content/shell/browser/shell_download_manager_delegate.cc

// Copyright 2013 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 "content/shell/browser/shell_download_manager_delegate.h"

#include <string>

#if defined(OS_WIN)
#include <windows.h>
#include <commdlg.h>
#endif

#include "base/bind.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/notreached.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/thread_pool.h"
#include "build/build_config.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/download_item_utils.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/web_contents.h"
#include "content/shell/common/shell_switches.h"
#include "net/base/filename_util.h"

#if defined(OS_WIN)
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#endif

namespace content {

ShellDownloadManagerDelegate::ShellDownloadManagerDelegate()
    : download_manager_(nullptr), suppress_prompting_(false) {}

ShellDownloadManagerDelegate::~ShellDownloadManagerDelegate() {
  if (download_manager_) {
    download_manager_->SetDelegate(nullptr);
    download_manager_ = nullptr;
  }
}


void ShellDownloadManagerDelegate::SetDownloadManager(
    DownloadManager* download_manager) {
  download_manager_ = download_manager;
}

void ShellDownloadManagerDelegate::Shutdown() {
  // Revoke any pending callbacks. download_manager_ et. al. are no longer safe
  // to access after this point.
  weak_ptr_factory_.InvalidateWeakPtrs();
  download_manager_ = nullptr;
}

bool ShellDownloadManagerDelegate::DetermineDownloadTarget(
    download::DownloadItem* download,
    DownloadTargetCallback* callback) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  // This assignment needs to be here because even at the call to
  // SetDownloadManager, the system is not fully initialized.
  if (default_download_path_.empty()) {
    default_download_path_ = download_manager_->GetBrowserContext()->GetPath().
        Append(FILE_PATH_LITERAL("Downloads"));
  }

  if (!download->GetForcedFilePath().empty()) {
    std::move(*callback).Run(
        download->GetForcedFilePath(),
        download::DownloadItem::TARGET_DISPOSITION_OVERWRITE,
        download::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS,