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      1 /*
      2  * Copyright (C) 2010 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 ScriptCachedFrameData_h
     32 #define ScriptCachedFrameData_h
     33 
     34 #if PLATFORM(CHROMIUM)
     35 // We don't use WebKit's page caching, so this implementation is just a stub.
     36 
     37 namespace WebCore {
     38 
     39 class Frame;
     40 class DOMWindow;
     41 
     42 class ScriptCachedFrameData  {
     43 public:
     44     ScriptCachedFrameData(Frame*) { }
     45     ~ScriptCachedFrameData() { }
     46 
     47     void restore(Frame*) { }
     48     void clear() { }
     49     DOMWindow* domWindow() const { return 0; }
     50 };
     51 
     52 } // namespace WebCore
     53 
     54 #elif PLATFORM(ANDROID) || PLATFORM(QT)
     55 // FIXME: the right guard should be ENABLE(PAGE_CACHE). Replace with the right guard, once
     56 // https://bugs.webkit.org/show_bug.cgi?id=35061 is fixed.
     57 //
     58 // On Android we do use WebKit's page cache. For now we don't support isolated worlds
     59 // so our implementation does not take them into account.
     60 
     61 #include "OwnHandle.h"
     62 #include <v8.h>
     63 #include <wtf/Noncopyable.h>
     64 
     65 namespace WebCore {
     66 
     67 class Frame;
     68 class DOMWindow;
     69 
     70 class ScriptCachedFrameData  {
     71     WTF_MAKE_NONCOPYABLE(ScriptCachedFrameData);
     72 public:
     73     ScriptCachedFrameData(Frame*);
     74     ~ScriptCachedFrameData() { }
     75 
     76     void restore(Frame*);
     77     void clear();
     78     DOMWindow* domWindow() const;
     79 
     80 private:
     81     OwnHandle<v8::Object> m_global;
     82     OwnHandle<v8::Context> m_context;
     83     DOMWindow* m_domWindow;
     84 };
     85 
     86 } // namespace WebCore
     87 
     88 #else
     89 #error You need to consider whether you want Page Cache and either add a stub or a real implementation.
     90 #endif // PLATFORM(CHROMIUM)
     91 
     92 #endif // ScriptCachedFrameData_h
     93