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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/core/v8/ActiveScriptWrappable.h"
#include "core/CoreExport.h"
#include "core/dom/ContextLifecycleObserver.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 <memory>
namespace blink {
class Blob;
class ExceptionState;
class ExecutionContext;
class StringOrArrayBuffer;
class CORE_EXPORT FileReader final : public EventTargetWithInlineData,
public ActiveScriptWrappable<FileReader>,
public ContextLifecycleObserver,
public FileReaderLoaderClient {
DEFINE_WRAPPERTYPEINFO();
USING_GARBAGE_COLLECTED_MIXIN(FileReader);
public:
static FileReader* create(ExecutionContext*);
~FileReader() override;
enum ReadyState { kEmpty = 0, kLoading = 1, kDone = 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();
ReadyState getReadyState() const { return m_state; }
DOMException* error() { return m_error; }
void result(StringOrArrayBuffer& resultAttribute) const;
// ContextLifecycleObserver
void contextDestroyed(ExecutionContext*) override;
// ScriptWrappable
bool hasPendingActivity() const final;
// EventTarget
const AtomicString& interfaceName() const override;
ExecutionContext* getExecutionContext() const override {
return ContextLifecycleObserver::getExecutionContext();
}
// FileReaderLoaderClient
void didStartLoading() override;
void didReceiveData() override;
void didFinishLoading() override;
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);
DECLARE_VIRTUAL_TRACE();
private:
class ThrottlingController;
explicit FileReader(ExecutionContext*);
void terminate();
void readInternal(Blob*, FileReaderLoader::ReadType, ExceptionState&);
void fireEvent(const AtomicString& type);
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;
bool m_stillFiringEvents;
String m_blobType;
RefPtr<BlobDataHandle> m_blobDataHandle;
FileReaderLoader::ReadType m_readType;
String m_encoding;
std::unique_ptr<FileReaderLoader> m_loader;
Member<DOMException> m_error;
double m_lastProgressNotificationTimeMS;
};
} // namespace blink
#endif // FileReader_h
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