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Code Editor : logger.js

Created By: Corey Johnson
E-mail: probablyCorey@gmail.com

Requires: Prototype Javascript library (http://prototype.conio.net/)

Use it all you want. Just remember to give me some credit :)

// ------------
// Custom Event
// ------------

CustomEvent = Class.create();
CustomEvent.prototype = {
  initialize : function() {
  	this.listeners = []
  },

addListener : function(method) {
		this.listeners.push(method)
	},

removeListener : function(method) {
		var foundIndexes = this._findListenerIndexes(method)

for(var i = 0; i < foundIndexes.length; i++) {
			this.listeners.splice(foundIndexes[i], 1)
		}
	},

dispatch : function(handler) {
		for(var i = 0; i < this.listeners.length; i++) {
			try {
				this.listeners[i](handler)
			}
			catch (e) {
				alert("Could not run the listener " + this.listeners[i] + ". " + e)
			}
		}
	},

// Private Methods
	// ---------------
	_findListenerIndexes : function(method) {
		var indexes = []
		for(var i = 0; i < this.listeners.length; i++) {
			if (this.listeners[i] == method) {
				indexes.push(i)
			}
		}

return indexes
	}
};

// ------
// Cookie
// ------

var Cookie = {
	set : function(name, value, expirationInDays, path) {
		var cookie = escape(name) + "=" + escape(value)

if (expirationInDays) {
			var date = new Date()
			date.setDate(date.getDate() + expirationInDays)
			cookie += "; expires=" + date.toGMTString()
		}

if (path) {
			cookie += ";path=" + path
		}

document.cookie = cookie

if (value && (expirationInDays == undefined || expirationInDays > 0) && !this.get(name)) {
			Logger.error("Cookie (" + name + ") was not set correctly... The value was " + value.toString().length + " charachters long (This may be over the cookie limit)");
		}
	},

get : function(name) {
		var pattern = "(^|;)\\s*" + escape(name) + "=([^;]+)"

var m = document.cookie.match(pattern)
		if (m && m[2]) {
			return unescape(m[2])
		}
		else return null
	},

getAll : function() {
		var cookies = document.cookie.split(';')
		var cookieArray = []

for (var i = 0; i < cookies.length; i++) {
			try {
				var name = unescape(cookies[i].match(/^\s*([^=]+)/m)[1])
				var value = unescape(cookies[i].match(/=(.*$)/m)[1])
			}
			catch (e) {
				continue
			}

cookieArray.push({name : name, value : value})

if (cookieArray[name] != undefined) {
				Logger.waring("Trying to retrieve cookie named(" + name + "). There appears to be another property with this name though.");
			}

cookieArray[name] = value
		}

return cookieArray
	},

clear : function(name) {
		this.set(name, "", -1)
	},

clearAll : function() {
		var cookies = this.getAll()

for(var i = 0; i < cookies.length; i++) {
			this.clear(cookies[i].name)
		}

}
};

// ------
// Logger
// -----

Logger = {
	logEntries : [],

onupdate : new CustomEvent(),
	onclear : new CustomEvent(),

// Logger output
  log : function(message, tag) {
	  var logEntry = new LogEntry(message, tag || "info")
		this.logEntries.push(logEntry)
		this.onupdate.dispatch(logEntry)
	},

info : function(message) {
		this.log(message, 'info')
		if(typeof(console) != "undefined")
			console.info(message);
	},

debug : function(message) {
		this.log(message, 'debug')
		if(typeof(console) != "undefined")
			console.debug(message);
	},

warn : function(message) {
	  this.log(message, 'warning')
		if(typeof(console) != "undefined")
			console.warn(message);
	},

error : function(message, error) {
	  this.log(message + ": \n" + error, 'error')
		if(typeof(console) != "undefined")
			console.error(message + ": \n" + error);

clear : function () {
		this.logEntries = []
		this.onclear.dispatch()
	}
};

