ui/shell_dialogs/select_file_dialog_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 "ui/shell_dialogs/select_file_dialog_win.h"
   6
   7 #include <shlobj.h>
   8
   9 #include <algorithm>
  10 #include <set>
  11
  12 #include "base/bind.h"
  13 #include "base/files/file_path.h"
  14 #include "base/files/file_util.h"
  15 #include "base/i18n/case_conversion.h"
  16 #include "base/message_loop/message_loop.h"
  17 #include "base/message_loop/message_loop_proxy.h"
  18 #include "base/threading/thread.h"
  19 #include "base/tuple.h"
  20 #include "base/win/registry.h"
  21 #include "base/win/scoped_comptr.h"
  22 #include "base/win/shortcut.h"
  23 #include "ui/aura/window.h"
  24 #include "ui/aura/window_event_dispatcher.h"
  25 #include "ui/aura/window_tree_host.h"
  26 #include "ui/base/l10n/l10n_util.h"
  27 #include "ui/base/win/open_file_name_win.h"
  28 #include "ui/gfx/native_widget_types.h"
  29 #include "ui/shell_dialogs/base_shell_dialog_win.h"
  30 #include "ui/shell_dialogs/shell_dialogs_delegate.h"
  31 #include "ui/strings/grit/ui_strings.h"
  32 #include "win8/viewer/metro_viewer_process_host.h"
  33
  34 namespace {
  35
  36 bool CallBuiltinGetOpenFileName(OPENFILENAME* ofn) {
  37   return ::GetOpenFileName(ofn) == TRUE;
  38 }
  39
  40 bool CallBuiltinGetSaveFileName(OPENFILENAME* ofn) {
  41   return ::GetSaveFileName(ofn) == TRUE;
  42 }
  43
  44 // Given |extension|, if it's not empty, then remove the leading dot.
  45 std::wstring GetExtensionWithoutLeadingDot(const std::wstring& extension) {
  46   DCHECK(extension.empty() || extension[0] == L'.');
  47   return extension.empty() ? extension : extension.substr(1);
  48 }
  49
  50 // Distinguish directories from regular files.
  51 bool IsDirectory(const base::FilePath& path) {
  52   base::File::Info file_info;
  53   return base::GetFileInfo(path, &file_info) ?
  54       file_info.is_directory : path.EndsWithSeparator();
  55 }
  56
  57 // Get the file type description from the registry. This will be "Text Document"
  58 // for .txt files, "JPEG Image" for .jpg files, etc. If the registry doesn't
  59 // have an entry for the file type, we return false, true if the description was
  60 // found. 'file_ext' must be in form ".txt".
  61 static bool GetRegistryDescriptionFromExtension(const std::wstring& file_ext,
  62                                                 std::wstring* reg_description) {
  63   DCHECK(reg_description);
  64   base::win::RegKey reg_ext(HKEY_CLASSES_ROOT, file_ext.c_str(), KEY_READ);
  65   std::wstring reg_app;
  66   if (reg_ext.ReadValue(NULL, &reg_app) == ERROR_SUCCESS && !reg_app.empty()) {
  67     base::win::RegKey reg_link(HKEY_CLASSES_ROOT, reg_app.c_str(), KEY_READ);
  68     if (reg_link.ReadValue(NULL, reg_description) == ERROR_SUCCESS)
  69       return true;
  70   }
  71   return false;
  72 }
  73
  74 // Set up a filter for a Save/Open dialog, which will consist of |file_ext| file
  75 // extensions (internally separated by semicolons), |ext_desc| as the text
  76 // descriptions of the |file_ext| types (optional), and (optionally) the default
  77 // 'All Files' view. The purpose of the filter is to show only files of a
  78 // particular type in a Windows Save/Open dialog box. The resulting filter is
  79 // returned. The filters created here are:
  80 //   1. only files that have 'file_ext' as their extension
  81 //   2. all files (only added if 'include_all_files' is true)
  82 // Example:
  83 //   file_ext: { "*.txt", "*.htm;*.html" }
  84 //   ext_desc: { "Text Document" }
  85 //   returned: "Text Document\0*.txt\0HTML Document\0*.htm;*.html\0"
  86 //             "All Files\0*.*\0\0" (in one big string)
  87 // If a description is not provided for a file extension, it will be retrieved
  88 // from the registry. If the file extension does not exist in the registry, it
  89 // will be omitted from the filter, as it is likely a bogus extension.
