1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/browser/components/tabview/telemetry.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,63 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/**
1.9 + * Collects telemetry data for Tabview.
1.10 + */
1.11 +let Telemetry = {
1.12 + TOPIC_GATHER_TELEMETRY: "gather-telemetry",
1.13 +
1.14 + /**
1.15 + * Initializes the object.
1.16 + */
1.17 + init: function Telemetry_init() {
1.18 + Services.obs.addObserver(this, this.TOPIC_GATHER_TELEMETRY, false);
1.19 + },
1.20 +
1.21 + /**
1.22 + * Uninitializes the object.
1.23 + */
1.24 + uninit: function Telemetry_uninit() {
1.25 + Services.obs.removeObserver(this, this.TOPIC_GATHER_TELEMETRY);
1.26 + },
1.27 +
1.28 + /**
1.29 + * Adds telemetry values to gather usage statistics.
1.30 + */
1.31 + _collect: function Telemetry_collect() {
1.32 + let stackedGroupsCount = 0;
1.33 + let childCounts = [];
1.34 +
1.35 + GroupItems.groupItems.forEach(function (groupItem) {
1.36 + if (!groupItem.isEmpty()) {
1.37 + childCounts.push(groupItem.getChildren().length);
1.38 +
1.39 + if (groupItem.isStacked())
1.40 + stackedGroupsCount++;
1.41 + }
1.42 + });
1.43 +
1.44 + function addTelemetryValue(aId, aValue) {
1.45 + Services.telemetry.getHistogramById("PANORAMA_" + aId).add(aValue);
1.46 + }
1.47 + function median(aChildCounts) {
1.48 + aChildCounts.sort(function(x, y) { return x - y; });
1.49 + let middle = Math.floor(aChildCounts.length / 2);
1.50 + return aChildCounts[middle];
1.51 + }
1.52 +
1.53 + addTelemetryValue("GROUPS_COUNT", GroupItems.groupItems.length);
1.54 + addTelemetryValue("STACKED_GROUPS_COUNT", stackedGroupsCount);
1.55 + addTelemetryValue("MEDIAN_TABS_IN_GROUPS_COUNT", median(childCounts));
1.56 + },
1.57 +
1.58 + /**
1.59 + * Observes for gather telemetry topic.
1.60 + */
1.61 + observe: function Telemetry_observe(aSubject, aTopic, aData) {
1.62 + if (!gWindow.PrivateBrowsingUtils.isWindowPrivate(gWindow))
1.63 + this._collect();
1.64 + }
1.65 +}
1.66 +
