Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Google Inc. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are |
| 6 | * met: |
| 7 | * |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above |
| 11 | * copyright notice, this list of conditions and the following disclaimer |
| 12 | * in the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * * Neither the name of Google Inc. nor the names of its |
| 15 | * contributors may be used to endorse or promote products derived from |
| 16 | * this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #ifndef MutationObserverInterestGroup_h |
| 32 | #define MutationObserverInterestGroup_h |
| 33 | |
| 34 | #include "core/dom/Document.h" |
| 35 | #include "core/dom/MutationObserver.h" |
| 36 | #include "core/dom/Node.h" |
| 37 | #include "core/dom/QualifiedName.h" |
Ben Murdoch | e69819b | 2013-07-17 14:56:49 +0100 | [diff] [blame] | 38 | #include "wtf/HashMap.h" |
| 39 | #include "wtf/PassOwnPtr.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 40 | |
| 41 | namespace WebCore { |
| 42 | |
| 43 | class MutationObserverInterestGroup { |
| 44 | public: |
| 45 | static PassOwnPtr<MutationObserverInterestGroup> createForChildListMutation(Node* target) |
| 46 | { |
| 47 | if (!target->document()->hasMutationObserversOfType(MutationObserver::ChildList)) |
| 48 | return nullptr; |
| 49 | |
| 50 | MutationRecordDeliveryOptions oldValueFlag = 0; |
| 51 | return createIfNeeded(target, MutationObserver::ChildList, oldValueFlag); |
| 52 | } |
| 53 | |
| 54 | static PassOwnPtr<MutationObserverInterestGroup> createForCharacterDataMutation(Node* target) |
| 55 | { |
| 56 | if (!target->document()->hasMutationObserversOfType(MutationObserver::CharacterData)) |
| 57 | return nullptr; |
| 58 | |
| 59 | return createIfNeeded(target, MutationObserver::CharacterData, MutationObserver::CharacterDataOldValue); |
| 60 | } |
| 61 | |
| 62 | static PassOwnPtr<MutationObserverInterestGroup> createForAttributesMutation(Node* target, const QualifiedName& attributeName) |
| 63 | { |
| 64 | if (!target->document()->hasMutationObserversOfType(MutationObserver::Attributes)) |
| 65 | return nullptr; |
| 66 | |
| 67 | return createIfNeeded(target, MutationObserver::Attributes, MutationObserver::AttributeOldValue, &attributeName); |
| 68 | } |
| 69 | |
| 70 | bool isOldValueRequested(); |
| 71 | void enqueueMutationRecord(PassRefPtr<MutationRecord>); |
| 72 | |
| 73 | private: |
| 74 | static PassOwnPtr<MutationObserverInterestGroup> createIfNeeded(Node* target, MutationObserver::MutationType, MutationRecordDeliveryOptions oldValueFlag, const QualifiedName* attributeName = 0); |
| 75 | MutationObserverInterestGroup(HashMap<MutationObserver*, MutationRecordDeliveryOptions>& observers, MutationRecordDeliveryOptions oldValueFlag); |
| 76 | |
| 77 | bool hasOldValue(MutationRecordDeliveryOptions options) { return options & m_oldValueFlag; } |
| 78 | |
| 79 | HashMap<MutationObserver*, MutationRecordDeliveryOptions> m_observers; |
| 80 | MutationRecordDeliveryOptions m_oldValueFlag; |
| 81 | }; |
| 82 | |
| 83 | } |
| 84 | |
| 85 | #endif // MutationObserverInterestGroup_h |