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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 ***** */

/*
 * Interfaces for representing cross-language exceptions and stack traces.
 */


#include "nsISupports.idl"
#include "nsIProgrammingLanguage.idl"

// XXX - most "string"s in this file should probably move to Unicode
//       so may as well use AStrings...


[scriptable, uuid(91d82105-7c62-4f8b-9779-154277c0ee90)]
interface nsIStackFrame : nsISupports
{
    // see nsIProgrammingLanguage for list of language consts
    readonly attribute PRUint32                language;
    readonly attribute string                  languageName;
    readonly attribute string                  filename;
    readonly attribute string                  name;
    // Valid line numbers begin at '1'. '0' indicates unknown.
    readonly attribute PRInt32                 lineNumber;
    readonly attribute string                  sourceLine;
    readonly attribute nsIStackFrame           caller;

    string toString();
};

[scriptable, uuid(F3A8D3B4-C424-4edc-8BF6-8974C983BA78)]
interface nsIException : nsISupports
{
    // A custom message set by the thrower.
    readonly attribute string                  message;
    // The nsresult associated with this exception.
    readonly attribute nsresult                result;
    // The name of the error code (ie, a string repr of |result|)
    readonly attribute string                  name;

    // Filename location.  This is the location that caused the
    // error, which may or may not be a source file location.
    // For example, standard language errors would generally have
    // the same location as their top stack entry.  File
    // parsers may put the location of the file they were parsing,
    // etc.

    // null indicates "no data"
    readonly attribute string                  filename;
    // Valid line numbers begin at '1'. '0' indicates unknown.
    readonly attribute PRUint32                lineNumber;
    // Valid column numbers begin at 0. 
    // We don't have an unambiguous indicator for unknown.
    readonly attribute PRUint32                columnNumber;

    // A stack trace, if available.
    readonly attribute nsIStackFrame           location;
    // An inner exception that triggered this, if available.
    readonly attribute nsIException            inner;

    // Arbitary data for the implementation.
    readonly attribute nsISupports             data;

    // A generic formatter - make it suitable to print, etc.
    string toString();
};