Move download button for media to the action bar

res/css/views/messages/_MessageActionBar.scss

@@ -107,3 +107,12 @@ limitations under the License.
 .mx_MessageActionBar_cancelButton::after {
     mask-image: url('$(res)/img/element-icons/trashcan.svg');
 }
+
+.mx_MessageActionBar_downloadButton::after {
+    mask-size: 14px;
+    mask-image: url('$(res)/img/download.svg');
+}
+
+.mx_MessageActionBar_downloadButton.mx_MessageActionBar_downloadSpinnerButton::after {
+    background-color: transparent; // hide the download icon mask
+}

src/@types/common.ts

@@ -14,11 +14,12 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { JSXElementConstructor } from "react";
+import React, { JSXElementConstructor } from "react";
 
 // Based on https://stackoverflow.com/a/53229857/3532235
 export type Without<T, U> = {[P in Exclude<keyof T, keyof U>]?: never};
 export type XOR<T, U> = (T | U) extends object ? (Without<T, U> & U) | (Without<U, T> & T) : T | U;
 export type Writeable<T> = { -readonly [P in keyof T]: T[P] };
 
 export type ComponentClass = keyof JSX.IntrinsicElements | JSXElementConstructor<any>;
+export type ReactAnyComponent = React.Component | React.ExoticComponent;

src/components/views/context_menus/MessageContextMenu.tsx

@@ -43,11 +43,15 @@ export function canCancel(eventStatus: EventStatus): boolean {
     return eventStatus === EventStatus.QUEUED || eventStatus === EventStatus.NOT_SENT;
 }
 
-interface IEventTileOps {
+export interface IEventTileOps {
     isWidgetHidden(): boolean;
     unhideWidget(): void;
 }
 
+export interface IOperableEventTile {
+    getEventTileOps(): IEventTileOps;
+}
+
 interface IProps {
     /* the MatrixEvent associated with the context menu */
     mxEvent: MatrixEvent;

src/components/views/messages/DownloadActionButton.tsx

@@ -0,0 +1,109 @@
+/*
+Copyright 2021 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 { MatrixEvent } from "matrix-js-sdk/src";
+import { MediaEventHelper } from "../../../utils/MediaEventHelper";
+import React, { createRef } from "react";
+import { RovingAccessibleTooltipButton } from "../../../accessibility/RovingTabIndex";
+import Spinner from "../elements/Spinner";
+import classNames from "classnames";
+import { _t } from "../../../languageHandler";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+
+interface IProps {
+    mxEvent: MatrixEvent;
+
+    // XXX: It can take a cycle or two for the MessageActionBar to have all the props/setup
+    // required to get us a MediaEventHelper, so we use a getter function instead to prod for
+    // one.
+    mediaEventHelperGet: () => MediaEventHelper;
+}
+
+interface IState {
+    loading: boolean;
+    blob?: Blob;
+}
+
+@replaceableComponent("views.messages.DownloadActionButton")
+export default class DownloadActionButton extends React.PureComponent<IProps, IState> {
+    private iframe: React.RefObject<HTMLIFrameElement> = createRef();
+
+    public constructor(props: IProps) {
+        super(props);
+
+        this.state = {
+            loading: false,
+        };
+    }
+
+    private onDownloadClick = async () => {
+        if (this.state.loading) return;
+
+        this.setState({ loading: true });
+
+        if (this.state.blob) {
+            // Cheat and trigger a download, again.
+            return this.onFrameLoad();
+        }
+
+        const blob = await this.props.mediaEventHelperGet().sourceBlob.value;
+        this.setState({ blob });
+    };
+
+    private onFrameLoad = () => {
+        this.setState({ loading: false });
+
+        // we aren't showing the iframe, so we can send over the bare minimum styles and such.
+        this.iframe.current.contentWindow.postMessage({
+            imgSrc: "", // no image
+            imgStyle: null,
+            style: "",
+            blob: this.state.blob,
+            download: this.props.mediaEventHelperGet().fileName,
+            textContent: "",
+            auto: true, // autodownload
+        }, '*');
+    };
+
+    public render() {
+        let spinner: JSX.Element;
+        if (this.state.loading) {
+            spinner = <Spinner w={18} h={18} />;
+        }
+
+        const classes = classNames({
+            'mx_MessageActionBar_maskButton': true,
+            'mx_MessageActionBar_downloadButton': true,
+            'mx_MessageActionBar_downloadSpinnerButton': !!spinner,
+        });
+
+        return <RovingAccessibleTooltipButton
+            className={classes}
+            title={spinner ? _t("Downloading") : _t("Download")}
+            onClick={this.onDownloadClick}
+            disabled={!!spinner}
+        >
+            { spinner }
+            { this.state.blob && <iframe
+                src={"usercontent/" /* XXX: Like MFileBody, this should come from the skin */}
+                ref={this.iframe}
+                onLoad={this.onFrameLoad}
+                sandbox="allow-scripts allow-downloads allow-downloads-without-user-activation"
+                style={{ display: "none" }}
+            /> }
+        </RovingAccessibleTooltipButton>;
+    }
+}

