src/ui/shell_dialogs/select_file_dialog_mac.mm

   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.h"
   6
   7 #import <Cocoa/Cocoa.h>
   8 #include <CoreServices/CoreServices.h>
   9
  10 #include <map>
  11 #include <set>
  12 #include <vector>
  13
  14 #include "base/file_util.h"
  15 #include "base/logging.h"
  16 #include "base/mac/bundle_locations.h"
  17 #include "base/mac/foundation_util.h"
  18 #include "base/mac/mac_util.h"
  19 #include "base/mac/scoped_cftyperef.h"
  20 #import "base/mac/scoped_nsobject.h"
  21 #include "base/strings/sys_string_conversions.h"
  22 #include "base/threading/thread_restrictions.h"
  23 #include "grit/ui_strings.h"
  24 #import "ui/base/cocoa/nib_loading.h"
  25 #include "ui/base/l10n/l10n_util_mac.h"
  26
  27 namespace {
  28
  29 const int kFileTypePopupTag = 1234;
  30
  31 CFStringRef CreateUTIFromExtension(const base::FilePath::StringType& ext) {
  32   base::ScopedCFTypeRef<CFStringRef> ext_cf(base::SysUTF8ToCFStringRef(ext));
  33   return UTTypeCreatePreferredIdentifierForTag(
  34       kUTTagClassFilenameExtension, ext_cf.get(), NULL);
  35 }
  36
  37 }  // namespace
  38
  39 class SelectFileDialogImpl;
  40
  41 // A bridge class to act as the modal delegate to the save/open sheet and send
  42 // the results to the C++ class.
  43 @interface SelectFileDialogBridge : NSObject<NSOpenSavePanelDelegate> {
  44  @private
  45   SelectFileDialogImpl* selectFileDialogImpl_;  // WEAK; owns us
  46 }
  47
  48 - (id)initWithSelectFileDialogImpl:(SelectFileDialogImpl*)s;
  49 - (void)endedPanel:(NSSavePanel*)panel
  50          didCancel:(bool)did_cancel
  51               type:(ui::SelectFileDialog::Type)type
  52       parentWindow:(NSWindow*)parentWindow;
  53
  54 // NSSavePanel delegate method
  55 - (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename;
  56
  57 @end
  58
  59 // Implementation of SelectFileDialog that shows Cocoa dialogs for choosing a
  60 // file or folder.
  61 class SelectFileDialogImpl : public ui::SelectFileDialog {
  62  public:
  63   explicit SelectFileDialogImpl(Listener* listener,
  64                                 ui::SelectFilePolicy* policy);
  65
  66   // BaseShellDialog implementation.
  67   virtual bool IsRunning(gfx::NativeWindow parent_window) const OVERRIDE;
  68   virtual void ListenerDestroyed() OVERRIDE;
  69
  70   // Callback from ObjC bridge.
  71   void FileWasSelected(NSSavePanel* dialog,
  72                        NSWindow* parent_window,
  73                        bool was_cancelled,
  74                        bool is_multi,
  75                        const std::vector<base::FilePath>& files,
  76                        int index);
  77
  78   bool ShouldEnableFilename(NSSavePanel* dialog, NSString* filename);
  79
  80  protected:
  81   // SelectFileDialog implementation.
  82   // |params| is user data we pass back via the Listener interface.
  83   virtual void SelectFileImpl(
  84       Type type,
  85       const base::string16& title,
  86       const base::FilePath& default_path,
  87       const FileTypeInfo* file_types,
  88       int file_type_index,
  89       const base::FilePath::StringType& default_extension,
  90       gfx::NativeWindow owning_window,
  91       void* params) OVERRIDE;
  92
  93  private:
  94   virtual ~SelectFileDialogImpl();
  95
  96   // Gets the accessory view for the save dialog.
  97   NSView* GetAccessoryView(const FileTypeInfo* file_types,
  98                            int file_type_index);
  99
 100   virtual bool HasMultipleFileTypeChoicesImpl() OVERRIDE;
 101
 102   // The bridge for results from Cocoa to return to us.
 103   base::scoped_nsobject<SelectFileDialogBridge> bridge_;
 104
 105   // A map from file dialogs to the |params| user data associated with them.
 106   std::map<NSSavePanel*, void*> params_map_;
 107
 108   // The set of all parent windows for which we are currently running dialogs.
 109   std::set<NSWindow*> parents_;
 110
 111   // A map from file dialogs to their types.
