Migrate ViewSourceEvent to TypeScript

src/components/views/messages/ViewSourceEvent.tsx

@@ -0,0 +1,84 @@
+/*
+Copyright 2019 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 React from 'react';
+import { MatrixEvent } from 'matrix-js-sdk/src';
+import classNames from 'classnames';
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { MatrixClientPeg } from "../../../MatrixClientPeg";
+
+interface IProps {
+    mxEvent: MatrixEvent;
+}
+
+interface IState {
+    expanded: boolean;
+}
+
+@replaceableComponent("views.messages.ViewSourceEvent")
+export default class ViewSourceEvent extends React.PureComponent<IProps, IState> {
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            expanded: false,
+        };
+    }
+
+    public componentDidMount(): void {
+        const { mxEvent } = this.props;
+
+        const client = MatrixClientPeg.get();
+        client.decryptEventIfNeeded(mxEvent);
+
+        if (mxEvent.isBeingDecrypted()) {
+            mxEvent.once("Event.decrypted", () => this.forceUpdate());
+        }
+    }
+
+    private onToggle = (ev: React.MouseEvent) => {
+        ev.preventDefault();
+        const { expanded } = this.state;
+        this.setState({
+            expanded: !expanded,
+        });
+    };
+
+    public render(): React.ReactNode {
+        const { mxEvent } = this.props;
+        const { expanded } = this.state;
+
+        let content;
+        if (expanded) {
+            content = <pre>{ JSON.stringify(mxEvent, null, 4) }</pre>;
+        } else {
+            content = <code>{ `{ "type": ${mxEvent.getType()} }` }</code>;
+        }
+
+        const classes = classNames("mx_ViewSourceEvent mx_EventTile_content", {
+            mx_ViewSourceEvent_expanded: expanded,
+        });
+
+        return <span className={classes}>
+            { content }
+            <a
+                className="mx_ViewSourceEvent_toggle"
+                href="#"
+                onClick={this.onToggle}
+            />
+        </span>;
+    }
+}