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/* 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 Cu = Components.utils;
var Ci = Components.interfaces;
var Cc = Components.classes;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
// This constant tells how many messages to process in a single timer execution.
const MESSAGES_IN_INTERVAL = 1500
const STORAGE_MAX_EVENTS = 1000;
var _consoleStorage = new Map();
const CONSOLEAPISTORAGE_CID = Components.ID('{96cf7855-dfa9-4c6d-8276-f9705b4890f2}');
/**
* The ConsoleAPIStorage is meant to cache window.console API calls for later
* reuse by other components when needed. For example, the Web Console code can
* display the cached messages when it opens for the active tab.
*
* ConsoleAPI messages are stored as they come from the ConsoleAPI code, with
* all their properties. They are kept around until the inner window object that
* created the messages is destroyed. Messages are indexed by the inner window
* ID.
*
* Usage:
* Cu.import("resource://gre/modules/ConsoleAPIStorage.jsm");
*
* // Get the cached events array for the window you want (use the inner
* // window ID).
* let events = ConsoleAPIStorage.getEvents(innerWindowID);
* events.forEach(function(event) { ... });
*
* // Clear the events for the given inner window ID.
* ConsoleAPIStorage.clearEvents(innerWindowID);
*/
function ConsoleAPIStorageService() {
this.init();
}
ConsoleAPIStorageService.prototype = {
classID : CONSOLEAPISTORAGE_CID,
QueryInterface: XPCOMUtils.generateQI([Ci.nsIConsoleAPIStorage,
Ci.nsIObserver]),
classInfo: XPCOMUtils.generateCI({
classID: CONSOLEAPISTORAGE_CID,
contractID: '@mozilla.org/consoleAPI-storage;1',
interfaces: [Ci.nsIConsoleAPIStorage, Ci.nsIObserver],
flags: Ci.nsIClassInfo.SINGLETON
}),
observe: function CS_observe(aSubject, aTopic, aData)
{
if (aTopic == "xpcom-shutdown") {
Services.obs.removeObserver(this, "xpcom-shutdown");
Services.obs.removeObserver(this, "inner-window-destroyed");
Services.obs.removeObserver(this, "memory-pressure");
}
else if (aTopic == "inner-window-destroyed") {
let innerWindowID = aSubject.QueryInterface(Ci.nsISupportsPRUint64).data;
this.clearEvents(innerWindowID + "");
}
else if (aTopic == "memory-pressure") {
this.clearEvents();
}
},
/** @private */
init: function CS_init()
{
Services.obs.addObserver(this, "xpcom-shutdown", false);
Services.obs.addObserver(this, "inner-window-destroyed", false);
Services.obs.addObserver(this, "memory-pressure", false);
},
/**
* Get the events array by inner window ID or all events from all windows.
*
* @param string [aId]
* Optional, the inner window ID for which you want to get the array of
* cached events.
* @returns array
* The array of cached events for the given window. If no |aId| is
* given this function returns all of the cached events, from any
* window.
*/
getEvents: function CS_getEvents(aId)
{
if (aId != null) {
return (_consoleStorage.get(aId) || []).slice(0);
}
let result = [];
for (let [id, events] of _consoleStorage) {
result.push.apply(result, events);
}
return result.sort(function(a, b) {
return a.timeStamp - b.timeStamp;
});
},
/**
* Record an event associated with the given window ID.
*
* @param string aId
* The ID of the inner window for which the event occurred or "jsm" for
* messages logged from JavaScript modules..
* @param string aOuterId
* This ID is used as 3rd parameters for the console-api-log-event
* notification.
* @param object aEvent
* A JavaScript object you want to store.
*/
recordEvent: function CS_recordEvent(aId, aOuterId, aEvent)
{
if (!_consoleStorage.has(aId)) {
_consoleStorage.set(aId, []);
}
let storage = _consoleStorage.get(aId);
storage.push(aEvent);
// truncate
if (storage.length > STORAGE_MAX_EVENTS) {
storage.shift();
}
Services.obs.notifyObservers(aEvent, "console-api-log-event", aOuterId);
Services.obs.notifyObservers(aEvent, "console-storage-cache-event", aId);
},
/**
* Clear storage data for the given window.
*
* @param string [aId]
* Optional, the inner window ID for which you want to clear the
* messages. If this is not specified all of the cached messages are
* cleared, from all window objects.
*/
clearEvents: function CS_clearEvents(aId)
{
if (aId != null) {
_consoleStorage.delete(aId);
}
else {
_consoleStorage.clear();
Services.obs.notifyObservers(null, "console-storage-reset", null);
}
},
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([ConsoleAPIStorageService]);
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