66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* The performanceEntries actor emits events corresponding to performance
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* entries. It receives `performanceentry` events containing the performance
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* entry details and emits an event containing the name, type, origin, and
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* epoch of the performance entry.
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*/
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const { Actor, ActorClassWithSpec } = require("devtools/shared/protocol");
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const performanceSpec = require("devtools/shared/specs/performance-entries");
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const events = require("sdk/event/core");
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var PerformanceEntriesActor = ActorClassWithSpec(performanceSpec, {
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listenerAdded: false,
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initialize: function (conn, tabActor) {
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Actor.prototype.initialize.call(this, conn);
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this.window = tabActor.window;
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},
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/**
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* Start tracking the user timings.
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*/
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start: function () {
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if (!this.listenerAdded) {
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this.onPerformanceEntry = this.onPerformanceEntry.bind(this);
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this.window.addEventListener("performanceentry", this.onPerformanceEntry, true);
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this.listenerAdded = true;
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}
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},
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/**
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* Stop tracking the user timings.
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*/
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stop: function () {
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if (this.listenerAdded) {
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this.window.removeEventListener("performanceentry", this.onPerformanceEntry, true);
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this.listenerAdded = false;
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}
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},
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disconnect: function () {
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this.destroy();
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},
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destroy: function () {
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this.stop();
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Actor.prototype.destroy.call(this);
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},
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onPerformanceEntry: function (e) {
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let emitDetail = {
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type: e.entryType,
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name: e.name,
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origin: e.origin,
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epoch: e.epoch
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};
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events.emit(this, "entry", emitDetail);
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}
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});
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exports.PerformanceEntriesActor = PerformanceEntriesActor;
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