editor/txmgr/TransactionStack.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "TransactionStack.h"
   7
   8 #include "nsCycleCollectionParticipant.h"
   9 #include "nsDebug.h"
  10 #include "nsISupportsUtils.h"
  11 #include "nscore.h"
  12 #include "TransactionItem.h"
  13
  14 namespace mozilla {
  15
  16 TransactionStack::TransactionStack(Type aType) : mType(aType) {}
  17
  18 TransactionStack::~TransactionStack() { Clear(); }
  19
  20 void TransactionStack::Push(TransactionItem* aTransactionItem) {
  21   if (NS_WARN_IF(!aTransactionItem)) {
  22     return;
  23   }
  24   nsRefPtrDeque<TransactionItem>::Push(aTransactionItem);
  25 }
  26
  27 void TransactionStack::Push(
  28     already_AddRefed<TransactionItem> aTransactionItem) {
  29   TransactionItem* transactionItem = aTransactionItem.take();
  30   if (NS_WARN_IF(!transactionItem)) {
  31     return;
  32   }
  33   nsRefPtrDeque<TransactionItem>::Push(dont_AddRef(transactionItem));
  34 }
  35
  36 already_AddRefed<TransactionItem> TransactionStack::Pop() {
  37   return nsRefPtrDeque<TransactionItem>::Pop();
  38 }
  39
  40 already_AddRefed<TransactionItem> TransactionStack::PopBottom() {
  41   return nsRefPtrDeque<TransactionItem>::PopFront();
  42 }
  43
  44 already_AddRefed<TransactionItem> TransactionStack::Peek() const {
  45   RefPtr<TransactionItem> item = nsRefPtrDeque<TransactionItem>::Peek();
  46   return item.forget();
  47 }
  48
  49 already_AddRefed<TransactionItem> TransactionStack::GetItemAt(
  50     size_t aIndex) const {
  51   RefPtr<TransactionItem> item =
  52       nsRefPtrDeque<TransactionItem>::ObjectAt(aIndex);
  53   return item.forget();
  54 }
  55
  56 void TransactionStack::Clear() {
  57   while (GetSize()) {
  58     RefPtr<TransactionItem> item = mType == FOR_UNDO ? Pop() : PopBottom();
  59   }
  60 }
  61
  62 void TransactionStack::DoTraverse(nsCycleCollectionTraversalCallback& cb) {
  63   size_t size = GetSize();
  64   for (size_t i = 0; i < size; ++i) {
  65     auto* item = nsRefPtrDeque<TransactionItem>::ObjectAt(i);
  66     if (item) {
  67       NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "transaction stack mDeque[i]");
  68       cb.NoteNativeChild(item,
  69                          NS_CYCLE_COLLECTION_PARTICIPANT(TransactionItem));
  70     }
  71   }
  72 }
  73
  74 }  // namespace mozilla