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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
#include "bindings/v8/ScriptWrappable.h"
#include "core/dom/ActiveDOMObject.h"
#include "core/events/EventTarget.h"
#include "core/fileapi/FileError.h"
#include "core/fileapi/FileReaderLoader.h"
#include "core/fileapi/FileReaderLoaderClient.h"
#include "platform/heap/Handle.h"
#include "wtf/Forward.h"
#include "wtf/RefCounted.h"
#include "wtf/ThreadSpecific.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class Blob;
class ExceptionState;
class ExecutionContext;
class FileReader FINAL : public RefCountedWillBeRefCountedGarbageCollected<FileReader>, public ScriptWrappable, public ActiveDOMObject, public FileReaderLoaderClient, public EventTargetWithInlineData {
REFCOUNTED_EVENT_TARGET(FileReader);
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileReader);
public:
static PassRefPtrWillBeRawPtr<FileReader> create(ExecutionContext*);
virtual ~FileReader();
enum ReadyState {
EMPTY = 0,
LOADING = 1,
DONE = 2
};
void readAsArrayBuffer(Blob*, ExceptionState&);
void readAsBinaryString(Blob*, ExceptionState&);
void readAsText(Blob*, const String& encoding, ExceptionState&);
void readAsText(Blob*, ExceptionState&);
void readAsDataURL(Blob*, ExceptionState&);
void abort();
void doAbort();
ReadyState readyState() const { return m_state; }
PassRefPtrWillBeRawPtr<FileError> error() { return m_error; }
FileReaderLoader::ReadType readType() const { return m_readType; }
PassRefPtr<ArrayBuffer> arrayBufferResult() const;
String stringResult();
// ActiveDOMObject
virtual void stop() OVERRIDE;
// EventTarget
virtual const AtomicString& interfaceName() const OVERRIDE;
virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
// FileReaderLoaderClient
virtual void didStartLoading() OVERRIDE;
virtual void didReceiveData() OVERRIDE;
virtual void didFinishLoading() OVERRIDE;
virtual void didFail(FileError::ErrorCode) OVERRIDE;
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);
virtual void trace(Visitor*) OVERRIDE;
private:
class ThrottlingController;
FileReader(ExecutionContext*);
void terminate();
void readInternal(Blob*, FileReaderLoader::ReadType, ExceptionState&);
void fireErrorEvent(int httpStatusCode);
void fireEvent(const AtomicString& type);
static ThreadSpecific<ThrottlingController>& throttlingController();
void executePendingRead();
ReadyState m_state;
// Internal loading state, which could differ from ReadyState as it's
// for script-visible state while this one's for internal state.
enum LoadingState {
LoadingStateNone,
LoadingStatePending,
LoadingStateLoading,
LoadingStateAborted
};
LoadingState m_loadingState;
String m_blobType;
RefPtr<BlobDataHandle> m_blobDataHandle;
FileReaderLoader::ReadType m_readType;
String m_encoding;
OwnPtr<FileReaderLoader> m_loader;
RefPtrWillBeMember<FileError> m_error;
double m_lastProgressNotificationTimeMS;
};
} // namespace WebCore
#endif // FileReader_h
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