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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 HTMLImportChild_h
     32 #define HTMLImportChild_h
     33 
     34 #include "core/html/imports/HTMLImport.h"
     35 #include "platform/heap/Handle.h"
     36 #include "platform/weborigin/KURL.h"
     37 #include "wtf/Vector.h"
     38 #include "wtf/WeakPtr.h"
     39 
     40 namespace WebCore {
     41 
     42 class CustomElementMicrotaskImportStep;
     43 class HTMLImportLoader;
     44 class HTMLImportChildClient;
     45 class HTMLLinkElement;
     46 
     47 //
     48 // An import tree node subclas to encapsulate imported document
     49 // lifecycle. This class is owned by HTMLImportsController. The actual loading
     50 // is done by HTMLImportLoader, which can be shared among multiple
     51 // HTMLImportChild of same link URL.
     52 //
     53 class HTMLImportChild FINAL : public HTMLImport {
     54 public:
     55     HTMLImportChild(const KURL&, HTMLImportLoader*, SyncMode);
     56     virtual ~HTMLImportChild();
     57 
     58     HTMLLinkElement* link() const;
     59     const KURL& url() const { return m_url; }
     60 
     61     void ownerInserted();
     62     void didShareLoader();
     63     void didStartLoading();
     64 #if !ENABLE(OILPAN)
     65     void importDestroyed();
     66     WeakPtr<HTMLImportChild> weakPtr() { return m_weakFactory.createWeakPtr(); }
     67 #endif
     68 
     69     // HTMLImport
     70     virtual Document* document() const OVERRIDE;
     71     virtual bool isDone() const OVERRIDE;
     72     virtual HTMLImportLoader* loader() const OVERRIDE;
     73     virtual void stateWillChange() OVERRIDE;
     74     virtual void stateDidChange() OVERRIDE;
     75     virtual void trace(Visitor*) OVERRIDE;
     76 
     77 #if !defined(NDEBUG)
     78     virtual void showThis() OVERRIDE;
     79 #endif
     80 
     81     void setClient(HTMLImportChildClient*);
     82 #if !ENABLE(OILPAN)
     83     void clearClient();
     84 #endif
     85 
     86     void didFinishLoading();
     87     void didFinishUpgradingCustomElements();
     88     void normalize();
     89 
     90 private:
     91     void didFinish();
     92     void shareLoader();
     93     void createCustomElementMicrotaskStepIfNeeded();
     94 
     95     KURL m_url;
     96     WeakPtrWillBeWeakMember<CustomElementMicrotaskImportStep> m_customElementMicrotaskStep;
     97 #if !ENABLE(OILPAN)
     98     WeakPtrFactory<HTMLImportChild> m_weakFactory;
     99 #endif
    100     RawPtrWillBeMember<HTMLImportLoader> m_loader;
    101     RawPtrWillBeMember<HTMLImportChildClient> m_client;
    102 };
    103 
    104 inline HTMLImportChild* toHTMLImportChild(HTMLImport* import)
    105 {
    106     ASSERT(!import || !import->isRoot());
    107     return static_cast<HTMLImportChild*>(import);
    108 }
    109 
    110 } // namespace WebCore
    111 
    112 #endif // HTMLImportChild_h
    113