Commit 81132bd3 authored by Leigh B. Stoller's avatar Leigh B. Stoller

Some javascript debugging code I found with google.

Turn on $javascript_debug at the top of menu.php3, and then use warn()
statements in the code to have those debug statements turn up at the
bottom of the page. This is the most cross-browser implementation I could
find (which means it works on Safari, IE, and Firefox).
parent ff6938f9
Author: Oliver Steele
Copyright: Copyright 2006 Oliver Steele. All rights reserved.
License: MIT License (Open Source)
Created: 2006-03-03
Modified: 2006-03-20
== Usage
Include this line in the +head+ of an HTML document:
<script type="text/javascript" src="inline-console.js"></script>
This will give you a console area at the bottom of your web page.
for an example.)
The text input field at the top of the console can be used to
evaluate JavaScript expressions and statements. The results are
appended to the console.
This file also defines unary functions +info+, +warning+, +debug+,
and +error+, that log their output to the console.
== Input Area
Text that is entered into the input area is evaluated, and the
result is displayed in the console.
<tt>properties(object)</tt> displays all the properties of +object+.
(If +readable.js+ is loaded, only the first 10 properties will be
displayed. To display all the properties, evaluate
properties //limit=null
instead. See the Customization section for more about overriding
the +readable.js+ defaults.)
== Customization
To customize the location of the console, define
<div id="inline-console"></div>
in the HTML file.
If +readable.js+ is loaded, it will limit the length and recursion
level of the displayed string. You can change these limits
globally by assigning to +ReadableLogger.defaults+, e.g.:
You can also change these limits for a single evaluation by
appending a comment string to the end of the value, e.g.:
See the {Readable documentation}[] for the complete list of options.
== Related
fvlogger[] provides
finer-grained control over the display of log messages. This file
may be used in conjunction with fvlogger simply by including both
files. In this case, the fvlogger logging functions are used
instead of the functions defined here, and if <div
id="inline-console"> is not defined, it is appended to the end of
the the #fvlogger div, rather than to the end of the HTML body.
provides a representation of JavaScript values (e.g. "<tt>{a:
1}</tt>" rather than "<tt>[object Object]</tt>") and variadic
logging functions (e.g. <tt>log(key, '->', value)</tt> instead of
<tt>log(key + '->' + value)</tt>). This file may be used in
conjunction with +readable.js+ by including +readable.js+ *after*
this file.
{Simple logging for OpenLaszlo}[]
defines logging functions that are compatible with those defined by this
file. This allows libraries that use these functions to be used
in both OpenLaszlo programs and in DHTML.
var InlineConsole = {};
// A dictionary of functions that are available only inside the
// read-eval-print loop (so that they don't collide with the global
// namespace). Add properties to +InlineConsole.bindings+ to add
// debug functions.
InlineConsole.bindings = {};
// Return a sorted list of the properties of +object+. = function (object) {
var ar = [];
for (var i in object)
return ar;
InlineConsole.utils = {};
InlineConsole.utils.shallowCopy = function(object) {
var copy = new Object;
InlineConsole.utils.update(copy, object);
return copy;
InlineConsole.utils.update = function(target, source) {
for (var p in source)
target[p] = source[p];
// "//a=1,b=2" => {a: 1, b: 2}
InlineConsole.parseOptions = function(input) {
var options = {};
var m = input.match(/\/\/\s*(.*)\s*$/);
if (!m) return options;
var lines = m[1].split(/\s*,\s*/);
for (var i = 0; i < lines.length; i++) {
var pair = lines[i].split('=', 2);
if (!pair) continue;
var key = pair[0], value = pair[1];
options[key] = Number(value);
return options;
// Read-eval-print the string in +input+.
InlineConsole.readEvalPrint = function(input) {
var value;
try {
with (InlineConsole.bindings)
value = eval(input);
catch (e) {error(e.message); return}
var options = InlineConsole.parseOptions(input);
InlineConsole.display(value, options);
// Use +info+ to display +value+, with +ReadableLogger.defaults+ (if
// it exists) fluidly let to the options in +options+.
