Add m-esr52 at 52.6.0

1 files changed, 676 insertions, 0 deletions

diff --git a/widget/cocoa/nsFilePicker.mm b/widget/cocoa/nsFilePicker.mm
new file mode 100644
index 000000000..5213dee24
--- /dev/null
+++ b/widget/cocoa/nsFilePicker.mm
@@ -0,0 +1,676 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#import <Cocoa/Cocoa.h>
+
+#include "nsFilePicker.h"
+#include "nsCOMPtr.h"
+#include "nsReadableUtils.h"
+#include "nsNetUtil.h"
+#include "nsIComponentManager.h"
+#include "nsIFile.h"
+#include "nsILocalFileMac.h"
+#include "nsIURL.h"
+#include "nsArrayEnumerator.h"
+#include "nsIStringBundle.h"
+#include "nsCocoaUtils.h"
+#include "mozilla/Preferences.h"
+
+// This must be included last:
+#include "nsObjCExceptions.h"
+
+using namespace mozilla;
+
+const float kAccessoryViewPadding = 5;
+const int   kSaveTypeControlTag = 1;
+
+static bool gCallSecretHiddenFileAPI = false;
+const char kShowHiddenFilesPref[] = "filepicker.showHiddenFiles";
+
+/**
+ * This class is an observer of NSPopUpButton selection change.
+ */
+@interface NSPopUpButtonObserver : NSObject
+{
+  NSPopUpButton* mPopUpButton;
+  NSOpenPanel*   mOpenPanel;
+  nsFilePicker*  mFilePicker;
+}
+- (void) setPopUpButton:(NSPopUpButton*)aPopUpButton;
+- (void) setOpenPanel:(NSOpenPanel*)aOpenPanel;
+- (void) setFilePicker:(nsFilePicker*)aFilePicker;
+- (void) menuChangedItem:(NSNotification*)aSender;
+@end
+
+NS_IMPL_ISUPPORTS(nsFilePicker, nsIFilePicker)
+
+// We never want to call the secret show hidden files API unless the pref
+// has been set. Once the pref has been set we always need to call it even
+// if it disappears so that we stop showing hidden files if a user deletes
+// the pref. If the secret API was used once and things worked out it should
+// continue working for subsequent calls so the user is at no more risk.
+static void SetShowHiddenFileState(NSSavePanel* panel)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
+
+  bool show = false;
+  if (NS_SUCCEEDED(Preferences::GetBool(kShowHiddenFilesPref, &show))) {
+    gCallSecretHiddenFileAPI = true;
+  }
+
+  if (gCallSecretHiddenFileAPI) {
+    // invoke a method to get a Cocoa-internal nav view
+    SEL navViewSelector = @selector(_navView);
+    NSMethodSignature* navViewSignature = [panel methodSignatureForSelector:navViewSelector];
+    if (!navViewSignature)
+      return;
+    NSInvocation* navViewInvocation = [NSInvocation invocationWithMethodSignature:navViewSignature];
+    [navViewInvocation setSelector:navViewSelector];
+    [navViewInvocation setTarget:panel];
+    [navViewInvocation invoke];
+
+    // get the returned nav view
+    id navView = nil;
+    [navViewInvocation getReturnValue:&navView];
+
+    // invoke the secret show hidden file state method on the nav view
+    SEL showHiddenFilesSelector = @selector(setShowsHiddenFiles:);
+    NSMethodSignature* showHiddenFilesSignature = [navView methodSignatureForSelector:showHiddenFilesSelector];
+    if (!showHiddenFilesSignature)
+      return;
+    NSInvocation* showHiddenFilesInvocation = [NSInvocation invocationWithMethodSignature:showHiddenFilesSignature];
+    [showHiddenFilesInvocation setSelector:showHiddenFilesSelector];
+    [showHiddenFilesInvocation setTarget:navView];
+    [showHiddenFilesInvocation setArgument:&show atIndex:2];
+    [showHiddenFilesInvocation invoke];
+  }
+
+  NS_OBJC_END_TRY_ABORT_BLOCK;
+}
+
+nsFilePicker::nsFilePicker()
+: mSelectedTypeIndex(0)
+{
+}
+
+nsFilePicker::~nsFilePicker()
+{
+}
+
+void
+nsFilePicker::InitNative(nsIWidget *aParent, const nsAString& aTitle)
+{
+  mTitle = aTitle;
+}
+
+NSView* nsFilePicker::GetAccessoryView()
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  NSView* accessoryView = [[[NSView alloc] initWithFrame:NSMakeRect(0, 0, 0, 0)] autorelease];
+
+  // Set a label's default value.
