128 lines
3.6 KiB
JavaScript
128 lines
3.6 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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// @ts-check
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/**
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* @typedef {import("../../@types/perf").PerfFront} PerfFront
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* @typedef {import("../../@types/perf").RecordingState} RecordingState
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* @typedef {import("../../@types/perf").State} StoreState
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* @typedef {import("../../@types/perf").RootTraits} RootTraits
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* @typedef {import("../../@types/perf").PanelWindow} PanelWindow
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*/
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/**
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* @template P
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* @typedef {import("react-redux").ResolveThunks<P>} ResolveThunks<P>
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*/
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/**
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* @typedef {Object} StateProps
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* @property {RecordingState} recordingState
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* @property {boolean?} isSupportedPlatform
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*/
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/**
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* @typedef {Object} ThunkDispatchProps
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* @property {typeof actions.reportProfilerReady} reportProfilerReady
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* @property {typeof actions.reportProfilerStarted} reportProfilerStarted
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* @property {typeof actions.reportProfilerStopped} reportProfilerStopped
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*/
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/**
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* @typedef {Object} OwnProps
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* @property {PerfFront} perfFront
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* @property {RootTraits} traits
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*/
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/**
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* @typedef {ResolveThunks<ThunkDispatchProps>} DispatchProps
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* @typedef {StateProps & DispatchProps & OwnProps} Props
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*/
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"use strict";
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const {
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PureComponent,
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} = require("resource://devtools/client/shared/vendor/react.mjs");
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const {
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connect,
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} = require("resource://devtools/client/shared/vendor/react-redux.js");
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const actions = require("resource://devtools/client/performance-new/store/actions.js");
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const selectors = require("resource://devtools/client/performance-new/store/selectors.js");
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/**
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* This component state changes for the performance recording. e.g. If the profiler
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* suddenly becomes unavailable, it needs to react to those changes, and update the
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* recordingState in the store.
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*
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* @extends {React.PureComponent<Props>}
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*/
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class ProfilerEventHandling extends PureComponent {
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componentDidMount() {
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const {
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perfFront,
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isSupportedPlatform,
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reportProfilerReady,
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reportProfilerStarted,
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reportProfilerStopped,
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} = this.props;
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if (!isSupportedPlatform) {
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return;
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}
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// Ask for the initial state of the profiler.
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perfFront.isActive().then(isActive => reportProfilerReady(isActive));
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// Handle when the profiler changes state. It might be us, it might be someone else.
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this.props.perfFront.on("profiler-started", reportProfilerStarted);
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this.props.perfFront.on("profiler-stopped", reportProfilerStopped);
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}
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componentWillUnmount() {
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switch (this.props.recordingState) {
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case "not-yet-known":
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case "available-to-record":
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case "request-to-stop-profiler":
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case "request-to-get-profile-and-stop-profiler":
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// Do nothing for these states.
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break;
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case "recording":
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case "request-to-start-recording":
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this.props.perfFront.stopProfilerAndDiscardProfile();
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break;
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default:
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throw new Error("Unhandled recording state.");
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}
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}
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render() {
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return null;
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}
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}
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/**
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* @param {StoreState} state
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* @returns {StateProps}
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*/
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function mapStateToProps(state) {
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return {
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recordingState: selectors.getRecordingState(state),
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isSupportedPlatform: selectors.getIsSupportedPlatform(state),
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};
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}
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/** @type {ThunkDispatchProps} */
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const mapDispatchToProps = {
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reportProfilerReady: actions.reportProfilerReady,
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reportProfilerStarted: actions.reportProfilerStarted,
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reportProfilerStopped: actions.reportProfilerStopped,
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};
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module.exports = connect(
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mapStateToProps,
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mapDispatchToProps
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)(ProfilerEventHandling);
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