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 | #include "config.h" |
| 32 | |
| 33 | #include "core/dom/MutationObserverInterestGroup.h" |
| 34 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 35 | #include "core/dom/MutationRecord.h" |
| 36 | #include "core/dom/Node.h" |
| 37 | #include "core/dom/QualifiedName.h" |
| 38 | |
| 39 | namespace WebCore { |
| 40 | |
| 41 | PassOwnPtr<MutationObserverInterestGroup> MutationObserverInterestGroup::createIfNeeded(Node* target, MutationObserver::MutationType type, MutationRecordDeliveryOptions oldValueFlag, const QualifiedName* attributeName) |
| 42 | { |
| 43 | ASSERT((type == MutationObserver::Attributes && attributeName) || !attributeName); |
| 44 | HashMap<MutationObserver*, MutationRecordDeliveryOptions> observers; |
| 45 | target->getRegisteredMutationObserversOfType(observers, type, attributeName); |
| 46 | if (observers.isEmpty()) |
| 47 | return nullptr; |
| 48 | |
| 49 | return adoptPtr(new MutationObserverInterestGroup(observers, oldValueFlag)); |
| 50 | } |
| 51 | |
| 52 | MutationObserverInterestGroup::MutationObserverInterestGroup(HashMap<MutationObserver*, MutationRecordDeliveryOptions>& observers, MutationRecordDeliveryOptions oldValueFlag) |
| 53 | : m_oldValueFlag(oldValueFlag) |
| 54 | { |
| 55 | ASSERT(!observers.isEmpty()); |
| 56 | m_observers.swap(observers); |
| 57 | } |
| 58 | |
| 59 | bool MutationObserverInterestGroup::isOldValueRequested() |
| 60 | { |
| 61 | for (HashMap<MutationObserver*, MutationRecordDeliveryOptions>::iterator iter = m_observers.begin(); iter != m_observers.end(); ++iter) { |
| 62 | if (hasOldValue(iter->value)) |
| 63 | return true; |
| 64 | } |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | void MutationObserverInterestGroup::enqueueMutationRecord(PassRefPtr<MutationRecord> prpMutation) |
| 69 | { |
| 70 | RefPtr<MutationRecord> mutation = prpMutation; |
| 71 | RefPtr<MutationRecord> mutationWithNullOldValue; |
| 72 | for (HashMap<MutationObserver*, MutationRecordDeliveryOptions>::iterator iter = m_observers.begin(); iter != m_observers.end(); ++iter) { |
| 73 | MutationObserver* observer = iter->key; |
| 74 | if (hasOldValue(iter->value)) { |
| 75 | observer->enqueueMutationRecord(mutation); |
| 76 | continue; |
| 77 | } |
| 78 | if (!mutationWithNullOldValue) { |
| 79 | if (mutation->oldValue().isNull()) |
| 80 | mutationWithNullOldValue = mutation; |
| 81 | else |
| 82 | mutationWithNullOldValue = MutationRecord::createWithNullOldValue(mutation).get(); |
| 83 | } |
| 84 | observer->enqueueMutationRecord(mutationWithNullOldValue); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | } // namespace WebCore |