--- /dev/null
+/**
+ * @class Ext.Error
+ * @private
+ * @extends Error
+
+A wrapper class for the native JavaScript Error object that adds a few useful capabilities for handling
+errors in an Ext application. When you use Ext.Error to {@link #raise} an error from within any class that
+uses the Ext 4 class system, the Error class can automatically add the source class and method from which
+the error was raised. It also includes logic to automatically log the eroor to the console, if available,
+with additional metadata about the error. In all cases, the error will always be thrown at the end so that
+execution will halt.
+
+Ext.Error also offers a global error {@link #handle handling} method that can be overridden in order to
+handle application-wide errors in a single spot. You can optionally {@link #ignore} errors altogether,
+although in a real application it's usually a better idea to override the handling function and perform
+logging or some other method of reporting the errors in a way that is meaningful to the application.
+
+At its simplest you can simply raise an error as a simple string from within any code:
+
+#Example usage:#
+
+ Ext.Error.raise('Something bad happened!');
+
+If raised from plain JavaScript code, the error will be logged to the console (if available) and the message
+displayed. In most cases however you'll be raising errors from within a class, and it may often be useful to add
+additional metadata about the error being raised. The {@link #raise} method can also take a config object.
+In this form the `msg` attribute becomes the error description, and any other data added to the config gets
+added to the error object and, if the console is available, logged to the console for inspection.
+
+#Example usage:#
+
+ Ext.define('Ext.Foo', {
+ doSomething: function(option){
+ if (someCondition === false) {
+ Ext.Error.raise({
+ msg: 'You cannot do that!',
+ option: option, // whatever was passed into the method
+ 'error code': 100 // other arbitrary info
+ });
+ }
+ }
+ });
+
+If a console is available (that supports the `console.dir` function) you'll see console output like:
+
+ An error was raised with the following data:
+ option: Object { foo: "bar"}
+ foo: "bar"
+ error code: 100
+ msg: "You cannot do that!"
+ sourceClass: "Ext.Foo"
+ sourceMethod: "doSomething"
+
+ uncaught exception: You cannot do that!
+
+As you can see, the error will report exactly where it was raised and will include as much information as the
+raising code can usefully provide.
+
+If you want to handle all application errors globally you can simply override the static {@link handle} method
+and provide whatever handling logic you need. If the method returns true then the error is considered handled
+and will not be thrown to the browser. If anything but true is returned then the error will be thrown normally.
+
+#Example usage:#
+
+ Ext.Error.handle = function(err) {
+ if (err.someProperty == 'NotReallyAnError') {
+ // maybe log something to the application here if applicable
+ return true;
+ }
+ // any non-true return value (including none) will cause the error to be thrown
+ }
+
+ * Create a new Error object
+ * @param {Object} config The config object
+ * @markdown
+ * @author Brian Moeskau <brian@sencha.com>
+ * @docauthor Brian Moeskau <brian@sencha.com>
+ */
+Ext.Error = Ext.extend(Error, {
+ statics: {
+ /**
+ * @property ignore
+Static flag that can be used to globally disable error reporting to the browser if set to true
+(defaults to false). Note that if you ignore Ext errors it's likely that some other code may fail
+and throw a native JavaScript error thereafter, so use with caution. In most cases it will probably
+be preferable to supply a custom error {@link #handle handling} function instead.
+
+#Example usage:#
+
+ Ext.Error.ignore = true;
+
+ * @markdown
+ * @static
+ */
+ ignore: false,
+
+ /**
+Raise an error that can include additional data and supports automatic console logging if available.
+You can pass a string error message or an object with the `msg` attribute which will be used as the
+error message. The object can contain any other name-value attributes (or objects) to be logged
+along with the error.
+
+Note that after displaying the error message a JavaScript error will ultimately be thrown so that
+execution will halt.
+
+#Example usage:#
+
+ Ext.Error.raise('A simple string error message');
+
+ // or...
+
+ Ext.define('Ext.Foo', {
+ doSomething: function(option){
+ if (someCondition === false) {
+ Ext.Error.raise({
+ msg: 'You cannot do that!',
+ option: option, // whatever was passed into the method
+ 'error code': 100 // other arbitrary info
+ });
+ }
+ }
+ });
+ * @param {String/Object} err The error message string, or an object containing the
+ * attribute "msg" that will be used as the error message. Any other data included in
+ * the object will also be logged to the browser console, if available.
+ * @static
+ * @markdown
+ */
+ raise: function(err){
+ err = err || {};
+ if (Ext.isString(err)) {
+ err = { msg: err };
+ }
+
+ var method = this.raise.caller;
+
+ if (method) {
+ if (method.$name) {
+ err.sourceMethod = method.$name;
+ }
+ if (method.$owner) {
+ err.sourceClass = method.$owner.$className;
+ }
+ }
+
+ if (Ext.Error.handle(err) !== true) {
+ var global = Ext.global,
+ con = global.console,
+ msg = Ext.Error.prototype.toString.call(err),
+ noConsoleMsg = 'An uncaught error was raised: "' + msg +
+ '". Use Firebug or Webkit console for additional details.';
+
+ if (con) {
+ if (con.dir) {
+ con.warn('An uncaught error was raised with the following data:');
+ con.dir(err);
+ }
+ else {
+ con.warn(noConsoleMsg);
+ }
+ if (con.error) {
+ con.error(msg);
+ }
+ }
+ else if (global.alert){
+ global.alert(noConsoleMsg);
+ }
+
+ throw new Ext.Error(err);
+ }
+ },
+
+ /**
+Globally handle any Ext errors that may be raised, optionally providing custom logic to
+handle different errors individually. Return true from the function to bypass throwing the
+error to the browser, otherwise the error will be thrown and execution will halt.
+
+#Example usage:#
+
+ Ext.Error.handle = function(err) {
+ if (err.someProperty == 'NotReallyAnError') {
+ // maybe log something to the application here if applicable
+ return true;
+ }
+ // any non-true return value (including none) will cause the error to be thrown
+ }
+
+ * @param {Ext.Error} err The Ext.Error object being raised. It will contain any attributes
+ * that were originally raised with it, plus properties about the method and class from which
+ * the error originated (if raised from a class that uses the Ext 4 class system).
+ * @static
+ * @markdown
+ */
+ handle: function(){
+ return Ext.Error.ignore;
+ }
+ },
+
+ /**
+ * @constructor
+ * @param {String/Object} config The error message string, or an object containing the
+ * attribute "msg" that will be used as the error message. Any other data included in
+ * the object will be applied to the error instance and logged to the browser console, if available.
+ */
+ constructor: function(config){
+ if (Ext.isString(config)) {
+ config = { msg: config };
+ }
+ Ext.apply(this, config);
+ },
+
+ /**
+Provides a custom string representation of the error object. This is an override of the base JavaScript
+`Object.toString` method, which is useful so that when logged to the browser console, an error object will
+be displayed with a useful message instead of `[object Object]`, the default `toString` result.
+
+The default implementation will include the error message along with the raising class and method, if available,
+but this can be overridden with a custom implementation either at the prototype level (for all errors) or on
+a particular error instance, if you want to provide a custom description that will show up in the console.
+ * @markdown
+ * @return {String} The error message. If raised from within the Ext 4 class system, the error message
+ * will also include the raising class and method names, if available.
+ */
+ toString: function(){
+ var me = this,
+ className = me.className ? me.className : '',
+ methodName = me.methodName ? '.' + me.methodName + '(): ' : '',
+ msg = me.msg || '(No description provided)';
+
+ return className + methodName + msg;
+ }
+});
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