/* -*- Mode: C++; tab-width: 8; 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/. */

#include "mozilla/ArrayUtils.h"

#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsLocalFile.h"
#include "nsDebug.h"
#include "nsStaticAtom.h"
#include "nsEnumeratorUtils.h"

#include "nsICategoryManager.h"
#include "nsISimpleEnumerator.h"
#include "nsIStringEnumerator.h"

#if defined(XP_WIN)
#include <windows.h>
#include <shlobj.h>
#include <stdlib.h>
#include <stdio.h>
#elif defined(XP_UNIX)
#include <unistd.h>
#include <stdlib.h>
#include <sys/param.h>
#include "prenv.h"
#ifdef MOZ_WIDGET_COCOA
#include <CoreServices/CoreServices.h>
#include <Carbon/Carbon.h>
#endif
#endif

#include "SpecialSystemDirectory.h"
#include "nsAppFileLocationProvider.h"

using namespace mozilla;

// define home directory
// For Windows platform, We are choosing Appdata folder as HOME
#if defined (XP_WIN)
#define HOME_DIR NS_WIN_APPDATA_DIR
#elif defined (MOZ_WIDGET_COCOA)
#define HOME_DIR NS_OSX_HOME_DIR
#elif defined (XP_UNIX)
#define HOME_DIR NS_UNIX_HOME_DIR
#endif

//----------------------------------------------------------------------------------------
nsresult
nsDirectoryService::GetCurrentProcessDirectory(nsIFile** aFile)
//----------------------------------------------------------------------------------------
{
  if (NS_WARN_IF(!aFile)) {
    return NS_ERROR_INVALID_ARG;
  }
  *aFile = nullptr;

  //  Set the component registry location:
  if (!gService) {
    return NS_ERROR_FAILURE;
  }

  nsresult rv;

  nsCOMPtr<nsIProperties> dirService;
  rv = nsDirectoryService::Create(nullptr,
                                  NS_GET_IID(nsIProperties),
                                  getter_AddRefs(dirService));  // needs to be around for life of product
  if (NS_FAILED(rv)) {
    return rv;
  }

  if (dirService) {
    nsCOMPtr<nsIFile> localFile;
    dirService->Get(NS_XPCOM_INIT_CURRENT_PROCESS_DIR, NS_GET_IID(nsIFile),
                    getter_AddRefs(localFile));
    if (localFile) {
      localFile.forget(aFile);
      return NS_OK;
    }
  }

  RefPtr<nsLocalFile> localFile = new nsLocalFile;

#ifdef XP_WIN
  wchar_t buf[MAX_PATH + 1];
  SetLastError(ERROR_SUCCESS);
  if (GetModuleFileNameW(0, buf, mozilla::ArrayLength(buf)) &&
      GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
    // chop off the executable name by finding the rightmost backslash
    wchar_t* lastSlash = wcsrchr(buf, L'\\');
    if (lastSlash) {
      *(lastSlash + 1) = L'\0';
    }

    localFile->InitWithPath(nsDependentString(buf));
    localFile.forget(aFile);
    return NS_OK;
  }

#elif defined(MOZ_WIDGET_COCOA)
  // Works even if we're not bundled.
  CFBundleRef appBundle = CFBundleGetMainBundle();
  if (appBundle) {
    CFURLRef bundleURL = CFBundleCopyExecutableURL(appBundle);
    if (bundleURL) {
      CFURLRef parentURL = CFURLCreateCopyDeletingLastPathComponent(
        kCFAllocatorDefault, bundleURL);
      if (parentURL) {
        // Pass true for the "resolveAgainstBase" arg to CFURLGetFileSystemRepresentation.
        // This will resolve the relative portion of the CFURL against it base, giving a full
        // path, which CFURLCopyFileSystemPath doesn't do.
        char buffer[PATH_MAX];
        if (CFURLGetFileSystemRepresentation(parentURL, true,
                                             (UInt8*)buffer, sizeof(buffer))) {
#ifdef DEBUG_conrad
          printf("nsDirectoryService - CurrentProcessDir is: %s\n", buffer);
#endif
          rv = localFile->InitWithNativePath(nsDependentCString(buffer));
          if (NS_SUCCEEDED(rv)) {
            localFile.forget(aFile);
          }
        }
        CFRelease(parentURL);
      }
      CFRelease(bundleURL);
    }
  }

