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#pragma once
32
33#include "ActiveDOMObject.h"
34#include "EventTarget.h"
35#include "ExceptionOr.h"
36#include "FileError.h"
37#include "FileReaderLoader.h"
38#include "FileReaderLoaderClient.h"
39
40namespace JSC {
41class ArrayBuffer;
42}
43
44namespace WebCore {
45
46class Blob;
47
48class FileReader final : public RefCounted<FileReader>, public ActiveDOMObject, public EventTargetWithInlineData, private FileReaderLoaderClient {
49 WTF_MAKE_ISO_ALLOCATED(FileReader);
50public:
51 static Ref<FileReader> create(ScriptExecutionContext&);
52
53 virtual ~FileReader();
54
55 enum ReadyState {
56 EMPTY = 0,
57 LOADING = 1,
58 DONE = 2
59 };
60
61 ExceptionOr<void> readAsArrayBuffer(Blob*);
62 ExceptionOr<void> readAsBinaryString(Blob*);
63 ExceptionOr<void> readAsText(Blob*, const String& encoding);
64 ExceptionOr<void> readAsDataURL(Blob*);
65 void abort();
66
67 void doAbort();
68
69 ReadyState readyState() const { return m_state; }
70 RefPtr<FileError> error() { return m_error; }
71 FileReaderLoader::ReadType readType() const { return m_readType; }
72 Optional<Variant<String, RefPtr<JSC::ArrayBuffer>>> result() const;
73
74 using RefCounted::ref;
75 using RefCounted::deref;
76
77private:
78 explicit FileReader(ScriptExecutionContext&);
79
80 const char* activeDOMObjectName() const final;
81 bool canSuspendForDocumentSuspension() const final;
82 void stop() final;
83
84 EventTargetInterface eventTargetInterface() const final { return FileReaderEventTargetInterfaceType; }
85 ScriptExecutionContext* scriptExecutionContext() const final { return ActiveDOMObject::scriptExecutionContext(); }
86 void refEventTarget() final { ref(); }
87 void derefEventTarget() final { deref(); }
88
89 void didStartLoading() final;
90 void didReceiveData() final;
91 void didFinishLoading() final;
92 void didFail(int errorCode) final;
93
94 ExceptionOr<void> readInternal(Blob&, FileReaderLoader::ReadType);
95 void fireErrorEvent(int httpStatusCode);
96 void fireEvent(const AtomicString& type);
97
98 ReadyState m_state { EMPTY };
99 bool m_aborting { false };
100 RefPtr<Blob> m_blob;
101 FileReaderLoader::ReadType m_readType { FileReaderLoader::ReadAsBinaryString };
102 String m_encoding;
103 std::unique_ptr<FileReaderLoader> m_loader;
104 RefPtr<FileError> m_error;
105 MonotonicTime m_lastProgressNotificationTime { MonotonicTime::nan() };
106 RefPtr<PendingActivity<FileReader>> m_loadingActivity;
107};
108
109} // namespace WebCore
110