chrome/browser/web_applications/web_app_win.cc

   1 // Copyright (c) 2012 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 "chrome/browser/web_applications/web_app_win.h"
   6
   7 #include <shlobj.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/files/file_enumerator.h"
  11 #include "base/files/file_util.h"
  12 #include "base/logging.h"
  13 #include "base/md5.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/path_service.h"
  16 #include "base/strings/string16.h"
  17 #include "base/strings/string_piece.h"
  18 #include "base/strings/stringprintf.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "base/win/shortcut.h"
  21 #include "base/win/windows_version.h"
  22 #include "chrome/browser/profiles/profile.h"
  23 #include "chrome/browser/web_applications/update_shortcut_worker_win.h"
  24 #include "chrome/common/chrome_switches.h"
  25 #include "chrome/installer/util/browser_distribution.h"
  26 #include "chrome/installer/util/install_util.h"
  27 #include "chrome/installer/util/shell_util.h"
  28 #include "chrome/installer/util/util_constants.h"
  29 #include "content/public/browser/browser_thread.h"
  30 #include "extensions/common/extension.h"
  31 #include "net/base/mime_util.h"
  32 #include "ui/base/win/shell.h"
  33 #include "ui/gfx/icon_util.h"
  34 #include "ui/gfx/image/image.h"
  35 #include "ui/gfx/image/image_family.h"
  36
  37 namespace {
  38
  39 const base::FilePath::CharType kIconChecksumFileExt[] =
  40     FILE_PATH_LITERAL(".ico.md5");
  41
  42 const base::FilePath::CharType kAppShimExe[] =
  43     FILE_PATH_LITERAL("app_shim.exe");
  44
  45 // Calculates checksum of an icon family using MD5.
  46 // The checksum is derived from all of the icons in the family.
  47 void GetImageCheckSum(const gfx::ImageFamily& image, base::MD5Digest* digest) {
  48   DCHECK(digest);
  49   base::MD5Context md5_context;
  50   base::MD5Init(&md5_context);
  51
  52   for (gfx::ImageFamily::const_iterator it = image.begin(); it != image.end();
  53        ++it) {
  54     SkBitmap bitmap = it->AsBitmap();
  55
  56     SkAutoLockPixels image_lock(bitmap);
  57     base::StringPiece image_data(
  58         reinterpret_cast<const char*>(bitmap.getPixels()), bitmap.getSize());
  59     base::MD5Update(&md5_context, image_data);
  60   }
  61
  62   base::MD5Final(digest, &md5_context);
  63 }
  64
  65 // Saves |image| as an |icon_file| with the checksum.
  66 bool SaveIconWithCheckSum(const base::FilePath& icon_file,
  67                           const gfx::ImageFamily& image) {
  68   if (!IconUtil::CreateIconFileFromImageFamily(image, icon_file))
  69     return false;
  70
  71   base::MD5Digest digest;
  72   GetImageCheckSum(image, &digest);
  73
  74   base::FilePath cheksum_file(icon_file.ReplaceExtension(kIconChecksumFileExt));
  75   return base::WriteFile(cheksum_file,
  76                          reinterpret_cast<const char*>(&digest),
  77                          sizeof(digest)) == sizeof(digest);
  78 }
  79
  80 // Returns true if |icon_file| is missing or different from |image|.
  81 bool ShouldUpdateIcon(const base::FilePath& icon_file,
  82                       const gfx::ImageFamily& image) {
  83   base::FilePath checksum_file(
  84       icon_file.ReplaceExtension(kIconChecksumFileExt));
  85
  86   // Returns true if icon_file or checksum file is missing.
  87   if (!base::PathExists(icon_file) ||
  88       !base::PathExists(checksum_file))
  89     return true;
  90
  91   base::MD5Digest persisted_image_checksum;
  92   if (sizeof(persisted_image_checksum) != base::ReadFile(checksum_file,
  93                       reinterpret_cast<char*>(&persisted_image_checksum),
  94                       sizeof(persisted_image_checksum)))
  95     return true;
  96
  97   base::MD5Digest downloaded_image_checksum;
  98   GetImageCheckSum(image, &downloaded_image_checksum);
  99
 100   // Update icon if checksums are not equal.
 101   return memcmp(&persisted_image_checksum, &downloaded_image_checksum,
 102                 sizeof(base::MD5Digest)) != 0;
 103 }
 104
 105 // Returns true if |shortcut_file_name| matches profile |profile_path|, and has
 106 // an --app-id flag.
