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-rw-r--r--WebCore/html/FileReader.h172
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diff --git a/WebCore/html/FileReader.h b/WebCore/html/FileReader.h
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-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef FileReader_h
-#define FileReader_h
-
-#if ENABLE(BLOB)
-
-#include "ActiveDOMObject.h"
-#include "EventTarget.h"
-#include "FileError.h"
-#include "FileStreamClient.h"
-#include "PlatformString.h"
-#include "ScriptString.h"
-#include "TextEncoding.h"
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
-#include <wtf/RefPtr.h>
-#include <wtf/Vector.h>
-
-namespace WebCore {
-
-class Blob;
-class File;
-class FileStreamProxy;
-class ScriptExecutionContext;
-class TextResourceDecoder;
-
-class FileReader : public RefCounted<FileReader>, public ActiveDOMObject, public EventTarget, public FileStreamClient {
-public:
- static PassRefPtr<FileReader> create(ScriptExecutionContext* context)
- {
- return adoptRef(new FileReader(context));
- }
-
- virtual ~FileReader();
-
- enum ReadyState {
- EMPTY = 0,
- LOADING = 1,
- DONE = 2
- };
-
- void readAsBinaryString(Blob*);
- void readAsText(Blob*, const String& encoding = "");
- void readAsDataURL(File*);
- void abort();
-
- ReadyState readyState() const;
- PassRefPtr<FileError> error() { return m_error; }
- const ScriptString& result();
-
- // ActiveDOMObject
- virtual bool canSuspend() const;
- virtual void stop();
- virtual bool hasPendingActivity() const;
-
- // EventTarget
- virtual FileReader* toFileReader() { return this; }
- virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }
-
- // FileStreamClient
- virtual void didStart();
- virtual void didGetSize(long long);
- virtual void didOpen(bool);
- virtual void didRead(int);
-
- using RefCounted<FileReader>::ref;
- using RefCounted<FileReader>::deref;
-
- DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart);
- DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
- DEFINE_ATTRIBUTE_EVENT_LISTENER(load);
- DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
- DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
- DEFINE_ATTRIBUTE_EVENT_LISTENER(loadend);
-
-private:
- enum ReadType {
- ReadFileAsBinaryString,
- ReadFileAsText,
- ReadFileAsDataURL
- };
- enum InternalState {
- None,
- Starting,
- Opening,
- Reading,
- Completed
- };
-
- FileReader(ScriptExecutionContext*);
-
- // EventTarget
- virtual void refEventTarget() { ref(); }
- virtual void derefEventTarget() { deref(); }
- virtual EventTargetData* eventTargetData() { return &m_eventTargetData; }
- virtual EventTargetData* ensureEventTargetData() { return &m_eventTargetData; }
-
- void terminate();
- void readInternal(Blob*, ReadType);
- void fireEvent(const AtomicString& type);
- void convertToText();
- void convertToDataURL();
- void didFinish();
- void didFail(ExceptionCode);
-
- InternalState m_state;
- EventTargetData m_eventTargetData;
-
- RefPtr<Blob> m_fileBlob;
- ReadType m_readType;
- TextEncoding m_encoding;
-
- // Like XMLHttpRequest.m_responseText, we keep this as a ScriptString, not a WTF::String.
- // That's because these strings can easily get huge (they are filled from the file) and
- // because JS can easily observe many intermediate states, so it's very useful to be
- // able to share the buffer with JavaScript versions of the whole or partial string.
- // In contrast, this string doesn't interact much with the rest of the engine so it's not that
- // big a cost that it isn't a String.
- ScriptString m_result;
-
- // The raw data. We have to keep track of all the raw data for it to be converted to text or data URL data.
- Vector<char> m_rawData;
- bool m_isRawDataConverted;
-
- // The decoder used to decode the text data.
- RefPtr<TextResourceDecoder> m_decoder;
-
- // Needed to create data URL.
- String m_fileType;
-
- RefPtr<FileStreamProxy> m_streamProxy;
- Vector<char> m_buffer;
- RefPtr<FileError> m_error;
- long long m_bytesLoaded;
- long long m_totalBytes;
- double m_lastProgressNotificationTimeMS;
-};
-
-} // namespace WebCore
-
-#endif // ENABLE(BLOB)
-
-#endif // FileReader_h