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      1 /*
      2  * Copyright (C) 2008 Apple 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef IconFetcher_h
     27 #define IconFetcher_h
     28 
     29 #include <wtf/RefCounted.h>
     30 #include <wtf/Forward.h>
     31 #include <wtf/Vector.h>
     32 
     33 #include "ResourceHandleClient.h"
     34 
     35 namespace WebCore {
     36 
     37 class Frame;
     38 struct IconLinkEntry;
     39 class ResourceHandle;
     40 class SharedBuffer;
     41 
     42 class IconFetcherClient {
     43 public:
     44     virtual void finishedFetchingIcon(PassRefPtr<SharedBuffer> iconData) = 0;
     45 
     46     virtual ~IconFetcherClient() { }
     47 };
     48 
     49 class IconFetcher : public RefCounted<IconFetcher>, ResourceHandleClient {
     50 public:
     51     static PassRefPtr<IconFetcher> create(Frame*, IconFetcherClient*);
     52     ~IconFetcher();
     53 
     54     void cancel();
     55 
     56 private:
     57     IconFetcher(Frame*, IconFetcherClient*);
     58     void loadEntry();
     59     void loadFailed();
     60 
     61     PassRefPtr<SharedBuffer> createIcon();
     62 
     63     virtual void didReceiveResponse(ResourceHandle*, const ResourceResponse&);
     64     virtual void didReceiveData(ResourceHandle*, const char*, int, int lengthReceived);
     65     virtual void didFinishLoading(ResourceHandle*);
     66     virtual void didFail(ResourceHandle*, const ResourceError&);
     67 
     68     Frame* m_frame;
     69     IconFetcherClient* m_client;
     70 
     71     unsigned m_currentEntry;
     72     RefPtr<ResourceHandle> m_handle;
     73     Vector<IconLinkEntry> m_entries;
     74 };
     75 
     76 } // namespace WebCore
     77 
     78 #endif // IconFetcher_h
     79