 107 bool IsAppShortcutForProfile(const base::FilePath& shortcut_file_name,
 108                              const base::FilePath& profile_path) {
 109   base::string16 cmd_line_string;
 110   if (base::win::ResolveShortcut(shortcut_file_name, NULL, &cmd_line_string)) {
 111     cmd_line_string = L"program " + cmd_line_string;
 112     base::CommandLine shortcut_cmd_line =
 113         base::CommandLine::FromString(cmd_line_string);
 114     return shortcut_cmd_line.HasSwitch(switches::kProfileDirectory) &&
 115            shortcut_cmd_line.GetSwitchValuePath(switches::kProfileDirectory) ==
 116                profile_path.BaseName() &&
 117            shortcut_cmd_line.HasSwitch(switches::kAppId);
 118   }
 119
 120   return false;
 121 }
 122
 123 // Finds shortcuts in |shortcut_path| that match profile for |profile_path| and
 124 // extension with title |shortcut_name|.
 125 // If |shortcut_name| is empty, finds all shortcuts matching |profile_path|.
 126 std::vector<base::FilePath> FindAppShortcutsByProfileAndTitle(
 127     const base::FilePath& shortcut_path,
 128     const base::FilePath& profile_path,
 129     const base::string16& shortcut_name) {
 130   std::vector<base::FilePath> shortcut_paths;
 131
 132   if (shortcut_name.empty()) {
 133     // Find all shortcuts for this profile.
 134     base::FileEnumerator files(shortcut_path, false,
 135                                base::FileEnumerator::FILES,
 136                                FILE_PATH_LITERAL("*.lnk"));
 137     base::FilePath shortcut_file = files.Next();
 138     while (!shortcut_file.empty()) {
 139       if (IsAppShortcutForProfile(shortcut_file, profile_path))
 140         shortcut_paths.push_back(shortcut_file);
 141       shortcut_file = files.Next();
 142     }
 143   } else {
 144     // Find all shortcuts matching |shortcut_name|.
 145     base::FilePath base_path = shortcut_path.
 146         Append(web_app::internals::GetSanitizedFileName(shortcut_name)).
 147         AddExtension(FILE_PATH_LITERAL(".lnk"));
 148
 149     const int fileNamesToCheck = 10;
 150     for (int i = 0; i < fileNamesToCheck; ++i) {
 151       base::FilePath shortcut_file = base_path;
 152       if (i > 0) {
 153         shortcut_file = shortcut_file.InsertBeforeExtensionASCII(
 154             base::StringPrintf(" (%d)", i));
 155       }
 156       if (base::PathExists(shortcut_file) &&
 157           IsAppShortcutForProfile(shortcut_file, profile_path)) {
 158         shortcut_paths.push_back(shortcut_file);
 159       }
 160     }
 161   }
 162
 163   return shortcut_paths;
 164 }
 165
 166 // Creates application shortcuts in a given set of paths.
 167 // |shortcut_paths| is a list of directories in which shortcuts should be
 168 // created. If |creation_reason| is SHORTCUT_CREATION_AUTOMATED and there is an
 169 // existing shortcut to this app for this profile, does nothing (succeeding).
 170 // Returns true on success, false on failure.
 171 // Must be called on the FILE thread.
 172 bool CreateShortcutsInPaths(
 173     const base::FilePath& web_app_path,
 174     const web_app::ShortcutInfo& shortcut_info,
 175     const std::vector<base::FilePath>& shortcut_paths,
 176     web_app::ShortcutCreationReason creation_reason,
 177     std::vector<base::FilePath>* out_filenames) {
 178   // Ensure web_app_path exists.
 179   if (!base::PathExists(web_app_path) &&
 180       !base::CreateDirectory(web_app_path)) {
 181     return false;
 182   }
 183
 184   // Generates file name to use with persisted ico and shortcut file.
 185   base::FilePath icon_file =
 186       web_app::internals::GetIconFilePath(web_app_path, shortcut_info.title);
 187   if (!web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info.favicon,
 188                                             false)) {
 189     return false;
 190   }
 191
 192   base::FilePath chrome_exe;
 193   if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
 194     NOTREACHED();
 195     return false;
 196   }
 197
 198   // Working directory.
