Merge pull request #49 from bwindels/bwindels/showimages

Show images in timeline

src/domain/session/room/timeline/tiles/ImageTile.js

@@ -1,26 +1,48 @@
 import {MessageTile} from "./MessageTile.js";
 
+const MAX_HEIGHT = 300;
+const MAX_WIDTH = 400;
+
 export class ImageTile extends MessageTile {
-    constructor(options) {
+    constructor(options, room) {
         super(options);
-
-        // we start loading the image here,
-        // and call this._emitUpdate once it's loaded?
-        // or maybe we have an becameVisible() callback on tiles where we start loading it?
-    }
-    get src() {
-        return "";
+        this._room = room;
     }
 
-    get width() {
-        return 200;
+    get thumbnailUrl() {
+        const mxcUrl = this._getContent().url;
+        return this._room.mxcUrlThumbnail(mxcUrl, this.thumbnailWidth, this.thumbnailHeigth, "scale");
     }
 
-    get height() {
-        return 200;
+    get url() {
+        const mxcUrl = this._getContent().url;
+        return this._room.mxcUrl(mxcUrl);   
+    }
+
+    _scaleFactor() {
+        const {info} = this._getContent();
+        const scaleHeightFactor = MAX_HEIGHT / info.h;
+        const scaleWidthFactor = MAX_WIDTH / info.w;
+        // take the smallest scale factor, to respect all constraints
+        // we should not upscale images, so limit scale factor to 1 upwards
+        return Math.min(scaleWidthFactor, scaleHeightFactor, 1);
+    }
+
+    get thumbnailWidth() {
+        const {info} = this._getContent();
+        return Math.round(info.w * this._scaleFactor());
+    }
+
+    get thumbnailHeigth() {
+        const {info} = this._getContent();
+        return Math.round(info.h * this._scaleFactor());
     }
 
     get label() {
-        return "this is an image";
+        return this._getContent().body;
+    }
+
+    get shape() {
+        return "image";
     }
 }

src/domain/session/room/timeline/tilesCreator.js

@@ -1,5 +1,6 @@
 import {GapTile} from "./tiles/GapTile.js";
 import {TextTile} from "./tiles/TextTile.js";
+import {ImageTile} from "./tiles/ImageTile.js";
 import {LocationTile} from "./tiles/LocationTile.js";
 import {RoomNameTile} from "./tiles/RoomNameTile.js";
 import {RoomMemberTile} from "./tiles/RoomMemberTile.js";
@@ -20,8 +21,7 @@ export function tilesCreator({room, ownUserId}) {
                         case "m.emote":
                             return new TextTile(options);
                         case "m.image":
-                            return null; // not supported yet
-                            // return new ImageTile(options);
+                            return new ImageTile(options, room);
                         case "m.location":
                             return new LocationTile(options);
                         default:

src/matrix/net/HomeServerApi.js

@@ -73,8 +73,8 @@ export class HomeServerApi {
         );
     }
 
-    _request(method, url, queryParams, body, options) {
-        const queryString = Object.entries(queryParams || {})
+    _encodeQueryParams(queryParams) {
+        return Object.entries(queryParams || {})
             .filter(([, value]) => value !== undefined)
             .map(([name, value]) => {
                 if (typeof value === "object") {
@@ -83,6 +83,10 @@ export class HomeServerApi {
                 return `${encodeURIComponent(name)}=${encodeURIComponent(value)}`;
             })
             .join("&");
+    }
+
+    _request(method, url, queryParams, body, options) {
+        const queryString = this._encodeQueryParams(queryParams);
         url = `${url}?${queryString}`;
         let bodyString;
         const headers = new Map();
@@ -166,6 +170,35 @@ export class HomeServerApi {
     versions(options = null) {
         return this._request("GET", `${this._homeserver}/_matrix/client/versions`, null, null, options);
     }
+
+    _parseMxcUrl(url) {
+        const prefix = "mxc://";
+        if (url.startsWith(prefix)) {
+            return url.substr(prefix.length).split("/", 2);
+        } else {
+            return null;
+        }
+    }
+
+    mxcUrlThumbnail(url, width, height, method) {
+        const parts = this._parseMxcUrl(url);
+        if (parts) {
+            const [serverName, mediaId] = parts;
+            const httpUrl = `${this._homeserver}/_matrix/media/r0/thumbnail/${encodeURIComponent(serverName)}/${encodeURIComponent(mediaId)}`;
+            return httpUrl + "?" + this._encodeQueryParams({width, height, method});
+        }
+        return null;
+    }
+
+    mxcUrl(url) {
+        const parts = this._parseMxcUrl(url);
+        if (parts) {
+            const [serverName, mediaId] = parts;
+            return `${this._homeserver}/_matrix/media/r0/download/${encodeURIComponent(serverName)}/${encodeURIComponent(mediaId)}`;
+        } else {
+            return null;
+        }
+    }
 }
 
 export function tests() {

src/matrix/room/Room.js

@@ -130,5 +130,13 @@ export class Room extends EventEmitter {
         await this._timeline.load();
         return this._timeline;
     }
+
+    mxcUrlThumbnail(url, width, height, method) {
+        return this._hsApi.mxcUrlThumbnail(url, width, height, method);
+    }
+
+    mxcUrl(url) {
+        return this._hsApi.mxcUrl(url);
+    }
 }
 

src/ui/web/session/room/TimelineList.js

@@ -1,6 +1,7 @@
 import {ListView} from "../../general/ListView.js";
 import {GapView} from "./timeline/GapView.js";
 import {TextMessageView} from "./timeline/TextMessageView.js";
+import {ImageView} from "./timeline/ImageView.js";
 import {AnnouncementView} from "./timeline/AnnouncementView.js";
 
 export class TimelineList extends ListView {
@@ -10,7 +11,8 @@ export class TimelineList extends ListView {
             switch (entry.shape) {
                 case "gap": return new GapView(entry);
                 case "announcement": return new AnnouncementView(entry);
-                case "message":return new TextMessageView(entry);
+                case "message": return new TextMessageView(entry);
+                case "image": return new ImageView(entry);
             }
         });
         this._atBottom = false;

src/ui/web/session/room/timeline/ImageView.js

@@ -0,0 +1,15 @@
+import {TemplateView} from "../../../general/TemplateView.js";
+
+export class ImageView extends TemplateView {
+    render(t, vm) {
+        return t.li(
+            {className: {"TextMessageView": true, own: vm.isOwn, pending: vm.isPending}},
+            t.div({className: "message-container"}, [
+                t.div({className: "sender"}, vm => vm.isContinuation ? "" : vm.sender),
+                t.div(t.a({href: vm.url, target: "_blank"},
+                    t.img({src: vm.thumbnailUrl, width: vm.thumbnailWidth, heigth: vm.thumbnailHeigth, loading: "lazy", alt: vm.label}))),
+                t.p(t.time(vm.date + " " + vm.time)),
+            ])
+        );
+    }
+}