InlineConsole.display = function(value, options) {
var defaults = null;
// If ReadableLogger hasn't been loaded, defaults remains null.
try {defaults = ReadableLogger.defaults} catch (e) {}
try {
if (defaults) {
var newOptions = InlineConsole.utils.shallowCopy(defaults);
InlineConsole.utils.update(newOptions, options);
ReadableLogger.defaults = newOptions;
} finally {
if (defaults) ReadableLogger.defaults = defaults;
// Read-eval-print the contents of the field named by +id+.
InlineConsole.evalField = function(id) {
// If an element with id=inline-console is defined, create the console
// within that element. Otherwise, if +fvlogger+ is defined, append
// the console to it. Otherwise stick it at the bottom.
InlineConsole.addConsole = function() {
var e = document.getElementById('inline-console');
var fv = document.getElementById('fvlogger');
if (!e) {
e = document.createElement('div');
(fv || document.body).appendChild(e);
e.innerHTML = InlineConsole.CONSOLE_HTML;
if (!fv)
// The text that is used to initialize the console.
InlineConsole.CONSOLE_HTML = '<form id="debugger" action="#" method="get" onsubmit="InlineConsole.evalField(\'eval\'); return false"><div><input type="button" onclick="InlineConsole.evalField(\'eval\'); return false;" value="Eval"/><input type="text" size="80" id="eval" value="" onkeyup="/*event.preventDefault(); */return false;"/></div></form>';
// The logging functions in this file append text. (These functions
// won't be used if another logger, such as fvlogger, is loaded.)
InlineConsole.log_element = null;
InlineConsole.initializeLoggingFunctions = function() {
try {
// If all the logging functions are defined, use them.
var logging_functions = [info, warn, error, message];
for (var i in logging_functions)
if (typeof logging_functions[i] != 'function')
throw "break";
} catch (e) {
// Otherwise define our own logging functions.
InlineConsole.log_element = document.createElement('div');
var f = function(msg) {
var span = document.createElement('div');
span.innerHTML = String(msg).replace(/&/g, '&amp;').replace(/</g, '&lt;');
// Leave intact any logging names that are already defined
// as functions.
try {if (typeof debug != 'function') throw 0} catch (e) {debug = f}
try {if (typeof error != 'function') throw 0} catch (e) {error = f}
try {if (typeof info != 'function') throw 0} catch (e) {info = f}
try {if (typeof warn != 'function') throw 0} catch (e) {warn = f}
if (window.addEventListener) {
window.addEventListener('load', InlineConsole.addConsole, false);
} else if (window.attachEvent) {
window.attachEvent('onload', InlineConsole.addConsole);
} else {
window.onload = (function() {
var nextfn = window.onload || function(){};
return function() {
......@@ -10,6 +10,7 @@ $login_status = CHECKLOGIN_NOTLOGGEDIN;
$drewheader = 0;
$noheaders = 0;
$autorefresh = 0;
$javascript_debug = 0;
$currentusage = 1;
$currently_busy = 0;
$bodyclosestring = "";
......@@ -619,7 +620,7 @@ function PAGEBEGINNING( $title, $nobanner = 0, $nocontent = 0,
global $TBDIR, $WWW;
global $MAINPAGE;
global $TBDOCBASE;
global $autorefresh, $currentusage;
global $autorefresh, $currentusage, $javascript_debug;
$MAINPAGE = !strcmp($TBDIR, "/usr/testbed/");
......@@ -655,6 +656,10 @@ function PAGEBEGINNING( $title, $nobanner = 0, $nocontent = 0,
if ($extra_headers) {
echo $extra_headers;
if ($javascript_debug) {
echo "<script type='text/javascript'
echo "</head>
<body bgcolor='#FFFFFF'
topmargin='0' leftmargin='0' marginheight='0' marginwidth='0'>\n";
......@@ -895,7 +900,7 @@ function ENDPAGE() {
function PAGEFOOTER($view = NULL) {
global $TBMAINSITE, $SSL_PROTOCOL, $bodyclosestring, $currently_busy;
global $login_user;
global $login_user, $javascript_debug;
if ($currently_busy) {
......@@ -953,6 +958,10 @@ function PAGEFOOTER($view = NULL) {
echo "</div>";
echo "</div>";
if ($javascript_debug) {
echo "<div id='inline-console'></div>\n";
# Plug the home site from all others.
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