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 FileReader_h 32#define FileReader_h 33 34#include "bindings/v8/ScriptWrappable.h" 35#include "core/dom/ActiveDOMObject.h" 36#include "core/events/EventTarget.h" 37#include "core/fileapi/FileError.h" 38#include "core/fileapi/FileReaderLoader.h" 39#include "core/fileapi/FileReaderLoaderClient.h" 40#include "wtf/Forward.h" 41#include "wtf/RefCounted.h" 42#include "wtf/ThreadSpecific.h" 43#include "wtf/text/WTFString.h" 44 45namespace WebCore { 46 47class Blob; 48class ExceptionState; 49class ExecutionContext; 50 51class FileReader : public RefCounted<FileReader>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public FileReaderLoaderClient { 52 REFCOUNTED_EVENT_TARGET(FileReader); 53public: 54 static PassRefPtr<FileReader> create(ExecutionContext*); 55 56 virtual ~FileReader(); 57 58 enum ReadyState { 59 EMPTY = 0, 60 LOADING = 1, 61 DONE = 2 62 }; 63 64 void readAsArrayBuffer(Blob*, ExceptionState&); 65 void readAsBinaryString(Blob*, ExceptionState&); 66 void readAsText(Blob*, const String& encoding, ExceptionState&); 67 void readAsText(Blob*, ExceptionState&); 68 void readAsDataURL(Blob*, ExceptionState&); 69 void abort(); 70 71 void doAbort(); 72 73 ReadyState readyState() const { return m_state; } 74 PassRefPtr<FileError> error() { return m_error; } 75 FileReaderLoader::ReadType readType() const { return m_readType; } 76 PassRefPtr<ArrayBuffer> arrayBufferResult() const; 77 String stringResult(); 78 79 // ActiveDOMObject 80 virtual void stop(); 81 82 // EventTarget 83 virtual const AtomicString& interfaceName() const OVERRIDE; 84 virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); } 85 86 // FileReaderLoaderClient 87 virtual void didStartLoading(); 88 virtual void didReceiveData(); 89 virtual void didFinishLoading(); 90 virtual void didFail(FileError::ErrorCode); 91 92 DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart); 93 DEFINE_ATTRIBUTE_EVENT_LISTENER(progress); 94 DEFINE_ATTRIBUTE_EVENT_LISTENER(load); 95 DEFINE_ATTRIBUTE_EVENT_LISTENER(abort); 96 DEFINE_ATTRIBUTE_EVENT_LISTENER(error); 97 DEFINE_ATTRIBUTE_EVENT_LISTENER(loadend); 98 99private: 100 class ThrottlingController; 101 102 FileReader(ExecutionContext*); 103 104 void terminate(); 105 void readInternal(Blob*, FileReaderLoader::ReadType, ExceptionState&); 106 void fireErrorEvent(int httpStatusCode); 107 void fireEvent(const AtomicString& type); 108 109 static ThreadSpecific<ThrottlingController>& throttlingController(); 110 void executePendingRead(); 111 112 ReadyState m_state; 113 114 // Internal loading state, which could differ from ReadyState as it's 115 // for script-visible state while this one's for internal state. 116 enum LoadingState { 117 LoadingStateNone, 118 LoadingStatePending, 119 LoadingStateLoading, 120 LoadingStateAborted 121 }; 122 LoadingState m_loadingState; 123 124 RefPtr<Blob> m_blob; 125 FileReaderLoader::ReadType m_readType; 126 String m_encoding; 127 128 OwnPtr<FileReaderLoader> m_loader; 129 RefPtr<FileError> m_error; 130 double m_lastProgressNotificationTimeMS; 131}; 132 133} // namespace WebCore 134 135#endif // FileReader_h 136