 199   base::FilePath working_dir(chrome_exe.DirName());
 200
 201   base::CommandLine cmd_line(base::CommandLine::NO_PROGRAM);
 202   cmd_line = ShellIntegration::CommandLineArgsForLauncher(shortcut_info.url,
 203       shortcut_info.extension_id, shortcut_info.profile_path);
 204
 205   // TODO(evan): we rely on the fact that command_line_string() is
 206   // properly quoted for a Windows command line.  The method on
 207   // base::CommandLine should probably be renamed to better reflect that
 208   // fact.
 209   base::string16 wide_switches(cmd_line.GetCommandLineString());
 210
 211   // Sanitize description
 212   base::string16 description = shortcut_info.description;
 213   if (description.length() >= MAX_PATH)
 214     description.resize(MAX_PATH - 1);
 215
 216   // Generates app id from web app url and profile path.
 217   std::string app_name(web_app::GenerateApplicationNameFromInfo(shortcut_info));
 218   base::string16 app_id(ShellIntegration::GetAppModelIdForProfile(
 219       base::UTF8ToUTF16(app_name), shortcut_info.profile_path));
 220
 221   bool success = true;
 222   for (size_t i = 0; i < shortcut_paths.size(); ++i) {
 223     base::FilePath shortcut_file =
 224         shortcut_paths[i]
 225             .Append(
 226                  web_app::internals::GetSanitizedFileName(shortcut_info.title))
 227             .AddExtension(installer::kLnkExt);
 228     if (creation_reason == web_app::SHORTCUT_CREATION_AUTOMATED) {
 229       // Check whether there is an existing shortcut to this app.
 230       std::vector<base::FilePath> shortcut_files =
 231           FindAppShortcutsByProfileAndTitle(shortcut_paths[i],
 232                                             shortcut_info.profile_path,
 233                                             shortcut_info.title);
 234       if (!shortcut_files.empty())
 235         continue;
 236     }
 237     if (shortcut_paths[i] != web_app_path) {
 238       int unique_number =
 239           base::GetUniquePathNumber(shortcut_file,
 240                                     base::FilePath::StringType());
 241       if (unique_number == -1) {
 242         success = false;
 243         continue;
 244       } else if (unique_number > 0) {
 245         shortcut_file = shortcut_file.InsertBeforeExtensionASCII(
 246             base::StringPrintf(" (%d)", unique_number));
 247       }
 248     }
 249     base::win::ShortcutProperties shortcut_properties;
 250     shortcut_properties.set_target(chrome_exe);
 251     shortcut_properties.set_working_dir(working_dir);
 252     shortcut_properties.set_arguments(wide_switches);
 253     shortcut_properties.set_description(description);
 254     shortcut_properties.set_icon(icon_file, 0);
 255     shortcut_properties.set_app_id(app_id);
 256     shortcut_properties.set_dual_mode(false);
 257     if (!base::PathExists(shortcut_file.DirName()) &&
 258         !base::CreateDirectory(shortcut_file.DirName())) {
 259       NOTREACHED();
 260       return false;
 261     }
 262     success = base::win::CreateOrUpdateShortcutLink(
 263         shortcut_file, shortcut_properties,
 264         base::win::SHORTCUT_CREATE_ALWAYS) && success;
 265     if (out_filenames)
 266       out_filenames->push_back(shortcut_file);
 267   }
 268
 269   return success;
 270 }
 271
 272 // Gets the directories with shortcuts for an app, and deletes the shortcuts.
 273 // This will search the standard locations for shortcuts named |title| that open
 274 // in the profile with |profile_path|.
 275 // |was_pinned_to_taskbar| will be set to true if there was previously a
 276 // shortcut pinned to the taskbar for this app; false otherwise.
 277 // If |web_app_path| is empty, this will not delete shortcuts from the web app
 278 // directory. If |title| is empty, all shortcuts for this profile will be
 279 // deleted.
 280 // |shortcut_paths| will be populated with a list of directories where shortcuts
 281 // for this app were found (and deleted). This will delete duplicate shortcuts,
 282 // but only return each path once, even if it contained multiple deleted
 283 // shortcuts. Both of these may be NULL.
 284 void GetShortcutLocationsAndDeleteShortcuts(
 285     const base::FilePath& web_app_path,
 286     const base::FilePath& profile_path,
 287     const base::string16& title,
 288     bool* was_pinned_to_taskbar,
 289     std::vector<base::FilePath>* shortcut_paths) {
 290   DCHECK(content::BrowserThread::FILE);
 291
 292   // Get all possible locations for shortcuts.
