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// Copyright (c) 2009 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_win.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/download/download_manager.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/tab_contents/tab_contents.h"
DragDownloadFile::DragDownloadFile(
const GURL& url,
const GURL& referrer,
const std::string& referrer_encoding,
TabContents* tab_contents)
: url_(url),
referrer_(referrer),
referrer_encoding_(referrer_encoding),
tab_contents_(tab_contents),
drag_message_loop_(MessageLoop::current()),
is_started_(false),
is_running_nested_message_loop_(false),
initiate_download_result_(false),
format_(0),
download_manager_(NULL),
download_item_observer_added_(false) {
}
DragDownloadFile::~DragDownloadFile() {
DCHECK(drag_message_loop_ == MessageLoop::current());
// 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 (!dir_path_.empty()) {
if (!file_path_.empty())
file_util::DeleteAfterReboot(file_path_);
file_util::DeleteAfterReboot(dir_path_);
}
#endif
if (download_manager_)
download_manager_->RemoveObserver(this);
}
bool DragDownloadFile::Start(OSExchangeData::DownloadFileObserver* observer,
int format) {
DCHECK(drag_message_loop_ == MessageLoop::current());
if (is_started_)
return true;
is_started_ = true;
DCHECK(!observer_.get());
observer_ = observer;
format_ = format;
if (!InitiateDownload())
return false;
// Wait till the download is fully initiated.
StartNestedMessageLoop();
return initiate_download_result_;
}
void DragDownloadFile::Stop() {
}
bool DragDownloadFile::InitiateDownload() {
DCHECK(drag_message_loop_ == MessageLoop::current());
// 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"),
&dir_path_))
return false;
// DownloadManager could only be invoked from the UI thread.
ChromeThread::PostTask(
ChromeThread::UI, FROM_HERE,
NewRunnableMethod(this,
&DragDownloadFile::OnInitiateDownload,
dir_path_));
return true;
}
void DragDownloadFile::OnInitiateDownload(const FilePath& dir_path) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
download_manager_ = tab_contents_->profile()->GetDownloadManager();
download_manager_->AddObserver(this);
// Start the download.
download_manager_->DownloadUrlToFile(url_,
referrer_,
referrer_encoding_,
dir_path,
tab_contents_);
}
void DragDownloadFile::InitiateDownloadSucceeded(
const std::vector<OSExchangeData::DownloadFileInfo*>& downloads) {
DCHECK(drag_message_loop_ == MessageLoop::current());
// Notify the drag-and-drop observer about the file info.
DCHECK(observer_);
observer_->OnDataReady(format_, downloads);
InitiateDownloadCompleted(true);
}
void DragDownloadFile::InitiateDownloadFailed() {
DCHECK(drag_message_loop_ == MessageLoop::current());
InitiateDownloadCompleted(false);
}
void DragDownloadFile::InitiateDownloadCompleted(bool result) {
DCHECK(drag_message_loop_ == MessageLoop::current());
// Release the observer since we do not need it any more.
observer_ = NULL;
initiate_download_result_ = result;
QuitNestedMessageLoopIfNeeded();
}
void DragDownloadFile::StartNestedMessageLoop() {
DCHECK(drag_message_loop_ == MessageLoop::current());
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::QuitNestedMessageLoopIfNeeded() {
DCHECK(drag_message_loop_ == MessageLoop::current());
if (is_running_nested_message_loop_) {
is_running_nested_message_loop_ = false;
MessageLoop::current()->Quit();
}
}
void DragDownloadFile::ModelChanged() {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
download_manager_->GetTemporaryDownloads(this, dir_path_);
}
void DragDownloadFile::SetDownloads(std::vector<DownloadItem*>& downloads) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
std::vector<DownloadItem*>::const_iterator it = downloads.begin();
for (; it != downloads.end(); ++it) {
if (!download_item_observer_added_ && (*it)->url() == url_) {
download_item_observer_added_ = true;
(*it)->AddObserver(this);
}
}
}
void DragDownloadFile::OnDownloadUpdated(DownloadItem* download) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
if (download->state() == DownloadItem::CANCELLED) {
download->RemoveObserver(this);
download_manager_->RemoveObserver(this);
drag_message_loop_->PostTask(
FROM_HERE,
NewRunnableMethod(this,
&DragDownloadFile::DownloadCancelled));
}
}
void DragDownloadFile::OnDownloadFileCompleted(DownloadItem* download) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
DCHECK(download->state() == DownloadItem::COMPLETE);
download->RemoveObserver(this);
download_manager_->RemoveObserver(this);
drag_message_loop_->PostTask(
FROM_HERE,
NewRunnableMethod(this,
&DragDownloadFile::DownloadCompleted,
download->full_path()));
}
void DragDownloadFile::DownloadCancelled() {
DCHECK(drag_message_loop_ == MessageLoop::current());
InitiateDownloadFailed();
}
void DragDownloadFile::DownloadCompleted(const FilePath& file_path) {
DCHECK(drag_message_loop_ == MessageLoop::current());
file_path_ = file_path;
// The download has been successfully initiated.
std::vector<OSExchangeData::DownloadFileInfo*> downloads;
downloads.push_back(
new OSExchangeData::DownloadFileInfo(file_path, 0, NULL));
InitiateDownloadSucceeded(downloads);
}
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