoryState::RemoveState(const nsCString& aKey)
{
mStates.Remove(aKey);
return NS_OK;
}
NS_IMETHODIMP_(bool)
nsLayoutHistoryState::HasStates() const
{
return mStates.Count() != 0;
}
NS_IMETHODIMP
nsLayoutHistoryState::SetScrollPositionOnly(const bool aFlag)
{
mScrollPositionOnly = aFlag;
return NS_OK;
}
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