1 files changed, 110 insertions, 0 deletions
diff --git a/devtools/client/performance-new/components/shared/ProfilerPreferenceObserver.js b/devtools/client/performance-new/components/shared/ProfilerPreferenceObserver.js
new file mode 100644
index 0000000000..ebcb55d287
--- /dev/null
+++ b/devtools/client/performance-new/components/shared/ProfilerPreferenceObserver.js
@@ -0,0 +1,110 @@
+/* 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
+
+/**
+ * @template P
+ * @typedef {import("react-redux").ResolveThunks<P>} ResolveThunks<P>
+ */
+
+/**
+ * @typedef {import("../../@types/perf").State} StoreState
+ */
+
+/**
+ * @typedef {Object} StateProps
+ * @property {import("../../@types/perf").RecordingSettings} recordingSettingsFromRedux
+ * @property {import("../../@types/perf").PageContext} pageContext
+ * @property {string[]} supportedFeatures
+ */
+
+/**
+ * @typedef {Object} ThunkDispatchProps
+ * @property {typeof actions.updateSettingsFromPreferences} updateSettingsFromPreferences
+ */
+
+/**
+ * @typedef {ResolveThunks<ThunkDispatchProps>} DispatchProps
+ * @typedef {StateProps & DispatchProps} Props
+ */
+
+"use strict";
+
+// These functions live in a JSM file so that this can be used both by this
+// CommonJS DevTools environment and the popup which isn't in such a context.
+const {
+  getRecordingSettings,
+  setRecordingSettings,
+  addPrefObserver,
+  removePrefObserver,
+} = ChromeUtils.import(
+  "resource://devtools/client/performance-new/shared/background.jsm.js"
+);
+const {
+  PureComponent,
+} = require("resource://devtools/client/shared/vendor/react.js");
+const {
+  connect,
+} = require("resource://devtools/client/shared/vendor/react-redux.js");
+
+const selectors = require("resource://devtools/client/performance-new/store/selectors.js");
+const actions = require("resource://devtools/client/performance-new/store/actions.js");
+
+/**
+ * This component mirrors the settings in the redux store and the preferences in
+ * Firefox.
+ *
+ * @extends {React.PureComponent<Props>}
+ */
+class ProfilerPreferenceObserver extends PureComponent {
+  componentDidMount() {
+    this._updateSettingsFromPreferences();
+    addPrefObserver(this._updateSettingsFromPreferences);
+  }
+
+  componentDidUpdate() {
+    const { recordingSettingsFromRedux, pageContext } = this.props;
+    setRecordingSettings(pageContext, recordingSettingsFromRedux);
+  }
+
+  componentWillUnmount() {
+    removePrefObserver(this._updateSettingsFromPreferences);
+  }
+
+  _updateSettingsFromPreferences = () => {
+    const { updateSettingsFromPreferences, pageContext, supportedFeatures } =
+      this.props;
+
+    const recordingSettingsFromPrefs = getRecordingSettings(
+      pageContext,
+      supportedFeatures
+    );
+    updateSettingsFromPreferences(recordingSettingsFromPrefs);
+  };
+
+  render() {
+    return null;
+  }
+}
+
+/**
+ * @param {StoreState} state
+ * @returns {StateProps}
+ */
+function mapStateToProps(state) {
+  return {
+    recordingSettingsFromRedux: selectors.getRecordingSettings(state),
+    pageContext: selectors.getPageContext(state),
+    supportedFeatures: selectors.getSupportedFeatures(state),
+  };
+}
+
+const mapDispatchToProps = {
+  updateSettingsFromPreferences: actions.updateSettingsFromPreferences,
+};
+
+module.exports = connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(ProfilerPreferenceObserver);