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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/. */
// @ts-check
"use strict";
/**
* This file contains the PerformancePanel, which uses a common API for DevTools to
* start and load everything. This will call `gInit` from the initializer.js file,
* which does the important initialization for the panel. This code is more concerned
* with wiring this panel into the rest of DevTools and fetching the Actor's fronts.
*/
/**
* @typedef {import("../@types/perf").PanelWindow} PanelWindow
* @typedef {import("../@types/perf").Toolbox} Toolbox
* @typedef {import("../@types/perf").Target} Target
* @typedef {import("../@types/perf").Commands} Commands
*/
class PerformancePanel {
/**
* @param {PanelWindow} iframeWindow
* @param {Toolbox} toolbox
* @param {Commands} commands
*/
constructor(iframeWindow, toolbox, commands) {
this.panelWin = iframeWindow;
this.toolbox = toolbox;
this.commands = commands;
const EventEmitter = require("resource://devtools/shared/event-emitter.js");
EventEmitter.decorate(this);
}
/**
* This is implemented (and overwritten) by the EventEmitter. Is there a way
* to use mixins with JSDoc?
*
* @param {string} _eventName
*/
emit(_eventName) {}
/**
* Open is effectively an asynchronous constructor.
* @return {Promise<PerformancePanel>} Resolves when the Perf tool completes
* opening.
*/
open() {
if (!this._opening) {
this._opening = this._doOpen();
}
return this._opening;
}
/**
* This function is the actual implementation of the open() method.
* @returns Promise<PerformancePanel>
*/
async _doOpen() {
this.panelWin.gToolbox = this.toolbox;
this.panelWin.gIsPanelDestroyed = false;
const perfFront = await this.commands.client.mainRoot.getFront("perf");
// Note: we are not using traits in the panel at the moment but we keep the
// wiring in case we need it later on.
const traits = {};
await this.panelWin.gInit(
perfFront,
traits,
"devtools",
this._openAboutProfiling
);
return this;
}
_openAboutProfiling() {
const {
openTrustedLink,
} = require("resource://devtools/client/shared/link.js");
openTrustedLink("about:profiling", {});
}
// DevToolPanel API:
/**
* @returns {Target} target
*/
get target() {
return this.toolbox.target;
}
destroy() {
// Make sure this panel is not already destroyed.
if (this._destroyed) {
return;
}
this.panelWin.gDestroy();
this.emit("destroyed");
this._destroyed = true;
this.panelWin.gIsPanelDestroyed = true;
}
}
exports.PerformancePanel = PerformancePanel;
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