  90 std::wstring FormatFilterForExtensions(
  91     const std::vector<std::wstring>& file_ext,
  92     const std::vector<std::wstring>& ext_desc,
  93     bool include_all_files) {
  94   const std::wstring all_ext = L"*.*";
  95   const std::wstring all_desc =
  96       l10n_util::GetStringUTF16(IDS_APP_SAVEAS_ALL_FILES);
  97
  98   DCHECK(file_ext.size() >= ext_desc.size());
  99
 100   if (file_ext.empty())
 101     include_all_files = true;
 102
 103   std::wstring result;
 104
 105   for (size_t i = 0; i < file_ext.size(); ++i) {
 106     std::wstring ext = file_ext[i];
 107     std::wstring desc;
 108     if (i < ext_desc.size())
 109       desc = ext_desc[i];
 110
 111     if (ext.empty()) {
 112       // Force something reasonable to appear in the dialog box if there is no
 113       // extension provided.
 114       include_all_files = true;
 115       continue;
 116     }
 117
 118     if (desc.empty()) {
 119       DCHECK(ext.find(L'.') != std::wstring::npos);
 120       std::wstring first_extension = ext.substr(ext.find(L'.'));
 121       size_t first_separator_index = first_extension.find(L';');
 122       if (first_separator_index != std::wstring::npos)
 123         first_extension = first_extension.substr(0, first_separator_index);
 124
 125       // Find the extension name without the preceeding '.' character.
 126       std::wstring ext_name = first_extension;
 127       size_t ext_index = ext_name.find_first_not_of(L'.');
 128       if (ext_index != std::wstring::npos)
 129         ext_name = ext_name.substr(ext_index);
 130
 131       if (!GetRegistryDescriptionFromExtension(first_extension, &desc)) {
 132         // The extension doesn't exist in the registry. Create a description
 133         // based on the unknown extension type (i.e. if the extension is .qqq,
 134         // the we create a description "QQQ File (.qqq)").
 135         include_all_files = true;
 136         desc = l10n_util::GetStringFUTF16(IDS_APP_SAVEAS_EXTENSION_FORMAT,
 137                                           base::i18n::ToUpper(ext_name),
 138                                           ext_name);
 139       }
 140       if (desc.empty())
 141         desc = L"*." + ext_name;
 142     }
 143
 144     result.append(desc.c_str(), desc.size() + 1);  // Append NULL too.
 145     result.append(ext.c_str(), ext.size() + 1);
 146   }
 147
 148   if (include_all_files) {
 149     result.append(all_desc.c_str(), all_desc.size() + 1);
 150     result.append(all_ext.c_str(), all_ext.size() + 1);
 151   }
 152
 153   result.append(1, '\0');  // Double NULL required.
 154   return result;
 155 }
 156
 157 // Implementation of SelectFileDialog that shows a Windows common dialog for
 158 // choosing a file or folder.
 159 class SelectFileDialogImpl : public ui::SelectFileDialog,
 160                              public ui::BaseShellDialogImpl {
 161  public:
 162   SelectFileDialogImpl(
 163       Listener* listener,
 164       ui::SelectFilePolicy* policy,
 165       const base::Callback<bool(OPENFILENAME*)>& get_open_file_name_impl,
 166       const base::Callback<bool(OPENFILENAME*)>& get_save_file_name_impl);
 167
 168   // BaseShellDialog implementation:
 169   virtual bool IsRunning(gfx::NativeWindow owning_window) const override;
 170   virtual void ListenerDestroyed() override;
 171
 172  protected:
 173   // SelectFileDialog implementation:
 174   virtual void SelectFileImpl(
 175       Type type,
 176       const base::string16& title,
 177       const base::FilePath& default_path,
 178       const FileTypeInfo* file_types,
 179       int file_type_index,
 180       const base::FilePath::StringType& default_extension,
 181       gfx::NativeWindow owning_window,
 182       void* params) override;
 183
 184  private:
 185   virtual ~SelectFileDialogImpl();
 186
 187   // A struct for holding all the state necessary for displaying a Save dialog.
