/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsILocalFile;
interface nsIObserver;
interface nsIFileSpec;

#include "nsIPrefService.idl"
#include "nsIPrefBranch.idl"

/*
 * This entire interface is deprecated and should not be used.
 * See nsIPrefService and nsIPrefBranch for the new implementations.
 */

%{C++


#ifndef have_PrefChangedFunc_typedef
typedef int (*PR_CALLBACK PrefChangedFunc)(const char *, void *);
#define have_PrefChangedFunc_typedef
#endif
typedef void (*PrefEnumerationFunc)(const char *, void *);

#define NS_PREF_CID                                    \
  { /* {dc26e0e0-ca94-11d1-a9a4-00805f8a7ac4} */       \
    0xdc26e0e0,                                        \
    0xca94,                                            \
    0x11d1,                                            \
    { 0xa9, 0xa4, 0x00, 0x80, 0x5f, 0x8a, 0x7a, 0xc4 } \
  }

#define NS_PREF_CONTRACTID \
  "@mozilla.org/preferences;1" 

#define NS_PREF_CLASSNAME "Preferences Service"
 
#define NS_PREF_VALUE_CHANGED 1 
%}
native PrefChangedFunc(PrefChangedFunc);
native PrefEnumerationFunc(PrefEnumerationFunc);


[scriptable, uuid(a22ad7b0-ca86-11d1-a9a4-00805f8a7ac4)]
interface nsIPref : nsISupports {

  /*
   * These are the the Prefs Service methods we will support for now
   */

  /*
   * readUserPrefs
   * 
   * read a user preference file, pass in null for default file
   */
  void readUserPrefs(in nsIFile aFile);

  /*
   * resetPrefs
   * 
   * completely flush and reload the preferences system
   */
  void ResetPrefs();

  /*
   * resetUserPrefs
   * 
   * flush all current user prefrences (reset all preferences to the default values)
   */
  void ResetUserPrefs();

  /*
   * savePrefFile
   * 
   * write current preferences state to a file, pass in null for default file
   */
  void savePrefFile(in nsIFile aFile);

  /*
   * branch operations
   */

  nsIPrefBranch getBranch(in string aPrefRoot);
  nsIPrefBranch getDefaultBranch(in string aPrefRoot);


  /*
   * These are the the Prefs Branch methods we will support for now
   */

  const long ePrefInvalid = 0;
  const long ePrefLocked = 1;
  const long ePrefUserset = 2;
  const long ePrefConfig = 4;
  const long ePrefRemote = 8;
  const long ePrefLilocal = 16;
  const long ePrefString = 32;
  const long ePrefInt = 64;
  const long ePrefBool = 128;
  const long ePrefValuetypeMask = (ePrefString | ePrefInt | ePrefBool);

  /*
   * the root of this branch, such as "browser."
   */
  readonly attribute string root;

  /*
   * standard methods for accessing preferences
   */
  long    GetPrefType(in string aPrefName);

  boolean GetBoolPref(in string aPrefName);
  void    SetBoolPref(in string aPrefName, in long aValue);

  string  GetCharPref(in string aPrefName);
  void    SetCharPref(in string aPrefName, in string aValue);

  long    GetIntPref(in string aPrefName);
  void    SetIntPref(in string aPrefName, in long aValue);

  /*
   * methods for accessing complex preferences (i.e. items beyond the simple bool, char, and int)
   */
  void getComplexValue(in string aPrefName, in nsIIDRef aType, [iid_is(aType), retval] out nsQIResult aValue);
  void setComplexValue(in string aPrefName, in nsIIDRef aType, in nsISupports aValue);

  /*
   * methods for preference state manipulation
   */
  void    ClearUserPref(in string aPrefName);
  boolean PrefIsLocked(in string aPrefName);
  void    lockPref(in string aPrefName);
  void    unlockPref(in string aPrefName);


  /*
   * branch-level operations
   */

  /*
   * resetBranch
   * 
   * clears all user preferences starting at the given preference prefix
   * pass in null or "" to clear this branch
   */
  void resetBranch(in string aStartingAt);

  /*
   * deleteBranch
   * 
   * removes all preferences starting at the given preference prefix
   * pass in null or "" to remove this branch
   */
  void DeleteBranch(in string aStartingAt);

  /*
   * getChildList
   *
   * Returns an array of strings representing the child preferences of the branch root
   * 
   * @param startingAt pass in null or "" to enumerate the entire branch
   * @param count Receives the number of elements in the array.
   * @param childArray Receives the array of child preferences.
   */
  void getChildList(in string aStartingAt,
                    out unsigned long aCount,
                    [array, size_is(aCount), retval] out string aChildArray);


  /*
   * Listeners
   */

  /*
   * The observers have their |Observe| methods called with
   * ([the observer], "nsPref:changed", [pref name]).
   */
  void addObserver(in string aDomain, in nsIObserver aObserver, in boolean aHoldWeak);
  void removeObserver(in string aDomain, in nsIObserver aObserver);


  /*
   * Finally some deprecated methods
   */

  
  // these are changing from Copy->get
  string CopyCharPref(in string pref);
  string CopyDefaultCharPref(in string pref);

  /* get & set defaults */
  boolean GetDefaultBoolPref(in string pref);
  long    GetDefaultIntPref(in string pref);

  void SetDefaultBoolPref(in string pref, in boolean value);
  void SetDefaultCharPref(in string pref, in string value);
  void SetDefaultIntPref(in string pref, in long value);

  /* unichar & localized unichar prefs */
  wstring CopyUnicharPref(in string pref);
  wstring CopyDefaultUnicharPref(in string pref);
  void SetUnicharPref(in string pref, in wstring value);
  void SetDefaultUnicharPref(in string pref, in wstring value);
  wstring getLocalizedUnicharPref(in string pref);
  wstring getDefaultLocalizedUnicharPref(in string pref);

  /* file & filespec prefs */
  nsIFileSpec  GetFilePref(in string pref);
  void         SetFilePref(in string pref, in nsIFileSpec value, in boolean setDefault);
  nsILocalFile getFileXPref(in string pref);
  void         setFileXPref(in string pref, in nsILocalFile value);

  /* callbacks */
  [noscript] void RegisterCallback(in string domain, in PrefChangedFunc callback, in voidPtr closure);
  [noscript] void UnregisterCallback(in string domain, in PrefChangedFunc callback, in voidPtr closure);

  /**
   * EnumerateChildren
   *
   * Call back function "callback" with every preference string
   * having prefix "parent". Pass "data" to "callback" when calling.
   * 
   * @param parent A string representation of a prefix of preferences
   * @param callback A function to call back for each matching preference
   * @param data A piece of data to pass on to the callback
   */
  [noscript] void EnumerateChildren(in string parent, in PrefEnumerationFunc callback, in voidPtr data);
};
