mochikit_v14/MochiKit/Logging.js

   1 /***
   2
   3 MochiKit.Logging 1.4
   4
   5 See <http://mochikit.com/> for documentation, downloads, license, etc.
   6
   7 (c) 2005 Bob Ippolito.  All rights Reserved.
   8
   9 ***/
  10
  11 if (typeof(dojo) != 'undefined') {
  12     dojo.provide('MochiKit.Logging');
  13     dojo.require('MochiKit.Base');
  14 }
  15
  16 if (typeof(JSAN) != 'undefined') {
  17     JSAN.use("MochiKit.Base", []);
  18 }
  19
  20 try {
  21     if (typeof(MochiKit.Base) == 'undefined') {
  22         throw "";
  23     }
  24 } catch (e) {
  25     throw "MochiKit.Logging depends on MochiKit.Base!";
  26 }
  27
  28 if (typeof(MochiKit.Logging) == 'undefined') {
  29     MochiKit.Logging = {};
  30 }
  31
  32 MochiKit.Logging.NAME = "MochiKit.Logging";
  33 MochiKit.Logging.VERSION = "1.4";
  34 MochiKit.Logging.__repr__ = function () {
  35     return "[" + this.NAME + " " + this.VERSION + "]";
  36 };
  37
  38 MochiKit.Logging.toString = function () {
  39     return this.__repr__();
  40 };
  41
  42
  43 MochiKit.Logging.EXPORT = [
  44     "LogLevel",
  45     "LogMessage",
  46     "Logger",
  47     "alertListener",
  48     "logger",
  49     "log",
  50     "logError",
  51     "logDebug",
  52     "logFatal",
  53     "logWarning"
  54 ];
  55
  56
  57 MochiKit.Logging.EXPORT_OK = [
  58     "logLevelAtLeast",
  59     "isLogMessage",
  60     "compareLogMessage"
  61 ];
  62
  63
  64 /** @id MochiKit.Logging.LogMessage */
  65 MochiKit.Logging.LogMessage = function (num, level, info) {
  66     this.num = num;
  67     this.level = level;
  68     this.info = info;
  69     this.timestamp = new Date();
  70 };
  71
  72 MochiKit.Logging.LogMessage.prototype = {
  73      /** @id MochiKit.Logging.LogMessage.prototype.repr */
  74     repr: function () {
  75         var m = MochiKit.Base;
  76         return 'LogMessage(' +
  77             m.map(
  78                 m.repr,
  79                 [this.num, this.level, this.info]
  80             ).join(', ') + ')';
  81     },
  82     /** @id MochiKit.Logging.LogMessage.prototype.toString */
  83     toString: MochiKit.Base.forwardCall("repr")
  84 };
  85
  86 MochiKit.Base.update(MochiKit.Logging, {
  87     /** @id MochiKit.Logging.logLevelAtLeast */
  88     logLevelAtLeast: function (minLevel) {
  89         var self = MochiKit.Logging;
  90         if (typeof(minLevel) == 'string') {
  91             minLevel = self.LogLevel[minLevel];
  92         }
  93         return function (msg) {
  94             var msgLevel = msg.level;
  95             if (typeof(msgLevel) == 'string') {
  96                 msgLevel = self.LogLevel[msgLevel];
  97             }
  98             return msgLevel >= minLevel;
  99         };
 100     },
 101
 102     /** @id MochiKit.Logging.isLogMessage */
 103     isLogMessage: function (/* ... */) {
 104         var LogMessage = MochiKit.Logging.LogMessage;
 105         for (var i = 0; i < arguments.length; i++) {
 106             if (!(arguments[i] instanceof LogMessage)) {
 107                 return false;
 108             }
 109         }
 110         return true;
 111     },
 112
 113     /** @id MochiKit.Logging.compareLogMessage */
 114     compareLogMessage: function (a, b) {
 115         return MochiKit.Base.compare([a.level, a.info], [b.level, b.info]);
 116     },
 117
 118     /** @id MochiKit.Logging.alertListener */
 119     alertListener: function (msg) {
 120         alert(
 121             "num: " + msg.num +
 122             "\nlevel: " +  msg.level +
 123             "\ninfo: " + msg.info.join(" ")