  NS_ASSERTION(*aFile, "nsDirectoryService - Could not determine CurrentProcessDir.\n");
  if (*aFile) {
    return NS_OK;
  }

#elif defined(XP_UNIX)

  // In the absence of a good way to get the executable directory let
  // us try this for unix:
  //    - if MOZILLA_FIVE_HOME is defined, that is it
  //    - else give the current directory
  char buf[MAXPATHLEN];

  // The MOZ_DEFAULT_MOZILLA_FIVE_HOME variable can be set at configure time with
  // a --with-default-mozilla-five-home=foo autoconf flag.
  //
  // The idea here is to allow for builds that have a default MOZILLA_FIVE_HOME
  // regardless of the environment.  This makes it easier to write apps that
  // embed mozilla without having to worry about setting up the environment
  //
  // We do this by putenv()ing the default value into the environment.  Note that
  // we only do this if it is not already set.
#ifdef MOZ_DEFAULT_MOZILLA_FIVE_HOME
  const char* home = PR_GetEnv("MOZILLA_FIVE_HOME");
  if (!home || !*home) {
    putenv("MOZILLA_FIVE_HOME=" MOZ_DEFAULT_MOZILLA_FIVE_HOME);
  }
#endif

  char* moz5 = PR_GetEnv("MOZILLA_FIVE_HOME");
  if (moz5 && *moz5) {
    if (realpath(moz5, buf)) {
      localFile->InitWithNativePath(nsDependentCString(buf));
      localFile.forget(aFile);
      return NS_OK;
    }
  }
#if defined(DEBUG)
  static bool firstWarning = true;

  if ((!moz5 || !*moz5) && firstWarning) {
    // Warn that MOZILLA_FIVE_HOME not set, once.
    printf("Warning: MOZILLA_FIVE_HOME not set.\n");
    firstWarning = false;
  }
#endif /* DEBUG */

  // Fall back to current directory.
  if (getcwd(buf, sizeof(buf))) {
    localFile->InitWithNativePath(nsDependentCString(buf));
    localFile.forget(aFile);
    return NS_OK;
  }

#endif

  NS_ERROR("unable to get current process directory");
  return NS_ERROR_FAILURE;
} // GetCurrentProcessDirectory()

StaticRefPtr<nsDirectoryService> nsDirectoryService::gService;

nsDirectoryService::nsDirectoryService()
  : mHashtable(128)
{
}

nsresult
nsDirectoryService::Create(nsISupports* aOuter, REFNSIID aIID, void** aResult)
{
  if (NS_WARN_IF(!aResult)) {
    return NS_ERROR_INVALID_ARG;
  }
  if (NS_WARN_IF(aOuter)) {
    return NS_ERROR_NO_AGGREGATION;
  }

  if (!gService) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  return gService->QueryInterface(aIID, aResult);
}

#define DIR_ATOM(name_, value_) nsIAtom* nsDirectoryService::name_ = nullptr;
#include "nsDirectoryServiceAtomList.h"
#undef DIR_ATOM

#define DIR_ATOM(name_, value_) NS_STATIC_ATOM_BUFFER(name_##_buffer, value_)
#include "nsDirectoryServiceAtomList.h"
#undef DIR_ATOM

static const nsStaticAtom directory_atoms[] = {
#define DIR_ATOM(name_, value_) NS_STATIC_ATOM(name_##_buffer, &nsDirectoryService::name_),
#include "nsDirectoryServiceAtomList.h"
#undef DIR_ATOM
};

NS_IMETHODIMP
nsDirectoryService::Init()
{
  NS_NOTREACHED("nsDirectoryService::Init() for internal use only!");
  return NS_OK;
}

void
nsDirectoryService::RealInit()
{
  NS_ASSERTION(!gService,
               "nsDirectoryService::RealInit Mustn't initialize twice!");

  gService = new nsDirectoryService();

  NS_RegisterStaticAtoms(directory_atoms);

  // Let the list hold the only reference to the provider.
  nsAppFileLocationProvider* defaultProvider = new nsAppFileLocationProvider;
  gService->mProviders.AppendElement(defaultProvider);
}

nsDirectoryService::~nsDirectoryService()
{
}

NS_IMPL_ISUPPORTS(nsDirectoryService,
                  nsIProperties,
                  nsIDirectoryService,
                  nsIDirectoryServiceProvider,
                  nsIDirectoryServiceProvider2)


