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 "core/dom/ActiveDOMObject.h" 35#include "core/events/EventTarget.h" 36#include "core/fileapi/FileError.h" 37#include "core/fileapi/FileReaderLoader.h" 38#include "core/fileapi/FileReaderLoaderClient.h" 39#include "platform/heap/Handle.h" 40#include "wtf/Forward.h" 41#include "wtf/RefCounted.h" 42#include "wtf/text/WTFString.h" 43 44namespace blink { 45 46class Blob; 47class ExceptionState; 48class ExecutionContext; 49 50class FileReader FINAL : public RefCountedWillBeGarbageCollectedFinalized<FileReader>, public ActiveDOMObject, public FileReaderLoaderClient, public EventTargetWithInlineData { 51 DEFINE_WRAPPERTYPEINFO(); 52 REFCOUNTED_EVENT_TARGET(FileReader); 53 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileReader); 54public: 55 static PassRefPtrWillBeRawPtr<FileReader> create(ExecutionContext*); 56 57 virtual ~FileReader(); 58 59 enum ReadyState { 60 EMPTY = 0, 61 LOADING = 1, 62 DONE = 2 63 }; 64 65 void readAsArrayBuffer(Blob*, ExceptionState&); 66 void readAsBinaryString(Blob*, ExceptionState&); 67 void readAsText(Blob*, const String& encoding, ExceptionState&); 68 void readAsText(Blob*, ExceptionState&); 69 void readAsDataURL(Blob*, ExceptionState&); 70 void abort(); 71 72 void doAbort(); 73 74 ReadyState readyState() const { return m_state; } 75 PassRefPtrWillBeRawPtr<FileError> error() { return m_error; } 76 FileReaderLoader::ReadType readType() const { return m_readType; } 77 PassRefPtr<ArrayBuffer> arrayBufferResult() const; 78 String stringResult(); 79 80 // ActiveDOMObject 81 virtual void stop() OVERRIDE; 82 virtual bool hasPendingActivity() const OVERRIDE; 83 84 // EventTarget 85 virtual const AtomicString& interfaceName() const OVERRIDE; 86 virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); } 87 88 // FileReaderLoaderClient 89 virtual void didStartLoading() OVERRIDE; 90 virtual void didReceiveData() OVERRIDE; 91 virtual void didFinishLoading() OVERRIDE; 92 virtual void didFail(FileError::ErrorCode) OVERRIDE; 93 94 DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart); 95 DEFINE_ATTRIBUTE_EVENT_LISTENER(progress); 96 DEFINE_ATTRIBUTE_EVENT_LISTENER(load); 97 DEFINE_ATTRIBUTE_EVENT_LISTENER(abort); 98 DEFINE_ATTRIBUTE_EVENT_LISTENER(error); 99 DEFINE_ATTRIBUTE_EVENT_LISTENER(loadend); 100 101 virtual void trace(Visitor*) OVERRIDE; 102 103private: 104 explicit FileReader(ExecutionContext*); 105 106 class ThrottlingController; 107 108 void terminate(); 109 void readInternal(Blob*, FileReaderLoader::ReadType, ExceptionState&); 110 void fireEvent(const AtomicString& type); 111 112 void executePendingRead(); 113 114 ReadyState m_state; 115 116 // Internal loading state, which could differ from ReadyState as it's 117 // for script-visible state while this one's for internal state. 118 enum LoadingState { 119 LoadingStateNone, 120 LoadingStatePending, 121 LoadingStateLoading, 122 LoadingStateAborted 123 }; 124 LoadingState m_loadingState; 125 126 String m_blobType; 127 RefPtr<BlobDataHandle> m_blobDataHandle; 128 FileReaderLoader::ReadType m_readType; 129 String m_encoding; 130 131 OwnPtr<FileReaderLoader> m_loader; 132 RefPtrWillBeMember<FileError> m_error; 133 double m_lastProgressNotificationTimeMS; 134 int m_asyncOperationId; 135}; 136 137} // namespace blink 138 139#endif // FileReader_h 140