зеркало из https://github.com/mozilla/gecko-dev.git
103 строки
4.0 KiB
JavaScript
103 строки
4.0 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- *//* vim:set ts=2 sw=2 sts=2 ci et: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Places Bookmark Properties.
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*
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* The Initial Developer of the Original Code is Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Joe Hughes <jhughes@google.com>
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* Ben Goodger <beng@google.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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* This file contains functions that are useful for debugging purposes from
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* within JavaScript code.
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*/
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const NS_ASSERT_ENVIRONMENT_VARIABLE_NAME = "XUL_ASSERT_PROMPT";
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var gTraceOnAssert = true;
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/**
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* This function provides a simple assertion function for JavaScript.
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* If the condition is true, this function will do nothing. If the
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* condition is false, then the message will be printed to the console
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* and an alert will appear showing a stack trace, so that the (alpha
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* or nightly) user can file a bug containing it. For future enhancements,
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* see bugs 330077 and 330078.
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*
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* To suppress the dialogs, you can run with the environment variable
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* XUL_ASSERT_PROMPT set to 0 (if unset, this defaults to 1).
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*
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* @param condition represents the condition that we're asserting to be
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* true when we call this function--should be
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* something that can be evaluated as a boolean.
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* @param message a string to be displayed upon failure of the assertion
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*/
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function NS_ASSERT(condition, message) {
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if (condition)
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return;
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var caller = arguments.callee.caller;
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var assertionText = "ASSERT: " + message + "\n";
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dump(assertionText);
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var stackText = "";
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if (gTraceOnAssert) {
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stackText = "Stack Trace: \n";
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var count = 0;
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while (caller) {
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stackText += count++ + ":" + caller.name + "(";
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for (var i = 0; i < caller.arguments.length; ++i) {
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var arg = caller.arguments[i];
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stackText += arg;
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if (i < caller.arguments.length - 1)
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stackText += ",";
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}
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stackText += ")\n";
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caller = caller.arguments.callee.caller;
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}
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}
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var environment = Components.classes["@mozilla.org/process/environment;1"].
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getService(Components.interfaces.nsIEnvironment);
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if (environment.exists(NS_ASSERT_ENVIRONMENT_VARIABLE_NAME) &&
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!parseInt(environment.get(NS_ASSERT_ENVIRONMENT_VARIABLE_NAME)))
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return;
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var source = null;
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if (this.window)
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source = window;
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var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].
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getService(Components.interfaces.nsIPromptService);
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ps.alert(source, "Assertion Failed", assertionText + stackText);
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}
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