NS_IMETHODIMP
nsDirectoryService::Undefine(const char* aProp)
{
  if (NS_WARN_IF(!aProp)) {
    return NS_ERROR_INVALID_ARG;
  }

  nsDependentCString key(aProp);
  if (!mHashtable.Get(key, nullptr)) {
    return NS_ERROR_FAILURE;
  }

  mHashtable.Remove(key);
  return NS_OK;
}

NS_IMETHODIMP
nsDirectoryService::GetKeys(uint32_t* aCount, char*** aKeys)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

struct MOZ_STACK_CLASS FileData
{
  FileData(const char* aProperty, const nsIID& aUUID)
    : property(aProperty)
    , data(nullptr)
    , persistent(true)
    , uuid(aUUID)
  {
  }

  const char*   property;
  nsCOMPtr<nsISupports> data;
  bool          persistent;
  const nsIID&  uuid;
};

static bool
FindProviderFile(nsIDirectoryServiceProvider* aElement, FileData* aData)
{
  nsresult rv;
  if (aData->uuid.Equals(NS_GET_IID(nsISimpleEnumerator))) {
    // Not all providers implement this iface
    nsCOMPtr<nsIDirectoryServiceProvider2> prov2 = do_QueryInterface(aElement);
    if (prov2) {
      nsCOMPtr<nsISimpleEnumerator> newFiles;
      rv = prov2->GetFiles(aData->property, getter_AddRefs(newFiles));
      if (NS_SUCCEEDED(rv) && newFiles) {
        if (aData->data) {
          nsCOMPtr<nsISimpleEnumerator> unionFiles;

          NS_NewUnionEnumerator(getter_AddRefs(unionFiles),
                                (nsISimpleEnumerator*)aData->data.get(), newFiles);

          if (unionFiles) {
            unionFiles.swap(*(nsISimpleEnumerator**)&aData->data);
          }
        } else {
          aData->data = newFiles;
        }

        aData->persistent = false; // Enumerators can never be persistent
        return rv == NS_SUCCESS_AGGREGATE_RESULT;
      }
    }
  } else {
    rv = aElement->GetFile(aData->property, &aData->persistent,
                           (nsIFile**)&aData->data);
    if (NS_SUCCEEDED(rv) && aData->data) {
      return false;
    }
  }

  return true;
}

NS_IMETHODIMP
nsDirectoryService::Get(const char* aProp, const nsIID& aUuid, void** aResult)
{
  if (NS_WARN_IF(!aProp)) {
    return NS_ERROR_INVALID_ARG;
  }

  nsDependentCString key(aProp);

  nsCOMPtr<nsIFile> cachedFile = mHashtable.Get(key);

  if (cachedFile) {
    nsCOMPtr<nsIFile> cloneFile;
    cachedFile->Clone(getter_AddRefs(cloneFile));
    return cloneFile->QueryInterface(aUuid, aResult);
  }

  // it is not one of our defaults, lets check any providers
  FileData fileData(aProp, aUuid);

  for (int32_t i = mProviders.Length() - 1; i >= 0; i--) {
    if (!FindProviderFile(mProviders[i], &fileData)) {
      break;
    }
  }
  if (fileData.data) {
    if (fileData.persistent) {
      Set(aProp, static_cast<nsIFile*>(fileData.data.get()));
    }
    nsresult rv = (fileData.data)->QueryInterface(aUuid, aResult);
    fileData.data = nullptr; // AddRef occurs in FindProviderFile()
    return rv;
  }

  FindProviderFile(static_cast<nsIDirectoryServiceProvider*>(this), &fileData);
  if (fileData.data) {
    if (fileData.persistent) {
      Set(aProp, static_cast<nsIFile*>(fileData.data.get()));
    }
    nsresult rv = (fileData.data)->QueryInterface(aUuid, aResult);
    fileData.data = nullptr; // AddRef occurs in FindProviderFile()
    return rv;
  }

