/src/mozilla-central/editor/txmgr/TransactionStack.cpp
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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 "mozilla/TransactionStack.h" |
7 | | |
8 | | #include "nsCOMPtr.h" |
9 | | #include "nsCycleCollectionParticipant.h" |
10 | | #include "nsISupportsUtils.h" |
11 | | #include "nscore.h" |
12 | | #include "TransactionItem.h" |
13 | | |
14 | | namespace mozilla { |
15 | | |
16 | | class TransactionStackDeallocator final : public nsDequeFunctor |
17 | | { |
18 | | virtual void operator()(void* aObject) override |
19 | 0 | { |
20 | 0 | RefPtr<TransactionItem> releaseMe = |
21 | 0 | dont_AddRef(static_cast<TransactionItem*>(aObject)); |
22 | 0 | } |
23 | | }; |
24 | | |
25 | | TransactionStack::TransactionStack(Type aType) |
26 | | : nsDeque(new TransactionStackDeallocator()) |
27 | | , mType(aType) |
28 | 0 | { |
29 | 0 | } |
30 | | |
31 | | TransactionStack::~TransactionStack() |
32 | 0 | { |
33 | 0 | Clear(); |
34 | 0 | } |
35 | | |
36 | | void |
37 | | TransactionStack::Push(TransactionItem* aTransactionItem) |
38 | 0 | { |
39 | 0 | if (!aTransactionItem) { |
40 | 0 | return; |
41 | 0 | } |
42 | 0 | |
43 | 0 | RefPtr<TransactionItem> item(aTransactionItem); |
44 | 0 | Push(item.forget()); |
45 | 0 | } |
46 | | |
47 | | void |
48 | | TransactionStack::Push(already_AddRefed<TransactionItem> aTransactionItem) |
49 | 0 | { |
50 | 0 | RefPtr<TransactionItem> item(aTransactionItem); |
51 | 0 | if (!item) { |
52 | 0 | return; |
53 | 0 | } |
54 | 0 | |
55 | 0 | nsDeque::Push(item.forget().take()); |
56 | 0 | } |
57 | | |
58 | | already_AddRefed<TransactionItem> |
59 | | TransactionStack::Pop() |
60 | 0 | { |
61 | 0 | RefPtr<TransactionItem> item = |
62 | 0 | dont_AddRef(static_cast<TransactionItem*>(nsDeque::Pop())); |
63 | 0 | return item.forget(); |
64 | 0 | } |
65 | | |
66 | | already_AddRefed<TransactionItem> |
67 | | TransactionStack::PopBottom() |
68 | 0 | { |
69 | 0 | RefPtr<TransactionItem> item = |
70 | 0 | dont_AddRef(static_cast<TransactionItem*>(nsDeque::PopFront())); |
71 | 0 | return item.forget(); |
72 | 0 | } |
73 | | |
74 | | already_AddRefed<TransactionItem> |
75 | | TransactionStack::Peek() |
76 | 0 | { |
77 | 0 | RefPtr<TransactionItem> item = |
78 | 0 | static_cast<TransactionItem*>(nsDeque::Peek()); |
79 | 0 | return item.forget(); |
80 | 0 | } |
81 | | |
82 | | already_AddRefed<TransactionItem> |
83 | | TransactionStack::GetItem(int32_t aIndex) |
84 | 0 | { |
85 | 0 | if (aIndex < 0 || aIndex >= static_cast<int32_t>(nsDeque::GetSize())) { |
86 | 0 | return nullptr; |
87 | 0 | } |
88 | 0 | RefPtr<TransactionItem> item = |
89 | 0 | static_cast<TransactionItem*>(nsDeque::ObjectAt(aIndex)); |
90 | 0 | return item.forget(); |
91 | 0 | } |
92 | | |
93 | | void |
94 | | TransactionStack::Clear() |
95 | 0 | { |
96 | 0 | while (GetSize() != 0) { |
97 | 0 | RefPtr<TransactionItem> item = |
98 | 0 | mType == FOR_UNDO ? Pop() : PopBottom(); |
99 | 0 | } |
100 | 0 | } |
101 | | |
102 | | void |
103 | | TransactionStack::DoTraverse(nsCycleCollectionTraversalCallback &cb) |
104 | 0 | { |
105 | 0 | size_t size = GetSize(); |
106 | 0 | for (size_t i = 0; i < size; ++i) { |
107 | 0 | TransactionItem* item = static_cast<TransactionItem*>(nsDeque::ObjectAt(i)); |
108 | 0 | if (item) { |
109 | 0 | NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "transaction stack mDeque[i]"); |
110 | 0 | cb.NoteNativeChild(item, |
111 | 0 | NS_CYCLE_COLLECTION_PARTICIPANT(TransactionItem)); |
112 | 0 | } |
113 | 0 | } |
114 | 0 | } |
115 | | |
116 | | } // namespace mozilla |