 112   std::map<NSSavePanel*, Type> type_map_;
 113
 114   bool hasMultipleFileTypeChoices_;
 115
 116   DISALLOW_COPY_AND_ASSIGN(SelectFileDialogImpl);
 117 };
 118
 119 SelectFileDialogImpl::SelectFileDialogImpl(Listener* listener,
 120                                            ui::SelectFilePolicy* policy)
 121     : SelectFileDialog(listener, policy),
 122       bridge_([[SelectFileDialogBridge alloc]
 123                initWithSelectFileDialogImpl:this]) {
 124 }
 125
 126 bool SelectFileDialogImpl::IsRunning(gfx::NativeWindow parent_window) const {
 127   return parents_.find(parent_window) != parents_.end();
 128 }
 129
 130 void SelectFileDialogImpl::ListenerDestroyed() {
 131   listener_ = NULL;
 132 }
 133
 134 void SelectFileDialogImpl::FileWasSelected(
 135     NSSavePanel* dialog,
 136     NSWindow* parent_window,
 137     bool was_cancelled,
 138     bool is_multi,
 139     const std::vector<base::FilePath>& files,
 140     int index) {
 141   void* params = params_map_[dialog];
 142   params_map_.erase(dialog);
 143   parents_.erase(parent_window);
 144   type_map_.erase(dialog);
 145
 146   [dialog setDelegate:nil];
 147
 148   if (!listener_)
 149     return;
 150
 151   if (was_cancelled || files.empty()) {
 152     listener_->FileSelectionCanceled(params);
 153   } else {
 154     if (is_multi) {
 155       listener_->MultiFilesSelected(files, params);
 156     } else {
 157       listener_->FileSelected(files[0], index, params);
 158     }
 159   }
 160 }
 161
 162 bool SelectFileDialogImpl::ShouldEnableFilename(NSSavePanel* dialog,
 163                                                 NSString* filename) {
 164   // If this is a single open file dialog, disable selecting packages.
 165   if (type_map_[dialog] != SELECT_OPEN_FILE)
 166     return true;
 167
 168   return ![[NSWorkspace sharedWorkspace] isFilePackageAtPath:filename];
 169 }
 170
 171 void SelectFileDialogImpl::SelectFileImpl(
 172     Type type,
 173     const base::string16& title,
 174     const base::FilePath& default_path,
 175     const FileTypeInfo* file_types,
 176     int file_type_index,
 177     const base::FilePath::StringType& default_extension,
 178     gfx::NativeWindow owning_window,
 179     void* params) {
 180   DCHECK(type == SELECT_FOLDER ||
 181          type == SELECT_UPLOAD_FOLDER ||
 182          type == SELECT_OPEN_FILE ||
 183          type == SELECT_OPEN_MULTI_FILE ||
 184          type == SELECT_SAVEAS_FILE);
 185   parents_.insert(owning_window);
 186
 187   // Note: we need to retain the dialog as owning_window can be null.
 188   // (See http://crbug.com/29213 .)
 189   NSSavePanel* dialog;
 190   if (type == SELECT_SAVEAS_FILE)
 191     dialog = [[NSSavePanel savePanel] retain];
 192   else
 193     dialog = [[NSOpenPanel openPanel] retain];
 194
 195   if (!title.empty())
 196     [dialog setTitle:base::SysUTF16ToNSString(title)];
 197
 198   NSString* default_dir = nil;
 199   NSString* default_filename = nil;
 200   if (!default_path.empty()) {
 201     // The file dialog is going to do a ton of stats anyway. Not much
 202     // point in eliminating this one.
 203     base::ThreadRestrictions::ScopedAllowIO allow_io;
 204     if (base::DirectoryExists(default_path)) {
 205       default_dir = base::SysUTF8ToNSString(default_path.value());
 206     } else {
 207       default_dir = base::SysUTF8ToNSString(default_path.DirName().value());
 208       default_filename =
 209           base::SysUTF8ToNSString(default_path.BaseName().value());
 210     }
 211   }
 212
 213   NSArray* allowed_file_types = nil;
 214   if (file_types) {
 215     if (!file_types->extensions.empty()) {
 216       // While the example given in the header for FileTypeInfo lists an example
 217       // |file_types->extensions| value as
 218       //   { { "htm", "html" }, { "txt" } }
 219       // it is not always the case that the given extensions in one of the sub-
 220       // lists are all synonyms. In fact, in the case of a <select> element with
 221       // multiple "accept" types, all the extensions allowed for all the types
 222       // will be part of one list. To be safe, allow the types of all the
 223       // specified extensions.