 124         );
 125     }
 126
 127 });
 128
 129 /** @id MochiKit.Logging.Logger */
 130 MochiKit.Logging.Logger = function (/* optional */maxSize) {
 131     this.counter = 0;
 132     if (typeof(maxSize) == 'undefined' || maxSize === null) {
 133         maxSize = -1;
 134     }
 135     this.maxSize = maxSize;
 136     this._messages = [];
 137     this.listeners = {};
 138     this.useNativeConsole = false;
 139 };
 140
 141 MochiKit.Logging.Logger.prototype = {
 142     /** @id MochiKit.Logging.Logger.prototype.clear */
 143     clear: function () {
 144         this._messages.splice(0, this._messages.length);
 145     },
 146
 147     /** @id MochiKit.Logging.Logger.prototype.logToConsole */
 148     logToConsole: function (msg) {
 149         if (typeof(window) != "undefined" && window.console
 150                 && window.console.log) {
 151             // Safari and FireBug 0.4
 152             // Percent replacement is a workaround for cute Safari crashing bug
 153             window.console.log(msg.replace(/%/g, '\uFF05'));
 154         } else if (typeof(opera) != "undefined" && opera.postError) {
 155             // Opera
 156             opera.postError(msg);
 157         } else if (typeof(printfire) == "function") {
 158             // FireBug 0.3 and earlier
 159             printfire(msg);
 160         } else if (typeof(Debug) != "undefined" && Debug.writeln) {
 161             // IE Web Development Helper (?)
 162             // http://www.nikhilk.net/Entry.aspx?id=93
 163             Debug.writeln(msg);
 164         } else if (typeof(debug) != "undefined" && debug.trace) {
 165             // Atlas framework (?)
 166             // http://www.nikhilk.net/Entry.aspx?id=93
 167             debug.trace(msg);
 168         }
 169     },
 170
 171     /** @id MochiKit.Logging.Logger.prototype.dispatchListeners */
 172     dispatchListeners: function (msg) {
 173         for (var k in this.listeners) {
 174             var pair = this.listeners[k];
 175             if (pair.ident != k || (pair[0] && !pair[0](msg))) {
 176                 continue;
 177             }
 178             pair[1](msg);
 179         }
 180     },
 181
 182     /** @id MochiKit.Logging.Logger.prototype.addListener */
 183     addListener: function (ident, filter, listener) {
 184         if (typeof(filter) == 'string') {
 185             filter = MochiKit.Logging.logLevelAtLeast(filter);
 186         }
 187         var entry = [filter, listener];
 188         entry.ident = ident;
 189         this.listeners[ident] = entry;
 190     },
 191
 192     /** @id MochiKit.Logging.Logger.prototype.removeListener */
 193     removeListener: function (ident) {
 194         delete this.listeners[ident];
 195     },
 196
 197     /** @id MochiKit.Logging.Logger.prototype.baseLog */
 198     baseLog: function (level, message/*, ...*/) {
 199         var msg = new MochiKit.Logging.LogMessage(
 200             this.counter,
 201             level,
 202             MochiKit.Base.extend(null, arguments, 1)
 203         );
 204         this._messages.push(msg);
 205         this.dispatchListeners(msg);
 206         if (this.useNativeConsole) {
 207             this.logToConsole(msg.level + ": " + msg.info.join(" "));
 208         }
 209         this.counter += 1;
 210         while (this.maxSize >= 0 && this._messages.length > this.maxSize) {
 211             this._messages.shift();
 212         }
 213     },
 214
 215     /** @id MochiKit.Logging.Logger.prototype.getMessages */
 216     getMessages: function (howMany) {
 217         var firstMsg = 0;
