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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_FileReader_h
#define mozilla_dom_FileReader_h
#include "mozilla/Attributes.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "nsIAsyncInputStream.h"
#include "nsIInterfaceRequestor.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsWeakReference.h"
#include "WorkerHolder.h"
#define NS_PROGRESS_EVENT_INTERVAL 50
class nsITimer;
class nsIEventTarget;
namespace mozilla {
namespace dom {
class Blob;
class DOMError;
namespace workers {
class WorkerPrivate;
}
extern const uint64_t kUnknownSize;
class FileReaderDecreaseBusyCounter;
class FileReader final : public DOMEventTargetHelper,
public nsIInterfaceRequestor,
public nsSupportsWeakReference,
public nsIInputStreamCallback,
public nsITimerCallback,
public workers::WorkerHolder
{
friend class FileReaderDecreaseBusyCounter;
public:
FileReader(nsIGlobalObject* aGlobal,
workers::WorkerPrivate* aWorkerPrivate);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSITIMERCALLBACK
NS_DECL_NSIINPUTSTREAMCALLBACK
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(FileReader,
DOMEventTargetHelper)
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
// WebIDL
static already_AddRefed<FileReader>
Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
void ReadAsArrayBuffer(JSContext* aCx, Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_ARRAYBUFFER, aRv);
}
void ReadAsText(Blob& aBlob, const nsAString& aLabel, ErrorResult& aRv)
{
ReadFileContent(aBlob, aLabel, FILE_AS_TEXT, aRv);
}
void ReadAsDataURL(Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_DATAURL, aRv);
}
void Abort(ErrorResult& aRv);
uint16_t ReadyState() const
{
return static_cast<uint16_t>(mReadyState);
}
DOMError* GetError() const
{
return mError;
}
void GetResult(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
ErrorResult& aRv);
IMPL_EVENT_HANDLER(loadstart)
IMPL_EVENT_HANDLER(progress)
IMPL_EVENT_HANDLER(load)
IMPL_EVENT_HANDLER(abort)
IMPL_EVENT_HANDLER(error)
IMPL_EVENT_HANDLER(loadend)
void ReadAsBinaryString(Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_BINARY, aRv);
}
// WorkerHolder
bool Notify(workers::Status) override;
private:
virtual ~FileReader();
// This must be in sync with dom/webidl/FileReader.webidl
enum eReadyState {
EMPTY = 0,
LOADING = 1,
DONE = 2
};
enum eDataFormat {
FILE_AS_ARRAYBUFFER,
FILE_AS_BINARY,
FILE_AS_TEXT,
FILE_AS_DATAURL
};
void RootResultArrayBuffer();
void ReadFileContent(Blob& aBlob,
const nsAString &aCharset, eDataFormat aDataFormat,
ErrorResult& aRv);
nsresult GetAsText(Blob *aBlob, const nsACString &aCharset,
const char *aFileData, uint32_t aDataLen,
nsAString &aResult);
nsresult GetAsDataURL(Blob *aBlob, const char *aFileData,
uint32_t aDataLen, nsAString &aResult);
nsresult OnLoadEnd(nsresult aStatus);
void StartProgressEventTimer();
void ClearProgressEventTimer();
void FreeDataAndDispatchSuccess();
void FreeDataAndDispatchError();
void FreeDataAndDispatchError(nsresult aRv);
nsresult DispatchProgressEvent(const nsAString& aType);
nsresult DoAsyncWait();
nsresult DoReadData(uint64_t aCount);
void OnLoadEndArrayBuffer();
void FreeFileData()
{
free(mFileData);
mFileData = nullptr;
mDataLen = 0;
}
nsresult IncreaseBusyCounter();
void DecreaseBusyCounter();
void Shutdown();
char *mFileData;
RefPtr<Blob> mBlob;
nsCString mCharset;
uint32_t mDataLen;
eDataFormat mDataFormat;
nsString mResult;
JS::Heap<JSObject*> mResultArrayBuffer;
nsCOMPtr<nsITimer> mProgressNotifier;
bool mProgressEventWasDelayed;
bool mTimerIsActive;
nsCOMPtr<nsIAsyncInputStream> mAsyncStream;
RefPtr<DOMError> mError;
eReadyState mReadyState;
uint64_t mTotal;
uint64_t mTransferred;
nsCOMPtr<nsIEventTarget> mTarget;
uint64_t mBusyCount;
// Kept alive with a WorkerHolder.
workers::WorkerPrivate* mWorkerPrivate;
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_FileReader_h
|
