Home | History | Annotate | Download | only in loader 
      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  * 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 COMPUTER, 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 COMPUTER, 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 ProgressTracker_h
     27 #define ProgressTracker_h
     28 
     29 #include "wtf/Forward.h"
     30 #include "wtf/HashMap.h"
     31 #include "wtf/Noncopyable.h"
     32 #include "wtf/OwnPtr.h"
     33 #include "wtf/RefPtr.h"
     34 
     35 namespace WebCore {
     36 
     37 class Frame;
     38 class ResourceResponse;
     39 struct ProgressItem;
     40 
     41 // FIXME: This is only used on Android. Android is the only Chrome
     42 // browser which shows a progress bar during loading.
     43 // We should find a better way for Android to get this data and remove this!
     44 class ProgressTracker {
     45     WTF_MAKE_NONCOPYABLE(ProgressTracker); WTF_MAKE_FAST_ALLOCATED;
     46 public:
     47     ~ProgressTracker();
     48 
     49     static PassOwnPtr<ProgressTracker> create();
     50     static unsigned long createUniqueIdentifier();
     51 
     52     double estimatedProgress() const;
     53 
     54     void progressStarted(Frame*);
     55     void progressCompleted(Frame*);
     56 
     57     void incrementProgress(unsigned long identifier, const ResourceResponse&);
     58     void incrementProgress(unsigned long identifier, const char*, int);
     59     void completeProgress(unsigned long identifier);
     60 
     61     long long totalPageAndResourceBytesToLoad() const { return m_totalPageAndResourceBytesToLoad; }
     62     long long totalBytesReceived() const { return m_totalBytesReceived; }
     63 
     64 private:
     65     ProgressTracker();
     66 
     67     void reset();
     68     void finalProgressComplete();
     69 
     70     long long m_totalPageAndResourceBytesToLoad;
     71     long long m_totalBytesReceived;
     72     double m_lastNotifiedProgressValue;
     73     double m_lastNotifiedProgressTime;
     74     double m_progressNotificationInterval;
     75     double m_progressNotificationTimeInterval;
     76     bool m_finalProgressChangedSent;
     77     double m_progressValue;
     78     RefPtr<Frame> m_originatingProgressFrame;
     79 
     80     int m_numProgressTrackedFrames;
     81     HashMap<unsigned long, OwnPtr<ProgressItem> > m_progressItems;
     82 };
     83 
     84 }
     85 
     86 #endif
     87