Fix for #130877 - Chnages to create app specific component registries

r=dougt, sr=shaver, a=drivers

xpcom/components/nsComponentManager.cpp

@@ -3069,18 +3069,6 @@ nsComponentManagerImpl::AutoRegisterImpl(PRInt32 when,
     {
         // Use supplied components' directory   
         dir = inDirSpec;
-        
-        if (fileIsCompDir) {
-            // Set components' directory for AutoRegisterInterfces to query
-            nsCOMPtr<nsIProperties> directoryService = 
-                do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv);
-            if (NS_FAILED(rv)) return rv;
-            
-            // Don't care if undefining fails
-            directoryService->Undefine(NS_XPCOM_COMPONENT_DIR); 
-            rv = directoryService->Define(NS_XPCOM_COMPONENT_DIR, dir);
-            if (NS_FAILED(rv)) return rv;
-        }
     } 
     else 
     {

xpcom/io/nsDirectoryService.cpp

@@ -338,6 +338,8 @@ nsDirectoryService::GetCurrentProcessDirectory(nsILocalFile** aFile)
 nsIAtom*  nsDirectoryService::sCurrentProcess = nsnull;
 nsIAtom*  nsDirectoryService::sComponentRegistry = nsnull;
 nsIAtom*  nsDirectoryService::sComponentDirectory = nsnull;
+nsIAtom*  nsDirectoryService::sMRE_Directory = nsnull;
+nsIAtom*  nsDirectoryService::sMRE_ComponentDirectory = nsnull;
 nsIAtom*  nsDirectoryService::sOS_DriveDirectory = nsnull;
 nsIAtom*  nsDirectoryService::sOS_TemporaryDirectory = nsnull;
 nsIAtom*  nsDirectoryService::sOS_CurrentProcessDirectory = nsnull;
@@ -437,7 +439,9 @@ nsDirectoryService::Init()
     nsDirectoryService::sCurrentProcess             = NS_NewAtom(NS_XPCOM_CURRENT_PROCESS_DIR);
     nsDirectoryService::sComponentRegistry          = NS_NewAtom(NS_XPCOM_COMPONENT_REGISTRY_FILE);
     nsDirectoryService::sComponentDirectory         = NS_NewAtom(NS_XPCOM_COMPONENT_DIR);
-    
+    nsDirectoryService::sMRE_Directory              = NS_NewAtom(NS_MRE_DIR);
+    nsDirectoryService::sMRE_ComponentDirectory     = NS_NewAtom(NS_MRE_COMPONENT_DIR);
+
     nsDirectoryService::sOS_DriveDirectory          = NS_NewAtom(NS_OS_DRIVE_DIR);
     nsDirectoryService::sOS_TemporaryDirectory      = NS_NewAtom(NS_OS_TEMP_DIR);
     nsDirectoryService::sOS_CurrentProcessDirectory = NS_NewAtom(NS_OS_CURRENT_PROCESS_DIR);
@@ -527,6 +531,8 @@ nsDirectoryService::~nsDirectoryService()
      NS_IF_RELEASE(nsDirectoryService::sCurrentProcess);
      NS_IF_RELEASE(nsDirectoryService::sComponentRegistry);
      NS_IF_RELEASE(nsDirectoryService::sComponentDirectory);
+     NS_IF_RELEASE(nsDirectoryService::sMRE_Directory);
+     NS_IF_RELEASE(nsDirectoryService::sMRE_ComponentDirectory);
      NS_IF_RELEASE(nsDirectoryService::sOS_DriveDirectory);
      NS_IF_RELEASE(nsDirectoryService::sOS_TemporaryDirectory);
      NS_IF_RELEASE(nsDirectoryService::sOS_CurrentProcessDirectory);
@@ -807,6 +813,16 @@ nsDirectoryService::GetFile(const char *prop, PRBool *persistent, nsIFile **_ret
         if (localFile)
     		localFile->AppendNative(COMPONENT_REGISTRY_NAME);           
     }
+    else if (inAtom == nsDirectoryService::sMRE_Directory)
+    {
+        rv = GetCurrentProcessDirectory(getter_AddRefs(localFile));
+    }
+    else if (inAtom == nsDirectoryService::sMRE_ComponentDirectory)
+    {
+        rv = GetCurrentProcessDirectory(getter_AddRefs(localFile));
+        if (localFile)
+             localFile->AppendNative(COMPONENT_DIRECTORY);
+     }
     else if (inAtom == nsDirectoryService::sComponentDirectory)
     {
         rv = GetCurrentProcessDirectory(getter_AddRefs(localFile));

xpcom/io/nsDirectoryService.h

@@ -82,6 +82,8 @@ private:
     static nsIAtom *sCurrentProcess;
     static nsIAtom *sComponentRegistry;
     static nsIAtom *sComponentDirectory;
+    static nsIAtom *sMRE_Directory;
+    static nsIAtom *sMRE_ComponentDirectory;
     static nsIAtom *sOS_DriveDirectory;
     static nsIAtom *sOS_TemporaryDirectory;
     static nsIAtom *sOS_CurrentProcessDirectory;

xpcom/io/nsDirectoryServiceDefs.h

@@ -59,6 +59,9 @@
 #define NS_XPCOM_COMPONENT_REGISTRY_FILE        "ComRegF"
 #define NS_XPCOM_COMPONENT_DIR                  "ComsD"
 
+#define NS_MRE_DIR                              "MreD"
+#define NS_MRE_COMPONENT_DIR                    "MreComsD" 
+
 #define NS_OS_HOME_DIR                          "Home"
 #define NS_OS_DRIVE_DIR                         "DrvD"
 #define NS_OS_TEMP_DIR                          "TmpD"

xpcom/reflect/xptinfo/src/xptiInterfaceInfoManager.cpp

@@ -250,6 +250,22 @@ PRBool xptiInterfaceInfoManager::BuildFileSearchPath(nsISupportsArray** aPath)
 
     // Add additional plugins dirs
     // No error checking here since this is optional in some embeddings
+    
+    // Add the MRE's component directory to searchPath if the 
+    // application is using an MRE.
+    // An application indicates that it's using an MRE by returning
+    // a valid nsIFile via it's directory service provider interface.
+    //
+    // Please see http://www.mozilla.org/projects/embedding/MRE.html
+    // for more info. on MREs
+    //
+    nsCOMPtr<nsILocalFile> mreComponentDirectory;
+    nsresult rv = GetDirectoryFromDirService(NS_MRE_COMPONENT_DIR, 
+                                    getter_AddRefs(mreComponentDirectory));
+    if (NS_SUCCEEDED(rv))
+    {
+        searchPath->AppendElement(mreComponentDirectory);
+    }
 
     (void) AppendFromDirServiceList(NS_APP_PLUGINS_DIR_LIST, searchPath);