1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* 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 THIRD_PARTY_BLINK_RENDERER_CORE_FILEAPI_FILE_READER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_FILEAPI_FILE_READER_H_
#include "base/timer/elapsed_timer.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/fileapi/file_error.h"
#include "third_party/blink/renderer/core/fileapi/file_read_type.h"
#include "third_party/blink/renderer/core/fileapi/file_reader_client.h"
#include "third_party/blink/renderer/core/fileapi/file_reader_loader.h"
#include "third_party/blink/renderer/core/probe/async_task_context.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
namespace blink {
class Blob;
class ExceptionState;
class ExecutionContext;
class V8UnionArrayBufferOrString;
enum class FileErrorCode;
class CORE_EXPORT FileReader final : public EventTarget,
public ActiveScriptWrappable<FileReader>,
public ExecutionContextLifecycleObserver,
public FileReaderAccumulator {
DEFINE_WRAPPERTYPEINFO();
public:
static FileReader* Create(ExecutionContext*);
explicit FileReader(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 state_; }
DOMException* error() { return error_.Get(); }
V8UnionArrayBufferOrString* result() const;
probe::AsyncTaskContext* async_task_context() { return &async_task_context_; }
// ExecutionContextLifecycleObserver
void ContextDestroyed() override;
// ScriptWrappable
bool HasPendingActivity() const final;
// EventTarget
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override {
return ExecutionContextLifecycleObserver::GetExecutionContext();
}
// FileReaderClient
FileErrorCode DidStartLoading() override;
FileErrorCode DidReceiveData() override;
void DidFinishLoading(FileReaderData contents) override;
void DidFail(FileErrorCode) override;
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart, kLoadstart)
DEFINE_ATTRIBUTE_EVENT_LISTENER(progress, kProgress)
DEFINE_ATTRIBUTE_EVENT_LISTENER(load, kLoad)
DEFINE_ATTRIBUTE_EVENT_LISTENER(abort, kAbort)
DEFINE_ATTRIBUTE_EVENT_LISTENER(error, kError)
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadend, kLoadend)
void Trace(Visitor*) const override;
private:
class ThrottlingController;
void Terminate();
void ReadInternal(Blob*, FileReadType, ExceptionState&);
void FireEvent(const AtomicString& type);
void ExecutePendingRead();
ReadyState 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 {
kLoadingStateNone,
kLoadingStatePending,
kLoadingStateLoading,
kLoadingStateAborted
};
LoadingState loading_state_;
bool still_firing_events_;
String blob_type_;
scoped_refptr<BlobDataHandle> blob_data_handle_;
FileReadType read_type_;
String encoding_;
probe::AsyncTaskContext async_task_context_;
Member<FileReaderLoader> loader_;
Member<V8UnionArrayBufferOrString> result_ = nullptr;
Member<DOMException> error_;
std::optional<base::ElapsedTimer> last_progress_notification_time_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_FILEAPI_FILE_READER_H_
|
