Show prompt to create new room from room directory results

res/css/structures/_RoomDirectory.scss

@@ -61,6 +61,39 @@ limitations under the License.
 .mx_RoomDirectory_tableWrapper {
     overflow-y: auto;
     flex: 1 1 0;
+
+    .mx_RoomDirectory_footer {
+        margin-top: 24px;
+        text-align: center;
+
+        > h5 {
+            margin: 0;
+            font-weight: $font-semi-bold;
+            font-size: $font-15px;
+            line-height: $font-18px;
+            color: $primary-fg-color;
+        }
+
+        > p {
+            margin: 40px auto 60px;
+            font-size: $font-14px;
+            line-height: $font-20px;
+            color: $secondary-fg-color;
+            max-width: 464px; // easier reading
+        }
+
+        > hr {
+            margin: 0;
+            border: none;
+            height: 1px;
+            background-color: $header-panel-bg-color;
+        }
+
+        .mx_RoomDirectory_newRoom {
+            margin: 24px auto 0;
+            width: max-content;
+        }
+    }
 }
 
 .mx_RoomDirectory_table {
@@ -138,11 +171,6 @@ limitations under the License.
     color: $settings-grey-fg-color;
 }
 
-.mx_RoomDirectory_table tr {
-    padding-bottom: 10px;
-    cursor: pointer;
-}
-
 .mx_RoomDirectory .mx_RoomView_MessageList {
     padding: 0;
 }

src/components/structures/RoomDirectory.tsx

@@ -672,22 +672,43 @@ export default class RoomDirectory extends React.Component<IProps, IState> {
                 spinner = <Spinner />;
             }
 
+            const createNewButton = <>
+                <hr />
+                <AccessibleButton kind="primary" onClick={this.onCreateRoomClick} className="mx_RoomDirectory_newRoom">
+                    { _t("Create new room") }
+                </AccessibleButton>
+            </>;
+
             let scrollPanelContent;
+            let footer;
             if (cells.length === 0 && !this.state.loading) {
-                scrollPanelContent = <i>{ _t('No rooms to show') }</i>;
+                footer = <>
+                    <h5>{ _t('No results for "%(query)s"', { query: this.state.filterString.trim() }) }</h5>
+                    <p>
+                        { _t("Try different words or check for typos. " +
+                            "Some results may not be visible as they're private and you need an invite to see them.") }
+                    </p>
+                    { createNewButton }
+                </>;
             } else {
                 scrollPanelContent = <div className="mx_RoomDirectory_table">
                     { cells }
                 </div>;
+                if (!this.state.loading && !this.nextBatch) {
+                    footer = createNewButton;
+                }
             }
             content = <ScrollPanel
                 className="mx_RoomDirectory_tableWrapper"
-                onFillRequest={ this.onFillRequest }
+                onFillRequest={this.onFillRequest}
                 stickyBottom={false}
                 startAtBottom={false}
             >
                 { scrollPanelContent }
                 { spinner }
+                { footer && <div className="mx_RoomDirectory_footer">
+                    { footer }
+                </div> }
             </ScrollPanel>;
         }
 

src/i18n/strings/en_EN.json

@@ -2646,6 +2646,8 @@
     "Unable to look up room ID from server": "Unable to look up room ID from server",
     "Preview": "Preview",
     "View": "View",
+    "No results for \"%(query)s\"": "No results for \"%(query)s\"",
+    "Try different words or check for typos. Some results may not be visible as they're private and you need an invite to see them.": "Try different words or check for typos. Some results may not be visible as they're private and you need an invite to see them.",
     "Find a room…": "Find a room…",
     "Find a room… (e.g. %(exampleRoom)s)": "Find a room… (e.g. %(exampleRoom)s)",
     "If you can't find the room you're looking for, ask for an invite or <a>Create a new room</a>.": "If you can't find the room you're looking for, ask for an invite or <a>Create a new room</a>.",