LogEntry = Class.create()
LogEntry.prototype = {
    initialize : function(message, tag) {
      this.message = message
      this.tag = tag
    }
};

LogConsole = Class.create();
LogConsole.prototype = {

// Properties
  // ----------
  commandHistory : [],
  commandIndex : 0,

hidden : true,

// Methods
  // -------

initialize : function(toggleKey) {
    this.outputCount = 0
    this.tagPattern = Cookie.get('tagPattern') || ".*"

// I hate writing javascript in HTML... but what's a better alternative
    this.logElement = document.createElement('div')
    document.body.appendChild(this.logElement)
    Element.hide(this.logElement)

this.logElement.style.position = "absolute"
    this.logElement.style.left = '0px'
    this.logElement.style.width = '100%'

this.logElement.style.textAlign = "left"
    this.logElement.style.fontFamily = "lucida console"
    this.logElement.style.fontSize = "100%"
    this.logElement.style.backgroundColor = 'darkgray'
    this.logElement.style.opacity = 0.9
    this.logElement.style.zIndex = 2000

// Add toolbarElement
    this.toolbarElement = document.createElement('div')
    this.logElement.appendChild(this.toolbarElement)
    this.toolbarElement.style.padding = "0 0 0 2px"

// Add buttons
    this.buttonsContainerElement = document.createElement('span')
    this.toolbarElement.appendChild(this.buttonsContainerElement)

this.buttonsContainerElement.innerHTML += '<button onclick="logConsole.toggle()" style="float:right;color:black">close</button>'
    this.buttonsContainerElement.innerHTML += '<button onclick="Logger.clear()" style="float:right;color:black">clear</button>'
	if(!Prado.Inspector.disabled)
		this.buttonsContainerElement.innerHTML += '<button onclick="Prado.Inspector.inspect()" style="float:right;color:black; margin-right:15px;">Object Tree</button>'

//Add Tag Filter
		this.tagFilterContainerElement = document.createElement('span')
    this.toolbarElement.appendChild(this.tagFilterContainerElement)
    this.tagFilterContainerElement.style.cssFloat = 'left'
    this.tagFilterContainerElement.appendChild(document.createTextNode("Log Filter"))

this.tagFilterElement = document.createElement('input')
    this.tagFilterContainerElement.appendChild(this.tagFilterElement)
    this.tagFilterElement.style.width = '200px'
    this.tagFilterElement.value = this.tagPattern
    this.tagFilterElement.setAttribute('autocomplete', 'off') // So Firefox doesn't flip out

Event.observe(this.tagFilterElement, 'keyup', this.updateTags.bind(this))
    Event.observe(this.tagFilterElement, 'click', function() {this.tagFilterElement.select()}.bind(this))

// Add outputElement
    this.outputElement = document.createElement('div')
    this.logElement.appendChild(this.outputElement)
    this.outputElement.style.overflow = "auto"
    this.outputElement.style.clear = "both"
    this.outputElement.style.height = "200px"
    this.outputElement.style.backgroundColor = 'black'

this.inputContainerElement = document.createElement('div')
    this.inputContainerElement.style.width = "100%"
    this.logElement.appendChild(this.inputContainerElement)

this.inputElement = document.createElement('input')
    this.inputContainerElement.appendChild(this.inputElement)
    this.inputElement.style.width = '100%'
    this.inputElement.style.borderWidth = '0px' // Inputs with 100% width always seem to be too large (I HATE THEM) they only work if the border, margin and padding are 0
    this.inputElement.style.margin = '0px'
    this.inputElement.style.padding = '0px'
    this.inputElement.value = 'Type command here'
    this.inputElement.setAttribute('autocomplete', 'off') // So Firefox doesn't flip out

