/* -*- Mode: IDL; tab-width: 2; 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) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Erik van der Poel
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 "nsISupports.idl"

[scriptable, uuid(924d98d9-3518-4cb4-8708-c74fe8e3ec3c)]
interface nsIFontEnumerator : nsISupports
{
  /**
   * Return a sorted array of the names of all installed fonts.
   *
   * @param  aCount     returns number of names returned
   * @param  aResult    returns array of names
   * @return void
   */
  void EnumerateAllFonts(out PRUint32 aCount,
    [retval, array, size_is(aCount)] out wstring aResult);

  /**
   * Return a sorted array of names of fonts that support the given language
   * group and are suitable for use as the given CSS generic font.
   *
   * @param  aLangGroup language group
   * @param  aGeneric   CSS generic font
   * @param  aCount     returns number of names returned
   * @param  aResult    returns array of names
   * @return void
   */
  void EnumerateFonts(in string aLangGroup, in string aGeneric,
    out PRUint32 aCount, [retval, array, size_is(aCount)] out wstring aResult);

  /**
    @param  aLangGroup language group
    @return bool do we have a font for this language group
   */
  void HaveFontFor(in string aLangGroup, [retval] out boolean aResult);

  /**
   * @param  aLangGroup language group
   * @param  aGeneric CSS generic font
   * @return suggested default font for this language group and generic family
   */
  wstring getDefaultFont(in string aLangGroup, in string aGeneric);

  /**
   * update the global font list
   * return true if font list is changed
   */
  boolean updateFontList();

  /**
   * get the standard family name on the system from given family
   * @param  aName family name which may be alias
   * @return the standard family name on the system, if given name does not
   *         exist, returns empty string
   */
  wstring getStandardFamilyName(in wstring aName);
};