Convert TabbedView to TypeScript to prove it works

src/components/structures/TabbedView.tsx

@@ -0,0 +1,136 @@
+/*
+Copyright 2017 Travis Ralston
+Copyright 2019 New Vector Ltd
+Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import * as React from "react";
+import {_t} from '../../languageHandler';
+import * as PropTypes from "prop-types";
+import * as sdk from "../../index";
+import { ReactNode } from "react";
+
+/**
+ * Represents a tab for the TabbedView.
+ */
+export class Tab {
+    public label: string;
+    public icon: string;
+    public body: React.ReactNode;
+
+    /**
+     * Creates a new tab.
+     * @param {string} tabLabel The untranslated tab label.
+     * @param {string} tabIconClass The class for the tab icon. This should be a simple mask.
+     * @param {React.ReactNode} tabJsx The JSX for the tab container.
+     */
+    constructor(tabLabel: string, tabIconClass: string, tabJsx: React.ReactNode) {
+        this.label = tabLabel;
+        this.icon = tabIconClass;
+        this.body = tabJsx;
+    }
+}
+
+interface IProps {
+    tabs: Tab[];
+}
+
+interface IState {
+    activeTabIndex: number;
+}
+
+export default class TabbedView extends React.Component<IProps, IState> {
+    static propTypes = {
+        // The tabs to show
+        tabs: PropTypes.arrayOf(PropTypes.instanceOf(Tab)).isRequired,
+    };
+
+    constructor(props: IProps) {
+        super(props);
+
+        this.state = {
+            activeTabIndex: 0,
+        };
+    }
+
+    private _getActiveTabIndex() {
+        if (!this.state || !this.state.activeTabIndex) return 0;
+        return this.state.activeTabIndex;
+    }
+
+    /**
+     * Shows the given tab
+     * @param {Tab} tab the tab to show
+     * @private
+     */
+    private _setActiveTab(tab: Tab) {
+        const idx = this.props.tabs.indexOf(tab);
+        if (idx !== -1) {
+            this.setState({activeTabIndex: idx});
+        } else {
+            console.error("Could not find tab " + tab.label + " in tabs");
+        }
+    }
+
+    private _renderTabLabel(tab: Tab) {
+        const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
+
+        let classes = "mx_TabbedView_tabLabel ";
+
+        const idx = this.props.tabs.indexOf(tab);
+        if (idx === this._getActiveTabIndex()) classes += "mx_TabbedView_tabLabel_active";
+
+        let tabIcon = null;
+        if (tab.icon) {
+            tabIcon = <span className={`mx_TabbedView_maskedIcon ${tab.icon}`} />;
+        }
+
+        const onClickHandler = () => this._setActiveTab(tab);
+
+        const label = _t(tab.label);
+        return (
+            <AccessibleButton className={classes} key={"tab_label_" + tab.label} onClick={onClickHandler}>
+                {tabIcon}
+                <span className="mx_TabbedView_tabLabel_text">
+                    { label }
+                </span>
+            </AccessibleButton>
+        );
+    }
+
+    private _renderTabPanel(tab: Tab): React.ReactNode {
+        return (
+            <div className="mx_TabbedView_tabPanel" key={"mx_tabpanel_" + tab.label}>
+                <div className='mx_TabbedView_tabPanelContent'>
+                    {tab.body}
+                </div>
+            </div>
+        );
+    }
+
+    public render(): React.ReactNode {
+        const labels = this.props.tabs.map(tab => this._renderTabLabel(tab));
+        const panel = this._renderTabPanel(this.props.tabs[this._getActiveTabIndex()]);
+
+        return (
+            <div className="mx_TabbedView">
+                <div className="mx_TabbedView_tabLabels">
+                    {labels}
+                </div>
+                {panel}
+            </div>
+        );
+    }
+}