+  NSString* label = @"Format:";
+
+  // Try to get the localized string.
+  nsCOMPtr<nsIStringBundleService> sbs = do_GetService(NS_STRINGBUNDLE_CONTRACTID);
+  nsCOMPtr<nsIStringBundle> bundle;
+  nsresult rv = sbs->CreateBundle("chrome://global/locale/filepicker.properties", getter_AddRefs(bundle));
+  if (NS_SUCCEEDED(rv)) {
+    nsXPIDLString locaLabel;
+    bundle->GetStringFromName(u"formatLabel", getter_Copies(locaLabel));
+    if (locaLabel) {
+      label = [NSString stringWithCharacters:reinterpret_cast<const unichar*>(locaLabel.get())
+                                      length:locaLabel.Length()];
+    }
+  }
+
+  // set up label text field
+  NSTextField* textField = [[[NSTextField alloc] init] autorelease];
+  [textField setEditable:NO];
+  [textField setSelectable:NO];
+  [textField setDrawsBackground:NO];
+  [textField setBezeled:NO];
+  [textField setBordered:NO];
+  [textField setFont:[NSFont labelFontOfSize:13.0]];
+  [textField setStringValue:label];
+  [textField setTag:0];
+  [textField sizeToFit];
+
+  // set up popup button
+  NSPopUpButton* popupButton = [[[NSPopUpButton alloc] initWithFrame:NSMakeRect(0, 0, 0, 0) pullsDown:NO] autorelease];
+  uint32_t numMenuItems = mTitles.Length();
+  for (uint32_t i = 0; i < numMenuItems; i++) {
+    const nsString& currentTitle = mTitles[i];
+    NSString *titleString;
+    if (currentTitle.IsEmpty()) {
+      const nsString& currentFilter = mFilters[i];
+      titleString = [[NSString alloc] initWithCharacters:reinterpret_cast<const unichar*>(currentFilter.get())
+                                                  length:currentFilter.Length()];
+    }
+    else {
+      titleString = [[NSString alloc] initWithCharacters:reinterpret_cast<const unichar*>(currentTitle.get())
+                                                  length:currentTitle.Length()];
+    }
+    [popupButton addItemWithTitle:titleString];
+    [titleString release];
+  }
+  if (mSelectedTypeIndex >= 0 && (uint32_t)mSelectedTypeIndex < numMenuItems)
+    [popupButton selectItemAtIndex:mSelectedTypeIndex];
+  [popupButton setTag:kSaveTypeControlTag];
+  [popupButton sizeToFit]; // we have to do sizeToFit to get the height calculated for us
+  // This is just a default width that works well, doesn't truncate the vast majority of
+  // things that might end up in the menu.
+  [popupButton setFrameSize:NSMakeSize(180, [popupButton frame].size.height)];
+
+  // position everything based on control sizes with kAccessoryViewPadding pix padding
+  // on each side kAccessoryViewPadding pix horizontal padding between controls
+  float greatestHeight = [textField frame].size.height;
+  if ([popupButton frame].size.height > greatestHeight)
+    greatestHeight = [popupButton frame].size.height;
+  float totalViewHeight = greatestHeight + kAccessoryViewPadding * 2;
+  float totalViewWidth  = [textField frame].size.width + [popupButton frame].size.width + kAccessoryViewPadding * 3;
+  [accessoryView setFrameSize:NSMakeSize(totalViewWidth, totalViewHeight)];
+
+  float textFieldOriginY = ((greatestHeight - [textField frame].size.height) / 2 + 1) + kAccessoryViewPadding;
+  [textField setFrameOrigin:NSMakePoint(kAccessoryViewPadding, textFieldOriginY)];
+  
+  float popupOriginX = [textField frame].size.width + kAccessoryViewPadding * 2;
+  float popupOriginY = ((greatestHeight - [popupButton frame].size.height) / 2) + kAccessoryViewPadding;
+  [popupButton setFrameOrigin:NSMakePoint(popupOriginX, popupOriginY)];
+
+  [accessoryView addSubview:textField];
+  [accessoryView addSubview:popupButton];
+  return accessoryView;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+// Display the file dialog
+NS_IMETHODIMP nsFilePicker::Show(int16_t *retval)
+{
+  NS_ENSURE_ARG_POINTER(retval);
+
+  *retval = returnCancel;
+
+  int16_t userClicksOK = returnCancel;
+
+// Random questions from DHH:
+//
+// Why do we pass mTitle, mDefault to the functions?  Can GetLocalFile. PutLocalFile,
+// and GetLocalFolder get called someplace else?  It generates a bunch of warnings
+// as it is right now.
