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      1 /*
      2  * Copyright (C) 2010 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 #ifndef FileWriter_h
     32 #define FileWriter_h
     33 
     34 #include "core/dom/ActiveDOMObject.h"
     35 #include "core/dom/ExecutionContext.h"
     36 #include "core/fileapi/FileError.h"
     37 #include "modules/EventTargetModules.h"
     38 #include "modules/filesystem/FileWriterBase.h"
     39 #include "platform/heap/Handle.h"
     40 #include "public/platform/WebFileWriterClient.h"
     41 #include "wtf/RefPtr.h"
     42 
     43 namespace blink {
     44 
     45 class Blob;
     46 class ExceptionState;
     47 class ExecutionContext;
     48 
     49 class FileWriter FINAL : public FileWriterBase, public ActiveDOMObject, public EventTargetWithInlineData, public WebFileWriterClient {
     50     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<FileWriterBase>);
     51     DEFINE_WRAPPERTYPEINFO();
     52     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileWriter);
     53 public:
     54     static FileWriter* create(ExecutionContext*);
     55 
     56     enum ReadyState {
     57         INIT = 0,
     58         WRITING = 1,
     59         DONE = 2
     60     };
     61 
     62     void write(Blob*, ExceptionState&);
     63     void seek(long long position, ExceptionState&);
     64     void truncate(long long length, ExceptionState&);
     65     void abort(ExceptionState&);
     66     ReadyState readyState() const { return m_readyState; }
     67     FileError* error() const { return m_error.get(); }
     68 
     69     // WebFileWriterClient
     70     virtual void didWrite(long long bytes, bool complete) OVERRIDE;
     71     virtual void didTruncate() OVERRIDE;
     72     virtual void didFail(WebFileError) OVERRIDE;
     73 
     74     // ActiveDOMObject
     75     virtual void stop() OVERRIDE;
     76     virtual bool hasPendingActivity() const OVERRIDE;
     77 
     78     // EventTarget
     79     virtual const AtomicString& interfaceName() const OVERRIDE;
     80     virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
     81 
     82     DEFINE_ATTRIBUTE_EVENT_LISTENER(writestart);
     83     DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
     84     DEFINE_ATTRIBUTE_EVENT_LISTENER(write);
     85     DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
     86     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     87     DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend);
     88 
     89     virtual void trace(Visitor*) OVERRIDE;
     90 
     91 private:
     92     enum Operation {
     93         OperationNone,
     94         OperationWrite,
     95         OperationTruncate,
     96         OperationAbort
     97     };
     98 
     99     FileWriter(ExecutionContext*);
    100 
    101     virtual ~FileWriter();
    102 
    103     void completeAbort();
    104 
    105     void doOperation(Operation);
    106 
    107     void signalCompletion(FileError::ErrorCode);
    108 
    109     void fireEvent(const AtomicString& type);
    110 
    111     void setError(FileError::ErrorCode, ExceptionState&);
    112 
    113     RefPtrWillBeMember<FileError> m_error;
    114     ReadyState m_readyState;
    115     Operation m_operationInProgress;
    116     Operation m_queuedOperation;
    117     long long m_bytesWritten;
    118     long long m_bytesToWrite;
    119     long long m_truncateLength;
    120     long long m_numAborts;
    121     long long m_recursionDepth;
    122     double m_lastProgressNotificationTimeMS;
    123     RefPtrWillBeMember<Blob> m_blobBeingWritten;
    124     int m_asyncOperationId;
    125 };
    126 
    127 } // namespace blink
    128 
    129 #endif // FileWriter_h
    130