Event.observe(this.inputElement, 'keyup', this.handleInput.bind(this))
    Event.observe(this.inputElement, 'click', function() {this.inputElement.select()}.bind(this))

if(document.all && !window.opera)
	{
		window.setInterval(this.repositionWindow.bind(this), 500)
	}
	else
	{
		this.logElement.style.position="fixed";
		this.logElement.style.bottom="0px";
	}
	var self=this;
	Event.observe(document, 'keydown', function(e)
	{
		if((e.altKey==true) && Event.keyCode(e) == toggleKey ) //Alt+J | Ctrl+J
			self.toggle();
	});

// Listen to the logger....
    Logger.onupdate.addListener(this.logUpdate.bind(this))
    Logger.onclear.addListener(this.clear.bind(this))

// Preload log element with the log entries that have been entered
		for (var i = 0; i < Logger.logEntries.length; i++) {
  		this.logUpdate(Logger.logEntries[i])
  	}

// Feed all errors into the logger (For some unknown reason I can only get this to work
  	// with an inline event declaration)
  	Event.observe(window, 'error', function(msg, url, lineNumber) {Logger.error("Error in (" + (url || location) + ") on line "+lineNumber+"", msg)})

// Allow acess key link
    var accessElement = document.createElement('span')
    accessElement.innerHTML = '<button style="position:absolute;top:-100px" onclick="javascript:logConsole.toggle()" accesskey="d"></button>'
  	document.body.appendChild(accessElement)

if (Cookie.get('ConsoleVisible') == 'true') {
		  this.toggle()
		}
	},

toggle : function() {
	  if (this.logElement.style.display == 'none') {
		  this.show()
		}
		else {
			this.hide()
		}
	},

show : function() {
	  Element.show(this.logElement)
	  this.outputElement.scrollTop = this.outputElement.scrollHeight // Scroll to bottom when toggled
	  if(document.all && !window.opera)
		  this.repositionWindow();
	  Cookie.set('ConsoleVisible', 'true')
 	  this.inputElement.select()
 	  this.hidden = false;
	},

hide : function() {
	  this.hidden = true;
	  Element.hide(this.logElement)
	  Cookie.set('ConsoleVisible', 'false')
	},

output : function(message, style) {
			// If we are at the bottom of the window, then keep scrolling with the output
			var shouldScroll = (this.outputElement.scrollTop + (2 * this.outputElement.clientHeight)) >= this.outputElement.scrollHeight

this.outputCount++
	  	style = (style ? style += ';' : '')
	  	style += 'padding:1px;margin:0 0 5px 0'

if (this.outputCount % 2 == 0) style += ";background-color:#101010"

message = message || "undefined"
	  	message = message.toString().escapeHTML()

this.outputElement.innerHTML += "<pre style='" + style + "'>" + message + "</pre>"

if (shouldScroll) {
				this.outputElement.scrollTop = this.outputElement.scrollHeight
			}
	},

updateTags : function() {
		var pattern = this.tagFilterElement.value

if (this.tagPattern == pattern) return

try {
			new RegExp(pattern)
		}
		catch (e) {
			return
		}

this.tagPattern = pattern
		Cookie.set('tagPattern', this.tagPattern)

this.outputElement.innerHTML = ""

// Go through each log entry again
		this.outputCount = 0;
		for (var i = 0; i < Logger.logEntries.length; i++) {
  		this.logUpdate(Logger.logEntries[i])
  	}
	},

repositionWindow : function() {
		var offset = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop
		var pageHeight = self.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
		this.logElement.style.top = (offset + pageHeight - Element.getHeight(this.logElement)) + "px"
	},