+//
+// I think we could easily combine GetLocalFile and GetLocalFolder together, just
+// setting panel pick options based on mMode.  I didn't do it here b/c I wanted to 
+// make this look as much like Carbon nsFilePicker as possible.  
+
+  mFiles.Clear();
+  nsCOMPtr<nsIFile> theFile;
+
+  switch (mMode)
+  {
+    case modeOpen:
+      userClicksOK = GetLocalFiles(mTitle, false, mFiles);
+      break;
+    
+    case modeOpenMultiple:
+      userClicksOK = GetLocalFiles(mTitle, true, mFiles);
+      break;
+      
+    case modeSave:
+      userClicksOK = PutLocalFile(mTitle, mDefault, getter_AddRefs(theFile));
+      break;
+      
+    case modeGetFolder:
+      userClicksOK = GetLocalFolder(mTitle, getter_AddRefs(theFile));
+      break;
+    
+    default:
+      NS_ERROR("Unknown file picker mode");
+      break;
+  }
+
+  if (theFile)
+    mFiles.AppendObject(theFile);
+  
+  *retval = userClicksOK;
+  return NS_OK;
+}
+
+static
+void UpdatePanelFileTypes(NSOpenPanel* aPanel, NSArray* aFilters)
+{
+  // If we show all file types, also "expose" bundles' contents.
+  [aPanel setTreatsFilePackagesAsDirectories:!aFilters];
+
+  [aPanel setAllowedFileTypes:aFilters];
+}
+
+@implementation NSPopUpButtonObserver
+- (void) setPopUpButton:(NSPopUpButton*)aPopUpButton
+{
+  mPopUpButton = aPopUpButton;
+}
+
+- (void) setOpenPanel:(NSOpenPanel*)aOpenPanel
+{
+  mOpenPanel = aOpenPanel;
+}
+
+- (void) setFilePicker:(nsFilePicker*)aFilePicker
+{
+  mFilePicker = aFilePicker;
+}
+
+- (void) menuChangedItem:(NSNotification *)aSender
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
+  int32_t selectedItem = [mPopUpButton indexOfSelectedItem];
+  if (selectedItem < 0) {
+    return;
+  }
+
+  mFilePicker->SetFilterIndex(selectedItem);
+  UpdatePanelFileTypes(mOpenPanel, mFilePicker->GetFilterList());
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN();
+}
+@end
+
+// Use OpenPanel to do a GetFile. Returns |returnOK| if the user presses OK in the dialog. 
+int16_t
+nsFilePicker::GetLocalFiles(const nsString& inTitle, bool inAllowMultiple, nsCOMArray<nsIFile>& outFiles)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
+
+  int16_t retVal = (int16_t)returnCancel;
+  NSOpenPanel *thePanel = [NSOpenPanel openPanel];
+
+  SetShowHiddenFileState(thePanel);
+
+  // Set the options for how the get file dialog will appear
+  SetDialogTitle(inTitle, thePanel);
+  [thePanel setAllowsMultipleSelection:inAllowMultiple];
+  [thePanel setCanSelectHiddenExtension:YES];
+  [thePanel setCanChooseDirectories:NO];
+  [thePanel setCanChooseFiles:YES];
+  [thePanel setResolvesAliases:YES]; //this is default - probably doesn't need to be set
+  
+  // Get filters
+  // filters may be null, if we should allow all file types.
+  NSArray *filters = GetFilterList();
+
+  // set up default directory
+  NSString *theDir = PanelDefaultDirectory();
+  
+  // if this is the "Choose application..." dialog, and no other start
+  // dir has been set, then use the Applications folder.
+  if (!theDir) {
+    if (filters && [filters count] == 1 &&
+        [(NSString *)[filters objectAtIndex:0] isEqualToString:@"app"])
+      theDir = @"/Applications/";
+    else
+      theDir = @"";
+  }
+
+  if (theDir) {
+    [thePanel setDirectoryURL:[NSURL fileURLWithPath:theDir isDirectory:YES]];
+  }
+
+  int result;
+  nsCocoaUtils::PrepareForNativeAppModalDialog();
+  if (mFilters.Length() > 1) {
+    // [NSURL initWithString:] (below) throws an exception if URLString is nil.