 293   web_app::ShortcutLocations all_shortcut_locations;
 294   all_shortcut_locations.in_quick_launch_bar = true;
 295   all_shortcut_locations.on_desktop = true;
 296   // Delete shortcuts from the Chrome Apps subdirectory.
 297   // This matches the subdir name set by CreateApplicationShortcutView::Accept
 298   // for Chrome apps (not URL apps, but this function does not apply for them).
 299   all_shortcut_locations.applications_menu_location =
 300       web_app::APP_MENU_LOCATION_SUBDIR_CHROMEAPPS;
 301   std::vector<base::FilePath> all_paths = web_app::internals::GetShortcutPaths(
 302       all_shortcut_locations);
 303   if (base::win::GetVersion() >= base::win::VERSION_WIN7 &&
 304       !web_app_path.empty()) {
 305     all_paths.push_back(web_app_path);
 306   }
 307
 308   if (was_pinned_to_taskbar) {
 309     // Determine if there is a link to this app in the TaskBar pin directory.
 310     base::FilePath taskbar_pin_path;
 311     if (PathService::Get(base::DIR_TASKBAR_PINS, &taskbar_pin_path)) {
 312       std::vector<base::FilePath> taskbar_pin_files =
 313           FindAppShortcutsByProfileAndTitle(taskbar_pin_path, profile_path,
 314                                             title);
 315       *was_pinned_to_taskbar = !taskbar_pin_files.empty();
 316     } else {
 317       *was_pinned_to_taskbar = false;
 318     }
 319   }
 320
 321   for (std::vector<base::FilePath>::const_iterator i = all_paths.begin();
 322        i != all_paths.end(); ++i) {
 323     std::vector<base::FilePath> shortcut_files =
 324         FindAppShortcutsByProfileAndTitle(*i, profile_path, title);
 325     if (shortcut_paths && !shortcut_files.empty()) {
 326       shortcut_paths->push_back(*i);
 327     }
 328     for (std::vector<base::FilePath>::const_iterator j = shortcut_files.begin();
 329          j != shortcut_files.end(); ++j) {
 330       // Any shortcut could have been pinned, either by chrome or the user, so
 331       // they are all unpinned.
 332       base::win::UnpinShortcutFromTaskbar(*j);
 333       base::DeleteFile(*j, false);
 334     }
 335   }
 336 }
 337
 338 void CreateIconAndSetRelaunchDetails(
 339     const base::FilePath& web_app_path,
 340     const base::FilePath& icon_file,
 341     scoped_ptr<web_app::ShortcutInfo> shortcut_info,
 342     HWND hwnd) {
 343   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 344
 345   base::CommandLine command_line = ShellIntegration::CommandLineArgsForLauncher(
 346       shortcut_info->url, shortcut_info->extension_id,
 347       shortcut_info->profile_path);
 348
 349   base::FilePath chrome_exe;
 350   if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
 351     NOTREACHED();
 352     return;
 353   }
 354   command_line.SetProgram(chrome_exe);
 355   ui::win::SetRelaunchDetailsForWindow(command_line.GetCommandLineString(),
 356                                        shortcut_info->title, hwnd);
 357
 358   if (!base::PathExists(web_app_path) && !base::CreateDirectory(web_app_path))
 359     return;
 360
 361   ui::win::SetAppIconForWindow(icon_file.value(), hwnd);
 362   web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info->favicon, true);
 363 }
 364
 365 void OnShortcutInfoLoadedForSetRelaunchDetails(
 366     HWND hwnd,
 367     scoped_ptr<web_app::ShortcutInfo> shortcut_info) {
 368   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 369
 370   // Set window's icon to the one we're about to create/update in the web app
 371   // path. The icon cache will refresh on icon creation.
 372   base::FilePath web_app_path = web_app::GetWebAppDataDirectory(
 373       shortcut_info->profile_path, shortcut_info->extension_id,
 374       shortcut_info->url);
 375   base::FilePath icon_file =
 376       web_app::internals::GetIconFilePath(web_app_path, shortcut_info->title);
 377   content::BrowserThread::PostBlockingPoolTask(
 378       FROM_HERE, base::Bind(&CreateIconAndSetRelaunchDetails, web_app_path,
 379                             icon_file, base::Passed(&shortcut_info), hwnd));
 380 }
 381
 382 // Creates an "app shim exe" by linking or copying the generic app shim exe.