// Event Handlers
	// --------------

logUpdate : function(logEntry) {
		if (logEntry.tag.search(new RegExp(this.tagPattern, 'igm')) == -1) return
		var style = ''
	  if (logEntry.tag.search(/error/) != -1) style += 'color:red'
	  else if (logEntry.tag.search(/warning/) != -1) style += 'color:orange'
	  else if (logEntry.tag.search(/debug/) != -1) style += 'color:green'
 	  else if (logEntry.tag.search(/info/) != -1) style += 'color:white'
	  else style += 'color:yellow'

this.output(logEntry.message, style)
	},

clear : function(e) {
		this.outputElement.innerHTML = ""
	},

handleInput : function(e) {
		if (e.keyCode == Event.KEY_RETURN ) {
	  	var command = this.inputElement.value

switch(command) {
	    	case "clear":
	      		Logger.clear()
	      		break

default:
	      	var consoleOutput = ""

try {
	        	consoleOutput = eval(this.inputElement.value)
	      	}
	      	catch (e) {
	        	Logger.error("Problem parsing input <" + command + ">", e)
	        	break
					}

Logger.log(consoleOutput)
	      	break
			}

if (this.inputElement.value != "" && this.inputElement.value != this.commandHistory[0]) {
	    	this.commandHistory.unshift(this.inputElement.value)
	  	}

this.commandIndex = 0
	  	this.inputElement.value = ""
		}
    else if (e.keyCode == Event.KEY_UP && this.commandHistory.length > 0) {
    	this.inputElement.value = this.commandHistory[this.commandIndex]

if (this.commandIndex < this.commandHistory.length - 1) {
      	this.commandIndex += 1
      }
    }
    else if (e.keyCode == Event.KEY_DOWN && this.commandHistory.length > 0) {
    	if (this.commandIndex > 0) {
      	this.commandIndex -= 1
	    }

this.inputElement.value = this.commandHistory[this.commandIndex]
	  }
 		else {
    		this.commandIndex = 0
    }
	}
};

// -------------------------
// Helper Functions And Junk
// -------------------------
function inspect(o)
{
	var objtype = typeof(o);
	if (objtype == "undefined") {
		return "undefined";
	} else if (objtype == "number" || objtype == "boolean") {
		return o + "";
	} else if (o === null) {
		return "null";
	}

try {
            var ostring = (o + "");
        } catch (e) {
            return "[" + typeof(o) + "]";
        }

if (typeof(o) == "function")
	{
            o = ostring.replace(/^\s+/, "");
            var idx = o.indexOf("{");
            if (idx != -1) {
                o = o.substr(0, idx) + "{...}";
            }
			return o;
       }

var reprString = function (o)
	{
		return ('"' + o.replace(/(["\\])/g, '\\$1') + '"'
			).replace(/[\f]/g, "\\f"
			).replace(/[\b]/g, "\\b"
			).replace(/[\n]/g, "\\n"
			).replace(/[\t]/g, "\\t"
			).replace(/[\r]/g, "\\r");
	};

if (objtype == "string") {
		return reprString(o);
	}
	// recurse
	var me = arguments.callee;
	// short-circuit for objects that support "json" serialization
	// if they return "self" then just pass-through...
	var newObj;
	if (typeof(o.__json__) == "function") {
		newObj = o.__json__();
		if (o !== newObj) {
			return me(newObj);
		}
	}
	if (typeof(o.json) == "function") {
		newObj = o.json();
		if (o !== newObj) {
			return me(newObj);
		}
	}
	// array
	if (objtype != "function" && typeof(o.length) == "number") {
		var res = [];
		for (var i = 0; i < o.length; i++) {
			var val = me(o[i]);
			if (typeof(val) != "string") {
				val = "undefined";
			}
			res.push(val);
		}
		return "[" + res.join(", ") + "]";
	}

// generic object code path
	res = [];
	for (var k in o) {
		var useKey;
		if (typeof(k) == "number") {
			useKey = '"' + k + '"';
		} else if (typeof(k) == "string") {
			useKey = reprString(k);
		} else {
			// skip non-string or number keys
			continue;
		}
		val = me(o[k]);
		if (typeof(val) != "string") {
			// skip non-serializable values
			continue;
		}
		res.push(useKey + ":" + val);
	}
	return "{" + res.join(", ") + "}";
};

Array.prototype.contains = function(object) {
	for(var i = 0; i < this.length; i++) {
		if (object == this[i]) return true
	}

return false
};