  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
nsDirectoryService::Set(const char* aProp, nsISupports* aValue)
{
  if (NS_WARN_IF(!aProp)) {
    return NS_ERROR_INVALID_ARG;
  }

  nsDependentCString key(aProp);
  if (mHashtable.Get(key, nullptr) || !aValue) {
    return NS_ERROR_FAILURE;
  }

  nsCOMPtr<nsIFile> ourFile = do_QueryInterface(aValue);
  if (ourFile) {
    nsCOMPtr<nsIFile> cloneFile;
    ourFile->Clone(getter_AddRefs(cloneFile));
    mHashtable.Put(key, cloneFile);

    return NS_OK;
  }

  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
nsDirectoryService::Has(const char* aProp, bool* aResult)
{
  if (NS_WARN_IF(!aProp)) {
    return NS_ERROR_INVALID_ARG;
  }

  *aResult = false;
  nsCOMPtr<nsIFile> value;
  nsresult rv = Get(aProp, NS_GET_IID(nsIFile), getter_AddRefs(value));
  if (NS_FAILED(rv)) {
    return NS_OK;
  }

  if (value) {
    *aResult = true;
  }

  return rv;
}

NS_IMETHODIMP
nsDirectoryService::RegisterProvider(nsIDirectoryServiceProvider* aProv)
{
  if (!aProv) {
    return NS_ERROR_FAILURE;
  }

  mProviders.AppendElement(aProv);
  return NS_OK;
}

void
nsDirectoryService::RegisterCategoryProviders()
{
  nsCOMPtr<nsICategoryManager> catman
  (do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
  if (!catman) {
    return;
  }

  nsCOMPtr<nsISimpleEnumerator> entries;
  catman->EnumerateCategory(XPCOM_DIRECTORY_PROVIDER_CATEGORY,
                            getter_AddRefs(entries));

  nsCOMPtr<nsIUTF8StringEnumerator> strings(do_QueryInterface(entries));
  if (!strings) {
    return;
  }

  bool more;
  while (NS_SUCCEEDED(strings->HasMore(&more)) && more) {
    nsAutoCString entry;
    strings->GetNext(entry);

    nsXPIDLCString contractID;
    catman->GetCategoryEntry(XPCOM_DIRECTORY_PROVIDER_CATEGORY, entry.get(),
                             getter_Copies(contractID));

    if (contractID) {
      nsCOMPtr<nsIDirectoryServiceProvider> provider = do_GetService(contractID.get());
      if (provider) {
        RegisterProvider(provider);
      }
    }
  }
}

NS_IMETHODIMP
nsDirectoryService::UnregisterProvider(nsIDirectoryServiceProvider* aProv)
{
  if (!aProv) {
    return NS_ERROR_FAILURE;
  }

  mProviders.RemoveElement(aProv);
  return NS_OK;
}

// DO NOT ADD ANY LOCATIONS TO THIS FUNCTION UNTIL YOU TALK TO: dougt@netscape.com.
// This is meant to be a place of xpcom or system specific file locations, not
// application specific locations.  If you need the later, register a callback for
// your application.

NS_IMETHODIMP
nsDirectoryService::GetFile(const char* aProp, bool* aPersistent,
                            nsIFile** aResult)
{
  nsCOMPtr<nsIFile> localFile;
  nsresult rv = NS_ERROR_FAILURE;

  *aResult = nullptr;
  *aPersistent = true;

  nsCOMPtr<nsIAtom> inAtom = NS_Atomize(aProp);

  // check to see if it is one of our defaults

  if (inAtom == nsDirectoryService::sCurrentProcess ||
      inAtom == nsDirectoryService::sOS_CurrentProcessDirectory) {
    rv = GetCurrentProcessDirectory(getter_AddRefs(localFile));
  }

  // Unless otherwise set, the core pieces of the GRE exist
  // in the current process directory.
  else if (inAtom == nsDirectoryService::sGRE_Directory ||
           inAtom == nsDirectoryService::sGRE_BinDirectory) {
    rv = GetCurrentProcessDirectory(getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_DriveDirectory) {
    rv = GetSpecialSystemDirectory(OS_DriveDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_TemporaryDirectory) {
    rv = GetSpecialSystemDirectory(OS_TemporaryDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_CurrentProcessDirectory) {
    rv = GetSpecialSystemDirectory(OS_CurrentProcessDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_CurrentWorkingDirectory) {
    rv = GetSpecialSystemDirectory(OS_CurrentWorkingDirectory, getter_AddRefs(localFile));
  }