 383 // This is the binary that will be run when the user opens a file with this
 384 // application. The name and icon of the binary will be used on the Open With
 385 // menu. For this reason, we cannot simply launch chrome.exe. We give the app
 386 // shim exe the same name as the application (with no ".exe" extension), so that
 387 // the correct title will appear on the Open With menu. (Note: we also need a
 388 // separate binary per app because Windows only allows a single association with
 389 // each executable.)
 390 // |path| is the full path of the shim binary to be created.
 391 bool CreateAppShimBinary(const base::FilePath& path) {
 392   // TODO(mgiuca): Hard-link instead of copying, if on the same file system.
 393   // Get the Chrome version directory (the directory containing the chrome.dll
 394   // module). This is the directory where app_shim.exe is located.
 395   base::FilePath chrome_version_directory;
 396   if (!PathService::Get(base::DIR_MODULE, &chrome_version_directory)) {
 397     NOTREACHED();
 398     return false;
 399   }
 400
 401   base::FilePath generic_shim_path =
 402       chrome_version_directory.Append(kAppShimExe);
 403   if (!base::CopyFile(generic_shim_path, path)) {
 404     if (!base::PathExists(generic_shim_path)) {
 405       LOG(ERROR) << "Could not find app shim exe at "
 406                  << generic_shim_path.value();
 407     } else {
 408       LOG(ERROR) << "Could not copy app shim exe to " << path.value();
 409     }
 410     return false;
 411   }
 412
 413   return true;
 414 }
 415
 416 // Gets the full command line for calling the shim binary. This will include a
 417 // placeholder "%1" argument, which Windows will substitute with the filename
 418 // chosen by the user.
 419 base::CommandLine GetAppShimCommandLine(const base::FilePath& app_shim_path,
 420                                         const std::string& extension_id,
 421                                         const base::FilePath& profile_path) {
 422   // Get the command-line to pass to the shim (e.g., "chrome.exe --app-id=...").
 423   base::CommandLine chrome_cmd_line =
 424       ShellIntegration::CommandLineArgsForLauncher(GURL(), extension_id,
 425                                                    profile_path);
 426   chrome_cmd_line.AppendArg("%1");
 427
 428   // Get the command-line for calling the shim (e.g.,
 429   // "app_shim [--chrome-sxs] -- --app-id=...").
 430   base::CommandLine shim_cmd_line(app_shim_path);
 431   // If this is a canary build, launch the shim in canary mode.
 432   if (InstallUtil::IsChromeSxSProcess())
 433     shim_cmd_line.AppendSwitch(installer::switches::kChromeSxS);
 434   // Ensure all subsequent switches are treated as args to the shim.
 435   shim_cmd_line.AppendArg("--");
 436   for (size_t i = 1; i < chrome_cmd_line.argv().size(); ++i)
 437     shim_cmd_line.AppendArgNative(chrome_cmd_line.argv()[i]);
 438
 439   return shim_cmd_line;
 440 }
 441
 442 // Gets the set of file extensions associated with a particular file handler.
 443 // Uses both the MIME types and extensions.
 444 void GetHandlerFileExtensions(const extensions::FileHandlerInfo& handler,
 445                               std::set<base::string16>* exts) {
 446   for (const auto& mime : handler.types) {
 447     std::vector<base::string16> mime_type_extensions;
 448     net::GetExtensionsForMimeType(mime, &mime_type_extensions);
 449     exts->insert(mime_type_extensions.begin(), mime_type_extensions.end());
 450   }
 451   for (const auto& ext : handler.extensions)
 452     exts->insert(base::UTF8ToUTF16(ext));
 453 }
 454
 455 // Creates operating system file type associations for a given app.
 456 // This is the platform specific implementation of the CreateFileAssociations
 457 // function, and is executed on the FILE thread.
 458 // Returns true on success, false on failure.
 459 bool CreateFileAssociationsForApp(
 460     const std::string& extension_id,
 461     const base::string16& title,
 462     const base::FilePath& profile_path,
 463     const extensions::FileHandlersInfo& file_handlers_info) {
 464   base::FilePath web_app_path =
 465       web_app::GetWebAppDataDirectory(profile_path, extension_id, GURL());
 466   base::FilePath file_name = web_app::internals::GetSanitizedFileName(title);
 467
 468   // The progid is "chrome-APPID-HANDLERID". This is the internal name Windows
 469   // will use for file associations with this application.