 188   struct ExecuteSelectParams {
 189     ExecuteSelectParams(Type type,
 190                         const std::wstring& title,
 191                         const base::FilePath& default_path,
 192                         const FileTypeInfo* file_types,
 193                         int file_type_index,
 194                         const std::wstring& default_extension,
 195                         RunState run_state,
 196                         HWND owner,
 197                         void* params)
 198         : type(type),
 199           title(title),
 200           default_path(default_path),
 201           file_type_index(file_type_index),
 202           default_extension(default_extension),
 203           run_state(run_state),
 204           ui_proxy(base::MessageLoopForUI::current()->message_loop_proxy()),
 205           owner(owner),
 206           params(params) {
 207       if (file_types)
 208         this->file_types = *file_types;
 209     }
 210     SelectFileDialog::Type type;
 211     std::wstring title;
 212     base::FilePath default_path;
 213     FileTypeInfo file_types;
 214     int file_type_index;
 215     std::wstring default_extension;
 216     RunState run_state;
 217     scoped_refptr<base::MessageLoopProxy> ui_proxy;
 218     HWND owner;
 219     void* params;
 220   };
 221
 222   // Shows the file selection dialog modal to |owner| and calls the result
 223   // back on the ui thread. Run on the dialog thread.
 224   void ExecuteSelectFile(const ExecuteSelectParams& params);
 225
 226   // Prompt the user for location to save a file.
 227   // Callers should provide the filter string, and also a filter index.
 228   // The parameter |index| indicates the initial index of filter description
 229   // and filter pattern for the dialog box. If |index| is zero or greater than
 230   // the number of total filter types, the system uses the first filter in the
 231   // |filter| buffer. |index| is used to specify the initial selected extension,
 232   // and when done contains the extension the user chose. The parameter
 233   // |final_name| returns the file name which contains the drive designator,
 234   // path, file name, and extension of the user selected file name. |def_ext| is
 235   // the default extension to give to the file if the user did not enter an
 236   // extension. If |ignore_suggested_ext| is true, any file extension contained
 237   // in |suggested_name| will not be used to generate the file name. This is
 238   // useful in the case of saving web pages, where we know the extension type
 239   // already and where |suggested_name| may contain a '.' character as a valid
 240   // part of the name, thus confusing our extension detection code.
 241   bool SaveFileAsWithFilter(HWND owner,
 242                             const std::wstring& suggested_name,
 243                             const std::wstring& filter,
 244                             const std::wstring& def_ext,
 245                             bool ignore_suggested_ext,
 246                             unsigned* index,
 247                             std::wstring* final_name);
 248
 249   // Notifies the listener that a folder was chosen. Run on the ui thread.
 250   void FileSelected(const base::FilePath& path, int index,
 251                     void* params, RunState run_state);
 252
 253   // Notifies listener that multiple files were chosen. Run on the ui thread.
 254   void MultiFilesSelected(const std::vector<base::FilePath>& paths,
 255                          void* params,
 256                          RunState run_state);
 257
 258   // Notifies the listener that no file was chosen (the action was canceled).
 259   // Run on the ui thread.
 260   void FileNotSelected(void* params, RunState run_state);
 261
 262   // Runs a Folder selection dialog box, passes back the selected folder in
 263   // |path| and returns true if the user clicks OK. If the user cancels the
 264   // dialog box the value in |path| is not modified and returns false. |title|
 265   // is the user-supplied title text to show for the dialog box. Run on the
 266   // dialog thread.
 267   bool RunSelectFolderDialog(const std::wstring& title,
 268                              HWND owner,
 269                              base::FilePath* path);
 270
 271   // Runs an Open file dialog box, with similar semantics for input paramaters
 272   // as RunSelectFolderDialog.
 273   bool RunOpenFileDialog(const std::wstring& title,
 274                          const std::wstring& filters,
 275                          HWND owner,
 276                          base::FilePath* path);
 277
 278   // Runs an Open file dialog box that supports multi-select, with similar
 279   // semantics for input paramaters as RunOpenFileDialog.
 280   bool RunOpenMultiFileDialog(const std::wstring& title,
 281                               const std::wstring& filter,
 282                               HWND owner,
 283                               std::vector<base::FilePath>* paths);
 284
 285   // The callback function for when the select folder dialog is opened.
 286   static int CALLBACK BrowseCallbackProc(HWND window, UINT message,
 287                                          LPARAM parameter,
 288                                          LPARAM data);
 289
 290   virtual bool HasMultipleFileTypeChoicesImpl() override;
 291
 292   // Returns the filter to be used while displaying the open/save file dialog.
 293   // This is computed from the extensions for the file types being opened.
