Rate-limit next/previous room activation

src/qml/Base/HRateLimiter.qml

@@ -0,0 +1,46 @@
+import QtQuick 2.12
+
+QtObject {
+    property int cooldown: 250
+    property bool extendOnRequestWhileCooldownActive: false
+
+    property bool firePending: false
+
+    readonly property Timer timer: Timer {
+        property bool extended: false
+
+        interval: cooldown
+        onTriggered: {
+            if (firePending) {
+                if (extendOnRequestWhileCooldownActive && ! extended) {
+                    firePending = false
+                    extended = true
+                    running = true
+                    return
+                }
+
+                fired()
+                firePending = false
+                extended = false
+            } else if (extended) {
+                fired()
+                extended = false
+            }
+        }
+    }
+
+
+    signal requestFire()
+    signal fired()
+
+    onRequestFire: {
+        if (timer.running) {
+            firePending = true
+            return
+        }
+
+        fired()
+        firePending   = false
+        timer.running = true
+    }
+}

src/qml/SidePane/AccountRoomList.qml

@@ -52,12 +52,13 @@ HListView {
 
     function previous() {
         decrementCurrentIndex()
-        currentItem.item.activate()
+        activateLimiter.requestFire()
+
     }
 
     function next() {
         incrementCurrentIndex()
-        currentItem.item.activate()
+        activateLimiter.requestFire()
     }
 
     function toggleCollapseAccount() {
@@ -91,4 +92,11 @@ HListView {
         source: "Delegate" +
                 (model.type == "Account" ? "Account.qml" : "Room.qml")
     }
+
+
+    HRateLimiter {
+        id: activateLimiter
+        onFired: currentItem.item.activate()
+        extendOnRequestWhileCooldownActive: true
+    }
 }