+
+    NSPopUpButtonObserver* observer = [[NSPopUpButtonObserver alloc] init];
+
+    NSView* accessoryView = GetAccessoryView();
+    [thePanel setAccessoryView:accessoryView];
+
+    [observer setPopUpButton:[accessoryView viewWithTag:kSaveTypeControlTag]];
+    [observer setOpenPanel:thePanel];
+    [observer setFilePicker:this];
+
+    [[NSNotificationCenter defaultCenter]
+      addObserver:observer
+      selector:@selector(menuChangedItem:)
+      name:NSMenuWillSendActionNotification object:nil];
+
+    UpdatePanelFileTypes(thePanel, filters);
+    result = [thePanel runModal];
+
+    [[NSNotificationCenter defaultCenter] removeObserver:observer];
+    [observer release];
+  } else {
+    // If we show all file types, also "expose" bundles' contents.
+    if (!filters) {
+      [thePanel setTreatsFilePackagesAsDirectories:YES];
+    }
+    [thePanel setAllowedFileTypes:filters];
+    result = [thePanel runModal];
+  }
+  nsCocoaUtils::CleanUpAfterNativeAppModalDialog();
+  
+  if (result == NSFileHandlingPanelCancelButton)
+    return retVal;
+
+  // Converts data from a NSArray of NSURL to the returned format.
+  // We should be careful to not call [thePanel URLs] more than once given that
+  // it creates a new array each time.
+  // We are using Fast Enumeration, thus the NSURL array is created once then
+  // iterated.
+  for (NSURL* url in [thePanel URLs]) {
+    if (!url) {
+      continue;
+    }
+
+    nsCOMPtr<nsIFile> localFile;
+    NS_NewLocalFile(EmptyString(), true, getter_AddRefs(localFile));
+    nsCOMPtr<nsILocalFileMac> macLocalFile = do_QueryInterface(localFile);
+    if (macLocalFile && NS_SUCCEEDED(macLocalFile->InitWithCFURL((CFURLRef)url))) {
+      outFiles.AppendObject(localFile);
+    }
+  }
+
+  if (outFiles.Count() > 0)
+    retVal = returnOK;
+
+  return retVal;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(0);
+}
+
+// Use OpenPanel to do a GetFolder. Returns |returnOK| if the user presses OK in the dialog.
+int16_t
+nsFilePicker::GetLocalFolder(const nsString& inTitle, nsIFile** outFile)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
+  NS_ASSERTION(outFile, "this protected member function expects a null initialized out pointer");
+  
+  int16_t retVal = (int16_t)returnCancel;
+  NSOpenPanel *thePanel = [NSOpenPanel openPanel];
+
+  SetShowHiddenFileState(thePanel);
+
+  // Set the options for how the get file dialog will appear
+  SetDialogTitle(inTitle, thePanel);
+  [thePanel setAllowsMultipleSelection:NO];   //this is default -probably doesn't need to be set
+  [thePanel setCanSelectHiddenExtension:YES];
+  [thePanel setCanChooseDirectories:YES];
+  [thePanel setCanChooseFiles:NO];
+  [thePanel setResolvesAliases:YES];          //this is default - probably doesn't need to be set
+  [thePanel setCanCreateDirectories:YES];
+  
+  // packages != folders
+  [thePanel setTreatsFilePackagesAsDirectories:NO];
+
+  // set up default directory
+  NSString *theDir = PanelDefaultDirectory();
+  if (theDir) {
+    [thePanel setDirectoryURL:[NSURL fileURLWithPath:theDir isDirectory:YES]];
+  }
+  nsCocoaUtils::PrepareForNativeAppModalDialog();
+  int result = [thePanel runModal];
+  nsCocoaUtils::CleanUpAfterNativeAppModalDialog();
+
+  if (result == NSFileHandlingPanelCancelButton)
+    return retVal;
+
+  // get the path for the folder (we allow just 1, so that's all we get)
+  NSURL *theURL = [[thePanel URLs] objectAtIndex:0];
+  if (theURL) {
+    nsCOMPtr<nsIFile> localFile;
+    NS_NewLocalFile(EmptyString(), true, getter_AddRefs(localFile));
+    nsCOMPtr<nsILocalFileMac> macLocalFile = do_QueryInterface(localFile);
+    if (macLocalFile && NS_SUCCEEDED(macLocalFile->InitWithCFURL((CFURLRef)theURL))) {
+      *outFile = localFile;
+      NS_ADDREF(*outFile);
+      retVal = returnOK;
+    }
+  }
+
+  return retVal;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(0);
+}
+
+// Returns |returnOK| if the user presses OK in the dialog.
