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91 lines
2.9 KiB
JavaScript
91 lines
2.9 KiB
JavaScript
/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
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/* 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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"use strict";
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const { Cc, Ci, Cu, Cr } = require("chrome");
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const { Task } = require("resource://gre/modules/Task.jsm");
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loader.lazyRequireGetter(this, "promise");
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loader.lazyRequireGetter(this, "EventEmitter",
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"devtools/toolkit/event-emitter");
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loader.lazyRequireGetter(this, "PerformanceFront",
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"devtools/performance/front", true);
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function PerformancePanel(iframeWindow, toolbox) {
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this.panelWin = iframeWindow;
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this._toolbox = toolbox;
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EventEmitter.decorate(this);
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}
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exports.PerformancePanel = PerformancePanel;
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PerformancePanel.prototype = {
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/**
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* Open is effectively an asynchronous constructor.
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*
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* @return object
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* A promise that is resolved when the Performance tool
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* completes opening.
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*/
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open: Task.async(function*() {
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this.panelWin.gToolbox = this._toolbox;
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this.panelWin.gTarget = this.target;
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this._onRecordingStartOrStop = this._onRecordingStartOrStop.bind(this);
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// Actor is already created in the toolbox; reuse
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// the same front, and the toolbox will also initialize the front,
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// but redo it here so we can hook into the same event to prevent race conditions
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// in the case of the front still being in the process of opening.
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let front = yield this.panelWin.gToolbox.initPerformance();
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// This should only happen if this is completely unsupported (when profiler
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// does not exist), and in that case, the tool shouldn't be available,
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// so let's ensure this assertion.
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if (!front) {
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Cu.reportError("No PerformanceFront found in toolbox.");
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}
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this.panelWin.gFront = front;
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this.panelWin.gFront.on("recording-started", this._onRecordingStartOrStop);
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this.panelWin.gFront.on("recording-stopped", this._onRecordingStartOrStop);
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yield this.panelWin.startupPerformance();
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this.isReady = true;
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this.emit("ready");
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return this;
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}),
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// DevToolPanel API
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get target() {
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return this._toolbox.target;
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},
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destroy: Task.async(function*() {
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// Make sure this panel is not already destroyed.
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if (this._destroyed) {
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return;
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}
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this.panelWin.gFront.off("recording-started", this._onRecordingStartOrStop);
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this.panelWin.gFront.off("recording-stopped", this._onRecordingStartOrStop);
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yield this.panelWin.shutdownPerformance();
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this.emit("destroyed");
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this._destroyed = true;
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}),
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_onRecordingStartOrStop: function () {
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let front = this.panelWin.gFront;
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if (front.isRecording()) {
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this._toolbox.highlightTool("performance");
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} else {
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this._toolbox.unhighlightTool("performance");
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}
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}
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};
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