 224       NSMutableSet* file_type_set = [NSMutableSet set];
 225       for (size_t i = 0; i < file_types->extensions.size(); ++i) {
 226         const std::vector<base::FilePath::StringType>& ext_list =
 227             file_types->extensions[i];
 228         for (size_t j = 0; j < ext_list.size(); ++j) {
 229           base::ScopedCFTypeRef<CFStringRef> uti(
 230               CreateUTIFromExtension(ext_list[j]));
 231           [file_type_set addObject:base::mac::CFToNSCast(uti.get())];
 232
 233           // Always allow the extension itself, in case the UTI doesn't map
 234           // back to the original extension correctly. This occurs with dynamic
 235           // UTIs on 10.7 and 10.8.
 236           // See http://crbug.com/148840, http://openradar.me/12316273
 237           base::ScopedCFTypeRef<CFStringRef> ext_cf(
 238               base::SysUTF8ToCFStringRef(ext_list[j]));
 239           [file_type_set addObject:base::mac::CFToNSCast(ext_cf.get())];
 240         }
 241       }
 242       allowed_file_types = [file_type_set allObjects];
 243     }
 244     if (type == SELECT_SAVEAS_FILE)
 245       [dialog setAllowedFileTypes:allowed_file_types];
 246     // else we'll pass it in when we run the open panel
 247
 248     if (file_types->include_all_files || file_types->extensions.empty())
 249       [dialog setAllowsOtherFileTypes:YES];
 250
 251     if (file_types->extension_description_overrides.size() > 1) {
 252       NSView* accessory_view = GetAccessoryView(file_types, file_type_index);
 253       [dialog setAccessoryView:accessory_view];
 254     }
 255   } else {
 256     // If no type info is specified, anything goes.
 257     [dialog setAllowsOtherFileTypes:YES];
 258   }
 259   hasMultipleFileTypeChoices_ =
 260       file_types ? file_types->extensions.size() > 1 : true;
 261
 262   if (!default_extension.empty())
 263     [dialog setAllowedFileTypes:@[base::SysUTF8ToNSString(default_extension)]];
 264
 265   params_map_[dialog] = params;
 266   type_map_[dialog] = type;
 267
 268   if (type == SELECT_SAVEAS_FILE) {
 269     [dialog setCanSelectHiddenExtension:YES];
 270   } else {
 271     NSOpenPanel* open_dialog = (NSOpenPanel*)dialog;
 272
 273     if (type == SELECT_OPEN_MULTI_FILE)
 274       [open_dialog setAllowsMultipleSelection:YES];
 275     else
 276       [open_dialog setAllowsMultipleSelection:NO];
 277
 278     if (type == SELECT_FOLDER || type == SELECT_UPLOAD_FOLDER) {
 279       [open_dialog setCanChooseFiles:NO];
 280       [open_dialog setCanChooseDirectories:YES];
 281       [open_dialog setCanCreateDirectories:YES];
 282       NSString *prompt = (type == SELECT_UPLOAD_FOLDER)
 283           ? l10n_util::GetNSString(IDS_SELECT_UPLOAD_FOLDER_BUTTON_TITLE)
 284           : l10n_util::GetNSString(IDS_SELECT_FOLDER_BUTTON_TITLE);
 285       [open_dialog setPrompt:prompt];
 286     } else {
 287       [open_dialog setCanChooseFiles:YES];
 288       [open_dialog setCanChooseDirectories:NO];
 289     }
 290
 291     [open_dialog setDelegate:bridge_.get()];
 292     [open_dialog setAllowedFileTypes:allowed_file_types];
 293   }
 294   if (default_dir)
 295     [dialog setDirectoryURL:[NSURL fileURLWithPath:default_dir]];
 296   if (default_filename)
 297     [dialog setNameFieldStringValue:default_filename];
 298   [dialog beginSheetModalForWindow:owning_window
 299                  completionHandler:^(NSInteger result) {
 300     [bridge_.get() endedPanel:dialog
 301                     didCancel:result != NSFileHandlingPanelOKButton
 302                          type:type
 303                  parentWindow:owning_window];
 304   }];
 305 }
 306
 307 SelectFileDialogImpl::~SelectFileDialogImpl() {
 308   // Walk through the open dialogs and close them all.  Use a temporary vector
 309   // to hold the pointers, since we can't delete from the map as we're iterating
 310   // through it.
