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lightning-sunbird  0.9+nobinonly
nsDeleteDir.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* vim:set ts=2 sw=2 sts=2 et cindent: */
00003 /* ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is mozilla.org code.
00017  *
00018  * The Initial Developer of the Original Code is Google Inc.
00019  * Portions created by the Initial Developer are Copyright (C) 2005
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *  Darin Fisher <darin@meer.net>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsDeleteDir.h"
00040 #include "nsIFile.h"
00041 #include "nsString.h"
00042 #include "prthread.h"
00043 
00044 PR_STATIC_CALLBACK(void) DeleteDirThreadFunc(void *arg)
00045 {
00046   nsIFile *dir = NS_STATIC_CAST(nsIFile *, arg);
00047   dir->Remove(PR_TRUE);
00048   NS_RELEASE(dir);
00049 }
00050 
00051 nsresult DeleteDir(nsIFile *dirIn, PRBool moveToTrash, PRBool sync)
00052 {
00053   nsresult rv;
00054   nsCOMPtr<nsIFile> trash, dir;
00055 
00056   // Need to make a clone of this since we don't want to modify the input
00057   // file object.
00058   rv = dirIn->Clone(getter_AddRefs(dir));
00059   if (NS_FAILED(rv))
00060     return rv;
00061 
00062   if (moveToTrash)
00063   {
00064     rv = GetTrashDir(dir, &trash);
00065     if (NS_FAILED(rv))
00066       return rv;
00067 
00068     nsCOMPtr<nsIFile> subDir;
00069     rv = trash->Clone(getter_AddRefs(subDir));
00070     if (NS_FAILED(rv))
00071       return rv;
00072 
00073     rv = subDir->AppendNative(NS_LITERAL_CSTRING("Trash"));
00074     if (NS_FAILED(rv))
00075       return rv;
00076 
00077     rv = subDir->CreateUnique(nsIFile::DIRECTORY_TYPE, 0700);
00078     if (NS_FAILED(rv))
00079       return rv;
00080 
00081     rv = dir->MoveToNative(subDir, EmptyCString());
00082     if (NS_FAILED(rv))
00083       return rv;
00084   }
00085   else
00086   {
00087     // we want to pass a clone of the original off to the worker thread.
00088     trash.swap(dir);
00089   }
00090 
00091   // Steal ownership of trash directory; let the thread release it.
00092   nsIFile *trashRef = nsnull;
00093   trash.swap(trashRef);
00094 
00095   if (sync)
00096   {
00097     DeleteDirThreadFunc(trashRef);
00098   }
00099   else
00100   {
00101     // now, invoke the worker thread
00102     PRThread *thread = PR_CreateThread(PR_USER_THREAD,
00103                                        DeleteDirThreadFunc,
00104                                        trashRef,
00105                                        PR_PRIORITY_LOW,
00106                                        PR_GLOBAL_THREAD,
00107                                        PR_UNJOINABLE_THREAD,
00108                                        0);
00109     if (!thread)
00110       return NS_ERROR_UNEXPECTED;
00111   }
00112 
00113   return NS_OK;
00114 }
00115 
00116 nsresult GetTrashDir(nsIFile *target, nsCOMPtr<nsIFile> *result)
00117 {
00118   nsresult rv = target->Clone(getter_AddRefs(*result));
00119   if (NS_FAILED(rv))
00120     return rv;
00121 
00122   nsCAutoString leaf;
00123   rv = (*result)->GetNativeLeafName(leaf);
00124   if (NS_FAILED(rv))
00125     return rv;
00126   leaf.AppendLiteral(".Trash");
00127 
00128   return (*result)->SetNativeLeafName(leaf);
00129 }