 294   // |file_types| can be NULL in which case the returned filter will be empty.
 295   base::string16 GetFilterForFileTypes(const FileTypeInfo* file_types);
 296
 297   bool has_multiple_file_type_choices_;
 298   base::Callback<bool(OPENFILENAME*)> get_open_file_name_impl_;
 299   base::Callback<bool(OPENFILENAME*)> get_save_file_name_impl_;
 300
 301   DISALLOW_COPY_AND_ASSIGN(SelectFileDialogImpl);
 302 };
 303
 304 SelectFileDialogImpl::SelectFileDialogImpl(
 305     Listener* listener,
 306     ui::SelectFilePolicy* policy,
 307     const base::Callback<bool(OPENFILENAME*)>& get_open_file_name_impl,
 308     const base::Callback<bool(OPENFILENAME*)>& get_save_file_name_impl)
 309     : SelectFileDialog(listener, policy),
 310       BaseShellDialogImpl(),
 311       has_multiple_file_type_choices_(false),
 312       get_open_file_name_impl_(get_open_file_name_impl),
 313       get_save_file_name_impl_(get_save_file_name_impl) {
 314 }
 315
 316 SelectFileDialogImpl::~SelectFileDialogImpl() {
 317 }
 318
 319 void SelectFileDialogImpl::SelectFileImpl(
 320     Type type,
 321     const base::string16& title,
 322     const base::FilePath& default_path,
 323     const FileTypeInfo* file_types,
 324     int file_type_index,
 325     const base::FilePath::StringType& default_extension,
 326     gfx::NativeWindow owning_window,
 327     void* params) {
 328   has_multiple_file_type_choices_ =
 329       file_types ? file_types->extensions.size() > 1 : true;
 330   // If the owning_window passed in is in metro then we need to forward the
 331   // file open/save operations to metro.
 332   if (GetShellDialogsDelegate() &&
 333       GetShellDialogsDelegate()->IsWindowInMetro(owning_window)) {
 334     if (type == SELECT_SAVEAS_FILE) {
 335       win8::MetroViewerProcessHost::HandleSaveFile(
 336           title,
 337           default_path,
 338           GetFilterForFileTypes(file_types),
 339           file_type_index,
 340           default_extension,
 341           base::Bind(&ui::SelectFileDialog::Listener::FileSelected,
 342                      base::Unretained(listener_)),
 343           base::Bind(&ui::SelectFileDialog::Listener::FileSelectionCanceled,
 344                      base::Unretained(listener_)));
 345       return;
 346     } else if (type == SELECT_OPEN_FILE) {
 347       win8::MetroViewerProcessHost::HandleOpenFile(
 348           title,
 349           default_path,
 350           GetFilterForFileTypes(file_types),
 351           base::Bind(&ui::SelectFileDialog::Listener::FileSelected,
 352                      base::Unretained(listener_)),
 353           base::Bind(&ui::SelectFileDialog::Listener::FileSelectionCanceled,
 354                      base::Unretained(listener_)));
 355       return;
 356     } else if (type == SELECT_OPEN_MULTI_FILE) {
 357       win8::MetroViewerProcessHost::HandleOpenMultipleFiles(
 358           title,
 359           default_path,
 360           GetFilterForFileTypes(file_types),
 361           base::Bind(&ui::SelectFileDialog::Listener::MultiFilesSelected,
 362                      base::Unretained(listener_)),
 363           base::Bind(&ui::SelectFileDialog::Listener::FileSelectionCanceled,
 364                      base::Unretained(listener_)));
 365       return;
 366     } else if (type == SELECT_FOLDER || type == SELECT_UPLOAD_FOLDER) {
 367       base::string16 title_string = title;
 368       if (type == SELECT_UPLOAD_FOLDER && title_string.empty()) {
 369         // If it's for uploading don't use default dialog title to
 370         // make sure we clearly tell it's for uploading.
