gecko/xpcom/glue/standalone/nsGREDirServiceProvider.cpp

321 lines
9.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Sean Su <ssu@netscape.com>
* Benjamin Smedberg <benjamin@smedbergs.us>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsBuildID.h"
#include "nsEmbedString.h"
#include "nsXPCOMPrivate.h"
#include "nsXPCOMGlue.h"
#include "nsILocalFile.h"
#include "nsIDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCOMPtr.h"
#include "nsMemory.h"
#include "nspr.h"
#include "plstr.h"
#ifdef XP_WIN32
#include <windows.h>
#include <stdlib.h>
#include <mbstring.h>
#elif defined(XP_OS2)
#define INCL_DOS
#include <os2.h>
#include <stdlib.h>
#include <stdio.h>
#include "prenv.h"
#elif defined(XP_MACOSX)
#include <Processes.h>
#include <CFBundle.h>
#elif defined(XP_UNIX)
#include <unistd.h>
#include <stdlib.h>
#include <sys/param.h>
#include "prenv.h"
#elif defined(XP_BEOS)
#include <stdlib.h>
#include <image.h>
#endif
#include <sys/stat.h>
#include "nsGREDirServiceProvider.h"
static PRBool GRE_GetCurrentProcessDirectory(char* buffer);
//*****************************************************************************
// nsGREDirServiceProvider::nsISupports
//*****************************************************************************
NS_IMPL_ISUPPORTS1(nsGREDirServiceProvider, nsIDirectoryServiceProvider)
//*****************************************************************************
// nsGREDirServiceProvider::nsIDirectoryServiceProvider
//*****************************************************************************
NS_IMETHODIMP
nsGREDirServiceProvider::GetFile(const char *prop, PRBool *persistent, nsIFile **_retval)
{
*_retval = nsnull;
*persistent = PR_TRUE;
//---------------------------------------------------------------
// Note that by returning a valid localFile's for NS_GRE_DIR,
// your app is indicating to XPCOM that it found a GRE version
// with which it's compatible with and intends to be "run against"
// that GRE.
//
// Please see http://www.mozilla.org/projects/embedding/GRE.html
// for more info on GRE.
//---------------------------------------------------------------
if(strcmp(prop, NS_GRE_DIR) == 0)
{
nsILocalFile* lfile = nsnull;
nsresult rv = GRE_GetGREDirectory(&lfile);
*_retval = lfile;
return rv;
}
return NS_ERROR_FAILURE;
}
//*****************************************************************************
// Implementations from nsXPCOMGlue.h and helper functions.
//*****************************************************************************
PRBool
GRE_GetCurrentProcessDirectory(char* buffer)
{
*buffer = '\0';
#ifdef XP_WIN
DWORD bufLength = ::GetModuleFileName(0, buffer, MAXPATHLEN);
if (bufLength == 0 || bufLength == MAXPATHLEN)
return PR_FALSE;
// chop of the executable name by finding the rightmost backslash
unsigned char* lastSlash = _mbsrchr((unsigned char*) buffer, '\\');
if (lastSlash) {
*(lastSlash) = '\0';
return PR_TRUE;
}
#elif defined(XP_MACOSX)
// Works even if we're not bundled.
