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
209
210
211
212
213
214
215
216
217
218
219
|
// Copyright (c) 2009-2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/download/drag_download_file.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/download/download_file.h"
#include "chrome/browser/download/download_item.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "net/base/file_stream.h"
DragDownloadFile::DragDownloadFile(
const FilePath& file_name_or_path,
linked_ptr<net::FileStream> file_stream,
const GURL& url,
const GURL& referrer,
const std::string& referrer_encoding,
TabContents* tab_contents)
: file_stream_(file_stream),
url_(url),
referrer_(referrer),
referrer_encoding_(referrer_encoding),
tab_contents_(tab_contents),
drag_message_loop_(MessageLoop::current()),
is_started_(false),
is_successful_(false),
download_manager_(NULL),
download_item_observer_added_(false) {
#if defined(OS_WIN)
DCHECK(!file_name_or_path.empty() && !file_stream.get());
file_name_ = file_name_or_path;
#elif defined(OS_POSIX)
DCHECK(!file_name_or_path.empty() && file_stream.get());
file_path_ = file_name_or_path;
#endif
}
DragDownloadFile::~DragDownloadFile() {
AssertCurrentlyOnDragThread();
// Since the target application can still hold and use the dragged file,
// we do not know the time that it can be safely deleted. To solve this
// problem, we schedule it to be removed after the system is restarted.
#if defined(OS_WIN)
if (!temp_dir_path_.empty()) {
if (!file_path_.empty())
file_util::DeleteAfterReboot(file_path_);
file_util::DeleteAfterReboot(temp_dir_path_);
}
#endif
if (download_manager_)
download_manager_->RemoveObserver(this);
}
bool DragDownloadFile::Start(DownloadFileObserver* observer) {
AssertCurrentlyOnDragThread();
if (is_started_)
return true;
is_started_ = true;
DCHECK(!observer_.get());
observer_ = observer;
if (!file_stream_.get()) {
// Create a temporary directory to save the temporary download file. We do
// not want to use the default download directory since we do not want the
// twisted file name shown in the download shelf if the file with the same
// name already exists.
if (!file_util::CreateNewTempDirectory(FILE_PATH_LITERAL("chrome"),
&temp_dir_path_))
return false;
file_path_ = temp_dir_path_.Append(file_name_);
}
InitiateDownload();
// On Windows, we need to wait till the download file is completed.
#if defined(OS_WIN)
StartNestedMessageLoop();
#endif
return is_successful_;
}
void DragDownloadFile::Stop() {
}
void DragDownloadFile::InitiateDownload() {
#if defined(OS_WIN)
// DownloadManager could only be invoked from the UI thread.
if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
NewRunnableMethod(this,
&DragDownloadFile::InitiateDownload));
return;
}
#endif
download_manager_ = tab_contents_->profile()->GetDownloadManager();
download_manager_->AddObserver(this);
DownloadSaveInfo save_info;
save_info.file_path = file_path_;
save_info.file_stream = file_stream_;
download_manager_->DownloadUrlToFile(url_,
referrer_,
referrer_encoding_,
save_info,
tab_contents_);
}
void DragDownloadFile::DownloadCompleted(bool is_successful) {
#if defined(OS_WIN)
// If not in drag-and-drop thread, defer the running to it.
if (drag_message_loop_ != MessageLoop::current()) {
drag_message_loop_->PostTask(
FROM_HERE,
NewRunnableMethod(this,
&DragDownloadFile::DownloadCompleted,
is_successful));
return;
}
#endif
is_successful_ = is_successful;
// Call the observer.
DCHECK(observer_);
if (is_successful)
observer_->OnDownloadCompleted(file_path_);
else
observer_->OnDownloadAborted();
// Release the observer since we do not need it any more.
observer_ = NULL;
// On Windows, we need to stop the waiting.
#if defined(OS_WIN)
QuitNestedMessageLoop();
#endif
}
void DragDownloadFile::ModelChanged() {
AssertCurrentlyOnUIThread();
std::vector<DownloadItem*> downloads;
download_manager_->GetTemporaryDownloads(file_path_.DirName(), &downloads);
for (std::vector<DownloadItem*>::const_iterator i = downloads.begin();
i != downloads.end(); ++i) {
if (!download_item_observer_added_ && (*i)->url() == url_) {
download_item_observer_added_ = true;
(*i)->AddObserver(this);
}
}
}
void DragDownloadFile::OnDownloadUpdated(DownloadItem* download) {
AssertCurrentlyOnUIThread();
if (download->state() == DownloadItem::CANCELLED) {
download->RemoveObserver(this);
download_manager_->RemoveObserver(this);
DownloadCompleted(false);
}
}
void DragDownloadFile::OnDownloadFileCompleted(DownloadItem* download) {
AssertCurrentlyOnUIThread();
DCHECK(download->state() == DownloadItem::COMPLETE);
download->RemoveObserver(this);
download_manager_->RemoveObserver(this);
DownloadCompleted(true);
}
void DragDownloadFile::AssertCurrentlyOnDragThread() {
// Only do the check on Windows where two threads are involved.
#if defined(OS_WIN)
DCHECK(drag_message_loop_ == MessageLoop::current());
#endif
}
void DragDownloadFile::AssertCurrentlyOnUIThread() {
// Only do the check on Windows where two threads are involved.
#if defined(OS_WIN)
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
#endif
}
#if defined(OS_WIN)
void DragDownloadFile::StartNestedMessageLoop() {
AssertCurrentlyOnDragThread();
bool old_state = MessageLoop::current()->NestableTasksAllowed();
MessageLoop::current()->SetNestableTasksAllowed(true);
is_running_nested_message_loop_ = true;
MessageLoop::current()->Run();
MessageLoop::current()->SetNestableTasksAllowed(old_state);
}
void DragDownloadFile::QuitNestedMessageLoop() {
AssertCurrentlyOnDragThread();
if (is_running_nested_message_loop_) {
is_running_nested_message_loop_ = false;
MessageLoop::current()->Quit();
}
}
#endif
|
