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      1 /*
      2  * Copyright (C) 2007 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  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef PageURLRecord_h
     30 #define PageURLRecord_h
     31 
     32 #include "PlatformString.h"
     33 
     34 #include <wtf/Noncopyable.h>
     35 #include <wtf/RefPtr.h>
     36 
     37 namespace WebCore {
     38 
     39 class IconRecord;
     40 
     41 class PageURLSnapshot {
     42 public:
     43     PageURLSnapshot() { }
     44 
     45     PageURLSnapshot(const String& pageURL, const String& iconURL)
     46         : m_pageURL(pageURL)
     47         , m_iconURL(iconURL)
     48     { }
     49 
     50     const String& pageURL() const { return m_pageURL; }
     51     const String& iconURL() const { return m_iconURL; }
     52 
     53 private:
     54     String m_pageURL;
     55     String m_iconURL;
     56 };
     57 
     58 class PageURLRecord {
     59     WTF_MAKE_NONCOPYABLE(PageURLRecord); WTF_MAKE_FAST_ALLOCATED;
     60 public:
     61     PageURLRecord(const String& pageURL);
     62     ~PageURLRecord();
     63 
     64     inline String url() const { return m_pageURL; }
     65 
     66     void setIconRecord(PassRefPtr<IconRecord>);
     67     IconRecord* iconRecord() { return m_iconRecord.get(); }
     68 
     69     PageURLSnapshot snapshot(bool forDeletion = false) const;
     70 
     71     // Returns false if the page wasn't retained beforehand, true if the retain count was already 1 or higher
     72     inline bool retain() { return m_retainCount++; }
     73 
     74     // Returns true if the page is still retained after the call.  False if the retain count just dropped to 0
     75     inline bool release()
     76     {
     77         ASSERT(m_retainCount > 0);
     78         return --m_retainCount;
     79     }
     80 
     81     inline int retainCount() const { return m_retainCount; }
     82 private:
     83     String m_pageURL;
     84     RefPtr<IconRecord> m_iconRecord;
     85     int m_retainCount;
     86 };
     87 
     88 }
     89 
     90 #endif // PageURLRecord_h
     91