 470   base::string16 progid_base = L"chrome-";
 471   progid_base += base::UTF8ToUTF16(extension_id);
 472
 473   // Create the app shim binary (see CreateAppShimBinary for rationale). Get the
 474   // command line for the shim.
 475   base::FilePath app_shim_path = web_app_path.Append(file_name);
 476   if (!CreateAppShimBinary(app_shim_path))
 477     return false;
 478
 479   base::CommandLine shim_cmd_line(
 480       GetAppShimCommandLine(app_shim_path, extension_id, profile_path));
 481
 482   // TODO(mgiuca): Get the file type name from the manifest, or generate a
 483   // default one. (If this is blank, Windows will generate one of the form
 484   // '<EXT> file'.)
 485   base::string16 file_type_name = L"";
 486
 487   // TODO(mgiuca): Generate a new icon for this application's file associations
 488   // that looks like a page with the application icon inside.
 489   base::FilePath icon_file =
 490       web_app::internals::GetIconFilePath(web_app_path, title);
 491
 492   // Create a separate file association (ProgId) for each handler. This allows
 493   // each handler to have its own filetype name and icon, and also a different
 494   // command line (so the app can see which handler was invoked).
 495   size_t num_successes = 0;
 496   for (const auto& handler : file_handlers_info) {
 497     base::string16 progid = progid_base + L"-" + base::UTF8ToUTF16(handler.id);
 498
 499     std::set<base::string16> exts;
 500     GetHandlerFileExtensions(handler, &exts);
 501
 502     if (ShellUtil::AddFileAssociations(progid, shim_cmd_line, file_type_name,
 503                                        icon_file, exts)) {
 504       ++num_successes;
 505     }
 506   }
 507
 508   if (num_successes == 0) {
 509     // There were no successes; delete the shim.
 510     base::DeleteFile(app_shim_path, false);
 511   } else {
 512     // There were some successes; tell Windows Explorer to update its cache.
 513     SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST | SHCNF_FLUSHNOWAIT,
 514                    nullptr, nullptr);
 515   }
 516
 517   return num_successes == file_handlers_info.size();
 518 }
 519
 520 }  // namespace
 521
 522 namespace web_app {
 523
 524 base::FilePath CreateShortcutInWebAppDir(
 525     const base::FilePath& web_app_dir,
 526     scoped_ptr<ShortcutInfo> shortcut_info) {
 527   std::vector<base::FilePath> paths;
 528   paths.push_back(web_app_dir);
 529   std::vector<base::FilePath> out_filenames;
 530   base::FilePath web_app_dir_shortcut =
 531       web_app_dir.Append(internals::GetSanitizedFileName(shortcut_info->title))
 532           .AddExtension(installer::kLnkExt);
 533   if (!PathExists(web_app_dir_shortcut)) {
 534     CreateShortcutsInPaths(web_app_dir, *shortcut_info, paths,
 535                            SHORTCUT_CREATION_BY_USER, &out_filenames);
 536     DCHECK_EQ(out_filenames.size(), 1u);
 537     DCHECK_EQ(out_filenames[0].value(), web_app_dir_shortcut.value());
 538   } else {
 539     internals::CheckAndSaveIcon(
 540         internals::GetIconFilePath(web_app_dir, shortcut_info->title),
 541         shortcut_info->favicon, true);
 542   }
 543   return web_app_dir_shortcut;
 544 }
 545
 546 void UpdateRelaunchDetailsForApp(Profile* profile,
 547                                  const extensions::Extension* extension,
 548                                  HWND hwnd) {
 549   web_app::GetShortcutInfoForApp(
 550       extension,
 551       profile,
 552       base::Bind(&OnShortcutInfoLoadedForSetRelaunchDetails, hwnd));
 553 }
 554
 555 void UpdateShortcutsForAllApps(Profile* profile,
 556                                const base::Closure& callback) {
 557   callback.Run();
 558 }
 559
 560 namespace internals {
 561
 562 bool CheckAndSaveIcon(const base::FilePath& icon_file,
 563                       const gfx::ImageFamily& image,
 564                       bool refresh_shell_icon_cache) {
 565   if (!ShouldUpdateIcon(icon_file, image))
 566     return true;
 567
 568   if (!SaveIconWithCheckSum(icon_file, image))
 569     return false;
 570
 571   if (refresh_shell_icon_cache) {
 572     // Refresh shell's icon cache. This call is quite disruptive as user would
 573     // see explorer rebuilding the icon cache. It would be great that we find
 574     // a better way to achieve this.
