gecko-dev/remote/Error.jsm

93 строки
2.2 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var EXPORTED_SYMBOLS = [
"FatalError",
"RemoteAgentError",
"UnknownMethodError",
"UnsupportedError",
];
const {Log} = ChromeUtils.import("chrome://remote/content/Log.jsm");
const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
const {XPCOMUtils} = ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyGetter(this, "log", Log.get);
class RemoteAgentError extends Error {
constructor(message = "", cause = undefined) {
cause = cause || message;
super(cause);
this.name = this.constructor.name;
this.message = message;
this.cause = cause;
this.notify();
}
notify() {
Cu.reportError(this);
log.error(formatError(this));
}
toString({stack = false} = {}) {
return RemoteAgentError.format(this, {stack});
}
static format(e, {stack = false} = {}) {
return formatError(e, {stack});
}
}
/**
* A fatal error that it is not possible to recover from
* or send back to the client.
*
* Constructing this error will force the application to quit.
*/
class FatalError extends RemoteAgentError {
constructor(...args) {
super(...args);
this.quit();
}
notify() {
log.fatal(this.toString());
}
toString() {
return formatError(this, {stack: true});
}
quit(mode = Ci.nsIAppStartup.eForceQuit) {
Services.startup.quit(mode);
}
}
/** When an operation is not yet implemented. */
class UnsupportedError extends RemoteAgentError {}
/** The requested remote method does not exist. */
class UnknownMethodError extends RemoteAgentError {}
function formatError(error, {stack = false} = {}) {
const ls = [];
ls.push(`${error.name}: ${error.message ? `${error.message}:` : ""}`);
if (stack && error.stack) {
const stack = error.stack.trim().split("\n");
ls.push(stack.map(line => `\t${line}`).join("\n"));
if (error.cause) {
ls.push("caused by: " + formatError(error.cause, {stack}));
}
}
return ls.join("\n");
}