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