summaryrefslogtreecommitdiff
path: root/plugins/org.apache.cordova.console/www/logger.js
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/org.apache.cordova.console/www/logger.js')
-rw-r--r--plugins/org.apache.cordova.console/www/logger.js355
1 files changed, 355 insertions, 0 deletions
diff --git a/plugins/org.apache.cordova.console/www/logger.js b/plugins/org.apache.cordova.console/www/logger.js
new file mode 100644
index 00000000..cbf81b9c
--- /dev/null
+++ b/plugins/org.apache.cordova.console/www/logger.js
@@ -0,0 +1,355 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+*/
+
+//------------------------------------------------------------------------------
+// The logger module exports the following properties/functions:
+//
+// LOG - constant for the level LOG
+// ERROR - constant for the level ERROR
+// WARN - constant for the level WARN
+// INFO - constant for the level INFO
+// DEBUG - constant for the level DEBUG
+// logLevel() - returns current log level
+// logLevel(value) - sets and returns a new log level
+// useConsole() - returns whether logger is using console
+// useConsole(value) - sets and returns whether logger is using console
+// log(message,...) - logs a message at level LOG
+// error(message,...) - logs a message at level ERROR
+// warn(message,...) - logs a message at level WARN
+// info(message,...) - logs a message at level INFO
+// debug(message,...) - logs a message at level DEBUG
+// logLevel(level,message,...) - logs a message specified level
+//
+//------------------------------------------------------------------------------
+
+var logger = exports;
+
+var exec = require('cordova/exec');
+var utils = require('cordova/utils');
+
+var UseConsole = false;
+var UseLogger = true;
+var Queued = [];
+var DeviceReady = false;
+var CurrentLevel;
+
+var originalConsole = console;
+
+/**
+ * Logging levels
+ */
+
+var Levels = [
+ "LOG",
+ "ERROR",
+ "WARN",
+ "INFO",
+ "DEBUG"
+];
+
+/*
+ * add the logging levels to the logger object and
+ * to a separate levelsMap object for testing
+ */
+
+var LevelsMap = {};
+for (var i=0; i<Levels.length; i++) {
+ var level = Levels[i];
+ LevelsMap[level] = i;
+ logger[level] = level;
+}
+
+CurrentLevel = LevelsMap.WARN;
+
+/**
+ * Getter/Setter for the logging level
+ *
+ * Returns the current logging level.
+ *
+ * When a value is passed, sets the logging level to that value.
+ * The values should be one of the following constants:
+ * logger.LOG
+ * logger.ERROR
+ * logger.WARN
+ * logger.INFO
+ * logger.DEBUG
+ *
+ * The value used determines which messages get printed. The logging
+ * values above are in order, and only messages logged at the logging
+ * level or above will actually be displayed to the user. E.g., the
+ * default level is WARN, so only messages logged with LOG, ERROR, or
+ * WARN will be displayed; INFO and DEBUG messages will be ignored.
+ */
+logger.level = function (value) {
+ if (arguments.length) {
+ if (LevelsMap[value] === null) {
+ throw new Error("invalid logging level: " + value);
+ }
+ CurrentLevel = LevelsMap[value];
+ }
+
+ return Levels[CurrentLevel];
+};
+
+/**
+ * Getter/Setter for the useConsole functionality
+ *
+ * When useConsole is true, the logger will log via the
+ * browser 'console' object.
+ */
+logger.useConsole = function (value) {
+ if (arguments.length) UseConsole = !!value;
+
+ if (UseConsole) {
+ if (typeof console == "undefined") {
+ throw new Error("global console object is not defined");
+ }
+
+ if (typeof console.log != "function") {
+ throw new Error("global console object does not have a log function");
+ }
+
+ if (typeof console.useLogger == "function") {
+ if (console.useLogger()) {
+ throw new Error("console and logger are too intertwingly");
+ }
+ }
+ }
+
+ return UseConsole;
+};
+
+/**
+ * Getter/Setter for the useLogger functionality
+ *
+ * When useLogger is true, the logger will log via the
+ * native Logger plugin.
+ */
+logger.useLogger = function (value) {
+ // Enforce boolean
+ if (arguments.length) UseLogger = !!value;
+ return UseLogger;
+};
+
+/**
+ * Logs a message at the LOG level.
+ *
+ * Parameters passed after message are used applied to
+ * the message with utils.format()
+ */
+logger.log = function(message) { logWithArgs("LOG", arguments); };
+
+/**
+ * Logs a message at the ERROR level.
+ *
+ * Parameters passed after message are used applied to
+ * the message with utils.format()
+ */
+logger.error = function(message) { logWithArgs("ERROR", arguments); };
+
+/**
+ * Logs a message at the WARN level.
+ *
+ * Parameters passed after message are used applied to
+ * the message with utils.format()
+ */
+logger.warn = function(message) { logWithArgs("WARN", arguments); };
+
+/**
+ * Logs a message at the INFO level.