src/components/views/messages/IBodyProps.ts

@@ -0,0 +1,43 @@
+/*
+Copyright 2021 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 { MatrixEvent } from "matrix-js-sdk/src";
+import { TileShape } from "../rooms/EventTile";
+import { MediaEventHelper } from "../../../utils/MediaEventHelper";
+import EditorStateTransfer from "../../../utils/EditorStateTransfer";
+import { RoomPermalinkCreator } from "../../../utils/permalinks/Permalinks";
+
+export interface IBodyProps {
+    mxEvent: MatrixEvent;
+
+    /* a list of words to highlight */
+    highlights: string[];
+
+    /* link URL for the highlights */
+    highlightLink: string;
+
+    /* callback called when dynamic content in events are loaded */
+    onHeightChanged: () => void;
+
+    showUrlPreview?: boolean;
+    tileShape: TileShape;
+    maxImageHeight?: number;
+    replacingEventId?: string;
+    editState?: EditorStateTransfer;
+    onMessageAllowed: () => void; // TODO: Docs
+    permalinkCreator: RoomPermalinkCreator;
+    mediaEventHelper: MediaEventHelper;
+}

src/components/views/messages/IMediaBody.ts

@@ -0,0 +1,21 @@
+/*
+Copyright 2021 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 { MediaEventHelper } from "../../../utils/MediaEventHelper";
+
+export interface IMediaBody {
+    getMediaHelper(): MediaEventHelper;
+}

src/components/views/messages/MAudioBody.tsx

@@ -15,64 +15,58 @@ limitations under the License.
 */
 
 import React from "react";
-import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { Playback } from "../../../voice/Playback";
-import MFileBody from "./MFileBody";
 import InlineSpinner from '../elements/InlineSpinner';
 import { _t } from "../../../languageHandler";
-import { mediaFromContent } from "../../../customisations/Media";
-import { decryptFile } from "../../../utils/DecryptFile";
-import { IMediaEventContent } from "../../../customisations/models/IMediaEventContent";
 import AudioPlayer from "../audio_messages/AudioPlayer";
-
-interface IProps {
-    mxEvent: MatrixEvent;
-}
+import { IMediaEventContent } from "../../../customisations/models/IMediaEventContent";
+import MFileBody from "./MFileBody";
+import { IBodyProps } from "./IBodyProps";
 
 interface IState {
     error?: Error;
     playback?: Playback;
-    decryptedBlob?: Blob;
 }
 
 @replaceableComponent("views.messages.MAudioBody")
-export default class MAudioBody extends React.PureComponent<IProps, IState> {
-    constructor(props: IProps) {
+export default class MAudioBody extends React.PureComponent<IBodyProps, IState> {
+    constructor(props: IBodyProps) {
         super(props);
 
         this.state = {};
     }
 
     public async componentDidMount() {
         let buffer: ArrayBuffer;
-        const content: IMediaEventContent = this.props.mxEvent.getContent();
-        const media = mediaFromContent(content);
-        if (media.isEncrypted) {
+
+        try {
             try {
-                const blob = await decryptFile(content.file);
+                const blob = await this.props.mediaEventHelper.sourceBlob.value;
                 buffer = await blob.arrayBuffer();
-                this.setState({ decryptedBlob: blob });
             } catch (e) {
                 this.setState({ error: e });
                 console.warn("Unable to decrypt audio message", e);
                 return; // stop processing the audio file
             }
-        } else {
-            try {
-                buffer = await media.downloadSource().then(r => r.blob()).then(r => r.arrayBuffer());
-            } catch (e) {
-                this.setState({ error: e });
-                console.warn("Unable to download audio message", e);
-                return; // stop processing the audio file
-            }
+        } catch (e) {
+            this.setState({ error: e });
+            console.warn("Unable to decrypt/download audio message", e);
+            return; // stop processing the audio file
         }
 
         // We should have a buffer to work with now: let's set it up
-        const playback = new Playback(buffer);
+
+        // Note: we don't actually need a waveform to render an audio event, but voice messages do.
+        const content = this.props.mxEvent.getContent<IMediaEventContent>();
+        const waveform = content?.["org.matrix.msc1767.audio"]?.waveform?.map(p => p / 1024);
+
+        // We should have a buffer to work with now: let's set it up
+        const playback = new Playback(buffer, waveform);
         playback.clockInfo.populatePlaceholdersFrom(this.props.mxEvent);
         this.setState({ playback });
-        // Note: the RecordingPlayback component will handle preparing the Playback class for us.
+
+        // Note: the components later on will handle preparing the Playback class for us.
     }
 
     public componentWillUnmount() {
@@ -103,7 +97,7 @@ export default class MAudioBody extends React.PureComponent<IProps, IState> {
         return (
             <span className="mx_MAudioBody">
                 <AudioPlayer playback={this.state.playback} mediaName={this.props.mxEvent.getContent().body} />
-                <MFileBody {...this.props} decryptedBlob={this.state.decryptedBlob} showGenericPlaceholder={false} />
+                { this.props.tileShape && <MFileBody {...this.props} showGenericPlaceholder={false} /> }
             </span>
         );
     }