give more top padding to gaps that appear in the middle of the timeline

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

@@ -22,6 +22,7 @@ export class GapTile extends SimpleTile {
         super(options);
         this._loading = false;
         this._error = null;
+        this._isAtTop = true;
     }
 
     async fill() {
@@ -48,6 +49,21 @@ export class GapTile extends SimpleTile {
         this.fill();
     }
 
+    get isAtTop() {
+        return this._isAtTop;
+    }
+
+    updatePreviousSibling(prev) {
+        console.log("GapTile.updatePreviousSibling", prev);
+        super.updatePreviousSibling(prev);
+        const isAtTop = !prev;
+        if (this._isAtTop !== isAtTop) {
+            this._isAtTop = isAtTop;
+            console.log("isAtTop", this._isAtTop);
+            this.emitChange("isAtTop");
+        }
+    }
+
     updateEntry(entry, params) {
         super.updateEntry(entry, params);
         if (!entry.isGap) {

src/platform/web/ui/css/themes/element/timeline.css

@@ -362,3 +362,11 @@ only loads when the top comes into view*/
 .GapView > :not(:first-child) {
     margin-left: 12px;
 }
+
+.GapView {
+    padding: 52px 20px;
+}
+
+.GapView.isAtTop {
+    padding: 52px 20px 12px 20px;
+}

src/platform/web/ui/css/timeline.css

@@ -61,7 +61,6 @@ limitations under the License.
 
 .GapView {
     display: flex;
-    padding: 52px 20px 12px 20px;
 }
 
 .GapView > :nth-child(2) {

src/platform/web/ui/session/room/timeline/GapView.js

@@ -21,7 +21,8 @@ export class GapView extends TemplateView {
     render(t, vm) {
         const className = {
             GapView: true,
-            isLoading: vm => vm.isLoading
+            isLoading: vm => vm.isLoading,
+            isAtTop: vm => vm.isAtTop,
         };
         return t.li({className}, [
             spinner(t),