+int16_t
+nsFilePicker::PutLocalFile(const nsString& inTitle, const nsString& inDefaultName, nsIFile** outFile)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
+  NS_ASSERTION(outFile, "this protected member function expects a null initialized out pointer");
+
+  int16_t retVal = returnCancel;
+  NSSavePanel *thePanel = [NSSavePanel savePanel];
+
+  SetShowHiddenFileState(thePanel);
+
+  SetDialogTitle(inTitle, thePanel);
+
+  // set up accessory view for file format options
+  NSView* accessoryView = GetAccessoryView();
+  [thePanel setAccessoryView:accessoryView];
+
+  // set up default file name
+  NSString* defaultFilename = [NSString stringWithCharacters:(const unichar*)inDefaultName.get() length:inDefaultName.Length()];
+
+  // set up allowed types; this prevents the extension from being selected
+  // use the UTI for the file type to allow alternate extensions (e.g., jpg vs. jpeg)
+  NSString* extension = defaultFilename.pathExtension;
+  if (extension.length != 0) {
+    CFStringRef type = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (CFStringRef)extension, NULL);
+
+    if (type) {
+      thePanel.allowedFileTypes = @[(NSString*)type];
+      CFRelease(type);
+    } else {
+      // if there's no UTI for the file extension, use the extension itself.
+      thePanel.allowedFileTypes = @[extension];
+    }
+  }
+  // Allow users to change the extension.
+  thePanel.allowsOtherFileTypes = YES;
+
+  // set up default directory
+  NSString *theDir = PanelDefaultDirectory();
+  if (theDir) {
+    [thePanel setDirectoryURL:[NSURL fileURLWithPath:theDir isDirectory:YES]];
+  }
+
+  // load the panel
+  nsCocoaUtils::PrepareForNativeAppModalDialog();
+  [thePanel setNameFieldStringValue:defaultFilename];
+  int result = [thePanel runModal];
+  nsCocoaUtils::CleanUpAfterNativeAppModalDialog();
+  if (result == NSFileHandlingPanelCancelButton)
+    return retVal;
+
+  // get the save type
+  NSPopUpButton* popupButton = [accessoryView viewWithTag:kSaveTypeControlTag];
+  if (popupButton) {
+    mSelectedTypeIndex = [popupButton indexOfSelectedItem];
+  }
+
+  NSURL* fileURL = [thePanel URL];
+  if (fileURL) { 
+    nsCOMPtr<nsIFile> localFile;
+    NS_NewLocalFile(EmptyString(), true, getter_AddRefs(localFile));
+    nsCOMPtr<nsILocalFileMac> macLocalFile = do_QueryInterface(localFile);
+    if (macLocalFile && NS_SUCCEEDED(macLocalFile->InitWithCFURL((CFURLRef)fileURL))) {
+      *outFile = localFile;
+      NS_ADDREF(*outFile);
+      // We tell if we are replacing or not by just looking to see if the file exists.
+      // The user could not have hit OK and not meant to replace the file.
+      if ([[NSFileManager defaultManager] fileExistsAtPath:[fileURL path]])
+        retVal = returnReplace;
+      else
+        retVal = returnOK;
+    }
+  }
+
+  return retVal;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(0);
+}
+
+NSArray *
+nsFilePicker::GetFilterList()
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  if (!mFilters.Length()) {
+    return nil;
+  }
+
+  if (mFilters.Length() <= (uint32_t)mSelectedTypeIndex) {
+    NS_WARNING("An out of range index has been selected. Using the first index instead.");
+    mSelectedTypeIndex = 0;
+  }
+
+  const nsString& filterWide = mFilters[mSelectedTypeIndex];
+  if (!filterWide.Length()) {
+    return nil;
+  }
+
+  if (filterWide.Equals(NS_LITERAL_STRING("*"))) {
+    return nil;
+  }
+
+  // The extensions in filterWide are in the format "*.ext" but are expected
+  // in the format "ext" by NSOpenPanel. So we need to filter some characters.
