Convert GenericElementContextMenu to TS

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/components/views/context_menus/GenericElementContextMenu.tsx

@@ -0,0 +1,55 @@
+/*
+Copyright 2017 New Vector Ltd
+
+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 React from 'react';
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+
+interface IProps {
+    element: React.ReactNode;
+    // Function to be called when the parent window is resized
+    // This can be used to reposition or close the menu on resize and
+    // ensure that it is not displayed in a stale position.
+    onResize?: () => void;
+}
+
+/**
+ * This component can be used to display generic HTML content in a contextual
+ * menu.
+ */
+@replaceableComponent("views.context_menus.GenericElementContextMenu")
+export default class GenericElementContextMenu extends React.Component<IProps> {
+    constructor(props: IProps) {
+        super(props);
+    }
+
+    public componentDidMount(): void {
+        window.addEventListener("resize", this.resize);
+    }
+
+    public componentWillUnmount(): void {
+        window.removeEventListener("resize", this.resize);
+    }
+
+    private resize = (): void => {
+        if (this.props.onResize) {
+            this.props.onResize();
+        }
+    };
+
+    public render(): JSX.Element {
+        return <div>{ this.props.element }</div>;
+    }
+}