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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/. */
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISupportsUtils.h"
#include "nsTransactionItem.h"
#include "nsTransactionStack.h"
#include "nscore.h"
class nsTransactionStackDeallocator : public nsDequeFunctor {
virtual void* operator() (void* aObject) {
RefPtr<nsTransactionItem> releaseMe = dont_AddRef(static_cast<nsTransactionItem*>(aObject));
return nullptr;
}
};
nsTransactionStack::nsTransactionStack(Type aType)
: nsDeque(new nsTransactionStackDeallocator())
, mType(aType)
{
}
nsTransactionStack::~nsTransactionStack()
{
Clear();
}
void
nsTransactionStack::Push(nsTransactionItem* aTransactionItem)
{
if (!aTransactionItem) {
return;
}
RefPtr<nsTransactionItem> item(aTransactionItem);
Push(item.forget());
}
void
nsTransactionStack::Push(already_AddRefed<nsTransactionItem> aTransactionItem)
{
RefPtr<nsTransactionItem> item(aTransactionItem);
if (!item) {
return;
}
nsDeque::Push(item.forget().take());
}
already_AddRefed<nsTransactionItem>
nsTransactionStack::Pop()
{
RefPtr<nsTransactionItem> item =
dont_AddRef(static_cast<nsTransactionItem*>(nsDeque::Pop()));
return item.forget();
}
already_AddRefed<nsTransactionItem>
nsTransactionStack::PopBottom()
{
RefPtr<nsTransactionItem> item =
dont_AddRef(static_cast<nsTransactionItem*>(nsDeque::PopFront()));
return item.forget();
}
already_AddRefed<nsTransactionItem>
nsTransactionStack::Peek()
{
RefPtr<nsTransactionItem> item =
static_cast<nsTransactionItem*>(nsDeque::Peek());
return item.forget();
}
already_AddRefed<nsTransactionItem>
nsTransactionStack::GetItem(int32_t aIndex)
{
if (aIndex < 0 || aIndex >= static_cast<int32_t>(nsDeque::GetSize())) {
return nullptr;
}
RefPtr<nsTransactionItem> item =
static_cast<nsTransactionItem*>(nsDeque::ObjectAt(aIndex));
return item.forget();
}
void
nsTransactionStack::Clear()
{
while (GetSize() != 0) {
RefPtr<nsTransactionItem> item =
mType == FOR_UNDO ? Pop() : PopBottom();
}
}
void
nsTransactionStack::DoTraverse(nsCycleCollectionTraversalCallback &cb)
{
int32_t size = GetSize();
for (int32_t i = 0; i < size; ++i) {
nsTransactionItem* item = static_cast<nsTransactionItem*>(nsDeque::ObjectAt(i));
if (item) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "transaction stack mDeque[i]");
cb.NoteNativeChild(item, NS_CYCLE_COLLECTION_PARTICIPANT(nsTransactionItem));
}
}
}
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