Replace breadcrumbs with recently viewed menu (#7073)

src/components/views/rooms/RecentlyViewedButton.tsx

@@ -0,0 +1,73 @@
+/*
+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 React, { useRef } from "react";
+
+import { BreadcrumbsStore } from "../../../stores/BreadcrumbsStore";
+import { UPDATE_EVENT } from "../../../stores/AsyncStore";
+import { MenuItem } from "../../structures/ContextMenu";
+import { useEventEmitterState } from "../../../hooks/useEventEmitter";
+import { _t } from "../../../languageHandler";
+import RoomAvatar from "../avatars/RoomAvatar";
+import dis from "../../../dispatcher/dispatcher";
+import InteractiveTooltip, { Direction } from "../elements/InteractiveTooltip";
+import { roomContextDetailsText } from "../../../Rooms";
+
+const RecentlyViewedButton = () => {
+    const tooltipRef = useRef<InteractiveTooltip>();
+    const crumbs = useEventEmitterState(BreadcrumbsStore.instance, UPDATE_EVENT, () => BreadcrumbsStore.instance.rooms);
+
+    const content = <div className="mx_RecentlyViewedButton_ContextMenu">
+        <h4>{ _t("Recently viewed") }</h4>
+        <div>
+            { crumbs.map(crumb => {
+                const contextDetails = roomContextDetailsText(crumb);
+
+                return <MenuItem
+                    key={crumb.roomId}
+                    onClick={() => {
+                        dis.dispatch({
+                            action: "view_room",
+                            room_id: crumb.roomId,
+                        });
+                        tooltipRef.current?.hideTooltip();
+                    }}
+                >
+                    <RoomAvatar room={crumb} width={24} height={24} />
+                    <span className="mx_RecentlyViewedButton_entry_label">
+                        <div>{ crumb.name }</div>
+                        { contextDetails && <div className="mx_RecentlyViewedButton_entry_spaces">
+                            { contextDetails }
+                        </div> }
+                    </span>
+                </MenuItem>;
+            }) }
+        </div>
+    </div>;
+
+    return <InteractiveTooltip content={content} direction={Direction.Right} ref={tooltipRef}>
+        { ({ ref, onMouseOver }) => (
+            <span
+                className="mx_LeftPanel_recentsButton"
+                title={_t("Recently viewed")}
+                ref={ref}
+                onMouseOver={onMouseOver}
+            />
+        ) }
+    </InteractiveTooltip>;
+};
+
+export default RecentlyViewedButton;