+ *
+ * Parameters passed after message are used applied to
+ * the message with utils.format()
+ */
+logger.info = function(message) { logWithArgs("INFO", arguments); };
+
+/**
+ * Logs a message at the DEBUG level.
+ *
+ * Parameters passed after message are used applied to
+ * the message with utils.format()
+ */
+logger.debug = function(message) { logWithArgs("DEBUG", arguments); };
+
+// log at the specified level with args
+function logWithArgs(level, args) {
+ args = [level].concat([].slice.call(args));
+ logger.logLevel.apply(logger, args);
+}
+
+// return the correct formatString for an object
+function formatStringForMessage(message) {
+ return (typeof message === "string") ? "" : "%o";
+}
+
+/**
+ * Logs a message at the specified level.
+ *
+ * Parameters passed after message are used applied to
+ * the message with utils.format()
+ */
+logger.logLevel = function(level /* , ... */) {
+ // format the message with the parameters
+ var formatArgs = [].slice.call(arguments, 1);
+ var fmtString = formatStringForMessage(formatArgs[0]);
+ if (fmtString.length > 0){
+ formatArgs.unshift(fmtString); // add formatString
+ }
+
+ var message = logger.format.apply(logger.format, formatArgs);
+
+ if (LevelsMap[level] === null) {
+ throw new Error("invalid logging level: " + level);
+ }
+
+ if (LevelsMap[level] > CurrentLevel) return;
+
+ // queue the message if not yet at deviceready
+ if (!DeviceReady && !UseConsole) {
+ Queued.push([level, message]);
+ return;
+ }
+
+ // Log using the native logger if that is enabled
+ if (UseLogger) {
+ exec(null, null, "Console", "logLevel", [level, message]);
+ }
+
+ // Log using the console if that is enabled
+ if (UseConsole) {
+ // make sure console is not using logger
+ if (console.useLogger()) {
+ throw new Error("console and logger are too intertwingly");
+ }
+
+ // log to the console
+ switch (level) {
+ case logger.LOG: originalConsole.log(message); break;
+ case logger.ERROR: originalConsole.log("ERROR: " + message); break;
+ case logger.WARN: originalConsole.log("WARN: " + message); break;
+ case logger.INFO: originalConsole.log("INFO: " + message); break;
+ case logger.DEBUG: originalConsole.log("DEBUG: " + message); break;
+ }
+ }
+};
+
+
+/**
+ * Formats a string and arguments following it ala console.log()
+ *
+ * Any remaining arguments will be appended to the formatted string.
+ *
+ * for rationale, see FireBug's Console API:
+ * http://getfirebug.com/wiki/index.php/Console_API
+ */
+logger.format = function(formatString, args) {
+ return __format(arguments[0], [].slice.call(arguments,1)).join(' ');
+};
+
+
+//------------------------------------------------------------------------------
+/**
+ * Formats a string and arguments following it ala vsprintf()
+ *
+ * format chars:
+ * %j - format arg as JSON
+ * %o - format arg as JSON
+ * %c - format arg as ''
+ * %% - replace with '%'
+ * any other char following % will format it's
+ * arg via toString().
+ *
+ * Returns an array containing the formatted string and any remaining
+ * arguments.
+ */
+function __format(formatString, args) {
+ if (formatString === null || formatString === undefined) return [""];
+ if (arguments.length == 1) return [formatString.toString()];
+
+ if (typeof formatString != "string")
+ formatString = formatString.toString();
+
+ var pattern = /(.*?)%(.)(.*)/;
+ var rest = formatString;
+ var result = [];
+
+ while (args.length) {
+ var match = pattern.exec(rest);
+ if (!match) break;
+
+ var arg = args.shift();
+ rest = match[3];
+ result.push(match[1]);
+
+ if (match[2] == '%') {
+ result.push('%');
+ args.unshift(arg);
+ continue;
+ }
+
+ result.push(__formatted(arg, match[2]));
+ }
+
+ result.push(rest);
+
+ var remainingArgs = [].slice.call(args);
+ remainingArgs.unshift(result.join(''));
+ return remainingArgs;
+}
+
+function __formatted(object, formatChar) {
+
+ try {
+ switch(formatChar) {
+ case 'j':
+ case 'o': return JSON.stringify(object);
+ case 'c': return '';
+ }
+ }
+ catch (e) {
+ return "error JSON.stringify()ing argument: " + e;
+ }
+
+ if ((object === null) || (object === undefined)) {
+ return Object.prototype.toString.call(object);
+ }
+
+ return object.toString();
+}
+
+
+//------------------------------------------------------------------------------
+// when deviceready fires, log queued messages
+logger.__onDeviceReady = function() {
+ if (DeviceReady) return;
+
+ DeviceReady = true;
+
+ for (var i=0; i<Queued.length; i++) {
+ var messageArgs = Queued[i];
+ logger.logLevel(messageArgs[0], messageArgs[1]);
+ }
+
+ Queued = null;
+};
+
+// add a deviceready event to log queued messages
+document.addEventListener("deviceready", logger.__onDeviceReady, false);