Alt+Shift+Up/Down to switch to previous/next unread room

This is the same key combination as commonly used by other chat clients
such as Element, Slack and Discord. For consistency, also add the same
Alt+Up/Down shortcut as used in thes other clients as aliases for
switching rooms without considering the unread status.

src/qml/Page/RoomListPage.qml

@@ -131,10 +131,10 @@ Kirigami.ScrollablePage {
         }
     }
 
-    function goToNextRoom() {
+    function goToNextRoomFiltered(condition) {
         let index = listView.currentIndex;
         while (index++ !== listView.count - 1) {
-            if (listView.itemAtIndex(index).visible) {
+            if (condition(listView.itemAtIndex(index))) {
                 listView.currentIndex = index;
                 listView.currentItem.action.trigger();
                 return;
@@ -142,10 +142,10 @@ Kirigami.ScrollablePage {
         }
     }
 
-    function goToPreviousRoom() {
+    function goToPreviousRoomFiltered(condition) {
         let index = listView.currentIndex;
         while (index-- !== 0) {
-            if (listView.itemAtIndex(index).visible) {
+            if (condition(listView.itemAtIndex(index))) {
                 listView.currentIndex = index;
                 listView.currentItem.action.trigger();
                 return;
@@ -153,6 +153,22 @@ Kirigami.ScrollablePage {
         }
     }
 
+    function goToNextRoom() {
+        goToNextRoomFiltered((item) => item.visible);
+    }
+
+    function goToPreviousRoom() {
+        goToPreviousRoomFiltered((item) => item.visible);
+    }
+
+    function goToNextUnreadRoom() {
+        goToNextRoomFiltered((item) => (item.visible && item.hasUnread));
+    }
+
+    function goToPreviousUnreadRoom() {
+        goToPreviousRoomFiltered((item) => (item.visible && item.hasUnread));
+    }
+
     titleDelegate: collapsedMode ? empty : searchField
 
     Component {
@@ -428,6 +444,8 @@ Kirigami.ScrollablePage {
                     })
                     menu.open()
                 }
+
+                readonly property bool hasUnread: unreadCount > 0
             }
         }
     }

src/qml/main.qml

@@ -318,18 +318,32 @@ Kirigami.ApplicationWindow {
             id: roomList
 
             Shortcut {
-                sequences: ["Ctrl+PgUp", "Ctrl+Backtab"]
+                sequences: ["Ctrl+PgUp", "Ctrl+Backtab", "Alt+Up"]
                 onActivated: {
                     roomList.goToPreviousRoom();
                 }
             }
 
             Shortcut {
-                sequences: ["Ctrl+PgDown", "Ctrl+Tab"]
+                sequences: ["Ctrl+PgDown", "Ctrl+Tab", "Alt+Down"]
                 onActivated: {
                     roomList.goToNextRoom();
                 }
             }
+
+            Shortcut {
+                sequence: "Alt+Shift+Up"
+                onActivated: {
+                    roomList.goToPreviousUnreadRoom();
+                }
+            }
+
+            Shortcut {
+                sequence: "Alt+Shift+Down"
+                onActivated: {
+                    roomList.goToNextUnreadRoom();
+                }
+            }
         }
     }