 575     SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST | SHCNF_FLUSHNOWAIT, NULL,
 576                    NULL);
 577   }
 578   return true;
 579 }
 580
 581 bool CreatePlatformShortcuts(
 582     const base::FilePath& web_app_path,
 583     scoped_ptr<ShortcutInfo> shortcut_info,
 584     const extensions::FileHandlersInfo& file_handlers_info,
 585     const ShortcutLocations& creation_locations,
 586     ShortcutCreationReason creation_reason) {
 587   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
 588
 589   // Nothing to do on Windows for hidden apps.
 590   if (creation_locations.applications_menu_location == APP_MENU_LOCATION_HIDDEN)
 591     return true;
 592
 593   // Shortcut paths under which to create shortcuts.
 594   std::vector<base::FilePath> shortcut_paths =
 595       GetShortcutPaths(creation_locations);
 596
 597   bool pin_to_taskbar = creation_locations.in_quick_launch_bar &&
 598                         (base::win::GetVersion() >= base::win::VERSION_WIN7);
 599
 600   // Create/update the shortcut in the web app path for the "Pin To Taskbar"
 601   // option in Win7. We use the web app path shortcut because we will overwrite
 602   // it rather than appending unique numbers if the shortcut already exists.
 603   // This prevents pinned apps from having unique numbers in their names.
 604   if (pin_to_taskbar)
 605     shortcut_paths.push_back(web_app_path);
 606
 607   if (shortcut_paths.empty())
 608     return false;
 609
 610   if (!CreateShortcutsInPaths(web_app_path, *shortcut_info, shortcut_paths,
 611                               creation_reason, NULL))
 612     return false;
 613
 614   if (pin_to_taskbar) {
 615     base::FilePath file_name = GetSanitizedFileName(shortcut_info->title);
 616     // Use the web app path shortcut for pinning to avoid having unique numbers
 617     // in the application name.
 618     base::FilePath shortcut_to_pin = web_app_path.Append(file_name).
 619         AddExtension(installer::kLnkExt);
 620     if (!base::win::PinShortcutToTaskbar(shortcut_to_pin))
 621       return false;
 622   }
 623
 624   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 625           switches::kEnableAppsFileAssociations)) {
 626     CreateFileAssociationsForApp(
 627         shortcut_info->extension_id, shortcut_info->title,
 628         shortcut_info->profile_path, file_handlers_info);
 629   }
 630
 631   return true;
 632 }
 633
 634 void UpdatePlatformShortcuts(
 635     const base::FilePath& web_app_path,
 636     const base::string16& old_app_title,
 637     scoped_ptr<ShortcutInfo> shortcut_info,
 638     const extensions::FileHandlersInfo& file_handlers_info) {
 639   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
 640
 641   // Generates file name to use with persisted ico and shortcut file.
 642   base::FilePath file_name =
 643       web_app::internals::GetSanitizedFileName(shortcut_info->title);
 644
 645   if (old_app_title != shortcut_info->title) {
 646     // The app's title has changed. Delete all existing app shortcuts and
 647     // recreate them in any locations they already existed (but do not add them
 648     // to locations where they do not currently exist).
 649     bool was_pinned_to_taskbar;
 650     std::vector<base::FilePath> shortcut_paths;
 651     GetShortcutLocationsAndDeleteShortcuts(
 652         web_app_path, shortcut_info->profile_path, old_app_title,
 653         &was_pinned_to_taskbar, &shortcut_paths);
 654     CreateShortcutsInPaths(web_app_path, *shortcut_info, shortcut_paths,
 655                            SHORTCUT_CREATION_BY_USER, NULL);
 656     // If the shortcut was pinned to the taskbar,
 657     // GetShortcutLocationsAndDeleteShortcuts will have deleted it. In that
 658     // case, re-pin it.
 659     if (was_pinned_to_taskbar) {
 660       base::FilePath file_name = GetSanitizedFileName(shortcut_info->title);
 661       // Use the web app path shortcut for pinning to avoid having unique
 662       // numbers in the application name.
 663       base::FilePath shortcut_to_pin = web_app_path.Append(file_name).
 664           AddExtension(installer::kLnkExt);
 665       base::win::PinShortcutToTaskbar(shortcut_to_pin);
 666     }
 667   }
 668
 669   // Update the icon if necessary.
