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ConsoleAPI.js
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ConsoleAPI.js
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Console API code.
*
* The Initial Developer of the Original Code is Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* David Dahl <ddahl@mozilla.com> (Original Author)
* Ryan Flint <rflint@mozilla.com>
* Rob Campbell <rcampbell@mozilla.com>
* Mihai Sucan <mihai.sucan@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
let Cu = Components.utils;
let Ci = Components.interfaces;
let Cc = Components.classes;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
function ConsoleAPI() {}
ConsoleAPI.prototype = {
classID: Components.ID("{b49c18f8-3379-4fc0-8c90-d7772c1a9ff3}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGlobalPropertyInitializer]),
// nsIDOMGlobalPropertyInitializer
init: function CA_init(aWindow) {
let id;
try {
id = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.outerWindowID;
} catch (ex) {
Cu.reportError(ex);
}
let self = this;
let chromeObject = {
// window.console API
log: function CA_log() {
self.notifyObservers(id, "log", arguments);
},
info: function CA_info() {
self.notifyObservers(id, "info", arguments);
},
warn: function CA_warn() {
self.notifyObservers(id, "warn", arguments);
},
error: function CA_error() {
self.notifyObservers(id, "error", arguments);
},
debug: function CA_debug() {
self.notifyObservers(id, "log", arguments);
},
trace: function CA_trace() {
self.notifyObservers(id, "trace", self.getStackTrace());
},
// Displays an interactive listing of all the properties of an object.
dir: function CA_dir() {
self.notifyObservers(id, "dir", arguments);
},
__exposedProps__: {
log: "r",
info: "r",
warn: "r",
error: "r",
debug: "r",
trace: "r",
dir: "r"
}
};
// We need to return an actual content object here, instead of a wrapped
// chrome object. This allows things like console.log.bind() to work.
let contentObj = Cu.createObjectIn(aWindow);
function genPropDesc(fun) {
return { enumerable: true, configurable: true, writable: true,
value: chromeObject[fun].bind(chromeObject) };
}
const properties = {
log: genPropDesc('log'),
info: genPropDesc('info'),
warn: genPropDesc('warn'),
error: genPropDesc('error'),
debug: genPropDesc('debug'),
trace: genPropDesc('trace'),
dir: genPropDesc('dir'),
__noSuchMethod__: { enumerable: true, configurable: true, writable: true,
value: function() {} },
__mozillaConsole__: { value: true }
};
Object.defineProperties(contentObj, properties);
Cu.makeObjectPropsNormal(contentObj);
return contentObj;
},
/**
* Notify all observers of any console API call
**/
notifyObservers: function CA_notifyObservers(aID, aLevel, aArguments) {
if (!aID)
return;
let stack = this.getStackTrace();
// Skip the first frame since it contains an internal call.
let frame = stack[1];
let consoleEvent = {
ID: aID,
level: aLevel,
filename: frame.filename,
lineNumber: frame.lineNumber,
functionName: frame.functionName,
arguments: aArguments
};
consoleEvent.wrappedJSObject = consoleEvent;
Services.obs.notifyObservers(consoleEvent,
"console-api-log-event", aID);
},
/**
* Build the stacktrace array for the console.trace() call.
*
* @return array
* Each element is a stack frame that holds the following properties:
* filename, lineNumber, functionName and language.
**/
getStackTrace: function CA_getStackTrace() {
let stack = [];
let frame = Components.stack.caller;
while (frame = frame.caller) {
if (frame.language == Ci.nsIProgrammingLanguage.JAVASCRIPT ||
frame.language == Ci.nsIProgrammingLanguage.JAVASCRIPT2) {
stack.push({
filename: frame.filename,
lineNumber: frame.lineNumber,
functionName: frame.name,
language: frame.language,
});
}
}
return stack;
}
};
let NSGetFactory = XPCOMUtils.generateNSGetFactory([ConsoleAPI]);