#if defined(MOZ_WIDGET_COCOA)
  else if (inAtom == nsDirectoryService::sDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kSystemFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sTrashDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kTrashFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sStartupDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kStartupFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sShutdownDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kShutdownFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sAppleMenuDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kAppleMenuFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sControlPanelDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kControlPanelFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sExtensionDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kExtensionFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sFontsDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kFontsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPreferencesDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kPreferencesFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDocumentsDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kDocumentsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sInternetSearchDirectory) {
    rv = GetOSXFolderType(kClassicDomain, kInternetSearchSitesFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sUserLibDirectory) {
    rv = GetOSXFolderType(kUserDomain, kDomainLibraryFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_HomeDirectory) {
    rv = GetOSXFolderType(kUserDomain, kDomainTopLevelFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDefaultDownloadDirectory) {
    // 10.5 and later, we can use kDownloadsFolderType which is defined in
    // Folders.h as "down".  However, in order to support 10.4 still, we
    // cannot use the named constant.  We'll use it's value, and if it
    // fails, fall back to the desktop.
#ifndef kDownloadsFolderType
#define kDownloadsFolderType 'down'
#endif

    rv = GetOSXFolderType(kUserDomain, kDownloadsFolderType,
                          getter_AddRefs(localFile));
    if (NS_FAILED(rv)) {
      rv = GetOSXFolderType(kUserDomain, kDesktopFolderType,
                            getter_AddRefs(localFile));
    }
  } else if (inAtom == nsDirectoryService::sUserDesktopDirectory ||
             inAtom == nsDirectoryService::sOS_DesktopDirectory) {
    rv = GetOSXFolderType(kUserDomain, kDesktopFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalDesktopDirectory) {
    rv = GetOSXFolderType(kLocalDomain, kDesktopFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sUserApplicationsDirectory) {
    rv = GetOSXFolderType(kUserDomain, kApplicationsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalApplicationsDirectory) {
    rv = GetOSXFolderType(kLocalDomain, kApplicationsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sUserDocumentsDirectory) {
    rv = GetOSXFolderType(kUserDomain, kDocumentsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalDocumentsDirectory) {
    rv = GetOSXFolderType(kLocalDomain, kDocumentsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sUserInternetPlugInDirectory) {
    rv = GetOSXFolderType(kUserDomain, kInternetPlugInFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalInternetPlugInDirectory) {
    rv = GetOSXFolderType(kLocalDomain, kInternetPlugInFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sUserFrameworksDirectory) {
    rv = GetOSXFolderType(kUserDomain, kFrameworksFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalFrameworksDirectory) {
    rv = GetOSXFolderType(kLocalDomain, kFrameworksFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sUserPreferencesDirectory) {
    rv = GetOSXFolderType(kUserDomain, kPreferencesFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalPreferencesDirectory) {
    rv = GetOSXFolderType(kLocalDomain, kPreferencesFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPictureDocumentsDirectory) {
    rv = GetOSXFolderType(kUserDomain, kPictureDocumentsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sMovieDocumentsDirectory) {
    rv = GetOSXFolderType(kUserDomain, kMovieDocumentsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sMusicDocumentsDirectory) {
    rv = GetOSXFolderType(kUserDomain, kMusicDocumentsFolderType, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sInternetSitesDirectory) {
    rv = GetOSXFolderType(kUserDomain, kInternetSitesFolderType, getter_AddRefs(localFile));
  }
#elif defined (XP_WIN)
  else if (inAtom == nsDirectoryService::sSystemDirectory) {
    rv = GetSpecialSystemDirectory(Win_SystemDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sWindowsDirectory) {
    rv = GetSpecialSystemDirectory(Win_WindowsDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sWindowsProgramFiles) {
    rv = GetSpecialSystemDirectory(Win_ProgramFiles, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_HomeDirectory) {
    rv = GetSpecialSystemDirectory(Win_HomeDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDesktop) {
    rv = GetSpecialSystemDirectory(Win_Desktop, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPrograms) {
    rv = GetSpecialSystemDirectory(Win_Programs, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sControls) {
    rv = GetSpecialSystemDirectory(Win_Controls, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPrinters) {
    rv = GetSpecialSystemDirectory(Win_Printers, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPersonal) {
    rv = GetSpecialSystemDirectory(Win_Personal, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sFavorites) {
    rv = GetSpecialSystemDirectory(Win_Favorites, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sStartup) {
    rv = GetSpecialSystemDirectory(Win_Startup, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sRecent) {
    rv = GetSpecialSystemDirectory(Win_Recent, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sSendto) {
    rv = GetSpecialSystemDirectory(Win_Sendto, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sBitbucket) {
    rv = GetSpecialSystemDirectory(Win_Bitbucket, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sStartmenu) {
    rv = GetSpecialSystemDirectory(Win_Startmenu, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDesktopdirectory ||
             inAtom == nsDirectoryService::sOS_DesktopDirectory) {
    rv = GetSpecialSystemDirectory(Win_Desktopdirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDrives) {
    rv = GetSpecialSystemDirectory(Win_Drives, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sNetwork) {
    rv = GetSpecialSystemDirectory(Win_Network, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sNethood) {
    rv = GetSpecialSystemDirectory(Win_Nethood, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sFonts) {
    rv = GetSpecialSystemDirectory(Win_Fonts, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sTemplates) {
    rv = GetSpecialSystemDirectory(Win_Templates, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sCommon_Startmenu) {
    rv = GetSpecialSystemDirectory(Win_Common_Startmenu, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sCommon_Programs) {
    rv = GetSpecialSystemDirectory(Win_Common_Programs, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sCommon_Startup) {
    rv = GetSpecialSystemDirectory(Win_Common_Startup, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sCommon_Desktopdirectory) {
    rv = GetSpecialSystemDirectory(Win_Common_Desktopdirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sCommon_AppData) {
    rv = GetSpecialSystemDirectory(Win_Common_AppData, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sAppdata) {
    rv = GetSpecialSystemDirectory(Win_Appdata, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLocalAppdata) {
    rv = GetSpecialSystemDirectory(Win_LocalAppdata, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPrinthood) {
    rv = GetSpecialSystemDirectory(Win_Printhood, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sWinCookiesDirectory) {
    rv = GetSpecialSystemDirectory(Win_Cookies, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDefaultDownloadDirectory) {
    rv = GetSpecialSystemDirectory(Win_Downloads, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sDocs) {
    rv = GetSpecialSystemDirectory(Win_Documents, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sPictures) {
    rv = GetSpecialSystemDirectory(Win_Pictures, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sMusic) {
    rv = GetSpecialSystemDirectory(Win_Music, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sVideos) {
    rv = GetSpecialSystemDirectory(Win_Videos, getter_AddRefs(localFile));
  }
#elif defined (XP_UNIX)