+  NSMutableString* filterString = [[[NSMutableString alloc] initWithString:
+                                    [NSString stringWithCharacters:reinterpret_cast<const unichar*>(filterWide.get())
+                                                            length:filterWide.Length()]] autorelease];
+  NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@". *"];
+  NSRange range = [filterString rangeOfCharacterFromSet:set];
+  while (range.length) {
+    [filterString replaceCharactersInRange:range withString:@""];
+    range = [filterString rangeOfCharacterFromSet:set];
+  }
+
+  return [[[NSArray alloc] initWithArray:
+           [filterString componentsSeparatedByString:@";"]] autorelease];
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+// Sets the dialog title to whatever it should be.  If it fails, eh,
+// the OS will provide a sensible default.
+void
+nsFilePicker::SetDialogTitle(const nsString& inTitle, id aPanel)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
+
+  [aPanel setTitle:[NSString stringWithCharacters:(const unichar*)inTitle.get() length:inTitle.Length()]];
+
+  if (!mOkButtonLabel.IsEmpty()) {
+    [aPanel setPrompt:[NSString stringWithCharacters:(const unichar*)mOkButtonLabel.get() length:mOkButtonLabel.Length()]];
+  }
+
+  NS_OBJC_END_TRY_ABORT_BLOCK;
+} 
+
+// Converts path from an nsIFile into a NSString path
+// If it fails, returns an empty string.
+NSString *
+nsFilePicker::PanelDefaultDirectory()
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  NSString *directory = nil;
+  if (mDisplayDirectory) {
+    nsAutoString pathStr;
+    mDisplayDirectory->GetPath(pathStr);
+    directory = [[[NSString alloc] initWithCharacters:reinterpret_cast<const unichar*>(pathStr.get())
+                                               length:pathStr.Length()] autorelease];
+  }
+  return directory;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+NS_IMETHODIMP nsFilePicker::GetFile(nsIFile **aFile)
+{
+  NS_ENSURE_ARG_POINTER(aFile);
+  *aFile = nullptr;
+  
+  // just return the first file
+  if (mFiles.Count() > 0) {
+    *aFile = mFiles.ObjectAt(0);
+    NS_IF_ADDREF(*aFile);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsFilePicker::GetFileURL(nsIURI **aFileURL)
+{
+  NS_ENSURE_ARG_POINTER(aFileURL);
+  *aFileURL = nullptr;
+
+  if (mFiles.Count() == 0)
+    return NS_OK;
+
+  return NS_NewFileURI(aFileURL, mFiles.ObjectAt(0));
+}
+
+NS_IMETHODIMP nsFilePicker::GetFiles(nsISimpleEnumerator **aFiles)
+{
+  return NS_NewArrayEnumerator(aFiles, mFiles);
+}
+
+NS_IMETHODIMP nsFilePicker::SetDefaultString(const nsAString& aString)
+{
+  mDefault = aString;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsFilePicker::GetDefaultString(nsAString& aString)
+{
+  return NS_ERROR_FAILURE;
+}
+
+// The default extension to use for files
+NS_IMETHODIMP nsFilePicker::GetDefaultExtension(nsAString& aExtension)
+{
+  aExtension.Truncate();
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsFilePicker::SetDefaultExtension(const nsAString& aExtension)
+{
+  return NS_OK;
+}
+
+// Append an entry to the filters array
+NS_IMETHODIMP
+nsFilePicker::AppendFilter(const nsAString& aTitle, const nsAString& aFilter)
+{
+  // "..apps" has to be translated with native executable extensions.
+  if (aFilter.EqualsLiteral("..apps")) {
+    mFilters.AppendElement(NS_LITERAL_STRING("*.app"));
+  } else {
+    mFilters.AppendElement(aFilter);
+  }
+  mTitles.AppendElement(aTitle);
+  
+  return NS_OK;
+}
+
+// Get the filter index - do we still need this?
+NS_IMETHODIMP nsFilePicker::GetFilterIndex(int32_t *aFilterIndex)
+{
+  *aFilterIndex = mSelectedTypeIndex;
+  return NS_OK;
+}
+
+// Set the filter index - do we still need this?
+NS_IMETHODIMP nsFilePicker::SetFilterIndex(int32_t aFilterIndex)
+{
+  mSelectedTypeIndex = aFilterIndex;
+  return NS_OK;
+}