 218         if (!(typeof(howMany) == 'undefined' || howMany === null)) {
 219             firstMsg = Math.max(0, this._messages.length - howMany);
 220         }
 221         return this._messages.slice(firstMsg);
 222     },
 223
 224     /** @id MochiKit.Logging.Logger.prototype.getMessageText */
 225     getMessageText: function (howMany) {
 226         if (typeof(howMany) == 'undefined' || howMany === null) {
 227             howMany = 30;
 228         }
 229         var messages = this.getMessages(howMany);
 230         if (messages.length) {
 231             var lst = map(function (m) {
 232                 return '\n  [' + m.num + '] ' + m.level + ': ' + m.info.join(' ');
 233             }, messages);
 234             lst.unshift('LAST ' + messages.length + ' MESSAGES:');
 235             return lst.join('');
 236         }
 237         return '';
 238     },
 239
 240     /** @id MochiKit.Logging.Logger.prototype.debuggingBookmarklet */
 241     debuggingBookmarklet: function (inline) {
 242         if (typeof(MochiKit.LoggingPane) == "undefined") {
 243             alert(this.getMessageText());
 244         } else {
 245             MochiKit.LoggingPane.createLoggingPane(inline || false);
 246         }
 247     }
 248 };
 249
 250 MochiKit.Logging.__new__ = function () {
 251     this.LogLevel = {
 252         ERROR: 40,
 253         FATAL: 50,
 254         WARNING: 30,
 255         INFO: 20,
 256         DEBUG: 10
 257     };
 258
 259     var m = MochiKit.Base;
 260     m.registerComparator("LogMessage",
 261         this.isLogMessage,
 262         this.compareLogMessage
 263     );
 264
 265     var partial = m.partial;
 266
 267     var Logger = this.Logger;
 268     var baseLog = Logger.prototype.baseLog;
 269     m.update(this.Logger.prototype, {
 270         debug: partial(baseLog, 'DEBUG'),
 271         log: partial(baseLog, 'INFO'),
 272         error: partial(baseLog, 'ERROR'),
 273         fatal: partial(baseLog, 'FATAL'),
 274         warning: partial(baseLog, 'WARNING')
 275     });
 276
 277     // indirectly find logger so it can be replaced
 278     var self = this;
 279     var connectLog = function (name) {
 280         return function () {
 281             self.logger[name].apply(self.logger, arguments);
 282         };
 283     };
 284
 285     /** @id MochiKit.Logging.log */
 286     this.log = connectLog('log');
 287     /** @id MochiKit.Logging.logError */
 288     this.logError = connectLog('error');
 289     /** @id MochiKit.Logging.logDebug */
 290     this.logDebug = connectLog('debug');
 291     /** @id MochiKit.Logging.logFatal */
 292     this.logFatal = connectLog('fatal');
 293     /** @id MochiKit.Logging.logWarning */
 294     this.logWarning = connectLog('warning');
 295     this.logger = new Logger();
 296     this.logger.useNativeConsole = true;
 297
 298     this.EXPORT_TAGS = {
 299         ":common": this.EXPORT,
 300         ":all": m.concat(this.EXPORT, this.EXPORT_OK)
 301     };
 302
 303     m.nameFunctions(this);
 304
 305 };
 306
 307 if (typeof(printfire) == "undefined" &&
 308         typeof(document) != "undefined" && document.createEvent &&
 309         typeof(dispatchEvent) != "undefined") {
 310     // FireBug really should be less lame about this global function
 311     printfire  = function () {
 312         printfire.args = arguments;
 313         var ev = document.createEvent("Events");
 314         ev.initEvent("printfire", false, true);
 315         dispatchEvent(ev);
 316     };
 317 }
 318
 319 MochiKit.Logging.__new__();
 320
 321 MochiKit.Base._exportSymbols(this, MochiKit.Logging);