  else if (inAtom == nsDirectoryService::sLocalDirectory) {
    rv = GetSpecialSystemDirectory(Unix_LocalDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sLibDirectory) {
    rv = GetSpecialSystemDirectory(Unix_LibDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sOS_HomeDirectory) {
    rv = GetSpecialSystemDirectory(Unix_HomeDirectory, getter_AddRefs(localFile));
  } else if (inAtom == nsDirectoryService::sXDGDesktop ||
             inAtom == nsDirectoryService::sOS_DesktopDirectory) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Desktop, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGDocuments) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Documents, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGDownload ||
             inAtom == nsDirectoryService::sDefaultDownloadDirectory) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Download, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGMusic) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Music, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGPictures) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Pictures, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGPublicShare) {
    rv = GetSpecialSystemDirectory(Unix_XDG_PublicShare, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGTemplates) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Templates, getter_AddRefs(localFile));
    *aPersistent = false;
  } else if (inAtom == nsDirectoryService::sXDGVideos) {
    rv = GetSpecialSystemDirectory(Unix_XDG_Videos, getter_AddRefs(localFile));
    *aPersistent = false;
  }
#endif

  if (NS_FAILED(rv)) {
    return rv;
  }

  if (!localFile) {
    return NS_ERROR_FAILURE;
  }

  localFile.forget(aResult);
  return NS_OK;
}

NS_IMETHODIMP
nsDirectoryService::GetFiles(const char* aProp, nsISimpleEnumerator** aResult)
{
  if (NS_WARN_IF(!aResult)) {
    return NS_ERROR_INVALID_ARG;
  }
  *aResult = nullptr;

  return NS_ERROR_FAILURE;
}