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
202
203
204
205
206
207
208
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_GetFilesHelper_h
#define mozilla_dom_GetFilesHelper_h
#include "mozilla/Mutex.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/File.h"
#include "nsClassHashtable.h"
#include "nsCycleCollectionTraversalCallback.h"
#include "nsTArray.h"
#include "nsTHashtable.h"
#include "nsThreadUtils.h"
class nsIGlobalObject;
namespace mozilla {
namespace dom {
class BlobImpl;
class ContentParent;
class File;
class GetFilesHelperParent;
class OwningFileOrDirectory;
class Promise;
class GetFilesCallback
{
public:
NS_INLINE_DECL_REFCOUNTING(GetFilesCallback);
virtual void
Callback(nsresult aStatus, const Sequence<RefPtr<File>>& aFiles) = 0;
protected:
virtual ~GetFilesCallback() {}
};
class GetFilesHelperBase
{
protected:
explicit GetFilesHelperBase(bool aRecursiveFlag)
: mRecursiveFlag(aRecursiveFlag)
{}
virtual ~GetFilesHelperBase() {}
virtual bool
IsCanceled()
{
return false;
}
nsresult
ExploreDirectory(const nsAString& aDOMPath, nsIFile* aFile);
nsresult
AddExploredDirectory(nsIFile* aDirectory);
bool
ShouldFollowSymLink(nsIFile* aDirectory);
bool mRecursiveFlag;
// We populate this array in the I/O thread with the BlobImpl.
FallibleTArray<RefPtr<BlobImpl>> mTargetBlobImplArray;
nsTHashtable<nsCStringHashKey> mExploredDirectories;
};
// Retrieving the list of files can be very time/IO consuming. We use this
// helper class to do it just once.
class GetFilesHelper : public Runnable
, public GetFilesHelperBase
{
friend class GetFilesHelperParent;
public:
static already_AddRefed<GetFilesHelper>
Create(nsIGlobalObject* aGlobal,
const nsTArray<OwningFileOrDirectory>& aFilesOrDirectory,
bool aRecursiveFlag, ErrorResult& aRv);
void
AddPromise(Promise* aPromise);
void
AddCallback(GetFilesCallback* aCallback);
// CC methods
void Unlink();
void Traverse(nsCycleCollectionTraversalCallback &cb);
protected:
GetFilesHelper(nsIGlobalObject* aGlobal, bool aRecursiveFlag);
virtual ~GetFilesHelper();
void
SetDirectoryPath(const nsAString& aDirectoryPath)
{
mDirectoryPath = aDirectoryPath;
}
virtual bool
IsCanceled() override
{
MutexAutoLock lock(mMutex);
return mCanceled;
}
virtual void
Work(ErrorResult& aRv);
virtual void
Cancel() {};
NS_IMETHOD
Run() override;
void
RunIO();
void
RunMainThread();
void
OperationCompleted();
void
ResolveOrRejectPromise(Promise* aPromise);
void
RunCallback(GetFilesCallback* aCallback);
nsCOMPtr<nsIGlobalObject> mGlobal;
bool mListingCompleted;
nsString mDirectoryPath;
// This is the real File sequence that we expose via Promises.
Sequence<RefPtr<File>> mFiles;
// Error code to propagate.
nsresult mErrorResult;
nsTArray<RefPtr<Promise>> mPromises;
nsTArray<RefPtr<GetFilesCallback>> mCallbacks;
Mutex mMutex;
// This variable is protected by mutex.
bool mCanceled;
};
class GetFilesHelperChild final : public GetFilesHelper
{
public:
GetFilesHelperChild(nsIGlobalObject* aGlobal, bool aRecursiveFlag)
: GetFilesHelper(aGlobal, aRecursiveFlag)
, mPendingOperation(false)
{}
virtual void
Work(ErrorResult& aRv) override;
virtual void
Cancel() override;
bool
AppendBlobImpl(BlobImpl* aBlobImpl);
void
Finished(nsresult aResult);
private:
nsID mUUID;
bool mPendingOperation;
};
class GetFilesHelperParentCallback;
class GetFilesHelperParent final : public GetFilesHelper
{
friend class GetFilesHelperParentCallback;
public:
static already_AddRefed<GetFilesHelperParent>
Create(const nsID& aUUID, const nsAString& aDirectoryPath,
bool aRecursiveFlag, ContentParent* aContentParent, ErrorResult& aRv);
private:
GetFilesHelperParent(const nsID& aUUID, ContentParent* aContentParent,
bool aRecursiveFlag);
~GetFilesHelperParent();
RefPtr<ContentParent> mContentParent;
nsID mUUID;
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_GetFilesHelper_h
|