 371         title_string = l10n_util::GetStringUTF16(
 372             IDS_SELECT_UPLOAD_FOLDER_DIALOG_TITLE);
 373       }
 374       win8::MetroViewerProcessHost::HandleSelectFolder(
 375           title_string,
 376           base::Bind(&ui::SelectFileDialog::Listener::FileSelected,
 377                      base::Unretained(listener_)),
 378           base::Bind(&ui::SelectFileDialog::Listener::FileSelectionCanceled,
 379                      base::Unretained(listener_)));
 380       return;
 381     }
 382   }
 383   HWND owner = owning_window && owning_window->GetRootWindow()
 384       ? owning_window->GetHost()->GetAcceleratedWidget() : NULL;
 385
 386   ExecuteSelectParams execute_params(type, title,
 387                                      default_path, file_types, file_type_index,
 388                                      default_extension, BeginRun(owner),
 389                                      owner, params);
 390   execute_params.run_state.dialog_thread->message_loop()->PostTask(
 391       FROM_HERE,
 392       base::Bind(&SelectFileDialogImpl::ExecuteSelectFile, this,
 393                  execute_params));
 394 }
 395
 396 bool SelectFileDialogImpl::HasMultipleFileTypeChoicesImpl() {
 397   return has_multiple_file_type_choices_;
 398 }
 399
 400 bool SelectFileDialogImpl::IsRunning(gfx::NativeWindow owning_window) const {
 401   if (!owning_window->GetRootWindow())
 402     return false;
 403   HWND owner = owning_window->GetHost()->GetAcceleratedWidget();
 404   return listener_ && IsRunningDialogForOwner(owner);
 405 }
 406
 407 void SelectFileDialogImpl::ListenerDestroyed() {
 408   // Our associated listener has gone away, so we shouldn't call back to it if
 409   // our worker thread returns after the listener is dead.
 410   listener_ = NULL;
 411 }
 412
 413 void SelectFileDialogImpl::ExecuteSelectFile(
 414     const ExecuteSelectParams& params) {
 415   base::string16 filter = GetFilterForFileTypes(&params.file_types);
 416
 417   base::FilePath path = params.default_path;
 418   bool success = false;
 419   unsigned filter_index = params.file_type_index;
 420   if (params.type == SELECT_FOLDER || params.type == SELECT_UPLOAD_FOLDER) {
 421     std::wstring title = params.title;
 422     if (title.empty() && params.type == SELECT_UPLOAD_FOLDER) {
 423       // If it's for uploading don't use default dialog title to
 424       // make sure we clearly tell it's for uploading.
 425       title = l10n_util::GetStringUTF16(IDS_SELECT_UPLOAD_FOLDER_DIALOG_TITLE);
 426     }
 427     success = RunSelectFolderDialog(title,
 428                                     params.run_state.owner,
 429                                     &path);
 430   } else if (params.type == SELECT_SAVEAS_FILE) {
 431     std::wstring path_as_wstring = path.value();
 432     success = SaveFileAsWithFilter(params.run_state.owner,
 433         params.default_path.value(), filter,
 434         params.default_extension, false, &filter_index, &path_as_wstring);
 435     if (success)
 436       path = base::FilePath(path_as_wstring);
 437     DisableOwner(params.run_state.owner);
 438   } else if (params.type == SELECT_OPEN_FILE) {
 439     success = RunOpenFileDialog(params.title, filter,
 440                                 params.run_state.owner, &path);
 441   } else if (params.type == SELECT_OPEN_MULTI_FILE) {
 442     std::vector<base::FilePath> paths;
 443     if (RunOpenMultiFileDialog(params.title, filter,
 444                                params.run_state.owner, &paths)) {
 445       params.ui_proxy->PostTask(
 446           FROM_HERE,
 447           base::Bind(&SelectFileDialogImpl::MultiFilesSelected, this, paths,
 448                      params.params, params.run_state));
 449       return;
 450     }
 451   }
 452
 453   if (success) {
 454       params.ui_proxy->PostTask(
 455         FROM_HERE,
 456         base::Bind(&SelectFileDialogImpl::FileSelected, this, path,
 457                    filter_index, params.params, params.run_state));
 458   } else {
 459       params.ui_proxy->PostTask(
 460         FROM_HERE,
 461         base::Bind(&SelectFileDialogImpl::FileNotSelected, this, params.params,
 462                    params.run_state));
 463   }
 464 }
 465
 466 bool SelectFileDialogImpl::SaveFileAsWithFilter(
 467     HWND owner,
 468     const std::wstring& suggested_name,
 469     const std::wstring& filter,
 470     const std::wstring& def_ext,
 471     bool ignore_suggested_ext,
 472     unsigned* index,
 473     std::wstring* final_name) {
 474   DCHECK(final_name);
 475   // Having an empty filter makes for a bad user experience. We should always
 476   // specify a filter when saving.
