1 /* 2 * Copyright (C) 2013 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 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * 3. Neither the name of Google Inc. nor the names of its contributors 15 * may be used to endorse or promote products derived from this 16 * 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 #include "core/dom/custom/CustomElementObserver.h" 33 34 #include "core/dom/Element.h" 35 36 namespace blink { 37 38 // Maps elements to the observer watching them. At most one per 39 // element at a time. 40 typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<Element>, RawPtrWillBeMember<CustomElementObserver> > ElementObserverMap; 41 42 static ElementObserverMap& elementObservers() 43 { 44 DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ElementObserverMap>, map, (adoptPtrWillBeNoop(new ElementObserverMap()))); 45 return *map; 46 } 47 48 void CustomElementObserver::notifyElementDidFinishParsingChildren(Element* element) 49 { 50 ElementObserverMap::iterator it = elementObservers().find(element); 51 if (it == elementObservers().end()) 52 return; 53 it->value->elementDidFinishParsingChildren(element); 54 } 55 56 void CustomElementObserver::notifyElementWasDestroyed(Element* element) 57 { 58 ElementObserverMap::iterator it = elementObservers().find(element); 59 if (it == elementObservers().end()) 60 return; 61 it->value->elementWasDestroyed(element); 62 } 63 64 void CustomElementObserver::observe(Element* element) 65 { 66 ElementObserverMap::AddResult result = elementObservers().add(element, this); 67 ASSERT_UNUSED(result, result.isNewEntry); 68 } 69 70 void CustomElementObserver::unobserve(Element* element) 71 { 72 CustomElementObserver* observer = elementObservers().take(element); 73 ASSERT_UNUSED(observer, observer == this); 74 } 75 76 } // namespace blink 77