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      1 /*
      2  * Copyright (C) 2012 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 
     32 #ifndef Prerenderer_h
     33 #define Prerenderer_h
     34 
     35 #include "core/dom/ActiveDOMObject.h"
     36 #include "weborigin/KURL.h"
     37 #include "wtf/PassOwnPtr.h"
     38 #include "wtf/PassRefPtr.h"
     39 #include "wtf/RefPtr.h"
     40 #include "wtf/Vector.h"
     41 
     42 namespace WebCore {
     43 
     44 class Document;
     45 class PrerenderClient;
     46 class PrerenderHandle;
     47 class PrerendererClient;
     48 class Page;
     49 
     50 class Prerenderer : public ActiveDOMObject {
     51     WTF_MAKE_NONCOPYABLE(Prerenderer);
     52 public:
     53     virtual ~Prerenderer();
     54 
     55     PassRefPtr<PrerenderHandle> render(PrerenderClient*, const KURL&);
     56 
     57     static PassOwnPtr<Prerenderer> create(Document*);
     58 
     59     // From ActiveDOMObject:
     60     virtual bool canSuspend() const OVERRIDE { return true; }
     61     virtual void stop() OVERRIDE;
     62     virtual void suspend(ReasonForSuspension) OVERRIDE;
     63     virtual void resume() OVERRIDE;
     64 
     65 private:
     66     typedef Vector<RefPtr<PrerenderHandle> > HandleVector;
     67     typedef Vector<KURL> KURLVector;
     68 
     69     explicit Prerenderer(Document*);
     70 
     71     Document* document();
     72     PrerendererClient* client();
     73 
     74     bool m_initializedClient;
     75     PrerendererClient* m_client;
     76     HandleVector m_activeHandles;
     77     HandleVector m_suspendedHandles;
     78 };
     79 
     80 }
     81 
     82 #endif // Prerenderer_h
     83