 477   DCHECK(!filter.empty());
 478
 479   ui::win::OpenFileName save_as(owner,
 480                                 OFN_OVERWRITEPROMPT | OFN_EXPLORER |
 481                                     OFN_ENABLESIZING | OFN_NOCHANGEDIR |
 482                                     OFN_PATHMUSTEXIST);
 483
 484   const base::FilePath suggested_path = base::FilePath(suggested_name);
 485   if (!suggested_name.empty()) {
 486     base::FilePath suggested_file_name;
 487     base::FilePath suggested_directory;
 488     if (IsDirectory(suggested_path)) {
 489       suggested_directory = suggested_path;
 490     } else {
 491       suggested_directory = suggested_path.DirName();
 492       suggested_file_name = suggested_path.BaseName();
 493       // If the suggested_name is a root directory, file_part will be '\', and
 494       // the call to GetSaveFileName below will fail.
 495       if (suggested_file_name.value() == L"\\")
 496         suggested_file_name.clear();
 497     }
 498     save_as.SetInitialSelection(suggested_directory, suggested_file_name);
 499   }
 500
 501   save_as.GetOPENFILENAME()->lpstrFilter =
 502       filter.empty() ? NULL : filter.c_str();
 503   save_as.GetOPENFILENAME()->nFilterIndex = *index;
 504   save_as.GetOPENFILENAME()->lpstrDefExt = &def_ext[0];
 505   save_as.MaybeInstallWindowPositionHookForSaveAsOnXP();
 506
 507   if (!get_save_file_name_impl_.Run(save_as.GetOPENFILENAME()))
 508     return false;
 509
 510   // Return the user's choice.
 511   final_name->assign(save_as.GetOPENFILENAME()->lpstrFile);
 512   *index = save_as.GetOPENFILENAME()->nFilterIndex;
 513
 514   // Figure out what filter got selected. The filter index is 1-based.
 515   std::wstring filter_selected;
 516   if (*index > 0) {
 517     std::vector<Tuple<base::string16, base::string16>> filters =
 518         ui::win::OpenFileName::GetFilters(save_as.GetOPENFILENAME());
 519     if (*index > filters.size())
 520       NOTREACHED() << "Invalid filter index.";
 521     else
 522       filter_selected = get<1>(filters[*index - 1]);
 523   }
 524
 525   // Get the extension that was suggested to the user (when the Save As dialog
 526   // was opened). For saving web pages, we skip this step since there may be
 527   // 'extension characters' in the title of the web page.
 528   std::wstring suggested_ext;
 529   if (!ignore_suggested_ext)
 530     suggested_ext = GetExtensionWithoutLeadingDot(suggested_path.Extension());
 531
 532   // If we can't get the extension from the suggested_name, we use the default
 533   // extension passed in. This is to cover cases like when saving a web page,
 534   // where we get passed in a name without an extension and a default extension
 535   // along with it.
 536   if (suggested_ext.empty())
 537     suggested_ext = def_ext;
 538
 539   *final_name =
 540       ui::AppendExtensionIfNeeded(*final_name, filter_selected, suggested_ext);
 541   return true;
 542 }
 543
 544 void SelectFileDialogImpl::FileSelected(const base::FilePath& selected_folder,
 545                                         int index,
 546                                         void* params,
 547                                         RunState run_state) {
 548   if (listener_)
 549     listener_->FileSelected(selected_folder, index, params);
 550   EndRun(run_state);
 551 }
 552
 553 void SelectFileDialogImpl::MultiFilesSelected(
 554     const std::vector<base::FilePath>& selected_files,
 555     void* params,
 556     RunState run_state) {
 557   if (listener_)
 558     listener_->MultiFilesSelected(selected_files, params);
 559   EndRun(run_state);
 560 }
 561
 562 void SelectFileDialogImpl::FileNotSelected(void* params, RunState run_state) {
 563   if (listener_)
 564     listener_->FileSelectionCanceled(params);
 565   EndRun(run_state);
 566 }
 567
 568 int CALLBACK SelectFileDialogImpl::BrowseCallbackProc(HWND window,
 569                                                       UINT message,
 570                                                       LPARAM parameter,
 571                                                       LPARAM data) {
 572   if (message == BFFM_INITIALIZED) {
 573     // WParam is TRUE since passing a path.
 574     // data lParam member of the BROWSEINFO structure.
