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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
      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 HTMLResourcePreloader_h
     27 #define HTMLResourcePreloader_h
     28 
     29 #include "core/loader/cache/FetchRequest.h"
     30 #include "core/loader/cache/Resource.h"
     31 #include "wtf/CurrentTime.h"
     32 #include "wtf/text/TextPosition.h"
     33 
     34 namespace WebCore {
     35 
     36 class PreloadRequest {
     37 public:
     38     static PassOwnPtr<PreloadRequest> create(const String& initiatorName, const TextPosition& initiatorPosition, const String& resourceURL, const KURL& baseURL, Resource::Type resourceType, const String& mediaAttribute)
     39     {
     40         return adoptPtr(new PreloadRequest(initiatorName, initiatorPosition, resourceURL, baseURL, resourceType, mediaAttribute));
     41     }
     42 
     43     static PassOwnPtr<PreloadRequest> create(const String& initiatorName, const TextPosition& initiatorPosition, const String& resourceURL, const KURL& baseURL, Resource::Type resourceType)
     44     {
     45         return adoptPtr(new PreloadRequest(initiatorName, initiatorPosition, resourceURL, baseURL, resourceType, ""));
     46     }
     47 
     48     bool isSafeToSendToAnotherThread() const;
     49 
     50     FetchRequest resourceRequest(Document*);
     51 
     52     const String& charset() const { return m_charset; }
     53     const String& media() const { return m_mediaAttribute; }
     54     double discoveryTime() const { return m_discoveryTime; }
     55     void setCharset(const String& charset) { m_charset = charset.isolatedCopy(); }
     56     void setCrossOriginModeAllowsCookies(bool allowsCookies) { m_crossOriginModeAllowsCookies = allowsCookies; }
     57     Resource::Type resourceType() const { return m_resourceType; }
     58 
     59 private:
     60     PreloadRequest(const String& initiatorName, const TextPosition& initiatorPosition, const String& resourceURL, const KURL& baseURL, Resource::Type resourceType, const String& mediaAttribute)
     61         : m_initiatorName(initiatorName)
     62         , m_initiatorPosition(initiatorPosition)
     63         , m_resourceURL(resourceURL.isolatedCopy())
     64         , m_baseURL(baseURL.copy())
     65         , m_resourceType(resourceType)
     66         , m_mediaAttribute(mediaAttribute.isolatedCopy())
     67         , m_crossOriginModeAllowsCookies(false)
     68         , m_discoveryTime(monotonicallyIncreasingTime())
     69     {
     70     }
     71 
     72     KURL completeURL(Document*);
     73 
     74     String m_initiatorName;
     75     TextPosition m_initiatorPosition;
     76     String m_resourceURL;
     77     KURL m_baseURL;
     78     String m_charset;
     79     Resource::Type m_resourceType;
     80     String m_mediaAttribute;
     81     bool m_crossOriginModeAllowsCookies;
     82     double m_discoveryTime;
     83 };
     84 
     85 typedef Vector<OwnPtr<PreloadRequest> > PreloadRequestStream;
     86 
     87 class HTMLResourcePreloader {
     88     WTF_MAKE_NONCOPYABLE(HTMLResourcePreloader); WTF_MAKE_FAST_ALLOCATED;
     89 public:
     90     explicit HTMLResourcePreloader(Document* document)
     91         : m_document(document)
     92         , m_weakFactory(this)
     93     {
     94     }
     95 
     96     void takeAndPreload(PreloadRequestStream&);
     97     void preload(PassOwnPtr<PreloadRequest>);
     98 
     99     WeakPtr<HTMLResourcePreloader> createWeakPtr() { return m_weakFactory.createWeakPtr(); }
    100 
    101 private:
    102     Document* m_document;
    103     WeakPtrFactory<HTMLResourcePreloader> m_weakFactory;
    104 };
    105 
    106 }
    107 
    108 #endif
    109