b107f3ff5f
r=jband, r=ben (though I've changed things slightly since they saw it.) git-svn-id: svn://10.0.0.236/trunk@64105 18797224-902f-48f8-a5cc-f745e15eee43
121 lines
3.4 KiB
JavaScript
121 lines
3.4 KiB
JavaScript
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/*
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* Functions for initializing and updating the JavaScript Console.
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*/
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/*
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* Listener to be registered with the console service, called on new errors.
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*/
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var consoleListener = {
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observe : function(messageObject) {
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appendMessage(messageObject);
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}
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}
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/*
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* Gets the current context of the console service and dumps it to the window,
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* and registers a listener with the service to be called on additional errors.
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*/
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function onLoadJSConsole()
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{
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dump('\n\nconsole loading\n\n');
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try {
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var cs_class = Components.classes['consoleservice'];
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var cs_iface = Components.interfaces.nsIConsoleService;
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var cs_isupports = cs_class.getService();
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var cs = cs_isupports.QueryInterface(cs_iface);
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} catch(exn) {
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// Couldn't get the console service for some reason...
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// pretend it never happened.
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// XXX instead should write some message to the console re:
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// unable to get console service.
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return;
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}
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dump('\n\ngot console service\n\n');
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var o1 = {}; // Throwaway references to support 'out' parameters.
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var o2 = {};
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var messages;
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try {
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cs.getMessageArray(o1, o2);
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messages = o1.value;
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} catch (exn) {
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// getMessageArray throws an exception when there are no elements.
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messages = [];
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}
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for (i = 0; i < messages.length; i++) {
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appendMessage(messages[i]);
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}
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dump('\n\nregistering...\n');
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cs.registerListener(consoleListener);
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dump('registered listener\n\n');
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}
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function onUnloadJSConsole()
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{
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// keep a global ref. to it instead???
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try {
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var cs_class = Components.classes['consoleservice'];
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var cs_iface = Components.interfaces.nsIConsoleService;
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var cs_isupports = cs_class.getService();
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var cs = cs_isupports.QueryInterface(cs_iface);
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} catch(exn) {
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// Couldn't get the console service for some reason...
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// pretend it never happened.
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return;
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}
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cs.unregisterListener(consoleListener);
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}
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/*
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* Given a message, write it to the page.
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*
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* TODO: (When interesting subclasses of message objects become available) -
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* reflect structure of messages (e.g. lineno, etc.) as CSS-decorable structure.
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*/
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function appendMessage(messageObject)
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{
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var c = document.getElementById("console");
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var e = document.createElement("message");
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var t = document.createTextNode(messageObject.message);
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e.appendChild(t);
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c.appendChild(e);
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}
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// XXX q: if window is open, does it grow forever? Is that OK?
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// or should it do its own retiring?
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