// Helper Alias for simple logging
var puts = function() {return Logger.log(arguments[0], arguments[1])};

/*************************************

Javascript Object Tree
	version 1.0
	last revision:04.11.2004
	steve@slayeroffice.com
	http://slayeroffice.com

Please notify me of any modifications
	you make to this code so that I can
	update the version hosted on slayeroffice.com

************************************/
if(typeof Prado == "undefined")
	var Prado = {};
Prado.Inspector =
{
	d : document,
	types : new Array(),
	objs : new Array(),
	hidden : new Array(),
	opera : window.opera,
	displaying : '',
	nameList : new Array(),

format : function(str) {
		if(typeof(str) != "string") return str;
		str=str.replace(/</g,"&lt;");
		str=str.replace(/>/g,"&gt;");
		return str;
	},

parseJS : function(obj) {
		var name;
		if(typeof obj == "string") {  name = obj; obj = eval(obj); }
		win= typeof obj == 'undefined' ? window : obj;
		this.displaying = name ? name : win.toString();
		for(js in win) {
			try {
				if(win[js] && js.toString().indexOf("Inspector")==-1 && (win[js]+"").indexOf("[native code]")==-1) {

t=typeof(win[js]);
					if(!this.objs[t.toString()]) {
						this.types[this.types.length]=t;
						this.objs[t]={};
						this.nameList[t] = new Array();
					}
					this.nameList[t].push(js);
					this.objs[t][js] = this.format(win[js]+"");
				}
			} catch(err) { }
		}

for(i=0;i<this.types.length;i++)
			this.nameList[this.types[i]].sort();
	},

show : function(objID) {
		this.d.getElementById(objID).style.display=this.hidden[objID]?"none":"block";
		this.hidden[objID]=this.hidden[objID]?0:1;
	},

changeSpan : function(spanID) {
		if(this.d.getElementById(spanID).innerHTML.indexOf("+")>-1){
			this.d.getElementById(spanID).innerHTML="[-]";
		} else {
			this.d.getElementById(spanID).innerHTML="[+]";
		}
	},

buildInspectionLevel : function()
	{
		var display = this.displaying;
		var list = display.split(".");
		var links = ["<a href=\"javascript:var_dump()\">[object Window]</a>"];
		var name = '';
		if(display.indexOf("[object ") >= 0) return links.join(".");
		for(var i = 0; i < list.length; i++)
		{
			name += (name.length ? "." : "") + list[i];
			links[i+1] = "<a href=\"javascript:var_dump('"+name+"')\">"+list[i]+"</a>";
		}
		return links.join(".");
	},

buildTree : function() {
		mHTML = "<div>Inspecting "+this.buildInspectionLevel()+"</div>";
		mHTML +="<ul class=\"topLevel\">";
		this.types.sort();
		var so_objIndex=0;
		for(i=0;i<this.types.length;i++)
		{
			mHTML+="<li style=\"cursor:pointer;\" onclick=\"Prado.Inspector.show('ul"+i+"');Prado.Inspector.changeSpan('sp" + i + "')\"><span id=\"sp" + i + "\">[+]</span><b>" + this.types[i] + "</b> (" + this.nameList[this.types[i]].length + ")</li><ul style=\"display:none;\" id=\"ul"+i+"\">";
			this.hidden["ul"+i]=0;
			for(e=0;e<this.nameList[this.types[i]].length;e++)
			{
				var prop = this.nameList[this.types[i]][e];
				var value = this.objs[this.types[i]][prop]
				var more = "";
				if(value.indexOf("[object ") >= 0 && /^[a-zA-Z_]/.test(prop))
				{
					if(this.displaying.indexOf("[object ") < 0)
						more = " <a href=\"javascript:var_dump('"+this.displaying+"."+prop+"')\"><b>more</b></a>";
					else if(this.displaying.indexOf("[object Window]") >= 0)
						more = " <a href=\"javascript:var_dump('"+prop+"')\"><b>more</b></a>";
				}
				mHTML+="<li style=\"cursor:pointer;\" onclick=\"Prado.Inspector.show('mul" + so_objIndex + "');Prado.Inspector.changeSpan('sk" + so_objIndex + "')\"><span id=\"sk" + so_objIndex + "\">[+]</span>" + prop + "</li><ul id=\"mul" + so_objIndex + "\" style=\"display:none;\"><li style=\"list-style-type:none;\"><pre>" + value + more + "</pre></li></ul>";
				this.hidden["mul"+so_objIndex]=0;
				so_objIndex++;
			}
			mHTML+="</ul>";
		}
		mHTML+="</ul>";
		this.d.getElementById("so_mContainer").innerHTML =mHTML;
	},

