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      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 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 CustomElementUpgradeCandidateMap_h
     32 #define CustomElementUpgradeCandidateMap_h
     33 
     34 #include "core/dom/custom/CustomElementDescriptor.h"
     35 #include "core/dom/custom/CustomElementDescriptorHash.h"
     36 #include "core/dom/custom/CustomElementObserver.h"
     37 #include "wtf/HashMap.h"
     38 #include "wtf/LinkedHashSet.h"
     39 #include "wtf/Noncopyable.h"
     40 
     41 namespace blink {
     42 
     43 class Element;
     44 
     45 class CustomElementUpgradeCandidateMap FINAL : public CustomElementObserver {
     46     WTF_MAKE_NONCOPYABLE(CustomElementUpgradeCandidateMap);
     47 public:
     48     static PassOwnPtrWillBeRawPtr<CustomElementUpgradeCandidateMap> create();
     49     virtual ~CustomElementUpgradeCandidateMap();
     50 
     51     // API for CustomElementRegistrationContext to save and take candidates
     52 
     53     typedef WillBeHeapLinkedHashSet<RawPtrWillBeWeakMember<Element> > ElementSet;
     54 
     55     void add(const CustomElementDescriptor&, Element*);
     56     PassOwnPtrWillBeRawPtr<ElementSet> takeUpgradeCandidatesFor(const CustomElementDescriptor&);
     57 
     58     virtual void trace(Visitor*) OVERRIDE;
     59 
     60 private:
     61     CustomElementUpgradeCandidateMap() { }
     62 
     63     virtual void elementWasDestroyed(Element*) OVERRIDE;
     64 
     65     virtual void elementDidFinishParsingChildren(Element*) OVERRIDE;
     66     void moveToEnd(Element*);
     67 
     68     typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<Element>, CustomElementDescriptor> UpgradeCandidateMap;
     69     UpgradeCandidateMap m_upgradeCandidates;
     70 
     71     typedef WillBeHeapHashMap<CustomElementDescriptor, OwnPtrWillBeMember<ElementSet> > UnresolvedDefinitionMap;
     72     UnresolvedDefinitionMap m_unresolvedDefinitions;
     73 };
     74 
     75 }
     76 
     77 #endif // CustomElementUpgradeCandidateMap_h
     78