CFBundleRef appBundle = CFBundleGetMainBundle();
if (appBundle != nsnull)
{
CFURLRef bundleURL = CFBundleCopyExecutableURL(appBundle);
if (bundleURL != nsnull)
{
CFURLRef parentURL = CFURLCreateCopyDeletingLastPathComponent(kCFAllocatorDefault, bundleURL);
if (parentURL)
{
CFStringRef path = CFURLCopyFileSystemPath(parentURL, kCFURLPOSIXPathStyle);
if (path)
{
CFStringGetCString(path, buffer, MAXPATHLEN, kCFStringEncodingUTF8);
CFRelease(path);
}
CFRelease(parentURL);
}
CFRelease(bundleURL);
}
}
if (*buffer) return PR_TRUE;
#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
// 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 py 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
if (getenv("MOZILLA_FIVE_HOME") == nsnull)
{
putenv("MOZILLA_FIVE_HOME=" MOZ_DEFAULT_MOZILLA_FIVE_HOME);
}
#endif
char *moz5 = getenv("MOZILLA_FIVE_HOME");
if (moz5 && *moz5)
{
if (!realpath(moz5, buffer))
strcpy(buffer, moz5);
return PR_TRUE;
}
else
{
#if defined(DEBUG)
static PRBool firstWarning = PR_TRUE;
if(firstWarning) {
// Warn that MOZILLA_FIVE_HOME not set, once.
printf("Warning: MOZILLA_FIVE_HOME not set.\n");
firstWarning = PR_FALSE;
}
#endif /* DEBUG */
// Fall back to current directory.
if (getcwd(buffer, MAXPATHLEN))
{
return PR_TRUE;
}
}
#elif defined(XP_OS2)
PPIB ppib;
PTIB ptib;
char* p;
DosGetInfoBlocks( &ptib, &ppib);
DosQueryModuleName( ppib->pib_hmte, MAXPATHLEN, buffer);
p = strrchr( buffer, '\\'); // XXX DBCS misery
if (p) {
*p = '\0';
return PR_TRUE;
}
#elif defined(XP_BEOS)
// We are able to get actual path for running app.
int32 cookie = 0;
image_info info;
char *lastSlash;
*buffer = 0;
if (get_next_image_info(0, &cookie, &info) == B_OK)
{
strcpy(buffer, info.name);
if ((lastSlash = strrchr(buffer, '/')) != 0)
{
*lastSlash = '\0';
return PR_TRUE;
}
}
#endif
return PR_FALSE;
}
/**
* the GRE location is stored in a static buffer so that we don't have
* to compute it multiple times.
*/
static char sXPCOMPath[MAXPATHLEN] = "";
extern "C" char const *
GRE_GetXPCOMPath()
{
// we've already done this...
if (*sXPCOMPath)
return sXPCOMPath;
char buffer[MAXPATHLEN];
// If the xpcom library exists in the current process directory,
// then we will not use any GRE. The assumption here is that the
// GRE is in the same directory as the executable.
if (GRE_GetCurrentProcessDirectory(buffer)) {
PRUint32 pathlen = strlen(buffer);
strcpy(buffer + pathlen, XPCOM_FILE_PATH_SEPARATOR XPCOM_DLL);
struct stat libStat;
int statResult = stat(buffer, &libStat);
if (statResult != -1) {
//found our xpcom lib in the current process directory
strcpy(sXPCOMPath, buffer);
return sXPCOMPath;
}
}
static const GREVersionRange version = {
GRE_BUILD_ID, PR_TRUE,
GRE_BUILD_ID, PR_TRUE
};
GRE_GetGREPathWithProperties(&version, 1,
nsnull, 0,
sXPCOMPath, MAXPATHLEN);
if (*sXPCOMPath)
return sXPCOMPath;
return nsnull;
}
extern "C" nsresult
GRE_GetGREDirectory(nsILocalFile* *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
nsresult rv = NS_ERROR_FAILURE;
// Get the path of the GRE which is compatible with our embedding application
// from the registry
const char *pGREDir = GRE_GetXPCOMPath();
if(!pGREDir)
return NS_ERROR_FAILURE;
nsCOMPtr<nsILocalFile> xpcomPath;
nsEmbedCString leaf(pGREDir);
rv = NS_NewNativeLocalFile(leaf, PR_TRUE, getter_AddRefs(xpcomPath));
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIFile> directory;
rv = xpcomPath->GetParent(getter_AddRefs(directory));
if (NS_FAILED(rv))
return rv;
return CallQueryInterface(directory, _retval);
}