 575     SendMessage(window, BFFM_SETSELECTION, TRUE, (LPARAM)data);
 576   }
 577   return 0;
 578 }
 579
 580 bool SelectFileDialogImpl::RunSelectFolderDialog(const std::wstring& title,
 581                                                  HWND owner,
 582                                                  base::FilePath* path) {
 583   DCHECK(path);
 584
 585   wchar_t dir_buffer[MAX_PATH + 1];
 586
 587   bool result = false;
 588   BROWSEINFO browse_info = {0};
 589   browse_info.hwndOwner = owner;
 590   browse_info.lpszTitle = title.c_str();
 591   browse_info.pszDisplayName = dir_buffer;
 592   browse_info.ulFlags = BIF_USENEWUI | BIF_RETURNONLYFSDIRS;
 593
 594   if (path->value().length()) {
 595     // Highlight the current value.
 596     browse_info.lParam = (LPARAM)path->value().c_str();
 597     browse_info.lpfn = &BrowseCallbackProc;
 598   }
 599
 600   LPITEMIDLIST list = SHBrowseForFolder(&browse_info);
 601   DisableOwner(owner);
 602   if (list) {
 603     STRRET out_dir_buffer;
 604     ZeroMemory(&out_dir_buffer, sizeof(out_dir_buffer));
 605     out_dir_buffer.uType = STRRET_WSTR;
 606     base::win::ScopedComPtr<IShellFolder> shell_folder;
 607     if (SHGetDesktopFolder(shell_folder.Receive()) == NOERROR) {
 608       HRESULT hr = shell_folder->GetDisplayNameOf(list, SHGDN_FORPARSING,
 609                                                   &out_dir_buffer);
 610       if (SUCCEEDED(hr) && out_dir_buffer.uType == STRRET_WSTR) {
 611         *path = base::FilePath(out_dir_buffer.pOleStr);
 612         CoTaskMemFree(out_dir_buffer.pOleStr);
 613         result = true;
 614       } else {
 615         // Use old way if we don't get what we want.
 616         wchar_t old_out_dir_buffer[MAX_PATH + 1];
 617         if (SHGetPathFromIDList(list, old_out_dir_buffer)) {
 618           *path = base::FilePath(old_out_dir_buffer);
 619           result = true;
 620         }
 621       }
 622
 623       // According to MSDN, win2000 will not resolve shortcuts, so we do it
 624       // ourself.
 625       base::win::ResolveShortcut(*path, path, NULL);
 626     }
 627     CoTaskMemFree(list);
 628   }
 629   return result;
 630 }
 631
 632 bool SelectFileDialogImpl::RunOpenFileDialog(
 633     const std::wstring& title,
 634     const std::wstring& filter,
 635     HWND owner,
 636     base::FilePath* path) {
 637   // We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
 638   // without having to close Chrome first.
 639   ui::win::OpenFileName ofn(owner, OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR);
 640   if (!path->empty()) {
 641     if (IsDirectory(*path))
 642       ofn.SetInitialSelection(*path, base::FilePath());
 643     else
 644       ofn.SetInitialSelection(path->DirName(), path->BaseName());
 645   }
 646
 647   if (!filter.empty())
 648     ofn.GetOPENFILENAME()->lpstrFilter = filter.c_str();
 649
 650   bool success = get_open_file_name_impl_.Run(ofn.GetOPENFILENAME());
 651   DisableOwner(owner);
 652   if (success)
 653     *path = ofn.GetSingleResult();
 654   return success;
 655 }
 656
 657 bool SelectFileDialogImpl::RunOpenMultiFileDialog(
 658     const std::wstring& title,
 659     const std::wstring& filter,
 660     HWND owner,
 661     std::vector<base::FilePath>* paths) {
 662   // We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
 663   // without having to close Chrome first.