 311   std::vector<NSSavePanel*> panels;
 312   for (std::map<NSSavePanel*, void*>::iterator it = params_map_.begin();
 313        it != params_map_.end(); ++it) {
 314     panels.push_back(it->first);
 315   }
 316
 317   for (std::vector<NSSavePanel*>::iterator it = panels.begin();
 318        it != panels.end(); ++it) {
 319     [*it cancel:*it];
 320   }
 321 }
 322
 323 NSView* SelectFileDialogImpl::GetAccessoryView(const FileTypeInfo* file_types,
 324                                                int file_type_index) {
 325   DCHECK(file_types);
 326   NSView* accessory_view = ui::GetViewFromNib(@"SaveAccessoryView");
 327   if (!accessory_view)
 328     return nil;
 329
 330   NSPopUpButton* popup = [accessory_view viewWithTag:kFileTypePopupTag];
 331   DCHECK(popup);
 332
 333   size_t type_count = file_types->extensions.size();
 334   for (size_t type = 0; type < type_count; ++type) {
 335     NSString* type_description;
 336     if (type < file_types->extension_description_overrides.size()) {
 337       type_description = base::SysUTF16ToNSString(
 338           file_types->extension_description_overrides[type]);
 339     } else {
 340       // No description given for a list of extensions; pick the first one from
 341       // the list (arbitrarily) and use its description.
 342       const std::vector<base::FilePath::StringType>& ext_list =
 343           file_types->extensions[type];
 344       DCHECK(!ext_list.empty());
 345       base::ScopedCFTypeRef<CFStringRef> uti(
 346           CreateUTIFromExtension(ext_list[0]));
 347       base::ScopedCFTypeRef<CFStringRef> description(
 348           UTTypeCopyDescription(uti.get()));
 349
 350       type_description =
 351           [[base::mac::CFToNSCast(description.get()) retain] autorelease];
 352     }
 353     [popup addItemWithTitle:type_description];
 354   }
 355
 356   [popup selectItemAtIndex:file_type_index - 1];  // 1-based
 357   return accessory_view;
 358 }
 359
 360 bool SelectFileDialogImpl::HasMultipleFileTypeChoicesImpl() {
 361   return hasMultipleFileTypeChoices_;
 362 }
 363
 364 @implementation SelectFileDialogBridge
 365
 366 - (id)initWithSelectFileDialogImpl:(SelectFileDialogImpl*)s {
 367   self = [super init];
 368   if (self != nil) {
 369     selectFileDialogImpl_ = s;
 370   }
 371   return self;
 372 }
 373
 374 - (void)endedPanel:(NSSavePanel*)panel
 375          didCancel:(bool)did_cancel
 376               type:(ui::SelectFileDialog::Type)type
 377       parentWindow:(NSWindow*)parentWindow {
 378   int index = 0;
 379   std::vector<base::FilePath> paths;
 380   if (!did_cancel) {
 381     if (type == ui::SelectFileDialog::SELECT_SAVEAS_FILE) {
 382       if ([[panel URL] isFileURL]) {
 383         paths.push_back(base::mac::NSStringToFilePath([[panel URL] path]));
 384       }
 385
 386       NSView* accessoryView = [panel accessoryView];
 387       if (accessoryView) {
 388         NSPopUpButton* popup = [accessoryView viewWithTag:kFileTypePopupTag];
 389         if (popup) {
 390           // File type indexes are 1-based.
 391           index = [popup indexOfSelectedItem] + 1;
 392         }
 393       } else {
 394         index = 1;
 395       }
 396     } else {
 397       CHECK([panel isKindOfClass:[NSOpenPanel class]]);
 398       NSArray* urls = [static_cast<NSOpenPanel*>(panel) URLs];
 399       for (NSURL* url in urls)
 400         if ([url isFileURL])
 401           paths.push_back(base::FilePath(base::SysNSStringToUTF8([url path])));
 402     }
 403   }
 404
 405   bool isMulti = type == ui::SelectFileDialog::SELECT_OPEN_MULTI_FILE;
 406   selectFileDialogImpl_->FileWasSelected(panel,
 407                                          parentWindow,
 408                                          did_cancel,
 409                                          isMulti,
 410                                          paths,
 411                                          index);
 412   [panel release];
 413 }
 414
 415 - (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename {
 416   return selectFileDialogImpl_->ShouldEnableFilename(sender, filename);
 417 }
 418
 419 @end
 420
 421 namespace ui {
 422
 423 SelectFileDialog* CreateMacSelectFileDialog(
 424     SelectFileDialog::Listener* listener,
 425     SelectFilePolicy* policy) {
 426   return new SelectFileDialogImpl(listener, policy);
 427 }
 428
 429 }  // namespace ui