content/shell/browser/shell_download_manager_delegate.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/shell/browser/shell_download_manager_delegate.h"
   6
   7 #if defined(OS_WIN)
   8 #include <windows.h>
   9 #include <commdlg.h>
  10 #endif
  11
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/files/file_util.h"
  15 #include "base/logging.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "content/public/browser/browser_context.h"
  19 #include "content/public/browser/browser_thread.h"
  20 #include "content/public/browser/download_manager.h"
  21 #include "content/public/browser/web_contents.h"
  22 #include "content/shell/common/shell_switches.h"
  23 #include "net/base/filename_util.h"
  24
  25 #if defined(OS_WIN)
  26 #include "ui/aura/window.h"
  27 #include "ui/aura/window_tree_host.h"
  28 #endif
  29
  30 namespace content {
  31
  32 ShellDownloadManagerDelegate::ShellDownloadManagerDelegate()
  33     : download_manager_(NULL),
  34       suppress_prompting_(false),
  35       weak_ptr_factory_(this) {}
  36
  37 ShellDownloadManagerDelegate::~ShellDownloadManagerDelegate(){
  38   if (download_manager_) {
  39     DCHECK_EQ(static_cast<DownloadManagerDelegate*>(this),
  40               download_manager_->GetDelegate());
  41     download_manager_->SetDelegate(NULL);
  42     download_manager_ = NULL;
  43   }
  44 }
  45
  46
  47 void ShellDownloadManagerDelegate::SetDownloadManager(
  48     DownloadManager* download_manager) {
  49   download_manager_ = download_manager;
  50 }
  51
  52 void ShellDownloadManagerDelegate::Shutdown() {
  53   // Revoke any pending callbacks. download_manager_ et. al. are no longer safe
  54   // to access after this point.
  55   weak_ptr_factory_.InvalidateWeakPtrs();
  56   download_manager_ = NULL;
  57 }
  58
  59 bool ShellDownloadManagerDelegate::DetermineDownloadTarget(
  60     DownloadItem* download,
  61     const DownloadTargetCallback& callback) {
  62   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  63   // This assignment needs to be here because even at the call to
  64   // SetDownloadManager, the system is not fully initialized.
  65   if (default_download_path_.empty()) {
  66     default_download_path_ = download_manager_->GetBrowserContext()->GetPath().
  67         Append(FILE_PATH_LITERAL("Downloads"));
  68   }
  69
  70   if (!download->GetForcedFilePath().empty()) {
  71     callback.Run(download->GetForcedFilePath(),
  72                  DownloadItem::TARGET_DISPOSITION_OVERWRITE,
  73                  DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS,
  74                  download->GetForcedFilePath());
  75     return true;
  76   }
  77
  78   FilenameDeterminedCallback filename_determined_callback =
  79       base::Bind(&ShellDownloadManagerDelegate::OnDownloadPathGenerated,
  80                  weak_ptr_factory_.GetWeakPtr(),
  81                  download->GetId(),
  82                  callback);
  83
  84   BrowserThread::PostTask(
  85       BrowserThread::FILE,
  86       FROM_HERE,
  87       base::Bind(&ShellDownloadManagerDelegate::GenerateFilename,
  88                  download->GetURL(),
  89                  download->GetContentDisposition(),
  90                  download->GetSuggestedFilename(),
  91                  download->GetMimeType(),
  92                  default_download_path_,
  93                  filename_determined_callback));
  94   return true;
  95 }
  96
  97 bool ShellDownloadManagerDelegate::ShouldOpenDownload(
  98       DownloadItem* item,
  99       const DownloadOpenDelayedCallback& callback) {
 100   return true;
 101 }
 102
 103 void ShellDownloadManagerDelegate::GetNextId(
 104     const DownloadIdCallback& callback) {
 105   static uint32 next_id = DownloadItem::kInvalidId + 1;
 106   callback.Run(next_id++);
 107 }
 108
 109 // static
 110 void ShellDownloadManagerDelegate::GenerateFilename(
 111     const GURL& url,
 112     const std::string& content_disposition,
 113     const std::string& suggested_filename,
 114     const std::string& mime_type,
 115     const base::FilePath& suggested_directory,
 116     const FilenameDeterminedCallback& callback) {
 117   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 118   base::FilePath generated_name = net::GenerateFileName(url,
 119                                                         content_disposition,
 120                                                         std::string(),
 121                                                         suggested_filename,
 122                                                         mime_type,
 123                                                         "download");
 124
 125   if (!base::PathExists(suggested_directory))
 126     base::CreateDirectory(suggested_directory);
 127
 128   base::FilePath suggested_path(suggested_directory.Append(generated_name));
 129   BrowserThread::PostTask(
 130       BrowserThread::UI, FROM_HERE, base::Bind(callback, suggested_path));
 131 }
 132
 133 void ShellDownloadManagerDelegate::OnDownloadPathGenerated(
 134     uint32 download_id,
 135     const DownloadTargetCallback& callback,
 136     const base::FilePath& suggested_path) {
 137   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 138   if (suppress_prompting_) {
 139     // Testing exit.
 140     callback.Run(suggested_path, DownloadItem::TARGET_DISPOSITION_OVERWRITE,
 141                  DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS,
 142                  suggested_path.AddExtension(FILE_PATH_LITERAL(".crdownload")));
 143     return;
 144   }
 145
 146   ChooseDownloadPath(download_id, callback, suggested_path);
 147 }
 148
 149 void ShellDownloadManagerDelegate::ChooseDownloadPath(
 150     uint32 download_id,
 151     const DownloadTargetCallback& callback,
 152     const base::FilePath& suggested_path) {
 153   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 154   DownloadItem* item = download_manager_->GetDownload(download_id);
 155   if (!item || (item->GetState() != DownloadItem::IN_PROGRESS))
 156     return;
 157
 158   base::FilePath result;
 159 #if defined(OS_WIN)
 160   std::wstring file_part = base::FilePath(suggested_path).BaseName().value();
 161   wchar_t file_name[MAX_PATH];
 162   base::wcslcpy(file_name, file_part.c_str(), arraysize(file_name));
 163   OPENFILENAME save_as;
 164   ZeroMemory(&save_as, sizeof(save_as));
 165   save_as.lStructSize = sizeof(OPENFILENAME);
 166   save_as.hwndOwner = item->GetWebContents()->GetNativeView()->
 167       GetHost()->GetAcceleratedWidget();
 168   save_as.lpstrFile = file_name;
 169   save_as.nMaxFile = arraysize(file_name);
 170
 171   std::wstring directory;
 172   if (!suggested_path.empty())
 173     directory = suggested_path.DirName().value();
 174
 175   save_as.lpstrInitialDir = directory.c_str();
 176   save_as.Flags = OFN_OVERWRITEPROMPT | OFN_EXPLORER | OFN_ENABLESIZING |
 177                   OFN_NOCHANGEDIR | OFN_PATHMUSTEXIST;
 178
 179   if (GetSaveFileName(&save_as))
 180     result = base::FilePath(std::wstring(save_as.lpstrFile));
 181 #else
 182   NOTIMPLEMENTED();
 183 #endif
 184
 185   callback.Run(result, DownloadItem::TARGET_DISPOSITION_PROMPT,
 186                DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS, result);
 187 }
 188
 189 void ShellDownloadManagerDelegate::SetDownloadBehaviorForTesting(
 190     const base::FilePath& default_download_path) {
 191   default_download_path_ = default_download_path;
 192   suppress_prompting_ = true;
 193 }
 194
 195 }  // namespace content