 664   ui::win::OpenFileName ofn(owner,
 665                             OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST |
 666                                 OFN_EXPLORER | OFN_HIDEREADONLY |
 667                                 OFN_ALLOWMULTISELECT | OFN_NOCHANGEDIR);
 668
 669   if (!filter.empty())
 670     ofn.GetOPENFILENAME()->lpstrFilter = filter.c_str();
 671
 672   base::FilePath directory;
 673   std::vector<base::FilePath> filenames;
 674
 675   if (get_open_file_name_impl_.Run(ofn.GetOPENFILENAME()))
 676     ofn.GetResult(&directory, &filenames);
 677
 678   DisableOwner(owner);
 679
 680   for (std::vector<base::FilePath>::iterator it = filenames.begin();
 681        it != filenames.end();
 682        ++it) {
 683     paths->push_back(directory.Append(*it));
 684   }
 685
 686   return !paths->empty();
 687 }
 688
 689 base::string16 SelectFileDialogImpl::GetFilterForFileTypes(
 690     const FileTypeInfo* file_types) {
 691   if (!file_types)
 692     return base::string16();
 693
 694   std::vector<base::string16> exts;
 695   for (size_t i = 0; i < file_types->extensions.size(); ++i) {
 696     const std::vector<base::string16>& inner_exts = file_types->extensions[i];
 697     base::string16 ext_string;
 698     for (size_t j = 0; j < inner_exts.size(); ++j) {
 699       if (!ext_string.empty())
 700         ext_string.push_back(L';');
 701       ext_string.append(L"*.");
 702       ext_string.append(inner_exts[j]);
 703     }
 704     exts.push_back(ext_string);
 705   }
 706   return FormatFilterForExtensions(
 707       exts,
 708       file_types->extension_description_overrides,
 709       file_types->include_all_files);
 710 }
 711
 712 }  // namespace
 713
 714 namespace ui {
 715
 716 // This function takes the output of a SaveAs dialog: a filename, a filter and
 717 // the extension originally suggested to the user (shown in the dialog box) and
 718 // returns back the filename with the appropriate extension tacked on. If the
 719 // user requests an unknown extension and is not using the 'All files' filter,
 720 // the suggested extension will be appended, otherwise we will leave the
 721 // filename unmodified. |filename| should contain the filename selected in the
 722 // SaveAs dialog box and may include the path, |filter_selected| should be
 723 // '*.something', for example '*.*' or it can be blank (which is treated as
 724 // *.*). |suggested_ext| should contain the extension without the dot (.) in
 725 // front, for example 'jpg'.
 726 std::wstring AppendExtensionIfNeeded(
 727     const std::wstring& filename,
 728     const std::wstring& filter_selected,
 729     const std::wstring& suggested_ext) {
 730   DCHECK(!filename.empty());
 731   std::wstring return_value = filename;
 732
 733   // If we wanted a specific extension, but the user's filename deleted it or
 734   // changed it to something that the system doesn't understand, re-append.
 735   // Careful: Checking net::GetMimeTypeFromExtension() will only find
 736   // extensions with a known MIME type, which many "known" extensions on Windows
 737   // don't have.  So we check directly for the "known extension" registry key.
 738   std::wstring file_extension(
 739       GetExtensionWithoutLeadingDot(base::FilePath(filename).Extension()));
 740   std::wstring key(L"." + file_extension);
 741   if (!(filter_selected.empty() || filter_selected == L"*.*") &&
 742       !base::win::RegKey(HKEY_CLASSES_ROOT, key.c_str(), KEY_READ).Valid() &&
 743       file_extension != suggested_ext) {
 744     if (return_value[return_value.length() - 1] != L'.')
 745       return_value.append(L".");
 746     return_value.append(suggested_ext);
 747   }
 748
 749   // Strip any trailing dots, which Windows doesn't allow.
 750   size_t index = return_value.find_last_not_of(L'.');
 751   if (index < return_value.size() - 1)
 752     return_value.resize(index + 1);
 753
 754   return return_value;
 755 }
 756
 757 SelectFileDialog* CreateWinSelectFileDialog(
 758     SelectFileDialog::Listener* listener,
 759     SelectFilePolicy* policy,
 760     const base::Callback<bool(OPENFILENAME* ofn)>& get_open_file_name_impl,
 761     const base::Callback<bool(OPENFILENAME* ofn)>& get_save_file_name_impl) {
 762   return new SelectFileDialogImpl(
 763       listener, policy, get_open_file_name_impl, get_save_file_name_impl);
 764 }
 765
 766 SelectFileDialog* CreateDefaultWinSelectFileDialog(
 767     SelectFileDialog::Listener* listener,
 768     SelectFilePolicy* policy) {
 769   return CreateWinSelectFileDialog(listener,
 770                                    policy,
 771                                    base::Bind(&CallBuiltinGetOpenFileName),
 772                                    base::Bind(&CallBuiltinGetSaveFileName));
 773 }
 774
 775 }  // namespace ui