Added nsIPref::GetPrefType.

modules/libpref/public/nsIPref.idl

@@ -42,6 +42,22 @@ interface nsIFileSpec;
 
 [scriptable, uuid(a22ad7b0-ca86-11d1-a9a4-00805f8a7ac4)]
 interface nsIPref : nsISupports {
+%{C++
+  /* Pref types - see GetPrefType() */
+  enum { 
+      ePrefInvalid = 0,
+      ePrefLocked = 1, 
+      ePrefUserset = 2, 
+      ePrefConfig = 4, 
+      ePreRemote = 8,
+      ePrefLilocal = 16, 
+      ePrefString = 32, 
+      ePrefInt = 64, 
+      ePrefBool = 128,
+      ePrefValuetypeMask = (ePrefString | ePrefInt | ePrefBool)
+  };
+%}
+
   // Initialize/shutdown
   void StartUp();
   void ReadUserPrefs();
@@ -70,6 +86,7 @@ interface nsIPref : nsISupports {
   [noscript] readonly attribute JSObject prefConfigObject;
 
   /* Getters */
+  long GetPrefType(in string pref);
   long GetIntPref(in string pref);
   boolean GetBoolPref(in string pref);
   [noscript] void GetBinaryPref(in string pref, in voidStar buf, inout long buf_length);

modules/libpref/src/nsPref.cpp

@@ -501,6 +501,16 @@ NS_IMETHODIMP nsPref::GetPrefConfigObject(JSObject **js_object)
 /*
  * Getters
  */
+NS_IMETHODIMP nsPref::GetPrefType(const char *pref, PRInt32 * return_type)
+{
+  // XXX The current implementation returns the raw type - the
+  // enums defining the types have been duplicated. If the old
+  // types don't all make sense in the context of the new API,
+  // we might need to do some translation.
+
+  *return_type = PREF_GetPrefType(pref);
+  return NS_OK;
+}
 
 NS_IMETHODIMP nsPref::GetIntPref(const char *pref, PRInt32 * return_int)
 {