 670   base::FilePath icon_file =
 671       GetIconFilePath(web_app_path, shortcut_info->title);
 672   CheckAndSaveIcon(icon_file, shortcut_info->favicon, true);
 673 }
 674
 675 void DeletePlatformShortcuts(const base::FilePath& web_app_path,
 676                              scoped_ptr<ShortcutInfo> shortcut_info) {
 677   GetShortcutLocationsAndDeleteShortcuts(web_app_path,
 678                                          shortcut_info->profile_path,
 679                                          shortcut_info->title, NULL, NULL);
 680
 681   // If there are no more shortcuts in the Chrome Apps subdirectory, remove it.
 682   base::FilePath chrome_apps_dir;
 683   if (ShellUtil::GetShortcutPath(
 684           ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 685           BrowserDistribution::GetDistribution(),
 686           ShellUtil::CURRENT_USER,
 687           &chrome_apps_dir)) {
 688     if (base::IsDirectoryEmpty(chrome_apps_dir))
 689       base::DeleteFile(chrome_apps_dir, false);
 690   }
 691 }
 692
 693 void DeleteAllShortcutsForProfile(const base::FilePath& profile_path) {
 694   GetShortcutLocationsAndDeleteShortcuts(base::FilePath(), profile_path, L"",
 695                                          NULL, NULL);
 696
 697   // If there are no more shortcuts in the Chrome Apps subdirectory, remove it.
 698   base::FilePath chrome_apps_dir;
 699   if (ShellUtil::GetShortcutPath(
 700           ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 701           BrowserDistribution::GetDistribution(),
 702           ShellUtil::CURRENT_USER,
 703           &chrome_apps_dir)) {
 704     if (base::IsDirectoryEmpty(chrome_apps_dir))
 705       base::DeleteFile(chrome_apps_dir, false);
 706   }
 707 }
 708
 709 std::vector<base::FilePath> GetShortcutPaths(
 710     const ShortcutLocations& creation_locations) {
 711   // Shortcut paths under which to create shortcuts.
 712   std::vector<base::FilePath> shortcut_paths;
 713   // Locations to add to shortcut_paths.
 714   struct {
 715     bool use_this_location;
 716     ShellUtil::ShortcutLocation location_id;
 717   } locations[] = {
 718     {
 719       creation_locations.on_desktop,
 720       ShellUtil::SHORTCUT_LOCATION_DESKTOP
 721     }, {
 722       creation_locations.applications_menu_location ==
 723           APP_MENU_LOCATION_ROOT,
 724       ShellUtil::SHORTCUT_LOCATION_START_MENU_ROOT
 725     }, {
 726       creation_locations.applications_menu_location ==
 727           APP_MENU_LOCATION_SUBDIR_CHROME,
 728       ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_DIR
 729     }, {
 730       creation_locations.applications_menu_location ==
 731           APP_MENU_LOCATION_SUBDIR_CHROMEAPPS,
 732       ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR
 733     }, {
 734       // For Win7+, |in_quick_launch_bar| indicates that we are pinning to
 735       // taskbar. This needs to be handled by callers.
 736       creation_locations.in_quick_launch_bar &&
 737           base::win::GetVersion() < base::win::VERSION_WIN7,
 738       ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH
 739     }
 740   };
 741
 742   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
 743   // Populate shortcut_paths.
 744   for (int i = 0; i < arraysize(locations); ++i) {
 745     if (locations[i].use_this_location) {
 746       base::FilePath path;
 747       if (!ShellUtil::GetShortcutPath(locations[i].location_id,
 748                                       dist,
 749                                       ShellUtil::CURRENT_USER,
 750                                       &path)) {
 751         NOTREACHED();
 752         continue;
 753       }
 754       shortcut_paths.push_back(path);
 755     }
 756   }
 757   return shortcut_paths;
 758 }
 759
 760 base::FilePath GetIconFilePath(const base::FilePath& web_app_path,
 761                                const base::string16& title) {
 762   return web_app_path.Append(GetSanitizedFileName(title))
 763       .AddExtension(FILE_PATH_LITERAL(".ico"));
 764 }
 765
 766 }  // namespace internals
 767
 768 void UpdateShortcutForTabContents(content::WebContents* web_contents) {
 769   // UpdateShortcutWorker will delete itself when it's done.
 770   UpdateShortcutWorker* worker = new UpdateShortcutWorker(web_contents);
 771   worker->Run();
 772 }
 773
 774 }  // namespace web_app