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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/. */
/**
* The performanceEntries actor emits events corresponding to performance
* entries. It receives `performanceentry` events containing the performance
* entry details and emits an event containing the name, type, origin, and
* epoch of the performance entry.
*/
const { Actor, ActorClassWithSpec } = require("devtools/shared/protocol");
const performanceSpec = require("devtools/shared/specs/performance-entries");
const events = require("sdk/event/core");
var PerformanceEntriesActor = ActorClassWithSpec(performanceSpec, {
listenerAdded: false,
initialize: function (conn, tabActor) {
Actor.prototype.initialize.call(this, conn);
this.window = tabActor.window;
},
/**
* Start tracking the user timings.
*/
start: function () {
if (!this.listenerAdded) {
this.onPerformanceEntry = this.onPerformanceEntry.bind(this);
this.window.addEventListener("performanceentry", this.onPerformanceEntry, true);
this.listenerAdded = true;
}
},
/**
* Stop tracking the user timings.
*/
stop: function () {
if (this.listenerAdded) {
this.window.removeEventListener("performanceentry", this.onPerformanceEntry, true);
this.listenerAdded = false;
}
},
disconnect: function () {
this.destroy();
},
destroy: function () {
this.stop();
Actor.prototype.destroy.call(this);
},
onPerformanceEntry: function (e) {
let emitDetail = {
type: e.entryType,
name: e.name,
origin: e.origin,
epoch: e.epoch
};
events.emit(this, "entry", emitDetail);
}
});
exports.PerformanceEntriesActor = PerformanceEntriesActor;
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