handleKeyEvent : function(e) {
		keyCode=document.all?window.event.keyCode:e.keyCode;
		if(keyCode==27) {
			this.cleanUp();
		}
	},

cleanUp : function()
	{
		if(this.d.getElementById("so_mContainer"))
		{
			this.d.body.removeChild(this.d.getElementById("so_mContainer"));
			this.d.body.removeChild(this.d.getElementById("so_mStyle"));
			if(typeof Event != "undefined")
				Event.stopObserving(this.d, "keydown", this.dKeyDownEvent);
			this.types = new Array();
			this.objs = new Array();
			this.hidden = new Array();
		}
	},

disabled : document.all && !this.opera,

inspect : function(obj)
	{
		if(this.disabled)return alert("Sorry, this only works in Mozilla and Firefox currently.");
		this.cleanUp();
		mObj=this.d.body.appendChild(this.d.createElement("div"));
		mObj.id="so_mContainer";
		sObj=this.d.body.appendChild(this.d.createElement("style"));
		sObj.id="so_mStyle";
		sObj.type="text/css";
		sObj.innerHTML = this.style;
		this.dKeyDownEvent = this.handleKeyEvent.bind(this);
		if(typeof Event != "undefined")
			Event.observe(this.d, "keydown", this.dKeyDownEvent);

this.parseJS(obj);
		this.buildTree();

cObj=mObj.appendChild(this.d.createElement("div"));
		cObj.className="credits";
		cObj.innerHTML = "<b>[esc] to <a href=\"javascript:Prado.Inspector.cleanUp();\">close</a></b><br />Javascript Object Tree V2.0.";

window.scrollTo(0,0);
	},

style : "#so_mContainer { position:absolute; top:5px; left:5px; background-color:#E3EBED; text-align:left; font:9pt verdana; width:85%; border:2px solid #000; padding:5px; z-index:1000;  color:#000; } " +
			"#so_mContainer ul { padding-left:20px; } " +
			"#so_mContainer ul li { display:block; list-style-type:none; list-style-image:url(); line-height:2em; -moz-border-radius:.75em; font:10px verdana; padding:0; margin:2px; color:#000; } " +
			"#so_mContainer li:hover { background-color:#E3EBED; } " +
			"#so_mContainer ul li span { position:relative; width:15px; height:15px; margin-right:4px; } " +
			"#so_mContainer pre { background-color:#F9FAFB; border:1px solid #638DA1; height:auto; padding:5px; font:9px verdana; color:#000; } " +
			"#so_mContainer .topLevel { margin:0; padding:0; } " +
			"#so_mContainer .credits { float:left; width:200px; font:6.5pt verdana; color:#000; padding:2px; margin-left:5px; text-align:left; border-top:1px solid #000; margin-top:15px; width:75%; } " +
			"#so_mContainer .credits a { font:9px verdana; font-weight:bold; color:#004465; text-decoration:none; background-color:transparent; }"
};

//similar function to var_dump in PHP, brings up the javascript object tree UI.
function var_dump(obj)
{
	Prado.Inspector.inspect(obj);
}

//similar function to print_r for PHP
var print_r = inspect;

${this.title}

Code Editor : logger.js