The Tor Browser / file comparison
comparison: layout/base/nsLayoutHistoryState.cpp
layout/base/nsLayoutHistoryState.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:760266c86ec3 |
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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 /* | |
| 7 * container for information saved in session history when the document | |
| 8 * is not | |
| 9 */ | |
| 10 | |
| 11 #include "nsILayoutHistoryState.h" | |
| 12 #include "nsWeakReference.h" | |
| 13 #include "nsClassHashtable.h" | |
| 14 #include "nsPresState.h" | |
| 15 #include "mozilla/Attributes.h" | |
| 16 | |
| 17 class nsLayoutHistoryState MOZ_FINAL : public nsILayoutHistoryState, | |
| 18 public nsSupportsWeakReference | |
| 19 { | |
| 20 public: | |
| 21 nsLayoutHistoryState() | |
| 22 : mScrollPositionOnly(false) | |
| 23 { | |
| 24 } | |
| 25 | |
| 26 NS_DECL_ISUPPORTS | |
| 27 | |
| 28 // nsILayoutHistoryState | |
| 29 virtual void | |
| 30 AddState(const nsCString& aKey, nsPresState* aState) MOZ_OVERRIDE; | |
| 31 virtual nsPresState* | |
| 32 GetState(const nsCString& aKey) MOZ_OVERRIDE; | |
| 33 virtual void | |
| 34 RemoveState(const nsCString& aKey) MOZ_OVERRIDE; | |
| 35 virtual bool | |
| 36 HasStates() const MOZ_OVERRIDE; | |
| 37 virtual void | |
| 38 SetScrollPositionOnly(const bool aFlag) MOZ_OVERRIDE; | |
| 39 | |
| 40 | |
| 41 private: | |
| 42 ~nsLayoutHistoryState() {} | |
| 43 bool mScrollPositionOnly; | |
| 44 | |
| 45 nsClassHashtable<nsCStringHashKey,nsPresState> mStates; | |
| 46 }; | |
| 47 | |
| 48 | |
| 49 already_AddRefed<nsILayoutHistoryState> | |
| 50 NS_NewLayoutHistoryState() | |
| 51 { | |
| 52 nsRefPtr<nsLayoutHistoryState> state = new nsLayoutHistoryState(); | |
| 53 return state.forget(); | |
| 54 } | |
| 55 | |
| 56 NS_IMPL_ISUPPORTS(nsLayoutHistoryState, | |
| 57 nsILayoutHistoryState, | |
| 58 nsISupportsWeakReference) | |
| 59 | |
| 60 void | |
| 61 nsLayoutHistoryState::AddState(const nsCString& aStateKey, nsPresState* aState) | |
| 62 { | |
| 63 mStates.Put(aStateKey, aState); | |
| 64 } | |
| 65 | |
| 66 nsPresState* | |
| 67 nsLayoutHistoryState::GetState(const nsCString& aKey) | |
| 68 { | |
| 69 nsPresState* state = nullptr; | |
| 70 bool entryExists = mStates.Get(aKey, &state); | |
| 71 | |
| 72 if (entryExists && mScrollPositionOnly) { | |
| 73 // Ensure any state that shouldn't be restored is removed | |
| 74 state->ClearNonScrollState(); | |
| 75 } | |
| 76 | |
| 77 return state; | |
| 78 } | |
| 79 | |
| 80 void | |
| 81 nsLayoutHistoryState::RemoveState(const nsCString& aKey) | |
| 82 { | |
| 83 mStates.Remove(aKey); | |
| 84 } | |
| 85 | |
| 86 bool | |
| 87 nsLayoutHistoryState::HasStates() const | |
| 88 { | |
| 89 return mStates.Count() != 0; | |
| 90 } | |
| 91 | |
| 92 void | |
| 93 nsLayoutHistoryState::SetScrollPositionOnly(const bool aFlag) | |
| 94 { | |
| 95 mScrollPositionOnly = aFlag; | |
| 96 } |
